CN107342744A - A kind of electric charge release circuit and ultraviolet light detection module for ultraviolet phototube - Google Patents
A kind of electric charge release circuit and ultraviolet light detection module for ultraviolet phototube Download PDFInfo
- Publication number
- CN107342744A CN107342744A CN201710514013.4A CN201710514013A CN107342744A CN 107342744 A CN107342744 A CN 107342744A CN 201710514013 A CN201710514013 A CN 201710514013A CN 107342744 A CN107342744 A CN 107342744A
- Authority
- CN
- China
- Prior art keywords
- ultraviolet light
- light sensing
- sensing tube
- electric charge
- resistance
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 title claims description 9
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/70—Charge amplifiers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/74—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of diodes
Abstract
The invention discloses a kind of electric charge release circuit for ultraviolet light sensing tube, it includes sampling resistor, amplifying circuit, decision unit and on-off circuit.Pass through the equivalent voltage on sampling resistor of the quantity of electric charge for accumulating ultraviolet light sensing tube, amplified circuit is amplified to the voltage on sampling resistor and obtains sampled signal, decision unit is according to the sampled signal, judge whether the electric charge of ultraviolet light sensing tube accumulation reaches given threshold, reach the given threshold and then export enable signal to on-off circuit, on-off circuit is connected the negative electrode and anode of the ultraviolet light sensing tube, and produce discharge current, so as to discharge the electric charge accumulated on the ultraviolet light sensing tube negative electrode.Therefore, the present invention can ultraviolet light sensing tube charge accumulated to a certain extent when, the electric charge accumulated on release ultraviolet light sensing tube, so as to avoid the charge accumulated phenomenon due to ultraviolet light sensing tube, increase the probability of ultraviolet light sensing tube background noise triggering, make the triggering of ultraviolet light sensing tube background noise be easier to influence ultraviolet testing result.
Description
Technical field
The present invention relates to ultraviolet technical field of light detection, the electric charge release circuit and purple of more particularly to a kind of ultraviolet phototube
Outer smooth detection module.
Background technology
There is the accumulation phenomenon of electric charge in ultraviolet light sensing tube, and the quantity of electric charge of the accumulation accumulates in the case of high voltage supply
After to a certain extent, will increase ultraviolet light sensing tube background noise triggering probability, simultaneously as background noise triggering there is
Uncertainty, easily ultraviolet testing result is impacted.Therefore, it is necessary to which a kind of technical scheme, can effectively be eliminated ultraviolet
The charge accumulated phenomenon of photosensitive tube, so as to reduce the probability of ultraviolet light sensing tube background noise triggering, ensure ultraviolet testing result
Accuracy.
The content of the invention
It is an object of the invention to：Solve the charge accumulated phenomenon that ultraviolet light sensing tube occurs in high voltage supply, can increase
The probability of ultraviolet light sensing tube background noise triggering, the triggering of ultraviolet light sensing tube background noise is set to be easier to influence ultraviolet testing result
Technical problem.
In order to realize foregoing invention purpose, the invention provides following technical scheme：
A kind of electric charge release circuit for ultraviolet light sensing tube, it includes,
The cathode terminal of sampling resistor, its one end ground connection, one end and ultraviolet light sensing tube connects；
Amplifying circuit, for being amplified to the voltage on the sampling resistor, and obtain sampled signal；
Decision unit, for according to the sampled signal, whether the quantity of electric charge for judging to accumulate on ultraviolet light sensing tube negative electrode to reach
To given threshold, if reaching the given threshold, enable signal is exported；
On-off circuit, under the triggering of enable signal control, connecting the negative electrode and anode of ultraviolet light sensing tube, and
Discharge current is produced, to discharge the electric charge accumulated on the ultraviolet light sensing tube negative electrode.
According to a kind of specific embodiment, the present invention is used in the electric charge release circuit of ultraviolet light sensing tube, the judgement
Unit is micro-control module, and the micro-control module obtains sampled data by carrying out A/D conversions to the sampled signal, and
Judge whether the sampled data reaches the given threshold, and when the sampled data reaches the given threshold, output
The enable signal.
According to a kind of specific embodiment, the present invention is used in the electric charge release circuit of ultraviolet light sensing tube, the amplification
Circuit includes operational amplifier U1, resistance R1 and resistance R2；Wherein, an input end grounding of the operational amplifier U1, its
Another input connects resistance R1 and resistance R2 one end, the resistance R2 other end and operational amplifier U1 output end respectively
Connection, the resistance R1 other end connect the sampling resistor, and operational amplifier U1 output end exports the sampled signal.
According to a kind of specific embodiment, the present invention is used in the electric charge release circuit of ultraviolet light sensing tube, the switch
Circuit includes triode Q1, resistance R3 and resistance R4；Wherein, input of the resistance R3 one end as enable signal, its is another
The individual base stage with triode Q1 is connected, and resistance R4 one end is connected with voltage source VCC, and the source electrode of its other end and triode Q1 connects
Connect, one end that triode Q1 emitter stage is grounded with the sampling resistor is connected.
Present invention also offers a kind of ultraviolet light detection module, the ultraviolet light detection module includes the present invention and is used for ultraviolet light
The electric charge release circuit of quick pipe.
Compared with prior art, beneficial effects of the present invention：The present invention is used in the electric charge release circuit of ultraviolet light sensing tube,
By the equivalent voltage on sampling resistor of the quantity of electric charge for accumulating ultraviolet light sensing tube, amplified circuit is to the electricity on sampling resistor
Pressure is amplified and obtains sampled signal, decision unit according to the sampled signal, judge ultraviolet light sensing tube accumulation electric charge whether
Reach given threshold, reach the given threshold and then export enable signal to on-off circuit, on-off circuit is connected this ultraviolet photosensitive
The negative electrode and anode of pipe, and discharge current is produced, so as to discharge the electric charge accumulated on the ultraviolet light sensing tube negative electrode.Therefore, this hair
It is bright can ultraviolet light sensing tube charge accumulated to a certain extent when, the electric charge that accumulates on ultraviolet light sensing tube is discharged, so as to avoid
Due to the charge accumulated phenomenon of ultraviolet light sensing tube, the probability of increase ultraviolet light sensing tube background noise triggering, make ultraviolet light sensing tube sheet
The situation that back noise triggering is easier to influence ultraviolet testing result occurs.
Brief description of the drawings：
Fig. 1 is the structural representation for the electric charge release circuit that the present invention is used for ultraviolet light sensing tube；
Fig. 2 is a kind of structural representation of embodiment of the present invention；
Embodiment
With reference to test example and embodiment, the present invention is described in further detail.But this should not be understood
Following embodiment is only limitted to for the scope of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that present invention is realized
The scope of invention.
The present invention with reference to shown in Fig. 1 is used for the structural representation of the electric charge release circuit of ultraviolet light sensing tube；Wherein, this hair
The bright electric charge release circuit for ultraviolet light sensing tube, it includes sampling resistor, amplifying circuit, decision unit and on-off circuit.
Wherein, the cathode terminal of one end ground connection of sampling resistor, its other end and ultraviolet light sensing tube connects.It is once ultraviolet photosensitive
After producing charge accumulated on the negative electrode of pipe, electrical potential difference will be formed between sampling resistor, that is, forms voltage.And amplifying circuit passes through
Voltage on sampling resistor is amplified, and obtains sampled signal, the sampled signal that amplifying circuit is obtained is exported to sentencing
Certainly unit.For decision unit according to the sampled signal, whether the quantity of electric charge for judging to accumulate on ultraviolet light sensing tube negative electrode reaches setting threshold
Value, if reaching the given threshold, exports enable signal to on-off circuit.On-off circuit controls in the triggering of enable signal
Under, the cathode terminal and anode tap of ultraviolet light sensing tube are connected, the negative electrode and anode for making ultraviolet light sensing tube produce discharge current, so as to release
Put the electric charge accumulated on ultraviolet light sensing tube negative electrode.
