CN108181964A - Temperature-compensation circuit - Google Patents
Temperature-compensation circuit Download PDFInfo
- Publication number
- CN108181964A CN108181964A CN201711435561.4A CN201711435561A CN108181964A CN 108181964 A CN108181964 A CN 108181964A CN 201711435561 A CN201711435561 A CN 201711435561A CN 108181964 A CN108181964 A CN 108181964A
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- CN
- China
- Prior art keywords
- resistance
- electrically connected
- current detection
- detection circuit
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/567—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for temperature compensation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
Temperature-compensation circuit,Including analog-digital converter,The output terminal of analog-digital converter is electrically connected composition control circuit with the input terminal of microcontroller,The SPI port of microcontroller is electrically connected with the control terminal of digital regulation resistance,The output terminal of digital regulation resistance is electrically connected with the control terminal of voltage-adjustable power,The output terminal of voltage-adjustable power is electrically connected with the input port of current detection circuit,The sample port of current detection circuit is electrically connected with analog-digital converter,When environment temperature increases,Constant-current source circuit saturation,Normal current cannot be then provided,Microcontroller,After the control circuit of analog-digital converter composition detects emission current exception,And combine the ambient temperature value of detection,Digital regulation resistance is adjusted,Increase the output voltage of voltage-adjustable power,So as to make constant-current source circuit that saturation not occur under high temperature environment,Constant transmission power is provided,With simple in structure,The characteristics of highly practical.
Description
Technical field
The present invention relates to a kind of circuit, more particularly to a kind of temperature-compensation circuit.
Background technology
Transient electromagnetic detecting technology is sensitive to the low resistance objectives precursor reactant such as water body, metal, has been widely used in underground gold
Metal conduit detects.For transmitter necessary in transient electromagnetic detecting, emission current is needed to keep permanent in emission process
It is fixed.Transmitter is according to the law of electromagnetic induction, to transmitting coil for after an alternating current, receiving coil generates the sense changed over time
Electromotive force is answered, when tested tubing string thickness change or existing defects, induced electromotive force changes.In actual circuit, to hair
Ray circle supplies DC pulse, and using constant-current source, makes transmission power constant.But as environment temperature increases, transmitting coil internal resistance
Increase, the feedback voltage of constant-current source circuit also increases, when higher than supply voltage, constant-current source circuit saturation, it is impossible to which normal electricity is provided
Stream, therefore cannot keep the constant of transmission power.
Invention content
It in order to overcome the above-mentioned deficiencies of the prior art, can it is an object of the invention to propose a kind of temperature-compensation circuit
Transmission power is constant under realization hot environment, has the characteristics that simple in structure, highly practical.
To achieve these goals, the technical solution adopted by the present invention is：
Temperature-compensation circuit, including analog-digital converter, the output terminal of analog-digital converter is electrically connected with the input terminal of microcontroller
Composition control circuit, the SPI port of microcontroller are electrically connected with the control terminal of digital regulation resistance, output terminal and the electricity of digital regulation resistance
The control terminal electrical connection of regulated power supply is pressed, the output terminal of voltage-adjustable power is electrically connected with the input port of current detection circuit,
The sample port of current detection circuit is electrically connected with analog-digital converter.
The current detection circuit includes a sample resistance 5 and four divider resistances, the input terminal of current detection circuit
Mouth connects one end of sample resistance 5 and one end of the first divider resistance 1；The second divider resistance of another termination 2 of first divider resistance 1
One end, and as the sample port of current detection circuit；The output port of current detection circuit connects the other end of sample resistance 5
With one end of third divider resistance 3；One end of the 4th divider resistance 4 of another termination of third divider resistance 3, and examined as electric current
The sample port of slowdown monitoring circuit；The other end of second divider resistance 2 and the other end of the 4th divider resistance 4 are connected.
Since the present invention is by microcontroller and analog-digital converter composition control circuit, it is able to detect that emission current whether there is
It is abnormal, and the ambient temperature value of detection is combined, digital regulation resistance is adjusted, makes the output voltage liter of voltage-adjustable power
Height so as to make constant-current source circuit that saturation not occur under high temperature environment, provides constant transmission power.It can realize hot environment
Transmission power is constant under (175 DEG C), has the characteristics that simple in structure, highly practical.
Description of the drawings
Fig. 1 is the principle of the present invention block diagram.
Fig. 2 is the circuit diagram of current detection circuit.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, temperature-compensation circuit, including analog-digital converter, the input of the output terminal and microcontroller of analog-digital converter
End electrical connection composition control circuit, the SPI port of microcontroller is electrically connected with the control terminal of digital regulation resistance, digital regulation resistance it is defeated
Outlet is electrically connected with the control terminal of voltage-adjustable power, the output terminal of voltage-adjustable power and the input port of current detection circuit
Electrical connection, the sample port of current detection circuit are electrically connected with analog-digital converter.The output port output of current detection circuit is adjusted
The voltage haveing suffered.
Referring to Fig. 2, the current detection circuit includes a sample resistance 5 and four divider resistances, current detection circuit
Input port connect one end of sample resistance 5 and one end of the first divider resistance 1；Another termination second of first divider resistance 1
One end of divider resistance 2, and as the sample port of current detection circuit；The output port of current detection circuit connects sample resistance
5 other end and one end of third divider resistance 3；One end of the 4th divider resistance 4 of another termination of third divider resistance 3, and
Sample port as current detection circuit；The other end of second divider resistance 2 and the other end of the 4th divider resistance 4 are connected.
The present invention operation principle be：
Supply voltage of the voltage-adjustable power output voltage as constant-current source, under room temperature, constant-current source normal work works as environment
Temperature increases, and transmitting coil internal resistance increases, and the feedback voltage of constant-current source circuit also increases, when higher than supply voltage, constant-current source electricity
Road saturation cannot then provide normal current.The control circuit that microcontroller, analog-digital converter form detects emission current exception
Afterwards, and the ambient temperature value detected is combined, digital regulation resistance is adjusted, increases the output voltage of voltage-adjustable power,
So as to make constant-current source circuit that saturation not occur under high temperature environment, constant transmission power is provided.
Claims (2)
1. temperature-compensation circuit, which is characterized in that including analog-digital converter, the input of the output terminal and microcontroller of analog-digital converter
End electrical connection composition control circuit, the SPI port of microcontroller is electrically connected with the control terminal of digital regulation resistance, digital regulation resistance it is defeated
Outlet is electrically connected with the control terminal of voltage-adjustable power, the output terminal of voltage-adjustable power and the input port of current detection circuit
Electrical connection, the sample port of current detection circuit are electrically connected with analog-digital converter.
2. temperature-compensation circuit according to claim 1, which is characterized in that the current detection circuit includes a sampling
Resistance (5) and four divider resistances, the input port of current detection circuit connect one end and the first divider resistance of sample resistance (5)
(1) one end；One end of the second divider resistance of another termination (2) of first divider resistance (1), and as current detection circuit
Sample port；The output port of current detection circuit connects the other end of sample resistance (5) and one end of third divider resistance (3)；
One end of the 4th divider resistance (4) of another termination of third divider resistance (3), and as the sample port of current detection circuit；
The other end of the other end of second divider resistance (2) and the 4th divider resistance (4) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711435561.4A CN108181964A (en) | 2017-12-26 | 2017-12-26 | Temperature-compensation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711435561.4A CN108181964A (en) | 2017-12-26 | 2017-12-26 | Temperature-compensation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108181964A true CN108181964A (en) | 2018-06-19 |
Family
ID=62547269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711435561.4A Pending CN108181964A (en) | 2017-12-26 | 2017-12-26 | Temperature-compensation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108181964A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736651A (en) * | 2020-05-26 | 2020-10-02 | 中国电子科技集团公司第四十三研究所 | Temperature compensation constant current source circuit and temperature compensation method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835317A (en) * | 2006-04-07 | 2006-09-20 | 王继存 | Intelligent electricity leakage protector |
| CN200958946Y (en) * | 2006-05-25 | 2007-10-10 | 中国科学院长春光学精密机械与物理研究所 | Light-source temperature-compensating circuit of photoelectric axis angle encoder |
| CN201312403Y (en) * | 2008-11-25 | 2009-09-16 | 皇明太阳能集团有限公司 | Intelligent solar energy lamp controller |
| CN201345639Y (en) * | 2008-11-14 | 2009-11-11 | 福建三元达通讯股份有限公司 | Intelligent device for temperature compensation of power amplifier tube |
| CN104991115A (en) * | 2015-06-12 | 2015-10-21 | 武汉精测电子技术股份有限公司 | Chopper-type direct current detection method and circuit |
| CN205334695U (en) * | 2016-01-21 | 2016-06-22 | 济南市长清计算机应用公司 | Portable combustible gas alarm |
| CN207704307U (en) * | 2017-12-26 | 2018-08-07 | 西安格威石油仪器有限公司 | A kind of temperature-compensation circuit |
-
2017
- 2017-12-26 CN CN201711435561.4A patent/CN108181964A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1835317A (en) * | 2006-04-07 | 2006-09-20 | 王继存 | Intelligent electricity leakage protector |
| CN200958946Y (en) * | 2006-05-25 | 2007-10-10 | 中国科学院长春光学精密机械与物理研究所 | Light-source temperature-compensating circuit of photoelectric axis angle encoder |
| CN201345639Y (en) * | 2008-11-14 | 2009-11-11 | 福建三元达通讯股份有限公司 | Intelligent device for temperature compensation of power amplifier tube |
| CN201312403Y (en) * | 2008-11-25 | 2009-09-16 | 皇明太阳能集团有限公司 | Intelligent solar energy lamp controller |
| CN104991115A (en) * | 2015-06-12 | 2015-10-21 | 武汉精测电子技术股份有限公司 | Chopper-type direct current detection method and circuit |
| CN205334695U (en) * | 2016-01-21 | 2016-06-22 | 济南市长清计算机应用公司 | Portable combustible gas alarm |
| CN207704307U (en) * | 2017-12-26 | 2018-08-07 | 西安格威石油仪器有限公司 | A kind of temperature-compensation circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736651A (en) * | 2020-05-26 | 2020-10-02 | 中国电子科技集团公司第四十三研究所 | Temperature compensation constant current source circuit and temperature compensation method |
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