CN112798934A - A circuit board detection circuit - Google Patents
A circuit board detection circuit Download PDFInfo
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- CN112798934A CN112798934A CN202110138492.0A CN202110138492A CN112798934A CN 112798934 A CN112798934 A CN 112798934A CN 202110138492 A CN202110138492 A CN 202110138492A CN 112798934 A CN112798934 A CN 112798934A
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- circuit
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- circuit board
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
本发明提供的线路板的一种线路板的检测电路，包括：控制电路、采样电路及脱扣电路，其中，脱扣电路与待测线路板的负载端连接；控制电路的一端与外部信号发送装置连接，另一端与采样电路的一端连接，用于采集外部信号发送装置发送的漏电信号，并将漏电信号发送至采样电路；采样电路的另一端与待测线路板的输入端连接，用于根据漏电信号生成脱扣信号，控制与待测线路板连接的脱扣电路进行脱扣。通过实施本发明，解决了目前线路板在装进断路器前无法进行性能测试的问题。
A circuit board detection circuit of a circuit board provided by the present invention includes: a control circuit, a sampling circuit and a trip circuit, wherein the trip circuit is connected to the load end of the circuit board to be tested; one end of the control circuit is connected to an external signal transmission The other end of the sampling circuit is connected to one end of the sampling circuit, which is used to collect the leakage signal sent by the external signal transmission device, and send the leakage signal to the sampling circuit; the other end of the sampling circuit is connected to the input end of the circuit board to be tested, and is used for The tripping signal is generated according to the leakage signal, and the tripping circuit connected with the circuit board to be tested is controlled to trip. By implementing the present invention, the problem that the current circuit board cannot be tested for performance before being installed in the circuit breaker is solved.
Description
Technical Field
The invention relates to the field of circuit breaker detection, in particular to a circuit board detection circuit.
Background
The circuit breaker is used as equipment for protecting the safety of lives and properties of people in a power distribution system, and can quickly cut off a power supply when the danger of electric leakage occurs, so that people can safely use electricity, and unnecessary loss is avoided. Therefore, in order to improve the operation reliability of the circuit breaker and guarantee the life and property safety of a user, performance test is required before the circuit breaker is delivered from a factory.
However, the existing detection method for the electronic circuit breaker with the circuit board is only to electrify the circuit board and measure the voltage of the test point of the circuit board, and cannot test the characteristics of action, time and the like before the circuit board is installed in the circuit breaker, so that the test is incomplete, when the action characteristics of the product cannot meet the factory requirements, the circuit board can only be detached and replaced, and the fault reason cannot be judged. Therefore, how to realize the performance detection of the electronic circuit breaker connection circuit board is an urgent problem to be solved.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the performance test cannot be carried out before the circuit board is installed in the circuit breaker in the prior art, thereby providing a circuit board detection circuit.
In order to achieve the purpose, the invention provides the following technical scheme:
the embodiment of the invention provides a detection circuit of a circuit board, wherein the circuit board is applied to an electronic circuit breaker, and the detection circuit comprises: the device comprises a control circuit, a sampling circuit and a tripping circuit, wherein the tripping circuit is connected with a load end of a circuit board to be tested; one end of the control circuit is connected with an external signal sending device, and the other end of the control circuit is connected with one end of the sampling circuit and is used for collecting a leakage signal sent by the external signal sending device and sending the leakage signal to the sampling circuit; the other end of the sampling circuit is connected with the input end of the circuit board to be tested and is used for generating a tripping signal according to the leakage signal and controlling the tripping circuit connected with the circuit board to be tested to trip.
Optionally, the trip circuit comprises: and a first relay coil corresponding to the first relay is connected to the load end of the circuit board to be tested.
Optionally, the control circuit includes: the relay circuit comprises four relays; one end of each relay coil in the relay loop is connected with the first output end of the signal sending device through a first normally closed switch corresponding to the first relay, and the other end of each relay coil in the relay loop is connected with the fourth output end of the signal sending device through a first normally open switch corresponding to the second relay in the relay loop; each output end of the signal sending device is connected with the input end of the sampling circuit through a second normally open switch corresponding to each relay in the relay loop; the starting switch is connected in parallel with a first normally open switch corresponding to the second relay.
Optionally, the start switch is a jog switch.
Optionally, the control circuit further includes: and one end of the emergency stop switch is connected with the other end of the starting switch, and the other end of the emergency stop switch is connected with the fourth end of the signal sending device.
Optionally, the emergency stop switch is a self-locking switch.
Optionally, the sampling circuit comprises a current transformer.
