CN218240205U - External voltage signal measuring circuit and device - Google Patents
External voltage signal measuring circuit and device Download PDFInfo
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- CN218240205U CN218240205U CN202222434560.0U CN202222434560U CN218240205U CN 218240205 U CN218240205 U CN 218240205U CN 202222434560 U CN202222434560 U CN 202222434560U CN 218240205 U CN218240205 U CN 218240205U
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Abstract
The utility model discloses an external voltage signal measuring circuit and device, wherein, external voltage signal measuring circuit includes: the power distribution board testing device comprises a connecting piece, a voltage acquisition unit, a processor, a communication unit and an interface expansion unit, wherein the connecting piece is used for connecting a three-phase power transmission interface of a tested power distribution board; implement the utility model discloses also can gather the three-phase voltage signal who is surveyed the distribution board output under the condition in the voltage transformer cabinet secondary cabin of the distribution board of need not to open, make the mode that various electrical property check out test set can cut directly insert, not only saved loaded down with trivial details wiring process, can also reduce risks such as short circuit, personnel's electric shock between the lines, increase the connection reliability, effectively improve efficiency of software testing.
Description
Technical Field
The utility model relates to a distribution system electrical volume measures technical field, especially relates to an external voltage signal measuring circuit and device.
Background
In a nuclear power plant, it is necessary to periodically measure the voltage signal of the power distribution system and perform nuclear equalization to determine the operating condition of the power distribution system. And the voltage signal comes from the secondary compartment of the voltage transformer cabinet of the medium voltage switchboard. In the correlation technique, still need the secondary cabin of voltage transformer cabinet when gathering this voltage signal after, use tools such as test wire, joint, universal meter to connect the line at the scene, just can gather these voltage signals, and adopt this kind of mode to have certain equipment or personnel to electrocute the risk after opening the secondary cabin to the wiring process is loaded down with trivial details, not only needs huge work, still causes the people because of the error easily, if voltage transformer takes place the short circuit trouble, can lead to the unit to shut down the trouble even, seriously endangers nuclear power plant's economic benefits.
In addition, in the first power transmission and operation stage of the medium voltage distribution board, operations such as voltage measurement and nuclear phase operation need to be performed in the secondary cabin of the voltage transformer cabinet.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to at least one defect that prior art exists, provide an external voltage signal measuring circuit and device.
The utility model provides a technical scheme that its technical problem adopted is: an external voltage signal measuring circuit is constructed, comprising:
the input end of the connecting piece is used for connecting a three-phase power transmission interface of the distribution board to be tested;
the acquisition end of the voltage acquisition unit is connected with the output end of the connecting piece so as to acquire a voltage signal of the three-phase power transmission interface;
the analog quantity input end of the processor is connected with the output end of the voltage acquisition unit so as to output voltage data according to the voltage signal;
the input end of the communication unit is connected with the output end of the processor, and the output end of the communication unit can be connected with an upper computer and is used for sending the voltage data to the upper computer;
and the input end of the interface extension unit is connected with the output end of the connecting piece, and the output end of the interface extension unit can be connected with electrical property detection equipment.
Preferably, the external voltage signal measuring circuit further comprises a display unit; and the input end of the display unit is connected with the display instruction output end of the processor.
Preferably, the external voltage signal measuring circuit further comprises a power supply unit for supplying power to the voltage acquisition unit, the processor, the display unit and the communication unit.
Preferably, the power supply unit includes a dc source and a voltage conversion circuit for converting an output voltage of the dc source into a set dc voltage; the direct current source is connected with the voltage conversion circuit, and the output end of the voltage conversion circuit is connected with the voltage acquisition unit, the processor, the display unit and the communication unit.
