JPH04315781A - Detecting method for imperfect connection of cable connector - Google Patents

Abstract

PURPOSE:To abolish a conventional detection method which employs visual inspection and to detect imperfect connection electrically. CONSTITUTION:A method of detecting imperfect connection of cable connectors 60,70 is described: when the card connector 40 of a card 1 is not connected to the cable connector 60 of a cable 80, an alarm circuit 12 for detecting connection of a card 11 detects imperfect connection and an alarm display 20 emits an alarm; when the card connector 50 of the card 11 is not connected to the cable connector 70 of the cable 80, an alarm circuit 2 for detecting connection of the card 1 detects imperfect connection and an alarm display 10 emits an alarm.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a method for detecting incomplete connection between a cable connector and a circuit side connector.
In particular, the present invention relates to a method for detecting an incomplete connection state in which only one side of a cable is not connected.

0002

2. Description of the Related Art Conventionally, when electrically connecting two separate circuits, for example, two logic circuits such as integrated circuits, using a cable or the like, a male (or female) connector is connected at both ends of the cable. Attach the female (or male) connector (the signal wire led from the logic circuit is fixedly connected to the connector terminal of the card in advance) to the card (logic circuit mounting board) on which the logic circuit is mounted, and connect the cable connector. This is generally done by connecting the male (or female) to the female (or male) of the card connector. This is because there are advantages such as the ability to easily replace cards on which circuit components are mounted.

0003

[Problems to be Solved by the Invention] The method of connecting circuits using such connectors has the advantage that circuits can be easily connected and separated, but it also has the advantage that circuits may malfunction due to incomplete connection of the connector part. This indicates that it may cause A typical example of this case is forgetting to connect a connector. Even if one end of the cable and the card on which the circuit is mounted are securely connected at the connector part, if the cable connector at the other end and the card connector are not connected, the circuit will not operate properly. Also, if both ends of the cable are not connected to the card, the circuit will not operate normally, just as if only one end of the cable is not connected.

However, when both ends of a cable are not connected, it also includes cases where the connection is not intentional, that is, cases where there is no problem in circuit operation.
There are "cases in which connection is necessary" and "normal cases in which there is no need to connect." Therefore, cases where the cable is not connected intentionally and cases where the connectors at both ends that should have been connected are both disconnected appear to be in the same state, so a detection means etc. is provided to distinguish between these cases. It's not easy to do. Then, a case where only one end of the cable connector is connected to the card and the other end is disconnected can be considered to be "a case where the operation of the circuit becomes abnormal." This is because it is generally inconceivable that intentionally disconnecting only one side of a cable would indicate circuit operation.

[0005] Conventionally, therefore, the means used to detect such an abnormal state was solely the visual inspection method of technology, but a card equipped with a logic circuit to which dozens of cable connectors etc. are connected is used. There are tens of cables, etc., and there are places where hundreds of cables are folded over each other (
(e.g., card mounting cages), it may be difficult to detect a cable connector that has become disconnected from the card without any warning means.

It is an object of the present invention to take the method of checking for incomplete connections on one side of a cable connector one step further, which has relied solely on human visual inspection, and to improve circuits in which only one end of the cable connector should be properly connected. The object of the present invention is to provide a means for detecting this and a means for giving a warning when the card is not connected to the connector on the side card.

[0007]

[Means for Solving the Problems] The present invention provides a cable connector for testing by connecting connecting means between circuits having connectors at both ends of a wire or cable and connectors of first and second circuit sections, respectively. The incomplete connection detection method includes a detection means for detecting that either one of the connectors of the first or second circuit section is in an unconnected state.

[0008] Further, the detection means is provided in each of the first and second circuit sections, and the detection means on the first circuit side connects the connector of the connection means and the connector on the second circuit side. detecting an unconnected state, and detecting the second
The detecting means on the circuit side detects an unconnected state between the connector of the connecting means and the connector on the first circuit side, and the detecting means detects that the connecting means is also connected to the first and second circuit parts. When connected, it outputs logic "0"; when it is connected only to either the first or second circuit section, it outputs logic "1"; Logic “0” when not connected to any of the circuit parts
and a warning display section that warns that the connector is in an incompletely connected state when the output of the connection state detecting section is logic "1".

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a circuit diagram showing an embodiment of the present invention. Before explaining the present invention, a supplementary explanation will be given first about the logic circuit symbols used in FIG. 1. When the inputs of NOT circuits 4 and 14 and AND circuits 5 and 15 are electrically released (open), the same effect as when logic "1" is input is performed, and when grounded (GND), logic "0". Further, the lamp drive circuits (LAMPDR) 6 and 16 operate to light the lamp (LAMP) 7 or 17 when the input is logic "1". Also, symbol 41
-43, 51-53 are card connector terminals (female), and symbols 61-63, 71-73 are cable connector terminals (male).

FIG. 1 shows a functional circuit 3 for realizing a so-called normal function, a connection state detection warning circuit 2 consisting of a connection state detection logic circuit and a warning indicator, and the input signals of these circuits are connected to a cable connector. A card 1 equipped with a card connector 40 for the purpose and similar circuits 13 and 1
There is a card 11 equipped with two connectors 50, a cable 80 for connecting these cards, and cable connectors 60 and 70 at both ends, and these cable connectors and cards 1 and 11 are connected. FIG. 3 is a circuit configuration diagram showing a state in which the

Further, the cable 80 has several wires (three wires in FIG. 1) for connecting the functional circuits 3 and 13, and conducting wires 81 and 82 for detecting the connection state of the cable. The conducting wire 81 is connected to the terminal 62 and the terminal 73, and the conducting wire 82 is connected to the terminal 63 and the terminal 72, and the physical positional relationship of the terminals is the same, and the two conducting wires intersect. (Conductor 8
1 and 82 are twisted) This is to maintain compatibility between the left and right connectors. The terminal 61 is connected to the terminal 62, and the terminal 71 is connected to the terminal 72, but the terminal 61 and the terminal 71 are not connected.

FIGS. 2, 3, and 4 are simplified versions of the circuit diagram shown in FIG. 1, and are examples showing the connection relationship between the card 1 and the card 11.

[0014] When the connection state is divided into diagrams, FIG. 1 shows a connection state in which the card 1 and the card 11 are not connected at both ends of the cable. In FIG. 2, the card connector 40 of the card 1 and the cable connector 60 are connected, and the card connector 50 and the cable connector 70 of the card 11 are connected.
This shows the correct connection status. In FIG. 3, the card connector 40 of the card 1 and the cable connector 60 are connected, but the card connector 5 of the card 11 is connected.
This shows an incorrect connection state in which the cable connector 70 and the cable connector 70 are not connected. FIG. 4 also shows an incorrect connection state in which the card connector 50 of the card 11 and the cable connector 70 are connected, but the card connector 40 of the card 1 and the cable connector 60 are not connected.

Next, FIG. 5 is a diagram showing these connection states and warning lamp lighting conditions that must be detected according to the connection states. A specific example of a method for generating warning lamp lighting conditions using a logic circuit will be described with reference to FIG. First, when both of the cards with status number 1 are not connected, the input of the NOT circuit 4 of card 1 is logic "1" and the output is logic "0". Since the input side of the AND circuit 5 to which the output of the NOT circuit 4 is connected becomes logic "0", its output also becomes logic "0", LAMPDR6 is not driven, and LAMP7 is not lit. The same applies to the card 11 side.

Next, in the case shown in state number 2, that is,
When both connectors 60 and 70 of the cable are connected to the respective connectors 40 and 50 of cards 1 and 11, one AND input 9 of the AND circuit of card 11 is connected to the ground (GND) of card 11 at terminal 51, Since it is supplied via the terminal 72, conductor 82, terminal 63, and terminal 43, it becomes logic "0". Therefore, the input of LAMP is logic “0”
”, LAMPDR6 is not driven and LAMP7 is not lit. The same goes for the card 11 side.

