Device and method of determining liquid cargo weight

FIELD: physics.

SUBSTANCE: method of determining liquid cargo weight in railway tanks consists in measuring liquid cargo level by thermovision image of tank lateral surface and calculating cargo volume and weight. It differs from known methods in that, natural sheet or shipping documents for the tank are used to determine tank type, declared cargo type and weight. Tank lateral surface part thermovision fragment corresponding to filled tank section is used to determine filled cargo temperature, and liquid cargo weight is calculated with due allowance for declared type and specific weight at measured temperature and tank type. Tank is weighed to subtract empty tank weight from measured weight to determine actual weight of liquid cargo. Now, said weight is compared with declared weight to conclude on commercial safety of cargo.

EFFECT: higher validity of cargo commercial safety control.

2 cl, 1 dwg

 

The present invention relates to methods and means of control of commercial cargo by railway transport. More specifically, the claimed technical solution is intended for remote control of the occupancy of the tank liquid bulk cargo and determining the weight of the specified load on the movable rail transport.

There is a method for remote monitoring of cargo on the railway [1], which consists of a visual examination of rolling stock and characterized in that during its implementation at the entrance to the Park arriving rolling stock moving in the field of view of the cameras and produce a continuous image recording composition, recognize deviations of the observed image composition from the initial state by comparison with a reference sample obtained in the Park of departure in the video rolling in identical conditions and transferred to the Park prior to your arrival of controlled composition.

The disadvantage of this method is that its implementation compares the external surfaces of the rolling stock, do not carry information about the level of occupancy load. In particular, this method does not allow to determine the filling level of the tank liquid bulk cargo, based on the level specified is the weight of the specified load, and to compare chislennogo weight with its stated in the accompanying documents of value.

Information about the level of loading of the cargo in the tank can be obtained on a moving train on a thermal image-side surface of the tank, obtained using thermal observation devices [2].

There is a method of determining the mass of the cargo contained in the vessel [3], namely, that receive thermal image-side surface of the tank, identify the specified image by comparing the contour image of the tank, with its vast database image, thermal image detect the fill level of the tank, compare it with the desired, and then judge available commercial marriage, with each image frame highlight the part of the image of one frame, covering the object vertically, summarize the levels of brightness of dark and light elements (pixels) each row in the raster of thermal image belonging to the image of the object, represent the amount of brightness in the form of a graph whose vertical coordinate is the vertical edge of the frame, and the horizontal total brightness, lay a large scale is the maximum brightness for each horizontal row corresponding to the image of the examined object on the above graph, connecting the extreme points, build hodograph, mark the point PE is agiba and consider it as the boundary of the level of bulk cargo.

The discussed method has several disadvantages, which include:

- inability to determine fill level when the tank is nearly full or nearly completely empty, as in this case, the interface becomes indistinct;

- following from the above drawback, the complexity of identifying the tank as empty (or almost empty) or as a full (or almost full);

- the possibility of error when determining commercial cargo even when matching the desired and actual levels of loading, as when committing theft of the tank can be refilled with other, cheaper and has a different specific gravity bulk liquids (for example, instead of a relatively expensive and light gasoline may be filled to the same level of cheaper and more heavy fuel oil).

Object of the present invention is to eliminate the discussed disadvantages, namely improving the reliability of operation of the control of commercial preservation of bulk cargo.

The problem is solved as follows.

To determine the mass of liquid cargo in tanks of railway rolling stock for imaging the image of the tank is proposed a method consisting in measuring the level of liquid cargo for imaging the image side on top of the barb tank, calculating the volume of bulk cargo and its mass, according to results of field sheet or according to the accompanying documents on the tank, determine the type of tank, the declared type and weight of bulk cargo, the fragment imaging portion of the side surface of the tank relative to its filled with liquid bulk cargo part, determine the temperature of the liquid cargo, calculate the mass of liquid cargo in view of its declared type, specific gravity measured at a given temperature and type of tank, weigh the tank, subtract from the received weight empty weight of the tank, given its type, define thus the actual mass of bulk cargo, after which the specified the weight is compared with the declared weight of bulk cargo and by comparing the results conclude commercial cargo.

