CN104634463A - Temperature detection circuit for ultrasonic ranging temperature compensation - Google Patents
Temperature detection circuit for ultrasonic ranging temperature compensation Download PDFInfo
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- CN104634463A CN104634463A CN201310549662.XA CN201310549662A CN104634463A CN 104634463 A CN104634463 A CN 104634463A CN 201310549662 A CN201310549662 A CN 201310549662A CN 104634463 A CN104634463 A CN 104634463A
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- resistance
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- voltage comparator
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Abstract
The invention discloses a temperature detection circuit for ultrasonic ranging temperature compensation, comprising first to eleventh resistors, first to fourth capacitors, an amplifier, a voltage comparator, a first potentiometer, a second potentiometer, a voltage stabilizing diode, and a semiconductor temperature sensor. A first end of the first resistor is connected with a voltage input end, and a second end of the first resistor is connected with the negative pole of the voltage stabilizing diode, a first end of the second resistor, and a first end of the third resistor. According to the temperature detection circuit for ultrasonic ranging temperature compensation of the invention, a frequency signal directly proportional to the ambient temperature is acquired by the temperature detection circuit, and then the frequency signal is sent to an upper chip to carry out temperature compensation on ultrasonic ranging, thus eliminating the error.
Description
Technical field
The present invention relates to a kind of temperature sensing circuit, particularly relate to a kind of temperature sensing circuit for ultrasonic ranging temperature compensation.
Background technology
Because ultrasound wave directive property is strong, energy ezpenditure is slow, that propagates in media as well is distant, thus ultrasound wave is through being usually used in the measurement of distance, utilize ultrasound examination often relatively rapidly, convenient, calculate simple, be easy to accomplish real-time control, and can reach the requirement that industry is practical in measuring accuracy, when environment temperature changes, hyperacoustic velocity of propagation also changes, and this will cause range error thereupon.
Summary of the invention
Object of the present invention is just to provide a kind of temperature sensing circuit for ultrasonic ranging temperature compensation to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of temperature sensing circuit for ultrasonic ranging temperature compensation, first resistance is to the 11 resistance, first electric capacity is to the 4th electric capacity, amplifier, voltage comparator, first potentiometer, second potentiometer, voltage stabilizing diode and semiconductor temperature sensor, first termination voltage input end of described first resistance, described first resistance second end respectively with the negative pole of described voltage stabilizing diode, the first end of described second resistance is connected with the first end of described 3rd resistance, second end of described second resistance respectively with the positive pole of described semiconductor temperature sensor, the first end of described tenth resistance is connected with the negative input of described amplifier, second end of described 3rd resistance is connected with the first end of described first potentiometer, the positive pole of described voltage stabilizing diode is connected rear ground connection respectively with the negative pole of described semiconductor temperature sensor and the second end of described first potentiometer, the sliding end of described first potentiometer is connected with the described first end of the 5th resistance and the electrode input end of described amplifier respectively, second end of described tenth resistance is connected with the first end of described 4th resistance, second end of described 4th resistance is connected with the first end of described 11 resistance and the first end of described 6th resistance respectively, second end of described 11 resistance is connected with the output terminal of described amplifier and the first end of described first electric capacity respectively, second end of described first electric capacity is connected rear ground connection with the second end of described 5th resistance, second end of described 6th resistance is connected with the described first end of the 4th electric capacity and the output terminal of described voltage comparator respectively, first termination voltage input end of described 9th resistance, second end of described 9th resistance is connected with the negative input of described voltage comparator and is connected with upper chip input end afterwards, the first end of described 12 resistance is connected with the first end of described 7th resistance and voltage input end respectively, described second end of the 12 resistance is connected with the cathode power supply end of described voltage comparator, second end of described 7th resistance is connected with the first end of described second electric capacity and the control end of described voltage comparator respectively, second end of described second electric capacity is connected rear ground connection respectively with the first end of described 3rd electric capacity and the first end of described 8th resistance, second end of described 3rd electric capacity respectively with the second end of described 8th resistance, the strobe pulse end of described voltage comparator is connected with the earth terminal of described voltage comparator, the first end of described second potentiometer is connected with the electrode input end of described voltage comparator, second end of described second potentiometer is connected rear ground connection respectively with the sliding end of described second potentiometer and the negative electricity source of described voltage comparator.
Beneficial effect of the present invention is:
The present invention is used for the temperature sensing circuit of ultrasonic ranging temperature compensation and utilizes temperature sensing circuit to obtain the frequency signal be directly proportional to environment temperature, then delivers in upper chip and carry out temperature compensation to ultrasonic ranging, can eliminate this error.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the present invention for the temperature sensing circuit of ultrasonic ranging temperature compensation.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the present invention is used for the temperature sensing circuit of ultrasonic ranging temperature compensation, first resistance R1 is to the 12 resistance R12, first electric capacity C1 is to the 4th electric capacity C4, amplifier IC1, voltage comparator ic 2, first potentiometer RP1, second potentiometer RP2, voltage stabilizing diode ZD and semiconductor temperature sensor BT, the first termination voltage input end of the first resistance R1, first resistance R1 second end respectively with the negative pole of voltage stabilizing diode ZD, the first end of the second resistance R2 is connected with the first end of the 3rd resistance R3, second end of the second resistance R2 respectively with the positive pole of semiconductor temperature sensor BT, the first end of the tenth resistance R10 is connected with the negative input of amplifier IC1, second end of the 3rd resistance R3 is connected with the first end of the first potentiometer RP1, the positive pole of voltage stabilizing diode ZD is connected rear ground connection respectively with the negative pole of semiconductor temperature sensor BT and second end of the first potentiometer RP1, the sliding end of the first potentiometer RP1 is connected with the first end of the 5th resistance R5 and the electrode input end of amplifier IC1 respectively, second end of the tenth resistance R10 is connected with the first end of the 4th resistance R4, second end of the 4th resistance R4 is connected with the first end of the 11 resistance R11 and the first end of the 6th resistance R6 respectively, second end of the 11 resistance R11 is connected with the output terminal of amplifier IC1 and the first end of the first electric capacity C1 respectively, second end of the first electric capacity C1 is connected rear ground connection with second end of the 5th resistance R5, second end of the 6th resistance R6 is connected with the first end of the 4th electric capacity C4 and the output terminal of voltage comparator ic 2 respectively, the first termination voltage input end of the 9th resistance R9, second end of the 9th resistance R9 is connected with the negative input of voltage comparator ic 2 and is connected with upper chip input end afterwards, the first end of the 12 resistance R12 is connected with the first end of the 7th resistance R7 and voltage input end respectively, second end of the 12 resistance R12 is connected with the cathode power supply end of voltage comparator ic 2, second end of the 7th resistance R7 is connected with the first end of the second electric capacity C2 and the control end of voltage comparator ic 2 respectively, second end of the second electric capacity C2 is connected rear ground connection respectively with the first end of the 3rd electric capacity C3 and the first end of the 8th resistance R8, second end of the 3rd electric capacity C3 respectively with second end of the 8th resistance R8, the strobe pulse end of voltage comparator ic 2 is connected with the earth terminal of voltage comparator ic 2, the first end of the second potentiometer RP2 is connected with the electrode input end of voltage comparator ic 2, second end of the second potentiometer RP2 is connected rear ground connection respectively with the sliding end of the second potentiometer RP2 and the negative electricity source of voltage comparator ic 2.
The principle of work that the present invention is used for the temperature sensing circuit of ultrasonic ranging temperature compensation is as follows:
Utilize semiconductor temperature sensor BT environment temperature to be converted to the analog voltage signal of millivolt level, deliver to amplifier IC1 and zoom into larger voltage signal, then carry out the conversion of electric voltage frequency through voltage comparator ic 2, the frequency signal of acquisition delivers to upper chip.First potentiometer RP1 is gain-adjusted potentiometer, and the second potentiometer RP2 is frequency calibration potentiometer.
Claims (1)
1. the temperature sensing circuit for ultrasonic ranging temperature compensation, it is characterized in that: the first resistance is to the 11 resistance, first electric capacity is to the 4th electric capacity, amplifier, voltage comparator, first potentiometer, second potentiometer, voltage stabilizing diode and semiconductor temperature sensor, first termination voltage input end of described first resistance, described first resistance second end respectively with the negative pole of described voltage stabilizing diode, the first end of described second resistance is connected with the first end of described 3rd resistance, second end of described second resistance respectively with the positive pole of described semiconductor temperature sensor, the first end of described tenth resistance is connected with the negative input of described amplifier, second end of described 3rd resistance is connected with the first end of described first potentiometer, the positive pole of described voltage stabilizing diode is connected rear ground connection respectively with the negative pole of described semiconductor temperature sensor and the second end of described first potentiometer, the sliding end of described first potentiometer is connected with the described first end of the 5th resistance and the electrode input end of described amplifier respectively, second end of described tenth resistance is connected with the first end of described 4th resistance, second end of described 4th resistance is connected with the first end of described 11 resistance and the first end of described 6th resistance respectively, second end of described 11 resistance is connected with the output terminal of described amplifier and the first end of described first electric capacity respectively, second end of described first electric capacity is connected rear ground connection with the second end of described 5th resistance, second end of described 6th resistance is connected with the described first end of the 4th electric capacity and the output terminal of described voltage comparator respectively, first termination voltage input end of described 9th resistance, second end of described 9th resistance is connected with the negative input of described voltage comparator and is connected with upper chip input end afterwards, the first end of described 12 resistance is connected with the first end of described 7th resistance and voltage input end respectively, described second end of the 12 resistance is connected with the cathode power supply end of described voltage comparator, second end of described 7th resistance is connected with the first end of described second electric capacity and the control end of described voltage comparator respectively, second end of described second electric capacity is connected rear ground connection respectively with the first end of described 3rd electric capacity and the first end of described 8th resistance, second end of described 3rd electric capacity respectively with the second end of described 8th resistance, the strobe pulse end of described voltage comparator is connected with the earth terminal of described voltage comparator, the first end of described second potentiometer is connected with the electrode input end of described voltage comparator, second end of described second potentiometer is connected rear ground connection respectively with the sliding end of described second potentiometer and the negative electricity source of described voltage comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310549662.XA CN104634463A (en) | 2013-11-07 | 2013-11-07 | Temperature detection circuit for ultrasonic ranging temperature compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310549662.XA CN104634463A (en) | 2013-11-07 | 2013-11-07 | Temperature detection circuit for ultrasonic ranging temperature compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104634463A true CN104634463A (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310549662.XA Pending CN104634463A (en) | 2013-11-07 | 2013-11-07 | Temperature detection circuit for ultrasonic ranging temperature compensation |
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| CN (1) | CN104634463A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064293A (en) * | 2017-06-03 | 2017-08-18 | 常州顺创电气科技有限公司 | SF6 detectors and detection method, compensation method and method of work |
| CN112254821A (en) * | 2020-10-16 | 2021-01-22 | 盈合(深圳)机器人与自动化科技有限公司 | Method and device for compensating body temperature detection precision through visual ranging |
-
2013
- 2013-11-07 CN CN201310549662.XA patent/CN104634463A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064293A (en) * | 2017-06-03 | 2017-08-18 | 常州顺创电气科技有限公司 | SF6 detectors and detection method, compensation method and method of work |
| CN112254821A (en) * | 2020-10-16 | 2021-01-22 | 盈合(深圳)机器人与自动化科技有限公司 | Method and device for compensating body temperature detection precision through visual ranging |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
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| WD01 | Invention patent application deemed withdrawn after publication |