CN204116404U - A kind of ultra-weak electronic signal measurement by magnification circuit of fast detector - Google Patents
A kind of ultra-weak electronic signal measurement by magnification circuit of fast detector Download PDFInfo
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- CN204116404U CN204116404U CN201420510367.3U CN201420510367U CN204116404U CN 204116404 U CN204116404 U CN 204116404U CN 201420510367 U CN201420510367 U CN 201420510367U CN 204116404 U CN204116404 U CN 204116404U
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Abstract
The utility model discloses a kind of ultra-weak electronic signal measurement by magnification circuit of fast detector, this amplifying circuit amplifies change-over circuit, optical-fibre communications circuit, signal receiving circuit and power module by three grades of filtering and amplifying circuits, photoelectricity and forms, input signal is successively through filtering and amplifying circuit and change-over circuit, then be transported in signal receiving circuit and microprocessor by optical fiber, three grades of described filtering and amplifying circuits are based on operational amplifier ICL7650S chip design, and this circuit comprises 3 filtering and amplifying circuit unit U1, U2 and U3; This weak biological amplification circuit of electrical signal structure is simple, with low cost, have employed Fiber isolation and mechanics of communication, improves the antijamming capability of ultra-weak electronic signal in conditioning process, is convenient to record and gathers ultra-weak electronic signal.
Description
Technical field
The utility model belongs to electric and electronic technical field, particularly relates to a kind of ultra-weak electronic signal measurement by magnification circuit of fast detector.
Background technology
Bioelectrical signals in human body is all very faint, is very difficult to the amplification of so faint electric signal and process, as the transmission etc. of the drift of operational amplifier, noise, external interference, channel, all will seriously affect fidelity and the extraction of signal.Therefore to the amplification of ultra-weak electronic signal, the quality of Anti-Jamming Technique is the key of success or not.The detection of slight photo-electric signal is applied very wide in modern industry production run and scientific and technical research, in noncontact and harmless optical measuring technique, it accurately calculates the various optical properties of testing sample by measurement reflection or transmission-polarizing light relative to the change of incident light polarization state, require that pick-up unit not only has higher Measurement Resolution and more will have higher measurement repdocutbility to carry out high precision measurement to polarization state, get rid of the interference of various dissimilar noise to ensure the reliability that high precision is measured.Photoelectric detecting technology is the detection technique that optics combines with electronics and of producing is emerging, and it mainly utilizes electronic technology to detect optical signalling, and transmits further, stores, controls, calculates and display.
The signal that these sensors export generally is feeble signal, wants comprehensively to understand these output signal information, needs faint photosignal to be carried out amplification process, for follow-up data acquisition and exploitation provide research foundation.Therefore, weak signal amplifier technology is very important gordian technique, and the object of Detection of Weak Signals extracts useful signal from very noisy, improves the signal to noise ratio (S/N ratio) of detection system output signal simultaneously.
Summary of the invention
The defect existed for above-mentioned prior art and deficiency, the purpose of this utility model is, a kind of ultra-weak electronic signal measurement by magnification circuit of fast detector is provided, of the present utility model can realization carries out amplification process to ultra-weak electronic signal, have employed Fiber isolation and mechanics of communication, improve the antijamming capability of ultra-weak electronic signal in conditioning process, be convenient to record and gather ultra-weak electronic signal.
In order to realize above-mentioned task, the utility model adopts following technical solution:
A ultra-weak electronic signal measurement by magnification circuit for fast detector, is characterized in that, amplifies change-over circuit, optical-fibre communications circuit, signal receiving circuit and power module form by three grades of filtering and amplifying circuits, photoelectricity; Input signal amplifies change-over circuit through three grades of filtering and amplifying circuits and photoelectricity successively, is transported in signal receiving circuit and microprocessor by optical-fibre communications circuit; Three grades of described filtering and amplifying circuits are connected with input signal; Described photoelectricity amplifies change-over circuit and is connected between three grades of filtering and amplifying circuits and optical-fibre communications circuit; Described signal receiving circuit is connected between optical-fibre communications circuit and microprocessor; Described power module is connected with each circuit module above-mentioned, for it provides stable+5V voltage; Three grades of described filtering and amplifying circuits comprise 3 filtering and amplifying circuit unit U1, U2 and U3, and this filter amplification circuit unit all adopts super operational amplifier ICL7650S chip as core devices; Described power module employing voltage stabilizing chip LM2940 is the+5V power supply of circuit with stable.
In the ultra-weak electronic signal measurement by magnification circuit of this fast detector, described signal receiving circuit comprises photomultiplier (D), operational amplifier (A), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the first resistance (R1), the second resistance (R2) and the 3rd resistance (R3); The negative pole of described photomultiplier (D) is connected with the power supply of+15V, and the positive pole of photomultiplier (D) is connected with the negative pole of the first electric capacity (C1); The output terminal (4) of described operational amplifier (A) is connected with signal output part (Vout), the power end (5) of operational amplifier (A) connects the power supply of+5V, earth terminal (3) ground connection of operational amplifier (A); The positive pole of the first electric capacity (C1) is connected with the inverting input (1) of operational amplifier (A), the positive pole of the second electric capacity (C2) is connected with the in-phase input end (2) of operational amplifier (A), the negative pole of the second electric capacity (C2) is connected to the ground, and the positive pole of the 3rd electric capacity (C3) is connected with the output terminal (4) of operational amplifier (A); Between the negative pole that first resistance (R1) is connected on photomultiplier (D) and ground, second resistance (R2) is in parallel with the second electric capacity (C2), and the 3rd resistance (R3) is connected between the output terminal (4) of operational amplifier (A) and the backward end (1) of operational amplifier (A); The ultra-weak electronic signal measurement by magnification circuit of a kind of fast detector as claimed in claim 1, is characterized in that, described microprocessor adopts Infineon XC2238N high performance chips.
The beneficial effects of the utility model are:
The utility model amplifies change-over circuit, optical-fibre communications circuit, signal receiving circuit and power module 5 part by three grades of filtering and amplifying circuits, photoelectricity altogether and forms.Part I is made up of U1, U2, U3 three-stage amplifier and corresponding filtering circuit.Photoelectricity amplifies change-over circuit as Part II, and its function is being amplified by electric signal while, also plays effect electric signal being changed into light signal.U1, U2, U3, U4 all adopt ICL7650S chip, and the connection of its external devices is the typical apply of ICL7650S chip.Operating voltage takes ± 5V.For improving the signal to noise ratio (S/N ratio) of system, first order enlargement factor is less, and later enlargement factor increases progressively step by step.Part III is optical-fibre communications circuit, and its one end is connected in the light emitting diode place of signal receiving circuit part, and the other end is connected in signal receiving circuit.Part IV is signal receiving circuit, adopts photosensitive receiving tube to receive the light signal of being come by Optical Fiber Transmission.When there being illumination to penetrate photosensitive receiving tube, just have electric current to flow through in receiving circuit, the size of electric current is determined by the light intensity be radiated on it, and the intensity of light is larger, and the electric current in receiving circuit is also larger, thus the voltage that operational amplifier is exported is also higher.Due to the change of the ultra-weak electronic signal of U1 level input, then will be become to the light intensity of photosensitive receiving tube by Optical Fiber Transmission again after U1, U2, U3 level is amplified, thus the voltage that the discharge circuit in signal receiving circuit is exported changes thereupon thereupon.
This ultra-weak electronic signal testing circuit structure is simple, with low cost, can realize carrying out amplification process to faint optical signal, have employed Fiber isolation and mechanics of communication, improve the antijamming capability of ultra-weak electronic signal in conditioning process, be convenient to record and gather ultra-weak electronic signal.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments the utility model is further explained explanation.
Fig. 1 is the schematic diagram of fast detector amplifier of creatures' physical electric signals circuit.
Fig. 2 is the schematic diagram for signal receiving circuit
Embodiment
As the schematic diagram that Fig. 1 is with weak biological amplification circuit of electrical signal, micro-amplification circuit of electrical signal of this handheld device, comprises three grades of filtering and amplifying circuits, photoelectricity amplifies change-over circuit, optical-fibre communications circuit, signal receiving circuit and power module; Input signal amplifies change-over circuit through three grades of filtering and amplifying circuits and photoelectricity successively, is transported in signal receiving circuit and microprocessor by optical-fibre communications circuit; Three grades of described filtering and amplifying circuits are connected with input signal; Described electric light amplifies change-over circuit and is connected between three grades of filtering and amplifying circuits and optical-fibre communications circuit; Described signal receiving circuit is connected between optical-fibre communications circuit and microprocessor; Described power module is connected with each circuit module above-mentioned, for it provides stable+5V voltage; Three grades of described filtering and amplifying circuits comprise 3 filtering and amplifying circuit unit U1, U2 and U3, and this filter amplification circuit unit all adopts super operational amplifier ICL7650S chip as core devices; Described power module employing voltage stabilizing chip LM2940 is the+5V power supply of circuit with stable; Described microprocessor adopts Infineon XC2238N high performance chips.
Fig. 2 is signal receiving circuit schematic diagram, adopts photosensitive receiving tube to receive the light signal of being come by Optical Fiber Transmission.When there being illumination to penetrate photosensitive receiving tube, just have electric current to flow through in receiving circuit, the size of electric current is determined by the light intensity be radiated on it, the intensity of light is larger, electric current in receiving circuit is also larger, thus the voltage that operational amplifier is exported is also higher, and operational amplifier adopts ICL7650S chip.In figure, D is photomultiplier, and when photomultiplier receives useful signal, it changes luminous energy into electric energy, and Vout is the voltage signal exported.In order to meet the requirement of A/D conversion, also amplification process must be carried out to the signal exported.
The utility model person of an ordinary skill in the technical field also can understand in addition to the foregoing, can change combination further in this explanation and illustrated specific embodiment.Such as, Infineon's high-performance microprocessor can be replaced by the MCU of other types according to actual condition.
Claims (5)
1. a ultra-weak electronic signal measurement by magnification circuit for fast detector, is characterized in that, amplifies change-over circuit, optical-fibre communications circuit, signal receiving circuit and power module form by three grades of filtering and amplifying circuits, photoelectricity; Input signal amplifies change-over circuit through three grades of filtering and amplifying circuits and photoelectricity successively, is transported in signal receiving circuit and microprocessor by optical-fibre communications circuit; Three grades of described filtering and amplifying circuits are connected with input signal; Described photoelectricity amplifies change-over circuit and is connected between three grades of filtering and amplifying circuits and optical-fibre communications circuit; Described signal receiving circuit is connected between optical-fibre communications circuit and microprocessor; Described power module is connected with each circuit module above-mentioned, for it provides stable+5V voltage.
2. the ultra-weak electronic signal measurement by magnification circuit of a kind of fast detector as claimed in claim 1, it is characterized in that, three grades of described filtering and amplifying circuits comprise 3 filtering and amplifying circuit unit U1, U2 and U3, and this filter amplification circuit unit all adopts super operational amplifier ICL7650S chip as core devices.
3. the ultra-weak electronic signal measurement by magnification circuit of a kind of fast detector as claimed in claim 1, is characterized in that, described power module employing voltage stabilizing chip LM2940 is the+5V power supply of circuit with stable.
4. the ultra-weak electronic signal measurement by magnification circuit of a kind of fast detector as claimed in claim 1, it is characterized in that, described signal receiving circuit comprises photomultiplier (D), operational amplifier (A), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the first resistance (R1), the second resistance (R2) and the 3rd resistance (R3); The negative pole of described photomultiplier (D) is connected with the power supply of+15V, and the positive pole of photomultiplier (D) is connected with the negative pole of the first electric capacity (C1); The output terminal (4) of described operational amplifier (A) is connected with signal output part (Vout), the power end (5) of operational amplifier (A) connects the power supply of+5V, earth terminal (3) ground connection of operational amplifier (A); The positive pole of the first electric capacity (C1) is connected with the inverting input (1) of operational amplifier (A), the positive pole of the second electric capacity (C2) is connected with the in-phase input end (2) of operational amplifier (A), the negative pole of the second electric capacity (C2) is connected to the ground, and the positive pole of the 3rd electric capacity (C3) is connected with the output terminal (4) of operational amplifier (A); Between the negative pole that first resistance (R1) is connected on photomultiplier (D) and ground, second resistance (R2) is in parallel with the second electric capacity (C2), and the 3rd resistance (R3) is connected between the output terminal (4) of operational amplifier (A) and the backward end (1) of operational amplifier (A).
5. the ultra-weak electronic signal measurement by magnification circuit of a kind of fast detector as claimed in claim 1, is characterized in that, described microprocessor adopts Infineon XC2238N high performance chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420510367.3U CN204116404U (en) | 2014-09-05 | 2014-09-05 | A kind of ultra-weak electronic signal measurement by magnification circuit of fast detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420510367.3U CN204116404U (en) | 2014-09-05 | 2014-09-05 | A kind of ultra-weak electronic signal measurement by magnification circuit of fast detector |
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| Publication Number | Publication Date |
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| CN204116404U true CN204116404U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420510367.3U Expired - Fee Related CN204116404U (en) | 2014-09-05 | 2014-09-05 | A kind of ultra-weak electronic signal measurement by magnification circuit of fast detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923754A (en) * | 2018-04-08 | 2018-11-30 | 安徽师范大学 | A kind of photo detector signal amplifying device |
| CN112555691A (en) * | 2020-11-19 | 2021-03-26 | 山东科技大学 | High-gain low-power-consumption pipeline acoustic signal extraction method |
-
2014
- 2014-09-05 CN CN201420510367.3U patent/CN204116404U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923754A (en) * | 2018-04-08 | 2018-11-30 | 安徽师范大学 | A kind of photo detector signal amplifying device |
| CN112555691A (en) * | 2020-11-19 | 2021-03-26 | 山东科技大学 | High-gain low-power-consumption pipeline acoustic signal extraction method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20150905 |
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| EXPY | Termination of patent right or utility model |