SU659889A1 - Dynamic deformation measuring device - Google Patents

Description

one

The invention relates to the field of measurement technology, in particular for measuring shock deformations.

A device for measuring dynamic deformations is known, which contains a strain gauge, an electronic switch connected in parallel with a teizo sensor, a power source, a communication line connected to a recorder.

This device has insufficient noise immunity and has low operating characteristics.

It is also known a device for measuring dynamic deformations, comprising a strain gauge, an electronic switch connected in parallel to the strain gauge, a source of titration, and a discriminator connected to a recorder. This device is closest to the invention in its technical essence and the effect achieved.

The disadvantage of this device is that with mass measurements, it is necessary to have many communication lines for each measuring strain gauge, which reduces the amount of information transmitted.

The aim of the invention is to increase the amount of information transmitted over the communication line.

This goal is achieved due to the fact that the device is equipped with a second electronic key, a delay circuit connected in parallel with a strain gauge, a resistor

and a second discriminator, the anode of the second key is connected to the housing, the control electrode is connected to the output of the delay circuit, and the resistor is connected to the input of the second discriminator and the control electrode

first electronic key.

The drawing shows a circuit diagram of the device described.

The device contains a strain gauge 1, an electronic switch 2 connected in parallel to the strain gauge, a power source 3, a discriminator consisting of a diode 4, resistors 5, 6 forming a divider, and a capacitor 7, a second electronic switch 8,

connected in parallel to the strain gauge 1. The key 8 anode is connected to a housing (not shown in the drawing), the control electrode with the output of a delay circuit consisting of elements 9, 10, 11. Resistor 12 is connected

with the input of the second discriminator, consisting of a diode 13, resistors 14, 15, forming a divider, a capacitor 16, and a control electrode of the first electronic switch 2. The device also contains

jpesHCTOp 17, cumulative capacitance 18, resistor 19, diodes 20, 21, resistor 22 and recorder 23.

The device works as follows.

At the initial moment, the accumulative capacity 18 is charged from the power source 3, the electronic keys 2, 8 are locked.

The recorder 23 does not receive a signal, since the diode 4 is locked by the voltage removed from the divider of the first discriminator. The diode 13 of the second discriminator is also locked by the voltage removed from the divider of the second discriminator. A trigger pulse is applied to the control electrode of the electronic key 2. The electronic switch 2 is opened, and the capacitance 18 is discharged through the resistors 12, 19 and the strain gauge 1. At the same time, the diode 4 opens and passes the useful signal from the strain gauge 1 to the recorder 23. In this state, the device takes a measurement. The diode 13 remains locked because the voltage drop across resistor 12 is less than that of resistor 14. After a predetermined time for which the delay circuit is designed, the second electronic switch 8 starts up and the load cell 1 is short-circuited. From this moment, diode 4 is locked, and the signal does not enter the recorder 23. Capacitance 18 is discharged now through resistors 12, 19. At resistor 12, the voltage increases abruptly so that diode 13 opens, and a pulse is generated at the output of the second discriminator. the aid of which launches the electronic key 2 of the first discriminator connected to the recorder 23.

Thus, the device makes it possible to increase the amount of information transmitted over the communication line and reduce the number of communication lines compared to the number of measuring strain gauges.

Claims (1)

Invention Formula A device for measuring dynamic deformations, containing a strain gauge, an electronic switch connected in parallel to the strain gauge, a power source, a discriminator connected to a recorder, characterized in that, in order to increase the amount of information transmitted via LIVII communication, it is equipped with a second electronic switch, delay circuit connected in parallel with a strain gauge, a resistor and a second discriminator, the anode of the second switch is connected to the housing, the control electrode is connected to the output of the delay circuit, and the resistor is connected to the input of the second About the discriminator and control electrode of the first electronic key.