Next, in the case shown in condition number 3, that is,
When the cable connector 40 is connected only to the card connector 60, the input of the NOT circuit 4 of the card 1 is that the ground (GND) of the card 1 is connected to the terminal 41, the terminal 61, and the terminal 62.
Since it is supplied via the terminal 42 and the terminal 42, it becomes logic "0". Therefore, the terminal of the NOT circuit 4 becomes logic "1", and both inputs of the AND circuit 5 become logic "1",
The output of the AND circuit 5 also becomes logic "1". Therefore, L.A.
MPDR is driven and LAMP7 lights up. Note that the LAMP 17 on the card 11 side does not light up because the input of the NOT circuit 14 is logic "1" and both the input and output of the AND circuit 15 are logic "0". That is, when the connection of the connector on the card 11 side is incomplete, the lamp on the card 1 side lights up to indicate the connection abnormality and give a warning.

Finally, in the case shown in status number 4, that is, when the cable connector 50 is connected only to the card connector 70, the input of the NOT circuit 14 of the card 11 is such that the ground (GND) of the card 11 is connected to the terminal 51. , terminal 71,
Since it is supplied via the terminal 72 and the terminal 52, it becomes logic "0". Therefore, the output of the NOT circuit 14 becomes logic "1", and both inputs of the AND circuit 15 become logic "1".
”, and the output of the AND circuit 15 also becomes logic “1”. Therefore, the LAMPDR 16 is driven and the LAMP 17 lights up. Note that the LAMP 7 on the card 1 side is connected to the NOT circuit 4.
Since the input of the AND circuit 5 is logic "1" and both the input and output of the AND circuit 5 are logic "0", it does not light up. In other words, status item number 3
On the contrary, if the connection of the connector on the card 1 side is incomplete, the lamp on the card 11 side lights up to indicate the connection abnormality and give a warning.

In the case of status number 3 or 4, instead of the warning lamp, the warning signal 8 or 18 can be collected by, for example, an OR circuit and displayed on a maintenance operation panel, or an operator call bell can be sounded. or L in Figure 1.
There is also a method of providing a buzzer or the like in place of the AMP7 or LAMP17 and giving audible warning directly at the location.

[0020]

As described above, the present invention has the effect that the connection state of the cable connector can be easily determined because a circuit is provided to issue a warning when an incomplete connection state of the cable connector is detected. Particularly in equipment used in places with a lot of vibration, if a failure occurs such as one end of a cable connector inside the equipment coming off during use, the incomplete connection can be immediately known, allowing you to identify the cause of the failure. It has the advantage that it can be done easily.

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing different types of connection relationships between cards and cables in FIG. 1;

FIG. 3 is a diagram showing different types of connection relationships between the cards and cables in FIG. 1;

FIG. 4 is a diagram showing different types of connection relationships between the cards and cables in FIG. 1;

FIG. 5 is a diagram showing the connection relationships in FIGS. 1 to 4. FIG.

[Explanation of symbols]

1, 11 Card 2, 12 Connection status detection warning circuit 3, 13
Functional circuit 4, 14 NOT circuit 5, 15 AND circuit 6, 16 Lamp drive circuit (LAMPDR) 7,
17 LAMP 8, 18 Warning signal 9, 19 AND input 10, 20 Warning indicator 40, 50 Card connector 41-43, 51-53 Terminal (female) 60, 7
0 Cable connector 61-63, 71-73 Terminal (male) 80
Cable 81, 82 conductor wire

Claims (3)

[Claims] Claim 1: A method for detecting incomplete connection of a cable connector, in which connecting means between circuits having connectors at both ends of a wire or cable and connectors of first and second circuit parts are respectively connected and tested. A cable connector incomplete connection detection method, comprising a detection means for detecting that either one of the connectors of the first or second circuit section is in an unconnected state. 2. The detection means is provided in each of the first and second circuit sections, and the detection means on the first circuit side connects the connector of the connection means and the connector on the second circuit side. 2. An unconnected state is detected, and the detecting means on the second circuit side detects an unconnected state between the connector of the connecting means and the connector on the first circuit side. Cable connector incomplete connection detection method described. 3. The detection means detects a logic "0" when the connection means is connected to both the first and second circuit sections.
”, and if it is connected to only one of the first or second circuit section, it outputs logic "1" and is not connected to either the first or second circuit section. A connection state detection section that outputs a logic "0" if the connection state detection section is present, and a warning display section that warns that the connector is in an incompletely connected state when the output of the connection state detection section is a logic "1". The cable connector incomplete connection detection method according to claim 1 or 2, characterized in that: