JPS61155967A - Circuit for detecting and displaying connection abnormality of multi-core cable connector - Google Patents

Abstract

PURPOSE:To synthetically detect the detachment and erroneous connection of a connector, by constituting a route making a round by one or two core wires in the multi-core cable connected to a printed circuit board and transmitting a pulse signal onto said route. CONSTITUTION:Cables 101-105 are connected to the connectors 10-15 of printed circuit boards 1, 2 and one or two of said cables 101-105 is connected by the wirings 102, 104 of the boards 1, 2 to constitute a round route issued from the board 1 and returned thereto. A self-exciting oscillator 19 and a comparator 20 are provided to the board 1 and the oscillator 19 is operated at the time of testing. When all of cables 101-105 are connected accurately, a comparing output 108 is almost '1' because signals 100, 107 are almost the same phase and a display device 21 always lights. When there is detachment or erroneous connection, the display device 21 is put ON and OFF.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detection circuit for a plurality of multi-core cable connection abnormalities in an information processing device, and particularly to a multi-core cable connector connection circuit for detecting and displaying disconnection of a connector and incorrect connection of a connector. The present invention relates to an abnormality detection and display circuit.

[Conventional technology]

Conventionally, it has been possible to detect mere disconnection of a connector of a multi-core cable used for internal connection in information processing apparatuses, as shown in FIG. That is, even if either the cable 302 or the connected connector 30 or 31 is disconnected, the signal 300 is grounded by the resistor 32, so it becomes the output signal 301t'i'''1# of the receiver 33, and an abnormality can be detected. Signal 301 when normal in
is “0”.

[Problems to be solved]

In the conventional circuit for detecting connector connection abnormalities of multi-core cables as described above, if there are multiple cables, multiple circuits shown in Figure #I2 are required, and in order to detect incorrect connection of multiple cables, It cannot be detected by the circuit shown in the second step, and has to be detected by a special test program.

For this reason, there have been problems in that disconnection of the connector and incorrect connection of the connector cannot be uniformly detected, and it is also difficult to indicate abnormalities.

The present invention solves the above-mentioned problems, and aims to provide a multi-core cable connector connection abnormality detection and display circuit that can uniformly detect and display disconnection and erroneous connection of connectors.

Solution to Problem C] The structure of the multi-core cable connector connection abnormality detection display circuit according to the present invention to achieve the above-mentioned object of the present invention is connected to a circuit board by a detachable multi-pole connector, and each has a different configuration. A pulse oscillation means that continuously oscillates a multi-core Cales signal whose path is made up of one or two numbered core wires, and converts the pulse signal oscillated by the pulse oscillation means into a current pulse to generate a current pulse. a transmitting means for transmitting from one side of the route, a receiving means for receiving a signal returned from the other side of the loop path, and a comparing means for comparing the signal received by the receiving means with the PAL 2 signal oscillated by the pulse oscillating means. and a display means for displaying the results based on the comparison means.

C Effect] In the present invention, a circuit path is created using core wires with different numbers in a plurality of multi-core cables, and continuous current pulses are passed through this path to prevent disconnection or incorrect connection at the connector portion. When the current pulse is emitted, the current pulse cannot pass through, which is used to detect an abnormality, and the display unit blinks to notify of the abnormality.

〔Example〕

Next, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a circuit diagram showing an embodiment of a multi-core cable connector connection abnormality detection and display circuit according to the present invention.

1.2 in the figure is a circuit board, and the multi-core cable connector connection abnormality detection display circuit of this embodiment is mainly connected to the connector 1.
0-15. Resistance 16. Current type driver 17 as transmitting means. Current type receiver 18 as receiving means. Self-excited oscillator as pulse oscillation means 19. It is composed of a comparator 20 as a comparison means and a display 21 as a display means.

The output pulse signal 100 of the self-excited oscillator 19 is converted into a current pulse by the current type driver 17, and
and then connect to the first pin of the connector 10. Resistor 16 is a protection resistor. Further, the first pin of the connector 10 is connected to the first core wire of the cable 101,
Furthermore, it is connected to the first pin of the connector 11. The first pin of connector 11 is connected to the second pin of connector 13 by wiring 102. This connector 13
The 02nd pin is connected to the 2nd core wire of the cable 103 and further connected to the 2nd pin of the connector 120. This is from the second pin of connector 12 to wire 1
04, it is connected to the connector No. 1403 at the C molar.

The third pin of the connector 140 is connected to the third core wire of the cable 1050, and further connected to the third pin of the connector 15. The third pin of connector 150 is connected to the fourth pin of the same connector 1506 by wiring 106.

The fourth pin of the connector 15 is connected to the fourth core of the same cable 105, and further connected to the fourth pin of the connector 405. The fourth pin of connector 14 connects to current type receiver 18.

In addition, in this embodiment, cables 10503rd and 4th 2nd
Although I used 1 core wire, depending on the number of cables, 1
Just use the core wire of the book.

The output signal 107 of the current type receiver 18 is sent to the comparator 20
is applied to one input of the comparator 20, and the output pulse signal 100 of the self-excited oscillator 19 is applied to the other input of the comparator 20.

If all the cables are connected correctly as shown in FIG. 1, the signals 100 and 107 are almost in phase, with only a difference due to the propagation delay of the cables, etc. Therefore, the output signal 108 of the comparator 20 is almost 1#, and the display 21 to which the signal 108 is input appears to be always lit.

However, if the circuit route is interrupted due to detachment or incorrect connection of the connectors 10 to 15, the signal output from the current type driver 17 will not reach the current receiver 18.
The output signal 107 of the current type receiver 18 is "0#".

Here, the output signal 100 of the self-excited oscillator 19 is periodically
0# and '1'', the output signal 108 of the comparator 20
also becomes 'l' and '0#' in synchronization with the signal 100. Therefore, the display 21 blinks.

If all the connectors of the multi-core cable targeted by this trap are normal, the indicator 21 will be lit, but
If the connector is disconnected or incorrectly connected, the indicator 21 blinks to notify the abnormality.

〔Effect of the invention〕

As explained above, according to the multi-core cable connector connection abnormality detection and display circuit according to the present invention, a loop route is created using core wires with different numbers in a plurality of multi-core cables, and from one side of the line Transmit continuous current-driven pulses, receive from the other side, and now pulse fPM- pulse J-)+
This has the effect of uniformly detecting and displaying disconnection and incorrect connection of the connector from just one force when entering the connector.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a multi-core cable connector connection abnormality detection and display circuit according to the present invention. The faz diagram is a circuit diagram for detecting a connector connection abnormality of a conventional multi-core cable. 1.2...Circuit board

Claims (1)

[Claims] A multi-core cable is connected to a circuit board by a removable multi-pole connector, and has a route made up of one or two core wires each having a different number. A pulse oscillation means that continuously oscillates a pulse signal, a transmission means that converts the pulse signal oscillated by the pulse oscillation means into a current pulse and transmits it from one of the one path, and a signal returned from the other side of the one path. a receiving means for receiving the signal, a comparing means for comparing the signal received by the receiving means with a pulse signal oscillated by the pulse oscillating means, and a display means for displaying a result based on the result of the comparing means. A multi-core cable connector connection abnormality detection display circuit featuring: