SU1571414A1 - Device for weighing moving objects - Google Patents

Abstract

The invention relates to a weight measuring technique and is intended for use in electronic weight measuring devices and systems used for weighing moving objects in enterprises of the mining, metallurgical and other sectors of the industry. In order to increase the reliability of operation due to the reference control, the modes of control, calibration and execution of the algorithm for the operation of track sensors with reference measurement signals are introduced, which are carried out in the following sequence. The control mode is carried out using the control unit 15, which sets the control signals that provide connection to the input of the block 18 pushbutton simulators 11, the generator 13. The operation algorithm is set by sequential signaling of the simulators 11 track sensors, photodetector 1 and at specified time points frequency corresponding to the specified measurement range. The correct operation of the device is judged by the control reference printing of signal processing results. The load platform 4 with the weight sensor 9 is loaded with exemplary weights in a specific sequence of operation of the device. The correctness of weighing is judged by the reference print and comparison with the value of the actual mass. 1 il.

Description

The invention relates to weighing technology and can be used in electronic weighing devices and systems used for weighing moving objects in the mining, metallurgical and other industries of industry

The purpose of the invention is to improve the reliability of the weighing system for the reliability of information processing and operation of the device blocks due to the reference control equipment.

The drawing shows a block diagram of the proposed device control operation of the microprocessor weighing system.

The device contains an optical photodetector 1, a code array 2 s, an optical emitter 3, a load-receiving platform 4, track sensors 5-8, a frequency frequency sensor 9, optical coupling unit 10, push-button simulators 1 1- signals of track sensors, a simulator 12 of photoreception signals - nickname, multi-output reference reference JIT

target generator J, multiplexers 14S control unit 15, track sensor unit 16, system automation unit 17, microprocessor computing unit 18, control keypad 19, timer unit 20, current time indication unit 21, printer interface 22, and printer 23 „

The outputs of the optical photodetector 1, the outputs of the travel sensors 5 and 6, and the outputs of the weight sensor 9 are connected to the optical coupling unit 10. The outputs of block 10, the outputs of four pushbutton simulators 1 of signals of track sensors, the outputs of simulator 12 signals of a photodetector and the outputs of a multi-mode reference quartz generator 13 are connected to the inputs of multiplexers 14, the three outputs of block 15 of the system control are connected to the input of multiplexers 14, and two to the inputs simulator 2 signals photo

Q module and multi-output crystal oscillator 13 Four outputs of multiplexers 14 are connected to the inputs of the 16 track sensor unit, one to the input of the automation unit 17, two outputs 5 to the inputs of the microprocessor computing unit 18, and two to the input. Automation unit 17, one output of which is connected to unit 16, A keypad 19 controls and a timer unit 20 connected to the display unit 21 are connected to the inputs of the microprocessor calculating unit 18 by means of information and control buses. The microprocessor computing unit 18 is connected via the information bus to the interface 22 with a printing device 23, the output of which is connected to the printing device 23 by an information bus, and block 17

automation with the help of control links is connected to the block 22 and the printing device 23C

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The main signals of the blocks used in the device are:

signals of reference frequencies, proportional to the average value of the weight of the axis of the car, and the frequency equal to 1 Hz, supplied from the output of the multiplexer 14 to the input of the automatic control unit 17;

signals from the 16 track sensor unit, generated depending on the order of the trip sensor response 5-8 or the signals of the four push-button simulators 11 track sensors: the beginning of the train, the direction of travel, the start of weighing the axle, the type of car,

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All these signals are fed to the input of the microprocessor computing unit 18, and the signals of the Start of composition and the start of weighing the axis are also fed to the input of the automation unit 17.

The device works as follows.

The control unit 15 implements the following operating modes of the device: the working mode, the reference control mode of the information processing and equipment operation, the calibration mode, and the tracking mode of the track sensors.

A distinctive feature of all modes of the device is that, depending on the control signals of the control unit 15, through the multiplexer unit 14, various units of the unit are connected to the input of the unit 16 track sensors and the microprocessor computing unit 18. combinations of blocks 10, 11, 12 and 13.

