CN210376643U

CN210376643U - Relay inspection machine

Info

Publication number: CN210376643U
Application number: CN201920974799.2U
Authority: CN
Inventors: 权成文
Original assignee: Weihai Tongda Electronic Precision Machinery Co Ltd
Current assignee: Weihai Tongda Electronic Precision Machinery Co Ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-04-21
Anticipated expiration: 2029-06-26

Abstract

The utility model provides a relay inspection machine, it has solved the lower technical problem of current relay inspection machine detection efficiency and degree of automation, and it is equipped with the box, and the box is inside including detecting mainboard and power strip, detects the mainboard and includes the control unit, relay drive unit, relay module, voltage comparator, sets up the socket on the box backplate, and the socket is connected with voltage comparator and relay module electricity respectively, and the power strip includes voltage gating circuit, control circuit, communication circuit, the utility model discloses can extensively be used for automobile inspection technical field.

Description

Relay inspection machine

Technical Field

The utility model belongs to the technical field of the automotive inspection technique and specifically relates to a relay inspection machine is related to.

Background

With the increasing development of automobile technology, the wire harness is also receiving more and more attention as an important safety part of the automobile, and plays an important role in protecting contacts and ensuring normal operation of electrical appliances in a plurality of complex and high-power electrical appliance relays of the automobile.

The prior art adopts relay detection device to detect the relay, but it can not detect many relays simultaneously, will detect simultaneously and only can adopt many check out test set, therefore cause the not high problem of detection efficiency, and current relay check out test set is two pins of simple detection relay coil, can not carry out comprehensive inspection to each pin of relay, and degree of automation is lower.

Disclosure of Invention

The utility model discloses be exactly to the lower technical problem of current relay inspection machine detection efficiency and degree of automation, provide a higher gas tightness inspection machine of detection efficiency and degree of automation.

Therefore, the utility model discloses be equipped with the box, the box is inside including detecting mainboard and power strip, detects the mainboard and includes the control unit, relay drive unit, relay module, voltage comparator, sets up the socket on the box backplate, and the socket is connected with voltage comparator and relay module electricity respectively, and the power strip includes voltage gating circuit, control circuit, communication circuit.

Preferably, the detection mainboard is provided with a plurality of detection mainboards, each detection mainboard comprises an internal communication unit, and communication among the detection mainboards is realized through the internal communication units.

Preferably, the detection main board comprises an external communication unit, and the external communication unit adopts RS232 to realize communication between the detection main board and the upper computer.

Preferably, the control unit and the control circuit both adopt an STM32 series microcontroller as a main control chip.

Preferably, the voltage gating circuit includes a relay circuit and a voltage selection circuit.

Preferably, the power panel includes a driving circuit electrically connected to the control circuit and the relay circuit, respectively.

Preferably, a voltmeter is arranged on the front plate of the box body and electrically connected with the voltage gating circuit.

Preferably, a display screen is arranged on the front plate of the box body.

The utility model detects the short circuit and the open circuit between the pins and whether the coil acts or not by switching on and off the relay coil, judges the quality of the relay, and the relay checking machine can comprehensively check the pins of the relay instead of simply detecting only two pins of the coil; through setting up voltage gating circuit, select the supply voltage of relay to adapt to different supply voltage's relay, work efficiency is higher, the effectual productivity that has improved.

Drawings

FIG. 1 is a schematic structural view of the box body of the present invention;

FIG. 2 is a schematic structural diagram of a back plate of the case;

FIG. 3 is a schematic view of an interface of the receptacle;

FIG. 4 is a schematic block diagram of the detection motherboard and power board.

The symbols in the drawings illustrate that:

1. a box body; 2. a box body back plate; 3. a socket; 4. a front plate of the box body; 5. a voltmeter; 6. a display screen.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the drawings.

As shown in fig. 1, fig. 2 and fig. 3, the utility model is provided with a box body 1, the box body 1 includes a plurality of detection mainboards and a power supply board, the detection mainboards are arranged in the embodiment, 6 detection mainboards are arranged in the embodiment, each detection mainboard detects 6 relays, and the detection of 36 relays can be realized simultaneously; set up 6 sockets 3 on

box backplate

2, 6 sockets 3 are connected with 6 detection mainboard electricity respectively, and socket 3 detects each pin of relay through test fixture connection, detects each pin of relay.

As shown in fig. 4, the detection main board includes a control unit, an external communication unit, an internal communication unit, a relay driving unit, a relay module, and a voltage comparator, the control unit is electrically connected to the internal communication unit, the external communication unit, the relay driving unit, and the voltage comparator, the relay driving unit is electrically connected to the relay module, the control unit uses an STM32 series microcontroller as a main control chip, the control unit drives the relay module through the relay driving unit, the relay driving unit uses an ULN2803 octuple darlington tube, the relay module is electrically connected to the socket 3, and each path of test voltage is provided for the relay to be detected; the voltage comparator is electrically connected with the socket 3, adopts an LM2903D low-power-consumption voltage dual comparator and is used for receiving the feedback voltage of the relay to be detected, comparing the feedback voltage with the reference voltage and then transmitting the voltage comparison information to the control unit, the control unit transmits the voltage comparison information to the upper computer through the external communication unit, and the external communication unit adopts RS232 serial port communication; and the internal communication module adopts RS485 to realize communication among the control units in the detection mainboards.

