CN207337241U - A kind of SCM Based Temperature-controlled appliance - Google Patents

Abstract

It the utility model is related to a kind of SCM Based Temperature-controlled appliance, including microcontroller main control module, the A/D converter being electrically connected with silicon-controlled and the silicon-controlled electric connection the heating element of microcontroller main control module electric connection and the microcontroller main control module, the temperature sensor with A/D converter electric connection；The temperature sensor and the heating element are arranged in temperature control box.The stepless control of heating unit power can be realized and quantitative adjusting is carried out to heating power；Realize and Temperature-controlled appliance run time is automatically controlled; control method is simple, safety; the utility model is automatically controlled using microcontroller; control accuracy is higher; it is not in harmonic pollution; avoid the malfunction for occurring causing and electric appliance being protected in same power grid, with serious pollution the problem of damaging other electric appliances in power grid.

Description

A kind of SCM Based Temperature-controlled appliance

Technical field

This application involves control device technical field, and in particular to a kind of SCM Based Temperature-controlled appliance.

Background technology

With the progress of society, human demand constantly increases, and temperature extensively should as a common control system For in daily life, industrial production and scientific experiment, while people are to the control accuracy of incubator and the demand of dynamic property It is higher and higher.But since Temperature of Warm Case control system is influenced by heating equipment and ambient temperature, generally existing control accuracy Not high or control process the problem of excessively complexity causes equipment manufacturing cost expensive.

Utility model content

For the above situation, to solve the defect of the prior art, the purpose of the utility model is just to provide one kind based on single The Temperature-controlled appliance of piece machine, realizes the quantitative adjusting to heating power, there is provided a kind of SCM Based temperature control is set It is standby, including microcontroller main control module, with the microcontroller main control module be electrically connected it is silicon-controlled, silicon-controlled electrically connect with described The A/D converter and the A/D converter that the heating element connect and the microcontroller main control module are electrically connected are electrically connected Temperature sensor；The temperature sensor and the heating element are arranged in temperature control box.

Further, further include protection circuit, the protection circuit includes comparator and relay, the relay it is defeated Enter end and the silicon-controlled connection, the output terminal of the relay is connected with the heating element, the output terminal of the comparator It is connected with the control terminal of the relay, first input end of the temperature sensor also with the comparator is connected, the ratio The second input terminal compared with device is connected with temperature threshold end.

Further, the clock circuit being connected with the microcontroller main control module is further included.

Further, power circuit is further included, the power circuit is that the tandem type being made of three terminal integrated voltage stabilizer is straight Flow voltage-stabilized power supply circuit.

Further, the serial communication interface circuit being connected with the microcontroller main control module and liquid crystal display are further included Device.

Further, the temperature sensor includes platinum resistance Pt100 temperature sensors.

Further, the A/D converter includes the front end analogue tune being made of buffer and programmable-gain amplifier Economize on electricity road, sigma-delta modulator, programmable digital-filter.

Further, it is described silicon-controlled including thyristor and photoelectricity coupling bidirectional triode thyristor driver.

Further, the microcontroller main control module has flash memory in piece.

By the technical solution of above-described embodiment, the utility model can not only to the stepless control of heating unit power, It can realize and quantitative adjusting is carried out to heating power, moreover, being also provided with clock circuit, realize and Temperature-controlled appliance is run Time automatically controls, and control method is simple, safety, and the utility model is automatically controlled using microcontroller, control accuracy compared with Height, is not in harmonic pollution, avoids the malfunction for occurring causing and electric appliance being protected in same power grid, with serious pollution to damage electricity In net the problem of other electric appliances.

Brief description of the drawings

Can be more clearly understood the feature and advantage of the utility model by reference to attached drawing, attached drawing be schematically without It is interpreted as carrying out any restrictions to the utility model, in the accompanying drawings：

Fig. 1 is a kind of structural representation of SCM Based Temperature-controlled appliance in the utility model some embodiments Figure；

Fig. 2 is a kind of structural representation of SCM Based Temperature-controlled appliance in the utility model some embodiments Figure；

Fig. 3 is a kind of structural representation of SCM Based Temperature-controlled appliance in the utility model some embodiments Figure.

Embodiment

In order to be more clearly understood that the above-mentioned purpose of the utility model, feature and advantage, below in conjunction with the accompanying drawings and have The utility model is further described in detail in body embodiment.It should be noted that in the case where there is no conflict, this Shen The feature in embodiment and embodiment please can be mutually combined.

Many details are elaborated in the following description in order to fully understand the utility model, still, this practicality New to be implemented using other different from other modes described here, therefore, the scope of protection of the utility model is simultaneously From the limitation of following public specific embodiment.

