SU898475A1 - Device for production process motion-time study - Google Patents

Description

one

The invention relates to a technique for recording time during the testing of machines, technological lines, in particular, to the recording of the time for performing technological operations.

A timing device is known comprising two process sensors, coincidence elements, counters, inverters, a clock generator, an engine operation sensor, a motion sensor, and a total time counter l.

 The disadvantage of this device is its low reliability and accuracy.

The closest to the proposed technical entity is a device for technological timing, containing a pulse generator, a pulse counter, a power unit whose output is connected to the input of a switch, according to the number of technological operations — pulse counters, keys, indication elements, and charge discharge circuit with capacitor 2.

However, when the counters are switched during the operation of the counting pulse, they are triggered repeatedly due to the bounce of the switching contacts. Therefore, during operation of the named device, there is a large error in recording the time of individual operations, especially on those meters that are most frequently switched.

The purpose of the invention is to improve the accuracy of recording the time of technological operations and the reliability of the device.

The goal is achieved by the fact that a device for technological timing, containing a pulse generator, pulse counters, a power supply unit whose output is connected to the input of the switch, a common pulse counter, a process operation key and display elements, additional keys, a single 20 vibrator and AND elements, the outputs of the first of which are connected to the outputs of the switch, which are connected to the first inputs of process operation keys, the outputs of which through the corresponding 255 pulse counters These operations are connected to the display elements, the output of the pulse generator is connected to the first inputs of the first additional key and the second element I, the output of which is connected to the second input of the first additional key through the one-shot, whose output is connected to the second pulse through the second additional key the inputs of the keys of technological operations, the output of the first element And is connected to the second input of the second element I.

The drawing shows the block diagram of the device.

The device contains a pulse generator 1, a second key 2, a counter of 3 technological operation pulses, keys 4 and 5 pulse counters, switch b, power supply unit 7, first and second elements 8 and 9, one-shot 10, first key 11 of technological operations, display elements 12. The number of counters 5 pulses and key elements 4, indications 12 with replacements and inscriptions to them are selected depending on the number of timed operations, and the number of channels on the number of timed machines or production lines.

The device works as follows.

For example, in comparative tests of four tractors on control shifts, the device should consist of four identical channels, with the number of counters 5 pulses equal to the number of operations. The start of any operation of each test trator is reported to the operator, for example, by radio (the first is the working stroke, the second is technological stop, etc.). Receiving a signal about the beginning of an operation, the operator presses the switch 6 key, corresponding to the number of the tractor and this operation, thereby connecting the corresponding pulse counter 5 to the pulse generator 1 through the second key 2, which closes at the beginning of the test and opens after it ends . In those cases when the switching of the pulse counters 5 is performed during the operation of the counting pulse, the blocking circuit is activated. The first element And 8 generates a pulse, which through the second element And 9 starts the one-shot 10. The leading edge of this pulse locks the first key 11, thereby blocking the passage of the counting pulse for the switching time of the counters 5 pulses and the effect of the counting pulse. In this case, the pulse duration of the one-shot is equal to the length of the counting pulse generated by the pulse generator 1. After completing the control circuit, the operator takes readings of the meters.

5 The proposed device allows timekeeping work of machines and process lines both with the operator and in automatic mode. The inclusion in the device of the Q-block of the reference pulse allowed us to significantly improve the registration accuracy, and the arrangement of the indicators of operational counters with replaceable inscriptions on one panel next to the button of the switching switch allowed us to simplify the device and increase its reliability.

Claims (2)

1. USSR author's certificate number 688909, cl. G 07 C 5/10, 1978. 2. USSR author's certificate No. 534774, cl. G 07 C 3/04, 1975 (prototype),