CN113296559A - Self-adaptive electric heating constant temperature controller and constant temperature control method - Google Patents
Self-adaptive electric heating constant temperature controller and constant temperature control method Download PDFInfo
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Abstract
The invention discloses a self-adaptive electric heating thermostatic controller and a thermostatic control method, which comprise a processor, a temperature sensor, a power heating controller and a heating device, wherein the temperature sensor is electrically connected with the processor and is used for acquiring the current temperature information of equipment and transmitting the temperature information to the processor; the heating device is electrically connected with the processor through the power heating controller, and the processor is used for analyzing the received current temperature information and controlling the output power of the heating device through the power heating controller; the heating device is used for heating and constant temperature equipment, and the processor sets for the difference of temperature according to the current temperature of equipment and constant temperature, changes heating device's output's mode heating device in real time, makes equipment reach the constant temperature and sets for the temperature value to make equipment keep the constant temperature state, change heating device's output simultaneously and make heating efficiency maximize, when having reduced the energy consumption and ensured the heating effect.
Description
Technical Field
The invention relates to the technical field of constant temperature control equipment, in particular to an adaptive electric heating constant temperature controller and a constant temperature control method.
Background
In some industrial occasions, equipment leads to equipment can not normal use in cold environment, if in the gas pipeline field of carrying, the commander voltage regulator can freeze in cold environment, can cause the jam in the pipeline, leads to the unable normal work of commander voltage regulator, so in order to ensure the normal work of equipment, only heats equipment.
The current universal heating controller adopts a switching relay output control mode, the operation mode of the switching relay output control mode is power-on heating and power-off cooling, the mode is simple and direct in control and low in cost, but the heating controller can only be used in occasions with low temperature requirements and cannot be used in occasions with constant temperature requirements; because temperature control is a more inertial process, it is not a timely effective control logic. Therefore, the temperature may rise and fall even after the heating is turned on or off, resulting in hysteresis. Therefore, when the temperature is actually controlled by the thermostat with switch output, the actual temperature of heating is not the temperature set by the user, but is a fluctuant temperature curve which basically takes the set temperature as the midpoint. And the fluctuation of the temperature curve is changed according to the ambient temperature, so that the output control mode of the switch relay in the prior art cannot meet the use requirement of equipment with high constant temperature requirement.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a self-adaptive electric heating constant temperature controller and a constant temperature control method, which solve the problems that the temperature has hysteresis and cannot be constant when the heating controller in the prior art heats.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
providing an adaptive electrically heated thermostat controller comprising a processor, a temperature sensor, a power heating controller, and a heating device;
the temperature sensor is electrically connected with the processor and used for acquiring the current temperature information of the equipment and transmitting the temperature information to the processor;
the heating device is electrically connected with the processor through the power heating controller, and the processor is used for analyzing the received current temperature information and controlling the output power of the heating device through the power heating controller; the heating device is used for heating and thermostating equipment.
Further, the power heating controller controls the output power of the heating device by changing the current or voltage of the heating device.
Preferably, the heating means is an electrical heating rod.
Furthermore, the self-adaptive electric heating constant temperature controller also comprises a touch display and a memory which are both electrically connected with the processor, wherein the touch display is used for displaying the temperature value of the temperature sensor and adjusting the constant temperature setting temperature value through the processor; the memory is used for recording temperature data and data when the processor carries out data analysis and calculation.
The scheme also provides a constant temperature control method of the self-adaptive electric heating constant temperature controller, which comprises the following steps:
step 1: starting the self-adaptive electric heating constant temperature controller;
step 2: setting a constant temperature set temperature value through a touch display, and transmitting set temperature value information to a processor;
and step 3: the temperature sensor acquires the current temperature numerical value information of the equipment and transmits the acquired temperature numerical value information to the processor;
and 4, step 4: the processor analyzes and compares whether the current temperature value of the equipment is lower than a constant temperature set temperature value, if so, the step 5 is carried out, otherwise, the step 6 is carried out;
and 5: according to the difference value between the constant temperature setting temperature value and the current temperature value of the equipment, the processor controls the power heating controller to continuously adjust the output power of the heating device according to the difference value, and the equipment is heated to the constant temperature setting temperature;
step 6: the processor controls the power heating controller to reduce the voltage or current of the heating device and reduce the output power of the heating device so as to cool the equipment to a constant temperature set temperature;
when the difference value between the constant temperature set temperature value and the current temperature value of the equipment is large, the heating device does not work to realize rapid cooling of the equipment, and when the difference value between the constant temperature set temperature value and the current temperature value of the equipment is small, the heating device reduces the power to slowly cool the equipment;
and 7: and (5) repeating the step (3-6), and continuously adjusting the heating power of the heating device by the processor to enable the temperature position of the equipment to be at a set temperature value and keep a constant temperature state.
