CN202994894U - High-precision isolated measurement device for high-voltage signals - Google Patents
High-precision isolated measurement device for high-voltage signals Download PDFInfo
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- CN202994894U CN202994894U CN 201220696811 CN201220696811U CN202994894U CN 202994894 U CN202994894 U CN 202994894U CN 201220696811 CN201220696811 CN 201220696811 CN 201220696811 U CN201220696811 U CN 201220696811U CN 202994894 U CN202994894 U CN 202994894U
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Abstract
The utility model discloses a high-precision isolated measurement device for high-voltage signals, comprising a signal sampling circuit, an analog-digital conversion circuit, an isolation communication module, an isolation power supply module and a main control system, wherein the signal sampling circuit, the analog-digital conversion circuit, the isolation communication module and the main control system are connected in sequence, and the isolation power supply module is connected into the analog-digital conversion circuit. With the high-precision isolated measurement device for high-voltage signals, high-precision, safe and isolated measurement on current transmitted by a pseudo random system transmitter can be carried out, and the safety of the working personnel and an instrument control part can be ensured.
Description
Technical field
The utility model relates to geophysical prospecting equipment, and particularly a kind of needs carry out the transmission strong power system of high precision isolation measurement.
Background technology
In the physical prospecting field, need to carry out high-acruracy survey to feeding underground high-tension current, guarantee again being perfectly safe of survey crew and measuring system simultaneously.Feeding underground electric current is the pseudo-random pulse electric current, and will certainly there be sizable error in traditional analog quantity isolation measurement, and measures electric weight accurately, is vital for the inverting work of physical prospecting.This just needs safety, isolation, high-acruracy survey feeds underground electric current and magnitude of voltage, and at present temporarily without the device that utilizes this technology to measure.
Summary of the invention
Technical problem to be solved in the utility model is, and is not enough for prior art, and a kind of high-precision high voltage signal isolation measurement device is provided, and realizes that the pseudorandom system transmitter sends the measurement of electric weight.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of high-precision high voltage signal isolation measurement device, comprise signal sampling circuit, analog to digital conversion circuit, isolated communication module, isolation supply module and master control system, described signal sampling circuit, analog to digital conversion circuit, isolated communication module, master control system connect successively, described isolation supply module access analog-digital conversion circuit as described.
As preferred version, described signal sampling circuit comprises the shunt of signal sampling and voltage divider; Described isolated communication module adopts the ADUM2401 high pressure isolated communication chip of AD company, and what the isolation supply module adopted is the WRF1205CKS-1W insulating power supply module of Jin Shengyang company; Analog-digital conversion circuit as described adopts the AD AD7705 of company, and what benchmark adopted is the AD780ARZ chip of AD company; Described master control system adopts the STM32F103RBT6 of ST company.
Principle of work of the present utility model is: utilize shunting or voltage divider with signal sampling, deliver to AD and carry out inside amplification and filtering, and analog-converted is become digital signal, digital signal is delivered to main control chip and is controlled and show by the isolation of SPI interface.Simultaneously, the isolation supply module provides insulating power supply to AD chip and fiducial chip.In order to the safe isolation measurement of the high precision that realizes electric quantity signal.
Compared with prior art, the beneficial effect that the utility model has is: the utility model can satisfy the safe isolation measurement of high precision that the pseudorandom system transmitter sends electric current, the safety of safeguard work personnel and instrument control portion.
Description of drawings
Fig. 1 is the utility model one example structure frame;
Fig. 2 is the utility model one embodiment signal sampling circuit schematic diagram;
Fig. 3 is the utility model one embodiment analog to digital conversion circuit and isolated communication circuit theory diagrams;
Fig. 4 is the utility model one embodiment master control system circuit theory diagrams.
Embodiment
As shown in Figure 1, the utility model one embodiment comprises signal sampling circuit, analog to digital conversion circuit, isolated communication module, isolation supply module and master control system, described signal sampling circuit, analog to digital conversion circuit, isolated communication module, master control system connect successively, described isolation supply module access analog-digital conversion circuit as described.
