CN114577240A - Method, system and sensor for dynamically adjusting photoelectric detection parameters - Google Patents
Method, system and sensor for dynamically adjusting photoelectric detection parameters Download PDFInfo
- Publication number
- CN114577240A CN114577240A CN202111562374.9A CN202111562374A CN114577240A CN 114577240 A CN114577240 A CN 114577240A CN 202111562374 A CN202111562374 A CN 202111562374A CN 114577240 A CN114577240 A CN 114577240A
- Authority
- CN
- China
- Prior art keywords
- value
- clutter
- signal
- voltage
- interference
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000001514 detection method Methods 0.000 title abstract description 18
- 238000005070 sampling Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000001429 visible spectrum Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
-
- 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
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0488—Optical or mechanical part supplementary adjustable parts with spectral filtering
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The application discloses a method, a system and a sensor for dynamically adjusting photoelectric detection parameters, wherein the method comprises the following steps: receiving a pulse signal in real time; based on the pulse signals, data acquisition is carried out; judging whether clutter interference exists or not based on the acquired data; when clutter interference exists, adjusting a judgment threshold value based on a clutter signal; through the scheme, the reference level and the hysteresis of the comparator can be dynamically adjusted in real time, so that the influence of LED light interference on the sensor is eliminated.
Description
Technical Field
The application relates to the field of photoelectric sensors, in particular to a method for dynamically adjusting photoelectric detection parameters.
Background
With the popularization of LEDs and the like, photoelectric sensors work more and more in the LED environment. The light emitted by the LED is visible spectrum, when the photoelectric sensor uses red light source, the spectra of the LED and the red light source are overlapped, so that the LED interference can not be filtered from the spectrum for the red photoelectric sensor. The pulse width emitted by the photoelectric sensor is generally within 1-5us, namely within 200K-1M bandwidth, the power frequency of the LED is about dozens of K to 100Khz, the bandwidths of the LED and the LED are overlapped, and because the two bandwidths are adjacent and close, a filter with a steep transition band is difficult to distinguish the two bandwidths, so the LED can cause interference to the photoelectric sensor.
In the time domain, the signal is superimposed on the interference signal, and when the signal is at the peak, the signal voltage is the highest, and when the signal is at the trough, the signal is the lowest, and the whole highest and lowest difference is determined by the peak-trough value of the interference signal. In terms of judgment, if the peak is located, the target may be judged to be present, and if the trough is located, the target is judged to be absent, which shows that the target and the non-target are judged back and forth, and the output jitter is caused.
Disclosure of Invention
The purpose of the application is to eliminate the influence of clutter interference on the detection of the photosensor.
The technical purpose of the application is realized by the following technical scheme:
a method for dynamically adjusting a photodetecting parameter, comprising:
receiving a pulse signal in real time;
data acquisition is carried out based on the pulse signals;
judging whether clutter interference exists or not based on the acquired data;
when clutter interference is present, the decision threshold is adjusted based on the clutter signal.
According to the scheme, whether clutter exists or not is judged by carrying out data acquisition, and when the clutter exists, the threshold value is judged by carrying out dynamic adjustment to offset the influence of optical interference signals, so that the detection efficiency and the precision are improved, and the shaking is avoided.
Optionally, in the method for dynamically adjusting the photodetection parameters, in the step of performing data acquisition based on the pulse signal, data acquisition is performed through the ADC.
According to the scheme, conversion from analog signals to digital signals is achieved through the ADC, fundamental wave levels are collected, stability of data collection is guaranteed, and follow-up judgment and comparison are facilitated.
Optionally, the method for dynamically adjusting the photodetection parameters includes, based on the pulse signal, a method for acquiring data that includes:
a plurality of data points are acquired according to a predetermined sampling period and ADC acquisition speed.
According to the scheme, the data points can be collected according to the preset sampling period and the preset collecting speed, and the efficiency of the collected data points and the accuracy of the collected data are improved.
