Method and apparatus for controlling illumination system in controlled temperature environment

FIELD: physics, control.

SUBSTANCE: invention relates to a method of controlling an illumination system in a controlled temperature environment and to a control system for a controlled temperature environment having an illumination system. The output signal of the illumination system causes a temperature response in the controlled temperature environment, the temperature response being detected by a sensor, the method comprising steps of regulating the temperature adaptively based on the output signal of the illumination system and the associated temperature response. The control system for the controlled temperature environment has a sensor lying next to the casing of the controlled temperature environment and is configured to control illumination, wherein output signal of the illumination system causes a temperature response in the controlled temperature environment, the temperature response being detected by the sensor, and the control system is configured to regulate the temperature adaptively based on the output signal of the illumination system and the associated temperature response.

EFFECT: high stability of illumination.

14 cl, 4 dwg

The scope of the invention

The present invention relates to a method of controlling a lighting system in an environment with controlled temperature. The present invention additionally relates to a control system for an environment with controlled temperature with the lighting system.

Prior art

Currently in supermarkets are stacked refrigerated shelves for placing a variety of fresh, packaged food products. Such products are usually perishable and deteriorate very quickly, especially if you have exceeded the maximum allowable temperature. In many countries there are laws about what products are stored at temperatures above the maximum allowed, or should be withdrawn from sale, or they must be shortened deadline date. The last option is often difficult to implement, because the deadline date printed on the package and modify it easily. Under normal conditions, the multi-tier refrigeration shelves, used for placing such products, ensure that this temperature is ensured. However, when the cooling counter is loaded correctly (when it has too many products), the flow of air is disturbed and the heat generated by the lights under the shelves, increases the t of the temperature on the shelf above the maximum allowable temperature. This problem leads to the fact that supermarkets are reluctant to use the lighting under the shelves, because by law they can be held responsible if the products will deteriorate as a result of exceeding the maximum allowable temperature, or if it receives a claim from, for example, Control for sanitary supervision of food and drug administration (USA), Agency for standards of food products (UK) or food and goods (Voedsel en warenauthoriteit, the Netherlands).

In the US 2007/087614 A2 describes a control system for illuminated display cabinets, display Cabinet contains a sensor that can be used as a switch or as a controller for regulating the power supplied to the light sources in the display case. The following describes an embodiment of the control circuit in which the voltage applied to the light sources is turned off when the sensor detects that the temperature in the Cabinet exceeds a predetermined temperature. When the temperature inside the case is returned to an acceptable value, the light source is energized.

In normal lighted display cases there is a risk that the transition temperature for the specified limits, as environmental conditions change frequently. There is therefore a need for improved lighting control.

In view of the foregoing it would be desirable to create a method of controlling a lighting system in an environment with controlled temperature. It would also be desirable to provide a control system for an environment with controlled temperature with the lighting system. These and other objectives are achieved by methods and devices according to the present invention.

According to the first aspect of the present invention provides a method of controlling a lighting system in an environment with controlled temperature. The output signal of the lighting system leads to the temperature response in an environment with controlled temperature, where the temperature response is detected by a sensor. Temperature adaptive regulate on the basis of the output signal of the lighting system and the associated temperature response. Adaptive control based on the output signal of the lighting and temperature response, allows you to achieve more precise temperature control, in particular in the context of changing environmental factors. There are several environmental factors that affect the temperature response in an environment with controlled temperature, such as the number of objects in contact with the environment with controlled temperature, which has the purpose or to cool or to heat these items. Further, thermal characteristics of the objects or any casing, which can extend the environment with controlled temperature, or any other element in contact with an environment with controlled temperature affects the temperature response caused by the output signal of the lighting system, as well as the location of such items and items. The output signal of the lighting system may be light intensity or power consumption of the lighting system or any other parameter that determines the output signal light or which may correlate with the output signal lighting. The temperature response can be interpreted as the change in temperature under the action of the output signal of the lighting system. The amount of heat generated by the lighting system directly correlates with the amount of power dissipated by the lighting system, which directly correlates with thermal load of the lighting system. Thus, the change of the output signal of the lighting system can directly affect the temperature response.

In embodiments implementing the present invention it is possible to determine the delay of the temperature response. The delay can be interpreted as a gradual change between the first temperature value associated with the first output signal and the second temperature value associated with the second output signal of the lighting system. Determining the delay rate is temperature response in an environment with controlled temperature can be quantitatively determine the effect of the combination of external factors, including ambient temperature. In the result, we can predict the change of the output signal of the lighting system for the consideration of subsequent temperature changes caused by environmental factors.

In embodiments implementing the present invention, the output signal may include a change between the first and second values for light, thereby changing the output signal. Changing the output signal between the first and second illumination parameters, it is possible to determine the delay of the temperature response change when the first and second values for light. Mainly, the change between the first and second illumination parameters is within, not perceptible to the naked eye.

In embodiments implementing the present invention, the output signal of the lighting system may include at least first and second changes, which are separated by a predetermined time interval. The change between the first and second illumination parameters may occur in the form of a repeated sequence, to determine the delay in the temperature response at each instantaneous change in the output signal. This has advantages, because the environmental conditions and, therefore, the temperature response can be modified for p is period management. The time intervals between each instant change can be chosen to reflect the frequency in the number of changes of environmental factors.

In embodiments implementing the present invention, the temperature response can contain the temperature characteristics of the at least first and second temperature values, while these first and second temperature values associated with at least first and second time values, and determining the delay may contain the analysis of the characteristics of temperature between at least first and second time values based on the temperature lag, derivatives, and square or any combination of these parameters.

Temperature response caused by the output signal of the lighting system may lead to a change between at least first and second temperature values in an environment with controlled temperature. The temperature response can be interpreted as the set of temperature values as a function of time elapsed from the instant change of the output signal of the lighting system, where each temperature value associated with a time value. Each of the temperature values and time values form the set temperature characteristics response and describes the delay from the time instant of change of the output signal light. Collectively the th environment creates a unique set of temperature characteristics. The result of the determination of the temperature lag, square, derivatives, maximum delay or the maximum duration of the temperature characteristics is that it is possible to accurately determine the control parameters of the control system and to change them in accordance with the new environmental conditions. When in future you may experience temperature changes, it is possible to predict the output signal of the lighting system adapted for managing parameters and to achieve precise temperature control. The temperature hysteresis can be interpreted as the part temperature characteristics, where temperature changes occur within the threshold interval. The value of temperature lag can be influenced by environmental factors. Therefore, by determining the temperature lag, it is possible to consider the impact of environmental factors.

In embodiments implementing the present invention, the temperature control can be to maintain the temperature within at least the first threshold value. You can define the upper threshold and lower threshold. Driving the output signal of the lighting system, it is possible to maintain the temperature within the threshold values of the temperature.

In embodiments of the present invention adaptive upravlinnyamagistral may include critically damped or preemptively algorithm or any combination of them. When the control output signal lighting system it is preferable that the control system was critically damped, since this implies that in the temperature response will not move beyond the established limits. All environmental factors individually affect the environment with controlled temperature and, consequently, to the control system. Although some variables, such as ambient temperature can change quite slowly, all of the input variables together can lead to significant changes and should be compensated. A variable which can change rapidly when it is in an environment with controlled temperature add elements from other thermal characteristics, for example, during a replenishment at refrigerated counter, as the bulk of the inside of the refrigerating counter changes dramatically within a relatively short period of time. The increase in the mass means a slower system response and, therefore, the system during this process is supercritical damped. Incremental fetch items can put the system into a state of critical damping. The control system may be minimally supercritical damped, so the slight fluctuations in environmental conditions, for example caused by removing the subject is and from the environment with controlled temperature, not lead to a transition temperature threshold. Significant preemptively can be avoided, because this may limit the range of external conditions in which adaptive temperature control will provide sufficient regulation within the temperature threshold. Temperature control preemptively system may be slower in comparison with the temperature control is critically damped control system.

In embodiments implementing the present invention, the values can be recorded for subsequent reading. In embodiments implementing the present invention, the values can be registered when the threshold temperature. Saving values when the upper or lower threshold was exceeded, it is possible retrospectively to determine the conditions for such event of excess temperature.

In embodiments implementing the present invention, the values may be the values of temperature, time, date, or any combinations thereof. When time and date are saved whenever the temperature, you can restore the temperature history and to determine when the temperature raised. These data can be used as evidence of good work and proof that the products were stored at the required temperature is round.

In embodiments of the present invention logged values can be encrypted. Encryption of registered values, you can prevent any unauthorized change. The encryption method may include the use of digital encryption key. This can be important if the environment with controlled temperature is subject to legislative regulation. For example, if the values represent events exceeding the threshold temperature, the encryption values can ensure that legal requirements were met.

In embodiments implementing the present invention logged values can be decoded to read. Only allow authorized reading, because for extracting data values requires deciphering. Values can be passed over a secure line of communications, such as communications on the protected network. You can monitor a variety of environments with controlled temperature, since the encrypted values of temperature, time and date can be encrypted in a secure communication line or get through descramble device having access to the encryption key.

According to the second aspect of the present invention proposes a device in the form of a control system for an environment with controlled temperature, is within the lighting system, containing the sensor located near the housing environment with controlled temperature and with the ability to control the lighting system in which the output signal of the lighting system causes the temperature response in an environment with controlled temperature. The temperature response is detected by the sensor. The control system is designed with the ability to adjust the temperature adaptive, based on the output signal of the lighting system and associated temperature response.

In embodiments of the present invention, the cover may contain a shelf in an environment with controlled temperature, in which the sensor is in thermally conductive connection with the shelf. Due to the heat-conductive contact with the shelf or any other element in contact with an environment with controlled temperature, it is possible to accurately detect the temperature response, which allows to improve temperature control.

In embodiments implementing the present invention, the sensor can be installed within a predetermined threshold distance from the lighting system. If the sensor is too far from lighting, objects or elements that are closer to the lighting system may be subjected to a temperature exceeding the threshold temperature, because the temperature response is determined away from items elelements. This threshold distance may be set when the temperature is outside of a threshold distance to be maintained within the limits of the threshold.

In embodiments implementing the present invention, the lighting system may include at least one light source having at least one light emitting diode. In the lighting system, you can use light sources of different types. Predominant are any light sources that conduct heat, not emit it, such as light-emitting diodes.

In embodiments implementing the present invention, the control system may include a storage device, which records the values for further reading.

In embodiments implementing the present invention, the storage device is configured to register values when the threshold temperature.

In embodiments implementing the present invention, the values can be values of temperature, time, date, or any combinations thereof.

In embodiments implementing the present invention, the control system may include an encryption module to encrypt the registered values.

In embodiments implementing the present invention, the control system may include a decryption module to decrypt C is registered values to read.

Typically, the second aspect of the present invention has the same advantages as the first aspect.

Signs of the second aspect may also be contained in the first aspect, and the signs of the first aspect may also be contained in the second aspect.

These and other aspects of the present invention will be clear from the following description. As a rule, all terms used in the claims, should be interpreted in their ordinary meaning in the technical field, if the description is not explicitly given a different definition. All references to a/mentioned (element, device, component, means, step, etc) should be interpreted openly as indicating the presence of at least one such element, device, component, means, step, etc, unless expressly stated otherwise. The steps of any of the described method need not be performed exactly in the specified order, unless expressly agreed otherwise.

Brief description of drawings

Other characteristics and advantages of the present invention will be apparent from the following description of the preferred in the present variant, with reference to the attached drawings, where:

Figure 1 - example of a control system of the present invention to control the lighting system.

Figure 2 - example output of the lighting system and the associated t is mperatures response.

Figure 3 - example of control of the lighting system on the basis of the output signal of the lighting system and the associated temperature response.

Figure 4 is another example of the control of lighting systems on the basis of the output signal of the lighting system and the associated temperature response.

Detailed description of the invention

What follows is a more detailed description of the present invention with reference to the attached drawings showing some variants of the present invention. This invention, however, may be embodied in other forms and the description should not be construed as limited to the above options. These options are shown for example only for the sake of completeness and in order to specialists was clear scope of the invention. In the drawings the same position indicate the same elements.

