CN217639412U

CN217639412U - PCB detection device of analog current

Info

Publication number: CN217639412U
Application number: CN202221397934.XU
Authority: CN
Inventors: 陈宇会; 曾家瑞; 杨德志; 李杰宏
Original assignee: Shanghai Mealer Welding Equipment Co ltd
Current assignee: Shanghai Mealer Welding Equipment Co ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-10-21
Anticipated expiration: 2032-05-30

Abstract

The application relates to a PCB detection device for simulating current, which belongs to the field of detection devices and comprises a positioning plate, a base, a bracket, a switch part, a pressing piece, a simulation mutual inductor module and an adjusting panel; the positioning plate is fixed on the base and used for positioning and placing the PCB to be detected; the support is vertically fixed above one side of the base, and the pressing piece is connected to the support in a sliding mode; the switch component is connected between the bracket and the pressing piece, and the pressing piece is linked to slide towards the direction close to or far away from the positioning plate; a detection board is arranged in the base, and a plurality of detection circuits for electrically connecting the PCB are arranged on the detection board; the analog mutual inductor module is arranged on the detection board and used for outputting constant current to the PCB; the adjusting panel is arranged on the bracket and used for outputting given voltage to the PCB. The PCB detection method and the PCB detection device solve the defects of low efficiency and insecurity in the PCB detection process.

Description

PCB detection device of analog current

Technical Field

The application relates to the field of detection devices, in particular to a PCB detection device.

Background

At present, along with the development of science and technology, the demand of industry, PCB detection device has been very common, but some are the area load test, carry out the test of current-voltage through terminating a load box at the welding machine output and judge PCB's quality promptly, need frequently to change over the wire during this kind of test, and the welding machine output is big voltage of heavy current, and the test effect is incomplete yet.

In view of the above-mentioned related art, the inventors consider that there is a drawback of inefficiency and insecurity in the PCB inspection process.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of low PCB detection efficiency and insecurity, the application provides a PCB detection device for simulating current.

The application provides a PCB detection device of analog current adopts following technical scheme:

the application relates to a PCB detection device for simulating current, which belongs to the field of detection devices and comprises a base, a positioning plate, a bracket, a switch component, a pressing component, a detection plate, a simulation mutual inductor module and an adjusting panel; the positioning plate is fixed on the base and used for positioning and placing the PCB to be detected; a detection plate is arranged in the base, and a plurality of detection circuits for electrically connecting the positioning plate are arranged on the detection plate; the support is vertically fixed above one side of the base, and the pressing piece is connected to the support in a sliding mode; the switch component is connected between the bracket and the pressing piece, and the pressing piece is linked to slide towards the direction close to or far away from the positioning plate; a detection board is arranged in the base, and a plurality of detection circuits for electrically connecting the PCB are arranged on the detection board; the analog mutual inductor module is arranged on the detection board and used for outputting constant current to the PCB; the adjusting panel is arranged on the bracket and used for outputting given voltage to the PCB.

By adopting the technical scheme, when detection is needed, the switch component is pushed, the linkage pressing piece moves towards the direction close to the positioning plate, the PCB is pressed on the positioning plate, the PCB is electrically connected with the conductive terminals on the detection plate, the detection plate and the PCB circuit are conducted, and after the circuit is conducted, constant current and given voltage output by the analog mutual inductor module are input to the PCB to adjust the size of final output voltage control pulse. This device replaces the heavy current output that the original circuit exists with the weak current of simulation mutual-inductor, observes the pulse waveform of narrowing on display device, reaches waveform feedback circuit's purpose, has greatly improved the efficiency that PCB detected, and what this process passed through is weak current, safer more power saving.

Preferably, the analog transformer module comprises a voltage stabilizing submodule and a constant current source submodule, wherein the voltage stabilizing submodule is used for inputting a DC +15V voltage accessed by external equipment and outputting a stable +5V voltage; the constant current source submodule is used for acquiring +5V voltage and outputting constant current for simulating a mutual inductor.

By adopting the technical scheme, the circuit outputs constant low-current signals through the analog transformer module. The current in the original circuit is a large current of 200A, the circuit in the device passes a weak current of 100mA, and the self-made analog current and the original circuit current are equivalently replaced, so that the safety and the reliability of detection are improved; the current of the analog transformer replaces the current of the transformer, so that the transformer is replaced by the module, and the consumption of a circuit is reduced.

Preferably, the adjusting panel is provided with an encoder for outputting different given voltages and an adjusting switch for adjusting the encoder to output the given voltages.

By adopting the technical scheme, the voltages of the mode switch corresponding to different modes are adjusted, so that the detection of the performance of the PCB is more comprehensive; the PI adjusting module inputs the given voltage and the circuit output voltage to the PCB, carries out error adjustment on the difference value of the given voltage and the circuit output voltage, then outputs the voltage to control the pulse size, the pulse waveform can be displayed on an oscilloscope, different given voltages are output by adjusting the encoder, the output circuit voltage is different, the finally displayed pulse waveform can also change, the PCB quality can be judged by observing the change of the pulse waveform, and the purpose of the waveform feedback circuit is achieved.

Preferably, the pressing part comprises an upper panel, a lower panel, an upper stand column, a lower stand column and a guide arm, the upper stand column is fixed between the upper panel and the lower panel and is fixed on the lower surface of the lower panel, the support is provided with a sleeve connected with the guide arm in a sliding manner, the lower end of the guide arm is fixed in the middle of the upper panel, and the upper end of the guide arm is connected with the lower end of the switch component.

By adopting the technical scheme, when the pressing piece moves towards the direction close to or away from the positioning plate, the pressing piece is moved through the guide arm connected with the switch component, and the guide arm rises or falls to drive the upper panel and the lower panel to rise or fall; when the guide arm moves downwards, the upper panel and the lower panel are linked to move downwards together, and after the guide arm moves for a certain distance, the lower upright post fixed on the lower panel touches the PCB, so that the PCB is pressed on the positioning plate; set up a plurality of upper posts between upper and lower panel, upper post can be when compressing tightly the piece and push down for compressing tightly the piece and provide the pressure of one downwards to make PCB and locating plate laminate more completely.

Preferably, a guide rod is vertically fixed on the support, and the pressing piece is sleeved on the guide rod in a sliding manner.

Through adopting above-mentioned technical scheme, under the guide effect of guide bar, make to compress tightly the piece and more steadily slide from top to bottom.

Preferably, the upper panel and the lower panel of the pressing piece are both provided with sliding sleeves sleeved on the guide rods.

Through adopting above-mentioned technical scheme, set up the ascending and descending that the sliding sleeve is convenient for compress tightly the piece on the panel, promoted detection efficiency.

Preferably, the detection plate is provided with a conductive terminal for electrically connecting the PCB to be detected, and the conductive terminal penetrates out of the positioning plate.

By adopting the technical scheme, when the detection is needed, the PCB to be detected is placed at the corresponding position on the positioning plate, and when the PCB is pressed downwards, the conductive terminals on the detection plate are electrically connected with the PCB to realize the conduction of the PCB and the detection circuit.

Preferably, the switch component comprises a driving rod and a driven rod, the upper end of the driving rod is hinged to the support, the lower end of the driving rod is hinged to the upper end of the driven rod, and the lower end of the driven rod is hinged to the pressing piece.

By adopting the technical scheme, the driving rod is pulled outwards to drive the driving rod and the driven rod to move outwards, the driving rod and the driven rod form a certain angle, the driven rod is linked with the pressing piece to move towards the direction away from the positioning plate, and the pressing piece leaves the positioning plate; otherwise, the driving rod is pushed inwards, so that the driving rod and the driven rod are in the same line, and the driven rod is linked with the pressing piece to move towards the direction close to the positioning plate.

Preferably, the outer surface of the base is provided with a voltage display and a voltage switch.

Through adopting above-mentioned technical scheme, voltage display and voltage switch set up the surface at the base, are convenient for detect operation and observe test voltage.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the detection device replaces the current of the mutual inductor with the constant current of the analog mutual inductor, then converts the constant current into the analog voltage through the resistor, inputs the analog voltage and the given voltage to the PCB for PI regulation, and finally outputs the voltage control pulse waveform, and the size of the voltage control pulse waveform is displayed on the oscilloscope, so that the purpose of the waveform feedback circuit is achieved, and the detection efficiency is improved.

2. The current 100mA output by the analog transformer module replaces the transformer current 200A existing in the original circuit, so that the detection process is safer.

