SU966627A1 - Switching device for testing to electric circuit parameters - Google Patents

Description

The invention relates to automation and computing and can be used in the electronic industry for quantitative and qualitative analysis of the performance of various automation devices, such as multilayer printed circuit boards, switching devices and cable products.

A device for checking the parameters of electrical circuits, comprising a switch, a control unit and a C 1J meter, is known.

However, this device is not very reliable due to the inability to control the communication line between the output buses and the control object.

The closest to the proposed is a switching device containing a group switch, the first contacts of each key pairs of which are connected to the corresponding input buses and the first terminals of the capacitors, the second terminals of which are connected to the first input of the capacitance meter, the second input is connected to the first input of the measuring unit and the second contacts the first keys of each pair, the second input block

the measurement is connected to the first output of the control unit, the first input of which is connected to the output of the measurement unit, and the second to the output of the eMKOCTHf2j meter.

However, the performance of this device is significantly limited by the size of the capacitors connected to the monitored channel, 10 because the duration of the transition process when switching monitored lines is proportional to the capacity connected to the channel.

The purpose of the invention is to increase

15 speeds.

The goal is achieved in that a switching device for checking the parameters of electrical circuits containing a group switch, the first contacts of each key pair of which are connected to the corresponding input buses and first terminals of the capacitors, the second terminals of which are connected to the first input of the capacitance meter, the second input of which connected to the first input of the measuring unit and the second pins of the first keys of each pair, the second input of the measuring unit is connected to the first output of the control unit, the first input of which is connected To the output of the measuring unit, and the second to the output of the capacitance meter, a current gesherator, a transient completion fixation unit, an output bus partition switch, a high-frequency generator, a parameter setting unit, a program input block, an address selector, an input bus number decoder, and a partition decoder have been entered ( the output bus, where the moving contacts of the switch splitting the output bus are connected to the second contacts of the second keys of the corresponding key pairs of the group switch, the disconnecting contacts of the switch are split connected to the second contacts of the first keys of each pair, and the closing contacts KOM-J of the splitting mutator are connected to the third input of the generator, the second input of which is connected to the first output of the reference voltage source, the second output of which is connected to the third input of the measuring unit and the first input of the unit fixing the end of transients, the second input of which is connected to the first. the output of the current generator, the second output of which is connected to the input of the high-frequency generator, the output of which is connected to the fourth input of a capacitance meter, the fifth input of which is connected to the output of the transient termination fixation unit, the third output of the current generator is connected to the fourth input of the measuring unit, the fifth the input of which is connected to the output of the parameter setting block, the input of which is connected to the first output of the program input block, the second output of which is green with the third input of the block / control, the second output of which connected to the input of the program input unit, the third output of which is connected to the input of the address selector, the third output of which is connected to the first control input of the switchboard, the bit inputs of which are connected to the outputs of the decoder of the input bus number, the inputs of which are connected to the corresponding output outputs an address selector whose other bit outputs are connected to the corresponding inputs of the output bus partition decoder, the outputs of which are connected to the control inputs of the partition switch output oh tires g

The drawing shows the block diagram of the proposed device.

The commutating unit for checking the parameters of electrical circuits contains a group commutator 1, p. serially connected contact keys 2 and 3, kondensa TOfxa 4, connected to the input buses

5 and connected to the controlled circuits 6 of the verification object 7, the first output bus of the 8-group switch, the second output buses 9 of the group switch, the switch 10 of the output bus with contacts 11 and the output bus 12, the decoder 13 of the output bus, address selector 14 , decoder 15 input bus number, control block 16, program input block 17 high frequency, generator 18, capacitance meter 19, measurement block 20, napaMeTpoBj task set 21 current generator 22, transient end fixation unit 23, reference source 24 voltage, parasitic capacitance 25 of the installation, a common bus 26 includes capacitors.

The device works as follows.

The lio start command, which enters control unit 16, turns on program input block 17.

The program entered into the device is divided into two subprograms: the subroutine of the sequence of check operatives or the subprogram of control circuits.

The subprogram of the sequence of verification operations in the parameter setting block 21 sets the command type of measurement of circuit integrity measurement {including oxygen resistance measurement, insulation resistance measurement, circuit test mode with test voltage. The same subroutine has a range of measured values.

In block 21, the task of parameters is formed by the values of the parameters of the stimulating effect and the threshold values of the measured values.

The subprogram of control circuits in encoded form represents the connection scheme of object 7, checks with verifiable chains of 6 JC group switch 1, here Pke sets the priority of the checked circuits, specified using the rank of the circuit. The rank of the circuit carries information about whether the circuit is connected to one switching module. In addition, the address code of the circuit includes another indication of the output bus number 8 or 9.

The address selector 14 decrypts the address of the next checked circuit, the code of which comes from the program input block 17. The decryption results are transmitted to the decoder 13 of the output bus splitting, to the decoder 15 of the input bus number.

Claims (2)

1. Author's certificate of the USSR W 385242, cl. G 01 R 31/02, 1973. 2. USSR author's certificate 550591, cl. G 01 R 27/16, 1977 (prototype).