The power panel comprises a voltage gating circuit, a control circuit, a communication circuit and a driving circuit, wherein the control circuit is respectively electrically connected with the voltage gating circuit, the communication circuit and the driving circuit, the communication circuit adopts RS232 serial port communication to realize communication between the control circuit and an upper computer, the upper computer transmits a voltage selection signal to the control circuit through the communication circuit, and the control circuit adopts an STM32 series microcontroller as a main control chip; the driving circuit is electrically connected with the voltage gating circuit, the voltage gating circuit comprises a relay circuit and a voltage selection circuit, the control circuit drives the relay circuit through the driving circuit, the driving circuit adopts ULN2803 eight-path Darlington tubes, the relay circuit outputs 24V voltage, the control circuit controls the voltage selection circuit to select different resistors through 74HC4051 so as to output different voltages, in the embodiment, 8V, 10V and 12V voltages are respectively selected and output, because the power supply voltages of the relays to be detected are different, the control circuit selects the voltage value to be output according to the voltage selection signal transmitted by the upper computer, the output voltage is connected to the relay module of the detection main board and supplies power to the relays to be detected, the voltage meter 5 is arranged on the front board 4 of the box body, the voltage meter 5 is electrically connected with the voltage gating circuit, and the voltage value is displayed through the voltage meter.

Preferably, a display screen 6 is arranged on the front plate 4 of the box body, and the actually measured voltage value is displayed through the display screen 6.

During the test, to wait to detect each relay and be connected to socket 3 through test fixture, the host computer passes through control circuit drive voltage gating circuit according to the supply voltage who waits to detect the relay and selects corresponding voltage value, define P point in socket 3 and be relay coil positive pole, M point is relay coil's negative pole, C0 point is the common terminal of relay contact, C1 is the normally closed contact of relay, the normally open contact of C2 position relay, if two measuring points all have voltage at the same moment, it takes place to explain there is the short circuit phenomenon, concrete test step divides following several steps:

(1) the positive electrode of the P point coil of the relay coil is electrified, and whether the short circuit phenomenon exists at the common end of C0, the normally closed point of C1, the normally open point of C2 and the positive electrode of the P point coil is detected;

(2) the negative electrode of the M point coil of the relay coil is electrified, and whether the C1 normally closed point, the C2 normally open point and the negative electrode of the M point coil have a short circuit phenomenon is detected;

(3) a normally closed contact of the relay C1 is electrified to detect whether a short circuit phenomenon exists at a P point, an M point and a C2 normally open contact;

(4) a normally open contact of the relay C2 is electrified to detect whether a short circuit phenomenon exists at a P point, an M point and a C1 normally closed contact;

(5) the P point and the M point of the relay coil are electrified to pull in the coil, the C1 normally closed contact and the C2 normally open contact are electrified to detect whether the normally closed contact is disconnected or not, and whether the normally open contact is closed or not.

However, the above description is only an embodiment of the present invention, and the scope of the present invention should not be limited thereto, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims

1. The utility model provides a relay inspection machine, its is equipped with the box, its characterized in that, box is inside including detecting mainboard and power strip, it includes control unit, relay drive unit, relay module, voltage comparator to detect the mainboard, set up the socket on the box backplate, the socket respectively with voltage comparator with the relay module electricity is connected, the power strip includes voltage gating circuit, control circuit, communication circuit.

2. The relay inspection machine according to claim 1, wherein the plurality of inspection main boards are provided, the inspection main boards include an internal communication unit, and communication between the inspection main boards is realized through the internal communication unit.

3. The relay inspection machine according to claim 1, wherein the detection main board comprises an external communication unit, and the external communication unit realizes communication between the detection main board and the upper computer by using RS 232.

4. The relay inspection machine according to claim 1, wherein said control unit and said control circuit each employ an STM32 series microcontroller as a main control chip.

5. The relay inspection machine of claim 1, wherein the voltage gating circuit includes a relay circuit and a voltage selection circuit.

6. The relay inspection machine of claim 1, wherein the power strip includes a drive circuit electrically connected to the control circuit and the relay circuit, respectively.

7. The relay inspection machine of claim 1, wherein a voltmeter is disposed on the front plate of the box body, and the voltmeter is electrically connected to the voltage gating circuit.

8. The relay inspection machine of claim 1, wherein a display screen is provided on the front plate of the box.