Preferably, the voltage conversion circuit comprises a linear voltage regulator U2 and an output capacitor C1;
the input end of the linear voltage stabilizer U2 is connected with the positive electrode of the direct current source, the output end of the linear voltage stabilizer U2 serves as the output end of the voltage conversion circuit to be connected with the voltage acquisition unit, the processor, the display unit and the communication unit, and the output end of the linear voltage stabilizer U2 is connected to the ground through the output capacitor C1.
Preferably, the interface extension unit comprises an A phase extension loop, a B phase extension loop and a C phase extension loop;
the A phase expansion loop comprises a first input terminal J1 and a first output terminal P1; the first input terminal J1 is connected to the first output terminal P1;
the B-phase expansion loop comprises a second input terminal J2 and a second output terminal P2; the second input terminal J2 is connected to the second output terminal P2;
the C-phase expansion loop comprises a third input terminal J3 and a third output terminal P3; the third input terminal J3 is connected to the third output terminal P3.
Preferably, each of the interface extension units further comprises a first voltmeter V1, a second voltmeter V2, and a third voltmeter V3;
a first collecting end of the first voltmeter V1 is connected to the first input terminal J1, and a second collecting end of the first voltmeter V1 is connected to the second input terminal J2; a first collecting end of the second voltmeter V2 is connected to the second input terminal J2, and a second collecting end of the second voltmeter V2 is connected to the third input terminal J3; the first collecting end of the third voltmeter V3 is connected to the third input terminal J3, and the second collecting end of the third voltmeter V3 is connected to the first input terminal J1.
Preferably, the communication unit includes a wireless communication module.
Preferably, the model of the wireless communication module is SIM7600CE.
The utility model discloses an external voltage signal measuring device has still been constructed, include the embodiment of the utility model provides an external voltage signal measuring circuit.
The utility model discloses following beneficial effect has at least: the connecting piece is connected with the three-phase power transmission interface of the distribution board to be tested, so that three-phase voltage signals output by the distribution board to be tested can be acquired under the condition that a secondary cabin of a voltage transformer cabinet of the distribution board to be tested does not need to be opened; the processor is used for carrying out digital processing on the three-phase voltage signals acquired by the voltage acquisition unit in real time so as to acquire characteristic data of each phase voltage signal, and the communication unit and the upper computer are used for realizing information interaction, so that a tester can conveniently and quickly control the external voltage signal measurement circuit; various electrical property detection devices can be accessed in a direct-insertion mode by additionally arranging an interface extension unit; it can be understood, the utility model discloses an utilize the mode of connecting piece and cut straightly socket to be connected with external equipment, not only saved loaded down with trivial details wiring process, can also reduce risks such as line-to-line short circuit, personnel's electric shock, increase and connect the reliability, further, implement the utility model discloses can also make the tester independently accomplish test work, effectively improve efficiency of software testing.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a structural diagram of an embodiment of an external voltage signal measuring circuit provided by the present invention;
fig. 2 is a structural diagram of an interface extension unit in the external voltage signal measurement circuit provided by the present invention;
fig. 3 is a second structure diagram of the external voltage signal measuring circuit according to the present invention;
fig. 4 is a circuit diagram of a power supply unit in the external voltage signal measuring circuit provided by the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the utility model provides an external voltage signal measuring circuit, including connecting piece 1, voltage acquisition unit 2, treater 3, communication unit 4 and interface extension unit 5.
The input end of the connecting piece 1 is used for connecting a three-phase power transmission interface of the distribution board to be tested. Furthermore, the connecting piece 1 is a plug matched with the three-phase power transmission interface, so that when measurement is carried out, a three-phase voltage signal output by the distribution board to be measured can be acquired under the condition that a secondary cabin of a voltage transformer cabinet of the distribution board to be measured is not required to be opened; in some embodiments, some plugs have a sealed structure, so that the connection with the voltage acquisition unit 2 is obstructed, and therefore the plugs need to be modified, such as removing the middle insulating strikers of the three-phase interfaces of some plugs, in order to acquire three-phase voltage signals.