Optionally, the method for dynamically adjusting the photoelectric detection parameter, wherein the method for determining whether clutter interference exists based on the acquired data includes:
sorting the collected data according to size;
acquiring a preset number of data ranked in the front, and calculating an average value D1;
calculating a difference value based on the average value D1 and the DC offset value D2;
when the difference is smaller than the lower threshold, judging that no clutter interference exists;
when the difference value is larger than the upper limit threshold value, judging that clutter interference exists;
and when the difference value is between the lower limit threshold value and the upper limit threshold value, maintaining the last judgment result.
According to the scheme, whether the clutter exists or not is judged by comparing the average value of the acquired large data with the direct current offset value, and whether the judgment threshold value needs to be adjusted or not is judged based on whether the clutter exists or not.
Optionally, the method for dynamically adjusting the photodetection parameter, wherein when there is clutter interference, the method for adjusting the determination threshold based on the clutter signal includes:
acquiring a wave peak Vdiff deviating from direct current bias;
and calculating a voltage high threshold Vth _ high = Vdc + Vdif + Vhys, wherein Vdc is a direct current bias voltage, and Vhys is a hysteresis voltage.
According to the scheme, the voltage high threshold is obtained by obtaining the wave crest deviating from the direct current bias, and the voltage high threshold is based on the wave crest deviating from the direct current bias, so that the influence of the optical interference signal can be counteracted.
Optionally, the method for dynamically adjusting the photodetection parameter further includes:
and verifying whether the voltage high threshold is reasonable or not, if the voltage high threshold is reasonable, keeping the voltage high threshold, and if the voltage high threshold is unreasonable, turning off the sensor to judge an alarm.
According to the scheme, whether the high voltage threshold is reasonable or not is verified, and the detection stability and precision of the sensor are further guaranteed.
Optionally, the method for dynamically adjusting the photodetection parameter further includes:
acquiring the highest voltage value output by the DAC;
when the highest voltage value is larger than Vth _ high, the reserved voltage is high in threshold value;
and when the highest voltage value is less than Vth _ high, the sensor is closed to judge an alarm.
According to the scheme, the maximum voltage value output by the DAC is compared, whether the maximum voltage value is reasonable or not is judged, the detection precision of the sensor is guaranteed, the fact that light interference signals are too strong is avoided, and the detection result of the sensor is not credible.
In another aspect of the present application, a system for dynamically adjusting photodetection parameters is disclosed, wherein the system comprises:
a processor for receiving and transmitting the pulse signal;
an amplifier for increasing the amplitude or power of the pulse signal;
the ADC is used for acquiring a fundamental wave level;
a DAC for outputting a reference comparison level;
a comparator for comparing the collected level with a comparison level;
when the comparator compares the interference of the fundamental wave level collected by the ADC, the reference level is dynamically adjusted by the DAC.
According to the scheme, the treater is responsible for transmitting pulse signal, receives pulse signal, control DAC, the comparator is responsible for the comparison of signal and reference level, ADC is responsible for gathering the fundamental wave level, DAC is responsible for exporting reference comparison level, through carrying out data acquisition, judge whether there is the clutter, when there is the clutter, carry out dynamic adjustment and judge the threshold value, offset the influence of light interference signal to detection efficiency and precision have been improved, the shake is avoided appearing.
Optionally, in the system for dynamically adjusting the photodetection parameter, when the maximum voltage threshold output by the processor is greater than the maximum voltage value output by the DAC, the processor sends a modulation signal, and the sensor is turned off to determine an alarm.
According to the scheme, the maximum voltage value output by the DAC is compared, whether the maximum voltage value is reasonable or not is judged, the detection precision of the sensor is guaranteed, the fact that light interference signals are too strong is avoided, and the detection result of the sensor is not credible.
In another aspect of the present application, a sensor is disclosed, wherein the system for dynamically adjusting photodetection parameters according to the foregoing aspect is included.
