CN205159790U - Colliery is semiconductor laser's temperature control system in optic fibre temperature measurement in pit - Google Patents

Colliery is semiconductor laser's temperature control system in optic fibre temperature measurement in pit Download PDF

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Publication number
CN205159790U
CN205159790U CN201520869701.9U CN201520869701U CN205159790U CN 205159790 U CN205159790 U CN 205159790U CN 201520869701 U CN201520869701 U CN 201520869701U CN 205159790 U CN205159790 U CN 205159790U
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China
Prior art keywords
temperature
control
measurement
semiconductor laser
module
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Expired - Fee Related
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CN201520869701.9U
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Chinese (zh)
Inventor
黄友锐
凌六一
韩涛
徐善永
宋得名
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Anhui University of Science and Technology
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Anhui University of Science and Technology
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Abstract

The utility model provides a colliery is laser instrument temperature control system in the optic fibre temperature measurement in the pit, divide into the sampling, relatively controls, adjusts three module. Temperature and keyboard to set the temperature through gathering pt100 temperature sensor carry out relatively obtaining the difference in temperature and slewing rate, amplify after converting it into the signal of telecommunication, processing such as filtering, and convert data signal into through high -speed AD, C8051F040 reads data signal and sends into LCD and show and calculate corresponding parameter according to the PID algorithm and adjust PWM controller output, the switching on and end of input signal control MOSFETH bridge, through the inside TEC module of driving laser ware, realize laser instrument high accuracy temperature control. Revise in the temperature rethread platinum resistance pt100 measurement of while laser instrument and the system of feeding back, form a closed loop control system, make the laser instrument temperature reach the settlement temperature value at last.

Description

The temperature control system of semiconductor laser in a kind of underground coal mine optical fiber temperature-measurement
Technical field
The utility model relates to the temperature control field of semiconductor laser, is specially semiconductor laser temperature control system in a kind of underground coal mine optical fiber temperature-measurement.
Background technology
Semiconductor laser (LD) has that monochromaticjty is good, volume is little, quality is light, price is low, power consumption is little, be easy to the advantages such as modulation, is widely used in Fibre Optical Sensor and communication.The instability of semiconductor laser power output is mainly because the change of ambient temperature makes the output voltage of semiconductor laser drive power unstable, and the change of working temperature is drifted about directly causing the output center wavelength of light of semiconductor laser, its characteristic is drifted about to long wavelength direction with the rising of temperature, the variations in temperature of usual LD should control within 0-0.5 DEG C, guarantee is when applied current modulation LD, and the impact of temperature can not cause serious consequence.In addition, the power output of semiconductor laser is also quite serious by the impact of temperature, therefore, carries out strict control, have very important meaning to the working temperature of LD.
According to the difference of control object, required precision, there is various temperature-adjusting circuit.Wherein traditional scheme has the attemperating unit adopting feedback analog circuit, and this kind of device has fixed temperature working point, and circuit is once complete, and its institute can stable working temperature just be fixed up, and is difficult to the modulation of realization to working temperature.For this problem, system adopts Pt100 temperature sensor to convert sample temperature to the signal of telecommunication, reaches C8051F040 through signal conditioning circuit, simultaneously compared with design temperature, is showing that corresponding controlled quentity controlled variable exports with pwm signal form through pid algorithm.Output signal and drive TEC to freeze to laser by the conducting of MOSFETH bridge and cut-off and heat.Form the control system of a closed loop, finally make laser temperature reach set temperature value.In sum, semiconductor laser temperature control system in a kind of underground coal mine optical fiber temperature-measurement, not only structure is simple, stability strong, and temperature governing speed is fast, temperature-controlled precision is high.
Utility model content
The purpose of this utility model is to provide semiconductor laser temperature control system in a kind of underground coal mine optical fiber temperature-measurement, and the closed loop feedback adopting temperature sensors of high precision and semiconductor cooler TEC to realize temperature regulates, and realizes the high accuracy temperature control of laser.
In order to achieve the above object, the technical scheme that the utility model adopts is: semiconductor laser temperature control system in a kind of underground coal mine optical fiber temperature-measurement, by control of sampling, compare, regulate three modules to form, it is characterized in that sampling module comprises temperature sensor, signal conditioning circuit; Relatively control module comprises core controller, digital-to-analogue converter, liquid crystal display and keyboard; Adjustment module enclosed mass PWM controller, mosfet driver, MOSFETH bridge and TEC module.
Semiconductor laser temperature control system in described a kind of underground coal mine optical fiber temperature-measurement, is characterized in that: described sampling module comprises temperature sensor Pt100 and buzzer TMB12D05.
Semiconductor laser temperature control system in described a kind of underground coal mine optical fiber temperature-measurement, is characterized in that: the described control module that compares comprises A/D converter ICL7109, LCD12864, keyboard, core controller C8051F040 and PWM controller UC3842.
Semiconductor laser temperature control system in described a kind of underground coal mine optical fiber temperature-measurement, is characterized in that: described adjustment module comprises DRV592MOSFETH bridge and TES1-4903P type TEC.
Compared with the prior art, the utility model beneficial effect is embodied in:
The utility model adopts the conducting of PWM control MOSFETH bridge and cut-off to carry out the inner TEC module of drive laser, and realize the high-precision temperature of laser and control, reliability is high, and structure is simple.With C8051F040 single-chip microcomputer for data acquisition and control process core, export according to pid algorithm adjustment PWM, fast operation, digital signal processing capability is strong.
Accompanying drawing explanation
Fig. 1 is the utility model system construction drawing
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
As indicated with 1, in a kind of underground coal mine optical fiber temperature-measurement, semiconductor laser temperature control system can be divided into sampling, compares control, regulate three parts the present embodiment overall system architecture figure.The platinum resistance Pt100 that systematic sampling part employing measuring range is large, good stability, indicating value reproducibility are high is as temperature sensor, the variations in temperature of laser external cavity converts the signal of telecommunication to through Pt100, through signal conditioning circuits such as amplification, filtering, isolation, send in single-chip microcomputer.Native system has operational failure alarm indication function, and when the temperature value that platinum resistance thermometer sensor, Pt100 collects exceedes design temperature scope, C8051F040 single-chip microcomputer can export a signal, amplifies rear drive buzzer send alarm signal by triode.
Systematic comparison control section is made up of core controller C8051F040 and PWM controller UC3842, A/D converter, LCD12864 and keyboard.High accuracy, low noise, cheap 12 double integration A/D converter ICL7109 that system adopts American I ntersil company to produce, sampled signal is sent in core controller through A/D converter, the display of translation data adopts LCD12864, and hardware circuit is simple.System adopts current type PWM control chip UC3842, and Single-end output can Direct driver metal-oxide-semiconductor, has the advantages such as pin is few, peripheral circuit is simple.Under C8051F040 controls, sample temperature is compared with design temperature, and its difference calculates the output of corresponding controlled quentity controlled variable adjustment PWM controller according to Digital PID Algorithm.
System fading margin part is made up of MOSFETH bridge and TEC module.A kind of high efficiency, high-power H bridge power drives integration module DRV592 that system adopts TI company to produce, tool 4 high-power MOSFETs and overload protecting circuit, its output voltage range is 2.8 ~ 5.5V, and maximum output current is 3A.Adopt the TES1-4903P type TEC module that the Arctic Ocean, Hainan electronic cooling technology company produces, TEC is a kind of gas heat pump according to paltie effect work, there is the advantages such as volume is little, noiselessness, quality are light, it allows the maximum current passed through to be 3A, peak power output 25 DEG C time is 9.5W, the maximum voltage at two ends is 5.6V, and the highest control temperature reaches 67 DEG C.Pwm signal input DRV592 carries out power amplification, exports DC driven TEC through LC filtering.When the MOSFET pipe conducting of Q3 and Q1, the MOSFET pipe of Q2 and Q4 is closed, and namely electric current flows to TEC-from TEC+; Otherwise control Q2 and Q4 conducting, Q1 and Q3 closes, and electric current flows to TEC+ from TEC-, so just can realize the refrigeration of TEC and heat.The temperature of laser is measured by platinum resistance thermometer sensor, Pt100 and is fed back in system again and revises simultaneously, forms a closed-loop control system, finally makes laser temperature reach set temperature value.

