CN214845495U - Grounding resistance on-line detector - Google Patents
Grounding resistance on-line detector Download PDFInfo
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- CN214845495U CN214845495U CN202120904795.4U CN202120904795U CN214845495U CN 214845495 U CN214845495 U CN 214845495U CN 202120904795 U CN202120904795 U CN 202120904795U CN 214845495 U CN214845495 U CN 214845495U
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Abstract
The utility model relates to an on-line detector for ground resistance, belonging to the technical field of electronic measurement; the on-line detector has high grounding resistance measurement precision and strong anti-interference factors; the technical scheme is as follows: ground resistance on-line measuring appearance includes: the control center module, the Hall voltage sensor, the Hall current sensor, the grounding electrode, the auxiliary voltage electrode, the auxiliary current electrode, the key module and the power supply; the control center module is electrically connected with the Hall voltage sensor, the Hall current sensor and the key module respectively, the grounding electrode is connected with one end of the power supply, the auxiliary voltage electrode and the auxiliary current electrode are both connected with the other end of the power supply, the Hall voltage sensor is arranged on the auxiliary voltage electrode and power supply connecting circuit, and the Hall current sensor is arranged on the auxiliary current electrode and power supply connecting circuit.
Description
Technical Field
The utility model discloses an earth resistance on-line detector belongs to the electron and measures technical field.
Background
The ground resistance is a resistance encountered by a current flowing from a ground device into the ground and then flowing through the ground to another ground body or spreading to a distant place. The value of the grounding resistance represents the degree of good contact of the electrical device with "ground" and reflects the size of the grounding grid.
At present, many ground resistance testers adopt hand formula generator work, and concrete current numerical value measures through current transformer, has the low, uses inconvenient problem of measuring accuracy.
Along with the technical development, novel ground resistance adopts the battery to supply power, nevertheless still has the current test precision low, especially under the unstable condition of voltage after the battery electric quantity reduces, the test precision has the interference great.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an online detector that ground resistance measurement accuracy is high, and the anti-interference factor is strong.
In order to achieve the technical purpose, the utility model provides a technical scheme does:
ground resistance on-line measuring appearance includes: the control center module, the Hall voltage sensor, the Hall current sensor, the grounding electrode, the auxiliary voltage electrode, the auxiliary current electrode, the key module and the power supply; the control center module is electrically connected with the Hall voltage sensor, the Hall current sensor and the key module respectively, the grounding electrode is connected with one end of the power supply, the auxiliary voltage electrode and the auxiliary current electrode are both connected with the other end of the power supply, the Hall voltage sensor is arranged on the auxiliary voltage electrode and power supply connecting circuit, and the Hall current sensor is arranged on the auxiliary current electrode and power supply connecting circuit.
The grounding resistance online detector also comprises an intermediate relay KA1, an intermediate relay KA2 and an intermediate relay KA 3;
the coil of the intermediate relay KA1 is KA1.1, and the contact of the intermediate relay KA1 is KA 1.2;
the coil of the intermediate relay KA2 is KA2.1, and the contact of the intermediate relay KA2 is KA 2.2;
the coil of the intermediate relay KA3 is KA3.1, and the contact of the intermediate relay KA3 is KA 3.2;
the intermediate relay contact KA1.2 is arranged on the circuit for connecting the grounding electrode with the power supply, the intermediate relay contact KA2.2 is arranged on the circuit for connecting the auxiliary voltage electrode with the power supply, and the intermediate relay contact KA3.2 is arranged on the circuit for connecting the auxiliary current electrode with the power supply;
and the intermediate relay coil KA1.1, the intermediate relay coil KA2.1 and the intermediate relay coil KA3.1 are respectively electrically connected with the control center module.
The grounding resistance on-line detector also comprises a shell; control center module, hall voltage sensor, hall current sensor, auxiliary relay KA1, auxiliary relay KA2 and auxiliary relay KA3 and power set up in the shell, be provided with the output interface of being connected with earthing pole, auxiliary voltage utmost point and auxiliary current utmost point on the shell.
The ground electrode is a wire connecting clamp, and the auxiliary voltage electrode and the auxiliary current electrode are stainless steel straight rods.
The power supply comprises a test power supply and a stabilized voltage power supply, wherein the test power supply is as follows: the input end of the inverter module is connected with the output end of the battery, the output end of the inverter module is connected with a transformer, and two ends of the transformer are two ends of a power supply;
the voltage-stabilized power supply is as follows: the input end of the direct current power supply module is connected with the battery, the output end of the direct current power supply module is connected with the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit supplies power for the control center module.
The ground resistance on-line detector further comprises an LCD screen, the LCD screen is electrically connected with the control center module, and the LCD screen is embedded on the shell.
The control center module is a single chip microcomputer.
Compared with the prior art, the utility model following beneficial effect has:
one, the utility model discloses a hall voltage sensor and hall current sensor, the data that produce during voltage fluctuation still can be detected by hall voltage sensor and hall current sensor accuracy, and then the accurate calculation is surveyed the earth resistance value.