The utility model in order to realize the quantitative adjusting to heating power, realize to Temperature-controlled appliance run time from Dynamic control, avoids the malfunction for occurring causing and electric appliance being protected in same power grid, with serious pollution to damage other electric appliances in power grid The problem of, as shown in Figure 1, there is provided a kind of SCM Based Temperature-controlled appliance 100, it includes microcontroller main control module 110th, silicon-controlled 120 and silicon-controlled 120 heating being electrically connected being electrically connected with the microcontroller main control module 110 Component 130, the A/D converter 140, electrical with the A/D converter 140 being electrically connected with the microcontroller main control module 110 The temperature sensor 150 of connection；The temperature sensor 150 and the heating element 130 are arranged in temperature control box 160.Pass through Temperature sensor 150 gathers the temperature value in the temperature control box 160, and the temperature value signal is passed to the monolithic owner Module 110 is controlled, the microcontroller main control module 110 controls the temperature value collected and setting value using existing control algolithm Silicon-controlled 120 switching frequency, realizes the heating power control to heating element 130, so that in the temperature control box 160 The temperature in portion realizes control.Improve temperature controlled precision and effectively reduce equipment manufacturing cost and cost.

The utility model controls failure in order to prevent, so that the temperature over-limit condition in temperature control box is caused, such as Fig. 2 institutes Show, the Temperature-controlled appliance 100 in the utility model further includes protection circuit 170, and the protection circuit 170 includes comparator 171 and relay 172, the input terminal of the relay 172 be connected with described silicon-controlled 120, the output terminal of the relay 172 It is connected with the heating element 130, the output terminal of the comparator 171 is connected with the control terminal of the relay 172, the temperature Spend first input end of the sensor 150 also with the comparator 171 to be connected, the second input terminal and temperature of the comparator 171 Threshold value end connects.The threshold temperature end is alternative using threshold voltage end either threshold current end.Pass through temperature sensing The temperature value that device 150 collects by comparator 171 compared with temperature extremes (being inputted by temperature threshold end), when adopting When the temperature value collected is more than temperature extremes, the comparator 171 produce signal cause the relay 172 input terminal and Output terminal it is separated so that described silicon-controlled 120 with the heating element 130 disconnect be electrically connected so that heating element 130 power-off are stopped, and protect the temperature control box 160.

In order to realize that temperature is quantitatively adjusted, the Temperature-controlled appliance 100 further includes and the microcontroller main control module 110 The clock circuit 180 of connection.

In order to be powered to all parts, the Temperature-controlled appliance 100 further includes power circuit 190, the power supply Circuit 190 is the series type direct current regulation source circuit being made of three terminal integrated voltage stabilizer.

Further include the serial communication interface circuit 1100 and liquid crystal display being connected with the microcontroller main control module 110 1110。

Preferably, the temperature sensor includes platinum resistance Pt100 temperature sensors.

Optionally, the front end analogue that the A/D converter includes being made of buffer and programmable-gain amplifier is adjusted Circuit, sigma-delta modulator, programmable digital-filter.

Optionally, it is described silicon-controlled including thyristor and photoelectricity coupling bidirectional triode thyristor driver.

Optionally, the microcontroller main control module has flash memory in piece.

As shown in Fig. 2, a kind of SCM Based Temperature-controlled appliance provided by the utility model, including microcontroller master control Module, temperature sensor, A/D converter is silicon-controlled, protects circuit, serial communication interface circuit, power circuit etc..Temperature control System processed extends external memory storage and forms main control module using AT89C52 microcontrollers as core.The temperature of temperature control box is by platinum resistance Pt100 temperature sensors detect and are converted into faint voltage signal, then are converted into counting by the A/D converter AD7705 of 16 Word amount.This digital quantity passes through after digital filtering, and the temperature of temperature control box on the one hand is passed through the liquid crystal display on control panel Show；On the other hand by the temperature value compared with the temperature value set, according to the size of its deviation, using PID Control algolithm carries out computing, (controls temperature control box to add finally by the break-make duty cycle in control bidirectional triode thyristor controlling cycle The size of hot mean power), and then to purpose that temperature control box temperature is controlled.If actually measured temperature value exceedes The limiting safe temperature that system gives, protection circuit can make a response, so as to protect temperature control box.

Further, preferably, the AT89C52 microcontrollers are a kind of new low-power consumption, high performance 8 CMOS Microcontroller, has a superpower three-level encryption function, and the programming of flash memory (Flash Memory) is with having wiped in its piece Full electricity consumption realizes that data are not volatile, and program/erase speed is fast.

Further, preferably, the temperature sensor Pt100 types platinum resistance is in the range of -200 DEG C to 850 DEG C One of highest temperature sensor of precision.Due in the present system, temperature-measuring range is larger (in room temperature between 600 DEG C), and will Ask accuracy of detection height, stability good, therefore select temperature sensor of the platinum resistance as this temperature control system.

Further, preferably, the A/D converter AD7705 is included by buffer and programmable-gain amplifier (PGA) front end analogue of composition adjusts the components such as circuit, sigma-delta modulator, programmable digital-filter composition.Using three line strings Line interface, has two fully differential input channels, can reach 0.003% nonlinear 16 exported without error code, its gain and defeated Go out the equal programmable of turnover rate, it is also an option that input analogue buffer, and self calibration and system calibration mode.

Further, preferably, it is described it is silicon-controlled be a kind of power semiconductor, abbreviation SCR, also referred to as thyristor. It is divided into one-way SCR and bidirectional triode thyristor, in Control System of Microcomputer, can be used as power drive device.And can in the system It is MOC3041 photoelectricity coupling bidirectional triode thyristor drivers that control silicon, which matches, and MOC3041 is a difference in that with general optocoupler Output par, c is the photosensitive bidirectional triode thyristor of silicon, silicon-controlled to be triggered when ensureing voltage close to zero also with zero cross fired detector.

Further, preferably, the effect of the protection circuit is to carry out overheat protector to temperature control box, when Pt100 is surveyed The temperature (voltage signal) obtained surpasses compared with the temperature limit signal set is through over-voltage comparator in the event of temperature control box temperature The situation of the limiting temperature of setting is crossed, disconnects resistive heater power supply, protects temperature control box.

Further, preferably, the serial communication interface circuit is realized string-and changed, message transmission rate is controlled, Error detection is carried out, carries out TTL and EIA level conversions, there is provided the signal wire required by EIA-RS-232 interface standards.

Further, preferably, the series type direct current regulation source that the power circuit is made of three terminal integrated voltage stabilizer There is provided.

The utility model provides a kind of SCM Based Temperature-controlled appliance, because it is simple and practical, cheap, At the same time again possess higher control accuracy, not only with it is easy to control, using simple and flexibility it is strong many advantages, such as, but also It can be significantly increased and meet the technical requirement of controlled temperature, so as to have greatly to the quality and quantity for improving product Help.Therefore, SCM Based temperature control system has good in terms of the temperature control problem in handling industrial production Application prospect.

In the utility model, term " first ", " second ", " the 3rd " are only used for description purpose, and it is not intended that referring to Show or imply relative importance.Term " multiple " refers to two or more, unless otherwise restricted clearly.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the present invention, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.

Claims (7)

1. a kind of SCM Based Temperature-controlled appliance, it is characterised in that including microcontroller main control module and the microcontroller Silicon-controlled and the silicon-controlled electric connection the heating element and the microcontroller main control module that main control module is electrically connected The A/D converter of electric connection, the temperature sensor being electrically connected with the A/D converter；The temperature sensor and described Heating element is arranged in temperature control box；Wherein, it is described silicon-controlled including thyristor and photoelectricity coupling bidirectional triode thyristor driver, it is described Temperature sensor includes platinum resistance Pt100 temperature sensors.

2. SCM Based Temperature-controlled appliance according to claim 1, it is characterised in that protection circuit is further included, The protection circuit includes comparator and relay, the input terminal of the relay and the silicon-controlled connection, the relay Output terminal be connected with the heating element, the output terminal of the comparator is connected with the control terminal of the relay, the temperature Spend first input end of the sensor also with the comparator to be connected, the second input terminal and the temperature threshold end of the comparator connect Connect.

3. SCM Based Temperature-controlled appliance according to claim 1 or 2, it is characterised in that further include with it is described The clock circuit of microcontroller main control module connection.

4. SCM Based Temperature-controlled appliance according to claim 1 or 2, it is characterised in that further include power supply electricity Road, the power circuit are the series type direct current regulation source circuit being made of three terminal integrated voltage stabilizer.

5. SCM Based Temperature-controlled appliance according to claim 1 or 2, it is characterised in that further include with it is described The serial communication interface circuit and liquid crystal display of microcontroller main control module connection.

6. SCM Based Temperature-controlled appliance according to claim 1 or 2, it is characterised in that the A/D converter Front end analogue including being made of buffer and programmable-gain amplifier adjusts circuit, sigma-delta modulator, programmable digital filter Ripple device.

7. SCM Based Temperature-controlled appliance according to claim 1 or 2, it is characterised in that the monolithic owner Controlling module has flash memory in piece.