JPH03242568A - Apparatus for testing cable with connector - Google Patents

Abstract

PURPOSE:To test a cable body and connector connection by providing a connector box equipped with counterpart connectors, an exciting apparatus of the connector box, an apparatus for measuring change in resistance of a cable with connectors and an apparatus for displaying an amount of change in a loop resistance value. CONSTITUTION:Connectors 5, 5 of a cable 3 with connectors are connected to counterpart connectors 21, 21 of a connector box 11, and an exciting apparatus 12 is operated by a startup instruction of an operation input unit 44. An exciting table 31 vibrates in an X-direction or in a Y-direction for a constant time period, while an amount of change in loop resistance of the cable 3 with connectors is measured and displayed on a display unit 45. Whether the amount of change has exceeded a reference amount is indicated by lighting of an indication lamp 14 or 15.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a test device for cables with connectors used for mutually connecting computers, terminal devices, peripheral devices, or other equipment, etc., which ensures reliable connection between the cable body and the connector. The purpose of this test is to provide a testing device for cables with connectors that can easily and reliably test whether the cables are properly connected to connectors or whether foreign substances are mixed in. The apparatus includes a connector box to which a mating connector to which the connector can be connected is attached, a vibrating device that applies vibration to the connector box, and a resistor that measures changes in the loop resistance value of the cable with the connector. It is configured to include a change measuring device and a display device that displays a display according to the amount of change in the loop resistance value.

[Industrial application field]

The present invention relates to a test device for cables with connectors used for interconnecting computers, terminal devices, peripheral devices, or other devices.

In recent years, data communication systems in which a computer and a large number of terminal devices are connected through communication lines have become rapidly popular.

In general, cables with connectors that have connectors connected to both ends or one end are often used as lines for communication lines, but if a fault such as a poor connection occurs in the cable with a connector, the line may be damaged. There is a risk that connected computers and terminal devices may malfunction, and this, combined with the increasing number of multiplexed lines, has an extremely large social impact.

Therefore, it is extremely important to thoroughly check whether the cable with a connector will cause problems such as poor contact.

[Prior Art] As described above, a connector is connected to the end of a cable used as a communication line for connection to a terminal box or equipment.

In many cases, such cables with connectors are laid along buildings on site, so the length of the cable body is cut to match on site, and connectors are connected to both ends by soldering on site. There are many things.

At that time, defective soldering or foreign objects such as solder shavings, broken wires, or machine screws may remain inside the connector. Even if there is no abnormality, various noises may be generated during use, or various failures may occur, such as an increase in line resistance, line interruption, or line short circuit.

Conventionally, the only way to check whether the cable body and the connector have been reliably connected and whether there is no short circuit between tvA and the like due to a foreign object is to perform a continuity test using a circuit tester or the like.

It has also been attempted to hit the installed cable body or connector with a mallet or the like.

The purpose is to provide equipment.

[Problem to be solved by the invention]

However, even if the continuity test using a circuit tester shows that the connector is normal, a failure may occur when the connector is actually connected to a terminal box or equipment, or a failure may suddenly occur during use. It was not possible to discover any defective soldering or residual foreign matter that could be the cause.

In addition, testing by hitting cables with a mallet relies on the personal experience and intuition of the operator, so anyone can reliably detect defects in cables with connectors. I'm not going. As a result, it was not possible to conduct a complete test of the cable with a connector, which caused problems during use.

In view of the above-mentioned problems, the present invention provides a test method for cables with connectors that can easily and reliably test whether the connection between the cable body and the connector is secure, and whether foreign matter is mixed in. [Means for Solving the Problems] In order to solve the above-mentioned problems, the test device according to the present invention has the following features:
As shown in FIG. 1, a test device 1 for a cable with a connector 3 to which a connector 5 is connected includes a connector box 11 to which a mating connector 21 to which the connector 5 can be connected is attached, and a connector box 11 to which a mating connector 21 to which the connector 5 can be connected is attached. box 11
a vibration excitation device 12 that applies vibration to the connector, a resistance change measuring device 13 that measures a change in the loop resistance value of the cable 3 with a connector, and a display device 14 and 15 that displays a display according to the amount of change in the loop resistance value. .16.45.