And the acquisition end of the voltage acquisition unit 2 is connected with the output end of the connecting piece 1 to acquire a voltage signal of the three-phase power transmission interface. Further, in some embodiments, the voltage acquisition unit 2 may be a voltage acquisition module consisting of a voltage transformer of the model ZMPT101B, which can acquire a three-phase voltage signal in real time.
And the analog quantity input end of the processor 3 is connected with the output end of the voltage acquisition unit 2 so as to output voltage data according to the voltage signal. Further, in some embodiments, the processor 3 includes a master control chip U1, where the model of the master control chip U1 may be STM32H743VIT6; a plurality of ADC ports in the main control chip U1 are used as analog quantity input ends of the processor 3 to be connected with the output end of the voltage acquisition module so as to acquire three-phase voltage signals in real time. The main control chip U1 carries out digital processing on the three-phase voltage signals to obtain voltage data; or calculating the characteristic data of each phase voltage signal as voltage data; in addition, the characteristic data includes a voltage waveform curve, frequency, amplitude, phase, abrupt fluctuation, and the like of each phase voltage signal.
The input end of the communication unit 4 is connected with the output end of the processor 3, and the output end of the communication unit 4 can be connected with an upper computer and used for sending voltage data to the upper computer.
In some examples, the input end of the communication unit 4 is connected to a communication port (including but not limited to a USB interface, a serial port, an I2C interface, etc.) of the main control chip U1, and further performs information interaction with the main control chip U1, so that the processor 3 can obtain a control instruction from an upper computer through the communication unit 4, for example, send some data in the feature data to the upper computer, feed back the running status of itself, and the like. In addition, the upper computer can be a terminal with a special application program, such as a mobile phone, a computer and the like.
In some embodiments, the communication unit 4 comprises a wireless communication module. Further, the model of the wireless communication module may be SIM7600CE, and based on SIM7600CE, the processor 3 and the upper computer may be configured by configuring corresponding wires and peripheral circuits in the prior art to realize information interaction. It is understood that the communication unit 4 may also be a bluetooth communication module, an internet access communication module, etc.
The input end of the interface extension unit 5 is connected with the output end of the connecting piece 1, and the output end of the interface extension unit 5 can be connected with an electrical property detection device. The electrical property detection equipment comprises a multimeter, a wave recorder, a phase sequence meter and other measurement equipment.
In some embodiments, as shown in fig. 2, the interface expansion unit 5 includes an a-phase expansion loop 51, a B-phase expansion loop 52, and a C-phase expansion loop 53. Specifically, the a-phase expanding circuit 51 includes a first input terminal J1 and a first output terminal P1; the first input terminal J1 is connected to the first output terminal P1; the B-phase expanding loop 52 includes a second input terminal J2 and a second output terminal P2; the second input terminal J2 is connected to the second output terminal P2; the C-phase expanded loop 53 includes a third input terminal J3 and a third output terminal P3; the third input terminal J3 is connected to the third output terminal P3.
Further, each of the input terminals and the output terminals may be a socket adapted to a collecting plug of each of the electrical property testing apparatuses, such as a banana socket of various sizes. It can be understood that, the interface extension unit 5 can be used to enable the devices to be accessed in a direct-plug manner, which effectively improves the convenience and reliability of access.
In some embodiments, as shown in fig. 2, each interface expansion unit 5 further includes a first voltmeter V1, a second voltmeter V2, and a third voltmeter V3. Specifically, a first collecting end of the first voltmeter V1 is connected to the first input terminal J1, and a second collecting end of the first voltmeter V1 is connected to the second input terminal J2; a first acquisition end of the second voltmeter V2 is connected to the second input terminal J2, and a second acquisition end of the second voltmeter V2 is connected to the third input terminal J3; the first collecting end of the third voltmeter V3 is connected to the third input terminal J3, and the second collecting end of the third voltmeter V3 is connected to the first input terminal J1. Each voltmeter is used for measuring and displaying the effective voltage value of each phase line.
