The device for preliminary determination of seed germination

 

(57) Abstract:

Usage: control and measuring equipment, including stationary and portable devices for digital conversion of measured parameters in pre-determining the germination of vegetable seeds. The invention is: to improve the accuracy of the device for preliminary determination of seed germination, the latter consists of two measuring paths and path analysis and display of results. The first measuring path includes the following devices: non-linear sensor, the pulse generator and the reference frequency calibrator pulses. The second path includes: a non-linear sensor, an operational amplifier and analog-to-digital Converter. Each of the paths converts varying input analog value binary digital code. The first tract converts the measured value of capacitance, the second is the change in current. Digital binary information with the measuring paths arrives at the inputs of path analysis and display of results. 2 Il.

The invention relates to the control and measurement technology, is intended for use in stationary and portable devices is inogo determine the germination of vegetable seeds.

The prior art was determined by the patent and technical literature.

In the patent literature (see U.S. Patent N 3852914,M CL3And 01 1/00, 1974 Patent Germany N 2443961,M CL3And 01 1/00, 1976, French Patent N 2284267, M CL3A 01 With 1/02, 1976) well-known methods for determining the viability of seeds. Methods based on measuring the magnitude of current passing through the seed, which is taken as a measure of viability.

The disadvantages of the known methods and devices implemented based on them, are their inaccuracy and poor performance. The inaccuracy is due to the fact that in order to determine the percentage of germination of the seeds, you must use a conversion table value current percentage of germination. For each type of culture used their table. The value of the current depends on the moisture content of the seeds at the stage of preliminary germination and on the type of culture. The presence of moisture in the seeds distorts the real percentage of their germination (about 1.3 to 1.7 in 10% of reading). In addition, these methods focus on determining germination (viability) of a single seed that characterizes their poor performance.

You know Uste AC sinusoidal electric current of low frequency, the control unit amplitude transformer, the electroluminescent device for rendering the oscillator.

The disadvantages of the known devices are low productivity and lack of display of quantitative figures in the process of determining the viability of seeds. These disadvantages result from constructive solutions and methods for determining viability of the seeds. The method includes the following main stages: sampling of seeds and count the number of seeds, transferring and placing the sample into the device, preparing to study, conduct research, and visual counting the number of viable seeds. T. O. to determine the percentage of germination of seeds necessary to conduct a number of operations time-consuming and which increases with decreasing size of the seed.

The closest in technical essence to the claimed is a device (see application N 4748791/24, CL G 06 F 7/26, filing date 07.08.89 g) containing a non-linear sensor, the pulse generator, the generator frequency reference calibrator pulses, a mixer, a frequency Converter in voltage, the voltage Converter into the container, the adder, the first input connection of the output to the first input of the mixer, the second input is connected to the generator output frequency reference and output through the calibrator pulses, the frequency Converter into a voltage and the voltage Converter in a container connected to the second input of the adder.

The disadvantage of the prototype is that based on the proposed technical solution, the device has a dual conversion (capacity voltage capacity) and almost completely sold on the analog elements. The operation of the analog elements is accompanied by oscillation or "ringing". This "ring" is formed relative to the Cabinet bus inductance and parasitic capacitance, which create in semiconductor devices oscillatory circuits excited by pulse signals in the circuit. All these obstacles affect the accuracy of measurements. Based on the technical decisions made device-hygrometer pumpkin seeds (vegetable) crops AS A.844.608. In this device the absolute measurement error is 1% in the measuring range of up to 10% and increases to 4% in the measuring range of up to 50% moisture (E.844.608 PS).

The technical result which directed the invention is to improve the accuracy of the device prior to the Oia technical result is determined by in a device containing a non-linear sensor, the pulse generator, the calibrator pulses, the reference frequency generator, the first output of which is connected to the counting input of the calibrator pulses, the reset input of which is connected to the output of the pulse generator, whose input is connected to the first output of the nonlinear sensor, introduced precision operational amplifier (op-amp), analog-to-digital Converter (ADC), arithmetical and logic unit (ALU), a display unit, the input of which is connected to the output of the ALU, the first and second inputs which are connected respectively to the outputs of the calibrator pulses and ADC, the inlet of which is connected to the output precision of the shelter, whose input is connected to the second output of the nonlinear sensor, the clock input of the ALU is connected to the second generator output reference frequency, the first input connected to a clock input of the ADC.