In the operating mode, the optical coupling unit 10 is connected to the input of multiplexers 14, and from the bus of the crystal oscillator 13 only a connection with a carrier frequency equal to L Hz, which allows recognition of a moving object, the Code lattice

2 installed on the locomotive. The presence of windows and bridges in the grating allows to block the light beam from the radiator

3 and shading the photodetector 1. This leads to the development of a pulse equal in duration to the width of the opaque jumper of the code grid and the speed of movement of the locomotive. The combination of pulses and the absence of them allows us to form a binary code corresponding to the locomotive number. Along with identification, the cars and the train as a whole are weighed, the types of cars in the train are recognized, the direction of movement of the train is determined.

and is printed, and in addition to the listed parameters, by the time of passage of the composition through the weighing station.

In the mode of the reference control of the system, using the control unit 15, four simulators 11 of the travel sensor signals, a simulator 12 of the photoreceiver signals and a communication line of the multi-output quartz oscillator are connected to the output of the multiplexers 14.

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torus 13 with different frequencies proportional to the average value of the weight of the axle of the car (along the path sensor algorithm and a frequency of 1 Hz).

In the calibration mode, the output of the frequency sensor weight 9 is connected to the outputs of the multiplexers 14 through the optical interface unit 10, through the buttons of the simulator 11 of the traveling sensors and the simulator 12 of the photodetector signals.

When performing the test mode of the algorithm of the track sensors, the track sensors 5–8, the multi-output crystal oscillator 13 and the simulator 12 of the photoreceiver signals are connected to the outputs of the multiplexers 14.

The operating mode of the microprocessor weighing system and the mode of the reference control of information processing and equipment operation are identical to the algorithms of the system as a whole. The essential feature is that in the control mode, the input of the microprocessor computing unit 18, the 16 track sensors block and the automation block 17 from the outputs of the multiplexers 14 receive clearly defined (corresponding to the actual algorithm of the photodetector, track sensors and weight sensor) (simulator 11 track sensors), a sequence of signals from simulator 12 signals of a photodetector, corresponding to the known composition number, and reference frequencies with multiple The output quartz oscillator 13, corresponding to the average calculated reference values for the weight of the axle, the carriage and the train as a whole, allows the control unit to check the number of the composition, the weight of the axle, the car and the train, the response time of the automation unit and print the results of the specified signals and system operation. It is checked not only the correctness of information processing, the operation of individual units, but also the operation of the equipment: in general.

In the operating mode, with a motor train consisting of four-axle cars, the sequence of operation of the travel sensors will be as follows:

where the numeral indicates the number of pa to the moment the trip sensor is triggered, the digit b is underlined the moment n of the axis embroidering,

In the reference TL ™ reference mail mode, but in the same sequential -i ie, it is necessary to set the following signals with the help of a cpopo: - imitation simulators:

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The control unit 15 allows the E relevant moments to watch the simulator 12 of the photoreceiver signals and connect via the multiplexer 1 also the outputs of the multi-output kvashche generator 13 (instead of 9 weights) s to the input of the microprocessor unit 18

When the trip sensor 5 is triggered, the frequency, raster 1 Fi, arrives at the input of the automation unit 17, from the quartz detector 13, the multiplexer

SRgnal track sensor shrech

Optical interface unit 10 hours of the multiplexer 14 is fed to the input of the 5uk 16 track sensor, which leads to the generation of the signal. The composition and the start of the program of operation of the processor computational unit 18, as well as the activation of the 23 device from the signal of the block 7 of the automatics, since the time delay of the flea time delay of the automaton-ticks was started, the microprocessor and: the numeral unit 18 immediately counted the current of the specified interval i time pi of the weight sensor 9, rotated through the optical unit 10 Souch Enlch and multiplexer 1 on vkhol bdokg 16 track sensors, that przsotsgg: i PM-processing the signal Start sour cream and start the program of work. H Cropprocessor computing b: ok, 1 18. as well as the inclusion of le at-23 23 from: signal block L ki since the launch of the gchlchi kal; time hold. and block 1 / avgom - tikiv microprocessor sznachitelny block 18 immediately reads over a predetermined period of time the frequency of the sensor 9 weight, coming through the block 10 optical coupling