In some embodiments, as shown in fig. 3, the external voltage signal measuring circuit further includes a display unit 6; specifically, the input end of the display unit 6 is connected with the display instruction output end of the processor 3 to perform display work according to the display instruction; including display characteristic data, the amount of power from the dc source 71, etc. Optionally, the display unit 6 is a multi-digit nixie tube.
In some embodiments, as shown in fig. 3, the external voltage signal measuring circuit further includes a power supply unit 7 for supplying power to the voltage collecting unit 2, the processor 3, the display unit 6 and the communication unit 4.
In some embodiments, as shown in fig. 4, the power supply unit 7 includes a direct current source 71 and a voltage conversion circuit 72 for converting an output voltage of the direct current source 71 into a set direct current voltage; the set dc voltage may be 3.3V. Specifically, the direct current source 71 is connected to the voltage conversion circuit 72, and an output end of the voltage conversion circuit 72 is connected to the voltage acquisition unit 2, the processor 3, the display unit 6 and the communication unit 4.
In some embodiments, the dc source 71 may be a lithium battery BT1 to increase the portability of the external voltage signal measuring circuit.
In some embodiments, as shown in fig. 4, voltage conversion circuit 72 includes a linear regulator U2 and an output capacitor C1; the linear regulator U2 signal may be AMS1117-3.3V, among others. Specifically, the input end of the linear regulator U2 is connected to the positive electrode of the dc source 71, the output end of the linear regulator U2 is connected to the voltage acquisition unit 2, the processor 3, the display unit 6 and the communication unit 4 as the output end of the voltage conversion circuit 72, and the output end of the linear regulator U2 is further connected to the ground through the output capacitor C1. It will be appreciated that the voltage conversion circuit 72 may also be a switching power supply circuit as is commonly used in the art.
In some embodiments, as shown in fig. 4, the power supply unit 7 further includes a second resistor R2 and a third resistor R3. Specifically, a first end of the second resistor R2 is connected to the anode of the lithium battery BT1, a second end of the second resistor R2 is connected to the cathode of the lithium battery BT1 through the third resistor R3, and a second end of the second resistor R2 is connected to the processor 3 as a battery voltage sampling end, so that the processor 3 can calculate the output voltage of the lithium battery BT11 according to the sampling voltage, and further calculate the electric quantity of the lithium battery BT 1.
The utility model also provides an external voltage signal measuring device, include the embodiment of the utility model provides an external voltage signal measuring circuit.
The utility model discloses following beneficial effect has at least: the three-phase power transmission interface of the distribution board to be tested is connected through the connecting piece, so that three-phase voltage signals output by the distribution board to be tested can be acquired under the condition that a secondary cabin of a voltage transformer cabinet of the distribution board to be tested is not required to be opened; the processor is used for carrying out digital processing on the three-phase voltage signals acquired by the voltage acquisition unit in real time so as to acquire characteristic data of each phase voltage signal, and the communication unit and the upper computer are used for realizing information interaction, so that a tester can conveniently and quickly control the external voltage signal measurement circuit; various electrical property detection devices can be accessed in a direct-insertion mode by additionally arranging an interface extension unit; it can be understood, the utility model discloses an utilize the mode of connecting piece and cut straightly socket to be connected with external equipment, not only saved loaded down with trivial details wiring process, can also reduce risks such as line short circuit, personnel's electric shock, increase and connect the reliability, furtherly, implement the utility model discloses can also make the tester independently accomplish test work, effectively improve efficiency of software testing.