A kind of structural representation of embodiment of the invention with reference to shown in Fig. 2；Wherein, decision unit is micro-control molding
Block.Also, then micro-control module judges the hits by carrying out A/D conversions to the sampled signal to obtain sampled data
According to whether reaching given threshold, once the sampled data reaches given threshold, micro-control module then export an enable signal to
On-off circuit, make the on-off circuit connect ultraviolet light sensing tube cathode terminal and anode tap so that the negative electrode of ultraviolet light sensing tube and
Discharge current is produced between anode, discharges the electric charge accumulated on ultraviolet light sensing tube negative electrode.
Wherein, amplifying circuit includes operational amplifier U1, resistance R1 and resistance R2.Wherein, one of operational amplifier U1
Input end grounding, its another input connect resistance R1 and resistance R2 one end respectively, and resistance the R2 other end and computing are put
Big device U1 output end connection, the resistance R1 other end connect the sampling resistor, operational amplifier U1 output end output institute
State sampled signal.
On-off circuit includes triode Q1, resistance R3 and resistance R4；Wherein, resistance R3 one end is as the defeated of enable signal
Enter end, its another be connected with triode Q1 base stage, resistance R4 one end is connected with voltage source VCC, its other end and three poles
Pipe Q1 source electrode connection, one end that triode Q1 emitter stage is grounded with the sampling resistor is connected.
When micro-control module exports the base stage that enable signal reaches by resistance R2 triode Q1, make triode Q1 base stage
High level is produced, so as to turn-on transistor Q1.After triode Q1 conductings, the cathode terminal and anode tap of ultraviolet light sensing tube are connected, is made
Discharge current is produced between the negative electrode and anode of ultraviolet light sensing tube, and the discharge current flows into earth terminal through triode Q1.
Present invention also offers a kind of ultraviolet light detection module, the ultraviolet light detection module includes the present invention and is used for ultraviolet light
The electric charge release circuit of quick pipe.
Claims (5)
- A kind of 1. electric charge release circuit for ultraviolet light sensing tube, it is characterised in that including,The cathode terminal of sampling resistor, its one end ground connection, one end and ultraviolet light sensing tube connects；Amplifying circuit, for being amplified to the voltage on the sampling resistor, and obtain sampled signal；Decision unit, for according to the sampled signal, whether the quantity of electric charge for judging to accumulate on ultraviolet light sensing tube negative electrode, which reaches, to set Determine threshold value, if reaching the given threshold, export enable signal；On-off circuit, under the triggering of enable signal control, connecting the negative electrode and anode of ultraviolet light sensing tube, generation is put Electric current, discharge the electric charge accumulated on the ultraviolet light sensing tube negative electrode.
- 2. it is used for the electric charge release circuit of ultraviolet light sensing tube as claimed in claim 1, it is characterised in that the decision unit is Micro-control module, wherein, the micro-control module obtains sampled data by carrying out A/D conversions to the sampled signal, and Judge whether the sampled data reaches the given threshold, and when the sampled data reaches the given threshold, output The enable signal.
- 3. it is used for the electric charge release circuit of ultraviolet light sensing tube as claimed in claim 1, it is characterised in that the amplifying circuit bag Include operational amplifier U1, resistance R1 and resistance R2；Wherein, an input end grounding of the operational amplifier U1, its another Input connects resistance R1 and resistance R2 one end respectively, and the resistance R2 other end is connected with operational amplifier U1 output end, The resistance R1 other end connects the sampling resistor, and operational amplifier U1 output end exports the sampled signal.
