SU877567A1 - Device for checking wiring - Google Patents

Description

(54) DEVICE FOR INSTALLATION CONTROL

G. The invention relates to information and measuring and computing techniques and can be used in automatic installations for checking the correctness of electrical installation and control of printed circuit boards. A device for controlling the correctness of electrical connections of a scientific research institute is known, consisting of a software unit of a sensing device, signal switches, a control circuit, and error fixing blocks. The closest to the present invention is a device for automatically checking installation, containing an input unit, an input signal switch, a polling switch. , analysis scheme, N check schemes G23. The drawback of the device is the sequential interrogation of all control points for the presence of spurious connections and the absence of the necessary control point relative to the reference point (for an analogue, a similar operation is performed at a selected control level), which leads to non-productive loss of control time and equipment complexity. The purpose of the invention is to increase the speed of the device. The goal is achieved by the fact that the device for controlling the installation, containing an input switch, the output of which is connected to the control object's input, and the Poll switch and the analysis and control unit connected in series, additionally contains two control points address input blocks, a registration block and two address registers, connected to the outputs of the inputs of the registration unit, the control inputs with the first outputs of the analysis and control unit, and the information inputs with the first outputs of the first and second blocks of the addr The control points connected by inputs to the second outputs of the analysis and control unit, and the second outputs - to the second inputs of the interrogation switch, the third output of the first input block of addresses of control points connected to the second input of the input switches. The drawing is given functional. device schema. The device contains a switch, 1 (inputs, object 2 controls, switch 3 polling, unit 4 analysis and control, the second outputs 5 and 6 of the unit of analysis and control, the first 7 and second 8 blocks of input addresses of control points, the first outputs 9 and 10 of the analysis unit and control, the first 11 and second 12 registers: addresses, registration block 13, second outputs 14 of the first and 15 second blocks of entering addresses of control points, first outputs 16 of the first and 17 second blocks of entering addresses of control points, the third, output 18 of the first block of addresses input control points.

The device is pa (it works as follows.

The monitoring process includes three modes: short circuit detection mode, diagnostic short circuit localization mode, which is used only for short circuit detection, and open circuit detection and localization mode.

The test starts with a short circuit detection mode. On the second output 5, the analysis and control unit 4 initiates the operation of the first input unit, which on the third output 18 transmits the address of the current control point. At this address, through the switch 1 of the inputs, the excitation signal is applied to object 2 of the control. This signal is given during the entire period of checking the breaks and short circuits associated with this point (in all three test modes). At this time, the second output 14 of the first input unit 7 simultaneously transmits the control point addresses to which the control point belongs. The polling switch 3 prohibits the removal of signals from control points of the circuit and, on the contrary, allows the removal of signals from all other points.

The signals arriving at the unit, 4 analyzes and controls, indicate the presence of a short circuit of this test point with one or several points of the test object and a transition to the diagnostic mode of short circuit localization (otherwise, the transition to the breaks will occur ).

The second input unit 8 is used only in the diagnostic mode of short-circuit localization. From the analysis and control unit 4, the second output 6 is given a control signal that initiates the operation of the second input unit 8. To receive this signal, the second input block 8 sequentially iterates through all the controls.

 points of object 2 of control, transmitting their addresses on the second output 15 to switch 3 of the survey, which allows the removal of the signal to the analysis and control circuit from the control only

point corresponding to the incoming address. If the signal passes through the polling switch 3 to the analysis and control unit 4, the latter generates a print trigger signal on the first output 10, and the corresponding address is transmitted on the first output 17 of the second input unit, through the second address register 12 enters the registration block 13 and prints . After this mode, the registration block contains the addresses of control points associated with this one, among which there are also false ones.

At the end of the diagnostic mode of short-circuit localization (or stepping over it, in case of successful completion of the short-circuit detection mode), the signal from the second output 5 of the analysis and control unit 4 begins the detection and localization of open circuits.

In this mode, breaks between the controlled point under consideration and each point of a given circuit are checked. For each check cycle from the first input unit 7 on the second output 14, all the addresses of the control points of the circuit are simultaneously fed to the interrogation switch 3, except for the address of the considered control point and the point against which the break is checked. In the case of the absence of a signal from the polling switch 3, the analysis and control unit 1 issues an enabling signal on the first output 16 through the first address register 11 is fed to the registration unit 13 and. printed out.

Thus, in the absence of breaks and short wiring of electrical connections, the test time consists of: one test cycle for short circuit and (k – l) test cycles for open circuit, where k is the number of test points of the circuit to which the test point belongs.

In the proposed device, the first and second blocks of inputting control point addresses can be represented by film projectors, then the inspection programs of the test object are applied to the film in the form of transparent sections through which the light passes to the photodiode array, which is used as input and poll switches and enables or disables passing signals from the control object to the analysis and control circuit.

In order to control the operation of the device, one of the lines is provided in the frame, where the control commands and the corresponding series of photodiodes are written in the matrix in the binary code.

Total inspection time of the object at 1200 points and 120 circuits assuming that there are no installation errors and frequencies

frames 24 frames per second, will be 30 s.

Claims (2)

1. Automatic control of electronic and electrical equipment. Ed. V.M. Shl ndi5 on. M., Energie, 1972, p. 233-234. 2. Authors certificate of the USSR 342189, cl. G 06 F 11/00, 1970 (prototype).