In summary, the present application discloses a method, a system and a sensor for dynamically adjusting a photodetection parameter, wherein the method comprises: receiving a pulse signal in real time; data acquisition is carried out based on the pulse signals; judging whether clutter interference exists or not based on the acquired data; when clutter interference exists, adjusting a judgment threshold value based on a clutter signal; through the scheme, the reference level and the hysteresis of the comparator can be dynamically adjusted in real time, so that the influence of LED light interference on the sensor is eliminated.
Drawings
FIG. 1 is a flow chart illustrating the steps of a method for dynamically adjusting photodetection parameters according to the present application.
FIG. 2 is a time-domain flow chart of an echo signal according to a preferred embodiment of the method for dynamically adjusting photodetection parameters described in the present application.
Fig. 3 is a schematic diagram of a system for dynamically adjusting photodetection parameters according to the present application.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
In order to solve the optical signal interference of the photoelectric sensor, the embodiment of the present application specifically discloses a method for dynamically adjusting a photoelectric detection parameter, which refers to fig. 1, which is a flow chart of steps of the method, wherein the method includes:
s1, receiving a pulse signal in real time;
s2, data acquisition is carried out based on the pulse signals;
s3, judging whether clutter interference exists or not based on the acquired data;
and S4, when clutter interference exists, adjusting a judgment threshold value based on the clutter signal.
The embodiment of the application, the sensor sends detected signal, receive the pulse signal that returns in real time, need to judge whether there is clutter interference, when there is not clutter interference, ordinary pulse modulation generally adopts fixed comparative level, surpass the threshold value when echo signal, the comparison will output a signal, judge whether there is the target to exist, and when there is clutter interference, echo signal can superpose on interference signal, so judge when echo signal surpasses the threshold value, probably because interference signal's existence, lead to the misjudgment, therefore, need carry out filtering process, carry out the filtering to interference wave, and the sensor can't follow the spectrum filtering LED interference, in the embodiment of the application, according to different clutter interference, judge the threshold value through dynamic adjustment, realize removing the interference of clutter.
In the foregoing solution, data acquisition is performed based on a pulse signal, and in order to ensure stability and efficiency of data acquisition, in this embodiment of the application, the method for dynamically adjusting the photodetection parameters is described, wherein in the step of performing data acquisition based on a pulse signal, data acquisition is performed through an ADC.
In the embodiment of the present application, data acquisition is preferably performed by an ADC.
In the embodiment of the present application, the whole process of receiving the echo signal by the sensor includes three parts, referring to fig. 2, which is a time-domain-based flowchart of the echo signal, specifically including an interference monitoring region, a processing window region, and an effective window region.
The interference monitoring zone is a zone that detects reflected signals that fall outside the emission window and, if there is a signal in this zone, is necessarily an interfering signal.
The processing window region is the data of the interference monitoring in front of the oscillation to be processed, and then the parameters are adjusted to detect the signal of the next effective window region.
The active window region is used to detect the reflected signal that falls within the emission window, which may contain interference clutter.
Therefore, in the specific implementation process, if there is a reflection signal in the interference monitoring area, it is directly determined that there is an interference signal, the determination threshold needs to be adjusted, and there is no reflection signal in the interference monitoring area, the signal in the effective window area may also have an interference clutter, because of the time domain, the signal in the effective window may pass through the interference monitoring area, therefore, the interference monitoring area starts to enter the interference monitoring area after completing the last transmission signal, the ADC is started to perform data acquisition, in order to better obtain the peak value of the signal, we need a higher-speed ADC, for example, more than 1Mbps, i.e., it needs 1 microsecond to acquire one data, it is assumed that the interference wave is 100KHZ, one cycle is 10 microseconds, at least 10 data points can be obtained, the lower the frequency of the interference wave is, the obtained data is also more, and the obtained peak value point is also more accurate. The monitoring window can be controlled to be over 100us and can be increased according to different emission periods.
