CN100442860C - Automatic testing discharge device - Google Patents
Automatic testing discharge device Download PDFInfo
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- CN100442860C CN100442860C CNB2004100151968A CN200410015196A CN100442860C CN 100442860 C CN100442860 C CN 100442860C CN B2004100151968 A CNB2004100151968 A CN B2004100151968A CN 200410015196 A CN200410015196 A CN 200410015196A CN 100442860 C CN100442860 C CN 100442860C
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Abstract
The present invention discloses an automatic discharge testing device which comprises a switching device, a capacitor discharge circuit and a power supply interface for connecting a tested machine core, wherein the switching device comprises two kinds of work states; when the tested machine core is connected into the power supply interface, the switching device and the power supply interface form a power supply loop so as to supply electric power to the tested machine core; when the tested machine core is disconnected with the power supply, the switching device, the capacitor discharge circuit and a vision discharge capacitor form a discharge loop. Because the present invention adopts the proposal, discharge by manual operation is changed to mechanical operation or automatic test discharge. The discharge process is simple, and the production efficiency is improved. The present invention avoids the damage to the machine core by the misoperation of manual discharge, and the test reliability is improved.
Description
[technical field]:
The present invention relates to a kind of capacity measurement electric discharge device, automatic electric discharge device is held in the discharge of looking that relates in particular to a kind of video equipment.
[background technology]:
In electronic manufacturing industry, energising detects as product needed such as television set, displays, can't or must not use the needle-bar frock during some operation test, after energising detects, the very high voltage of power supply electric capacity existence is put in looking of the CRT plate of television set. when these do not have the electric capacity of discharge to meet other element and test man, easily cause components and parts damage on the circuit board.Have only moving the going of armrest to discharge before this.Can cause mistake to be shorted to other components and parts when electric capacity is manually discharged, cause damage; The manual simultaneously used time of discharging is long, influences production efficiency; And and do not know whether electricity bleeds off, the poor reliability that makes test.
[summary of the invention]:
Purpose of the present invention is exactly poor in order to solve above manual discharge reliability, and the problem of inconvenient operation, and a kind of automatic electric discharge device is provided.
For achieving the above object, the present invention proposes a kind of automatic electric discharge device, comprise switching device shifter, capacitor discharging circuit and be used for the power supply interface that tested movement links to each other, described switching device shifter comprises two kinds of operating states, after tested movement inserted the power supply interface, switching device shifter, power supply interface formed current supply circuit, gave tested movement power supply, when tested movement and power supply disconnect, switching device shifter and capacitor discharging circuit with look discharge and hold the formation discharge loop; Described switching device shifter comprises rectification sample circuit and electric-controlled switch (8), and electric-controlled switch (8) control end links to each other with the output of rectification sample circuit, and electric-controlled switch (8) is series on the discharge loop, and the input of rectification sample circuit and power supply source interface are in series.
Owing to adopted above scheme, manually discharge makes mechanically actuated operation or automatic electric discharge into, and discharge process is simple, enhances productivity; Avoid manual discharge misoperation and damaged movement, improved the reliability of test.
[description of drawings]:
Fig. 1 is first kind of embodiment circuit theory diagrams of automatic electric discharge device;
Fig. 2 is second kind of embodiment circuit theory diagrams of automatic electric discharge device;
Fig. 3 is the third embodiment circuit theory diagrams of automatic electric discharge device;
Fig. 4 is the 4th kind of embodiment circuit theory diagrams of automatic electric discharge device.
