CN201689146U - Polarity conduction tester of multi-core power line - Google Patents

Abstract

The utility model discloses a polarity conduction tester of a multi-core power line, which comprises an input unit, a power circuit, a display circuit, a conduction diagnosis circuit, a pushing circuit and an output circuit, wherein the input unit is electrically connected with the power circuit; the power supply circuit is respectively and electrically connected with the display circuit and the access ends of the conduction diagnosis circuit and the pushing circuit; the output end of the conduction diagnosis circuit is electrically connected with the access end of the pushing circuit; the output end of the pushing circuit is electrically connected with the output circuit; the output circuit comprises a buzzer, an alarm and an LED indicating lamp corresponding to a core wire of a detected product, wherein when the detected product is qualified, the buzzer buzzes, otherwise, the alarm gives an alarm, and meanwhile, the corresponding LED indicating lamp is not lighted to indicate the position of a defective product. Therefore, by combining the semiconductor technology with the industrial automation technology, the product can test the polarity and the conduction of all two-core, three-core and four-core power lines at one time, and the test efficiency is greatly improved.

Description

Polarity continuity tester for multi-core power cords

technical field

The utility model relates to the technology in the field of power cord testing equipment, in particular to a polarity continuity tester for multi-core power cords.

Background technique

The polarity continuity tester for multi-core double-ended power cord is a professional testing instrument, which is used in the wire manufacturing industry and related product inspection industries. It has the functions of testing the continuity and polarity of wires, plugs, and sockets.

The current polarity continuity tester on the market mainly detects the polarity and continuity of two-core and three-core double-ended power cords. It cannot test many foreign wire specifications, such as all four-core wires and some special two-core wires. Core, three-core wire. Because there is no test instrument of this kind of product on the market, many manufacturers can only make a variety of simple instruments based on the structure of a single wire. Although the detection function can be realized, the performance is extremely unstable and the efficiency is too low. Among them, the four-core power cord must be used The three-core instrument was tested twice, but failed to achieve the best use effect and performance.

In view of this, it is very necessary to develop a polarity continuity tester that can test all types of two-core, three-core, and four-core power cords.

Utility model content

The purpose of this utility model is to provide a polarity conduction tester for multi-core power cords, which overcomes all the above difficulties and can test the polarity and continuity of all types of two-core, three-core, and four-core power cords, and the operation Convenient and highly efficient.

In order to achieve the above object, the utility model adopts the following technical solutions:

A polarity conduction tester for a multi-core power cord, including an input unit, a power supply circuit, a display circuit, a conduction diagnosis circuit, a push circuit and an output circuit. The input unit includes a test mold for connecting a product to be tested. The input unit is electrically connected to the power supply circuit; the power supply circuit is electrically connected to the display circuit, the conduction diagnosis circuit, and the access end of the push circuit; the display circuit includes a plurality of LEDs for displaying the status and performance of the product under test indicator light; the conduction diagnostic circuit is used to diagnose whether the product under test is qualified, and its output terminal is electrically connected to the access end of the push circuit; the push circuit includes a plurality of resistors and photocouplers, when the product under test is connected When the aforementioned input unit forms a loop with the primary measuring resistance and diode voltage division of the photocoupler, the secondary measuring contact of the optocoupler is pushed to act, thereby connecting the subsequent circuit. connection; the output circuit includes a buzzer, an alarm and an LED indicator corresponding to the core wire of the product under test. When the product under test is qualified, the buzzer will sound, otherwise the alarm will sound an alarm, and The corresponding LED indicator light is off and indicates the location of the defective product.

As a preferred solution, it further includes a verification unit, the verification unit is electrically connected to the power circuit, the verification unit includes a plurality of good and bad sample preparation lines, and such sample preparation lines are regularly connected to the input unit , to verify that the tester is working properly.

Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, through the combination of semiconductor technology and industrial automation technology, the product has the following advantages:

1. It can test the polarity and continuity of all four-core power cords at one time, while traditional instruments need to test twice when testing four-core power cords, and the test efficiency is more than doubled.

2. The operation is simple. To change the specifications, only the corresponding test mold needs to be replaced, and the replacement can be completed in one minute, which further improves the test efficiency and can fully cooperate with the assembly line operation.

3. It can test all special wires abroad, especially some special wires that are difficult to test with existing instruments of American and European standards, such as: SF-21P+51N, SF-153+51N, SF-152+523S, SF -76+77, SF-132+82, SF-09+82.83, SF-10+82.83, SF-10+87, SF-151+SF-150, etc., greatly improving the test range and helping to save costs.

Description of drawings

Fig. 1 is the working principle diagram of the embodiment of the utility model.

Explanation of the accompanying drawings:

10. Input unit 20. Power circuit

30. Display circuit 40. Calibration unit

50. Conduction diagnosis circuit 60. Push circuit

70. Output circuit 80. The product under test

Detailed ways:

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Please refer to shown in Fig. 1, it has shown the specific structure of the preferred embodiment of the present utility model, a kind of polarity continuity tester of multi-core power cord, comprises input unit 10, power supply circuit 20, display circuit 30, Check unit 40, conduction diagnosis circuit 50, push circuit 60 and output circuit 70, wherein:

The input unit 10 is an access part of the product under test 80 , which includes a test mold for connecting the product under test 80 , and the input unit 10 is electrically connected with the power circuit 20 .