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 the first car;

second car;

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The last car of the train

m multiplexer 14, This frequency corresponds to the unloaded platform,

In the control mode, everything happens identically, but only from one of the / foot-switch simulators 11, the corresponding track sensor 5, and as an initial zero frequency corresponding to an empty platform, the cabinet is proportional to the frequency from the generator 13c.

Starting the counter of the automation unit 17 allows organizing a time delay before triggering the sensor 6 or its simulator P control mode. If the signal from the track sensor 6 does not arrive in a predetermined period of time (the capacity of the counter at a frequency of 1 Hz; not full, i.e., no axis weighting signal), then the hero of the track sensors block 16 is going through the bus from the automation block 17, resetting the block 16 to its initial state removes the signal From the microprocessor computing block 18 from the input of the microprocessor computing unit 18. Yeshiz np u As with block I7 -to yumatiki there enable signal interface unit 22 and incorporated echatayuschee device 23, the printing occurs fault word unit shutdown occurs after printing 22 and printing device 23,

If the trip sensors are triggered (pressing the track datasets simulators in the control mode) P occurs in a predetermined sequence and the 6 cp sensor starts earlier, then the counter in block 17 of TV mathematics is filled, then block 16 track and g signal Start axis drop. This will cause the counter of the interval of the inter-axis iu - -say or in the automatic control unit 17 to be reset to the initial state, and | The speed sensor unit 18 measures the frequency of the weight sensor 9 for a given time interval (axis on the load-receiving tatform).

In the control mode, before the simulator of the second track sensor simulator but p &

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This reference frequency is varied upwardly, for example by two orders of magnitude, by the control signals of unit 15. Such an increase is due to the fact that the load on the axle of the locomotive is always greater than that of the cars, as a result of which the first axle of the locomotive is weighed. After simulating the weighting of the second axis of the locomotive, a signal is given to start the photoreceiver simulation module. If the signal through multiplexer 14, like the signal of crystal oscillator 13, is fed to the input of micro processor computing unit 18. The signals from the photodetector simulator are read by the microprocessor computing unit and the known locomotive reference number is written into the memory cell. Each signal of the track sensor simulator 6 generates in the block of 16 track sensors a start of the axis weighing, which starts the microprocessor computing unit to read the frequency imitating the load on the weight sensor, and resets the inter-axis time counter in the automation unit to its original state. After weighting the six axes of the locomotive using the controls of the unit 15, the frequency supplied from the quartz oscillator 13 is changed, further simulating the load from the axes of the first car. Successively pressing the buttons of simulators 11 track sensors weighed axis. Since the weighing system is designed for dynamic weighing, the axis weighing interval is divided into n intervals, i.e. T0 & tn, where Dg is the measurement interval. In general, the system implements a non-recursive digital filter for which the ratio

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PO is the mass of the weighted axis;

G- is the mass value of the axis measured during the time u t on the 1st section with the subtraction of the weight of the empty platform (zero frequency);

A - r is the value of the weighting function coefficient used to suppress dynamic

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components in the weight sensor signal.