In addition, the applicant proposed a device for the implementation of this method, containing thermal imaging surveillance device, which is moved tanks rolling stock, and monitor with the possibility of monitoring thermal image on the screen, characterized in that it further comprises an electronic scale to measure the weight of the tank, a device for determining the fill level of the cargo in the tank, the unit determining the temperature of liquid cargo on thermal imaging is the images of tanks, unit type tank associated with the device calculate the volume of bulk cargo, unit cargo associated with the device calculate the mass of bulk cargo, the comparator and the display device information on the status of cargo, while the output of thermal imaging surveillance device connected to the input unit determining the temperature of liquid cargo, the output of the device determine the level of loading of the cargo in the tank through the serial connected device calculate the volume of bulk cargo, the device calculate mass loading of cargo associated with the access unit determining the temperature of liquid cargo, and a comparator connected to the display device information on the status of cargo, while the free input of the comparator coupled to the output block subtracting the entrance of reducing input of which is connected to the output of electronic scales, and the input of the input wichitaeagle - with the output of the unit type of the tank.

Diagram of the device shown in the drawing.

The inventive device includes a thermal imaging surveillance device 1, which is moved tanks rolling stock, and the monitor 2 with the possibility of monitoring a thermal image on its screen, electronic scales 3 to measure the weight of the tank, the device 4 to determine the level of loading of the cargo in the tank on its thermal image unit 5 definition is of the temperature of liquid cargo for a thermal image of the tank, unit 6 type tanks associated with the device 7 calculate the volume of bulk cargo, unit cargo 8, associated with the device calculate the mass of liquid cargo 9, a comparator 10, the display device information 11 about the condition of the goods and the subtraction unit 12, and the output imaging device 1 is connected to the input device 4 to determine the level of loading of the cargo in the tank and block 5 determine the temperature of the liquid cargo, the output device 4 to determine the level of loading of the cargo in the tank through the serial connected device 7 calculate the volume of bulk cargo, the device 9 calculate mass loading of cargo associated with the output unit 5 definition temperature bulk cargo, and the comparator 10 is connected to the device 11 to display information about the status of cargo, while the free input of the comparator 10 is connected to the output of the subtraction unit 12, the input of reducing input of which is connected to the output of electronic scales 3 and the input of the input wichitaeagle - with the output of the unit 6 types of tanks.

The device can be implemented as follows. Thermal imaging device 1 can be implemented on the basis of the microbolometric matrix UL 01011 company ULIS (France). As monitor 3 you can use a standard TV monitor displays based on cathode-ray tube. As electronic scales 3 you can use CE the applications of electronic scales, used on the railroad. In addition, electronic scales can be implemented on the basis of the piece of elastic rail, equipped with a load cell and a block decoder. The device 4 to determine the level of loading of the cargo in the tank may be implemented on a PC with corresponding software. In particular, can be used elements in a typical software program complex Imaging system for remote control of the load rolling stock 643. FCNP-01", developed PC NPC "AUTOMATION". Unit 5 determine the temperature of the bulk cargo can be implemented based on PC with software for automatic processing of thermal images. In particular, can be used elements of the above-mentioned standard software. As the knobs 6 and 8 can be used PCs with keyboards, memory blocks which are geometric characteristics of different types of tanks and relative weight of different types of bulk cargoes at different temperatures (in relation to the territory of the Russian Federation in the range from minus 50 to +80°C). The computing unit volume 7 can be implemented on a PC using the volume calculation based on a specified fill level. In addition, the evaluation unit of volume 7 can be implemented with ispolzovaniem nonlinearity bn-31 analog computing machine AVK-2/3. The device calculate the mass of liquid cargo 9 can be implemented based on PC, or on the basis of block multiplication implemented on the analog chip PC, but in this case you will need the use of DAC and ADC. The comparator 10 and the subtraction unit 12 can also be implemented on the PC. Device information display 11 can be implemented on the basis of discharge or LCD display.

