CN201548609U - Current signal precision sampling module of transmitter for electrical exploration - Google Patents
Current signal precision sampling module of transmitter for electrical exploration Download PDFInfo
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- CN201548609U CN201548609U CN200920316319XU CN200920316319U CN201548609U CN 201548609 U CN201548609 U CN 201548609U CN 200920316319X U CN200920316319X U CN 200920316319XU CN 200920316319 U CN200920316319 U CN 200920316319U CN 201548609 U CN201548609 U CN 201548609U
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Abstract
A current signal precision sampling module of a transmitter for electrical exploration includes a DC/DC converter U2 and U3, an isolation amplifier U4, a program control amplifier U5 and a sampling resistor U6; a pin 1 and a pin 2 at the power input terminal of two DC/DC converters U2 and U3 are connected; a positive power output from a pin 6, a negative power output from a pin 4 and a power ground output from a pin 5 of the DC/DC converter U2 are respectively connected with pins 1, 2 and 28 of the isolation amplifier U4; the positive power output from the pin 6, the negative power output from the pin 4 and the power ground output from the pin 5 of the DC/DC converter U3 are respectively connected with pins 15, 16 and 14 of the isolation amplifier U4; the positive power output from the pin 6, the negative power output from the pin 4 and the power ground output from the pin 5 of the DC/DC converter U3 are respectively connected with pins 13, 8 and 4 of the isolation amplifier U5; the sampling resistor U6 is connected with pins 27 and 28 at the sampling signal input terminal of the isolation amplifier U4; and pins 13 and 14 at the signal output terminal of the isolation amplifier U4 are in signal connection with the pin 5 signal input terminal and the pin 4 of the program control amplifier U5. The utility model could simultaneously measure the heavy current and the small current in a precise way and has low power consumption.
Description
Technical field
The utility model relates to the accurate sampling module of a kind of resistivity prospecting transmitter current signal.
Background technology
The resistivity prospecting transmitter is measured electric field and the field signal in the electricity exploration, according to different geologic structures and constituent, and the interference signal intensity of different regions, consider to make things convenient for the factor of field construction simultaneously, need transmitter that the useful signal of certain intensity and precision is provided, promptly import the current signal of certain frequency and intensity, for the receiver measurements and calculations to the earth.But present existing Hall current sensor performance can not satisfy the accurate measurement of big electric current and little electric current simultaneously, and sealing in bigger sample resistance, traditional use carries out voltage sampling method, though can reach the purpose of accurate measurement electric current, but consume bigger in ohmically thermal power, power supply is caused bigger waste, and the sample resistance heating causes the entire environment temperature to raise, and influences the performance of other devices; If employing seals in small resistor and carries out voltage sample, ohmically heat power consumption has reduced, but the error of sampling can increase, and is difficult to reach accurate measurement purpose.Therefore, existing current sample module or existing current sample method are difficult to big electric current and little current signal are accurately measured simultaneously.
The utility model content
The purpose of this utility model is to overcome the above-mentioned defective of prior art, and providing a kind of can carry out precision measurement simultaneously to big electric current and little electric current, and the little accurate sampling module of current signal of power consumption.
The purpose of this utility model is achieved through the following technical solutions: the accurate sampling module of a kind of current signal, by two DC/DC converter U2 and U3, an isolated amplifier U4, a programmable amplifier U5, a sample resistance U6 constitutes, power input the 1st pin of described two DC/DC converter U2 and U3 is connected with the 2nd pin, the benchmark positive supply of DC/DC converter U2 the 6th pin output, the benchmark negative supply of the 4th pin output, the 5th pin reference power supply ground respectively with the 1st of isolated amplifier U4, the 2nd, the 28th pin links to each other, the benchmark positive supply of DC/DC converter U3 the 6th pin output, the benchmark negative supply of the 4th pin output, the 5th pin reference power supply ground respectively with the 15th of isolated amplifier U4, the 16th, the 14th pin links to each other, the benchmark positive supply of DC/DC converter U3 the 6th pin output, the benchmark negative supply of the 4th pin output, the 5th pin reference power supply ground respectively with the 13rd of programmable amplifier U5, the 8th, the 4th pin links to each other, sample resistance U6 links to each other with the 28th pin with the sampled signal input end the 27th of isolated amplifier U4, signal output part the 13rd pin of isolated amplifier U4 and the 5th pin signal input part of the 14th pin and programmable amplifier U5, the 4th pin signal ground links to each other.
The utility model both can sample seal in big current signal in the circuit, the little current signal of also can sampling, the precision height, power consumption is little, isolates sampled signal and measuring-signal and program control amplifying signal simultaneously, has avoided the mutual disturbing effect of sample circuit and sample circuit.
Description of drawings
Fig. 1 is the utility model embodiment circuit theory diagrams.
Fig. 2 is an external pinouts embodiment illustrated in fig. 1.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
With reference to Fig. 1, the accurate sampling module embodiment of this current signal is by DC/DC converter U2, DC/DC converter U3, isolated amplifier U4, programmable amplifier U5 and sample resistance U6 constitute, power input 1 pin of described DC/DC converter U2 and DC/DC converter U3 links to each other with 2 pin, the benchmark positive supply of DC/DC converter U2 the 6th pin output, the benchmark negative supply of the 4th pin output, the 5th pin benchmark ground respectively with the 1st pin of isolated amplifier U4, the 2nd pin, 28 pin link to each other, the benchmark positive supply of DC/DC converter U3 the 6th pin output, the benchmark negative supply of the 4th pin output, the 5th pin ground respectively with the 15th of isolated amplifier U4,16,14 pin link to each other, the benchmark positive supply of DC/DC converter U3 the 6th pin output, the benchmark negative supply of the 4th pin output, the 5th pin benchmark ground respectively with the 13rd of programmable amplifier U5,8,4 pin link to each other, sample resistance U6 links to each other with 28 pin with the sampled signal input end 27 of isolated amplifier U4, signal output part 13 pin of isolated amplifier U4 and the 5th pin signal input part of 14 pin and programmable amplifier U5, the 4th pin input signal ground links to each other.
