CN201242586Y - Detection device for electrical leakage sensor printed circuit board - Google Patents
Detection device for electrical leakage sensor printed circuit board Download PDFInfo
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- CN201242586Y CN201242586Y CNU2008201095579U CN200820109557U CN201242586Y CN 201242586 Y CN201242586 Y CN 201242586Y CN U2008201095579 U CNU2008201095579 U CN U2008201095579U CN 200820109557 U CN200820109557 U CN 200820109557U CN 201242586 Y CN201242586 Y CN 201242586Y
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- leakage sensor
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- circuit board
- printed circuit
- electricity leakage
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Abstract
The utility model discloses a detecting device used for an electric leakage sensor printed circuit board. The detecting device comprises a switching element used for switching aging state and debugging state, an aging circuit and a debugging resistance circuit, wherein the aging circuit is electrically connected with the aging state switching terminal of the switching element and provides intermittent aging electrical current for the electric leakage sensor printed circuit board; the debugging resistance circuit is electrically connected with the debugging state switching terminal of the switching element and provides different debugging resistances for the electric leakage sensor printed circuit board; wherein the electric leakage sensor printed circuit board is electrically connected with the aging circuit or the debugging resistance circuit through the switching element. The detecting device can automatically detects the aging and adjusting problems of the electric leakage sensor printed circuit board, thereby saving measuring equipment and manpower.
Description
Technical field
The utility model relates to a kind of testing apparatus, relates in particular to a kind of device that electricity leakage sensor printed circuit board (PCB) (PCB) detects that is used for.
Background technology
The leakage tests frock is to be exclusively used in electric motor car electricity leakage sensor printed circuit board (PCB) (PCB) at present to produce a kind of quick test fixture when finishing, various bad results such as the leakage weldering that purpose produces when being to detect the printed circuit board (PCB) welding, rosin joint, wrong weldering.Existing electricity leakage sensor PCB test mainly is manually to utilize utensil such as multimeter oscillograph to remove to measure electricity leakage sensor PCB to go up each key point voltage, and shows by the oscillographic voltage of multimeter whether detect corresponding test point has problems.
In development finished product detection and debug process, the method for testing of this electricity leakage sensor PCB needs manual operation that a plurality of test points on the plate are tested respectively, and needs the interim source of welding current, signal wire harness constant pitch point.
Therefore, existing electricity leakage sensor PCB test fixture is waste of manpower and time not only, and when having the debug circuit plate, the complicated procedures of forming of the interim source of welding current and signal wire harness.
The utility model content
The purpose of this utility model is intended to one of solve the aforementioned problems in the prior at least.
For this reason, embodiment of the present utility model proposes a kind of pick-up unit that is used for the electricity leakage sensor printed circuit board (PCB), and to detect the aging and debugging problem of this printed circuit board (PCB) automatically, described pick-up unit comprises: the switching device that switches ageing state and debugging mode; Aging circuit, described aging circuit is electrically connected and provides intermittently aging electric current to described electricity leakage sensor printed circuit board (PCB) with the ageing state switch terminal of described switching device; The debugging resistance circuit, described debugging resistance circuit and the electrical connection of described switching device debugging mode switch terminal and the debugging resistance of different resistances is provided to described electricity leakage sensor printed circuit board (PCB); Wherein said electricity leakage sensor printed circuit board (PCB) is electrically connected with described aging circuit or described debugging resistance circuit by described switching device.
According to the further embodiment of the utility model, described pick-up unit also comprises alarm element, and described alarm element and described electricity leakage sensor printed circuit board (PCB) are connected and provide the aging alerting signal of described electricity leakage sensor printed circuit board (PCB) for probe.
According to the further embodiment of the utility model, described pick-up unit also comprises voltage display circuit, and described voltage display circuit is each test point voltage that probe is connected and shows respectively described electricity leakage sensor printed circuit board (PCB) with described electricity leakage sensor printed circuit board (PCB).
Pick-up unit of the present utility model is by the switching of aging circuit and debug circuit, thereby can test out the problem under the electricity leakage sensor printed circuit board (PCB) different conditions automatically, therefore not only simple to operate, save cost and work efficiency higher, realize the mass-produced purpose of production line.
In addition, the utility model adopts probe to connect each test point, and the operation of the interim source of welding current and signal wire harness when having avoided the circuit board debugging is therefore easy to operate and debugging is convenient.
Aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Description of drawings
Above-mentioned and/or additional aspect of the present utility model and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the electrical block diagram of the pick-up unit that is used for the electricity leakage sensor printed circuit board (PCB) of the utility model embodiment;
Fig. 2 is used for the specific embodiment synoptic diagram of switching device, aging circuit and the debugging resistance circuit of the pick-up unit of electricity leakage sensor printed circuit board (PCB) for the utility model;
Fig. 3 is used for the alarm element of pick-up unit of electricity leakage sensor printed circuit board (PCB) and the specific embodiment synoptic diagram of voltage display circuit for the utility model; And
Fig. 4 is used for the specific embodiment synoptic diagram of power circuit of the pick-up unit of electricity leakage sensor printed circuit board (PCB) for the utility model.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the utility model, and can not be interpreted as restriction of the present utility model.
With reference to figure 1, this figure is the electrical block diagram of the pick-up unit that is used for electricity leakage sensor printed circuit board (PCB) (PCB) of the utility model embodiment.
As shown in the figure, testing circuit includes switching device 2, aging circuit 6, debugging resistance circuit 8, switching device 2 is used to switch ageing state and debugging mode, aging circuit 6 is electrically connected with the ageing state switch terminal of switching device 2, and debugging resistance circuit 8 is electrically connected with the debugging mode switch terminal of switching device 2.Switching device 2 other ends are connected with electricity leakage sensor PCB 4, thereby switch by its state, and electricity leakage sensor PCB 4 is connected with aging circuit 6 or debugging resistance circuit 8.When electricity leakage sensor PCB 4 was connected with aging circuit 6, aging circuit 6 provided intermittently aging electric current to electricity leakage sensor PCB 4.When electricity leakage sensor PCB 4 is connected with debugging resistance circuit 8,8 debugging resistance that different resistances are provided to electricity leakage sensor PCB 4 of debugging resistance circuit.
Under different conditions, electricity leakage sensor PCB 4 is worn out and debugs.The loop of forming with electricity leakage sensor PCB 4 respectively according to aging circuit 6 and debugging resistance circuit 8, electric electric current of the leakance that will wear out or debugging leakage current input to electricity leakage sensor PCB 4, thereby the leakage current according to above-mentioned form detects the problem that may exist of electricity leakage sensor PCB 4 under different conditions, and carries out the relevant detection indication by alarm element 12 or voltage display circuit 14.
Here, alarm element 12 is set is electrically connected, and the aging alerting signal of electricity leakage sensor PCB 4 is provided with electricity leakage sensor PCB 4.For example,, problem occurred after promptly electricity leakage sensor PCB 4 processes constantly wear out, then provided certain signal prompt when electricity leakage sensor PCB 4 does not detect corresponding leakage current.Equally, voltage display circuit 14 is set to be electrically connected with electricity leakage sensor PCB 4, and show each test point voltage of electricity leakage sensor PCB respectively, thereby according to the voltage displayed value find out that each test point of electricity leakage sensor PCB 4 exists such as leaking variety of issues such as weldering, rosin joint, wrong weldering.
In addition, by power circuit 10 is set, thereby provide ± the 15V direct supply to power supply electricity leakage sensor PCB 4.
Below in conjunction with Fig. 2 to Fig. 4 the specific embodiment of foregoing circuit or element is made detailed description.
Fig. 2 is the specific embodiment synoptic diagram of switching device, aging circuit and the debugging resistance circuit of the utility model pick-up unit, Fig. 3 is the alarm element of the utility model pick-up unit and the specific embodiment synoptic diagram of voltage display circuit, and Fig. 4 is the specific embodiment synoptic diagram of the power circuit of the utility model pick-up unit.
As shown in Figure 2, an embodiment of switching device 2 is automatic and manual change-over switch S1, and S1 for example is the single-pole double-throw switch (SPDT) of SW-SPDT model.1 end of switch S1 is represented aging switch terminal, and this end is connected with aging circuit 6, and this end is set is automatic end.3 ends of switch S1 represent to debug switch terminal, and this end is connected with debugging resistance circuit 8, and it is normal-closed end that this end is set.And, show that as figure 2 ends of switch S1 are connected with electricity leakage sensor PCB 4.Certainly, switching device 2 of the present utility model is not limited to the switch of Fig. 2 embodiment, and the state switching device of existing any kind all can be used as switching device of the present utility model.
In addition, as shown in Figure 2, aging circuit 6 comprises signal generator 62, relay 64, age resistor R21 and general resistance R 22.Signal generator 62 comprises NE555 time base circuit and N type metal-oxide semiconductor MOS transistor Q1, and the input end of nmos pass transistor Q1 is connected with the output terminal of NE555 time base circuit, and the coil of the output terminal of Q1 and relay K 1 is connected.
By the diagram circuit structure, when NE555 time base circuit output low level, the level of exporting between nmos pass transistor Q1 and the K1 coil node is a high level, and at this moment automatic aging K switch 1 still keeps the normally off end.1 of automatic aging K switch and general resistance R 22 form closed-loop paths, and the less general leakage current of generation current value is transferred to electricity leakage sensor PCB 4.At this moment, 4 of electricity leakage sensor PCB can detect a general electric leakage signal.
When NE555 time base circuit output high level, the level of exporting between nmos pass transistor Q1 and the K1 coil node is a low level, at this moment nmos pass transistor Q1 drive coil adhesive automatic aging K switch 1 switches to the ageing state end, form the closed-loop path with age resistor R21, thereby produce the very big serious leakage current of current value, and output to electricity leakage sensor PCB 4.At this moment, 4 of electricity leakage sensor PCB can detect a serious electric leakage signal.
Therefore, the spacing pulse signal that produces analog insulation resistance by signal generator 62 drives being connected and disconnection of K1 and age resistor R21, thereby constantly short circuit resistance is to reach the purpose of tracking sensor PCB.
Embodiment as shown in Figure 2, debugging resistance circuit 8 comprises a plurality of pull-up resistor R26 to R31 with different resistance values, one end of a plurality of pull-up resistors is connected with electricity leakage sensor PCB 4 respectively, and is provided with multi-gear switch S2 between the other end of the debugging switch terminal 3 of switch S1 and a plurality of pull-up resistors.Multi-gear switch S2 for example is 6 way switch, and its each switch terminal connects with corresponding pull-up resistor respectively.When S1 switches to the resistance debugging mode, closed-loop path by multi-gear switch S2 and corresponding debugging pull-up resistor and electricity leakage sensor PCB 4 formation, can simulate leakage circuit in various degree, change thereby can measure electric current, detect PCB and go up the Welding Problems that test point exists each test point on the electricity leakage sensor PCB 4.And under kilter, divide the critical point that discerns general electric leakage and serious electric leakage, the sensitivity of measuring electricity leakage sensor according to the debugging electrorheological.
Now, make description with reference to the specific embodiment of 3 pairs of alarm elements of figure and voltage display circuit.As indicated above, alarm element is connected with electricity leakage sensor PCB respectively with voltage display circuit, provides corresponding indication with the electricity leakage sensor PCB to ageing state and debugging mode respectively.In the embodiment that Fig. 3 shows, alarm element comprises light emitting diode DS1 and light emitting diode DS2, and they are respectively applied for the electric leakage signal warning of indication electricity leakage sensor PCB when connecting age resistor R21 and be connected general resistance R 22.Specifically, light emitting diode DS1 is connected on the electricity leakage sensor PCB by the LD2 port, provides corresponding indication with the serious electric leakage signal that detects according to electricity leakage sensor PCB.Similarly, light emitting diode DS2 is connected on the electricity leakage sensor PCB by the LD1 port, provides corresponding indication with the general electric leakage signal that detects according to electricity leakage sensor PCB.For example, be provided with when detecting serious electric leakage signal, light emitting diode DS1, DS2 are simultaneously luminous, when detecting general electric leakage signal, are provided with that only light emitting diode DS2 is luminous.When electricity leakage sensor PCB breaks down, light emitting diode DS1 and/or DS2 are set close or Chang Liang.In addition, alarm element can also comprise a light emitting diode DS3, as power light.Certainly, alarm element of the present utility model is not limited to this specific embodiment, for example, can only utilize the different conditions of the different colours indication expression electricity leakage sensor PCB of a light emitting diode, perhaps can use the luminous display unit of other types to replace light emitting diode.
Refer again to Fig. 3, the voltage display circuit of illustrated embodiment comprises DC voltage gauge outfit V and multi-gear switch S3, multi-gear switch S3 for example is 12 road multi-gear switchs, each test point T1-T6 of its different input switch terminal and electricity leakage sensor PCB and the internal electrical pressure side of electricity leakage sensor (+5V/-5V) being electrically connected accordingly, its output terminal is connected with DC voltage gauge outfit V.Under debugging mode, each test point of electricity leakage sensor PCB is according to the leakage currents of the different sizes of different debugging pull-up resistor output, and can directly switch the voltage of different test points by rotary switch S3, and shows by voltmeter head V.According to the voltage displayed value of voltmeter head V, thereby can detect the various Welding Problems of each test point.Equally, by demonstration, also can judge the problem that electricity leakage sensor self exists to electricity leakage sensor PCB builtin voltage.
As a preferred embodiment of the present utility model, display element and voltage display circuit are connected with electricity leakage sensor PCB by the connector P2 such as I3P.By adopting the needle-bar formula crimping way of contact.The operation of interim welding wire harness reduces measuring equipment and manpower in the time of can removing debugging electricity leakage sensor circuit board from.
With reference now to Fig. 4,, power circuit 10 is made specific descriptions.Power circuit as indicated above is used for providing ± the 15V direct supply to power supply electricity leakage sensor PCB 4.As shown in Figure 4, power circuit comprises Industrial Frequency Transformer T1, the first commutation diode D1 and the second commutation diode D2, the first filter capacitor C3 and the second filter capacitor C4, the first voltage stabilizer U1 and the second voltage stabilizer U2.
Industrial Frequency Transformer T1 is connected with the power supply P1 that 220 volts of AC power are provided by thermal fuse F 1, and alternating current 220V is converted to interchange 15V.The output terminal of Industrial Frequency Transformer T1 is connected respectively to the electrode input end of the first commutation diode D1, and the negative input of the second commutation diode D2, thereby export positive negative dc voltage respectively by the half-wave rectification of the first commutation diode D1 and the second commutation diode D2.
In addition, the cathode output end of the first commutation diode D1 is connected with the first filter capacitor C3, and the cathode output end of the second commutation diode D2 is connected with the second filter capacitor C4, therefore by filter capacitor D1 and D2 the positive negative dc voltage that first and second commutation diode D1, D2 export is carried out filtering respectively, disturb the DC voltage that obtains being scheduled to remove.The output terminal of the first filter capacitor C3 and the second filter capacitor C4 also respectively correspondence be connected on the first voltage stabilizer U1 and the second voltage stabilizer U2, here the first voltage stabilizer U1 is used for the positive voltage voltage stabilizing, the second voltage stabilizer U2 is used for the negative voltage voltage stabilizing, for example adopting model among this embodiment is the three terminal regulator of L78M15ABV and L7915ABV, thereby the positive and negative dc voltage stability that will import respectively is on the numerical value of ± 15V.Show as Fig. 4, the output terminal of the first voltage stabilizer U1 can also be connected with two shunt capacitance wave filter C1 and C2, and the output terminal of the second voltage stabilizer U2 is connected with the capacitor filter C5 and the C6 of two parallel connections, further output voltage is carried out filtering, obtain more stable accurate magnitude of voltage to be provided for the direct supply of power supply electricity leakage sensor PCB.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that under the situation that does not break away from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification that scope of the present utility model is by claims and be equal to and limit to these embodiment.
Claims (10)
1. a pick-up unit that is used for the electricity leakage sensor printed circuit board (PCB) is characterized in that, described pick-up unit comprises:
Switch the switching device of ageing state and debugging mode;
Aging circuit, described aging circuit is electrically connected and provides intermittently aging electric current to described electricity leakage sensor printed circuit board (PCB) with the ageing state switch terminal of described switching device;
The debugging resistance circuit, described debugging resistance circuit and the electrical connection of described switching device debugging mode switch terminal and the debugging resistance of different resistances is provided to described electricity leakage sensor printed circuit board (PCB); Wherein
Described electricity leakage sensor printed circuit board (PCB) is electrically connected with described aging circuit or described debugging resistance circuit by described switching device.
2. pick-up unit as claimed in claim 1, it is characterized in that, described aging circuit comprises signal generator, relay and age resistor, described relay is arranged between described switching device and described age resistor one end, the described age resistor other end is connected with described electricity leakage sensor printed circuit board (PCB), and described signal generator is connected with described relay printed circuit board (PCB) and provides the spacing pulse signal to drive being connected and disconnection of described relay and described age resistor.
3. pick-up unit as claimed in claim 2, it is characterized in that, described signal generator comprises NE555 time base circuit and the metal-oxide semiconductor MOS transistor of exporting high-low level, described MOS transistor input end is connected with described NE555 time base circuit, and output terminal is connected with described relay coil.
4. pick-up unit as claimed in claim 3 is characterized in that described pick-up unit also comprises alarm element, and described alarm element and described electricity leakage sensor printed circuit board (PCB) are electrically connected and provide the aging alerting signal of described electricity leakage sensor printed circuit board (PCB).
5. pick-up unit as claimed in claim 4 is characterized in that, described alarm element is that probe is connected with described electricity leakage sensor printed circuit board (PCB).
6. pick-up unit as claimed in claim 1, it is characterized in that, described debugging resistance circuit comprises a plurality of pull-up resistor and multi-gear switchs with different resistance values, described multi-gear switch is arranged between described switching device and the described a plurality of pull-up resistor, described a plurality of pull-up resistor one end is connected with the different switch terminal of described multi-gear switch respectively, and the other end is connected with described electricity leakage sensor printed circuit board (PCB) respectively.
7. pick-up unit as claimed in claim 6, it is characterized in that, described pick-up unit also comprises voltage display circuit, described voltage display circuit comprises DC voltage gauge outfit and multi-gear switch, the corresponding electrical connection of each test point of the difference input switch terminal of described multi-gear switch and described electricity leakage sensor printed circuit board (PCB), the output terminal of described multi-gear switch is connected with described DC voltage gauge outfit to show each test point voltage of described electricity leakage sensor printed circuit board (PCB) respectively.
8. pick-up unit as claimed in claim 7 is characterized in that, each input switch terminal of described multi-gear switch and each test point of electricity leakage sensor printed circuit board (PCB) are that probe is connected.
9. as any described pick-up unit among the claim 1-8, it is characterized in that, also comprise being connected with described electricity leakage sensor P.e.c. and provide ± power circuit of 15V direct supply.
10. pick-up unit as claimed in claim 9, it is characterized in that, described power circuit comprises Industrial Frequency Transformer, first and second commutation diode, first and second filter capacitor and first and second voltage stabilizer, be connected respectively to the electrode input end of described first commutation diode and the negative input of second commutation diode with exchanging 220 volts of described Industrial Frequency Transformers that are converted to interchange 15V, the negative pole of described first commutation diode is connected with described first filter capacitor and the positive pole of described second commutation diode is connected with described second filter capacitor, and described first voltage stabilizer is connected with the output terminal of described first filter capacitor and described second voltage stabilizer is connected with the output terminal of described second filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201095579U CN201242586Y (en) | 2008-07-31 | 2008-07-31 | Detection device for electrical leakage sensor printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201095579U CN201242586Y (en) | 2008-07-31 | 2008-07-31 | Detection device for electrical leakage sensor printed circuit board |
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| CN201242586Y true CN201242586Y (en) | 2009-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201095579U Expired - Lifetime CN201242586Y (en) | 2008-07-31 | 2008-07-31 | Detection device for electrical leakage sensor printed circuit board |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515296A (en) * | 2014-11-27 | 2015-04-15 | 国家电网公司 | Electric heater having electric leakage detection function |
| CN107543574A (en) * | 2017-06-01 | 2018-01-05 | 中国航发湖南动力机械研究所 | Airborne sensor high temperature aging tests automatic tester and operating method |
| CN109633407A (en) * | 2018-12-04 | 2019-04-16 | 上海无线电设备研究所 | A kind of the resistor intelligent adjustment method and its debugging system of radar circuit plate |
| CN117110963A (en) * | 2023-08-02 | 2023-11-24 | 湖北瑞磁科技有限公司 | Circuit board for automatically testing leakage protection sensor |
-
2008
- 2008-07-31 CN CNU2008201095579U patent/CN201242586Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515296A (en) * | 2014-11-27 | 2015-04-15 | 国家电网公司 | Electric heater having electric leakage detection function |
| CN107543574A (en) * | 2017-06-01 | 2018-01-05 | 中国航发湖南动力机械研究所 | Airborne sensor high temperature aging tests automatic tester and operating method |
| CN107543574B (en) * | 2017-06-01 | 2019-12-06 | 中国航发湖南动力机械研究所 | Automatic detector for high-temperature aging test of airborne sensor and operation method |
| CN109633407A (en) * | 2018-12-04 | 2019-04-16 | 上海无线电设备研究所 | A kind of the resistor intelligent adjustment method and its debugging system of radar circuit plate |
| CN117110963A (en) * | 2023-08-02 | 2023-11-24 | 湖北瑞磁科技有限公司 | Circuit board for automatically testing leakage protection sensor |
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Granted publication date: 20090520 |
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| CX01 | Expiry of patent term |