Drawings

Fig. 1 is a schematic view of an overall structure of a PCB detection apparatus according to an embodiment of the present application.

Fig. 2 is a schematic circuit diagram of a board analog transformer module according to an embodiment of the present application.

Fig. 3 is a schematic circuit diagram of PI regulation according to an embodiment of the present application.

Description of the reference numerals: 1. a support; 11. an adjustment panel; an encoder 111; an adjustment switch 112; 12. a guide rod; 2. a switch member; 21. a drive rod; 22. a driven lever; 3. a compression member; 31. a guide arm; 32. an upper panel; 321. a sliding sleeve; 33. an upper upright post; 34. a lower panel; 35. a lower upright post; 4. positioning a plate; 5. a base; 51. detecting a plate; 511. a conductive terminal; 512. an analog transformer module; 5121. a voltage regulator module; 5122. a constant current source submodule; 52. displaying the voltage; 53. voltage switch

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a PCB detection device for simulating current. Referring to fig. 1, the detection device comprises a base 5, a positioning plate 4, a bracket 1, a switch component 2, a pressing member 3 and a detection plate 51, wherein the positioning plate 4 is fixed on the base 5 and used for positioning and placing a PCB to be detected; the detection board 51 is arranged in the base 5, and a plurality of detection circuits for electrically connecting the PCB are arranged on the detection board 51; the support 1 is vertically fixed above one side of the base 5, the pressing piece 3 is connected to the support 1 in a sliding manner, and the pressing piece 3 is arranged right above the positioning plate 4; the switch component 2 is connected between the bracket 1 and the pressing piece 3, and the pressing piece 3 is linked to slide towards or away from the positioning plate 4.

When detecting, the PCB that will wait to detect is placed on locating plate 4, promotes switch part 2, and switch part 2 linkage compresses tightly 3 and slides to the direction that is close to locating plate 4, makes PCB closely laminate on locating plate 4, realizes detecting that stable circuit switches on between version and the PCB, realizes detecting. After the detection is finished, the switch component 2 is pulled back, the switch component 2 is linked with the pressing piece 3 to slide towards the direction far away from the positioning plate 4, and the circuit is disconnected.

Referring to fig. 1, the pressing member 3 includes a guide arm 31, an upper panel 32, a lower panel 34, an upper pillar 33, and a lower pillar 35; the upper end of the guide arm 31 is connected with the switch component 2, and the lower end is fixed in the middle of the upper panel 32; the upper panel 32 and the lower panel 34 are two rectangular plates with the same size, the upper panel 32 and the lower panel 34 are right above the positioning plate 4, a plurality of upper upright posts 33 are uniformly fixed between the upper panel 32 and the lower panel 34, the lower upright posts 35 are longer than the upper upright posts 33, and the lower upright posts 35 are dispersedly and vertically fixed on the lower surface of the lower panel 34.

The switch component 2 is linked with the movement of the guide arm 31, thereby driving the upper panel 32 and the lower panel 34 to move towards the direction close to or away from the positioning plate 4, after moving for a distance towards the direction close to the positioning plate 4, the lower upright post 35 fixed on the lower surface of the lower panel 34 touches the PCB and presses downwards to make the PCB and the conductive terminal 511 tightly connected with the positioning plate 4, and the upper upright post 33 fixed between the upper panel 34 and the lower panel 34 gives a larger pressure to the panel when the lower upright post 35 presses the PCB by the downward movement of the upper panel 34 and the lower panel 34.

Referring to fig. 1, a guide rod 12 is vertically fixed on the bracket 1, sliding sleeves 321 are respectively arranged on the upper and lower panels 34, and the guide rod 12 is connected to the upper and lower panels 34 in a sliding manner through the sliding sleeves 321. The pressing piece 3 slides through the guide rod 12, and the lifting is more stable.

Referring to fig. 1, the switch part 2 includes a driving rod 21, a driven rod 22, and a handle, wherein the upper end of the driving rod 21 is hinged to the bracket 1, the lower end of the driving rod 21 is hinged to the upper end of the driven rod 22, the lower end of the driven rod 22 is hinged to the pressing member 3, and the handle is fixed to the driving rod 21 and located at the hinged position of the driving rod 21 and the driven rod 22.

When the switch component 2 is started, the handle is pushed inwards to enable the driving rod 21 and the driven rod 22 to be on the same straight line, the driven rod 22 drives the guide arm 31 to move downwards, the guide arm 31 drives the upper panel 34 and the lower panel 34 to move towards the direction close to the positioning plate 4, the PCB is pressed on the positioning plate 4, after detection is completed, the handle is pulled outwards to enable the driving rod 21 and the driven rod 22 to form a certain angle, the driven rod 22 drives the guide arm 31 to move upwards, and the guide arm 31 drives the upper panel 34 and the lower panel 34 to be away from the positioning plate 4.

The adjusting panel 11 is arranged on the bracket 1, and the adjusting panel 11 is provided with an encoder 111 for outputting different given voltages and a switch 112 for adjusting the output of the encoder to an unused voltage.

Referring to fig. 1, the detection board 51 includes conductive terminals 511 and an analog transformer module 512, the conductive terminals 511 penetrate out from above the positioning board 4 for electrically connecting the PCB, and the lower column 35 is disposed right above the conductive terminals 511; the analog transformer module 512 outputs a constant current for an analog transformer.

Referring to fig. 1 and 3, when the pressing member 3 presses the PCB on the positioning plate 4, the PCB is electrically connected to the detecting plate 51 through the conductive terminals 511 penetrating through the positioning plate 4, so as to realize circuit conduction between the detecting plate 51 and the PCB; after the circuit is conducted, the analog transformer module 512 on the detection board 51 is connected with the voltage of an external device, outputs constant analog transformer current to the PCB, converts the constant analog transformer current into analog voltage through a resistor, the given voltage on the adjustment panel 11 is also input to the PCB, and the PI adjustment module on the PCB performs error adjustment on the difference value of the constant analog transformer current and the given voltage, so that the analog voltage is the same as the given voltage, and finally outputs the voltage to control pulse waveform; the adjusting switch 112 controls the encoder 111 to output different given voltages, and then the final output voltage changes through the PI adjusting module, and the pulse waveform controlled by the voltage changes correspondingly, so that the quality of the PCB overheating protection performance can be judged.

Referring to fig. 2, the analog transformer module 512 includes a voltage stabilizing sub-module 5121 and a constant current source sub-module 5122, the voltage stabilizing sub-module 5121 includes a first resistor R1 and a voltage stabilizing chip LM7805, one end of the first resistor is connected to a voltage DC +15V input by an external device, the other end of the first resistor is used for connecting an input end of the voltage stabilizing chip LM7805, an output end of the voltage stabilizing chip LM7805 outputs a stable +5V voltage to the constant current source sub-module, and a ground end of the voltage stabilizing chip LM7805 is used for grounding; constant current source submodule 5122 includes first electric capacity C1, second electric capacity C2, voltage regulation chip LM317, second resistance R2 and third electric capacity C3, the node of first electric capacity C1 and second electric capacity C2 constitutes the input of +5V voltage, the other end ground connection of first electric capacity, the node of second electric capacity and voltage regulation chip LM317 input receives the +5V of input, the other end ground connection of second electric capacity, the one end of second resistance R2 is connected to voltage regulation chip LM 317's output, the other end of second resistance R2 is connected to voltage regulation chip LM 317's earthing terminal, the other end of third electric capacity C3's input and the output of circuit are constituted with the node of voltage regulation chip LM 317's earthing terminal to the other end of second resistance R2, the other end ground connection of third electric capacity C3's voltage.

After the circuit is conducted, the voltage stabilizing sub-module 5121 outputs stable voltage, the constant current source sub-module 5122 outputs stable current 100mA for simulating the transformer, the stable voltage and the stable current are input to the PCB, and the constant current 100mA output by the simulating transformer replaces the current of the transformer, so that the transformer is replaced, 200A large current existing in the original circuit is eliminated, and the equivalent test is safer and more reliable.

Referring to fig. 1, the outer surface of the base 5 is provided with a voltage display 52 and a voltage switch 53 for testing other voltages of the PCB.

The implementation principle of the embodiment of the application is as follows: when a PCB needs to be detected, the PCB is placed on the positioning plate 4, the handle is pushed to enable the driving rod 21 and the driven rod 22 to move to be on the same straight line, the driven rod 22 is linked with the guide arm 31 to slide downwards, the guide arm 31 drives the upper panel 34 and the lower panel 34 to slide towards the direction close to the positioning plate 4, finally the lower upright post 35 touches the PCB and presses the PCB on the positioning plate 4, at the moment, the PCB is electrically connected to the detection plate 51 through a conductive terminal 511 penetrating out of the positioning plate 4, so that a circuit between the PCB and the detection plate 51 is conducted, then the current of external equipment is connected to the analog transformer module 512 of the detection plate 51, the constant current 100mA for simulating the transformer is output to the PCB and converted into analog voltage through a resistor, the analog voltage and the given voltage output by the adjusting panel 11 are jointly input to the PI adjusting module on the PCB, the difference between the analog voltage and the given voltage is subjected to error adjustment, the analog voltage is the same as the given voltage, the voltage is output to control the size of a pulse waveform, the given voltage is different through the adjusting encoder 111, the PI adjustment, the final output analog voltage is changed, and the good and bad waveforms are judged through the observation of the PCB.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A PCB detection device for simulating current comprises a positioning plate (4), a base (5), a bracket (1), a switch component (2), a pressing piece (3), an analog mutual inductor module (512) and an adjusting panel (11); the positioning plate (4) is fixed on the base (5) and used for positioning and placing the PCB to be detected; the support (1) is vertically fixed above one side of the base (5), and the pressing piece (3) is connected to the support (1) in a sliding manner; the switch component (2) is connected between the bracket (1) and the pressing piece (3), and the pressing piece (3) is linked to slide towards the direction close to or far away from the positioning plate (4); a detection board (51) is arranged in the base (5), and a plurality of detection circuits for electrically connecting the PCB are arranged on the detection board (51); the analog transformer module (512) is arranged on the detection plate (51) and is used for outputting constant current to the PCB; the adjusting panel (11) is arranged on the bracket (1) and used for outputting given voltage to the PCB.

2. An analog current PCB detection apparatus as claimed in claim 1, wherein: the analog transformer module (512) comprises a voltage stabilizing submodule (5121) and a constant current source submodule (5122), wherein the voltage stabilizing submodule (5121) is used for inputting DC +15V voltage accessed by external equipment and outputting stable +5V voltage; the constant current source submodule (5122) is used for acquiring +5V voltage and outputting constant current for simulating a transformer.

3. An analog current PCB tester as claimed in claim 1, wherein: the adjusting panel (11) is provided with an encoder (111) for outputting different given voltages and an adjusting switch (112) for adjusting the encoder to output the given voltages.

4. An analog current PCB tester as claimed in claim 1, wherein: compress tightly piece (3) and include top panel (32), lower panel (34), go up stand (33), stand (35) and guiding arm (31) down, a plurality of go up between stand (33) are fixed in top panel (32) and lower panel (34), a plurality of the vertical lower surface of fixing panel (34) down of stand (35), be equipped with the sleeve pipe of being connected with guiding arm (31) slide on support (1), the lower extreme of guiding arm (31) is fixed in the middle part of top panel (32), the upper end and the lower extreme of switch part (2) of guiding arm (31) are connected.

5. An analog current PCB detection apparatus as claimed in claim 4, wherein: a guide rod (12) is vertically fixed on the support (1), and the pressing piece (3) is sleeved on the guide rod (12) in a sliding mode.

6. An analog current PCB detection apparatus as claimed in claim 5, wherein: the upper panel (32) and the lower panel (34) of the pressing piece (3) are both provided with sliding sleeves (321) sleeved on the guide rods (12).

7. An analog current PCB tester as claimed in claim 1, wherein: the detection plate (51) is provided with a conductive terminal (511) used for electrically connecting the PCB to be detected, and the conductive terminal (511) penetrates out of the positioning plate (4).

8. An analog current PCB tester as claimed in claim 1, wherein: switch unit (2) are including actuating lever (21) and driven lever (22), and actuating lever (21) upper end articulates on support (1), and actuating lever (21) lower extreme and driven lever (22) upper end are articulated, and the lower extreme of driven lever (22) is articulated with compressing tightly piece (3).

9. An analog current PCB tester as claimed in claim 1, wherein: the outer surface of the base (5) is provided with a voltage display (52) and a voltage switch (53).