Therefore, based on the above scheme, in the embodiment of the present application, the method for dynamically adjusting the photodetection parameters includes:
a plurality of data points are acquired according to a predetermined sampling period and ADC acquisition speed.
In the embodiment of the application, different sampling periods and ADC (analog to digital converter) acquisition speeds can be set to acquire a plurality of data points.
After acquiring a plurality of data points, it is necessary to analyze whether clutter interference exists according to the data points, which has been mentioned in the foregoing embodiment, the interference monitoring area is used to collect data, and after the data is collected, the data enters the processing window area, and the processing window area is used to analyze whether clutter interference exists. Specifically, the method for dynamically adjusting the photoelectric detection parameters includes the following steps of, based on the collected data, determining whether clutter interference exists:
sorting the collected data according to size;
acquiring a preset number of data ranked in the front, and calculating an average value D1;
calculating a difference value based on the average value D1 and the DC offset value D2;
when the difference is smaller than the lower threshold, judging that no clutter interference exists;
when the difference value is larger than the upper limit threshold value, judging that clutter interference exists;
and when the difference value is between the lower limit threshold value and the upper limit threshold value, maintaining the last judgment result.
In the embodiment of the application, carry out the analysis to the data of gathering, judge whether there is clutter interference, specifically include:
1. all the data are sorted from big to small, and the data in the first three are averaged to obtain data D1.
And 2, judging with the direct current bias value D2, and judging that no clutter interference exists if D1-D2 < Th1 (Th 1 is a threshold value) indicates that the maximum value of the acquired data is also close to the direct current bias.
And if D1-D2 > Th2 (Th 2 is a threshold value), the maximum value of the acquired data is more than the DC offset, and the clutter interference is judged.
Th1 and Th2 are threshold values respectively, Th1< Th2 can be set, and a certain difference exists between the threshold values to ensure that the two states are not switched back and forth to cause misjudgment in critical time. When D1-D2 falls between Th1 and Th2, the judgment can be ignored, and the last judgment result is maintained.
The foregoing solution has mentioned, through ADC data collection, whether the analysis has clutter interference, when there is clutter interference, needs dynamic adjustment to judge the threshold value, specifically, the method of dynamic adjustment photoelectric detection parameter, wherein, when there is clutter interference, based on clutter signal, the method of adjusting the judgment threshold value includes:
acquiring a wave crest Vdiff deviating from direct current bias;
the voltage high threshold Vth _ high = Vdc + Vdif + Vhys is calculated, where Vdc is a dc bias voltage and Vhys is a hysteresis voltage.
In the embodiment of the application, when an interference signal is judged to exist, firstly, a peak Vdif deviating from direct current bias can be directly obtained, and the amplitude of a signal superposed on the interference wave is assumed to be Vsignal;
the highest signal value Vmax = Vsignal + Vdc + Vdif of the echo signal;
the lowest signal value Vmin = Vsignal + Vdc-Vdif;
so in case of a disturbance the amplitude difference Vsd = 2 Vdif of the same signal.
Therefore, to ensure that the determination result is not jittered, the hysteresis required to set the comparison level signal needs to be greater than 2 Vdif.
Specific threshold values are set as follows:
first, in the case of no clutter interference:
a Low threshold Vth _ Low = Vdc + Voffset, which is a determination threshold;
a high threshold Vth _ high = Vth _ Low + Vhys = Vdc + Voffset + Vhys, Vhys being a hysteresis voltage;
when there is clutter interference, it is necessary to ensure that the signal-to-noise ratio is sufficient, i.e. the lowest amplitude of the signal must also be higher than the noise (clutter), and the amplitude of the noise is Vnoise = Vdc + Vdif, so:
a Low threshold value Vth _ Low = Vnoise + Voffset = Vdc + Vdif + Voffset, and Voffset is a determination threshold value;
the high threshold Vth _ high = Vth _ Low + 2 × Vdif + Vhys, which is a hysteresis voltage.