Two, the utility model discloses an auxiliary relay KA1, auxiliary relay KA2, auxiliary relay KA3 and button module can switch on or break off by accurate control earthing pole, auxiliary voltage utmost point and auxiliary current utmost point, and voltage and current value separately measure, and reducible external factor disturbs, improves the detection precision.
Thirdly, the utility model discloses an earthing pole, auxiliary voltage utmost point, auxiliary current utmost point and shell split are carried, during the use directly peg graft can, convenient to use carries conveniently simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Fig. 3 is the utility model discloses earthing pole, auxiliary voltage utmost point and auxiliary current utmost point and power wiring schematic diagram.
Fig. 4 is the driving circuit diagram of the intermediate relay and control center module of the present invention.
In the figure: 1 is the control center module, 2 is hall voltage sensor, 3 is hall current sensor, 4 is the earthing pole, 5 is the auxiliary voltage utmost point, 6 is the auxiliary current utmost point, 7 is the button module, 8 is the shell, and 9 is the LCD screen.
Detailed Description
For a further understanding of the present invention, reference will now be made in detail to the following examples and embodiments, taken in conjunction with the accompanying drawings:
as shown in fig. 1 to 4: ground resistance on-line measuring appearance, include: the control center module 1, the Hall voltage sensor 2, the Hall current sensor 3, the grounding electrode 4, the auxiliary voltage electrode 5, the auxiliary current electrode 6, the key module 7 and the power supply; control center module 1 respectively with hall voltage sensor 2, hall current sensor 3 and button module 7 electrical connection, earthing pole 4 is connected with power one end, auxiliary voltage utmost point 5 and auxiliary current utmost point 6 all are connected with the power other end, be provided with hall voltage sensor 2 on auxiliary voltage utmost point 5 and the power connecting circuit, be provided with hall current sensor 3 on auxiliary current utmost point 6 and the power connecting circuit.
The grounding resistance online detector also comprises an intermediate relay KA1, an intermediate relay KA2 and an intermediate relay KA 3;
the coil of the intermediate relay KA1 is KA1.1, and the contact of the intermediate relay KA1 is KA 1.2;
the coil of the intermediate relay KA2 is KA2.1, and the contact of the intermediate relay KA2 is KA 2.2;
the coil of the intermediate relay KA3 is KA3.1, and the contact of the intermediate relay KA3 is KA 3.2;
the intermediate relay contact KA1.2 is arranged on a circuit connecting the grounding electrode 4 and a power supply, the intermediate relay contact KA2.2 is arranged on a circuit connecting the auxiliary voltage electrode 5 and the power supply, and the intermediate relay contact KA3.2 is arranged on a circuit connecting the auxiliary current electrode 6 and the power supply;
and the intermediate relay coil KA1.1, the intermediate relay coil KA2.1 and the intermediate relay coil KA3.1 are respectively electrically connected with the control center module 1.
The grounding resistance on-line detector also comprises a shell 8; control center module 1, hall voltage sensor 2, hall current sensor 3, auxiliary relay KA1, auxiliary relay KA2 and auxiliary relay KA3 and power set up in shell 8, be provided with the output interface of being connected with earthing pole 4, auxiliary voltage utmost point 5 and auxiliary current utmost point 6 on the shell 8.
The grounding electrode 4 is a wire connecting clamp, and the auxiliary voltage electrode 5 and the auxiliary current electrode 6 are stainless steel straight rods.
The power supply comprises a test power supply and a stabilized voltage power supply, wherein the test power supply is as follows: the input end of the inverter module is connected with the output end of the battery, the output end of the inverter module is connected with a transformer, and two ends of the transformer are two ends of a power supply;
the voltage-stabilized power supply is as follows: the input end of the direct current power supply module is connected with the battery, the output end of the direct current power supply module is connected with the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit supplies power to the control center module 1.
Ground resistance on-line measuring appearance still includes LCD screen 9, LCD screen 9 and control center module 1 electrical connection, LCD screen 9 inlays on shell 8.
The control center module 1 adopts a single chip microcomputer STM32f 101.
And ADC analog-to-digital conversion circuits are arranged between the Hall voltage sensor 2 and the Hall current sensor 3 and the control center module 1.
Be provided with drive circuit between auxiliary relay coil KA1.1, auxiliary relay coil KA2.1 and auxiliary relay coil KA3.1 and the singlechip, drive circuit is: resistance R1 one end is connected with the IO pin of control center module 1, the resistance R1 other end is connected with triode Q1 base, and triode Q1 base still connects pull-down resistance R4, triode Q1 collecting electrode parallel connection resistance R2 one end, electric capacity C1 and the intermediate relay coil one end that corresponds, resistance R2 another termination DC power supply module output is connected, electric capacity C1 other end ground connection, ground connection behind the intermediate relay coil other end series connection resistance R3, triode Q1 projecting pole ground connection.
The utility model discloses still include RS232 serial interface or RS485 serial interface.
The utility model discloses specific embodiment as follows:
before use, the intermediate relay KA1, the intermediate relay KA2 and the intermediate relay KA3 are all in an off state, the grounding electrode 4 is contacted with a measured object, the auxiliary voltage electrode 5 and the auxiliary current electrode 6 are positioned on the same straight line with the measured object, the auxiliary voltage electrode 5 is 5-10 m away from the measured object, and the auxiliary current electrode 6 is 5-five-ten meters away from the auxiliary voltage electrode; according to the power key of button module 7, the starting equipment obtains electricity through button module 7 singlechip control intermediate relay coil KA1.1, earthing pole 4 switches on with the power, presses the control and measures the button, auxiliary voltage utmost point 5 switches on with the power, and hall voltage sensor 2 uploads the singlechip with voltage signal this moment, presses the measurement button for a long time, and singlechip control intermediate relay coil KA2.1 loses the electricity, and auxiliary voltage utmost point 5 and power disconnection, intermediate relay coil KA3.1 obtain the electricity simultaneously, auxiliary current utmost point 6 switches on with the power, and hall current sensor 3 reads current numerical value and uploads the singlechip this moment, can obtain earth resistance value according to Rx ═ V/I and error correction.
The above embodiments are merely illustrative of the principles of the present invention and its effects, and do not limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications or changes be made by those skilled in the art without departing from the spirit and technical spirit of the present invention, and be covered by the claims of the present invention.
Claims (7)
1. Ground resistance on-line measuring appearance, its characterized in that includes: the device comprises a control center module (1), a Hall voltage sensor (2), a Hall current sensor (3), a grounding electrode (4), an auxiliary voltage electrode (5), an auxiliary current electrode (6), a key module (7) and a power supply; control center module (1) respectively with hall voltage sensor (2), hall current sensor (3) and button module (7) electrical connection, earthing pole (4) are connected with power one end, auxiliary voltage pole (5) and auxiliary current pole (6) all are connected with the power other end, be provided with hall voltage sensor (2) on auxiliary voltage pole (5) and the power connection circuit, be provided with hall current sensor (3) on auxiliary current pole (6) and the power connection circuit.
2. The ground resistance on-line detector of claim 1, characterized in that: the grounding resistance online detector also comprises an intermediate relay KA1, an intermediate relay KA2 and an intermediate relay KA 3;
the coil of the intermediate relay KA1 is KA1.1, and the contact of the intermediate relay KA1 is KA 1.2;
the coil of the intermediate relay KA2 is KA2.1, and the contact of the intermediate relay KA2 is KA 2.2;
the coil of the intermediate relay KA3 is KA3.1, and the contact of the intermediate relay KA3 is KA 3.2;
the intermediate relay contact KA1.2 is arranged on a circuit for connecting a grounding electrode (4) with a power supply, the intermediate relay contact KA2.2 is arranged on a circuit for connecting an auxiliary voltage electrode (5) with the power supply, and the intermediate relay contact KA3.2 is arranged on a circuit for connecting an auxiliary current electrode (6) with the power supply;
the intermediate relay coil KA1.1, the intermediate relay coil KA2.1 and the intermediate relay coil KA3.1 are electrically connected with the control center module (1) respectively.
3. The ground resistance on-line detector of claim 2, characterized in that: the grounding resistance on-line detector also comprises a shell (8); control center module (1), hall voltage sensor (2), hall current sensor (3), auxiliary relay KA1, auxiliary relay KA2 and auxiliary relay KA3 and power set up in shell (8), be provided with the output interface of being connected with earthing pole (4), auxiliary voltage utmost point (5) and auxiliary current utmost point (6) on shell (8).
4. The ground resistance on-line detector of claim 3, characterized in that: the grounding electrode (4) is a wire connecting clamp, and the auxiliary voltage electrode (5) and the auxiliary current electrode (6) are stainless steel straight rods.
5. The ground resistance on-line detector of claim 4, characterized in that: the power supply comprises a test power supply and a stabilized voltage power supply, wherein the test power supply is as follows: the input end of the inverter module is connected with the output end of the battery, the output end of the inverter module is connected with a transformer, and two ends of the transformer are two ends of a power supply;
the voltage-stabilized power supply is as follows: the input end of the direct current power supply module is connected with the battery, the output end of the direct current power supply module is connected with the input end of the voltage stabilizing circuit, and the output end of the voltage stabilizing circuit supplies power for the control center module (1).
6. The ground resistance on-line detector of claim 5, characterized in that: ground resistance on-line measuring appearance still includes LCD screen (9), LCD screen (9) and control center module (1) electrical connection, inlay on shell (8) LCD screen (9).
7. The ground resistance on-line detector of claim 6, characterized in that: the control center module (1) is a single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120904795.4U CN214845495U (en) | 2021-04-28 | 2021-04-28 | Grounding resistance on-line detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120904795.4U CN214845495U (en) | 2021-04-28 | 2021-04-28 | Grounding resistance on-line detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214845495U true CN214845495U (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120904795.4U Active CN214845495U (en) | 2021-04-28 | 2021-04-28 | Grounding resistance on-line detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214845495U (en) |
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2021
- 2021-04-28 CN CN202120904795.4U patent/CN214845495U/en active Active
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