[embodiment]:
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
Embodiment one: as shown in Figure 1, automatic electric discharge device, comprise switching device shifter 1, discharge circuit 2, be used for the power supply interface 9 and the relay power supply circuits (4) that link to each other with tested movement 10, switching device shifter 1 comprises rectification sample circuit, electric-controlled switch (8), electric-controlled switch (8) is a relay, its control end links to each other with the output of rectification sample circuit, and relay switch is series on the discharge loop, and the input of rectification sample circuit and power supply interface are in series.The rectification sample circuit comprises full-wave rectifying circuit (5) and sampling control circuit (6), and the output of full-wave rectifying circuit (5) is connected to the input of sampling control circuit (6), and the output of sampling control circuit (6) is the output of rectification sample circuit.Discharge circuit (2) comprises first LED 1 that is in series, the first current-limiting resistance R3 and second LED 2 that is in series, the second current-limiting resistance R4, relay is two relays that power control terminal is in parallel, wherein the switch series of a relay is coupled on the discharge loop of being made up of first LED 1 and the first current-limiting resistance R3, the switch series of another relay is coupled on the discharge loop of being made up of second LED 2 and the second current-limiting resistance R4, relay power supply circuits (4) input is used for linking to each other with power supply, and relay power supply circuits (4) output is connected to the power end of relay.Relay power supply circuits (4) comprise transformer (T) and ac rectifier, and the output of transformer (T) is connected to the input of ac rectifier, and the output of ac rectifier is the output of relay power supply circuits (4).Ac rectifier comprises first diode (D1), first filter capacitor (C1), voltage-stabiliser tube (D2) and emitter follower (Q1), the cathode output end of described transformer (T) is connected to the positive pole of first diode (D1), first filter capacitor (C1) is connected between the negative pole and ground of first diode (D1), the cathode output end ground connection of transformer (T), the negative pole of first diode (D1) is through first resistance (R1) or directly be connected to the input of emitter follower (Q1), and voltage-stabiliser tube (D2) is connected between the input and ground of emitter follower (Q1).Sampling control circuit (6) comprises sample resistance (R2), rectifier diode (D3), commutation capacitor (C3) and second emitter follower (C4544), sample resistance (R2) is connected to the output of full-wave rectifying circuit (5), rectifier diode (D3) positive pole connects the full-wave rectifying circuit cathode output end, the negative pole of rectifier diode (D3) directly or be connected to the input of second emitter follower (C4544) through the 3rd resistance (R3), commutation capacitor (C3) is connected between rectifier diode (D3) output and the ground, and the other end is connected to ground.
The operation principle of the foregoing description is as follows: when connecting the 220V power supply, transformer (T) output 35V alternating voltage is through the first diode D1 and the first filter capacitor C1 rectifying and wave-filtering, voltage-stabiliser tube D2 carries out voltage stabilizing, constitute the first emitter follower Q1 by first triode and peripheral circuit thereof, its output 12V direct voltage is given relay R ELAY-SPDT power supply.When connecting load (tested movement 10), load forms current supply circuit by the full-wave bridge and second resistance R 2 and gives tested movement power supply.Take out a voltage through rectifier diode D3 and commutation capacitor C3 rectification from second resistance R 2 simultaneously, the second emitter follower C4544 that control is made of second triode and peripheral circuit thereof as detection signal, thus make its conducting relay R ELAY-SPDT form current supply circuit. and relay is thrown cutter and is communicated with the disconnection discharge loop with switch pin A.2 potential drops of second resistance R are to zero after tested movement outage, the second emitter follower C4544 ends, the relay current supply circuit disconnects, thereby relay is thrown cutter and is linked with discharge pin B, and voltage discharges by current-limiting resistance and light-emitting diode. the electric-controlled switch among the embodiment (8) also can be motor switch and electronic switch.
Embodiment two: as shown in Figure 2, described switching device shifter (1) is a double-point double-throw switch, it comprises first contact, second contact, the 3rd contact and the 4th contact, first contact is used for linking to each other with tested movement 10 power cathodes, second contact and the 4th contact are connected to the first input end mouth and second input port of discharge circuit 2 respectively, discharge circuit 2 comprises first LED 1 that is in series, the 3rd current-limiting resistance R3 and second LED 2 that is in series, the 4th current-limiting resistance R4, first output port of discharge circuit 2 and second output port are through discharge port 20,21 and first look discharge is held and second look the discharge appearance and link to each other.The positive source of tested movement 10 is used for linking to each other with the positive pole of power supply interface, and the cutter of throwing of described double-point double-throw switch is connected to the power supply negative pole, and links to each other with ground.When needs are tested, tested movement 10, look discharge and hold and to be connected in the automatic electric discharge device, double-point double-throw switch is connected to first contact and the 3rd contact, this moment, tested movement 10 formed current supply circuit with power supply and switching device shifter (1), began to carry out the movement test, when test is finished, double-point double-throw switch is thrown to second contact and the 4th contact, this moment, tested movement 10 disconnected, and looked the discharge appearance and formed discharge loop with discharge circuit 2 and switching device shifter (1), looked the discharge discharge capacitor.
Embodiment three, as shown in Figure 3, tested movement 10 is plugged on the power supply interface by plug, the power supply interface links to each other with supply socket, power supply interface negative pole is connected to ground, switching device shifter (1) comprises supply socket and mechanical switch, mechanical switch comprises contact 11 and rotating shaft 12, one end of contact 11 is arranged in the power cathode socket by jack that shell fragment surrounded, but contact 11 phase countershafts 12 rotate, be with torsion spring in the rotating shaft 12, owing to be subjected to the effect of torsion spring, the other end of contact 11 contacts with the contact of discharge circuit 2.Rotating shaft 12 is an electric conductor with contact, it links to each other with ground, the contact of discharge circuit 2 is connected to the negative pole of first LED 1, second LED 2 respectively, and the positive pole of first LED 1, second LED 2 is connected to the 3rd current-limiting resistance R3 and the 4th resistance R 4 respectively.In the plug of tested movement 10 inserted the cavity that the shell fragment in the supply socket surrounds, plug contacted with contact in the socket, and the promotion contact moves down.This moment, the other end and the contact of contact were separated, and discharge loop disconnects.And plug promptly is communicated with owing to contacting with shell fragment, and this moment, tested movement 10 formed the loop with power interface.Can test.When test is finished, the plug of tested movement to be extracted, this moment, contact restored to the original state, and it links to each other with the contact, forms discharge loop, gives and looks the discharge discharge capacitor.Also can expand the light-emitting diode that is in series in the discharge circuit 2 and the quantity of current-limiting resistance as required.
Embodiment four, as shown in Figure 4, be with embodiment three differences, described mechanical switch is two, be called first mechanical switch and second mechanical switch, the contact 11 of first mechanical switch and second mechanical switch insulate mutually with supply socket negative pole and supply socket positive pole, be subjected to the effect of torsion spring, the contact other end of first mechanical switch and second mechanical switch respectively with first contact, second contact contacts, first contact is connected to the positive pole of light-emitting diode, the negative pole of light-emitting diode is connected to ground, and second contact is connected to the input of discharge circuit 2 respectively, and discharge circuit 2 comprises the 3rd current-limiting resistance R3 and the 4th current-limiting resistance R4 that is in parallel.First contact and the second wafer are conducted.
Embodiment five, are that with embodiment one difference the sampling control circuit is a trigger, and the output of trigger receives the rising edge pulse, is changed to high level, when receiving the trailing edge pulse, is changed to low level.
Claims (7)
1, a kind of automatic electric discharge device, it is characterized in that: comprise switching device shifter (1), capacitor discharging circuit (2) and be used for the power supply interface (9) that tested movement (10) links to each other, described switching device shifter (1) comprises two kinds of operating states, after tested movement (10) inserts power supply interface (9), switching device shifter (1), power supply interface form current supply circuit, give tested movement (10) power supply, after tested movement (10) and power supply disconnect, switching device shifter (1) and capacitor discharging circuit (2) with look discharge and hold the formation discharge loop; Described switching device shifter comprises rectification sample circuit and electric-controlled switch (8), and electric-controlled switch (8) control end links to each other with the output of rectification sample circuit, and electric-controlled switch (8) is series on the discharge loop, and the input of rectification sample circuit and power supply source interface are in series.
2, automatic electric discharge device as claimed in claim 1, it is characterized in that: described rectification sample circuit comprises full-wave rectifying circuit (5) and sampling control circuit (6), the output of full-wave rectifying circuit (5) is connected to the input of sampling control circuit (6), and the output of sampling control circuit (6) is the output of rectification sample circuit.
3, automatic electric discharge device as claimed in claim 1 is characterized in that: described electric-controlled switch (8) is a relay.
4, as the arbitrary described automatic electric discharge device of claim 1-3, it is characterized in that: also comprise relay power supply circuits (4), relay power supply circuits (4) input is used for linking to each other with the power supply two ends, and relay power supply circuits (4) output is connected to the power end of relay.
5, automatic electric discharge device as claimed in claim 4, it is characterized in that: described relay power supply circuits (4) comprise transformer (T) and ac rectifier, the input of transformer (T) is used for the power supply two ends and links to each other, the output of transformer (T) is connected to the input of ac rectifier, and the output of ac rectifier is the output of relay power supply circuits (4).
6, automatic electric discharge device as claimed in claim 5, it is characterized in that: described ac rectifier comprises first diode (D1), first filter capacitor (C1), voltage-stabiliser tube (D2) and emitter follower (Q1), the cathode output end of described transformer (T) is connected to the positive pole of first diode (D1), first filter capacitor (C1) is connected between the negative pole and ground of first diode (D1), another output head grounding of transformer (T), the negative pole of first diode (D1) is through first resistance (R1) or directly be connected to the input of emitter follower (Q1), and voltage-stabiliser tube (D2) is connected between the input and ground of emitter follower (Q1).
7, automatic electric discharge device as claimed in claim 2, it is characterized in that: sampling control circuit (6) comprises sample resistance (R2), rectifier diode (D3), commutation capacitor (C3) and second emitter follower (C4544), sample resistance (R2) is connected to the output of full-wave rectifying circuit (5), rectifier diode (D3) positive pole connects the full-wave rectifying circuit cathode output end, the negative pole of rectifier diode (D3) directly or through the 3rd resistance (R3) is connected to the input of second emitter follower (C4544), and commutation capacitor (C3) is connected between the output and ground of rectifier diode (D3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100151968A CN100442860C (en) | 2004-01-17 | 2004-01-17 | Automatic testing discharge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100151968A CN100442860C (en) | 2004-01-17 | 2004-01-17 | Automatic testing discharge device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1558684A CN1558684A (en) | 2004-12-29 |
| CN100442860C true CN100442860C (en) | 2008-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100151968A Expired - Fee Related CN100442860C (en) | 2004-01-17 | 2004-01-17 | Automatic testing discharge device |
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| CN (1) | CN100442860C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102209333B (en) * | 2010-03-31 | 2014-08-20 | 大唐移动通信设备有限公司 | Power supply control method and equipment |
| CN103296663B (en) * | 2012-02-27 | 2016-10-05 | 珠海格力电器股份有限公司 | The discharge circuit of air-conditioner and air-conditioner bus capacitor and discharge control method |
| CN105630122A (en) * | 2014-10-31 | 2016-06-01 | 鸿富锦精密工业(武汉)有限公司 | Power control apparatus |
| CN109869879A (en) * | 2019-03-06 | 2019-06-11 | 珠海格力电器股份有限公司 | Air conditioner control circuit and its discharge circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59190672A (en) * | 1983-04-12 | 1984-10-29 | Nissin Electric Co Ltd | Measurement of corona for electric equipment |
| JPS61151469A (en) * | 1984-12-25 | 1986-07-10 | Nikka Seiki Kk | Condenser type rotary electrostatic voltmeter |
| CN1211135A (en) * | 1997-06-27 | 1999-03-17 | 船井电机株式会社 | CRT driving circuit |
| CN2508489Y (en) * | 2001-12-24 | 2002-08-28 | 海信集团有限公司 | Composite turn-off color spot and light spot eliminating circuit |
-
2004
- 2004-01-17 CN CNB2004100151968A patent/CN100442860C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59190672A (en) * | 1983-04-12 | 1984-10-29 | Nissin Electric Co Ltd | Measurement of corona for electric equipment |
| JPS61151469A (en) * | 1984-12-25 | 1986-07-10 | Nikka Seiki Kk | Condenser type rotary electrostatic voltmeter |
| CN1211135A (en) * | 1997-06-27 | 1999-03-17 | 船井电机株式会社 | CRT driving circuit |
| CN2508489Y (en) * | 2001-12-24 | 2002-08-28 | 海信集团有限公司 | Composite turn-off color spot and light spot eliminating circuit |
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| CN1558684A (en) | 2004-12-29 |
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Granted publication date: 20081210 Termination date: 20120117 |