The essential features that distinguish the proposed device for the preliminary determination of seed germination from the prototype consist in the introduction of precision OS, ADC, ALU and display unit.

The introduction of these features allows you to ensure the required accuracy of the device for preliminary determination of seed germination (absolute pogrebleniya compared with the prototype are when increasing the accuracy of determining the rate of seed germination can be quite guaranteed and accurately set the price of the seeds in their implementation. In addition, the use of portable devices, visibility, and short measurement time provide simplicity and high performance.

The block diagram of the device for preliminary determination of seed germination is shown in Fig.1; structural diagram of the ALU is shown in Fig.2.

The device for preliminary determination of seed germination (Fig.1) contains a non-linear sensor 1, the pulse generator 2, the calibrator pulse 3, the reference frequency generator 4, the precision of the shelter.5, the ADC 6, ALU 7, the display unit 8, an input connected to the output of the ALU 7, the first and second inputs which are connected respectively to the outputs of the calibrator pulses 3 and ADC 6, the inlet of which is connected to the output precision OS 5, the inlet of which is connected to the second output of the nonlinear sensor 1, the first output of which is connected to the input of the pulse generator 2, the output of which is connected to the reset input of the calibrator pulse 3, a counting input connected to a clock input ADC 6 and connected to the first generator output frequency reference 4, the second output of which is under the ALU 7 (Fig.2) includes port data exchange 9, the multiplexer 10, a switch 11, a persistent storage device (ROM) 12 and a microprocessor (MP) 13, a data bus and output "write/read" which are connected respectively to the data bus and control input port data exchange 9, and the address bus connected to the address bus of the ROM 12 and the multiplexer 10, the first group of inputs of which are connected to the outputs of the switch 11, the second group of inputs connected to the outputs of the ROM 12, the third and the fourth group of inputs connected respectively to first and second inputs of the ALU 7, the output of which is connected to the data outputs of the port data exchange 9, the data inputs of which are connected to the data outputs of the multiplexer 10, the clock input of the ALU 7 is connected to the clock input of the MP 13.

The device for preliminary determination of seed germination consists of two measuring paths and path analysis and display of results. The first measuring path includes the following devices: non-linear sensor, the pulse generator and the reference frequency calibrator pulses. The second path includes: a non-linear sensor, precision OS and ADC. Each of the paths converts varying input analog value binary digital code. The first tract converts the value changed the inputs, path analysis and display of the ALU and the display unit.

The device operates as follows. The amount of nonlinear sensor 1 (Fig. 1) is filled with the prepared puncture seeds. Preparation of seeds is their soaking and germination phase is not achieved. After turning on the power supply unit (not part of invention), which delivers a supply voltage of 6V for the OS and +5V for the digital elements of the device, the mounting plate 13 (Fig.2) begins to operate under the control firmware stored in its RAM. On the address bus set address "00" followed by the signal "read" (log.0 output "write/read"). At this address multiplexer 10 transmits the first group of inputs of the binary code value set by the switch 11. This value through the port data exchange 9 goes into register DE MP 13. After that, the device moves to the first stage of the measurement.

The nonlinear part of the sensor 1, operating on the principle of variable resistor that changes under the action placed samples of seeds of its resistance and, accordingly, changes the amount of current in the circuit. This current is converted precision OS 5 (Fig.1) in the corresponding voltage, which is fed to the ADC input 6. ADC 6 to the clock input of clocked pulses from the first output of the generator ary code is supplied to the second input of the ALU 7 and is transmitted to the fourth group of inputs of the multiplexer 10 (Fig.2). MP-13 put on the address bus the address "10" and the signal "read" output "read/write". The multiplexer 10 translates the binary code value with the fourth group of inputs to the input data port data exchange 9 and the register BL MP 13. After that, the device moves to the second stage of the measurement.

