SU1471207A1 - Unit for counting articles - Google Patents

Abstract

The invention relates to information and computing technology and can be used as peripheral sensors for counting piece goods in production control systems. The purpose of the invention is to improve the accuracy of the account. The device contains OR 1 and 2 elements, time delay element, delay element 4, pulse formers 5 and 6, prohibition element 7, counter 8, control channels consisting of sensor 9, comparator 10, delay element 11 and setting unit 12, which consists of sources 13-15 of the reference voltage, a delay element 16, a pulse former 17 and a switch 18. The device allows cyclically interrogating the comparators and signaling this if they fail. 2 hp f-ly, 3 ill.

Description

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The invention relates to information and computing technology and can be used as peripheral sensors for counting piece goods in production control systems.

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

FIG. 1 shows a block diagram of the device} in FIG. 2 is a diagram of its operation; in fig. 3 - block setting settings.

The device contains the first and second SHSh 1 and 2 elements, a time delay element 3, a delay element 4, the first and second pulse drivers 5 and 6, a ban element 7, a counter 8, state control channels from sensor 9, comparator 10, elec - Delay element 11, setpoint setting unit 12, which consists of reference voltage sources 13-15, delay element 16, pulse generator 17, and switch 18.

Using serially connected delay element 16 and generator 17 of pulses of setpoint setting unit 12, sequential codes are used to control the switching address of switch 18, which sequentially connects sources 13-15 of reference voltage to setpoint setting output unit.

The device works as follows.

Before starting work, the parameters of the device delay elements 4 and 11, the pulse formers 5 and 6, and the time delay element corresponding to the controlled process, i.e. sequences of the passage of piece products in front of the sensors and the time spent by the products in front of the sensor.

In the initial state, the outputs of the setting unit 12 have a high setting level Ua. At the same time, a signal is generated at the control input of the trigger signal device by its falling edge by the pulse shaper 6, which passes through the element OR 2 and starts the setting unit 12 for the settings of the first channel, which sequentially switches to setpoint set and. The setting U exceeds the noise level in the device, but does not exceed the level of the information signal. In this case, the information

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if the product is registered with this channel. The setpoint U is chosen to be lower than the noise level that exists in any electronic device, and as a result, the comparator 10 is activated (if it is operational) from the noise of the device on this clock cycle. Next, the setpoint unit 12 is switched to the high setpoint Uj, and the comparator 10 is set to O.

Thus, each comparator 10 sequentially for two clock cycles searches the input signal for the information signal from the product, and for the second cycle the diagnostics of the device channels is determined. After the comparator 10 on each channel has triggered, the trailing edge of the signal through the time specified by the channel delay element 11 signal, the block 12 is set to the setting of the subsequent control channel. This is how all the comparators of the device cycle. Diagnostic signals and information signals, passing through the common element OR 1, enter the time delay element 3 input and continuously reset the time entered by element 3. If any control channel fails, the cyclic turn on and the comparator 10 turn off, signaling device failure. The output signal of the OR element 1, delayed by the signal delay element 4 and generated by the first driver 5, controls the inhibit input of the prohibition element 7, the information input of which at this time receives a subsequent signal from the output of the OR element 1. Thus, at the output of the element 7 the first of the group of counting signals, which are formed by the comparator 10 in the presence of an information signal, i.e. block on elements

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The 5 pulses and the prohibition element 7 is the block for the separation of the first pulse from the burst that comes from the output of the second element OR 1..

Thus, in the proposed device, a constant cyclic survey of all sensors and diagnostics of all control channels are carried out.

Claims (2)

1. A device for counting piece goods, containing sensors by the number of control channels, the first OR element, the output of which is connected to the information input of the element, the prohibition of whose output is connected to the counter input, the second OR element, and the time delay element whose output is the device output This is due to the fact that, in order to improve the accuracy of the device, pulse shapers, a delay element are introduced into it, and a comparator, a setpoint setting unit and a delay element, the output of the first element OR sent to the prohibitor input of the prohibition element, the input of the second pulse generator is the control input of the device, the output of the second pulse driver is connected to the first input of the second OR element, the output of which is connected to the control input of the setpoint setpoint of the first control channel. in each channel, the output of the sensor is connected to the first input of the comparator, the second input of which is connected to the output of the setpoint unit, the output of the comm parameter of the control channel each channel is connected to the input of the delay element and the corresponding input of the first OR element, the output of the delay element of each channel except the last one is connected to the control input of the setpoint unit for the subsequent control channel, the output of the delay element of the last control channel is connected to the second input of the second element OR 2. The device according to claim 1, characterized in that the setting unit comprises a pulse shaper, a delay element, three sources of reference voltage and a switch, the output of which is the output of the parameter setting unit, the input of the pulse shaper is the control input of the unit the settings, the pulse driver output, directly and through a delay element, is connected to the control inputs of the switch, the information inputs of which are connected to the outputs of the respective reference voltage sources. -Y --- H US- -c ::: - --- pgU Comparator setpoint : s g- -1 t il Counter input R x fua.i figs