Essentially the present invention relates to a method of controlling a lighting system in an environment with controlled temperature and, optionally, to a control system for an environment that contains a lighting system.

Figure 1 shows a schematic drawing of a variant of implementation of the present invention, which shows a system 100 of the control containing the Central processor 101 coupled to the sensor 102 temperature and pathogen 104 for controlling the supply of PI to the project system 3 lighting. The CPU 101 may send control signals to the exciter 104, for example a signal with pulse-width modulation, which may force the agent 104 to change the output signal of the system 103 lighting, for example to reduce or increase the light intensity. System 103 lighting can contain a module of light-emitting diodes or any other means for supplying light to medium 105 at a controlled temperature. The sensor 102 is installed next to the environment 105 with controlled temperature and may be located adjacent to the casing 109, the surrounding environment 105 at a controlled temperature. Output signal system 103 lighting leads to temperature response in environment 105 at a controlled temperature, which is detected by the sensor 102. Output signal system 103 lighting can be interpreted as the intensity of light, the wavelength of light or any other output of the lighting system, which can lead to an increase or decrease in ambient temperature. The CPU 101 controls the output signal of the system 103 lighting and accepts the associated temperature data from the sensor 102, which represent the temperature response. The temperature response is unique to environmental factors in the environment 105 at a controlled temperature. The control signal sent to the agent 104, adapted on the basis of the Association is europanova response. Output signal system 103 lighting is controlled in accordance with an adapted control signal to regulate the ambient temperature.

The sensor 102 is in thermal connection 106 with any element that affects the environment 105 at a controlled temperature, for example with shelf 110, which may be part of the casing 109. If thermal coupling is conductive, which ensures good heat transfer between the sensor 102 and a shelf 110. Shelf 110 may support or be in thermal contact with other objects that are affected environment 105 at a controlled temperature. Thermal compound affects the temperature response caused by the output signal of the system 103 lighting.

The temperature response is also affected by the distance between the system 103 lighting and sensor 102 temperature. The sensor 102 is installed on a threshold distance from the system 103 lighting or heat source to achieve a good connection between the heat source and the sensor 102 and to avoid that the temperature-sensitive elements would be closer to the heat source than the sensor 102, with the result that they can have a temperature different from that detected by the sensor 102. If you want a specific threshold distance can be calibrated to account for this temperature difference.

The EU and system 103 lighting contains many light sources, having at least one light emitting diode, each light source may have a corresponding sensor 102. The output signal of each light source or light emitting diode can be controlled respectively and the temperature can be adjusted near the position of each of the light sources or light emitting diodes. The management system 100 includes a storage device 107, which is connected with the Central processor 101 and the temperature sensor 102. The storage device 107 registers the data or the values accepted by the CPU 101. The time at which the event occurred, is determined by the clock 112 real-time. Watch 112 real-time equipped with a backup battery that provides work hours, even when powered off. The stored values can be read during subsequent analysis of the conditions in the environment 105 with adjustable temperature. The storage device can register value upon the occurrence of predetermined events, for example when exceeding the threshold temperature. The storage device 107 registers values when the temperature either exceeds the upper threshold or falls below the lower threshold. Registered values can be temperature, time, date, setting lighting, such as intensity, wavelength or current of the exciter, power and the and the value of the control signal of the pathogen, or any other parameter used to control the lighting system or describing conditions in an environment with controlled temperature. Control system 100 includes a module 111 encryption to encrypt the values recorded in the storage device 107, and the module 111 decryption to decrypt encrypted values. System 100 contains a control module 108 notifications, such as light emitting diode or any optical, acoustic or electrical signal notification on occurrence of a parameter, such as temperature, greater than some threshold value.

Figure 2 shows an example of the output signal 201 of the lighting system and the associated temperature response 202, as a function of time (tfor adaptive temperature control system 100 controls. The base temperature 204, measured without the influence of the lighting system corresponds to zero output signal 203. The initial temperature response 206 is a result of the initial output signal 205 of the lighting system corresponding to the initial value of the parameter lighting. Parameter lighting can be current or voltage supplied to the lighting system, or it can be interpreted as the intensity of illumination, consumption of energy or thermal energy emitted by the lighting system, the wavelength of light or any others is another option influencing the temperature and on the environment surrounding the lighting system.