The power supply circuit 20 can use a 24V/DC/5A switching power supply, but it is not limited thereto. The power supply circuit 20 has a stable output voltage, can effectively ensure the normal operation of the electronic components in the tester, and has functions such as short circuit protection.

The display circuit 30 includes a plurality of LED indicator lights for displaying the status and performance of the tested product 80 , and the display circuit 30 is electrically connected to the aforementioned power supply circuit 20 .

The verification unit 40 is electrically connected to the power supply circuit 20. The verification unit 40 includes a plurality of good and defective sample preparation lines, and such sample preparation lines are regularly connected to the input unit 10 to verify whether the tester is normal work.

The conduction diagnosis circuit 50 is used for diagnosing whether the tested product 80 is qualified. The input terminal is electrically connected, and when the push circuit 60 forms a loop, its secondary testing contacts are connected, and the series-parallel circuit composed of these contacts and related relays can effectively diagnose whether the tested product 80 is qualified.

The input end of the driving circuit 60 is electrically connected to the aforementioned power supply circuit 20 , and its output end is electrically connected to the input end of the aforementioned output circuit 70 . The push circuit 60 includes a plurality of resistors and photocouplers. When the product 80 to be tested is connected to the aforementioned input unit 10, after forming a loop with the primary resistance of the photocoupler and the diode voltage divider, the secondary measurement of the photocoupler is pushed. The contacts act to connect the subsequent circuit. The driving circuit 60 has fast running speed and strong anti-interference.

The output circuit 70 includes a buzzer, an alarm and an LED indicator corresponding to the core wire of the tested product 80. When the tested product 80 is qualified, the buzzer will sound, otherwise the alarm will sound an alarm. At the same time, the corresponding LED indicator light is off to indicate the location of the defective product.

The utility model combines the semiconductor technology with the industrial automation technology, and the whole circuit adopts 24V/DC low-voltage power supply, which can effectively guarantee the safety of testers and tested products 80 .

Now take the four-core power cord as an example to describe the working principle and operation method of this instrument: first, use the calibration unit 40 to test to ensure that the instrument works normally; In the circuit 30, the four-core LED light is on, and then the four-core power cord to be tested is inserted into the test mold of the input unit 10. After the automatic test of the instrument is performed instantaneously, if the buzzer in the output circuit 70 emits a "beep..." buzzer sound, it means that the four core wires of this four-core power cord are all qualified, and at this time the corresponding four LED indicators are all lit, on the contrary, if some or all of the four LED indicators are off, and there are continuous abnormal alarms sound, it means that the four-core power cord is bad, and which LED indicator light is not on, it means that the core wire corresponding to the off-light LED indicator light is bad, and the tester can immediately find out the abnormal point of the defective product, and Do relevant processing to prevent potential safety hazards and economic losses from flowing into the client; finally unplug the test wire and the test is completed.

Similarly, when testing a two-core power cord or a three-core power cord, you only need to adjust the specification selection switch to the corresponding gear, and then replace the test mold of the input unit 10 with the test mold corresponding to the product 80 under test. , other processes are basically the same as the test of the four-core power cord, and will not be repeated here.

It should be pointed out that there is a clear difference between the abnormal alarm sound issued by the instrument when the tested product 80 is defective and the buzzer sound issued when the tested product 80 is good, and will not cause trouble to the testers.

The key point of the design of this utility model is that by combining semiconductor technology with industrial automation technology, this product can not only test the polarity and conduction of all four-core power cords at one time, greatly improve the test efficiency, but also test all foreign power cords. The special wire rod greatly improves the test range and helps to save costs; in addition, this product is easy to operate, and the replacement of the specification only needs to replace the corresponding test mold, and the replacement can be completed in one minute, which further improves the test efficiency and can fully cooperate with the assembly line homework, which is conducive to marketing.

The above are only preferred embodiments of the present utility model, and do not limit the technical scope of the present utility model in any way, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model, All still belong to within the scope of the technical solution of the utility model.

Claims (2)

1. A polarity continuity tester for a multi-core power cord, characterized in that it includes an input unit, a power supply circuit, a display circuit, a conduction diagnosis circuit, a push circuit and an output circuit, and the input unit includes a The test mold of the product, the input unit is electrically connected to the power circuit; the power circuit is electrically connected to the display circuit, the conduction diagnosis circuit, and the access end of the push circuit; the display circuit includes a plurality of The state and performance of the LED indicator light; the conduction diagnostic circuit is used to diagnose whether the product under test is qualified, and its output terminal is electrically connected to the access terminal of the push circuit; the push circuit includes a plurality of resistors and photocouplers, When the product under test is connected to the aforementioned input unit, after forming a loop with the primary resistance of the optocoupler and the diode voltage divider, the secondary contact of the optocoupler is pushed to act, thereby connecting the subsequent circuit, and the output of the push circuit The terminal is electrically connected to the aforementioned output circuit; the output circuit includes a buzzer, an alarm and an LED indicator corresponding to the core wire of the product under test. When the product under test is qualified, the buzzer will sound, otherwise it will alarm The device sends out an alarm sound, and at the same time the corresponding LED indicator light is off to indicate the location of the defective product. 2. The polarity continuity tester of multi-core power cord according to claim 1, characterized in that: it further comprises a verification unit, the verification unit is electrically connected with the power circuit, and the verification unit includes a plurality of good products And defective sample preparation lines, connect such sample preparation lines to the input unit regularly to verify whether the tester is working normally.