Optionally, the detection circuit further comprises: the current transformer comprises a first indicator light, a second indicator light and a third indicator light, wherein one end of the first indicator light is connected with a first output end of the current transformer, and the other end of the first indicator light is connected with a fourth output end of the current transformer; one end of the second indicator light is connected with the second output end of the current transformer, and the other end of the second indicator light is connected with the fourth output end of the current transformer; one end of the third indicator light is connected with the third output end of the current transformer, and the other end of the third indicator light is connected with the fourth output end of the current transformer.
The technical scheme of the invention has the following advantages:
the invention provides a detection circuit of a circuit board, comprising: the device comprises a control circuit, a sampling circuit and a tripping circuit, wherein the tripping circuit is connected with a load end of a circuit board to be tested; one end of the control circuit is connected with the external signal sending device, and the other end of the control circuit is connected with one end of the sampling circuit and used for collecting a leakage signal sent by the external signal sending device and sending the leakage signal to the sampling circuit; the other end of the sampling circuit is connected with the input end of the circuit board to be tested and used for generating a tripping signal according to the leakage signal and controlling a tripping circuit connected with the circuit board to be tested to trip. Through in will await measuring the circuit board inserts detection circuitry, utilize detection circuitry to replace circuit breaker mechanism, the divide-shut brake of equivalent simulation circuit breaker realizes the test of electronic type circuit breaker circuit board characteristic, has solved present circuit board and can't carry out the problem of capability test before putting into the circuit breaker.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic block diagram of a specific example of a detection circuit of a circuit board in an embodiment of the present invention;
fig. 2 is a diagram of a trip circuit in an embodiment of the invention;
FIG. 3 is a circuit diagram of a circuit board for testing in an embodiment of the present invention;
fig. 4 is a circuit diagram of an indicator lamp mounting circuit in an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment of the invention provides a detection circuit of a circuit board, which is used for realizing performance test of the circuit board in an electronic circuit breaker. As shown in fig. 1, the detection circuit includes: the device comprises a control circuit 1, a sampling circuit 2 and a tripping circuit 3, wherein the tripping circuit 3 is connected with a load end of a circuit board to be tested; one end of the control circuit 1 is connected with an external signal sending device, and the other end of the control circuit is connected with one end of the sampling circuit 2, and the control circuit is used for collecting a leakage signal sent by the external signal sending device and sending the leakage signal to the sampling circuit 2; the other end of the sampling circuit 2 is connected with the input end of the circuit board to be tested and is used for generating a tripping signal according to the leakage signal and controlling a tripping circuit 3 connected with the circuit board to be tested to trip.
In a specific embodiment, when performing a performance test on a circuit board to be tested, an input end of the circuit board to be tested is first connected to a sampling circuit 2 in a detection circuit, a load end (i.e., a leakage signal output end) is connected to a trip circuit 3 in the detection circuit, and the performance test on the circuit board to be tested is completed by using the detection circuit. Specifically, after the control circuit 1 collects the leakage signal sent by the external signal sending device, the leakage signal is sent to the sampling circuit 2, the sampling circuit 2 generates a trip signal according to the leakage signal, and the trip circuit 3 connected with the leakage signal output end of the circuit board to be tested is controlled to trip. Meanwhile, the detection circuit can also return a tripping signal to the external signal sending device, and a test result of the circuit board to be tested is displayed through a display screen of the external signal sending device. And if the test result shows that the tripping circuit 3 can be normally tripped, judging that the circuit board to be tested is qualified, and if the test result shows that the tripping circuit 3 cannot be normally tripped, judging that the circuit board to be tested is unqualified, and maintaining the fault that the circuit board to be tested cannot be tripped or removing the circuit board to be tested from the circuit board required by the installation of the circuit breaker. In the embodiment of the present invention, the sampling circuit 2 includes a current transformer, and the current transformer is used to generate a trip signal.
The invention provides a detection circuit of a circuit board, comprising: the device comprises a control circuit, a sampling circuit and a tripping circuit, wherein the tripping circuit is connected with a load end of a circuit board to be tested; one end of the control circuit is connected with the external signal sending device, and the other end of the control circuit is connected with one end of the sampling circuit and used for collecting a leakage signal sent by the external signal sending device and sending the leakage signal to the sampling circuit; the other end of the sampling circuit is connected with the input end of the circuit board to be tested and used for generating a tripping signal according to the leakage signal and controlling a tripping circuit connected with the circuit board to be tested to trip. Through in will await measuring the circuit board inserts detection circuitry, utilize detection circuitry to replace circuit breaker mechanism, the divide-shut brake of equivalent simulation circuit breaker realizes the test of electronic type circuit breaker circuit board characteristic, has solved present circuit board and can't carry out the problem of capability test before putting into the circuit breaker.
