CN203502115U - Signal amplification circuit of pyroelectric temperature measuring system - Google Patents
Signal amplification circuit of pyroelectric temperature measuring system Download PDFInfo
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- CN203502115U CN203502115U CN201320621682.9U CN201320621682U CN203502115U CN 203502115 U CN203502115 U CN 203502115U CN 201320621682 U CN201320621682 U CN 201320621682U CN 203502115 U CN203502115 U CN 203502115U
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- resistance
- amplifier
- electric capacity
- amplification circuit
- measuring system
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Abstract
The utility model discloses a signal amplification circuit of a pyroelectric temperature measuring system. The circuit comprises first to eighth resistors, first to eighth capacitors, a first amplifier, a second amplifier, a potentiometer and a pyroelectric sensor, wherein the voltage input end of the pyroelectric sensor is connected with the first end of the first resistor, the second end of the first resistor is connected with the positive voltage, and the output end of the pyroelectric sensor is connected with the first end of the second resistor, the first end of the second capacitor, the first end of the first capacitor, and the positive input end of the first amplifier. During work of the signal amplification circuit of the pyroelectric temperature measuring system, optical signals are converted into alternate pulse signals after passing through the pyroelectric sensor, the alternate pulse signals enter the amplification circuit, a fifth capacitor filters dc signals in the pulse signals, the potentiometer adjusts the gain of output signals of the sensor, and the output end of the second amplifier sends amplified infrared sensing signals to a signal collection circuit unit for analog-to-digital conversion.
Description
Technical field
The utility model relates to a kind of amplifying circuit, particularly a kind of pyroelectricity temp measuring system signal amplification circuit.
Background technology
In recent years, color comparison temperature measurement instrument, the infrared thermometer that optic fiber thermometer and surface sweeping temperature measurer etc. can meet various demands in succession occurs and constantly improves, the new leap that has been having of infrared temperature-test technology, but present most of infrared thermometer mainly utilizes photon type detector, thermopair and thermoelectric pile, metal or semiconductor thermistor carry out temperature survey, but photon type detector must be worked at a lower temperature, as 77K, 38K or 4.2K, same detector detectivity is at room temperature starkly lower than the detectivity under low temperature, in order to keep the normal work of optical semiconductor subtype detector, often detector is placed in to low-temperature (low temperature) vessel, or make detector reach lower working temperature with micro-refrigerator, to thermometric, work causes certain inconvenience.
Utility model content
The purpose of this utility model is that a kind of pyroelectricity temp measuring system signal amplification circuit will be provided.
For achieving the above object, the utility model is implemented according to following technical scheme:
A kind of pyroelectricity temp measuring system signal amplification circuit, comprise the first resistance to the eight resistance, the first electric capacity to the eight electric capacity, the first amplifier, the second amplifier, potentiometer and pyroelectric sensor, the voltage input end of described pyroelectric sensor is connected with the first end of described the first resistance, the second termination positive voltage of described the first resistance, the output terminal of described pyroelectric sensor respectively with the first end of described the second resistance, the first end of described the second electric capacity, the first end of described the first electric capacity is connected with the normal phase input end of described the first amplifier, the second end of described the first electric capacity respectively with the first end of described the 3rd resistance, the first end of described the 3rd electric capacity, the first end of described the 4th resistance is connected with the inverting input of described the first amplifier, the second end of described the 4th resistance and the first end of described the 4th electric capacity, the output terminal of described the first amplifier respectively with the second end of described the 3rd resistance, the second end of described the 3rd electric capacity is connected with the first end of described the 5th electric capacity, the cathode voltage input termination positive voltage of described the first amplifier, the cathode voltage input end grounding of described the first amplifier, the second end of described the 5th electric capacity is connected with the first end of described the 5th resistance, the second end of described the 5th resistance respectively with the first end of described the 6th electric capacity, the sliding end of described potentiometer, the first end of described potentiometer, the first end of described the 7th electric capacity is connected with the inverting input of described the second amplifier, the second end of described the 7th electric capacity respectively with the first end of described the 8th electric capacity, the normal phase input end of described the second amplifier, the first end of described the 7th resistance is connected with the first end of described the 8th resistance, the second end of described potentiometer is connected with the first end of described the 6th resistance, the second end of described the 6th electric capacity is connected with the output terminal of described the second amplifier with the second end of described the 6th resistance respectively, the output terminal of described the second amplifier is the output terminal of described pyroelectricity temp measuring system signal amplification circuit, the cathode voltage input end of described pyroelectric sensor respectively with the second end of described the second resistance, the second end of described the second electric capacity, the second end of described the 4th electric capacity, the second end of the second end of described the 7th electric capacity and described the 8th resistance is connected and ground connection.
Compared with prior art, in the utility model pyroelectricity temp measuring system signal amplification circuit when work, is when light signal is after pyroelectric sensor, with regard to becoming the pulse signal of alternation, enter amplifying circuit, the 5th electric capacity is for the direct current signal of filtered signal, potentiometer is used for the gain of sensor output signal to regulate, and the output terminal of the second amplifier is sent to signal acquisition circuit unit by the infrared sensing signal after amplifying and carries out mould/number conversion.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of pyroelectricity temp measuring system signal amplification circuit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described, in illustrative examples and the explanation of this utility model, is used for explaining the utility model, but not as to restriction of the present utility model.
Pyroelectricity temp measuring system signal amplification circuit as shown in Figure 1, comprise that the first resistance R 1 is to the 8th resistance R 8, the first capacitor C 1 is to the 8th capacitor C 8, the first amplifier U1, the second amplifier U2, potentiometer RP and pyroelectric sensor S, the voltage input end of pyroelectric sensor S is connected with the first end of the first resistance R 1, the second termination positive voltage of the first resistance R 1, the output terminal of pyroelectric sensor S respectively with the first end of the second resistance R 2, the first end of the second capacitor C 2, the first end of the first capacitor C 1 is connected with the normal phase input end of the first amplifier U1, the second end of the first capacitor C 1 respectively with the first end of the 3rd resistance R 3, the first end of the 3rd capacitor C 3, the first end of the 4th resistance R 4 is connected with the inverting input of the first amplifier U1, the second end of the 4th resistance R 4 and the first end of the 4th capacitor C 4, the output terminal of the first amplifier U1 respectively with the second end of the 3rd resistance R 3, the second end of the 3rd capacitor C 3 is connected with the first end of the 5th capacitor C 5, the cathode voltage input termination positive voltage of the first amplifier U1, the cathode voltage input end grounding of the first amplifier U1, the second end of the 5th capacitor C 5 is connected with the first end of the 5th resistance R 5, the second end of the 5th resistance R 5 respectively with the first end of the 6th capacitor C 6, the sliding end of potentiometer RP, the first end of potentiometer RP, the first end of the 7th capacitor C 7 is connected with the inverting input of the second amplifier U2, the second end of the 7th capacitor C 7 respectively with the first end of the 8th capacitor C 8, the normal phase input end of the second amplifier U2, the first end of the 7th resistance R 7 is connected with the first end of the 8th resistance R 8, the second end of potentiometer RP is connected with the first end of the 6th resistance R 6, the second end of the 6th capacitor C 6 is connected with the output terminal of the second amplifier U2 with the second end of the 6th resistance R 6 respectively, the output terminal of the second amplifier U2 is the output terminal of pyroelectricity temp measuring system signal amplification circuit, the cathode voltage input end of pyroelectric sensor S respectively with the second end of the second resistance R 2, the second end of the second capacitor C 2, the second end of the 4th capacitor C 4, the second end of the second end of the 7th capacitor C 7 and the 8th resistance R 8 is connected and ground connection.
This amplifying circuit adopts the accurate operation amplifier chip of low imbalance LM358, its inside include two independently, the dual operational amplifier of high-gain, internal frequency compensation, integrated transporting discharging LM358 feature is low imbalance, low noise, low drift, is widely used in the occasions such as exact instrument amplifier, sensor amplifier.Infrared sensing signal enters amplifying circuit by the in-phase input end of the first amplifier U1, and the 5th capacitor C 5 is for the direct current signal of filtered signal, and potentiometer RP is used for the gain of sensor output signal to regulate.The second amplifier U2 output terminal is sent to signal acquisition circuit unit by the infrared sensing signal after amplifying and carries out mould/number conversion.
The technical solution of the utility model is not limited to the restriction of above-mentioned specific embodiment, and every technology distortion of making according to the technical solution of the utility model, within all falling into protection domain of the present utility model.
Claims (1)
1. a pyroelectricity temp measuring system signal amplification circuit, it is characterized in that: comprise the first resistance to the eight resistance, the first electric capacity to the eight electric capacity, the first amplifier, the second amplifier, potentiometer and pyroelectric sensor, the voltage input end of described pyroelectric sensor is connected with the first end of described the first resistance, the second termination positive voltage of described the first resistance, the output terminal of described pyroelectric sensor respectively with the first end of described the second resistance, the first end of described the second electric capacity, the first end of described the first electric capacity is connected with the normal phase input end of described the first amplifier, the second end of described the first electric capacity respectively with the first end of described the 3rd resistance, the first end of described the 3rd electric capacity, the first end of described the 4th resistance is connected with the inverting input of described the first amplifier, the second end of described the 4th resistance and the first end of described the 4th electric capacity, the output terminal of described the first amplifier respectively with the second end of described the 3rd resistance, the second end of described the 3rd electric capacity is connected with the first end of described the 5th electric capacity, the cathode voltage input termination positive voltage of described the first amplifier, the cathode voltage input end grounding of described the first amplifier, the second end of described the 5th electric capacity is connected with the first end of described the 5th resistance, the second end of described the 5th resistance respectively with the first end of described the 6th electric capacity, the sliding end of described potentiometer, the first end of described potentiometer, the first end of described the 7th electric capacity is connected with the inverting input of described the second amplifier, the second end of described the 7th electric capacity respectively with the first end of described the 8th electric capacity, the normal phase input end of described the second amplifier, the first end of described the 7th resistance is connected with the first end of described the 8th resistance, the second end of described potentiometer is connected with the first end of described the 6th resistance, the second end of described the 6th electric capacity is connected with the output terminal of described the second amplifier with the second end of described the 6th resistance respectively, the output terminal of described the second amplifier is the output terminal of described pyroelectricity temp measuring system signal amplification circuit, the cathode voltage input end of described pyroelectric sensor respectively with the second end of described the second resistance, the second end of described the second electric capacity, the second end of described the 4th electric capacity, the second end of the second end of described the 7th electric capacity and described the 8th resistance is connected and ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320621682.9U CN203502115U (en) | 2013-10-08 | 2013-10-08 | Signal amplification circuit of pyroelectric temperature measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320621682.9U CN203502115U (en) | 2013-10-08 | 2013-10-08 | Signal amplification circuit of pyroelectric temperature measuring system |
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| Publication Number | Publication Date |
|---|---|
| CN203502115U true CN203502115U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320621682.9U Expired - Fee Related CN203502115U (en) | 2013-10-08 | 2013-10-08 | Signal amplification circuit of pyroelectric temperature measuring system |
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| CN (1) | CN203502115U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208827A (en) * | 2019-05-23 | 2019-09-06 | 罗金林 | A kind of anti-missing system of pulse |
| CN110346051A (en) * | 2018-04-08 | 2019-10-18 | 森霸传感科技股份有限公司 | Integrated circuit for pyroelectric infrared sensor controls chip and control method |
-
2013
- 2013-10-08 CN CN201320621682.9U patent/CN203502115U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346051A (en) * | 2018-04-08 | 2019-10-18 | 森霸传感科技股份有限公司 | Integrated circuit for pyroelectric infrared sensor controls chip and control method |
| CN110208827A (en) * | 2019-05-23 | 2019-09-06 | 罗金林 | A kind of anti-missing system of pulse |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20141008 |
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| EXPY | Termination of patent right or utility model |