CN203561901U - PWM temperature controller for electrical detection system - Google Patents
PWM temperature controller for electrical detection system Download PDFInfo
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- CN203561901U CN203561901U CN201320749114.7U CN201320749114U CN203561901U CN 203561901 U CN203561901 U CN 203561901U CN 201320749114 U CN201320749114 U CN 201320749114U CN 203561901 U CN203561901 U CN 203561901U
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Abstract
A PWM temperature controller for an electrical detection system relates to the field of temperature control. The problem that an existing temperature control element adopting a thermocouple sensor is low in structure precision, high in noise and not suitable for precision measurement under low-noise requirement of a high-frequency circuit is solved. The PWM temperature controller comprises a sealing cover, a detector of which the upper end is fixedly sealed in the sealing cover, an aluminum block of which the upper end face is fixedly attached to the lower end face of the detector, a thermal resistor fixedly installed on the aluminum block, a Peltier fixedly attached to the lower end face of the aluminum block, and a control circuit respectively and electrically connected with the thermal resistor and the Peltier, wherein the aluminum block synchronizes the temperature of the detector onto the thermal resistor, current changing with the thermal resistor acts on the Peltier, the thermal resistor transfers sensed temperature to the control circuit, and the control circuit controls the temperature change of the Peltier by comparing the voltage value of a target object with a set voltage value and according to a comparison result. The PWM temperature controller controls the temperature within the range from minus 20 DEG C to 60 DEG C, and the stability is up to +/-0.01.
Description
Technical field
The utility model relates to temperature control technology field, is specifically related to a kind of PWM formula temperature controller for electrical detection system.
Background technology
For the accurate electrical detection system of high frequency, thermal stability is very big for the impact of system accuracy, especially near infrared spectroscopy instrument, the weak signal of measuring is very easy to be subject to the interference of thermonoise and gets muddled, cause testing result to have error, what keep so the measurement mechanism temperature such as detector stable has very important significance for realizing the accurate measurement of electrical detection system.
Existing temperature control parts generally adopt thermocouple sensor, as shown in Figure 1, a thermopair is formed by connecting by two kinds of different metal end, the wherein one end being connected is called as hot junction, the other end is called as cold junction, they are connected to temperature test circuit jointly, and the difference due to temperature between hot junction and cold junction can produce electromotive force, and this electromotive force can measure by metering circuit.The virtual voltage that thermocouple sensor produces depends on the difference of relative temperature and is used to form the different metal types of thermocouple sensor, the sensitivity of thermopair and temperature measurement range are same has much relations with two kinds of metals that use, but adopt the temperature control modular construction precision of thermocouple sensor lower, noise is larger, is not suitable for the precision measurement under the requirement of high-frequency circuit low noise.
Utility model content
In order to solve, the temperature control modular construction precision of existing employing thermocouple sensor is low, noise large, be not suitable for the problem of the precision measurement of high-frequency circuit low noise under requiring, and the utility model provides a kind of PWM formula temperature controller for electrical detection system.
The utility model for the technical scheme that technical solution problem adopts as follows:
For the PWM formula temperature controller of electrical detection system, comprising:
Seal closure;
The detector of upper end fixing seal in seal closure;
The aluminium block that upper surface and detector lower surface fixedly fit together;
Be fixedly mounted on the thermistor on aluminium block, described aluminium block is synchronized with the temperature of detector on thermistor;
The Po Er fixedly fitting together with aluminium block lower surface pastes, and the function of current changing with thermistor is sticked in Po Er;
Paste with thermistor and Po Er the control circuit being electrically connected respectively, described thermistor passes to control circuit by the temperature of perception, the temperature variation that control circuit pastes by comparison object thing magnitude of voltage and setting voltage value and according to comparative result control Po Er.
Also comprise with described Po Er and paste and be electrically connected for promoting the temperature heating radiator of conduction in real time.
Described control circuit comprises the temperature voltage metering circuit being electrically connected with described thermistor, described thermistor passes to the temperature of perception temperature voltage metering circuit and this temperature conversion is become to corresponding actual voltage value, and object set point temperatures is converted into corresponding setting voltage value;
With the differential amplifier that temperature voltage metering circuit is electrically connected, described differential amplifier carries out amplification ratio by the actual voltage value of object and setting voltage value;
The PID corrective network being electrically connected with differential amplifier, described PID corrective network receives the comparative result from differential amplifier, and PID corrective network regulates measuring and calculating temperature stability and Time Created according to comparative result;
With PID corrective network and the H bridge circuit that is electrically connected, described H bridge circuit pastes and is electrically connected with Po Er, the temperature variation that described PID corrective network is pasted by H bridge circuit control Po Er: when object temperature is during higher than set point temperatures, H bridge circuit pastes refrigeration direction output current to Po Er, and reduces temperature; When the temperature of object reduces, H bridge circuit will reduce output current or reversion output current direction is pasted heating to Po Er, makes object temperature reach set point temperatures.
Described detector adopts G9203-256S model.
Described thermistor adopts MF52 3950 models.
In described seal closure, be full of inert gas or vacuumize.
Described seal closure adopts glass material to make.
The invention has the beneficial effects as follows: the PWM formula temperature controller for electrical detection system of the present invention, can control temperature stabilization at-20～+ 60 degree, stability can reach ± and 0.01, there is the advantage of miniaturization, economization, and refrigeration precision can reach the requirement that noise reduction is measured completely.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the thermocouple sensor in existing temperature control parts;
Fig. 2 is the structural representation of the PWM formula temperature controller for electrical detection system of the present utility model;
Fig. 3 is the principle of work schematic diagram of the control circuit of the PWM formula temperature controller for electrical detection system of the present utility model.
In figure: 1, detector, 2, aluminium block, 3, thermistor, 4, Po Er pastes, 5, seal closure, 6, heating radiator, 7, control circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 2, PWM formula temperature controller for electrical detection system of the present utility model, mainly by detector 1, aluminium block 2, thermistor 3, Po Er pastes 4, seal closure 5, heating radiator 6 and control circuit 7 form, the upper end fixing seal of detector 1 is in seal closure 5, the upper surface of the lower surface of detector 1 and aluminium block 2 fixedly fits together, thermistor 3 is fixedly mounted on aluminium block 2, the lower surface of aluminium block 2 and Po Er paste 4 and fixedly fit together, Po Er pastes 4 and is electrically connected with heating radiator 6, control circuit 7 pastes 4 with thermistor 3 and Po Er respectively and is electrically connected, control circuit 7 is for receiving the temperature of thermistor 3 perception, control circuit 7 is by comparison object thing magnitude of voltage and setting voltage value and according to comparative result control Po Er, paste 4 temperature variation.
As shown in Figure 3, control circuit 7 is mainly comprised of temperature voltage metering circuit, differential amplifier, PID corrective network and H bridge circuit, wherein, temperature voltage metering circuit is electrically connected with thermistor 3, temperature voltage metering circuit is electrically connected with differential amplifier, differential amplifier is electrically connected with PID corrective network, and PID corrective network is electrically connected with H bridge circuit, and H bridge circuit pastes 4 with Po Er and is electrically connected.
In present embodiment, the concrete G9203-256S model that adopts of detector 1.
In present embodiment, concrete MF52 3950 models that adopt of thermistor 3.
In present embodiment, be full of inert gas or vacuumize in seal closure 5, seal closure 5 adopts glass material to make, and prevents dust and frosting, extends the serviceable life of whole temperature controller.
In present embodiment, the effect of heating radiator 6 is the real-time conduction that promote temperature.
In present embodiment, the concrete PID corrective network principle that adopts of control circuit 7, utilizes H bridge circuit structure to control.
The course of work of PWM formula temperature controller of the present utility model is as follows:
As shown in Figures 2 and 3, the real time temperature of detector 1 is synchronized with on thermistor 3 by aluminium block 2, the function of current changing with thermistor 3 is pasted on 4 in Po Er, while thermistor 3 passes to the temperature voltage metering circuit in control circuit 7 by the temperature of perception and this temperature conversion is become to the actual voltage value of corresponding object, object set point temperatures is converted into the setting voltage value of corresponding object, the setting voltage value of the actual voltage value of object and object is carried out to amplification ratio by differential amplifier, and comparative result is passed to PID corrective network, PID corrective network regulates measuring and calculating temperature stability and Time Created according to comparative result, through H bridge circuit control Po Er, paste 4 temperature variation: when object temperature is during higher than set point temperatures, H bridge circuit pastes 4 refrigeration direction output currents to Po Er, and reduce temperature, when the temperature of object reduces, H bridge circuit will reduce output current or reversion output current direction is pasted 4 heating to Po Er, make object temperature reach set point temperatures, by PWM formula temperature controller of the present utility model, can maintain the temperature real-time stabilization of detector 1.
Claims (7)
1. for the PWM formula temperature controller of electrical detection system, it is characterized in that, comprising:
Seal closure (5);
The detector (1) of upper end fixing seal in seal closure (5);
The aluminium block (2) that upper surface and detector (1) lower surface fixedly fits together;
Be fixedly mounted on the thermistor (3) on aluminium block (2), described aluminium block (2) is synchronized with the temperature of detector (1) on thermistor (3);
The Po Er fixedly fitting together with aluminium block (2) lower surface pastes (4), and the function of current changing with thermistor (3) is pasted on (4) in Po Er;
Paste with thermistor (3) and Po Er the control circuit (7) that (4) are electrically connected respectively, described thermistor (3) passes to control circuit (7) by the temperature of perception, and control circuit (7) passes through comparison object thing magnitude of voltage and setting voltage value and according to comparative result control Po Er, pastes the temperature variation of (4).
2. the PWM formula temperature controller for electrical detection system according to claim 1, is characterized in that, also comprises that pasting (4) with described Po Er is electrically connected for promoting the temperature heating radiator (6) of conduction in real time.
3. the PWM formula temperature controller for electrical detection system according to claim 1, it is characterized in that, described control circuit (7) comprises the temperature voltage metering circuit being electrically connected with described thermistor (3), described thermistor (3) passes to the temperature of perception temperature voltage metering circuit and this temperature conversion is become to corresponding actual voltage value, and object set point temperatures is converted into corresponding setting voltage value;
With the differential amplifier that temperature voltage metering circuit is electrically connected, described differential amplifier carries out amplification ratio by the actual voltage value of object and setting voltage value;
The PID corrective network being electrically connected with differential amplifier, described PID corrective network receives the comparative result from differential amplifier, and PID corrective network regulates measuring and calculating temperature stability and Time Created according to comparative result;
With PID corrective network and the H bridge circuit that is electrically connected, described H bridge circuit pastes (4) with Po Er and is electrically connected, described PID corrective network is pasted the temperature variation of (4) by H bridge circuit control Po Er: when object temperature is during higher than set point temperatures, H bridge circuit pastes (4) refrigeration direction output current to Po Er, and reduces temperature; When the temperature of object reduces, H bridge circuit will reduce output current or reversion output current direction is pasted (4) heating to Po Er, makes object temperature reach set point temperatures.
4. the PWM formula temperature controller for electrical detection system according to claim 1, is characterized in that, described detector (1) adopts G9203-256S model.
5. the PWM formula temperature controller for electrical detection system according to claim 1, is characterized in that, described thermistor (3) adopts MF523950 model.
6. the PWM formula temperature controller for electrical detection system according to claim 1, is characterized in that, described seal closure is full of inert gas or vacuumizes in (5).
7. the PWM formula temperature controller for electrical detection system according to claim 1, is characterized in that, described seal closure (5) adopts glass material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320749114.7U CN203561901U (en) | 2013-11-22 | 2013-11-22 | PWM temperature controller for electrical detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320749114.7U CN203561901U (en) | 2013-11-22 | 2013-11-22 | PWM temperature controller for electrical detection system |
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|---|---|
| CN203561901U true CN203561901U (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320749114.7U Expired - Fee Related CN203561901U (en) | 2013-11-22 | 2013-11-22 | PWM temperature controller for electrical detection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592977A (en) * | 2013-11-22 | 2014-02-19 | 长春长光思博光谱技术有限公司 | PWM temperature controller for electrical detection system |
| CN106532835A (en) * | 2016-12-06 | 2017-03-22 | 湖北大学 | Charging device and charger |
| CN114370991A (en) * | 2021-12-10 | 2022-04-19 | 中国科学院合肥物质科学研究院 | Refrigerating device and method for testing photoelectric performance of scientific-grade CCD detector |
-
2013
- 2013-11-22 CN CN201320749114.7U patent/CN203561901U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592977A (en) * | 2013-11-22 | 2014-02-19 | 长春长光思博光谱技术有限公司 | PWM temperature controller for electrical detection system |
| CN106532835A (en) * | 2016-12-06 | 2017-03-22 | 湖北大学 | Charging device and charger |
| CN106532835B (en) * | 2016-12-06 | 2019-04-09 | 湖北大学 | Charging unit and charger |
| CN114370991A (en) * | 2021-12-10 | 2022-04-19 | 中国科学院合肥物质科学研究院 | Refrigerating device and method for testing photoelectric performance of scientific-grade CCD detector |
| CN114370991B (en) * | 2021-12-10 | 2023-05-02 | 中国科学院合肥物质科学研究院 | Refrigerating method for testing photoelectric performance of scientific CCD detector |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20161122 |