The nonlinear part of the sensor 1, operating on the principle of the variable capacitor changes under the action of the placed sample of seed capacity. The pulse generator 2 (Fig.1), performed by the circuit of the multivibrator produces pulses of a certain duration and frequency. The pulses from the output of the generator 2 is coming to the reset input of the calibrator pulses 3. At the counting input and the input resolution of the calibrator pulses 3 receives the pulses from the first and third outputs of the reference frequency generator 4. Calibrator pulses 3 performs the calculation of a highly stable pulse counting input and the signal log.1 input "resolution" sets the binary value at its output. Frequency by counting the input of the calibrator pulses 3 allows you to accurately track changes in the frequency at the input of the pulse generator 2. From the output of the calibrator pulses 3 a binary code value is supplied to the first input of the ALU 7 and transmitted to the third g is AET binary code with the third group of inputs to the input port data exchange 9. Port data exchange 9 the signal "read" output "write/read" this value is entered in the register NR MP 13.

After appearing in the register BL MP 13 binary code obtained by the first stage of the measurement, MP 13 performs communication through the port data exchange 9 and the multiplexer 10 to the second group of inputs from the ROM 12. Addressing the ROM 12 is a billing address "11" on the address bus and is accompanied by a signal "read" (log.0) output "write/read" MP 13. ROM 12 contains multiple tables of binary codes, respectively, the number of positions of the switch 11 or the number of species of seed to which this device can be pre-determined germination. MP 13 refers to the corresponding table in the ROM 12 to the code stored in register DL and reads the table code from the ROM 12 in register BL MP 13. Similarly selects the amendments in the relevant table in the ROM 12 on the basis of the second stage of measurements. Read code is placed in register NR MP 13. Next is the logical addition of the content of register BL and BH and the result port data exchange 9 is transmitted to the display unit 8. The bus address is set to the address "00" followed by the signal write (log.1 nesticidae values are in the range from 10 to 100 gradation readings 0,5%

Frequency of change of the values displayed in the display unit 8 is 5 Hz. When clocking MP 13 frequency of 10 MHz, the time required for processing the code values of the registers 13 MP, does not cover the time display. To exclude the likelihood of false results stored in the registers 13 MP code values are checked for compliance with a legal value which is also located in the corresponding region of the ROM 12.

Power supply device for the preliminary determination of seed germination is carried out either through the unit from the AC power supply 220 V, or from two built-in sources of DC voltage of 9 Century

The device for preliminary determination of seed germination is a simple technical implementation on the basis of serial parts and integrated circuits (IC): the pulse generator 2 is performed on the IC CMES and discrete RC-elements, calibrator pulses 3 IC KM IE, the reference frequency generator 4 is performed on the IC CM N1, KTM and CMIE, RC-elements and the quartz resonator, precision OS 5 on the IC WD, ADC 6 on the IC UD and CPU, port data exchange 9 IC K555AP6, the multiplexer 10 and the IC KMOK, as the switch 11 is of microprecipitates who are moved prepared for research seeds, is a hollow parallelepiped constructed from a sheet of foil fiberglass. The internal volume of the parallelepiped is divided into two vertical parts: the upper part forms a capacitor, the lower resistor. Set the device to predict seed germination, implemented on integral elements of the proposed technical solution, it is simple and does not require their selection (in contrast to the prototype). The device has the option of extension. The option provides for a connection to port data exchange, which provides communication with the display unit, the interface of the personal computer type ES or IBM RS. In addition, it is possible to replace the ICS ROM that is installed in the pad on the PCB. This will increase the number of kinds of seed for which is determined by germination.

The device for preliminary determination of germination of seeds containing capacitive and resistive sensor, a pulse generator, a calibrator, a reference frequency generator, the first output of which is connected to the counting input of the calibrator pulses, the reset input of which is connected to the output of the pulse generator, whose input is connected to the first output of the capacitive and resistive sensor, atletetico logical device and the display unit, the inlet of which is connected to the output of the arithmetical and logical unit, the first and second inputs of the latter are connected respectively to the outputs of the calibrator pulse and analog-to-digital Converter, whose input is connected to the output precision operational amplifier, whose input is connected to the second output of the capacitive and resistive sensor, a clock input arithmetical-logical unit connected to the second generator output reference frequency, the first input connected to a clock input of the analog-to-digital Converter.

 

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