JPS61161461A - Conductivity tester - Google Patents

Abstract

PURPOSE:To test precisely the conduction of a substance to be tested having many conductive groups with less labor for a short period by providing a connector, pulse generator, and an output unit, etc. CONSTITUTION:Connectors 2 on both the ends of a tested substance 1, the output unit 7 and the connectors 8, 9 of a current driver 6 are connected with each other to start the conductivity test. Consequently, a clock generated from a clock generator 3 is counted by a shift register 5 and data outputted from a data generator 4 are inputted to the register 5. When the tested substance 1 is normal, a light emitting diode lights up. On the other hand, when the tested substance 1 is disconnected, the corresponding diode is not turned on. When the tested substance 1 is in the shorted status, corresponding plural diodes are simultaneously turned on. Thus, the conduction test of the tested substance 1 can be precisely tested with less labor within a short period by applying regularly current pulses to respective conductors of the tested substance 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a continuity testing device for test objects having a large number of conductor groups, such as multicore cables, flexible wiring boards, glint wiring, and the like.

[Technical background of the invention and its problems]

Conventionally, continuity testing (specifically, disconnection testing, short-circuit testing, and wiring replacement testing) of multicore cable wiring has generally been performed using a tester.

In order to completely perform this inspection, for example, in the case of a 50-core cable, it is necessary to inspect 50 x 50 = 2500 points, which requires a great deal of time and effort, and has the drawback of lacking accuracy.

[Purpose of the invention]

The present invention has been made in order to eliminate the above-mentioned drawbacks, and provides a continuity testing device that can accurately conduct continuity testing of a test object having a large number of conductor groups in a short time and with less labor. The purpose is to

[Summary of the invention]

In order to achieve the above object, the present invention includes a test object that includes a large number of conductor groups to be tested for continuity, each conductor end having a connector, and each conductor end on one side of the test object. The connector has a connector that can be connected to and disconnected from, and has a pulse generator that regularly generates current pulses, and a connector that can be connected to and disconnected from the connector at each conductor end of the other object to be inspected. , and an output device that produces an output in response to the current/4' pulse input from the pulse generator.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of the continuity testing device. In the figure, 1 is an object to be tested that is equipped with a group of conductors to be tested for continuity, such as a multi-core cable, flexible wiring board, or printed wiring board, and connectors are electrically connected to both ends of each conductor of this object to be tested J. (plug or receptacle) 2.

3 is a clock generator that generates the clock CLOCK shown in FIG. 2; 4 is a data generator that outputs data; 5 is a shift register that counts the clock pulses of the clock generator 3; Input data from generator 4 and output terminal Q 71 Q ze Q 3.
. . . A current pulse as shown in FIG. 2 is output from Qn.

Reference numeral 6 represents a current driver provided corresponding to each output terminal Q7 to Qn of the shift register 5, and reference numeral 7 represents an output device, for example, a plurality of light emitting diodes. Reference numeral 8.9 denotes a connector (receptacle or plug) that is electrically connected to the output terminal of the current driver 6 and the output terminal of the output device 7 and that can be connected to and separated from the connector of the object to be inspected 1.

In such a configuration, the continuity test is started with the connectors 2.2 at both ends of the object to be tested 1 connected to the connectors 8.9 of the output device 7 and the current driver 6, respectively. Then, the clock generated by the clock generator 3,
At the same time, the data from the data generator 4 is input to the shift register 5 at the timing shown in FIG. 2. Therefore, the current driver 6 produces an output at the timing shown in FIG.
Through this, the light emitting diode constituting the output device 7 lights up.

When the object to be inspected l is normal, the light emitting diodes are illuminated in an orderly manner according to the timing shown in FIG. However, the object to be inspected 1
If the wire breaks, the light emitting diode corresponding to the broken wire will not light up. Also.

When the object to be inspected is short-circuited, a plurality of light emitting diodes corresponding to the short-circuited conductors are lit at the same time. Furthermore, when the conductors of the object to be inspected are replaced, the order in which the light emitting diodes are turned on is changed.

In this way, by supplying current/glucose to each conductor of the object to be inspected (in a predetermined order), continuity testing of the object to be inspected (J), i.e., disconnections, short circuits, and replacement of conductors, can be performed. Inspections can be performed accurately in a short time and with little effort.

FIG. 3 is a block diagram showing another embodiment of the continuity testing device according to the present invention. The above embodiment was carried out visually through the light emitting diode of the output device 7, but in FIG. The comparator 10 compares the data of the two, and when the two do not match, the comparator JO outputs a miswiring detection signal. In addition,
1 is a resistor, and 12 is an inverter.

Furthermore, in addition to the above-mentioned embodiments, it is also possible to install a microcomputer on the output device side to recognize incorrect wiring of the object to be inspected in place of a human being.In this way, disconnections, short circuits, and It is also possible to automatically determine whether there is a replacement.

〔Effect of the invention〕

According to the present invention described above, it is possible to do this in a short time and with less labor.
Furthermore, it is possible to provide a continuity testing device that can accurately perform continuity testing on a test object having a large number of conductor groups.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one embodiment of the continuity testing device according to the present invention, FIG. 2 is a timing chart for explaining the operation of the same embodiment, and FIG. 3 is a diagram showing other continuity testing devices according to the present invention. It is a block diagram showing an example of. ! ...Object to be inspected, 2...Connector, 3...Clock generator, 4...Data generator, 5...Shift register, 6...Current driver, 2...Output device, 8.9
... Connector, JO ... Comparator, J ... Resistor. Applicant's agent Patent attorney Takehiko Suzue Figure 1 12rM Q2 -Lo-Q3 -Sip--Qn -m-''1-

Claims (1)

[Claims] A test object is equipped with a large number of groups of conductors to be tested for continuity, each conductor end is equipped with a connector, and a connector on one side of the test object is connected to and detachable from the connector at each conductor end. , a pulse generator that regularly generates current pulses;
A continuity testing device comprising a connector that can be connected to and separated from a connector of each conductor end on the other side of the object to be tested, and an output device that generates an output in response to input of a current pulse from the pulse generator.