CN210774350U - Thunder and lightning optical radiation detector - Google Patents
Thunder and lightning optical radiation detector Download PDFInfo
- Publication number
- CN210774350U CN210774350U CN201921406991.8U CN201921406991U CN210774350U CN 210774350 U CN210774350 U CN 210774350U CN 201921406991 U CN201921406991 U CN 201921406991U CN 210774350 U CN210774350 U CN 210774350U
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistor
- pass filter
- output end
- filter 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.)
- Active
Links
Images
Abstract
The utility model discloses a thunder and lightning optical radiation detector, which comprises a photoelectric sensor, a high-pass filter circuit and a signal amplifying circuit; the output end of the photoelectric sensor and the output end of the signal amplifying circuit are connected with the input end of the high-pass filter circuit, and the output end of the high-pass filter circuit is connected with the input end of the signal amplifying circuit; wherein the high pass filter circuit comprises an external feedback circuit; the first end of the external feedback circuit is linked with the output end of the signal amplification circuit, so that the interference of noise can be effectively avoided, and the external feedback circuit has a higher signal-to-noise ratio and a larger dynamic range.
Description
Technical Field
The utility model relates to a thunder and lightning detection technical field especially relates to a thunder and lightning optical radiation detector.
Background
The lightning detection technology is an important research field of lightning science. Photoelectric conversion technology is an important means of extracting other useful information by means of light or obtaining light information therefrom. At present, in the actual measurement of lightning light radiation signals, various noise interferences are often encountered, and the measurement accuracy of useful signals is directly influenced.
Disclosure of Invention
An object of the embodiment of the utility model is to provide a thunder and lightning optical radiation detector can effectively avoid the interference of noise, has higher SNR and great dynamic range.
In order to achieve the above object, an embodiment of the present invention provides a lightning optical radiation detector, which includes a photoelectric sensor, a high-pass filter circuit, and a signal amplification circuit;
the output end of the photoelectric sensor and the output end of the signal amplifying circuit are connected with the input end of the high-pass filter circuit, and the output end of the high-pass filter circuit is connected with the input end of the signal amplifying circuit;
wherein the high pass filter circuit comprises an external feedback circuit; and the first end of the external feedback circuit is linked with the output end of the signal amplification circuit.
As an improvement of the above scheme, the high-pass filter circuit includes the external feedback circuit, a first operational amplifier, a second resistor and a second capacitor;
the input end of the high-pass filter circuit is connected with the inverting input end of the first operational amplifier; the output end of the first operational amplifier is connected with the output end of the high-pass filter circuit;
the second end of the external feedback circuit is linked with the inverting input end of the first operational amplifier;
the positive phase input end of the first operational amplifier is connected with the first end of the second resistor, and the second end of the second resistor is grounded;
the second capacitor is connected in parallel to two ends of the second resistor.
As an improvement of the above, the external feedback circuit includes a first resistor and a first capacitor;
the first end of the first resistor is connected with the second end of the external feedback circuit, and the second end of the first resistor is connected with the first end of the external feedback circuit;
the first capacitor is connected in parallel to two ends of the first resistor.
As an improvement of the above scheme, the signal amplification circuit includes a second operational amplifier, a third resistor, a third capacitor, and a fourth resistor;
the input end of the signal amplification circuit is connected with the first end of the third resistor;
the inverting input end of the second operational amplifier is connected with the second end of the third resistor and the first end of the third capacitor; the positive phase input end of the second operational amplifier is grounded;
the second end of the third capacitor is connected with the first end of the fourth resistor;
and the output end of the second operational amplifier is respectively connected with the second end of the fourth resistor and the output end of the signal amplification circuit.
As a modification of the above, the photosensor is a photodiode;
and the cathode of the photodiode is connected with the output end of the photoelectric sensor, and the anode of the photodiode is grounded.