When the peak of the echo signal is greater than the high threshold, it indicates that there is an object, and in the previous processing scheme, the peak of the echo signal may be greater than the peak value of the actual echo signal due to the presence of the interference signal, so that the influence of the optical interference signal can be eliminated by the above scheme.
Therefore, according to the above mode, when the clutter interference exists, the voltage high threshold value can be dynamically adjusted, so that misjudgment caused by the clutter interference can be reduced.
In this embodiment, the method for dynamically adjusting the photodetection parameters further includes:
and verifying whether the voltage high threshold is reasonable or not, if the voltage high threshold is reasonable, keeping the voltage high threshold, and if the voltage high threshold is unreasonable, turning off the sensor to judge an alarm.
Further, the method for dynamically adjusting the photodetection parameters further includes:
acquiring the highest voltage value output by the DAC;
when the highest voltage value is larger than Vth _ high, the reserved voltage is high in threshold value;
and when the highest voltage value is less than Vth _ high, the sensor is closed to judge an alarm.
In the embodiment of the application, when the threshold is determined, the next step is to judge whether the threshold is reasonable. For the fact that the output of the DAC has the highest voltage Vdac _ max, if Vdac _ max is smaller than Vth _ high, it can be determined that the interference signal is too strong at this time, so that the signal to noise ratio is insufficient, the judgment result at this time is not credible, and the judgment alarm needs to be turned off.
Based on the scheme, whether interference exists or not is judged according to the ADC value, and then the threshold value and the hysteresis are adjusted and modified through the DAC, so that misjudgment and jitter output can not occur under the interference condition.
Another embodiment of the present application discloses a system for dynamically adjusting photodetection parameters, referring to fig. 3, which is a schematic structural diagram of the system, wherein the system includes:
a processor for receiving and transmitting the pulse signal;
an amplifier for increasing the amplitude or power of the pulse signal;
the ADC is used for acquiring a fundamental wave level;
a DAC for outputting a reference comparison level;
a comparator for comparing the collected level with a comparison level;
when the comparator compares the interference of the fundamental wave level collected by the ADC, the reference level is dynamically adjusted by the DAC.
The system for dynamically adjusting the photoelectric detection parameters comprises a processor, a DAC and a sensor, wherein the processor is used for outputting a maximum voltage threshold value, and the DAC outputs a maximum voltage value.
The system consists of a small signal amplifying circuit, a comparator, a DAC, a processor and the like. The processor is responsible for transmitting the pulse signal, receiving the pulse signal, controlling the DAC and controlling the time window. The comparator is responsible for the comparison of signal and reference level, and the ADC is responsible for gathering the fundamental wave level, and DAC is responsible for exporting and consults the comparison level.
In the embodiment of this application, pulse signal passes through the amplifier and enlargies the back, carries out data acquisition through the ADC, carries out comparative analysis through the comparator to the data of gathering and DAC's comparative level, judges whether there is clutter interference, specifically includes:
1. all the data are sorted from big to small, and the data in the first three are averaged to obtain data D1.
And 2, judging with the direct current bias value D2, and judging that no clutter interference exists if D1-D2 < Th1 (Th 1 is a threshold value) indicates that the maximum value of the acquired data is also close to the direct current bias.
And if D1-D2 > Th2 (Th 2 is a threshold value), the maximum value of the acquired data is more than the DC offset, and the clutter interference is judged.
Th1 and Th2 are threshold values respectively, Th1< Th2 can be set, and a certain difference exists between the Th1 and the Th2, so that the situation that misjudgment is caused by switching between two states back and forth in critical time is avoided. When D1-D2 falls between Th1 and Th2, the judgment can be ignored, and the last judgment result is maintained.
