CN202119841U - Intelligent sensing transmitter for oil field slurry conductivity - Google Patents
Intelligent sensing transmitter for oil field slurry conductivity Download PDFInfo
- Publication number
- CN202119841U CN202119841U CN2011201760687U CN201120176068U CN202119841U CN 202119841 U CN202119841 U CN 202119841U CN 2011201760687 U CN2011201760687 U CN 2011201760687U CN 201120176068 U CN201120176068 U CN 201120176068U CN 202119841 U CN202119841 U CN 202119841U
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- chip microcomputer
- circuit
- ntc thermistor
- module
- temperature detecting
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses an intelligent sensing transmitter for an oil field slurry conductivity, comprising a single chip microcomputer, a bipolar pulse square wave module, a current output module, a filtering and amplification circuit, a rectification circuit, an offset amplification circuit, an amplitude limiting circuit, and an NTC thermistor temperature measurement module for temperature compensating. Compared with the prior art, the intelligent sensing transmitter has the functions of automatic zero adjusting and full scale adjusting, avoiding the trouble brought by manual adjusting of a potentiometer, and having more flexibility and precision index.
Description
Technical field
The utility model relates to php slurry conductivity sensor field, is specially a kind of intelligent php slurry conductivity sensing transducer.
Background technology
In field produces, need measure the php slurry conductivity.The general employing of prior art can be measured the conductivity meter of liquid the conductivity of php slurry is measured.Conductivity meter generally be through driving source to php slurry output drive signal, and receive through secondary receiving coil that induced signal that php slurry produces measures.But the conductivity meter of prior art is when measuring php slurry, because measured dielectric polarization, and Influence of Temperature, can cause measuring accuracy to reduce.
The utility model content
The purpose of the utility model provides a kind of intelligent php slurry conductivity sensing transducer, when measuring with the conductivity meter that solves prior art because the problem that dielectric polarization and temperature effect cause measuring accuracy to reduce.
In order to achieve the above object, the technical scheme that the utility model adopted is:
Intelligent php slurry conductivity sensing transducer; It is characterized in that: include the single-chip microcomputer that model is MSP430F1xx, high-frequency bipolar pulse square wave module, electric current output module; Said electric current output module input end inserts single-chip microcomputer; Said bipolar pulse square wave module controls termination is gone into single-chip microcomputer, and bipolar pulse square wave module output terminal is connected to the drive coil that stretches in the mud, also comprises filter amplification circuit; Said filter amplification circuit input end is connected to the secondary coil that stretches in the mud, and the output of filter amplification circuit is successively through inserting said single-chip microcomputer after rectification circuit, skew amplifying circuit, the amplitude limiter circuit.
Described intelligent php slurry conductivity sensing transducer; It is characterized in that: also have access to NTC thermistor temperature detecting module on the said single-chip microcomputer; Said NTC thermistor temperature detecting module comprises NTC thermistor temperature detecting electric bridge, differential amplifier circuit; Said NTC thermistor temperature detecting electric bridge one input termination constant current source; Another input end grounding, NTC thermistor temperature detecting electric bridge two output terminals are in-phase input end, the inverting input of corresponding one by one access differential amplifying circuit respectively, and the output of said differential amplifier circuit inserts single-chip microcomputer.
The utility model adopts the driving source of high-frequency bipolar pulse square wave module as system; Because the preceding half period in pumping signal equates with back half period amplitude, polarity is opposite; Exciting current is reverse with value, can weaken tested measured dielectric polarization phenomenon.
The utility model core has adopted 16 single-chip microcomputer MSP430F1xx of super low-power consumption as master controller, is responsible for the output of current signal, the collection of conductivity data, and the processing of data and correction.
The utility model adopts the actual temperature of NTC thermistor tracer liquid, and carries out temperature drift compensation through scm software, has manual, auto thermal compensation function.Under automatic mode, single-chip microcomputer is regularly gathered actual temperature value through thermistor, calculates the actual conductivity compensation rate through the sectional type fitting a straight line compensation formula that leaves in the CPU internal memory again, and then overcomes the temperature variant influence of conductivity.Under manual mode, measured value at this moment is worth as a reference, be used for calibration.
The utility model compared with prior art has automatic zero point and full scale adjustment; Need not 4mA zero potentiometer and 20mA full scale potentiometer; Simplified by manual work adjustment potentiometer trouble caused, and employing has greater flexibility and precision index based on the scm software temperature self-compensation.
Description of drawings
Fig. 1 is the utility model schematic block circuit diagram.
Fig. 2 is the utility model NTC thermistor temperature detecting modular circuit schematic diagram.
Embodiment
As shown in Figure 1.Intelligent php slurry conductivity sensing transducer; Include the electric current output module of the single-chip microcomputer that model is MSP430F1xx, high-frequency bipolar pulse square wave module, 4-20mA; Electric current output module input end inserts single-chip microcomputer; Bipolar pulse square wave module controls termination is gone into single-chip microcomputer, and bipolar pulse square wave module output terminal is connected to the drive coil that stretches in the mud, also comprises filter amplification circuit; The filter amplification circuit input end is connected to the secondary coil that stretches in the mud, inserts single-chip microcomputer after the skew amplifying circuit that the output of filter amplification circuit is formed through rectification circuit, by offset compensation circuit and differential amplifier circuit successively, the amplitude limiter circuit.
As shown in Figure 2.Also have access to NTC thermistor temperature detecting module on the single-chip microcomputer; NTC thermistor temperature detecting module comprises NTC thermistor temperature detecting electric bridge, differential amplifier circuit; NTC thermistor temperature detecting electric bridge one input termination constant current source; Another input end grounding, NTC thermistor temperature detecting electric bridge two output terminals are in-phase input end, the inverting input of corresponding one by one access differential amplifying circuit respectively, and the output of differential amplifier circuit inserts single-chip microcomputer.
The software adopted modular design in single-chip microcomputer, main functional modules comprises: initialize routine, electricity are led sampling subroutine, temperature sampling subroutine, data processing subroutine (mainly comprising filtering, sum of errors temperature compensation calculating), electric current output subroutine, zero point and full scale adjustment interruption subroutine, gear shift subroutine.
Claims (2)
1. intelligent php slurry conductivity sensing transducer; It is characterized in that: include the single-chip microcomputer that model is MSP430F1xx, high-frequency bipolar pulse square wave module, electric current output module; Said electric current output module input end inserts single-chip microcomputer; Said bipolar pulse square wave module controls termination is gone into single-chip microcomputer, and bipolar pulse square wave module output terminal is connected to the drive coil that stretches in the mud, also comprises filter amplification circuit; Said filter amplification circuit input end is connected to the secondary coil that stretches in the mud, and the output of filter amplification circuit is successively through inserting said single-chip microcomputer after rectification circuit, skew amplifying circuit, the amplitude limiter circuit.
2. intelligent php slurry conductivity sensing transducer according to claim 1; It is characterized in that: also have access to NTC thermistor temperature detecting module on the said single-chip microcomputer; Said NTC thermistor temperature detecting module comprises NTC thermistor temperature detecting electric bridge, differential amplifier circuit; Said NTC thermistor temperature detecting electric bridge one input termination constant current source; Another input end grounding, NTC thermistor temperature detecting electric bridge two output terminals are in-phase input end, the inverting input of corresponding one by one access differential amplifying circuit respectively, and the output of said differential amplifier circuit inserts single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201760687U CN202119841U (en) | 2011-05-28 | 2011-05-28 | Intelligent sensing transmitter for oil field slurry conductivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201760687U CN202119841U (en) | 2011-05-28 | 2011-05-28 | Intelligent sensing transmitter for oil field slurry conductivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202119841U true CN202119841U (en) | 2012-01-18 |
Family
ID=45460895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201760687U Expired - Fee Related CN202119841U (en) | 2011-05-28 | 2011-05-28 | Intelligent sensing transmitter for oil field slurry conductivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202119841U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445298A (en) * | 2018-03-28 | 2018-08-24 | 南京林业大学 | A kind of field coupling type induction conductivity sensor and its characteristic compensation device |
-
2011
- 2011-05-28 CN CN2011201760687U patent/CN202119841U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445298A (en) * | 2018-03-28 | 2018-08-24 | 南京林业大学 | A kind of field coupling type induction conductivity sensor and its characteristic compensation device |
| CN108445298B (en) * | 2018-03-28 | 2024-02-06 | 南京林业大学 | Electric field coupling type induction type conductivity sensor and characteristic compensator thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20170528 |