When the purpose of the invention, the device operates as follows. Aiming to train a thermal imaging device 1 generates a video signal corresponding to the temperature distribution in his field of vision. In this case, since the optical axis of the imaging device is oriented to the side surface of the tank to thermal image formed on the screen of the monitor 2 displays the image side surface of the tank with a visible image of the boundary loading. The device 4 to determine the level of loading of the cargo identifies the boundary of the bulk. The operator, on the basis of supporting documents, determines the type of tank and using the unit type tank enters the geometrical characteristics of the tank in the device 7 calculate the volume of bulk cargo, which with the use of these characteristics and the input device 4 to determine the level of loading of the cargo of vechicle the raised volume of bulk cargo in the tank. In block 5 determine the temperature of the liquid cargo in the amplitude of the video signal corresponding to the filled part of the tank is determined by the temperature of the liquid cargo. The operator, on the basis of supporting documents, determines the type of goods (gasoline, kerosene, oil, acid etc) and unit cargo 8 introduces it into the device (9) calculate the mass of bulk cargo. In the device 9 calculate mass loading of cargo, based on the volume of the cargo, its known density if determined in block 5 temperature calculated weight of the cargo.

In parallel with the above-described processes determine the cargo weight is weighing tank on electronic scales 3, from which the weight value is supplied to the subtraction unit 12. Using input from the unit type tank 6 weight empty tank in the subtraction unit 12 is determined by the net weight of liquid cargo in the comparator 10 is compared with the estimated weight of the load. The difference calculated is supplied to the display device information 11 and is presented to the operator. The operator, by analyzing the difference, taking into account the margin of error, decides to match weight field list.

The use of weights allows to reliably identify uniformly heated by the height of the tank as empty or full and, accordingly, increase significantly the th test results of commercial preservation of bulk cargo.

The list of references

1. RF patent №2138077 "Method of remote monitoring of cargo in the railway structure and system of remote monitoring of cargo in a moving train."

2. Jamison Ja Physics and technology of infrared radiation. - M.: "Soviet radio", 1965, s.

3. RF application No. 2004138052 "Method and device discovery of commercial scrap tanks of railway transport" (prototype).

1. The method of determining the mass of liquid bulk cargo in tanks of railway rolling stock, consisting in measuring the level of liquid cargo for imaging the image-side surface of the tank, calculating the volume of bulk cargo and its mass, characterized in that the data field sheet or according to the accompanying documents on the tank, determine the type of tank, the declared type and weight of bulk cargo, the fragment imaging portion of the side surface of the tank relative to its filled with liquid bulk cargo part, determine the temperature of the liquid cargo, calculate the mass of liquid cargo in view of its declared type, specific gravity measured at a given temperature and type of tank, weigh the tank, subtract from the received weight empty weight of the tank, given its type, so determine the m, the actual weight of bulk cargo, then the specified weight is compared with the declared weight of bulk cargo and by comparing the results conclude commercial cargo.

2. Device for determining the mass of liquid bulk cargo in tanks of railway rolling stock, containing thermal imaging surveillance device, which is moved tanks rolling stock, and monitor with the possibility of monitoring thermal image on the screen, characterized in that it further comprises an electronic scale to measure the weight of the tank, a device for determining the fill level of the cargo in the tank, the unit determining the temperature of liquid cargo for a thermal image of the tank unit type tank associated with the device calculate the volume of bulk cargo, unit cargo associated with the device calculate the mass of bulk cargo, the comparator and the display device state information of cargo, while the output of thermal imaging surveillance device connected to the input unit determining the temperature of liquid cargo, the output of the device determine the level of loading of the cargo in the tank through the serial connected device calculate the volume of bulk cargo, the device calculate the mass of liquid cargo, associated with an output unit determining the temperature of liquid cargo and the comparator is outinen with the device display information about the condition of the goods, when the free input of the comparator is connected to the output of the subtraction unit, the input of reducing input of which is connected to the output of electronic scales, and the input of the input wichitaeagle - with the output of the unit type tank.



 

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