CN213544742U - Circuit of automatic circuit board detection equipment - Google Patents
Circuit of automatic circuit board detection equipment Download PDFInfo
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- CN213544742U CN213544742U CN202021470046.7U CN202021470046U CN213544742U CN 213544742 U CN213544742 U CN 213544742U CN 202021470046 U CN202021470046 U CN 202021470046U CN 213544742 U CN213544742 U CN 213544742U
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Abstract
The utility model provides a circuit of automatic circuit board detection equipment, which meets the requirements of high voltage and electrical function detection of circuit boards and comprises relays K1, K2 and K3; the common contacts of the first switch branch and the fourth switch branch in the relay K1 are respectively connected to the N end, and the common contacts of the second switch branch and the third switch branch are respectively connected to the L end; two ends of a coil part of the relay K2 are respectively connected with normally open contacts of the third switch branch and the fourth switch branch; the switch branch of the relay K2 is connected between a normally open contact of a switch branch I of the relay K1 and a voltage output terminal; a switch branch six of the relay K2 is connected between a normally open contact of a switch branch two of the relay K1 and a voltage output terminal; a switch branch seven of the relay K2 is connected between a normally closed contact of a switch branch three of the relay K1 and a coil part of the relay K3; and a switch branch eight and a switch branch nine in the relay K3 are respectively connected between the high-voltage terminal and the voltage output terminal.
Description
Technical Field
The utility model is used for circuit board high pressure and electrical function detect, concretely relates to circuit board automatic check out test set's circuit.
Background
The factory test of the television circuit board needs to pass through the procedures of high voltage test, 12V power supply test, LED backlight and the like, and the existing test mode is that a high voltage detector is firstly utilized to apply high voltage (such as 3780V) to the circuit board and detect whether the electrical index of the circuit board meets the standard, and a specific qualified threshold value is set in the high voltage detector; and when the high voltage detection is qualified, applying 220V commercial power to the circuit board to operate so as to detect whether the power supply and the LED backlight meet the standard or not. In the process, a worker manually changes the detection instrument to switch the voltage, or two testing stations of high voltage and mains supply are required to be arranged, the detection cost is increased, and the detection efficiency is also reduced.
In fact, the switching of test voltage and the detection of circuit board electrical parameter can be realized through designing a circuit board automatic checkout equipment, and it is by designing its voltage output switching circuit of leading first, the utility model discloses make the research and form technical scheme to this.
SUMMERY OF THE UTILITY MODEL
Based on the problem mentioned in the background art, the utility model provides a circuit of circuit board automatic check out test set realizes high pressure and 220V commercial power output's switching control, satisfies the demand that circuit board high pressure and electrical function detected, and its concrete technical content is as follows:
a circuit of automatic circuit board detection equipment comprises a voltage output switching circuit; the voltage output switching circuit comprises mains supply terminals L and N, a high-voltage terminal, a voltage output terminal and relays K1, K2 and K3; the common contacts of the first switch branch and the fourth switch branch in the relay K1 are respectively connected to the N end, and the common contacts of the second switch branch and the third switch branch are respectively connected to the L end; two ends of a coil part of the relay K2 are respectively connected with normally open contacts of the third switch branch and the fourth switch branch; the switch branch five of the relay K2 is normally open and is connected between a normally open contact of the switch branch I of the relay K1 and a voltage output terminal; the switch branch circuit six of the relay K2 is normally open and is connected between a normally open contact of the switch branch circuit two of the relay K1 and a voltage output terminal; the switch branch seven of the relay K2 is normally closed and is connected between a normally closed contact of the switch branch three of the relay K1 and a coil part of the relay K3; the eight switch branch and the nine switch branch in the relay K3 are normally open and are respectively connected between a high-voltage terminal and a voltage output terminal, and the high-voltage terminal is connected to a high-voltage tester to obtain high-voltage electric output; the on/off of the relay K1 realizes the switching control of the commercial power output and the high-voltage output.
In one or more embodiments of the present invention, the high voltage tester has a PASS switch that is turned on when the high voltage test is passed, the coil portion of the relay K1 is grounded via the PASS switch, and the on/off of the PASS switch realizes the switching control of the commercial power output and the high voltage output.
In one or more embodiments of the present invention, the low voltage end of the coil portion of the relay K3 is connected to the normally closed contact of the switch branch four of the relay K1.
In one or more embodiments of the present invention, the voltage output switching circuit further includes a relay KT1, a coil portion of the relay KT1 is connected in parallel with a coil portion of the relay K1; the switch branch of the relay KT1 is normally open, and is connected between a normally open contact of a switch branch III of the relay K1 and a coil part of the relay K2; the switch branch eleventh of the relay KT1 is normally open and is connected between the normally open contact of the switch branch IV of the relay K1 and the coil part of the relay K2.
In one or more embodiments of the present invention, the circuit of the automatic circuit board inspection device includes a cylinder control circuit, the cylinder control circuit includes a first start button, a second start button, relays K4, K5 and KT2, and a solenoid valve for driving a cylinder; the common contact of a switch branch twelve of the relay K5 is connected with a 12V power supply, and the normally open contact of the relay K5 is connected with an electromagnetic valve; a common contact of a switch branch thirteen of the relay K5 is connected with a 12V power supply, and a starting button I and a starting button II are connected in series between a normally open contact of the relay K5 and the 12V power supply; a common contact of a switch branch fourteen of the relay KT2 is connected with a low potential end of a coil part of the relay K5, and a normally closed contact of the relay is grounded; a common contact of a switching branch fifteen of the relay KT2 is connected with a normally open contact of a switching branch sixteen of the relay K4, and a normally closed contact of the relay KT2 is connected with a high potential end of a coil part of the relay K4 and is commonly connected with a control terminal; the common contact of a switch branch sixteen of the relay K4 is connected to a 12V power supply; simultaneously turning on the first starting button and the second starting button to start an electromagnetic valve driving cylinder, and latching the on state of the relay K5; and the control terminal is used for outputting a voltage when the test is finished, so that the electromagnetic valve is closed, and the air cylinder is reset.
In one or more embodiments of the present invention, the common contact of the switching branch seventeen of the relay K4 is connected to the low potential end of the coil portion of the relay K1 via the PASS switch, and the normally closed contact thereof is grounded.
In one or more embodiments of the present invention, the relays KT1 and KT2 are time delay relays.
The utility model has the advantages that: the switching control of high voltage and 220V mains supply output is realized through a voltage output switching circuit, the requirements of high voltage and electrical function detection of a circuit board are met, particularly, the output switching is controlled through a PASS switch in a high-voltage tester, the voltage output switching circuit outputs 3780V high voltage in an initial state, the PASS switch is conducted after the high-voltage tester is qualified in detection, the output is immediately switched to 220V mains supply, and therefore the electrical function detection of the board is carried out, and a time delay relay KT1 is further arranged to realize discharge time delay; meanwhile, the driving control of the air cylinder is realized through the air cylinder control circuit, so that the pressing plate is driven to compress and limit the circuit board in the detection process, and the circuit board is lifted and reset after the detection is passed.
Drawings
Fig. 1 is a schematic diagram of the automatic circuit board detection device applied in the present invention.
Fig. 2 is a schematic diagram of the voltage output switching circuit of the present invention.
Fig. 3 is a schematic diagram of the cylinder control circuit of the present invention.
Detailed Description
The scheme of the application is further described as follows:
referring to the attached figure 1, the automatic circuit board detection equipment comprises a high-voltage detector 1, a voltmeter and an ammeter 2, a cylinder 3, a pressing plate 4 and a test needle plate 5; before testing, a circuit board 6 to be tested is placed on a test needle plate 5, and a high-voltage detector 1, a voltmeter and an ammeter 2 are arranged according to the data requirement of the tested needle plate; the test is started by pressing a start button, the pressing plate is driven by the air cylinder 3 to be pressed onto the circuit board 6 to be tested, then the high-voltage test, the DC12 test and the LED backlight test are executed, the test to be tested is completed, and the pressing plate 4 is lifted so as to take out the circuit board 6 to be tested. The circuit of the automatic circuit board detection device, which corresponds to the circuit part for realizing the functions, comprises a voltage output switching circuit and a cylinder control circuit;
referring to fig. 2, the voltage output switching circuit includes mains terminals L and N, a high voltage terminal HV, a voltage output terminal J1, and relays K1, K2, K3, and KT 1; the common contacts of a first switch branch 101 and a fourth switch branch 104 in the relay K1 are respectively connected to the N end, and the common contacts of a second switch branch 102 and a third switch branch 103 are respectively connected to the L end; two ends of a coil part of the relay K2 are respectively connected with the normally open contacts of the switching branch III 103 and the switching branch IV 104; the switch branch five 105 of the relay K2 is normally open and is connected between a normally open contact of the switch branch one 101 of the relay K1 and a voltage output terminal J1; the switch branch six 106 of the relay K2 is normally open and is connected between the normally open contact of the switch branch two 102 of the relay K1 and the voltage output terminal J1; a switching branch seven 107 of the relay K2 is normally closed and is connected between a normally closed contact of a switching branch three 103 of the relay K1 and a coil part of the relay K3; a switch branch eight 108 and a switch branch nine 109 in the relay K3 are normally open and are respectively connected between a high-voltage terminal HV and a voltage output terminal J1, and the high-voltage terminal HV is connected to the high-voltage tester 1 to obtain high-voltage electric output; the low-voltage end of the coil part of the relay K3 is connected to the normally closed contact of the switch branch IV 104 of the relay K1. The coil part of the relay KT1 is connected in parallel with the coil part of the relay K1; the switch branch 110 of the relay KT1 is normally open and is connected between a normally open contact of the switch branch III 103 of the relay K1 and a coil part of the relay K2; the switch branch eleven 111 of the relay KT1 is normally open and is connected between the normally open contact of the switch branch IV 104 of the relay K1 and the coil part of the relay K2.
Preferably, the on/off of the relay K1 controls the switching between the commercial power output and the high voltage output, and the output switching in this embodiment is controlled by a PASS switch in the high voltage tester 1, that is, the high voltage tester 1 has a PASS switch that is turned on when the high voltage test is passed, the coil portion of the relay K1 is grounded via the PASS switch, and the on/off of the PASS switch controls the switching between the commercial power output and the high voltage output. The voltage output switching circuit outputs 3780V high voltage in an initial state, the PASS switch is conducted after the high voltage tester detects the PASS, and the output is immediately switched to 220V commercial power, so that the board electric function is detected.
Referring to fig. 3, the cylinder control circuit includes a start button one 7, a start button two 8, relays K4, K5 and KT2, and a solenoid valve 9 for driving the cylinder; the common contact of a switch branch twelve 112 of the relay K5 is connected with a 12V power supply, and the normally open contact of the relay K5 is connected with the electromagnetic valve 9; the common contact of a switch branch thirteen 113 of the relay K5 is connected with a 12V power supply, and a starting button I7 and a starting button II 8 are connected between a normally open contact of the relay K5 and the 12V power supply in series; a common contact of a switch branch fourteen 114 of the relay KT2 is connected with a low potential end of a coil part of the relay K5, and a normally closed contact of the relay is grounded; a common contact of a switching branch fifteen 115 of the relay KT2 is connected with a normally open contact of a switching branch sixteen 116 of the relay K4, and the normally closed contact of the relay KT2 is connected with a coil part high-potential end of the relay K4 and is commonly connected with a control terminal J2; the common contact of the sixteen 116 switch branches of the relay K4 is connected to a 12V power supply; simultaneously turning on the first starting button 7 and the second starting button 8 to start the electromagnetic valve 9 to drive the air cylinder, and latching the on state of the relay K5; the control terminal J2 can be a controller connected with the automatic circuit board detection device or connected with the high-voltage tester 1 to output a voltage when the test is finished, so that the electromagnetic valve 9 is closed and the air cylinder is reset.
The common contact of the switching branch seventeen 117 of the relay K4 is connected to the low potential end of the coil part of the relay K1 by the PASS switch, and the normally closed contact of the relay K4 is grounded; preferably, the relays KT1 and KT2 are time delay relays to realize discharge time delay.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.
Claims (7)
1. The utility model provides a circuit of circuit board automated inspection equipment which characterized in that: comprises a voltage output switching circuit; the voltage output switching circuit comprises mains supply terminals L and N, a high-voltage terminal, a voltage output terminal and relays K1, K2 and K3;
the common contacts of the first switch branch and the fourth switch branch in the relay K1 are respectively connected to the N end, and the common contacts of the second switch branch and the third switch branch are respectively connected to the L end;
two ends of a coil part of the relay K2 are respectively connected with normally open contacts of the third switch branch and the fourth switch branch; the switch branch five of the relay K2 is normally open and is connected between a normally open contact of the switch branch I of the relay K1 and a voltage output terminal; the switch branch circuit six of the relay K2 is normally open and is connected between a normally open contact of the switch branch circuit two of the relay K1 and a voltage output terminal; the switch branch seven of the relay K2 is normally closed and is connected between a normally closed contact of the switch branch three of the relay K1 and a coil part of the relay K3;
the eight switch branch and the nine switch branch in the relay K3 are normally open and are respectively connected between a high-voltage terminal and a voltage output terminal, and the high-voltage terminal is connected to a high-voltage tester to obtain high-voltage electric output; the on/off of the relay K1 realizes the switching control of the commercial power output and the high-voltage output.
2. The circuit of the automatic circuit board detection device according to claim 1, wherein: the high-voltage tester is provided with a PASS switch which is conducted when the high-voltage test is qualified, a coil part of the relay K1 is grounded through the PASS switch, and the switching control of commercial power output and high-voltage power output is realized by the on/off of the PASS switch.
3. The circuit of the automatic circuit board detection device according to claim 2, wherein: the low-voltage end of the coil part of the relay K3 is connected to the normally closed contact of the switch branch IV of the relay K1.
4. The circuit of the automatic circuit board detection device according to claim 2, wherein: the voltage output switching circuit also comprises a relay KT1, wherein a coil part of the relay KT1 is connected with a coil part of a relay K1 in parallel; the switch branch of the relay KT1 is normally open, and is connected between a normally open contact of a switch branch III of the relay K1 and a coil part of the relay K2; the switch branch eleventh of the relay KT1 is normally open and is connected between the normally open contact of the switch branch IV of the relay K1 and the coil part of the relay K2.
5. The circuit of automatic circuit board detection equipment according to any one of claims 2 to 4, wherein: the cylinder control circuit comprises a first starting button, a second starting button, relays K4, K5 and KT2 and an electromagnetic valve for driving the cylinder;
the common contact of a switch branch twelve of the relay K5 is connected with a 12V power supply, and the normally open contact of the relay K5 is connected with an electromagnetic valve; a common contact of a switch branch thirteen of the relay K5 is connected with a 12V power supply, and a starting button I and a starting button II are connected in series between a normally open contact of the relay K5 and the 12V power supply;
a common contact of a switch branch fourteen of the relay KT2 is connected with a low potential end of a coil part of the relay K5, and a normally closed contact of the relay is grounded; a common contact of a switching branch fifteen of the relay KT2 is connected with a normally open contact of a switching branch sixteen of the relay K4, and a normally closed contact of the relay KT2 is connected with a high potential end of a coil part of the relay K4 and is commonly connected with a control terminal; the common contact of a switch branch sixteen of the relay K4 is connected to a 12V power supply;
simultaneously turning on the first starting button and the second starting button to start an electromagnetic valve driving cylinder, and latching the on state of the relay K5; and the control terminal is used for outputting a voltage when the test is finished, so that the electromagnetic valve is closed, and the air cylinder is reset.
6. The circuit of circuit board automatic detection equipment according to claim 5, characterized in that: the common contact of the switching branch seventeen of the relay K4 is connected to the low potential end of the coil part of the relay K1 through the PASS switch, and the normally closed contact of the relay K4 is grounded.
7. The circuit of circuit board automatic detection equipment according to claim 5, characterized in that: the relays KT1 and KT2 are time delay relays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021470046.7U CN213544742U (en) | 2020-07-23 | 2020-07-23 | Circuit of automatic circuit board detection equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021470046.7U CN213544742U (en) | 2020-07-23 | 2020-07-23 | Circuit of automatic circuit board detection equipment |
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| CN213544742U true CN213544742U (en) | 2021-06-25 |
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| CN202021470046.7U Active CN213544742U (en) | 2020-07-23 | 2020-07-23 | Circuit of automatic circuit board detection equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117275401A (en) * | 2023-11-03 | 2023-12-22 | 中山市智牛电子有限公司 | Image reduction circuit, LED display screen control card and image scaling method |
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2020
- 2020-07-23 CN CN202021470046.7U patent/CN213544742U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117275401A (en) * | 2023-11-03 | 2023-12-22 | 中山市智牛电子有限公司 | Image reduction circuit, LED display screen control card and image scaling method |
| CN117275401B (en) * | 2023-11-03 | 2024-02-27 | 中山市智牛电子有限公司 | Image reduction circuit, LED display screen control card and image scaling method |
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