SU591889A1 - Component counter - Google Patents

Description

(54) DEVICE FOR DETAIL ACCOUNT

one

The invention relates to automation and can be used in parts counting devices on presses.

Parts counting devices are known, comprising a vibration sensor, an amplifier, a threshold element, a time relay and a counter 1.

However, this device has a limited scope, low noise immunity, reliable operation and accuracy of counting.

The closest in technical essence to the invention is a device for automatic counting of parts, comprising a sensor connected to an amplifier, a coincidence element and a counter 2.

This device makes it possible to increase the accuracy of the counting of parts as a result of the use in it of a position sensor of a press tool installed precisely in the workpiece zone.

However, this significantly complicates the device itself and requires adjustment of the location of the position sensor.

In addition, the possibility of false positives of the device at idle press from technological vibrations is not excluded, since the sensor, sensitive to vibrations of any origin in the wide frequency range, is still used as a sensitive element in the device.

All this adversely affects the sensitivity and reliability of the device.

The purpose of the invention is to increase the sensitivity and reliability of the device by achieving a null organ, a single vibrator and a series-connected time relay, a detuning element and a threshold element, the amplifier output being connected to the zero organ input, the output of which is directly and through the single vibrator. connected to the input of the coincidence element, the output of which is connected to the input of the time relay, and the output of the threshold element is connected to the counter.

FIG. 1 shows a block diagram of a device for counting parts; in fig. 2 shows the vector diagrams for the operation of the device.

Claims (2)

The device contains sensor 1, amplifier 2, null organ 3, one-shot 4, coincidence element 5, time-based relay 6, restart element 7, threshold element 8 with a relay, and counter 9. Moreover, U | is the voltage of an adjustable zero response threshold -organ; IJ2 voltage from sensor 1 output, amplified by amplifier 2; Ultrasonic voltage at the output of the null organ 3; U4 is the voltage at the inverse output of the one-shot 4; Uj is the voltage at the output of coincidence element 5; Ue- voltage at the output of the time relay b with restarting. The device works as follows. DAD-chik (accelerometer AT-1 of the MAIN type) has its own frequency of oscillations of the master no more than 2, Hz. Therefore, it is sensitive to non-periodic sharp changes in accelerations and is not sensitive to harmonic high-frequency vibrational oscillations. Sensor 1 attached to the press slide produces a harmonic damped oscillation signal with a frequency of 2 Hz at the moment of machining the part accompanied by a non-periodic change in acceleration of the press slide. From the periodic-technological high-frequency vibrations of the press slide, the sensor 1 produces a pulsed aperiodic short interfering signal only at the moments of the occurrence of these vibrations. Signals from the output of sensor 1, amplified by amplifier 2, are fed to the input of the zero-organ 3 and, if they exceed its threshold, the zero-body 3 produces pulses, the number and duration of which is determined by the number and duration of signals from the output of amplifier 2 Voltage pulses from the output of the nullorgan 3 trigger a single vibrator 4, producing an appropriate number of signals of the reference duration, longer than the short aperiodic signals of interference from the technological vibrations of the press, but less the duration of the harmonic signals from the output of amplifier 2, caused by machining the part. The signals of the reference duration from the inverse output of the one-shot 4 are fed to one input of the coincidence element 5, and the signals from the zero-output 3 output to the other input of the matching element 5. At the output of the matching element 5, signals are generated only under the condition that the duration of the signals from the zero output -organ 3 exceeds the duration of the reference signals from the output of the one-shot 4. Therefore, only the signals of harmonic damped oscillations generated by the sensor 1 at the time of processing the part are extracted, and all signals are eliminated interference. Signals from the output of the coincidence element 5 start the time 6 relay with a restart, which generates a single counting pulse, the duration of which is longer than the period of harmonic damped signals produced by sensor 1. Invention The device for counting parts, containing the sensor connected to the amplifier, is a coincidence element and a counter, characterized in that, in order to increase the sensitivity and reliability of the device, a null organ, a one-shot and a time relay connected in series are inserted into it, and a threshold element, the amplifier output being connected to the input of a null organ, the output of which is directly connected to the input of the coincidence element, the output of which is connected to the input of a time relay, and the output of the threshold element connected to a counter. Sources of information taken into account in the examination: 1.Certificate of certificate number 402041, cl. G 07 C 3/10, 1972. 2. Certificate of author No. 357580, cl. G 07 C 3/10, 1971.