With reference to Fig. 2, the accurate sampling module embodiment of this current signal U1 is provided with external pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, the 1 pins and the 2nd pin respectively for the usefulness that connects working power positive pole and negative pole; The 3rd pin and the 4th pin are respectively needs sampled signal input pin and sampled signal input lower margin; The 5th pin and the 6th pin are respectively the output pin and the sampled signal output lower margin of sampled signal; The 7th pin 7 and the 8th pin are respectively the program control amplification control pin to sampled input signal, and its adjustable enlargement factor is respectively 1 times, 10 times, 100 times, 1000 times.
The present embodiment principle of work:
From the power supply signal of the accurate sampling module U1 of current signal the 1st pin input is identical two DC/DC converter U2 and DC/DC converter U3 power supply, produce the insulating power supply signal of the positive and negative 15V of two-way respectively, for the input and output signal of isolated amplifier U4 provides identical isolation reference signal, the reference power supply of the output end signal of isolated amplifier U4 also provides reference signal for programmable amplifier U5 simultaneously; The 3rd pin and 4 pin of the accurate sampling module U1 of current signal are connected in series in the circuit that needs the sample rate current signal, electric current is through sample resistance U6, produce a correspondent voltage signal, 27 pin and the input of 28 pin from isolated amplifier U4, export through 13 pin and 14 pin from isolated amplifier U4 after isolating, through the corresponding amplification back output of programmable amplifier U5, so just provide a suitable sampled voltage signal then; It is the resistance of copper-manganese that sample resistance U6 among the accurate sampling module U1 of current signal selects material, because the temperature-coefficient of electrical resistance of copper-manganese is little, resistance value varies with temperature very little, so can be used for doing measuring resistance, and select the sample resistance of less resistance, the sample resistance resistance in the utility model scheme is 0.0025 Ω, and the heat power consumption that produces on sample resistance like this is little, both can reduce the power that sample resistance consumes, help reducing the variation of the resistance of sample resistance again.
Claims (1)
1. the accurate sampling module of a resistivity prospecting transmitter current signal, it is characterized in that, by two DC/DC converter U2 and U3, an isolated amplifier U4, a programmable amplifier U5, a sample resistance U6 constitutes, power input the 1st pin of described two DC/DC converter U2 and U3 is connected with the 2nd pin, the benchmark positive supply of DC/DC converter U2 the 6th pin output, the benchmark negative supply of the 4th pin output, the 5th pin reference power supply ground respectively with the 1st of isolated amplifier U4, the 2nd, the 28th pin links to each other, the benchmark positive supply of DC/DC converter U3 the 6th pin output, the benchmark negative supply of the 4th pin output, the 5th pin reference power supply ground respectively with the 15th of isolated amplifier U4, the 16th, the 14th pin links to each other, the benchmark positive supply of DC/DC converter U3 the 6th pin output, the benchmark negative supply of the 4th pin output, the 5th pin reference power supply ground respectively with the 13rd of programmable amplifier U5, the 8th, the 4th pin links to each other, sample resistance U6 links to each other with the 28th pin with the sampled signal input end the 27th of isolated amplifier U4, signal output part the 13rd pin of isolated amplifier U4 and the 5th pin signal input part of the 14th pin and programmable amplifier U5, the 4th pin signal ground links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920316319XU CN201548609U (en) | 2009-12-01 | 2009-12-01 | Current signal precision sampling module of transmitter for electrical exploration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920316319XU CN201548609U (en) | 2009-12-01 | 2009-12-01 | Current signal precision sampling module of transmitter for electrical exploration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201548609U true CN201548609U (en) | 2010-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920316319XU Expired - Fee Related CN201548609U (en) | 2009-12-01 | 2009-12-01 | Current signal precision sampling module of transmitter for electrical exploration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201548609U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253416A (en) * | 2011-05-06 | 2011-11-23 | 中国地质大学（北京） | Multi-functional, high-power, multi-channel, rolling and fast measurement electrical method earthquake comprehensive measuring system |
| CN102540259A (en) * | 2011-12-21 | 2012-07-04 | 吉林大学 | High-density electrical exploration transmitter |
| CN109030913A (en) * | 2018-08-27 | 2018-12-18 | 沃尔特电子（苏州）有限公司 | A kind of current detection means |
-
2009
- 2009-12-01 CN CN200920316319XU patent/CN201548609U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253416A (en) * | 2011-05-06 | 2011-11-23 | 中国地质大学（北京） | Multi-functional, high-power, multi-channel, rolling and fast measurement electrical method earthquake comprehensive measuring system |
| CN102253416B (en) * | 2011-05-06 | 2016-08-03 | 中国地质大学（北京） | Multifunctional high-power multiple tracks rolls quickly measures electrical method earthquake Integrated Measurement System |
| CN102540259A (en) * | 2011-12-21 | 2012-07-04 | 吉林大学 | High-density electrical exploration transmitter |
| CN109030913A (en) * | 2018-08-27 | 2018-12-18 | 沃尔特电子（苏州）有限公司 | A kind of current detection means |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100811 Termination date: 20131201 |