[For production]

The connector 5 of the cable with connector 3 to be tested is connected to the connector box 11, and in this state, the vibration device 1 is connected to the connector box 11.
2 adds vibration.

During this time, the change in the loop resistance value of the cable with connector 3 is measured by the resistance change measuring section 13, and the display device 14, 15, 16, 45, etc. displays a display according to the amount of change.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a test apparatus 1 showing an embodiment of the present invention, and FIG. 2 is a perspective view of the test apparatus 1.

In these figures, the test device 1 includes a connector box 11 and a vibrating device I that applies vibration to the connector box 11.
2. Resistance change measuring section 13 that measures the change in loop resistance value Rffi of cable with connector 3, loop resistance value 1'l
It is easily portable and consists of an indicator light 14 that displays a warning when the amount of change in the amount exceeds the standard amount, an alarm buzzer 16, and an indicator light 15 that displays a pass when the amount of change is less than the standard amount. can be delivered to the site.

The cable with a connector 3 is laid inside a building and used as a line for a communication line, and includes, for example, a cable main body 4 consisting of two electric wires 4a and 4b,
It consists of connectors 5.5 connected to both ends of each electric wire 4a, 4b by soldering.

A mating connector 21, 21 to which the connector 5 described above can be connected, and a relay connector 22 are attached to the connector box E1. − side mating connector 2
1 has both poles short-circuited to each other, and both poles of the other mating connector 21 are respectively connected to a relay connector 22 and connected to the resistance measuring section 41 of the resistance change measuring section 13 via a relay cable 23.

The vibration device 12 is a known device that includes a variable speed motor (not shown) and a movement direction converting device driven by the motor, and vibrates the vibration table 31 in the X direction or the Y direction within a horizontal plane. The vibration frequency is, for example, 1 to 20
Hz, the amplitude is 0 to several millimeters in each direction, and the switching of the vibration direction, frequency and amplitude! Ill
! is possible. It is also possible to sweep the frequency and amplitude. Note that the connector box 11 is fixed to the vibration table 31 by a detachable hand 32.

The resistance change measuring section 13 includes a resistance measuring section 41 and a deviation measuring section 4.
2, a control section 43, a manual operation section 44, a display section 45, etc.

The resistance measuring section 41 measures and outputs the loop resistance value R1 of the cable with connector 3 at regular intervals, for example every few milliseconds, by sampling.

The deviation measuring section 42 detects and outputs the amount of change Rv in the loop resistance value RE output from the resistance measuring section 41. The change 11Rv is, for example, the difference between the maximum value and the minimum value of the input loop resistance values R1, the maximum deviation from the standard value, the average value (or maximum value, minimum value, standard value, etc.) of those loop resistance values R2. Loop resistance value Rf within unit time
It is determined as the maximum value of the deviation of fi.

The control unit 43 controls the loop resistance (ii!Rf and the amount of change RV
is displayed on the display unit 45, and when the change JiRv exceeds a preset standard 11Rs, for example, when the difference between the maximum value and the minimum value of the loop resistance value R1 exceeds 10% of the minimum value, the is displayed on the display section 45, and the indicator light 1
4 and sounds the alarm buzzer 16.

The control unit 43 also controls the entire test apparatus 1 and operates the vibration device 12 for a certain period of time, for example, several seconds to more than ten minutes in one test, during which the above-mentioned measurements are performed. The amount of change Rv is controlled as follows, and the amount of change Rv is the reference amount Rs.
If it is below, the indicator light 15 is turned on.

The operation input section 44 is for inputting data such as the type and length of the cable with connector 3, and also for inputting the vibration mode and start-up command of the test apparatus 1. Note that the standard value or reference amount Rs of the loop resistance value Rf is determined by the operation input section 4.
4 may be set or changed based on manually input data.