As shown in Figure 2, signal sampling circuit comprises voltage divider and shunt, and described voltage divider is connected with described shunt.
As shown in Figure 3, analog to digital conversion circuit adopts the AD7705 chip (U2) and the AD780 chip (U3) that is connected with the AD7705 chip of AD company.
As shown in Figure 3, the isolated communication module adopts ADUM2401 high pressure isolated communication chip.
The isolation supply module adopts WRF1205CKS-1W insulating power supply module.
As shown in Figure 4, the single-chip microcomputer model that adopts of master control system is STM32F103VBT6.
Signal sampling circuit is mainly with large electric current and the scaled input range that allows to AD of high pressure; AD carries out signal condition and amplification to simulating signal, and with its digitizing; The isolated communication module with digital signal safe and reliable send master control system to; The isolation supply module provides stable insulating power supply to AD and its benchmark; The signal that master control system is come biography is processed.
Claims (6)
1. high-precision high voltage signal isolation measurement device, comprise signal sampling circuit, analog to digital conversion circuit, isolated communication module, isolation supply module and master control system, it is characterized in that, described signal sampling circuit, analog to digital conversion circuit, isolated communication module, master control system connect successively, described isolation supply module access analog-digital conversion circuit as described.
2. high-precision high voltage signal isolation measurement device according to claim 1, is characterized in that, described signal sampling circuit comprises voltage divider and shunt, and described voltage divider is connected with described shunt.
3. high-precision high voltage signal isolation measurement device according to claim 1, is characterized in that, described isolated communication module adopts ADUM2401 high pressure isolated communication chip.
4. high-precision high voltage signal isolation measurement device according to claim 1, is characterized in that, described isolation supply module adopts WRF1205CKS-1W insulating power supply module.
5. high-precision high voltage signal isolation measurement device according to claim 1, is characterized in that, described analog-to-digital conversion module comprises AD7705 chip and the AD780 chip that is connected with the AD7705 chip.
6. high-precision high voltage signal isolation measurement device according to claim 1, is characterized in that, described master control system adopts the STM32F103RBT6 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220696811 CN202994894U (en) | 2012-12-17 | 2012-12-17 | High-precision isolated measurement device for high-voltage signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220696811 CN202994894U (en) | 2012-12-17 | 2012-12-17 | High-precision isolated measurement device for high-voltage signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202994894U true CN202994894U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220696811 Expired - Lifetime CN202994894U (en) | 2012-12-17 | 2012-12-17 | High-precision isolated measurement device for high-voltage signals |
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| CN (1) | CN202994894U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109753090A (en) * | 2019-01-29 | 2019-05-14 | 洪恩流体科技有限公司 | Fire water-supply liquid level multi-path collector |
| CN110702973A (en) * | 2019-10-14 | 2020-01-17 | 四川国信慧通电气技术有限公司 | Online measuring device for induced voltage of cable sheath |
| CN112162140A (en) * | 2020-09-21 | 2021-01-01 | 珠海格力电器股份有限公司 | Isolated high-voltage detection circuit and air purification equipment |
-
2012
- 2012-12-17 CN CN 201220696811 patent/CN202994894U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109753090A (en) * | 2019-01-29 | 2019-05-14 | 洪恩流体科技有限公司 | Fire water-supply liquid level multi-path collector |
| CN109753090B (en) * | 2019-01-29 | 2023-11-07 | 洪恩流体科技有限公司 | Multi-channel collector for fire-fighting water supply level |
| CN110702973A (en) * | 2019-10-14 | 2020-01-17 | 四川国信慧通电气技术有限公司 | Online measuring device for induced voltage of cable sheath |
| CN112162140A (en) * | 2020-09-21 | 2021-01-01 | 珠海格力电器股份有限公司 | Isolated high-voltage detection circuit and air purification equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |