SU1571415A1 - Device for weighing trucks in movement - Google Patents

Abstract

The invention relates to weighing technology and improves the accuracy of weighing automobiles in motion. The weight signal of a moving car, completely located on platform 1, measured by force-measuring sensor 2, is supplemented by sections extracted from signals of load-measuring sensor 2 measured each of the vehicle axles separately through the platform 1. 3 il.

Description

(21) 4338669/24-U

(22) 12/08/87

(46) 06/15/90. Bul No. 22

(71) Zaporizhia branch of the All-Union Scientific Research and Design Institute Tsvetmetavtomatika

(72) A.E.Lipman, A.I.Shapiro, A.S.Kukui A.N. Zamotaev

and B.L.Serer Nnikov

(53) 681.269 (088.8)

(56) USSR author's certificate

No. 1183839, cl. G 01. G 19/03, 1985.

(54) DEVICE FOR WEIGHING CARS IN MOTION

(57) The invention relates to a weight measuring technique and allows an increase in the accuracy of weighing automobiles in motion. Measured by the force-measuring sensor 2, the signal of the weight of a moving car, completely located on platform 1, is complemented by areas extracted from the signals of force-measuring sensor 2, measured during the passage through platform 1 separately of each of the vehicle axes, 3 sludge.

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The invention relates to weighing technology and can be used for weighing automobiles during their driving under industrial conditions.

The purpose of the invention is to improve the accuracy of the device,

FIG. 1 shows a block-cxe-ia of the proposed device for taking more than a large auto dump in a quarry; ka FIG. 2 are timing diagrams illustrating the operation of the device} in FIG. 3 a control block.

The device contains a load-receiving platform 1 with a force measuring L and travel 3 and 4 sensors, microprocessor computing device

5 containing a central processor

6, read only memory

7, the control device 8 and the synchronizer 9 "By the data buses and the address. I the microprocessor computing device 5 is connected to the memory block 10,

and on data buses (SM) - with the know-digital converter 11, the load cell 2 is connected to the first input of the adder 121 to the first analog input of the switch 13 and through the filter 14 to the analog input with an pinning device 15, whose output connected to the second input of the adder 12,

The first output of the 16-ratchet unit is connected to the first input of the microprocessor calculating device 5, with the control input of the analog storage device 159 and the second output of the subrack block 16 is connected to the second interrupt input of the microprocessor computing device 5C Output totalizer; 1 12 connected to to the second analog input terminal of the switch 13B, the first second control inputs of which are connected to the second y to the third output of the control unit 16, and the output of the switch S3 to the input of the analog-digital converter .i1, Dv entry the control unit 16 are connected to the wayside sensors 3 and 4, respectively, and the reset input is an external input device of the original installation. The microprocessor computing device 5 via the data bus is connected to the indicator 17. The control unit 16 contains two counting flip-flops 18 and 19 and one RS flip-flop 20, the OR element 2 and the AND 22 and 23 elements

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WITH

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The device works as follows.

Before the signal is weighed by a Reset signal (for example, from the control panel), the device is brought to its initial state (the triggers in the control block 16 are set to the logical O state). When a cargo receiving platform 1 is hit first along the axis of the dump truck, the track sensor 3 (moment t ,,, fig 2, 2a), the trigger trigger 18 (fig 3) to the logical 1 state, force from the first axis transmitted by the load sensor 2, enters through the filter 14 a low-pass filter) to the input of the analog storage device 15, wherein the signal partially suppresses -: dynamic disturbance, and the value of the constant component allocated by the filter output 43 is close to the mass of the first axis (m ; t, -t in FIG. 2) By hitting the second axis and the second the trip sensor 3 (t2 in FIG. 2a), the corresponding pulse, the passage of a four-way open element 22 of block 16, switches the analog storage device 1 5s, sets the EZ-flip-flop 20 to the logical state: and enters the microprocessor interrupt input computing device 5 then causes the analog signal storage device 15 to memorize the signal value close to the carrier of the first axis; the control inputs of the switch are set to logical state 10, connecting the output of the measurement sensor 2 to the input The analog-to-digital converter i1, as a result of which the central process 6 in the microprocessor computing device 5 translates the use of the program, is previously recorded; oh in postsc vtm storage device 7 (time t2 in fig, 2), By: program the code values of the signal of the analog-digital converter 1 1 corresponding to the pressure sensor from the measuring sensor 2 about the impact of the whole dump truck -, (both wasps) moving along a load-lifting platform are interrogated by the central processor b and entered into the cells of the 5-block 10 memory (t4-t3, fuh ,, 2e and FIG, 2k), after the exit of the first axis from the lifting platform Ib the second axis is moving along it, measurements are not converted, as is usually the case

515

in weighing systems (Fig. 2k), a is continued. In this case, the signal from the track sensor 4 (C, Fig. 2b) triggers 19 in the control block 16 is switched to the logical 1 state. Binary code 11 is installed on the switching inputs of the switch 13, which is connected to the input of the analog-digital converter 11 the output of the adder 12, the signal from which corresponds to the second axis moving on the lifting platform 1 of the second axis, summed with the first axis stored in the analog storage device 15 of the first axis that previously passed through the receiving platform 1 (t9-t4, fig. 2h).and the input of the analog-digital converter 11, and therefore in the memory block 10, a signal is recorded that is much longer in time (in comparison with FIG. 2k) and contains more information (periods) on the interference At the time tt, when from a lifting platform 1 the second axis (i.e., at the exit of the dump truck) moves the signal from the track sensor 4, selected by the element AND 23, through the element OR 21 translates the control unit 16 into its initial state, as a result, the central processor 6 is started up to execute another program. data array, recorded in memory block 10 is subjected to final processing, dynamic disturbance is suppressed (for example, by weight averaging), and the measured value of the constant component is scaled and indicated by indicator 17 as the weight of the car

15

Claims (1)

Invention Formula A device for weighing automobiles in motion, containing a force-measuring sensor, track sensors, a microprocessor-based computing device, a memory unit, an indicator, a control unit, the inputs of which are connected to track sensors, first. output - with the first interrupt input of a microprocessor computing device connected via the data bus to the indicator and the first input of the memory block, the second input of which is connected to the address bus, which is different in that, in order to improve the accuracy, an analog storage device adder i a switch, an analog-to-digital converter, the output of the force-measuring sensor is connected to the first input of the adder, the first analog input of the switch, the filter input, and the first output of the control unit is connected to the control input of the analog storage device, the second and third the outputs — respectively, with the first and second control inputs of the switch; the fourth output — with the second interrupt input of the microprocessor-based computing device; the output of the filter through the analog storage device connected to the second input of the adder, the output of which is connected to the second analog input of the switch, and its output is connected via an analog-digital converter to the data bus of a microprocessor computing device, h