Further, the method for changing the output power of the heating device by the processor comprises the following steps:
step S1: every time through a period of set time, gather the difference of once current detection temperature value and settlement temperature value, in the time of setting for, gather the offset many times to carry out the deviation integral to a plurality of offsets:
in the formula, II is deviation integral, n is acquisition frequency, and the deviation integral is used for judging the adjustment of the heating power amplitude of the heating device each time;
step S2: according to the deviation difference between the last deviation value and the current deviation value;
D_Err＝Err-LT_Err
in the formula, D _ Err is a deviation difference value, LT _ Err is a last deviation value, and the deviation difference value is used for judging the speed of temperature change of the equipment, namely the temperature rise speed, and is used for prejudging the output power of the heating device;
step S3: obtaining the current output power of the heating element according to the current deviation value, the deviation integral and the deviation difference value in the steps 51, S1 and S2;
P＝PP*Err+II*k+DD*D_Err
wherein P is the current output power of the heating element (3); taking PP as an amplification factor, and taking a value according to the output power of the current heating rod, wherein the value range of PP is 1-50; DD is a differential coefficient and has a value range of 50-300.
Further, the method for the processor to control the power heating controller to adjust the output power of the heating device comprises the following steps: when the output power P of the current heating device is known from step S3, assuming that the resistance of the heating device is R, then:
in the formula, P is the output power of the current heating device, U is the voltage of the heating device, and the power heating controller matches the corresponding voltage of the heating device according to the output power of the current heating device.
The invention has the beneficial effects that: the output power of the heating device is changed to replace the traditional switch control mode in the scheme; the control of switch mode, its heating power is invariable, can not change, can cause the heating to exceed the condition that constant temperature set temperature numerical value, the cooling is less than the setting value again, and in this scheme, the treater is according to the difference of equipment current temperature and constant temperature set temperature, the difference then increases heating device's output power greatly, the difference is little then reduces heating device's output power, change heating device's output power's mode heating equipment in real time, make equipment reach constant temperature set temperature value, and make equipment keep the constant temperature state, change heating device's output power simultaneously and make heating efficiency maximize, when having reduced the energy consumption and ensured the heating effect, when having solved the heating controller heating among the prior art, the temperature has the hysteresis, the problem that the temperature can not be invariable.
Drawings
FIG. 1 is a functional schematic diagram of an adaptive electrically heated thermostat controller.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in FIG. 1, the invention provides an adaptive electric heating thermostatic controller, which comprises a processor, a temperature sensor, a power heating controller and a heating device;
the temperature sensor is electrically connected with the processor and used for acquiring the current temperature information of the equipment and transmitting the temperature information to the processor;
the heating device is electrically connected with the processor through the power heating controller, and the processor is used for analyzing the received current temperature information and controlling the output power of the heating device through the power heating controller; the heating device is used for heating and thermostating equipment.
The power heating controller controls the output power of the heating device by changing the current or voltage of the heating device. The heating device is an electric heating rod.
The self-adaptive electric heating constant temperature controller also comprises a touch display and a memory which are both electrically connected with the processor, wherein the touch display is used for displaying the temperature value of the temperature sensor and adjusting the constant temperature set temperature value through the processor; the memory is used for recording temperature data and data when the processor carries out data analysis calculation.
In the scheme, the processor is a brain of the whole controller, acquires a current temperature value in real time through a temperature sensor, records a temperature heating speed and current output control power into a memory after processing, then calls corresponding control logic data to perform comprehensive operation analysis according to the temperature heating speed and combining the current acquired latest temperature value as conditions to obtain the output power required to be applied to the heating device, and increases the output power of the heating device for heating when the acquired temperature value is lower than a constant temperature set temperature value; when the acquired temperature value is higher than the constant temperature set temperature value, the output power of the heating device is reduced; when the collected temperature value is close to the constant temperature set temperature value, the temperature is supplemented and kept constant, and finally the output power of the current heating device is implemented to the heating device through the power heating controller, so that the heating device generates heat to heat the equipment, and the operation is repeated, so that the heating temperature of the heating device is constant at the set temperature value.
In the scheme, the processor can be a PLC single chip microcomputer, the temperature sensor can be an XMTD-6000/7000 temperature controller, the heating device is an SC-02-39 heating rod, the touch display is a 7-inch industrial tablet personal computer, the power heating controller can be an ST6-SCR three-phase digital display voltage power regulator, the connection relation and the selection among electrical elements in the scheme are the existing mature technology, and therefore the circuit structure and the working principle among the electrical elements are not repeated herein.