Claims (4)

1. a semiconductor laser temperature control system in underground coal mine optical fiber temperature-measurement, is divided into sampling, compares control, regulates three modules, it is characterized in that: sampling module comprises temperature sensor, signal conditioning circuit; Relatively control module comprises core controller, digital-to-analogue converter, liquid crystal display and keyboard; Adjustment module enclosed mass PWM controller, mosfet driver, MOSFETH bridge and TEC module.
2. semiconductor laser temperature control system in a kind of underground coal mine optical fiber temperature-measurement according to claim 1, is characterized in that: described sampling module comprises temperature sensor Pt100 and buzzer TMB12D05.
3. semiconductor laser temperature control system in a kind of underground coal mine optical fiber temperature-measurement according to claim 1, is characterized in that: the described control module that compares comprises A/D converter ICL7109, LCD12864, keyboard, core controller C8051F040 and PWM controller UC3842.
4. semiconductor laser temperature control system in a kind of underground coal mine optical fiber temperature-measurement according to claim 1, is characterized in that: described adjustment module comprises DRV592MOSFETH bridge and TES1-4903P type TEC.
CN201520869701.9U 2015-11-02 2015-11-02 Colliery is semiconductor laser's temperature control system in optic fibre temperature measurement in pit Expired - Fee Related CN205159790U (en)

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CN201520869701.9U CN205159790U (en) 2015-11-02 2015-11-02 Colliery is semiconductor laser's temperature control system in optic fibre temperature measurement in pit

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Application Number Priority Date Filing Date Title
CN201520869701.9U CN205159790U (en) 2015-11-02 2015-11-02 Colliery is semiconductor laser's temperature control system in optic fibre temperature measurement in pit

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106895923A (en) * 2017-04-27 2017-06-27 北京环境特性研究所 A kind of temperature stabilization device of non-refrigerated infrared detector
WO2018121061A1 (en) * 2016-12-30 2018-07-05 深圳市光峰光电技术有限公司 Method and device for controlling phase-change refrigeration system with solid-state light-emitting light source, and projection device
CN108708713A (en) * 2018-05-28 2018-10-26 成都威尔普斯石油工程技术服务有限公司 The measurement technique of well logging is cutd open in a kind of producing well production

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018121061A1 (en) * 2016-12-30 2018-07-05 深圳市光峰光电技术有限公司 Method and device for controlling phase-change refrigeration system with solid-state light-emitting light source, and projection device
CN106895923A (en) * 2017-04-27 2017-06-27 北京环境特性研究所 A kind of temperature stabilization device of non-refrigerated infrared detector
CN106895923B (en) * 2017-04-27 2019-01-25 北京环境特性研究所 A kind of temperature stabilising arrangement of non-refrigerated infrared detector
CN108708713A (en) * 2018-05-28 2018-10-26 成都威尔普斯石油工程技术服务有限公司 The measurement technique of well logging is cutd open in a kind of producing well production

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160413

Termination date: 20161102

CF01 Termination of patent right due to non-payment of annual fee