- 4. it is used for the electric charge release circuit of ultraviolet light sensing tube as claimed in claim 1, it is characterised in that the on-off circuit bag Include triode Q1, resistance R3 and resistance R4；Wherein, input of the resistance R3 one end as enable signal, its another with three Pole pipe Q1 base stage connection, resistance R4 one end are connected with voltage source VCC, and its other end is connected with triode Q1 source electrode, and three One end that pole pipe Q1 emitter stage is grounded with the sampling resistor is connected.
- A kind of 5. ultraviolet light detection module, it is characterised in that including as described in one of Claims 1 to 4 be used for it is ultraviolet photosensitive The electric charge release circuit of pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710514013.4A CN107342744B (en) | 2017-06-29 | 2017-06-29 | Charge release circuit for ultraviolet phototube and ultraviolet light detection module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710514013.4A CN107342744B (en) | 2017-06-29 | 2017-06-29 | Charge release circuit for ultraviolet phototube and ultraviolet light detection module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107342744A true CN107342744A (en) | 2017-11-10 |
| CN107342744B CN107342744B (en) | 2023-08-15 |
Family
ID=60219137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710514013.4A Active CN107342744B (en) | 2017-06-29 | 2017-06-29 | Charge release circuit for ultraviolet phototube and ultraviolet light detection module |
Country Status (1)
| Country | Link |
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| CN (1) | CN107342744B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020140601A1 (en) * | 2019-01-02 | 2020-07-09 | 京东方科技集团股份有限公司 | Detection circuit, pattern recognition device and drive method |
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| JP2000180260A (en) * | 1998-12-15 | 2000-06-30 | Hamamatsu Photonics Kk | Integral type photodetector |
| JP2010199953A (en) * | 2009-02-25 | 2010-09-09 | Nec Corp | Optical reception circuit, optical reception device, and method of protecting optical reception circuit |
| CN202956186U (en) * | 2012-08-20 | 2013-05-29 | 上海电控研究所 | Ultraviolet photoelectric tube characteristic calibrating device |
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-
2017
- 2017-06-29 CN CN201710514013.4A patent/CN107342744B/en active Active
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| JP2000180260A (en) * | 1998-12-15 | 2000-06-30 | Hamamatsu Photonics Kk | Integral type photodetector |
| JP2010199953A (en) * | 2009-02-25 | 2010-09-09 | Nec Corp | Optical reception circuit, optical reception device, and method of protecting optical reception circuit |
| CN202956186U (en) * | 2012-08-20 | 2013-05-29 | 上海电控研究所 | Ultraviolet photoelectric tube characteristic calibrating device |
| CN104373952A (en) * | 2014-11-26 | 2015-02-25 | 天津安节特电子仪表有限公司 | Flame monitor |
| CN105703724A (en) * | 2016-01-30 | 2016-06-22 | 杨明 | Method for overcurrent protection of power device and circuit |
| CN105741788A (en) * | 2016-04-22 | 2016-07-06 | 青岛海信电器股份有限公司 | Backlight drive circuit and display apparatus |
| CN206164074U (en) * | 2016-09-09 | 2017-05-10 | 广州视源电子科技股份有限公司 | Power supply over -current protection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020140601A1 (en) * | 2019-01-02 | 2020-07-09 | 京东方科技集团股份有限公司 | Detection circuit, pattern recognition device and drive method |
| US11620848B2 (en) | 2019-01-02 | 2023-04-04 | Boe Technology Group Co., Ltd. | Detection circuit, skin print recognition device and driving method |
Also Published As
| Publication number | Publication date |
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| CN107342744B (en) | 2023-08-15 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210325 Address after: No.2-13, Shiyang Road, Yangma Town, Jianyang City, Chengdu, Sichuan 610000 Applicant after: Chengdu ultraviolet photoelectric technology Co.,Ltd. Address before: No. 333, Xingong Avenue, East Industrial District, Xindu, Chengdu, Sichuan 610500 Applicant before: CHENGDU XUGUANG ELECTRONIC EQUIPMENTS Co.,Ltd. |
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