Compared with the prior art, the utility model discloses a thunder and lightning optical radiation detector, including photoelectric sensor, high pass filter circuit, signal amplification circuit; the output end of the photoelectric sensor and the output end of the signal amplifying circuit are connected with the input end of the high-pass filter circuit, and the output end of the high-pass filter circuit is connected with the input end of the signal amplifying circuit; wherein the high pass filter circuit comprises an external feedback circuit; and the first end of the external feedback circuit is linked with the output end of the signal amplification circuit. By connecting a photoelectric sensor, detecting lightning optical signals and inputting the lightning optical signals into a high-pass filter circuit for filtering, noise signals are filtered and only optical signals representing speed change pass through, so that output signals passing through the high-pass filter circuit only represent rapidly changing lightning optical signals, and a lightning optical radiation detector can normally work in the daytime; the optical power of the input lightning optical signal has higher resolution and larger measurement range by connecting an external feedback circuit, and the circuit noise can be effectively reduced; and then the thunder and lightning optical signal passing through the high-pass filter circuit is input to the signal amplification circuit to obtain a thunder and lightning optical variable signal with proper amplitude, so that the interference of noise can be effectively avoided, and the high signal-to-noise ratio and the large dynamic range are achieved.
Drawings
Fig. 1 is a schematic structural diagram of a lightning optical radiation detector according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, which is a schematic structural diagram of a lightning optical radiation detector in an embodiment of the present invention, the lightning optical radiation detector includes a photoelectric sensor 1, a high-pass filter circuit 2, and a signal amplification circuit 3;
the output end of the photoelectric sensor 1 and the output end of the signal amplifying circuit 3 are connected with the input end of the high-pass filter circuit 2, and the output end of the high-pass filter circuit 2 is connected with the input end of the signal amplifying circuit 3;
wherein the high-pass filter circuit 2 comprises an external feedback circuit 21; a first terminal of the external feedback circuit 21 is linked with an output terminal of the signal amplification circuit 3.
It should be noted that the photoelectric sensor 1 is used for detecting a lightning optical signal, and converting the sensed optical signal into an electrical signal, so as to realize conversion from the optical signal to the electrical signal. The high-pass filter circuit 2 may be a circuit chip having a filter processing function. The signal amplification circuit 3 may be a circuit chip having a signal amplification function.
The utility model discloses a theory of operation is:
by connecting the photoelectric sensor 1, the lightning optical signal is detected, and the lightning optical signal is input into the high-pass filter circuit 2 for filtering, so that noise signals are filtered, and only the optical signal representing the speed change passes through, so that the output signal passing through the high-pass filter circuit 2 only represents the rapidly changing lightning optical signal, and the lightning optical radiation detector can normally work in the daytime; the external feedback circuit 21 is connected, so that the optical power of the input lightning optical signal has higher resolution and a larger measurement range, and the circuit noise can be effectively reduced; and then the thunder and lightning optical signal passing through the high-pass filter circuit 2 is input to the signal amplification circuit 3, and the output end VOUT of the signal amplification circuit 3 outputs a thunder and lightning optical variable signal with proper amplitude.
In an alternative embodiment, referring to fig. 1, the photosensor 1 is a photodiode D;
the cathode of the photodiode D is connected with the output end of the photoelectric sensor 1, and the anode of the photodiode D is grounded.
The photoelectric sensor 1 may be a photomultiplier, a photoresistor, a photocell, a photodiode, a PN tube, a phototriode, or the like. In order to effectively solve the problem of various noise interferences in the lightning discharge measurement process in the prior art, the photoelectric sensor 1 adopted in the embodiment has a fast response rate, small additional noise, high responsivity and sufficient bandwidth in the radiation wavelength range of lightning. Illustratively, the HKI-1KL5 PIN photodiode of KODENSHI has the characteristics of good linear characteristic, low dark current, stable operation, high response speed, small applied voltage, small dark current, small volume and the like. In addition, the photodiode has wide spectral characteristics (450-1050nm), a peak wavelength of 920nm, a junction capacitance of 10pF and a drain resistance of 4.7k omega.
In an alternative embodiment, referring to fig. 1, the high-pass filter circuit 2 includes the external feedback circuit 21, a first operational amplifier U1, a second resistor R2, and a second capacitor C2;
the input end of the high-pass filter circuit 2 is connected with the inverting input end of the first operational amplifier U1; the output end of the first operational amplifier U1 is connected with the output end of the high-pass filter circuit 2;
a second terminal of the external feedback circuit 21 is linked with an inverting input terminal of the first operational amplifier U1;
a non-inverting input terminal of the first operational amplifier U1 is connected to a first terminal of the second resistor R2, and a second terminal of the second resistor R2 is grounded;
the second capacitor C2 is connected in parallel across the second resistor R2.
In general, the measured signals in photoelectric measurement are small, and the influence of dark current on useful signals is generally obvious. In addition, because some unknown detailed processes in the lightning occurrence development process need to be acquired in the required lightning optical signal to be detected, the signal may be a very weak signal, so that the interference of noise should be avoided as much as possible, and a photovoltaic mode, namely a zero-offset working mode, is adopted when the circuit is designed. In the zero bias mode, the photosensor 1 can operate in a linear state accurately without considering the influence of dark current, and most of the noise loaded on the photosensor 1 is thermal noise of the shunt resistor. Therefore, the thunder optical signal is input into the high-pass filter circuit 2 for filtering, noise signals can be effectively filtered, and only the optical signal with speed change passes through, so that the output signal passing through the high-pass filter circuit 2 only represents the thunder optical signal with rapid change, and the thunder optical radiation detector can normally work in the daytime.
In an alternative embodiment, referring to fig. 1, the external feedback circuit 21 includes a first resistor R1 and a first capacitor C1;
a first terminal of the first resistor R1 is connected to a second terminal of the external feedback circuit 21, and a second terminal of the first resistor R1 is connected to a first terminal of the external feedback circuit 21;
the first capacitor C1 is connected in parallel across the first resistor R1.
In this embodiment, the external feedback circuit 21 is an amplifier circuit that operates under a short-circuit condition. The first resistor R1 is a feedback resistor, and the circuit structure of the first resistor R1 and the first capacitor C1 in parallel can make the photoelectric sensor have higher resolution and a larger measurement range for the optical power of the input lightning optical signal, effectively reduce the circuit noise, and effectively improve the signal-to-noise ratio along with the increase of the first resistor R1.
In an alternative embodiment, referring to fig. 1, the signal amplifying circuit 3 includes a second operational amplifier U2, a third resistor R3, a third capacitor C3 and a fourth resistor R4;
the input end of the signal amplification circuit 3 is connected with the first end of the third resistor R3;
an inverting input terminal of the second operational amplifier U2 is connected to the second terminal of the third resistor R3 and the first terminal of the third capacitor C3; the non-inverting input terminal of the second operational amplifier U2 is grounded;
a second end of the third capacitor C3 is connected with a first end of the fourth resistor R4;
an output terminal of the second operational amplifier U2 is connected to the second terminal of the fourth resistor R4 and the output terminal VOUT of the signal amplifying circuit 3, respectively.
In this embodiment, the lightning optical signal passing through the high-pass filter circuit 2 is input to the signal amplification circuit 3, and the output terminal VOUT of the signal amplification circuit 3 outputs the lightning optical variation signal of the preset amplitude.
Compared with the prior art, the lightning optical radiation detector of the utility model comprises a photoelectric sensor, a high-pass filter circuit and a signal amplifying circuit; the output end of the photoelectric sensor and the output end of the signal amplifying circuit are connected with the input end of the high-pass filter circuit, and the output end of the high-pass filter circuit is connected with the input end of the signal amplifying circuit; wherein the high pass filter circuit comprises an external feedback circuit; and the first end of the external feedback circuit is linked with the output end of the signal amplification circuit. By connecting a photoelectric sensor, detecting lightning optical signals and inputting the lightning optical signals into a high-pass filter circuit for filtering, noise signals are filtered and only optical signals representing speed change pass through, so that output signals passing through the high-pass filter circuit only represent rapidly changing lightning optical signals, and a lightning optical radiation detector can normally work in the daytime; the optical power of the input lightning optical signal has higher resolution and larger measurement range by connecting an external feedback circuit, and the circuit noise can be effectively reduced; and then the thunder and lightning optical signal passing through the high-pass filter circuit is input to the signal amplification circuit to obtain a thunder and lightning optical variable signal with proper amplitude, so that the interference of noise can be effectively avoided, and the high signal-to-noise ratio and the large dynamic range are achieved.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (5)
1. A thunder and lightning optical radiation detector is characterized by comprising a photoelectric sensor, a high-pass filter circuit and a signal amplification circuit;
the output end of the photoelectric sensor and the output end of the signal amplifying circuit are connected with the input end of the high-pass filter circuit, and the output end of the high-pass filter circuit is connected with the input end of the signal amplifying circuit;
wherein the high pass filter circuit comprises an external feedback circuit; and the first end of the external feedback circuit is linked with the output end of the signal amplification circuit.
2. The lightning optical radiation detector of claim 1, wherein the high pass filter circuit comprises the external feedback circuit, a first operational amplifier, a second resistor and a second capacitor;
the input end of the high-pass filter circuit is connected with the inverting input end of the first operational amplifier; the output end of the first operational amplifier is connected with the output end of the high-pass filter circuit;
the second end of the external feedback circuit is linked with the inverting input end of the first operational amplifier;
the positive phase input end of the first operational amplifier is connected with the first end of the second resistor, and the second end of the second resistor is grounded;
the second capacitor is connected in parallel to two ends of the second resistor.
3. The lightning optical radiation detector of claim 1, wherein the external feedback circuit comprises a first resistor and a first capacitor;
the first end of the first resistor is connected with the second end of the external feedback circuit, and the second end of the first resistor is connected with the first end of the external feedback circuit;
the first capacitor is connected in parallel to two ends of the first resistor.
4. The lightning optical detector of claim 1, wherein the signal amplification circuit comprises a second operational amplifier, a third resistor, a third capacitor and a fourth resistor;
the input end of the signal amplification circuit is connected with the first end of the third resistor;
the inverting input end of the second operational amplifier is connected with the second end of the third resistor and the first end of the third capacitor; the positive phase input end of the second operational amplifier is grounded;
the second end of the third capacitor is connected with the first end of the fourth resistor;
and the output end of the second operational amplifier is respectively connected with the second end of the fourth resistor and the output end of the signal amplification circuit.
5. The lightning optical radiation detector of claim 1, wherein the photo-sensor is a photodiode;
and the cathode of the photodiode is connected with the output end of the photoelectric sensor, and the anode of the photodiode is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921406991.8U CN210774350U (en) | 2019-08-27 | 2019-08-27 | Thunder and lightning optical radiation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921406991.8U CN210774350U (en) | 2019-08-27 | 2019-08-27 | Thunder and lightning optical radiation detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210774350U true CN210774350U (en) | 2020-06-16 |
Family
ID=71045047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921406991.8U Active CN210774350U (en) | 2019-08-27 | 2019-08-27 | Thunder and lightning optical radiation detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210774350U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115128332A (en) * | 2022-06-13 | 2022-09-30 | 国网江苏省电力有限公司苏州供电分公司 | Lightning detection auxiliary device and method based on optical signal detection |
-
2019
- 2019-08-27 CN CN201921406991.8U patent/CN210774350U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115128332A (en) * | 2022-06-13 | 2022-09-30 | 国网江苏省电力有限公司苏州供电分公司 | Lightning detection auxiliary device and method based on optical signal detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203629593U (en) | Detection circuit for optical fiber sensing weak signals | |
| JP2005265846A (en) | Color sensor canceling dark photocurrent | |
| CN108362377A (en) | A kind of Low Frequency Low Noise balanced homodyne detection device | |
| CN103398775A (en) | Light signal acquisition system based on photodiode | |
| CN102261953B (en) | Illuminance transducer | |
| CN210774350U (en) | Thunder and lightning optical radiation detector | |
| CN113138018A (en) | High signal-to-noise ratio broadband balance homodyne detector for quantum random number generation | |
| CN104697646B (en) | A kind of single photon counting discriminator circuit with dark counting pulse discrimination power | |
| CN103323110A (en) | Photoelectric detection control circuit | |
| CN204027698U (en) | A kind of photodetector with two-stage enlarging function | |
| CN218673908U (en) | Balanced photoelectric detector | |
| CN107966167B (en) | Optical signal receiving device and photoelectric detection equipment | |
| CN104677511B (en) | A kind of single photon counting discriminator circuit with threshold values automatic control function | |
| CN110332993A (en) | A kind of high speed is adjustable time domain impulse type balanced homodyne detector and its collecting method | |
| CN111106867A (en) | Detection module suitable for continuous variable quantum random number generation | |
| CN203259168U (en) | Special optical signal detection circuit | |
| JPH04252923A (en) | Photo detecting circuit | |
| EP3715803A1 (en) | Optical detection circuit | |
| CN203310514U (en) | Photoelectric detection and control circuit | |
| CN113670345A (en) | Low-noise photoelectric detection device for decomposing photocurrent signal | |
| CN209310835U (en) | A kind of detection device of optical sensor | |
| CN203502115U (en) | Signal amplification circuit of pyroelectric temperature measuring system | |
| CN110672203A (en) | Balanced photodetector | |
| CN205404857U (en) | Meteorological instrument leaks current detection system | |
| CN214793487U (en) | Photoelectric detection circuit with high signal-to-noise ratio |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |