CN106813776B - Multrirange optical detection device - Google Patents
Multrirange optical detection device Download PDFInfo
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- CN106813776B CN106813776B CN201611132113.2A CN201611132113A CN106813776B CN 106813776 B CN106813776 B CN 106813776B CN 201611132113 A CN201611132113 A CN 201611132113A CN 106813776 B CN106813776 B CN 106813776B
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- 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
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
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Abstract
The present invention relates to a kind of multrirange optical detection devices, including：The amplified signal of whole range control module reception amplifier output simultaneously judges that amplified signal whether in detection range ability, sends first voltage to gain amplifier control module, adjustment module and baseline setup module and controls signal.Peak detection feedback module detects amplified signal or the light detection baseline level of baseline setup module setting.Regulate signal is superimposed by voltage gain control module with temperature compensation signal, and controls signal to bias supply output second voltage.Bias supply generates bias voltage, and exports bias voltage to optical sensor.Optical sensor converts optical signal to be detected to electric signal.Gain amplifier control module generates gain control signal.Baseline setup module generates light detection baseline level.Temperature compensation module output temperature thermal compensation signal.The electric signal that amplifier exports optical sensor is amplified.The optical signal detecting of varying strength in a wide range of is realized by the technical solution.
Description
Technical field
The present invention relates to technical field of light detection, more particularly, to a kind of multrirange optical detection device.
Background technology
Optical signal detecting technology becomes the key technology in numerous engineer application fields, and wherein function near infrared spectrum is imaged skill
There is very high requirement to the detection of optical signal especially faint optical signal in art.Existing optical signal detecting device is mainly by biasing
Power supply, optical sensor and amplifying circuit composition, do not have light detection feedback and gain-adjusted function, although having very high inspection
Sensitivity is surveyed, but has certain voltage output limitation, the range of light intensity of detection is limited.In actual application, existing skill
Art frequently can lead to detection output signal saturation when encountering the big light intensity signal of variation range.So for the detection of different light intensity
Need to select the optical signal detecting device of different ranges or different sensitivity.Result caused by this way is exactly that whole device is even whole
The application range of a equipment is restricted.
In view of this, special propose the present invention.
Invention content
In view of the above-mentioned problems, the object of the present invention is to provide a kind of multrirange optical detection device, it can be achieved that in a wide range of not
With the optical signal detecting of intensity.
To achieve the goals above, following technical scheme is provided：
The present invention provides a kind of multrirange optical detection device.The device is anti-including whole range control module, peak detection
Present module, adjustment module, voltage gain control module, bias supply, optical sensor, gain amplifier control module, baseline setting
Module, temperature compensation module and amplifier；Wherein, whole range control module receives the feedback of peak detection feedback module output
Signal simultaneously judges amplified signal whether in detection range ability, if it is not, then receiving the electricity that peak detection feedback module feedback is come
Feedback signal is pressed, and sends first voltage to gain amplifier control module, adjustment module and baseline setup module and controls signal.Peak
The amplified signal of value detection feedback module detection amplifier output or the light detection baseline level of baseline setup module setting, and to
Whole range control module output voltage feedback signal.Adjustment module receives the first voltage control of whole range control module transfer
Signal processed, and to voltage gain control module output regulation signal.The adjusting that voltage gain control module exports adjustment module
Signal is superimposed with the temperature compensation signal that temperature compensation module exports, and controls signal to bias supply output second voltage.Partially
It sets power supply and receives second voltage control signal, and signal is controlled according to second voltage and generates bias voltage, and is defeated to optical sensor
Go out bias voltage.Optical sensor loads bias voltage, converts optical signal to be detected to electric signal, and electric signal is delivered to
Amplifier.The first voltage that gain amplifier control module receives whole range control module controls signal, generates gain control letter
Number, to control the gain of amplifier.The first voltage that baseline setup module receives whole range control module controls signal, and raw
At light detection baseline level.Temperature compensation module is to voltage gain control module output temperature thermal compensation signal.Amplifier reception is put
The gain control signal that large gain control module is sent, and the electric signal of optical sensor output is amplified, output amplification
Amplified signal is simultaneously delivered to whole range control module and peak detection feedback module by signal.The technical solution is increased by voltage
Benefit control optical sensor, controls amplifier, peak detection feedback module is fed back, entire amount by gain amplifier control module
Process control module determines whether to meet detection range, selects suitable entire gain by whole range control module, needed with matching
The light intensity signal to be detected, to realize the optical signal detecting of varying strength in a wide range of.
Description of the drawings
The case where Fig. 1 is detection signal according to embodiments of the present invention schematic diagram；
Fig. 2 is the structural schematic diagram of multrirange optical detection device according to the ... of the embodiment of the present invention；
Fig. 3 is that multrirange optical detection device according to the ... of the embodiment of the present invention carries out light detection schematic diagram.
Specific implementation mode
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining the technical principle of the present invention, it is not intended that limit the scope of the invention.
The central scope of the embodiment of the present invention is to control light optical sensor bias supply by voltage gain, passes through amplifier
Gain controls multistage amplifier circuit, and whether peak detection feedback entire gain meets detection range, by whole range control part
Suitable entire gain is selected, the light intensity signal for needing to detect with matching.
Fig. 1 schematically illustrates the main conditions of detection signal of the embodiment of the present invention：1. the light signal strength detected compared with
By force, light intensity changes greatly；2. the light intensity signal detected is stronger, light intensity variation is small；3. it is weaker to detect light intensity signal, light intensity variation
It is small.
Fig. 2 schematically illustrates a kind of structural schematic diagram of multrirange optical detection device.Wherein, the multrirange light detection
Device 200 may include：Whole range control module 201, peak detection feedback module 208, adjustment module 202, voltage gain
Control module 203, bias supply 204, optical sensor 205, gain amplifier control module 210, baseline setup module 207, temperature
Compensating module 206 and amplifier 209.Wherein, whole range control module 201 is defeated for receiving peak detection feedback module 208
The feedback signal that goes out simultaneously judges amplified signal whether in detection range ability, if it is not, then receiving peak detection feedback module 208
The voltage feedback signal that feedback is come, and sent to gain amplifier control module 210, adjustment module 202 and baseline setup module 207
First voltage controls signal.Peak detection feedback module 208 is used to detect the amplified signal and voltage is anti-of the output of amplifier 209
Feedback signal is transmitted to whole range control module 201.Adjustment module 202 is used to receive what whole range control module 201 was transmitted
First voltage controls signal, and to 203 output regulation signal of voltage gain control module.Voltage gain control module 203 is used for
The Regulate signal that adjustment module 202 exports is superimposed with the temperature compensation signal that temperature compensation module 206 exports, and to biased electrical
Source 204 exports second voltage and controls signal.Bias supply 204 controls signal for receiving second voltage, and according to second voltage
It controls signal and generates bias voltage, and bias voltage is exported to optical sensor 205.Optical sensor 205 is used to load bias voltage,
It converts optical signal to be detected to electric signal, and electric signal is delivered to amplifier 209.Gain amplifier control module 210 is used
Signal is controlled in the first voltage for receiving whole range control module 201, to control the gain of amplifier 209.Mould is arranged in baseline
Block 207 is used to receive the first voltage control signal of whole range control module 201, and generates light detection baseline level.Temperature
Compensating module 206 is used for output temperature thermal compensation signal.The electric signal that amplifier 209 is used to export optical sensor 205 is put
Greatly, it exports amplified signal and amplified signal is delivered to peak detection feedback module 208.
In the present embodiment, mould is arranged to adjustment module, gain amplifier control module and baseline in whole range control module
Block exports first voltage control signal respectively, receives the feedback signal of peak detection feedback fraction and judges the amplification letter of amplifier
Number whether detection range ability in, if it is not, then according to the peak detection feedback module feedback come voltage feedback signal, tune
Whole adjustment module, baseline setup module and gain amplifier control module and voltage gain control module, to redefine detection limit
Journey；Wherein, whole range control module receives the feedback information of peak detection feedback module feedback, and is adjusted according to feedback information
The gain level of each control section ensures effective output of the light detecting signal from amplifier；Light sensing is adjusted by adjustment module
The supply voltage of device is to change the sensitivity of optical sensor, to control light quantity journey detection range.Whole range control module is set
Determine baseline setup module, baseline setup module cooperation amplifier detects the setting of signal output baseline to realize, can be in detection
Output voltage is reduced when light intensity is higher, prevents from being saturated, to reflect higher light-intensity test value with smaller output voltage values.
Wherein, detection range ability can be configured according to actual conditions.
In the above-described embodiments, peak detection feedback module can specifically include voltage comparator circuit and feedback unit.Its
In, voltage comparator circuit is used to detect the light whether amplified signal of amplifier output is saturated or is arranged less than baseline setup module
Detect baseline level.Feedback unit is arranged in the amplified signal saturation that detects amplifier output or less than baseline setup module
In the case of light detection baseline level, to whole range control module output voltage feedback signal.
Voltage feedback signal is fed back to whole range control module by above-mentioned peak detection feedback module, and through gain amplifier
Control module and amplifier make the gain of amplifier meet detection range of light intensity to export effective detected value.Peak detection
Feedback module may insure the effective of light detecting signal.
In the above-described embodiments, adjustment module can specifically include analog regulation unit and digital regulated unit.Wherein, mould
Quasi- adjusting unit coordinates digital regulated unit to complete voltage gain control jointly by adjusting analog device manually, can conveniently make
User operates according to practical application.Whole range control module is also controlled by digital regulated unit, and through voltage gain
Module and bias supply, to adjust the supply voltage of optical sensor.
In the above-described embodiments, the Regulate signal and temperature compensation module that voltage gain control module exports adjustment module
The temperature compensation signal of output is superimposed, and controls signal to bias supply output second voltage, to adjust the biasing of bias supply
Voltage.The bias voltage that voltage gain control module can be such that bias supply exports meets the temperature changing regularity of optical sensor,
To ensure the stabilization of optical sensor gain, it is allowed to not be acted upon by temperature changes.
In the above-described embodiments, gain amplifier control module receives the first voltage control letter of whole range control module
Number, gain control signal is generated, to control the gain of amplifier, to control the amplified signal of amplifier output.
In the above-described embodiments, light detection baseline level is arranged in baseline setup module cooperation amplifier.In the light intensity of detection
When higher, baseline setup module reduces output voltage, prevents from being saturated, and can reflect that higher light intensity is examined with smaller output voltage values
Measured value.
In the above-described embodiments, temperature compensation module output temperature thermal compensation signal, it is ensured that the tune of optical sensor voltage
Section variation meets the trend that the sensitivity of optical sensor varies with temperature, output temperature thermal compensation signal.
Temperature compensation module can specifically include：Scaling circuit and addition and subtraction circuit and temperature sensor.Wherein,
Temperature sensor detects the temperature of optical sensor, obtains temperature signal, and temperature signal is converted to voltage signal, then pass through ratio
Example computing circuit and addition and subtraction circuit handle voltage signal, generate temperature compensation signal, then by temperature compensation signal
It is transmitted to voltage gain control module, then controls optical sensor so that the biasing voltage signal of optical sensor meets optical sensor
The rule that varies with temperature of sensitivity.
In the above-described embodiments, amplifier receives the gain control signal that gain amplifier control module is sent, and is passed to light
The electric signal of sensor output is amplified, and exports amplified signal and the amplified signal is delivered to peak detection feedback module.It is whole
Scale of construction process control module receives the voltage feedback signal of peak detection feedback module feedback, is exported to gain amplifier control module
First voltage controls signal, and gain amplifier control module controls the increasing that signal further controls amplifier by the first voltage
Benefit makes gain meet detection range of light intensity to export effective detected value.Preferably, amplifier is casacade multi-amplifier.
In the above-described embodiments, the control voltage signal that the transmission of bias supply receiving voltage gain control module comes, and to
Optical sensor exports bias voltage.So the size of bias voltage determines the sensitivity of light optical sensor.
In multrirange optical detection device provided in an embodiment of the present invention, whole range control module is to adjustment module, voltage
Gain control module, gain amplifier control module and baseline setup module distinguish output voltage control signal, receive peak detection
The feedback signal of feedback module simultaneously judges amplified signal whether in detection range ability according to feedback signal, if it is not, then adjusting
Digital regulated unit, baseline setup module and gain amplifier control module in adjustment module and voltage gain control module, with
Detection range is redefined, thereby ensures that effective output of light detecting signal.
Light detection amount is realized by three sensitivity of optical sensor, light detection baseline level and multistage amplification factor aspects
The determination of journey.If the light detection output signal saturation that peak detection feedback module detects, illustrates that optical detection measurement range is less than normal, then
Whole range control part by change export control Signal Regulation voltage gain control, baseline setting and gain amplifier control come
Change optical sensor sensitivity and multistage gain amplifier, improve baseline level, to increase corresponding range.If peak detection arrives
Light detection output signal be less than baseline level, illustrate that optical detection measurement range is bigger than normal, then whole range detection part makees opposite tune
It is whole to reduce range.Light detection exports always within the scope of effective in this way.And further, the embodiment of the present invention exists
Receive that control electricity can be exported according to adjusting while peak detection feedback module feeds back and adjusts voltage and the gain of amplifier
The size of pressure determines range of light intensity.
Fig. 3 schematically illustrates multrirange optical detection device and carries out light detection schematic diagram.Wherein, when different light intensity signals
When being irradiated to multrirange photodetector, detector can be according to the light intensity regulating irradiated to suitable range ability.If light intensity
Become larger and exceed existing range ability, then detector can reduce gain, increase range, it is ensured that output signal is effective.If light intensity becomes
Small, then detector can improve gain, reduce range.If light intensity signal is faint and changes small, detector can be carried further
Range is decreased to light intensity and corresponds to range by high-gain, utmostly improves sensitivity to detect the optical signal of faint variation.
Carry out the use for the multrirange optical detection device that the present invention will be described in detail embodiment proposes with a preferred embodiment below
Situation.Wherein, using casacade multi-amplifier, and adjustment module uses digital regulated unit and analog regulation unit.
In use, after optical sensor receives detected optical signal, whole range control module basis first
The output feedback information of peak detection feedback module judges whether current range meets detection demand.If detect light intensity it is larger and
The variation of light signal strength also it is larger to lead to current detection range deficiency when, then whole range control module passes through gain amplifier
Control module reduces the gain of casacade multi-amplifier and adjusts voltage gain control module by digital regulated unit to reduce light
The sensitivity of sensor, to make corresponding optical detection measurement range be enlarged to correspond with current light signal strength.If detecting light intensity
The variation of larger and light signal strength is smaller, then it is strong to reduce output signal by baseline setup module first for whole range control module
Degree judges current to avoid saturation, then whole range control module further according to the voltage feedback signal of peak detection feedback module
Whether range meets light signal strength variation range, if range is insufficient, continuing through gain amplifier control module reduces multistage
It the gain of amplifier and voltage gain control module is adjusted by digital regulated unit reduces the sensitivity of optical sensor, from
And increase range；The gain of casacade multi-amplifier is improved by gain amplifier control module if range is bigger than normal and is adjusted by number
Section unit adjusts voltage gain control module to improve the sensitivity of optical sensor, to reduce range, to ensure that optical signal is examined
The peak response of survey.If it is weaker to detect light intensity, whole range control module is improved more by gain amplifier control module
It the gain of grade amplifier and voltage gain control module is adjusted by digital regulated unit improves the sensitivity of optical sensor,
To make corresponding optical detection measurement range reduce so that overall sensitivity improves to greatest extent, to meet current light signal strength
Detection, while implementing to feed back by peak detection feedback module, final output signal ensures the effective of signal detection.Analog regulation
Unit can then be made by adjusting manual adjusting and calibration of the voltage gain control module realization to detection range and sensitivity
With more convenient in the process.
It will be understood by those skilled in the art that above-mentioned multrirange optical detection device embodiment can also include some other
Known features, such as processor, controller, memory and bus etc., wherein memory include but not limited to random access memory,
It is flash memory, read-only memory, programmable read only memory, volatile memory, nonvolatile memory, serial storage, parallel
Memory or register etc., processor include but not limited to single core processor, multi-core processor, the processor based on X86-based,
CPLD/FPGA, DSP, arm processor, MIPS processors etc., bus may include data/address bus, address bus and controlling bus.
In order to unnecessarily obscure embodiment of the disclosure, these well known structures are not shown in FIG. 2.
It can mutually be referred between the various embodiments described above, details are not described herein.
So far, it has been combined preferred embodiment shown in the drawings and describes technical scheme of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific implementation modes.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make the relevant technologies feature equivalent change or replacement, these
Technical solution after change or replacement is fallen within protection scope of the present invention.
Claims (4)
1. a kind of multrirange optical detection device, which is characterized in that described device includes：Whole range control module, peak detection
Feedback module, adjustment module, voltage gain control module, bias supply, optical sensor, gain amplifier control module, baseline are set
Set module, temperature compensation module and amplifier；Wherein：
The peak detection feedback module, amplified signal for detecting amplifier output and to the whole range control
Module output voltage feedback signal；
The entirety range control module, for receiving described in the feedback signal and judgement that the peak detection feedback module exports
Whether amplified signal is in detection range ability, if it is not, then receiving the Voltage Feedback that the peak detection feedback module feedback is come
Signal, and send first voltage control to the gain amplifier control module, the adjustment module and the baseline setup module
Signal；
The adjustment module, the first voltage control signal for receiving the whole range control module transfer, and to
The voltage gain control module output regulation signal；
The voltage gain control module, the Regulate signal and the temperature compensation module for exporting the adjustment module are defeated
The temperature compensation signal superposition gone out, and control signal to bias supply output second voltage；
The bias supply controls signal for receiving the second voltage, and controls signal according to the second voltage and generate
Bias voltage, and export the bias voltage to the optical sensor；
The optical sensor converts optical signal to be detected to electric signal for loading the bias voltage, and by the electricity
Signal is delivered to the amplifier；
The gain amplifier control module, the first voltage for receiving the whole range control module control signal,
Gain control signal is generated, to control the gain of the amplifier；
The baseline setup module, the first voltage for receiving the whole range control module control signal, and raw
At light detection baseline level；
The temperature compensation module is used for the voltage gain control module output temperature thermal compensation signal；
The amplifier, the gain control signal sent for receiving the gain amplifier control module, and to described
The electric signal of optical sensor output is amplified, and exports amplified signal and the amplified signal is delivered to the peak value and examine
Survey feedback module.
2. multrirange optical detection device according to claim 1, which is characterized in that the peak detection feedback module is specific
Including：
Whether voltage comparator circuit, the amplified signal for detecting the amplifier output are saturated or mould are arranged less than the baseline
The light detection baseline level of block setting；
Feedback unit is arranged in the amplified signal saturation for detecting amplifier output or less than the baseline setup module
In the case of the light detection baseline level, the voltage feedback signal is exported to the whole range control module.
3. multrirange optical detection device according to claim 1, which is characterized in that the temperature compensation module is specifically wrapped
It includes：Scaling circuit and addition and subtraction circuit and temperature sensor；Wherein：
The temperature sensor detects the temperature of the optical sensor, obtains temperature signal, and the temperature signal is converted to
Voltage signal；
The scaling circuit and the addition and subtraction circuit, handle the voltage signal, generate the temperature and mend
Signal is repaid, and the temperature compensation signal is transmitted to the voltage gain control module.
4. multrirange optical detection device according to claim 1, which is characterized in that the amplifier is casacade multi-amplifier.
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| CN201611132113.2A CN106813776B (en) | 2016-12-09 | 2016-12-09 | Multrirange optical detection device |
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| US10648857B2 (en) * | 2018-04-10 | 2020-05-12 | Honeywell International Inc. | Ultraviolet flame sensor with programmable sensitivity offset |
| US11137309B2 (en) * | 2019-08-16 | 2021-10-05 | Sensata Technologies, Inc. | Strain gauge type pressure sensing |
| CN113702397A (en) * | 2020-05-20 | 2021-11-26 | 深圳中科飞测科技股份有限公司 | Optical detection system and optical detection method |
| CN116429250B (en) * | 2023-06-14 | 2023-10-13 | 深圳深浦电气有限公司 | Photoelectric detection circuit, photoelectric detection method, and photoelectric sensor |
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| CN105737977A (en) * | 2016-04-15 | 2016-07-06 | 博创科技股份有限公司 | Wide-range optical power meter |
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