The scheme also provides a constant temperature control method of the self-adaptive electric heating constant temperature controller, which comprises the following steps:
step 1: starting the self-adaptive electric heating constant temperature controller;
step 2: setting a constant temperature set temperature value through a touch display, and transmitting set temperature value information to a processor;
and step 3: the temperature sensor acquires the current temperature numerical value information of the equipment and transmits the acquired temperature numerical value information to the processor;
and 4, step 4: the processor analyzes and compares whether the current temperature value of the equipment is lower than a constant temperature set temperature value, if so, the step 5 is carried out, otherwise, the step 6 is carried out;
and 5: according to the difference value between the constant temperature setting temperature value and the current temperature value of the equipment, the processor controls the power heating controller to continuously adjust the output power of the heating device according to the difference value, and the equipment is heated to the constant temperature setting temperature;
step 6: the processor controls the power heating controller to reduce the voltage or current of the heating device and reduce the output power of the heating device so as to cool the equipment to a constant temperature set temperature;
when the difference value between the constant temperature set temperature value and the current temperature value of the equipment is large, the heating device does not work to realize rapid cooling of the equipment, and when the difference value between the constant temperature set temperature value and the current temperature value of the equipment is small, the heating device reduces the power to slowly cool the equipment; because the temperature of the external environment of the equipment can influence the temperature of the equipment, the cooling speed is high, and if the heating power of the heating device is insufficient, the temperature of the equipment can also gradually drop, so that the heating and cooling are matched.
And 7: and (5) repeating the step (3-6), and continuously adjusting the heating power of the heating device by the processor to enable the temperature position of the equipment to be at a set temperature value and keep a constant temperature state.
Further, the method for changing the output power of the heating device by the processor comprises the following steps:
step S1: every time through a period of set time, gather the difference of once current detection temperature value and settlement temperature value, in the time of setting for, gather the offset many times to carry out the deviation integral to a plurality of offsets:
in the formula, II is deviation integral, n is acquisition frequency, and the deviation integral is used for judging the adjustment of the heating power amplitude of the heating device each time;
step S2: according to the deviation difference between the last deviation value and the current deviation value;
D_Err＝Err-LT_Err
in the formula, D _ Err is a deviation difference value, LT _ Err is a last deviation value, and the deviation difference value is used for judging the speed of temperature change of the equipment, namely the temperature rise speed, and is used for prejudging the output power of the heating device;
step S3: obtaining the current output power of the heating element according to the current deviation value, the deviation integral and the deviation difference value in the steps 51, S1 and S2;
P＝PP*Err+II*k+DD*D_Err
wherein P is the current output power of the heating element (3); taking PP as an amplification factor, and taking a value according to the output power of the current heating rod, wherein the value range of PP is 1-50; DD is a differential coefficient and has a value range of 50-300.
Further, the method for the processor to control the power heating controller to adjust the output power of the heating device comprises the following steps: when the output power P of the current heating device is known from step S3, assuming that the resistance of the heating device is R, then:
in the formula, P is the output power of the current heating device, U is the voltage of the heating device, and the power heating controller matches the corresponding voltage of the heating device according to the output power of the current heating device.
The constant temperature control method in the scheme comprises the following steps: the output power of the heating device is changed to replace the traditional switch control mode; the control of switch mode, its heating power is invariable, can not change, can cause the heating to exceed the condition that constant temperature set temperature numerical value, the cooling is less than the setting value again, and in this scheme, the treater is according to the difference of equipment current temperature and constant temperature set temperature, the difference then increases heating device's output power greatly, the difference is little then reduces heating device's output power, change heating device's output power's mode heating equipment in real time, make equipment reach constant temperature set temperature value, and make equipment keep the constant temperature state, change heating device's output power simultaneously and make heating efficiency maximize, when having reduced the energy consumption and ensured the heating effect, when having solved the heating controller heating among the prior art, the temperature has the hysteresis, the problem that the temperature can not be invariable.
Claims (8)
1. An adaptive electric heating thermostatic controller is characterized by comprising a processor, a temperature sensor, a power heating controller and a heating device;
the temperature sensor is electrically connected with the processor and used for acquiring the current temperature information of the equipment and transmitting the temperature information to the processor;
the heating device is electrically connected with the processor through the power heating controller, and the processor is used for analyzing the received current temperature information and controlling the output power of the heating device through the power heating controller; the heating device is used for heating and thermostating equipment.
2. The adaptive electrically heated thermostat controller of claim 1 wherein the power heating controller controls the output power of the heating device by varying the current or voltage of the heating device.
3. The adaptive electrically heated thermostat controller of claim 1, wherein the heating device is an electrically heated wand.
4. The adaptive electrically heated thermostat controller of claim 1, further comprising a touch display and a memory both electrically connected to the processor, the touch display being configured to display a temperature value of the temperature sensor and to adjust a thermostat setting temperature value via the processor; the memory is used for recording temperature data and data when the processor carries out data analysis and calculation.
5. The thermostat control method of the adaptive electric-heating thermostat controller according to any one of claims 1 to 4, characterized by comprising the steps of:
step 1: starting the self-adaptive electric heating constant temperature controller;
step 2: setting a constant temperature set temperature value through a touch display, and transmitting set temperature value information to a processor;
and step 3: the temperature sensor acquires the current temperature numerical value information of the equipment and transmits the acquired temperature numerical value information to the processor;
and 4, step 4: the processor analyzes and compares whether the current temperature value of the equipment is lower than a constant temperature set temperature value, if so, the step 5 is carried out, otherwise, the step 6 is carried out;
and 5: according to the difference value between the constant temperature setting temperature value and the current temperature value of the equipment, the processor controls the power heating controller to continuously adjust the output power of the heating device according to the difference value, and the equipment is heated to the constant temperature setting temperature;
step 6: the processor controls the power heating controller to reduce the voltage or current of the heating device and reduce the output power of the heating device so as to cool the equipment to a constant temperature set temperature;
and 7: and (5) repeating the step (3-6), and continuously adjusting the heating power of the heating device by the processor to enable the temperature position of the equipment to be at a set temperature value and keep a constant temperature state.
6. A thermostat control method of an adaptive electric-heating thermostat controller according to claim 5, wherein the processor controls the output power of the heating device according to the difference in step 5, including the steps of:
step 51: obtaining the deviation value according to the current temperature and the constant temperature setting temperature of the equipment:
Err＝ST-CT
in the formula, Err is the current deviation value, ST is the constant temperature setting temperature, CT is the current temperature of the equipment, and the obtained current deviation value is recorded in a memory;
step 52: if the deviation value is larger, the processor controls the power heating controller to increase the output power of the heating device, and if the deviation value is smaller, the processor decreases the output power of the heating device;
step 53: after the output power of the heating device is changed, the temperature acquired by the temperature sensor after the equipment is changed is compared with the constant temperature set temperature, and the steps 51 and 52 are repeated for many times, so that the current temperature of the equipment is continuously corrected, the current temperature value of the equipment is continuously close to the constant temperature set temperature, and the current temperature value of the equipment is the same as the constant temperature set temperature.
7. A method for thermostat control in an adaptive electrically heated thermostat as claimed in claim 6 wherein the method for the processor to vary the output power of the heating means includes the steps of:
step S1: every time through a period of set time, gather the difference of once current detection temperature value and settlement temperature value, in the time of setting for, gather the offset many times to carry out the deviation integral to a plurality of offsets:
in the formula, II is deviation integral, n is acquisition frequency, and the deviation integral is used for judging the adjustment of the heating power amplitude of the heating device each time;
step S2: according to the deviation difference between the last deviation value and the current deviation value;
D_Err＝Err-LT_Err
in the formula, D _ Err is a deviation difference value, LT _ Err is a last deviation value, and the deviation difference value is used for judging the speed of the temperature change of the equipment and pre-judging the output power of the heating device;
step S3: obtaining the current output power of the heating element according to the current deviation value, the deviation integral and the deviation difference value in the steps 51, S1 and S2;
P＝PP*Err+II*k+DD*D_Err
wherein P is the current output power of the heating element (3); taking PP as an amplification factor, and taking a value according to the output power of the current heating rod, wherein the value range of PP is 1-50; DD is a differential coefficient and has a value range of 50-300.
8. The thermostat control method of the adaptive electric-heating thermostat controller according to claim 7, wherein the method for the processor to control the power heating controller to adjust the output power of the heating device comprises: when the output power P of the current heating device is known from step S3, assuming that the resistance of the heating device is R, then:
in the formula, P is the output power of the current heating device, U is the voltage of the heating device, and the power heating controller matches the corresponding voltage of the heating device according to the output power of the current heating device.
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Cited By (4)
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| CN114995556A (en) * | 2022-07-27 | 2022-09-02 | 山东齐能电器有限公司 | Intelligent control system for electric food warmer operation based on data analysis |
| CN115202413A (en) * | 2022-08-31 | 2022-10-18 | 月立集团有限公司 | Temperature control method and device for dry ironing equipment |
| CN115308978A (en) * | 2022-08-05 | 2022-11-08 | 郑州森鹏电子技术股份有限公司 | Design method for heating and defrosting function of vehicle-mounted camera |
| CN115308978B (en) * | 2022-08-05 | 2024-05-28 | 郑州森鹏电子技术股份有限公司 | Design method for heating and defrosting functions of vehicle-mounted camera |
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