CN109307550A - A kind of temperature-compensation method improving light power meter stability - Google Patents
A kind of temperature-compensation method improving light power meter stability Download PDFInfo
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- CN109307550A CN109307550A CN201811357346.1A CN201811357346A CN109307550A CN 109307550 A CN109307550 A CN 109307550A CN 201811357346 A CN201811357346 A CN 201811357346A CN 109307550 A CN109307550 A CN 109307550A
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Classifications
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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
- G01J1/02—Details
- G01J1/0252—Constructional arrangements for compensating for fluctuations caused by, e.g. temperature, or using cooling or temperature stabilization of parts of the device; Controlling the atmosphere inside a photometer; Purge systems, cleaning devices
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a kind of temperature-compensation methods for improving light power meter stability, and in particular to light power meter technique for temperature compensation field.Which solve the not temperature compensated devices of existing light power meter, when light power meter is tested for a long time, are influenced by circuit fever itself and ambient temperature variation, cause to test the increased deficiency of uncertainty.The temperature-compensation method of the raising light power meter stability, light power meter is placed in high-low temperature chamber, temperature is successively adjusted from -10 DEG C~40 DEG C, CPU module records the zero point value of the different stalls of each temperature spot, current gear null offset caused by the benchmark temperature computation temperature difference；CPU module obtains the optical power value of photodetector detection, current optical power detecting gear is set, and obtain the real time temperature of temperature sensor detection, the calibration factor of null offset is sent to secondary amplifying circuit by temperature-compensation circuit and carries out hardware circuit compensation by the temperature drift that CPU module benchmark temperature is generated in current gear.
Description
Technical field
The present invention relates to light power meter technique for temperature compensation fields, and in particular to a kind of temperature for improving light power meter stability
Spend compensation method.
Background technique
Light power meter is a kind of measuring instrument indispensable in fiber optic communication, optical fiber cable and optical active component research and development,
It is had a wide range of applications in production, test.Traditional light power meter mainly includes that photoelectric detection module, I/V conversion module, data are logical
Believe module, A/D conversion module, CPU processing module, display module etc., in photoelectric detection module the responsiveness of detector itself with
And the test zero point of the dark current of pre-amplification circuit be affected by temperature it is larger, and power meter during the test due to circuit from
Body heat production, and the temperature of test environment change, and the zero point of power meter is caused to generate temperature drift.In general, before testing to light
Power meter carries out zeroing processing, can effectively make up current time null offset as caused by temperature change；But it is needed in long-time
Will to device stability carry out follow-on test, or test variation of ambient temperature it is larger when, zeroing mode can not just avoid completely
Because of the temperature drift that temperature change generates, increase so as to cause the test uncertainty of light power meter, there are larger defects.
In traditional scheme, the not temperature compensated device of light power meter is sent out when light power meter is tested for a long time by circuit itself
Heat and ambient temperature variation influence, and light power meter cabinet inside temperature changes, and test zero point generates temperature drift, cause
Uncertainty is tested to increase.
In existing scheme, disclose " it is a kind of can real-time compensation desk-top laser power meter and its compensation method ", the party
Case includes power module, photodetector, I/V and span-changing device, the first A/D converter, central processing unit, LCD module, temperature
Acquisition module, I/V converter, the second A/D converter are spent, using preset temperature penalty coefficient, by the optical power value of actual test
As initial value, multiplication is done with the penalty coefficient under Current Temperatures and is shown as test optical power.The light that detector is measured
Performance number is as initial value, and multiplied by pre-set compensation factor, the optical power value as output is shown.In such scheme, at certain
A temperature spot, for all gear values multiplied by identical compensation factor, error is larger.It and is really that different gears is to temperature
Susceptibility it is different, the temperature sensitive degree of high tap position is low, is influenced by temperature change small；The temperature sensitive degree of low-grade location is high, by temperature
Degree influences big；Different test gear i.e. under same temperature, and compensation factor difference (such as: at 30 DEG C, test-respectively
The optical power of 10dBm and -80dBm, gear is different at this time, and compensation factor also answers difference).The optical power value that detector is measured is made
For initial value, directly it is modified using software multiplied by coefficient.In such scheme, when temperature change is larger, detector is minimum
The pre-amplification circuit output of shelves is possible to be saturated, directly larger using software correcting errors.
Summary of the invention
The purpose of the present invention is in view of the above deficiencies, proposing a kind of temperature-compensation method of high light power meter stability,
The calibration factor of null offset is directly transmitted by temperature-compensation circuit and carries out hardware circuit compensation, is realized to different temperature points
Differentiation is carried out according to different stalls accurately to compensate.
The present invention specifically adopts the following technical scheme that
A kind of temperature-compensation method improving light power meter stability, the temperature compensation means of use includes sequentially connected
Photodetector, pre-amplification circuit, secondary amplifying circuit, A/D converter and CPU module, CPU module according to current gear and
Compensation factor is delivered to secondary amplifying circuit by temperature-compensation circuit and D/A converter by fiducial temperature, which is characterized in that tool
Body includes:
Light power meter is placed in high-low temperature chamber, temperature is successively adjusted from -10 DEG C~40 DEG C, CPU module record is each
The zero point value of the different stalls of temperature spot, current gear null offset caused by the benchmark temperature computation temperature difference；CPU module obtains
The optical power value detected to photodetector, is arranged current optical power detecting gear, and obtains the real-time of temperature sensor detection
Temperature, the temperature drift that CPU module benchmark temperature is generated in current gear, by temperature-compensation circuit by null offset
Calibration factor is sent to secondary amplifying circuit and carries out hardware circuit compensation.
Preferably, the temperature sensing module for measuring real time temperature is also connected in the CPU module.
Preferably, range control circuit is also connected in the CPU module, CPU module is realized by range control circuit
Gear switch to pre-amplification circuit.
Preferably, the temperature compensation means further includes the power module powered for whole device and the function for obtaining CPU
The display module that rate value is shown.
Preferably, setting 25 DEG C is benchmark temperature.
The invention has the following beneficial effects:
The temperature-compensation method of the raising light power meter stability provides the difference that different stalls carry out under different temperatures
Change calibration factor compensation, improves light power meter stable testing degree and test accuracy；
By temperature-compensation circuit, the calibration factor of different temperatures different stalls is passed through temperature-compensation circuit by CPU module
Direct compensation carries out hardware compensating to pre-amplification circuit；It effectively prevents causing on some gear because temperature change is excessive
Deep low gear pre-amplification circuit export saturation problem.
Detailed description of the invention
Fig. 1 is temperature compensation means structural block diagram.
Specific embodiment
A specific embodiment of the invention is described further in the following with reference to the drawings and specific embodiments:
As shown in Figure 1, a kind of temperature-compensation method for improving light power meter stability, the temperature compensation means of use include
Sequentially connected photodetector, pre-amplification circuit, secondary amplifying circuit, A/D converter and CPU module, CPU module according to
Compensation factor is delivered to secondary amplifying circuit by temperature-compensation circuit and D/A converter by current gear and fiducial temperature,
It is characterized in that, specifically includes:
Light power meter is placed in high-low temperature chamber, temperature is successively adjusted from -10 DEG C~40 DEG C, CPU module record is each
The zero point value of the different stalls of temperature spot, 25 DEG C of setting are benchmark temperature, current shelves caused by the benchmark temperature computation temperature difference
Position null offset；CPU module obtains the optical power value of photodetector detection, current optical power detecting gear is arranged, and obtain
The real time temperature of temperature sensor detection, the temperature drift that CPU module benchmark temperature is generated in current gear pass through temperature
The calibration factor of null offset is sent to secondary amplifying circuit and carries out hardware circuit compensation by compensation circuit.
Temperature sensing module, the range control circuit for measuring real time temperature, CPU module are also connected in CPU module
By range control circuit, the gear switch to pre-amplification circuit is realized.Temperature compensation means further includes for whole device confession
The power module of electricity and the display module for showing the CPU performance number obtained.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (5)
1. a kind of temperature-compensation method for improving light power meter stability, the temperature compensation means of use includes sequentially connected light
Electric explorer, pre-amplification circuit, secondary amplifying circuit, A/D converter and CPU module, CPU module is according to current gear and base
Compensation factor is delivered to secondary amplifying circuit by temperature-compensation circuit and D/A converter by quasi- temperature, which is characterized in that specific
Include:
Light power meter is placed in high-low temperature chamber, successively adjusts temperature from -10 DEG C~40 DEG C, CPU module records each temperature
The zero point value of the different stalls of point, current gear null offset caused by the benchmark temperature computation temperature difference；CPU module obtains light
The optical power value of electric explorer detection, is arranged current optical power detecting gear, and obtains the real time temperature of temperature sensor detection,
The temperature drift that CPU module benchmark temperature is generated in current gear, by temperature-compensation circuit by the calibration of null offset
The factor is sent to secondary amplifying circuit and carries out hardware circuit compensation.
2. a kind of temperature-compensation method for improving light power meter stability as described in claim 1, which is characterized in that described
The temperature sensing module for measuring real time temperature is also connected in CPU module.
3. a kind of temperature-compensation method for improving light power meter stability as described in claim 1, which is characterized in that described
Range control circuit is also connected in CPU module, CPU module realizes the shelves to pre-amplification circuit by range control circuit
Position switching.
4. a kind of temperature-compensation method for improving light power meter stability as claimed in claim 2 or claim 3, which is characterized in that institute
State the display that temperature compensation means further includes the power module for whole device power supply and shows the CPU performance number obtained
Module.
5. a kind of temperature-compensation method for improving light power meter stability as claimed in claim 2, which is characterized in that setting 25
DEG C be benchmark temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811357346.1A CN109307550A (en) | 2018-11-15 | 2018-11-15 | A kind of temperature-compensation method improving light power meter stability |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811357346.1A CN109307550A (en) | 2018-11-15 | 2018-11-15 | A kind of temperature-compensation method improving light power meter stability |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686434A (en) * | 2021-08-23 | 2021-11-23 | 长飞光纤光缆股份有限公司 | Temperature simulation compensation method and system for photoelectric detection device |
| CN113686433A (en) * | 2021-08-23 | 2021-11-23 | 长飞光纤光缆股份有限公司 | Photoelectric detector and erbium-doped optical fiber amplifier based on dark current compensation |
| CN114526815A (en) * | 2022-02-07 | 2022-05-24 | 中电科思仪科技股份有限公司 | Temperature and humidity compensation method for improving optical power measurement accuracy |
| WO2024013299A1 (en) | 2022-07-14 | 2024-01-18 | Trinamix Gmbh | Background-based correction of photodetector drift |
| WO2024013310A1 (en) | 2022-07-14 | 2024-01-18 | Trinamix Gmbh | Temperature drift compensation of photoresistors |
| WO2024013293A1 (en) | 2022-07-14 | 2024-01-18 | Trinamix Gmbh | Detector with temperature drift compensation |
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| CN101196558A (en) * | 2006-12-05 | 2008-06-11 | 孙劲楼 | Pen type magnetic induction meter |
| JP2012193978A (en) * | 2011-03-15 | 2012-10-11 | Central Research Institute Of Electric Power Industry | Temperature distribution measuring method, measuring device and measuring program |
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2018
- 2018-11-15 CN CN201811357346.1A patent/CN109307550A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101196558A (en) * | 2006-12-05 | 2008-06-11 | 孙劲楼 | Pen type magnetic induction meter |
| JP2012193978A (en) * | 2011-03-15 | 2012-10-11 | Central Research Institute Of Electric Power Industry | Temperature distribution measuring method, measuring device and measuring program |
Non-Patent Citations (1)
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| 孙超等: ""一种高灵敏度近红外光纤光功率计的设计"", 《红外》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686434A (en) * | 2021-08-23 | 2021-11-23 | 长飞光纤光缆股份有限公司 | Temperature simulation compensation method and system for photoelectric detection device |
| CN113686433A (en) * | 2021-08-23 | 2021-11-23 | 长飞光纤光缆股份有限公司 | Photoelectric detector and erbium-doped optical fiber amplifier based on dark current compensation |
| CN114526815A (en) * | 2022-02-07 | 2022-05-24 | 中电科思仪科技股份有限公司 | Temperature and humidity compensation method for improving optical power measurement accuracy |
| CN114526815B (en) * | 2022-02-07 | 2023-09-01 | 中电科思仪科技股份有限公司 | Temperature and humidity compensation method for improving optical power measurement accuracy |
| WO2024013299A1 (en) | 2022-07-14 | 2024-01-18 | Trinamix Gmbh | Background-based correction of photodetector drift |
| WO2024013310A1 (en) | 2022-07-14 | 2024-01-18 | Trinamix Gmbh | Temperature drift compensation of photoresistors |
| WO2024013293A1 (en) | 2022-07-14 | 2024-01-18 | Trinamix Gmbh | Detector with temperature drift compensation |
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