CN103984375A - Temperature control system based on DSP and temperature sensor control and control method thereof - Google Patents
Temperature control system based on DSP and temperature sensor control and control method thereof Download PDFInfo
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- CN103984375A CN103984375A CN201410159430.8A CN201410159430A CN103984375A CN 103984375 A CN103984375 A CN 103984375A CN 201410159430 A CN201410159430 A CN 201410159430A CN 103984375 A CN103984375 A CN 103984375A
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Abstract
The invention discloses a temperature control system based on a data signal processor (DSP) and temperature sensor control and a control method thereof, and belongs to the technical field of temperature control. When isothermal heating control is adopted, the system comprises the DSP, a power supply, a temperature sensor, a control parameter input device and a parameter output recording controller. When heat flux heating control is adopted, a pulse width converter is additionally arranged on the basis of the original system. According to the temperature control system, temperature and heat flux density input setting is taken into consideration, and the functions of monitoring temperature of a controlled object and heating flux in real time and recording heating power are achieved.
Description
technical field
The present invention relates to a kind of based on DSP(digital signal processor) and temperature sensor temperature control system and the control method thereof controlled, temperature control technology field belonged to.
background technology
Heating system and temperature control system thereof are widely used in various equipment.Such as: in the equipment such as single crystal growing furnace, annealing furnace, electric oven, heat-treatment furnace, all need to use heating and temperature control system.The production of product and processing technology require the temperature of heating system to control within the specific limits.Temperature controlling range has guaranteed the qualification rate of product accurately.Not only controlled in the process that controlled warming-up device raises in temperature, but also will be after arriving set temperature value automatic feedback information to warming-up device, to regulate in time, add heat, make warming-up device keep temperature-resistant in certain hour section, or automatically regulate within the scope of certain temperature control precision.In addition, except the demand of the temperature controls such as equipment or product, also exist to wait to add the demand that heat is controlled, namely within the scope of certain hour, the heat that adds that equipment provides is constant, and its technical difficulty wants complicated with respect to isothermal heating.By equitemperature and etc. heat flux heating and control in conjunction with, a kind of new gentle control system that adds that can select voluntarily according to user's demand and will have certain application market.
summary of the invention
The invention provides a kind of temperature control system and control method thereof based on DSP and temperature sensor control.
The present invention adopts following technical scheme for solving its technical matters:
A kind of temperature control system based on DSP and temperature sensor control, comprise DSP, power supply, temperature sensor, control parameter input unit and parameter output recording controller, wherein controlling parameter input unit, DSP and parameter output recording controller is linked in sequence, DSP is connected with power supply, temperature sensor is arranged in controlled device, power supply is connected with controlled device, and the temperature sensor in controlled device is connected with the AD port of DSP by data line.
A kind of temperature control system based on DSP and temperature sensor control, comprise DSP, power supply, control parameter input unit, parameter output recording controller, temperature sensor and pulse width conversion device, temperature sensor is arranged in controlled device, controlling parameter input unit, DSP and parameter output recording controller is linked in sequence, the PWM port of DSP is connected with pulse width conversion device, temperature sensor in controlled device is connected with the AD port of DSP by data line, pulse width conversion device is connected to control power supply with power supply, power supply is connected with controlled device.
The control method of the temperature control system based on DSP and temperature sensor control, is characterized in that, comprises the following steps:
(1), while adopting isothermal to add heat control, first by control temperature, the temperature control precision value of controlling parameter input unit input controlled device, and switch on power; Gather the temperature sensor signal in controlled device, signal is compared with the temperature value of being inputted by control parameter input unit by the AD module converts of DSP, produce and feed back signal to AC power;
(2) if the temperature value gathering, higher than the control temperature of controlled device and the control accuracy sum of temperature, allows DSP send the instruction of deenergization; If the temperature value gathering is poor lower than the control temperature of controlled device and the control accuracy of temperature, allow DSP send the instruction switching on power.
The control method of the temperature control system based on DSP and temperature sensor control, is characterized in that, comprises the following steps:
(1) while adopting heat flux to add heat control, first by control temperature, PID control law and the temperature control precision value of controlling parameter input unit input controlled device; DSP sends signal to pulse width conversion device by the PWM port of DSP after receiving control inputs parameter, under 10% dutycycle, switches on power;
(2) gather the temperature sensor signal in controlled device, signal is compared with the temperature value of being inputted by control parameter input unit by the AD module converts of DSP, produce and feed back signal to DSP; (3) if the temperature value gathering, higher than the control temperature of controlled device and the control accuracy sum of temperature, allows DSP send the instruction that reduces dutycycle, by the PWM port transmission of DSP to pulse width conversion device the dutycycle with adjusting power supply; If the temperature value gathering is poor lower than the control temperature of controlled device and the control accuracy of temperature, allow DSP send the instruction that increases dutycycle, by the PWM port transmission of DSP to pulse width conversion device the dutycycle with adjusting power supply;
(4) when controlled device temperature is controlled within the scope of the control accuracy of controlling the input of parameter input unit, DSP send instruction by PWM port transmission to pulse width conversion device with locking power supply dutycycle, and export recording controller record duty cycle information now by parameter, reach the heat flux heating such as controlled device;
(5) once the dutycycle of power supply locking, controlled device the state of heat flux heating such as enters, until people stops for cutting off the electricity supply heating.
Beneficial effect of the present invention is as follows:
This system, without any the device of adjusting voltage or electric current, has been simplified control system, has reduced the cost of system constructing; The temperature signal that feeds back to processor is to be obtained by multipoint acquisition, has avoided local temperature sensor error temperature excessive and that produce to judge by accident; This faster system response, sample frequency is high, not only can realize the constant control of heating-up temperature, and can temperature reach after setting value etc. heat flux add heat control; Utilize pulse-length modulation (PWM) module and proportion integration differentiation (PID) control law of dsp processor that the dutycycle of power supply input is regulated and can be locked, the heat fluxs such as realization add temperature control; This system not only has the input of temperature and heat flow density concurrently and sets, and to being monitored in real time by the temperature of control object and heating hot-fluid, heating power writing function.
accompanying drawing explanation
Fig. 1 be based on DSP and temperature sensor, control etc. temperature control system sketch.
Fig. 2 be based on DSP and temperature sensor, control etc. heat flux control system sketch.
Fig. 3 is the process flow diagram that waits a kind of embodiment of temperature control of the present invention.
Fig. 4 is the process flow diagram of a kind of embodiment of controlling of the heat flux such as of the present invention.
embodiment
Below in conjunction with accompanying drawing, the invention is described in further details.
Take DSP TMS320 LF2407 as microprocessor be control core, use multipoint temperature sensor collection and be averaged formation feedback signal, by feedback signal and user preset controlling value, contrast, within the scope of certain control accuracy, heating-up temperature or these two kinds of type of heating of heating hot-fluid are controlled automatically, and had concurrently the functions such as temperature and heat flow density input setting, temperature and hot-fluid is monitored in real time, heating power record.
Deng temperature control system: adopt the input of 220V AC power, the AD(digital-to-analogue of dsp processor) temperature signal that module port temperature sensor gathers, temperature signal and the input value of controlling parameter input unit are compared, generation feeds back signal to the switch that DSP controls AC power, through switch, switches on and off control system temperature.
Etc. heat flux control system: waiting on the basis of temperature control system, increase the monitoring of control system input voltage, electric current, PWM module by dsp processor realizes and locking controlling the power supply input duty cycle that temperature reaches after design temperature, and the heat fluxs such as realization add temperature control.
To the concrete mode of the temperature controls such as controlled device enforcement as shown in Figure 1.By controlling parameter input unit, the control accuracy of the control temperature by control object and control temperature is required to be input in control system; K type thermocouple temperature sensor is delivered to the temperature signal at the temperature sensor place in controlled device the AD port of DSP; After contrasting the data of AD port processing and the control parameter of controlling parameter input unit and be input to DSP, judge, sends DSP the instruction of power supply and power-off to power supply; In these all control procedures, the time of Power supply, the parameters such as temperature of controlled device can be in real time by parameter output recording controller record.As shown in Figure 3, the T0 in figure represents the control temperature of controlled device to the concrete control flow of this embodiment, and Δ T is the control accuracy of temperature, and these two controlled quentity controlled variables are all inputted by controlling parameter input unit; T represents the temperature by the controlled device of K type thermocouple temperature sensor measurement.
The concrete mode that the heat fluxs such as controlled device enforcement are controlled as shown in Figure 2.By controlling parameter input unit, the control accuracy of the control temperature by control object and control temperature is required to be input in control system; K type thermocouple temperature sensor is delivered to the temperature signal at the temperature sensor place in controlled device the AD port of DSP; DSP by the data of AD port processing and after controlling control parameter that parameter input unit is input to DSP and contrasting, judge by the PWM port of DSP be combined pulse width conversion device to power supply with suitable dutycycle until control temperature and the precision of controlled device reach preset value; Locking dutycycle with etc. the type of heating operation whole system of heat flux until artificial finishing control; In these all control procedures, the time of Power supply, the temperature of controlled device, dutycycle, etc. heat flux heating add the parameters such as heat can be in real time by parameter output recording controller record.As shown in Figure 4, the T0 in figure represents the control temperature of controlled device to the concrete control flow of this embodiment, and Δ T is the control accuracy of temperature, and these two controlled quentity controlled variables are all inputted by controlling parameter input unit; T represents the temperature by the controlled device of K type thermocouple temperature sensor measurement.
Claims (4)
1. a temperature control system of controlling based on DSP and temperature sensor, it is characterized in that comprising DSP, power supply, temperature sensor, control parameter input unit and parameter output recording controller, wherein controlling parameter input unit, DSP and parameter output recording controller is linked in sequence, DSP is connected with power supply, temperature sensor is arranged in controlled device, power supply is connected with controlled device, and the temperature sensor in controlled device is connected with the AD port of DSP by data line.
2. the control method of the temperature control system based on DSP and temperature sensor control according to claim 1, is characterized in that, comprises the following steps:
(1), while adopting isothermal to add heat control, first by control temperature, the temperature control precision value of controlling parameter input unit input controlled device, and switch on power; Gather the temperature sensor signal in controlled device, signal is compared with the temperature value of being inputted by control parameter input unit by the AD module converts of DSP, produce and feed back signal to AC power;
(2) if the temperature value gathering, higher than the control temperature of controlled device and the control accuracy sum of temperature, allows DSP send the instruction of deenergization; If the temperature value gathering is poor lower than the control temperature of controlled device and the control accuracy of temperature, allow DSP send the instruction switching on power.
3. a temperature control system of controlling based on DSP and temperature sensor, it is characterized in that comprising DSP, power supply, control parameter input unit, parameter output recording controller, temperature sensor and pulse width conversion device, temperature sensor is arranged in controlled device, controlling parameter input unit, DSP and parameter output recording controller is linked in sequence, the PWM port of DSP is connected with pulse width conversion device, temperature sensor in controlled device is connected with the AD port of DSP by data line, pulse width conversion device is connected to control power supply with power supply, power supply is connected with controlled device.
4. the control method of the temperature control system based on DSP and temperature sensor control according to claim 3, is characterized in that, comprises the following steps:
(1) while adopting heat flux to add heat control, first by control temperature, PID control law and the temperature control precision value of controlling parameter input unit input controlled device; DSP sends signal to pulse width conversion device by the PWM port of DSP after receiving control inputs parameter, under 10% dutycycle, switches on power;
(2) gather the temperature sensor signal in controlled device, signal is compared with the temperature value of being inputted by control parameter input unit by the AD module converts of DSP, produce and feed back signal to DSP;
(3) if the temperature value gathering, higher than the control temperature of controlled device and the control accuracy sum of temperature, allows DSP send the instruction that reduces dutycycle, by the PWM port transmission of DSP to pulse width conversion device the dutycycle with adjusting power supply; If the temperature value gathering is poor lower than the control temperature of controlled device and the control accuracy of temperature, allow DSP send the instruction that increases dutycycle, by the PWM port transmission of DSP to pulse width conversion device the dutycycle with adjusting power supply;
(4) when controlled device temperature is controlled within the scope of the control accuracy of controlling the input of parameter input unit, DSP send instruction by PWM port transmission to pulse width conversion device with locking power supply dutycycle, and export recording controller record duty cycle information now by parameter, reach the heat flux heating such as controlled device;
(5) once the dutycycle of power supply locking, controlled device the state of heat flux heating such as enters, until people stops for cutting off the electricity supply heating.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107456068A (en) * | 2017-09-19 | 2017-12-12 | 广东美的厨房电器制造有限公司 | Control method, control device and the cooking apparatus of cooking apparatus |
| CN107544338A (en) * | 2017-09-19 | 2018-01-05 | 广东美的厨房电器制造有限公司 | Control method, control device and the cooking apparatus of cooking apparatus |
| CN110157896A (en) * | 2019-05-09 | 2019-08-23 | 佛山市华信微晶金属有限公司 | A kind of crystallization exothermic temperature controller and its control method with learning functionality |
| CN113252493A (en) * | 2021-07-13 | 2021-08-13 | 中国飞机强度研究所 | Control method of thermal strength test system |
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| US20020090012A1 (en) * | 2001-01-05 | 2002-07-11 | Richard Kroeger | Thermoelectric cooler driver utilizing unipolar pulse width modulated synchronous rectifiers |
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