Change the lighting option with the first value 208 on the second value 209 causes the temperature response in the form of temperature changes from the first value 215 on the second value 216 temperature. You can determine the delay 207 response. The delay is the result of environmental factors influencing the space between the lighting system and the temperature sensor, for example, elements having different thermal characteristics, which cause a different rate of heating or cooling elements in an environment with controlled temperature. The change between the first value 208 on the second value 209 the lighting option at the time 210 of time can happen in the interval that cannot be perceived with the naked eye, such as changes in the intensity set at 10%. This prevents you from flashing lights. The first value 208 of the lighting option may be higher or lower than the second value 209. As shown in figure 2, if the output signal is changed, passing from the level of the second value 209 on the level of the first value 208, there is a second temperature response again, it is possible to determine the delay of this response. Point 211 in time at which the output signal is changed again, might correspond to the time of detection of the second value 216 temperature at kataraistentie temperature can occur in a specified threshold interval. When the temperature changes insignificantly within the threshold interval, the response can be defined, when the temperature changes from the first value 215 on the second value 216, and initiated a new instantaneous change in the output signal.

Temperature response contains the temperature characteristic of the at least first 215 and 216 of the second temperature values, at least the first 215 and 216 second temperature values associated with the first 210 and 211 second time values. The temperature response can have a temperature characteristic, comprising a set of temperature values as a function of time that has elapsed since the instant of the measurement parameter of the output signal at the time 210 of time. Each of the values of the temperature and time creates a set temperature characteristics response and describes the delay from the instant of change of the output signal light. The definition of delay 207 may contain the analysis of the temperature characteristics for the associated time values, such as temperature lag 217, derivative, area, peak latency, and duration.

The change of the output signal is repeated at intervals 214 of time separating the first change between the value 208 and the second value 209 parameter lighting, from the second difference between the third value 220 is the fourth value 221 of the lighting option. The second change of the output signal at point 212 of time causes the temperature response between the first 222 and 223 second temperature values and associated delay 219, which may be different from the delay 207 due to changes of environmental factors. Temperature lag 217 or 218, respectively, may differ from the temperature lag 224. The control system 100 according to the variant of figure 1 adapts the output signal of the lighting system to a new temperature response with an associated delay for temperature control during the subsequent time interval, as will be described below with reference to figure 3.

Figure 3 shows an example of control of the lighting systems on the basis of the output signal of the lighting system and the corresponding temperature response. Environmental factors lead to changes in the basic temperature 301, the influence of the lighting systems on the overall temperature is subtracted. The value of 302 total temperature is the temperature measured by the sensor, the temperature influence 303 of the lighting system can be determined. Next, determine the threshold value 304 temperature. Temperature response and its associated delay determined in accordance with the example of figure 2, can be used to predict the temperature response caused facto the AMI environment, so, in order to determine the adapted threshold value 308, at which the output signal of the lighting system changes in the time interval between the first point 305 time and the second moment 307 time. Figure 3 temperature 313 without the adapted output signal of the lighting system is changed to the low temperature 306, when the influence of the lighting system is reduced due to reduction of its output signal between the first point 305 time and the second moment 307 time corresponding to the change from a first parameter value of the lighting on the second value of the lighting. Low temperature 306 does not exceed the temperature threshold 304. The change of the output signal can be contained in a range of different values of illumination defined by the temperature response and the associated delay in accordance with the example of figure 2 to control the temperature so that it remains below the threshold value.

Adaptive temperature control can be critically damped or preemptively. For example, the temperature response and its associated delay can be input into the algorithm of the PID control system 100 controls, which can be critically damped or preemptively.