After weighing (simulating) the first car, the value of the reference frequency of the weight sensor is again changed and successively imitate the weighing of several cars, the frequency changes. After imitating the weighing of several cars, they stop pressing the track sensor simulators. With a frequency of 1 Hz, the time delay counter is filled in the automatic control unit 17. The signal from the output of block 17 resets the beginning of the train in the block 16 of the sensors of the control signal, and the second signal of the block 17 opens the circuits of the interface block 22 for outputting information from the microprocessor computing unit 18, as a result of which it goes from receiving information to processing it In accordance with the previously recorded program, the accumulated values of the signal of the simulator of the weight sensor are processed. At the end of the arithmetic processing, the microprocessor computing unit analyzes the signals of the type of car and the direction of motion supplied from the output of the track sensor unit. If they are equal to one, then the first six measurements are discarded, as they correspond to the locomotive, and then the weight of the car is formed by successive summation along four axes. After forming the weight of the cars, the weight of the train is formed and the microprocessor computing unit 18 reads the current time of day value from the output of the timer block. After the processing of information is completed, it is printed in the following sequence: time, number of the train, weight of each car, weight of the train, direction of travel. After printing, the system shuts down. Since the reference frequency was fed to the input of the weighing system as a weight sensor signal, proportional to the average value of the car axis, and signals simulating the number of the composition, signals from the travel sensors were detected from the photodetector, the calculated print reference values are known. The obtained values indicate the health of the entire system when they match the values of the standard.

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reception platform with a weight sensor, four track sensors, a code grid with an optical emitter and a photo receiver, an optical interface unit, a track sensor unit, an automation unit, a microprocessor computing unit, a keypad, a timer unit, a display unit, an interface unit and a print unit, outputs of a frequency weight sensor, track sensors and a photodetector are connected to the corresponding inputs of an optical interface unit, the output of the timer unit is connected to the input of the display unit, a keypad and a unit the timer is interconnected with the microprocessor computing unit, the output of which is connected to the printing unit through the interface unit, inputs one to four are connected to the corresponding outputs of the track sensor unit, and the first and second inputs are also connected to the first and second inputs of the automation unit, that, in order to increase reliability due to the reference control, four track sensor simulators, a photodetector simulator, a multi-output reference crystal oscillator, a control unit and a multi At the same time, the outputs of the push-button simulators, the outputs of the photo-receiver simulator, the outputs of the reference crystal oscillator and the outputs of the first to the third control unit are connected to the corresponding input of the multi-axis unit, whose inputs are connected to the fifth and sixth inputs of the microprocessor computing unit, the information inputs of the track sensor unit and the third input of the av block, respectively, the fourth and nth inputs of the control unit are connected to the inputs of the simulator receiver and the reference quartz indicator a., and the control outputs of the automation unit are connected to the corresponding inputs of the track sensor unit, the interface unit and the print unit, M0 Zhukov

Proofreader S.Shevkun

Order 1504 Circulation 421 Subscription

VNIIPI of the State Committee for the Issuance of M and the Discoveries of the USSR State Committee for Labor and Defense 113035, Moscow, railway workshop, Raushsk nab, d. 4/5

Claims (1)

In the calibration mode of the weighing system, simulators of track sensors and a photodetector simulator are connected to the multiplex input. A special feature of this mode is that the weight sensor on which the load-receiving platform rests is connected directly through block 10 and multiplexer 14 to the output of microprocessor calculator 18e. The control car (for example, a weight-testing model car 640 GNP) is axially rolled onto the gr / -stop receiver platform, the weight sensor generates a signal proportional to the weight of the control axis Carriage gauge sequentially imitating signals from track sensors and photoelectric receivers, weighing the axles of the carriages; system performance is judged by the received weight values of the weighing carriages. This mode allows you to tare the load receiving platform together with the weight sensor, since coefficient of proportionality between the sensor frequency and the actual weight created by the axis of the weight-wagon car. In the mode of monitoring the operation of the track sensors, the track sensors are connected to the input of the system equipment. 5-8С The weight sensor uses the output of a quartz gel detector, and a photocamera is used as a simulator, “Lokomotivo- composition moves at a speed of up to 3 km / h. The operator, using the controls of the unit 15, changes the signal) for the proportional signal for the sensor the weights of the sensor triggering input (the signal is generated by the LED AL 102), the sequence of the sensors travels to the operating mode, - the operation of the track sensors is judged by specifying the number of specified signals and the number of fixed signals new composition. The formula invented is a device for weighing di. objects, which contain cargo Sost Vitel Editor L „Revin thirty :-five A o jO