SU909585A1 - Device for weighing vehicles - Google Patents

Description

(54) DEVICE FOR TRANSPORT RECOVERY

one

The invention relates to weighing technology, in particular to devices for weighing vehicles, such as automobiles while they are in motion.

Weight measuring devices for weighing transport tools are known, comprising a weighing platform supported by weight sensors connected to information processing units with interference suppression nodes tH.

The known devices are complex and do not provide the required accuracy.

The closest in technical essence to the present invention is a vehicle weighing device comprising a differentiator-driver connected to one trigger input directly and to another via a delay line, a coincidence circuit, one input of which is connected to the trigger output, weight sensor and recording unit 21

The known device does not provide the required weighing accuracy, since it does not take into account the attenuation of the variable component of the transient process.

MEDIA

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

The goal is achieved by inserting a counter, key, switch, scaling unit, quad, two memory cells, subtractor and divider into the vehicle weighing device

10 wherein the weight sensor is connected via a signal input of the key to the input of the differentiator-driver and to another input of the matching circuit, the output of which and the output of the counter are connected to the inputs of the switch, the first output of which is connected to the first input of the subtractor, the second output of the switch is connected to the inputs of the scale unit and quad, whose outputs through

20, respectively, the first and second memory cells are connected to the second input of the subtractor and the second input of the divider, the first input of which is connected to the output of the subtractor, and the output is connected to the registering unit, while the output of the registering unit is connected to the input of a gray counter, the counting input of which is connected to trigger output, and a control key input is connected to

30 to the third output of the switch. The drawing shows the block diagram of the proposed device. The device contains a sensor 1, a weight key 2, a differentiator-generator 3, a trigger 4, a delay line 5, a matching circuit 6, a signal counter 7, a switch 8, a calculator 9 consisting of a scale unit 10, a square 11, a storage unit 12 with two cells 13 and 14 of memory, subtractor 15. and divisor 16, and registering unit 17.. The device works as follows. After a vehicle has hit a weighing platform (not shown, weight sensor 1 emits a signal as a sum of a constant component corresponding to the steady-state value of the balance and a variable component of the transition process. The signal from weight sensor 1 is fed through key 2 to the input of the differentiator-driver 3 and the first input of the matching circuit 6. At the moment of transition of the variable component through the extreme value, the signal from the output of the differentiator-generator 3 enters the single input of the trigger 4 The input of the delay line 5. The flip-flop 4 goes into one state. The signal from the flip-flop output 4 is fed to the second input of the matching signal circuit and to the first input of the signal counter 7. At the same time, the matching circuit 6 opens, and the signal counter 7 is also started. After the time C required to read the signal from the weight sensor 1, the signal from the delay line 5 triggers the trigger 4 and returns to the original zero connection, and the coincidence circuit 6 closes. When a variable passes through the first extreme value, the signal counter 7 outputs to the second input of switch 8 a switching enable signal of the second input of computer 9 with the output of circuit b. match. When the variable component passes through the second extreme value, the signal counter 7 outputs to the second input of the switch 8 a switching enable signal of the first input of the calculator 9 with the output of the coincidence circuit b. The same signal is used to unlock the key 2, the second input of which is connected to the third output of the | commutator 8. At the same time, the output of the weight sensor 1 is disconnected from the rest of the device. The transmitter 9 operates as follows. The signal arriving at the second input of the calculator 9 and corresponding to the first extreme value of the variable component is fed in parallel to the scale unit 10, where it is doubled, and to the quad 11, in which the input signal is squared. The signals obtained as a result of these operations are recorded in the memory cells 13 and 14 of the storage unit 12, respectively. The signal received at the first input of the calculator 9 is fed to the first input of the subtractor 15, to the second input of which the output signal of the main unit stored by the first memory 13 is fed 10. From the output of the subtractor 15, a signal equal to the difference of the input signals is fed to the input of the divider 16, to another input of which the signal of the quadrant 11 is stored by the second cell 14 of the memory. At the output of the divider 16, a signal is obtained corresponding to Enikeev ustanovivshemus value of vehicle weight, determined on the basis of measuring the two extreme values of the variable component. This signal from the output of the divider 16 is fed to the input of the registering unit 17 for subsequent display in the required form. From the output of the registering unit 1 to the second input of the signal counter 7, a Reset signal is output, which restores its initial state. The device is switched on again by applying the Start command to the switch 8, according to which the key 2 is closed. The operation of the proposed device is based on the fact that the transition process in the system containing the elastic element, some mass and damper is obtained by solving the second order differential equation . This solution in the case under consideration has the form V (t) 1-ce-sin (ujt +), where Y (t) is the instantaneous reading of the weights; .T steady scale reading; t, (l, U), are the parameters that characterize the design of the scales and depend, in particular, on the weight of the load; t - time The extremum points of the function Y (t) are determined most accurately, since the function changes slowly and an accurate reading of the weights can be made. The derivative of the function Y (t) at the points of extremum takes a zero value, therefore, equating the derivative of the function Y (t) to zero, we get VCT -s cos (u) t-fV) - (((jOt + V) 0. From here tq ( iut. +), where t,. are the abscissas of the extremum points.

Claims (1)

Formula of the invention, A device for weighing vehicles containing a differentiator-shaper connected to one input of the trigger directly and to the other via a delay line, a matching circuit, one input of which is connected to the output of the trigger, a weight sensor and a recording unit are distinguished I mean that, in order to increase accuracy, a counter, a key, a switch, a scaling unit, a quadrator, two memory cells, a subtractor and a divider are introduced into it, and the weight sensor is connected to the differential input through the signal input of the key the torus former and with another input of the coincidence circuit, the output of which and the output of the counter are connected to the inputs of the switch, the first output of which is connected to the first input of the subtractor, the second output of the switch is connected to the inputs of the scale unit and quadrator, the outputs of which are connected through the first and second memory cells respectively with the second input of the subtractor and the second input of the divider, the first input of which is connected to the output of the subtractor, and the output to the recording unit, while the output of the recording unit is connected to the input Reset counter, the counter input of which is connected to the trigger output, and the control input of the key is connected to the third output of the switch.