Single-chip microprocessor based automatic temperature control drive circuit
A technology of driving circuits and single-chip microcomputers, which is applied in computer control, non-electric variable control, temperature control using digital devices, etc., can solve the problems of affecting the service life of the laser, instability of the laser wavelength, or even too high or too low. Reliable performance, stable temperature control and fast temperature
Pending Publication Date: 2018-03-27
WUXI LUMISOURCE TECH
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Problems solved by technology
[0002] Semiconductor lasers generate a lot of heat and are very sensitive to temperature. They need to work at a constant temperature. In some extreme weather applications, the temperature may even be too high or too low, which may lead to instability of the laser wavelength, thereby affecting the use of the laser. Therefore, we have considered designing a laser system product that can freely set the temperature and control the constant temperature. The laser drive circuit that uses a single-chip microcomputer to control the temperature is the core content of this design, and the drive circuit must also meet the high-power, high-power requirements of the laser. Features of Stability
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[0018] Such as figure 1 The circuit shown is a temperature regulation module, to be precise, it is an H-bridge circuit that uses the Peltier effect to heat up or cool down. The H-bridge circuit includes: a semiconductor cooler (TEC), two N-channel field effect transistors Q3, Q4, two PMOS transistors Q1, Q2, among them, Q1 and Q3 constitute the left arm of the H bridge, Q2, Q4 constitute the right arm of the H bridge, the D pole of Q1 and the D pole of Q2 are connected to the voltage V1, and the S pole of Q3 and The S pole of Q4 is grounded, the S pole of Q1 and the D pole of Q3 are connected to the N-type element of TEC, the D pole of Q4 and the S pole of Q2 are connected to the P-type element of TEC, when the current passes through Q1, TEC, and Q4, the TEC's The current flows from N to P to form a cold end; when the current flows through Q2, TEC, and Q3, the TEC current flows from P to N to form a hot end, and the H bridge is used to control the direction of the TEC current ...
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The invention discloses a single-chip microprocessor based automatic temperature control drive circuit. A power module is connected with a single-chip microprocessor, an A / D collection module and a temperature control A / D collection module and a temperature regulation module and is used for supplying working current for the above parts. The single-chip microprocessor is connected with the A / D collection module and is used for receiving collected temperature information. The single-chip microprocessor is connected with the temperature control module and the temperature regulation module and outputs commands for controlling operation of the temperature regulation module. Automatic selection of temperature collection, temperature adjustment and gear adjustment is realized. A TEC is adopted for temperature adjustment, so that the speed is high, the temperature control is stable, the performance is stable, temperature stability can be realized quickly and adaptability to extreme weather isachieved. Thus, a laser device can work in a constant temperature environment. A laser system is integrated, so that more requirements of clients can be met. At the same time, normal working of the laser device can be realized, interference due to external temperature is avoided and influence on light wavelength is prevented. Therefore, stability and anti-interference capability are improved.
Description
technical field [0001] The invention relates to an automatic temperature control drive circuit, in particular to an automatic temperature control laser drive circuit based on a single chip microcomputer. Background technique [0002] Semiconductor lasers generate a lot of heat and are very sensitive to temperature. They need to work at a constant temperature. In some extreme weather applications, the temperature may even be too high or too low, which may lead to instability of the laser wavelength, thereby affecting the use of the laser. Therefore, we have considered designing a laser system product that can freely set the temperature and control the constant temperature. The laser drive circuit that uses a single-chip microcomputer to control the temperature is the core content of this design, and the drive circuit must also meet the requirements of high power, high characteristics of stability. Contents of the invention [0003] The present invention provides an automat...
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IPC IPC(8): G05D23/19G05D23/24G05B19/042
CPCG05B19/042G05B19/0423G05D23/1917G05D23/24G05B2219/21137G05B2219/2614
Inventor 张涛韦春雷
Owner WUXI LUMISOURCE TECH