JPS59119281A - Test system for electric connection part - Google Patents

Abstract

PURPOSE:To test the quality of electric connection by flowing a current to a part which is connected by soldering or wire wrapping, and leading out, amplifying, and displaying the electric AC variation of a current in flowing when the connection part is vibrated mechanically. CONSTITUTION:A test part is encircled with a dashed line, and 6 is the part of coaxial cord including a plug for a body to be tested; and Rw is the conductor resistance of the coaxial cored and Rx is the connection resistance of two soldering parts 7 and 8. A tester 1 consists of a battery power source 11, output lead-out resistance 12, DC stopping capacitor 13, AC amplifier 14, rectifying circuit 15, and display device 16. When a current is flowed through a conductor to vibrates the connection parts 7 and 8 mechanically, the Rx varies if there is a connection defect, so the voltage across a resistance varies and is detected and displayed as an AC component through a capacitor 13. This method simplifies the test of the connection parts and shortens the test time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for electrically testing the integrity of the connection when conductors are connected by soldering, wire wrapping, etc.

When connecting conductors by soldering, wire wrapping, etc., a particular problem arises if the connection is perfect.
The electric circuit fully performs the function assigned to it, but if it is incomplete, it will malfunction and stop functioning, and the electric circuit will no longer be able to perform its assigned function. Especially in communication lines, it is no exaggeration to say that the quality of the line is affected by the connection state, and it is necessary to ensure the connection.

Generally, when testing the connection status, the actual electrical circuit is operated and external mechanical vibration is applied to the connection part. Because they often have multiple functions, testing takes a long time and poor connections may be missed.

An object of the present invention is to provide a simple, quick and reliable method for testing electrical connections.

To explain the configuration of the present invention, the present invention constitutes a closed circuit by a connection part to be tested between a power source and a conductor, and a resistor for variable measurement current and output extraction, and allows direct current to flow through the connection part to be tested. While applying mechanical vibration to this connection part, an electrical alternating current varying voltage is extracted from the output extraction resistor, and this alternating current varying voltage is amplified, rectified, and the obtained direct current voltage is displayed on the display. This is a test method for electrical connections.

The present invention will be explained below by way of examples with reference to the drawings.

The object to be tested in this example is a coaxial cord that connects electronic devices, and the parts to be tested are the core wire of the coaxial cord and the center of the coaxial plug connected to both ends of the coaxial cord. Solder to the conductor only at one point.

The above-mentioned test object and test location are explained using a drawing.
The coaxial cord of this test object is as shown at 6 in FIG.
, 5 are connected. Next, to explain the parts to be tested, the part where one of the above-mentioned coaxial plugs 4 and 5 is connected to the coaxial cord 6 will be described. This is the first
To explain the diagram, the coaxial plug 5 has a center conductor 9, the coaxial cord 6 has a core wire 1o in the center, and the center conductor 9 and core wire 1o are connected at a location 8 inside the plug 5. It is soldered. The test will be performed on this soldering part 8.
The completeness of electrical connectivity.

Next, the method for electrically testing the connection between the coaxial cord 6 and the coaxial plugs 4 and 5 described above is performed as shown in FIG. That is, 1 is a tester, and on both sides of this tester 1, outlets 2 and 3 for connection with plugs 4 and 5 are provided,
During the test, the plugs 4 and 5 at both ends of the coaxial cord 6 are connected to the connection outlets 2 and 3 of the tester 1, respectively.

Now, the details of how to conduct a test by connecting the test object to the tester in this way will be explained with reference to FIG.

In Fig. 3, the part surrounded by the dashed line is the part of the tester 1, 6 is the part of the coaxial cord including the connector of the test object, and Rw in 6 is the conductor resistance of the coaxial cord. a#)
, 几X is the connection resistance of the two soldered parts 7 and 8 in Figure 2. It is expressed. The tester 1 includes a battery power supply 11° and a resistor 12 for taking out the output. DC blocking capacitor 1
3° AC amplifier 14. It is composed of a rectifier circuit 159 and an indicator 16. A joint connection between a plug and an outlet is used to connect the coaxial cord and the tester. A voltage is applied to the coaxial cord 6 by the battery power supply 11, and a stain current value is set by the resistor 12 for varying the measurement current. Next, mechanical vibration is applied to the conductor connections 7 and 8, and if a connection failure occurs, the connection resistance Rx changes. This fluctuation causes the voltage across the measuring current variable resistor 12 to fluctuate, which is converted into an alternating current signal. This AC signal is applied to an AC intensifier 14 through a DC blocking capacitor 13. The AC amplifier 14 amplifies the AC signal until it can drive the display 16. The rectifier circuit 15 has a function of converting an alternating current signal into a direct current signal in order to drive the display 16.

As explained above, according to the present invention, it is possible to test electrical connections reliably, easily, and in a short time.
Can be done.

[Brief explanation of drawings]

The drawings all relate to embodiments of the present invention, and Figure 1 is a cross-sectional view of the end of a coaxial cord to explain the test location of the test object, and Figure 2 is a diagram illustrating the state of connection between the coaxial cord and the tester. Figure 3 is an electrical circuit diagram when the coaxial cord and tester are all connected. 1... Tester, 6. Old... Coaxial cord, 7, 8
...Connection under test, 11...Battery power supply, 12...Resistance for variable measurement current and output extraction, 1
3...DC blocking capacitor, 14...
・AC amplifier, 15・old...- rectifier circuit, 16...group・
display.

Claims (1)

[Claims] A closed circuit is formed by the DC power supply, the connection under test between the conductors, and the resistor for variable measurement current and output extraction. The present invention is characterized in that, while giving the output voltage, a smeared alternating current fluctuation voltage is extracted from the output extraction resistor, and the direct voltage (Af) obtained by amplifying and rectifying this alternating current fluctuation voltage is displayed on a display. Electrical connection test method.