When the existence of the clutter is judged, the DAC is required to be controlled to dynamically output the reference comparison level, and the clutter interference is reduced.
When there is clutter interference, it is necessary to ensure that the signal-to-noise ratio is sufficient, i.e. the lowest amplitude of the signal must also be higher than the noise (clutter), and the amplitude of the noise is Vnoise = Vdc + Vdif, so:
a Low threshold Vth _ Low = Vnoise + Voffset = Vdc + Vdif + Voffset, and Voffset is a determination threshold;
the high threshold Vth _ high = Vth _ Low + 2 × Vdif + Vhys, which is a hysteresis voltage.
When the peak of the echo signal is greater than the high threshold, it indicates that there is an object, and in the previous processing scheme, the peak of the echo signal may be greater than the peak value of the actual echo signal due to the presence of the interference signal, so that the influence of the optical interference signal can be eliminated by the above scheme.
For the DAC output with a highest voltage Vdac _ max, if Vdac _ max is less than Vth _ high, the judgment result at the time can be unreliable due to the fact that the interference signal is too strong and the signal to noise ratio is insufficient, and the processor outputs a modulation signal to control the photoelectric sensor to stop alarming.
In another embodiment of the present application, a sensor is disclosed, wherein the system for dynamically adjusting photodetection parameters according to the foregoing scheme is included. After the sensor comprises the system, the method steps for dynamically adjusting the photoelectric detection parameters in the scheme can be realized.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A method for dynamically adjusting photodetection parameters, comprising:
receiving a pulse signal in real time;
data acquisition is carried out based on the pulse signals;
judging whether clutter interference exists or not based on the acquired data;
when clutter interference is present, the decision threshold is adjusted based on the clutter signal.
2. The method of claim 1, wherein the step of performing data acquisition based on the pulse signal comprises performing data acquisition via an ADC.
3. The method of dynamically adjusting photodetection parameters according to claim 2, characterized in that, based on the pulse signal, the method of data acquisition comprises:
a plurality of data points are acquired according to a predetermined sampling period and ADC acquisition speed.
4. The method of claim 3, wherein the step of determining whether clutter interference is present based on the collected data comprises:
sorting the collected data according to size;
acquiring a preset number of data ranked in the front, and calculating an average value D1;
calculating a difference value based on the average value D1 and the DC offset value D2;
when the difference value is smaller than the lower limit threshold value, judging that no clutter interference exists;
when the difference value is larger than the upper limit threshold value, judging that clutter interference exists;
and when the difference value is between the lower limit threshold value and the upper limit threshold value, maintaining the last judgment result.
5. The method of claim 3, wherein the step of adjusting the decision threshold based on the clutter signal when the clutter interference is present comprises:
acquiring a wave crest Vdiff deviating from direct current bias;
the voltage high threshold Vth _ high = Vdc + Vdif + Vhys is calculated, where Vdc is a dc bias voltage and Vhys is a hysteresis voltage.
6. The method of dynamically adjusting photodetection parameters according to claim 5, characterized in that it further comprises:
and verifying whether the voltage high threshold is reasonable or not, if the voltage high threshold is reasonable, keeping the voltage high threshold, and if the voltage high threshold is unreasonable, turning off the sensor to judge an alarm.
7. The method of dynamically adjusting photodetection parameters according to claim 6, characterized in that it further comprises:
acquiring the highest voltage value output by the DAC;
when the highest voltage value is larger than Vth _ high, keeping the voltage to be a high threshold value;
and when the highest voltage value is less than Vth _ high, the sensor is closed to judge an alarm.
8. A system for dynamically adjusting a photodetecting parameter, comprising:
a processor for receiving and transmitting the pulse signal;
an amplifier for increasing the pulse signal amplitude or power;
the ADC is used for acquiring a fundamental wave level;
a DAC for outputting a reference comparison level;
a comparator for comparing the collected level with a comparison level;
when the comparator compares the interference of the fundamental wave level collected by the ADC, the reference level is dynamically adjusted by the DAC.
9. The system for dynamically adjusting photodetection parameters according to claim 8, characterized in that when the highest voltage threshold value outputted by the processor is larger than the highest voltage value outputted by the DAC, the processor sends a modulation signal to turn off the sensor to determine the alarm.
10. A sensor comprising a system for dynamically adjusting a photodetecting parameter according to any of claims 8-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111562374.9A CN114577240A (en) | 2021-12-20 | 2021-12-20 | Method, system and sensor for dynamically adjusting photoelectric detection parameters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111562374.9A CN114577240A (en) | 2021-12-20 | 2021-12-20 | Method, system and sensor for dynamically adjusting photoelectric detection parameters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114577240A true CN114577240A (en) | 2022-06-03 |
Family
ID=81772296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111562374.9A Pending CN114577240A (en) | 2021-12-20 | 2021-12-20 | Method, system and sensor for dynamically adjusting photoelectric detection parameters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114577240A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116673278A (en) * | 2023-08-03 | 2023-09-01 | 上海科闫系统科技有限公司 | Electric pulse water treatment interference signal detection and treatment method |
-
2021
- 2021-12-20 CN CN202111562374.9A patent/CN114577240A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116673278A (en) * | 2023-08-03 | 2023-09-01 | 上海科闫系统科技有限公司 | Electric pulse water treatment interference signal detection and treatment method |
| CN116673278B (en) * | 2023-08-03 | 2023-10-13 | 上海科闫系统科技有限公司 | Electric pulse water treatment interference signal detection and treatment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| USRE49950E1 (en) | Distance detection method and system | |
| US8902409B2 (en) | Optoelectric sensor and a method for the detection and distance determination of objects | |
| CN111983586B (en) | Control method and control system of photoelectric detector and laser radar | |
| WO2012061198A1 (en) | System and method for detection of objects within selected region of space | |
| CN114577240A (en) | Method, system and sensor for dynamically adjusting photoelectric detection parameters | |
| CN108245174B (en) | A kind of the analog circuit front-end module and detection method of reflecting light Power Capacity wave | |
| US10061034B2 (en) | Signal processing device and noise strength determining method | |
| US5369269A (en) | Human body detection system | |
| FR2787987A1 (en) | METHOD AND DEVICE FOR DETECTING CONDUCTIVE FAULTS IN A TELEMETRIC BIOMEDICAL SYSTEM | |
| JPH08129067A (en) | Apparatus and method for measuring distance and capable of estimating weather condition | |
| CN114545383B (en) | High-anti-interference-capability X-band adjustable radar sensing method and system | |
| CN109639280A (en) | Have both the optical sampling circuit and acquisition method of sampling width and precision | |
| CN205120534U (en) | Dust detection device | |
| CN114401526A (en) | Narrow-band interference position detection method and system based on double-threshold judgment | |
| JP4284031B2 (en) | Flow cytometer | |
| US10281614B2 (en) | Circuit arrangement and method for disturber detection | |
| CN111551951A (en) | Laser Doppler velocimeter capable of automatically adjusting signal size and signal size control strategy thereof | |
| US8803065B2 (en) | Light barrier and method for pulsed operation in which the incidence of extraneous light on the detector can be detected and compensated for | |
| WO2021175395A1 (en) | System and method for accurate motion detection | |
| CN217424552U (en) | Signal acquisition device and detection system | |
| CN219064695U (en) | Avalanche signal discrimination system based on infrared single photon detector | |
| CN218003716U (en) | Light receiving circuit and device | |
| CN114706391A (en) | Anti-interference infrared obstacle avoidance method and device and storage medium | |
| JPH02189090A (en) | Automatic white balance circuit | |
| CN115097477A (en) | Photon number-resolved single photon laser radar and method for acquiring target track in real time |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |