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Precision thermostatic control laboratory box

A technology of constant temperature control and constant temperature controller, which is applied in the direction of using electric means for temperature control, electric controller, controller with specific characteristics, etc., can solve the problems of publicity and no specific structure, and reduce breakdown damage. , Good thermal insulation effect, stable performance

Inactive Publication Date: 2010-01-20
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] But above-mentioned product also only has the introduction of product performance, and has not seen the disclosure of concrete structure

Method used

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  • Precision thermostatic control laboratory box
  • Precision thermostatic control laboratory box
  • Precision thermostatic control laboratory box

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1 The general structure of the present invention is described with reference to the accompanying drawings

[0058] The precise constant temperature control box of the present invention can be divided into two parts: a constant temperature box and a constant temperature controller.

[0059] The incubator includes a heat preservation part member and a heat transfer part member.

[0060] The function of the insulation part is to make the heat transferred by the heat transfer part return to the external environment as little as possible. like figure 2 As shown, the components of the thermal insulation part of the incubator are as follows: the outer shell (11) of the box is designed with stainless steel, which ensures the strength of the entire box. In order to keep the air temperature in the box as consistent as possible, aluminum with better thermal conductivity is used as the material of the inner tank (12). The thermal insulation layer (13) is made of poly...

Embodiment 2

[0065] Embodiment 2 The circuit structure of the thermostatic controller is described with reference to the accompanying drawings

[0066] like image 3 As shown, the temperature setting circuit (1) of the thermostatic controller includes: an external DC power supply (Vcc) is connected to a 9.1k resistor and then a precision voltage reference module (LM336) is grounded; LM336 is connected to a 10k potentiometer in parallel, and its tap It is connected to the non-inverting input terminal of the operational amplifier U7B; the inverting input terminal of the operational amplifier U7B is connected to a 10k resistor to ground, and then a 22k resistor is connected to the U7B output. In addition, in order to improve the driving ability, a voltage follower composed of U2B is added to the output end of U7B. The non-inverting input end of U2B is connected to the output end of U7B, and the inverting input end of U2B is connected to its output end.

[0067] like Figure 4 As shown, the ...

Embodiment 3

[0073] Embodiment 3 Design of PID control system of the present invention

[0074] The constant temperature controller part of the constant temperature control experiment box is obtained by changing the PID control parameters. The method for determining this parameter is as follows:

[0075] Because the whole system involves many links, it is inconvenient to directly analyze it in the time domain, so it is necessary to establish the model of the system in the S domain. The open-loop transfer function of the system consists of two parts: the PID control system transfer function and the controlled system transfer function, namely G(s)=G 1 (s) · G 2 (s), and because C(s)=G(s)·[R(s)-C(s)], the system closed-loop transfer function is:

[0076] C ( s ) R ( s ) = ...

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Abstract

The invention provides a sophisticated and constant temperature control experiment box and belongs to the technological field of electronic equipment. The invention consists of an incubator (10) and a constant temperature controller. The incubator (10) comprises an insulation component and a thermal transfer component; the constant temperature controller consists of a temperature setting circuit (1), a temperature measurement circuit (2), a subtraction circuit (3), a PI control circuit (4), a limiting protection circuit (5), a TEC drives circuit (VCCS) (6) and a display circuit (7). The invention has the stable performance and the reliable work; the temperature control accuracy is 0.1 DEG C; the short-term stability is plus or minus 2.6*10<-3> DEG C; the long-term stability is plus or minus 0.024 DEG C; the temperature range at the normal temperature is 10 DEG C to 40 DEG C. The invention can not only be used for providing a constant-temperature environment for active lock-mold fiber laser experiment, but also can be used for measurement and testing on small occasions and for detection of gradually changed weak signals.

Description

technical field [0001] The invention belongs to the technical field of electronic equipment, and particularly relates to a constant temperature control box used in a small-scale high-stable constant temperature environment. Background technique [0002] With the continuous increase of people's demand for information, the transmission capacity of the communication system also needs to be improved accordingly. Optical soliton communication can provide a very high transmission rate. It has the characteristics of conformal transmission and can transmit extremely long distances without deformation. Its transmission capacity is 1 to 2 orders of magnitude higher than that of today's best communication systems. The distance can reach hundreds of kilometers, so optical soliton communication has quickly become a research hotspot. Ultra-high-speed active mode-locked fiber lasers are considered to be ideal light sources for future long-distance relayless fiber-optic communication syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/19G05B11/42
Inventor 单江东田小建汝玉星吴戈
Owner JILIN UNIV
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