It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. An external voltage signal measuring circuit, comprising:
the input end of the connecting piece (1) is used for connecting a three-phase power transmission interface of the distribution board to be tested;
the acquisition end of the voltage acquisition unit (2) is connected with the output end of the connecting piece (1) to acquire a voltage signal of the three-phase power transmission interface;
the analog quantity input end of the processor (3) is connected with the output end of the voltage acquisition unit (2) so as to output voltage data according to the voltage signal;
the input end of the communication unit (4) is connected with the output end of the processor (3), and the output end of the communication unit can be connected with an upper computer and used for sending the voltage data to the upper computer;
and the input end of the interface extension unit (5) is connected with the output end of the connecting piece (1), and the output end of the interface extension unit can be connected with electrical property detection equipment.
2. The external voltage signal measurement circuit according to claim 1, further comprising a display unit (6); the input end of the display unit (6) is connected with the display instruction output end of the processor (3).
3. An external voltage signal measuring circuit according to claim 2, further comprising a power supply unit (7) for supplying power to the voltage acquisition unit (2), the processor (3), the display unit (6) and the communication unit (4).
4. An external voltage signal measuring circuit according to claim 3, characterized in that the power supply unit (7) comprises a direct current source (71) and a voltage converting circuit (72) for converting an output voltage of the direct current source (71) into a set direct current voltage; the direct current source (71) is connected with the voltage conversion circuit (72), and the output end of the voltage conversion circuit (72) is connected with the voltage acquisition unit (2), the processor (3), the display unit (6) and the communication unit (4).
5. An external voltage signal measurement circuit according to claim 4, wherein the voltage conversion circuit (72) comprises a linear regulator U2 and an output capacitor C1;
the input of linear regulator U2 is connected the anodal of direct current source (71) is connected, linear regulator U2's output is as voltage conversion circuit (72)'s output is connected voltage acquisition unit (2), treater (3), display element (6) and communication unit (4), linear regulator U2's output still warp output capacitor C1 is connected to ground.
6. The external voltage signal measurement circuit according to claim 1, wherein the interface expansion unit (5) comprises an a-phase expansion loop (51), a B-phase expansion loop (52) and a C-phase expansion loop (53);
the A phase expansion loop (51) comprises a first input terminal J1 and a first output terminal P1; the first input terminal J1 is connected to the first output terminal P1;
the B-phase expansion loop (52) comprises a second input terminal J2 and a second output terminal P2; the second input terminal J2 is connected to the second output terminal P2;
the C phase expansion loop (53) comprises a third input terminal J3 and a third output terminal P3; the third input terminal J3 is connected to the third output terminal P3.
7. An external voltage signal measuring circuit according to claim 6, wherein each of the interface extension units (5) further comprises a first voltmeter V1, a second voltmeter V2, and a third voltmeter V3;
a first collecting end of the first voltmeter V1 is connected to the first input terminal J1, and a second collecting end of the first voltmeter V1 is connected to the second input terminal J2; a first collecting end of the second voltmeter V2 is connected to the second input terminal J2, and a second collecting end of the second voltmeter V2 is connected to the third input terminal J3; the first collecting end of the third voltmeter V3 is connected to the third input terminal J3, and the second collecting end of the third voltmeter V3 is connected to the first input terminal J1.
8. An external voltage signal measuring circuit according to claim 1, wherein the communication unit (4) comprises a wireless communication module.
9. The external voltage signal measuring circuit according to claim 8, wherein the wireless communication module is SIM7600CE.
10. An external voltage signal measuring device, comprising the external voltage signal measuring circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222434560.0U CN218240205U (en) | 2022-09-14 | 2022-09-14 | External voltage signal measuring circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222434560.0U CN218240205U (en) | 2022-09-14 | 2022-09-14 | External voltage signal measuring circuit and device |
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| Publication Number | Publication Date |
|---|---|
| CN218240205U true CN218240205U (en) | 2023-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222434560.0U Active CN218240205U (en) | 2022-09-14 | 2022-09-14 | External voltage signal measuring circuit and device |
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|---|---|
| CN (1) | CN218240205U (en) |
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- 2022-09-14 CN CN202222434560.0U patent/CN218240205U/en active Active
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