In one embodiment, the trip circuit 3 includes: and a first relay coil corresponding to the first relay KJ1 and the first relay coil corresponding to the first relay KJ1 is connected to the load end of the circuit board to be tested.
In a specific embodiment, since the performance of the circuit board to be tested needs to be tested before the circuit board to be tested is installed in the circuit breaker, and at this time, due to the absence of the driving mechanism of the trip circuit 3, the trip operation cannot be completed after the control circuit 1 detects the leakage signal. Therefore, as shown in fig. 2, in the detection circuit, the trip operation is completed by the coil of the first relay KJ1 instead of the trip coil.
In one embodiment, as shown in fig. 3, the control circuit 1 includes: a relay loop 11 and a starting switch 12, wherein the relay loop 11 comprises four relays; one end of each relay coil in the relay loop 11 is connected with the first output end of the signal sending device through a first normally closed switch corresponding to the first relay KJ1, and the other end of each relay coil in the relay loop 11 is connected with the fourth output end of the signal sending device through a first normally open switch corresponding to the second relay KJ2 in the relay loop 11; each output end of the signal sending device is connected with the input end of the sampling circuit 2 through a second normally open switch corresponding to each relay in the relay loop 11; the starting switch 12 is connected in parallel with a first normally open switch corresponding to the second relay KJ 2.
In one embodiment, the start switch 12 is a jog switch. That is, when the start switch 12 is pressed, the relay circuit 11 is turned on, and when the hand is released, the start switch 12 rebounds, and the relay circuit 11 is opened. In order to prevent the starting switch 12 from rebounding after the starting switch 12 is released, which results in the power loss of the relay loop 11, in the embodiment of the present invention, a first normally open switch corresponding to the second relay KJ2 is connected in parallel at the starting switch 12, which provides a self-locking loop for the starting switch 12.
In the embodiment of the present invention, as shown in fig. 3, the control circuit 1 further includes: and one end of the emergency stop switch 13 is connected with the other end of the starting switch 12, and the other end of the emergency stop switch 13 is connected with the fourth end of the signal sending device. Specifically, the emergency stop switch 13 is a self-locking switch, the emergency stop switch 13 is in a normally closed state, and when an emergency occurs, the detection circuit can be cut off by turning off the emergency stop switch 13. When the detection circuit returns to normal, the emergency stop switch 13 can be manually closed, and the emergency stop switch 13 is a self-locking switch, so that the emergency stop switch 13 is continuously turned on after being pressed.
In the embodiment of the invention, as shown in fig. 3, the relay circuit 11 includes a second relay KJ2, a third relay KJ3, a fourth relay KJ4, and a fifth relay KJ 5. One end of second relay KJ2, the one end of third relay KJ3, the one end of fourth relay KJ4 and the one end of fifth relay KJ5 are connected with the first output of signal transmission device through the first normally closed switch that first relay KJ1 corresponds respectively, the other end of second relay KJ2, the other end of third relay KJ3, the other end of fourth relay KJ4 and the other end of fifth relay KJ5 are connected with the fourth output of signal transmission device through the first normally open switch that second relay KJ2 corresponds in relay return circuit 11 respectively. A first output end L1 of the signal sending device is connected with a first input end of the sampling circuit 2 through a second normally open switch corresponding to a second relay KJ2 in the relay loop 11; a second output end L2 of the signal sending device is connected with a second input end of the sampling circuit 2 through a first normally open switch and a second normally open switch corresponding to a third relay KJ3 in the relay loop 11; a third output end L3 of the signal sending device is connected with a third input end of the sampling circuit 2 through a first normally open switch and a second normally open switch corresponding to a fourth relay KJ4 in the relay loop 11; and a fourth output end N of the signal sending device is connected with a fourth input end of the sampling circuit 2 through a first normally open switch and a second normally open switch corresponding to a fifth relay KJ5 in the relay loop 11. In the embodiment of the present invention, the second relay KJ2, the third relay KJ3, the fourth relay KJ4, and the fifth relay KJ5 are all two-pole relays, which is only taken as an example and not limited thereto.
Specifically, when carrying out performance test to the circuit board that awaits measuring, at first closed starting switch 12, relay return circuit 11 switches on in the twinkling of an eye, and second relay KJ2, third relay KJ3, fourth relay KJ4 and fifth relay KJ5 get electric, and the first normally open switch that second relay KJ2 corresponds is closed, provides the auto-lock return circuit for starting switch 12 for relay return circuit 11 keeps the on-state. Because second relay KJ2, third relay KJ3, fourth relay KJ4 and fifth relay KJ5 get electric, the second that second relay KJ2 corresponds normally opens the switch, first normally open switch and the second that third relay KJ3 corresponds normally open the switch, first normally open switch and the second that fourth relay KJ4 corresponds normally open the switch, first normally open switch and the second that fifth relay KJ5 corresponds normally open the switch and all are closed, detection circuitry switches on so far, can carry out performance test to the circuit board that awaits measuring.
Further, after the external signal sending device inputs a leakage signal to the current transformer through the normally open switches (the normally open switches are closed at this time) corresponding to the relays in the relay loop 11, the current transformer generates a trip signal according to the leakage signal, and controls the first relay KJ1 connected with the circuit board to be tested to lose power. Because first relay KJ1 loses the electricity, its first normally closed switch disconnection that corresponds, and then lead to relay return circuit 11 disconnection for the normally open switch that each relay corresponds in the relay return circuit 11 also becomes the off-state by the on-state, and so far, whole detection and detection circuit realizes the dropout, has accomplished the capability test to the circuit board that awaits measuring. In the embodiment of the invention, according to an equivalent principle, a circuit breaker mechanism is equivalently replaced by the first relay KJ1, the second relay KJ2, the third relay KJ3, the fourth relay KJ4 and the fifth relay KJ5, and a detection circuit formed by the relays is used for equivalently simulating the opening and closing of the circuit breaker, so that the test of the characteristics of the circuit board of the electronic circuit breaker is realized.
In one embodiment, as shown in fig. 4, the detection circuit further includes: the current transformer comprises a first indicator light LED1, a second indicator light LED2 and a third indicator light LED3, wherein one end of the first indicator light LED1 is connected with a first output end A of the current transformer, and the other end of the first indicator light LED1 is connected with a fourth output end N' of the current transformer; one end of the second indicator light LED2 is connected with the second output end B of the current transformer, and the other end is connected with the fourth output end N' of the current transformer; one end of the third indicator light LED3 is connected with the third output end C of the current transformer, and the other end is connected with the fourth output end N' of the current transformer.
In a specific embodiment, by arranging the indicator lamps on each phase of the current transformer, whether current exists on each phase of the current transformer can be judged through the on-off of the indicator lamps in the test process, and whether a leakage signal sent by the external signal sending device is normal is further judged through the on-off of the indicator lamps.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138492.0A CN112798934B (en) | 2021-02-01 | 2021-02-01 | A detection circuit for a circuit board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138492.0A CN112798934B (en) | 2021-02-01 | 2021-02-01 | A detection circuit for a circuit board |
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| CN112798934A true CN112798934A (en) | 2021-05-14 |
| CN112798934B CN112798934B (en) | 2025-09-02 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204012652U (en) * | 2014-08-11 | 2014-12-10 | 施耐德电气（中国）有限公司 | A kind of earth leakage protective device based on relay |
| CN204577386U (en) * | 2015-05-19 | 2015-08-19 | 民普电气有限公司 | A kind of circuit board of plastic casing formula earth leakage circuit breaker |
| CN205389098U (en) * | 2016-01-04 | 2016-07-20 | 浙江正泰电器股份有限公司 | Residual current operated circuit breaker circuit |
| KR20170123926A (en) * | 2016-04-29 | 2017-11-09 | 엘에스산전 주식회사 | Remote trip circuit for earth leakage circuit breaker |
| CN206834145U (en) * | 2017-06-29 | 2018-01-02 | 首瑞（天津）电气设备有限公司 | The controller of electronic type residual current circuit breaker |
| CN214409205U (en) * | 2021-02-01 | 2021-10-15 | 浙江人民电器有限公司 | Detection circuit of circuit board |
-
2021
- 2021-02-01 CN CN202110138492.0A patent/CN112798934B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204012652U (en) * | 2014-08-11 | 2014-12-10 | 施耐德电气（中国）有限公司 | A kind of earth leakage protective device based on relay |
| CN204577386U (en) * | 2015-05-19 | 2015-08-19 | 民普电气有限公司 | A kind of circuit board of plastic casing formula earth leakage circuit breaker |
| CN205389098U (en) * | 2016-01-04 | 2016-07-20 | 浙江正泰电器股份有限公司 | Residual current operated circuit breaker circuit |
| KR20170123926A (en) * | 2016-04-29 | 2017-11-09 | 엘에스산전 주식회사 | Remote trip circuit for earth leakage circuit breaker |
| CN206834145U (en) * | 2017-06-29 | 2018-01-02 | 首瑞（天津）电气设备有限公司 | The controller of electronic type residual current circuit breaker |
| CN214409205U (en) * | 2021-02-01 | 2021-10-15 | 浙江人民电器有限公司 | Detection circuit of circuit board |
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| CN112798934B (en) | 2025-09-02 |
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