CN210119553U - Detection apparatus for whether short circuit exists between each pin of DB plug - Google Patents

Abstract

The utility model discloses a detection device for whether the pins of a DB plug are short-circuited, and relates to the field of circuit detection. The utility model comprises a casing, a wire slot, a control main board and a power supply module. The main board and the power module are fixed with screws. The wiring slot is stuck by the casing. At the same time, the wiring slot can be connected with an adapter to convert the female connector into a male connector. The control board can be divided into three parts, namely External connection part, display part, controller part, the external connection part is a 9-pin pin header, the display part is a switch circuit composed of 9 light-emitting diodes and 9 triodes, and the controller part is mainly composed of ATMEGA168 microcontroller as the core. The control board is composed of the short-circuit detection device of each pin of the DB plug, which solves the problem of time-consuming and labor-intensive detection of short-circuit or open-circuit of the traditional multimeter, and improves the work efficiency of workers.

Description

A detection device for whether the pins of the DB plug are short-circuited

Technical field:

The utility model relates to the field of circuit detection, and is also suitable for the production of small and medium-sized automation equipment.

Background technique:

With the market demand for automation equipment, control signal lines with connectors, DB plugs and aviation plugs are widely used in automation equipment. However, most of the domestic production of this type of signal line adopts the method of manual welding of plugs and wires. Although this method reduces the cost, it also increases the scrap rate. Most products are scrapped due to line failure or short-circuit.

At present, the detection of line failure or short circuit is mainly completed by a multimeter, which is extremely inefficient, and the efficiency decreases sharply with the increase of the number of plug pins.

Utility model content:

The utility model improves the detection method on the basis of detection by the multimeter, replaces the buzzer of the multimeter with light-emitting diodes, increases the number of detection channels to 9 at the same time, and can detect whether the 9 wires are connected at the same time. Whether the 9 wires are short-circuited.

In order to solve the problems existing in the background technology, the technical scheme adopted by the present invention is as follows: it includes a casing, a wire slot, a control main board, and a power supply module; the wire slot is embedded in the casing; For fixing, the plug-in slot is stuck by the shell, and at the same time, the plug-in groove can be connected with an external adapter to convert the female connector into a male connector. The control board can be divided into three parts, namely the external connection part, the display part, the The controller part, the external connection part is a 9-pin pin header, the display part is a switch circuit composed of 9 light-emitting diodes and 9 triodes, the controller part is a control circuit with a single-chip microcomputer as the core, and the light-emitting part of the display part is working. The diode will cycle from left to right at a speed of 0.5 seconds. If there is a short circuit between the detected pin and other pins, the detected pin and the LED corresponding to the shorted pin will be lit. .

Description of drawings:

Fig. 1 is the overall structure diagram of the short circuit test device;

Figure 2 is the overall structure diagram of the DB plug adapter;

Figure 3 is a schematic diagram of the control board circuit.

Description of reference numerals: 1-shell, 2-wire slot, 3-control board, 4-power module, 5-male-female adapter, 6-switch button, 7-reset button, 8-display module, 9-GND Input port, 10-fixing screw, 11-DB plug interface, 12-transfer circuit module, 13-9 pin plug, 14-connector top view.

Detailed ways:

The utility model will be described in detail in conjunction with the specific embodiments and the accompanying drawings:

External hardware part: Insert the wire slot 2 inside the shell 1, and insert the male-female adapter 5 into the wire slot 2 for the detection of the 9-pin female plug, and fix the control board 3 and the power supply by the fixing screw 10. Module 4, the power module 4 selects a 5V voltage source module, and shares the ground with the controller motherboard through the GND input port.

Internal hardware part (that is, the control board circuit part): the external connection part is mainly connected with the wire slot 2 in Figure 1 for the detection of wires. The voltage is 5V; the display part is 9 identical circuits with NPN transistors as the core, taking the first one on the left as an example, the No. 1 pin of pin9 is connected to the upper end of R1, the lower end of R1 is connected to the upper end of D1, the The lower end is connected to the +5V power supply and the collector of the NPN transistor Q1 through R10, the base of Q1 is connected to the 30th pin of the microcontroller part of the controller through the resistor R11, and R11 and Q1 are connected to GND through R20; the controller part U1 selected For the ATMEGA168 single-chip microcomputer of ATMEL company, pins 4, 6 and 18 of U1 are connected to +5V power supply, pins 3, 5 and 21 of U1 are connected to GND, and pin 7 of U1 is connected to pin 2 of Y1. The pin is connected to C1, the No. 8 pin of U1 is connected to the No. 1 pin of Y1 and C2, C1 and C2 are connected to GND at the same time, the 30~31, 1~2, 9~11, 23 pins of U1 are respectively connected with R11~R19 are connected, the upper end of R29 is connected to the +5V power supply, the 29th pin of U1 is connected to the lower end of R29 and the upper end of S1, the lower end of S1 is connected to GND, and S1 corresponds to the reset button 7 in Figure 1.

Working status: When the tested connector is directly inserted into the slot 2 or connected through the male-female adapter or through the DB adapter, the display module 8 will be turned on in sequence from left to right at intervals of 0.5 seconds. Only one light-emitting diode is turned on at a time. If n light-emitting diodes are off, the wires corresponding to the n light-emitting diodes have an open circuit. If m light-emitting diodes are turned on at the same time, the wires corresponding to the m light-emitting diodes are short-circuited. catch.

The beneficial effects of the utility model are as follows: the utility model transforms the multimeter, and performs on-off and short-circuit measurement on the signal lines of the DB plug type with the flat cable as the connection method, which greatly saves the time of ordinary workers using the multimeter for detection, and improves the worker's experience. work efficiency. According to the test, the time taken by the utility model to measure is 50% of that of the traditional method.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the within the scope of protection of the present invention.

Claims (4)

1. The utility model provides a detection apparatus whether short circuit between each pin of DB plug which characterized in that: it includes shell (1), plug wire groove (2), control mainboard (3), power module (4) imbed plug wire groove (2) in shell (1), fix control mainboard (3) and power module (4) with the screw simultaneously, plug wire groove (2) blocked by shell (1), plug wire groove (2) can external adapter make public female adapter (5) turn into the male joint simultaneously, final measuring result will be presented by display module (8), the control mainboard can be divided into 3 parts, external connection part, display part, controller part, external connection part divide into pin9, pin9 is that the pin bank of a 9 pins links to each other with plug wire groove (2), display part is corresponding with display module (8), constitute by 9 emitting diode and the switch circuit of 9 triodes for the core, control switch circuit's switching on through controller U1, the controller part is a control circuit which takes a singlechip as a core.

2. The device for detecting whether there is a short circuit between the pins of the DB plug according to claim 1, wherein if the detected pin is normal, the leds of the module (8) are cyclically lit from left to right at a speed of 0.5 second, if the detected pin is open, the corresponding led will not be lit during the cyclic process, and if there is a short circuit between the detected pin and other pins, the detected pin and the led corresponding to the shorted pin will be lit.

3. The device for detecting whether there is a short circuit between the pins of the DB plug according to claim 1, wherein the switch circuit controlling the display portion of the main board uses 3 resistors for limiting the current.

4. The device for detecting whether short circuit occurs between pins of a DB plug according to claim 1, wherein an ATMEGA168 single chip microcomputer of ATMEL company is selected as a controller U1 of the control circuit.

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