In the time interval between the second point 307 and the third is m moment 309 external factors may change. Temperature response and its associated delay 219 defined after changing any of the environmental factors, according to the example of figure 2, are used to predict the temperature response caused by the new external factors, in the scenario shown in figure 3, and it is possible to determine the new adjusted threshold 311. Adapted threshold 311 can be interpreted as the threshold at which the control system starts to adapt the output signal of the lighting system. If necessary may also be possible to adapt the output signal continuously throughout the period of control from zero time to avoid exceeding the temperature threshold 304, particularly if the base temperature 301 is maintained at a level close to the temperature threshold 304. The output signal of the lighting system changes in the time interval between the third time 309 time and the fourth time 310 of time and a lower temperature 312 corresponding temperature response can be maintained below the temperature threshold 304. The time interval during which the control system determines the delay that may contain the analysis of the temperature lag, derivatives, peak area, peak duration and peak delay or any other characteristic temperatures of the CSO response may correspond to a time interval during which the change in environmental factors.

Figure 4 shows an example of controlling the lighting system on the basis of the output signal of the lighting system and the associated temperature response. When the output signal of the lighting system changes in the time interval between the first point 405 of time and the second time 407 time, the overall temperature of 402 is changed to low temperature 406. Low temperature 406 is maintained within the temperature threshold 404. Between the second moment 407 time and the third time 409-time environmental factors lead to a rise in temperature, and is found at low temperatures 408, because the output of the lighting system is reduced by the control system. However, due to external circumstances, the base temperature of 401 exceeds the temperature threshold 404 without affecting the lighting system. The date and time of the event threshold register in the storage device of the control system and encrypt, or, if there are legislative provisions for temperature limitations. In this case, reading the stored data will require decryption.

Although the present invention has been described in connection with specific variants of implementation, it should be understood that the specialists in this region the STI technique can make various changes, conversions and improvement, not beyond the stated scope of protection.

1. The way management system (103) lighting in the environment (105) with controlled temperature, comprising stages, which are:
changes the output signal (201) of the lighting system;
find the associated temperature response in the mentioned environment with controlled temperature by a sensor (106);
define delay (207, 219), associated with a temperature control, on the basis of the detected temperature response; and
regulate the output signal of the lighting system based on the temperature in the above-mentioned environment with controlled temperature and delays associated with temperature control.

2. The method according to claim 1, wherein the output signal includes a change between the first value (208, 220) and a second value, (209, 211) the lighting option.

3. The method according to claim 2, in which the output signal includes at least first and second changes, separated by a predefined time interval (214).

4. The method according to claim 1, in which the temperature response contains at least the first (215, 222) and second (216, 223) temperature values, at least first and second temperature values associated at least with the first (210, 212) and second (211, 213) times, and the stage on which determines what ederico, includes the stages at which analyze the temperature between at least first and second time values based on the temperature lag (217, 224), derivatives and square or any combination thereof.

5. The method according to claim 1, wherein the temperature control includes maintaining a temperature below at least the first threshold values (304, 404).

6. The method according to claim 1, in which the adaptive temperature control includes critically damped, preemptively control algorithm, or any combination of them.

7. The method according to claim 1, in which the values recorded for further reading.

8. The method according to claim 7, in which the values recorded in the threshold temperature.

9. The system (100) control environment (105) at a controlled temperature, which has a system (103) lighting, contains a sensor (102), located near the cover (109) environment with controlled temperature and with the ability to control the lighting system, the control system is configured to:
to change the output signal (201) of the lighting system;
discover the associated temperature response (202) in the above-mentioned environment with controlled temperature by a sensor;
to determine the delay (207, 219), associated with a temperature control on the basis of obnarujennogo the temperature response; and
to control the output signal of the lighting system based on the temperature in the above-mentioned environment with controlled temperature and delays associated with temperature control.

10. The control system according to claim 9, in which the casing includes a shelf (110), which affects the environment with controlled temperature, in which the sensor is in heat-conducting connection (106) with a shelf.

11. The system according to claim 9, in which the sensor is set to a predetermined threshold distance from the lighting system.

12. The system according to claim 9, in which the lighting system includes at least one light source having at least one light emitting diode.

13. The system according to claim 9, further containing a storage device (107), which records the values for further reading.

14. The system of item 13, in which the storage unit is configured to register values exceeding a threshold temperature.