The display section 45 displays necessary messages in addition to the above-mentioned displays.

Therefore, the connectors 5 and 5 of the cable with connector 3 are connected to the mating connectors 21 and 21 of the connector box 11, and the vibration device 1 is
2, the vibration table 31 vibrates in the X or Y direction for a certain period of time, and the amount of change Rv in the loop resistance value Rffi of the cable with connector 3 during that period is measured, and the measurement result is displayed on the display section 45. Indicator light 1 is displayed depending on whether the amount of change Rv exceeds the reference amount Rs.
4 or the indicator light 15 lights up and the alarm buzzer 16 sounds.

In addition, after the vibration test in the X direction or Y direction is completed, -
First, the band 32 is loosened, the connector box 11 is rotated 90 degrees, and the same test is performed on the Z direction of the connector box 11.

As a result, a vibration test is performed with the cable 3 with a connector actually connected to the mating connector 21, and defects in the cable 3 with a connector, such as poor soldering between the cable body 4 and the connector 5, or foreign matter mixed in, are detected. 6. Also, if the test result indicator light 15 lights up, it means that the cable body 4 and the connector 5 have been properly soldered, and there is no harmful foreign material mixed in. This can be confirmed, and it can be used as a communication line with peace of mind.

In the above-described embodiment, when the cable with connector 3 has three or more cores, the inside of the connector box 11 may be connected so that, for example, a test is performed for every even number of T-wires.

When the connector 5 is connected only to one end of the cable 3 with a connector, the other end may be short-circuited.

Furthermore, the cable 3 with a connector 3 may be connected so as to be tested by measuring the loop resistance value Rffi from the connector 5 at one end to the connector 5 at the other end. If the number of wires is large, connect the cable with connector 3 to the line via the connector box 11, and test whether a failure occurs while using the cable with connector 3 for a test purpose (online state). Good too.

In the embodiment described above, by attaching various multi-pole connectors to the connector box 11, it is possible to easily test different types of cables 3 with connectors.

The deviation measuring section 42 calculates the base 1! according to the loop resistance value Rffi measured by the resistance measuring section 41 before applying the vibration. The value may also be set manually.

Either the indicator light 14, 15 or the alarm buzzer 16 may be omitted. Alternatively, the results of the variation Rv may be displayed by printing them using a printer. Alternatively, the test time may be determined manually by turning on and off the power of the test apparatus 1 at the bottom of the tank.

The resistance measuring section 41, the deviation measuring section 42, the control section 43, etc.
suitable analog circuitry or microprocessor, A
This can be easily realized using a D converter and a memory in which an appropriate program is stored.

The connector box IL excitation device 12, resistance change measurement unit 13, etc. described above can be modified in various ways, and such a test device 1 can be applied to tests of cables with connectors used for various purposes. .

〔Effect of the invention〕

According to the present invention, it is possible to easily and reliably test whether the cable body and the connector are connected reliably or whether foreign matter is mixed in.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a test device showing an embodiment of the present invention, and FIG. 2 is a perspective view of the test device. In the figure, 1 is a test device, 3 is a cable with a connector, 5 is a connector, 11 is a connector box, 12 is an excitation device, 13 is a resistance change measurement unit (resistance change measurement device), 14 is an indicator light (display device) , 15 is an indicator light (display device), 16 is an alarm buzzer (display device), 21 is a mating connector, and 45 is a display section (display device).

Claims (1)

[Claims] (1) A test device (1) for a cable with a connector (3) to which a connector (5) is connected, and a connector box to which a mating connector (21) to which the connector (5) can be connected is attached. (11); a vibrator (12) that applies vibration to the connector box (11); a resistance change measuring device (13) that measures a change in loop resistance of the cable with connector (3); A test device for a cable with a connector, comprising display devices (14), (15), (16), and (45) that display information according to the amount of change in resistance value.