CN107943158B - Intelligent heating control card capable of adaptively adjusting power output and control method thereof - Google Patents
Intelligent heating control card capable of adaptively adjusting power output and control method thereof Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 119
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- 229910052710 silicon Inorganic materials 0.000 claims abstract description 23
- 239000010703 silicon Substances 0.000 claims abstract description 23
- 230000007613 environmental effect Effects 0.000 claims abstract description 16
- 230000003044 adaptive effect Effects 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 7
- 230000005693 optoelectronics Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 2
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
- G05D23/32—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature with provision for adjustment of the effect of the auxiliary heating device, e.g. a function of time
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1917—Control of temperature characterised by the use of electric means using digital means
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Abstract
The invention discloses an intelligent heating control card capable of adaptively adjusting power output and a control method thereof, and relates to the technical field of temperature control. This control card includes: 16 paths of photoelectric isolation silicon controlled output ends, a current transformer, a voltage transformer, a temperature sensor and a microprocessor. The invention adopts the relevant variables of the actual power, the power supply voltage and the environmental temperature change of each heating control point, automatically adjusts the power output of the temperature control point under the condition of certain set power through a relevant algorithm, so that the actual output heating power is consistent with the set power, the temperature reaches the accurate control, and the temperature control mode has the advantages of less investment, simplicity, reliability, stability and convenient installation and debugging.
Description
Technical Field
The invention relates to the technical field of temperature control, in particular to an intelligent heating control card capable of adaptively adjusting power output and a control method thereof.
Background
The traditional temperature control mostly adopts a PID closed-loop control mode of thermocouple acquisition field temperature feedback, the temperature control mode is suitable for the conditions of few temperature control points and uncomplicated wiring, the mode adopted by a large number of temperature control points is high in cost, the thermocouple detection is hardly guaranteed by the fact that a large number of thermocouples and strong electricity are arranged together, and the interference at any time causes the whole temperature control system to become unstable. The main reasons influencing the stability of temperature control are the power of heating elements, the supply voltage and the environmental temperature change.
In summary, the temperature control in the prior art has the problems of high cost and poor stability of the temperature control system.
Disclosure of Invention
The embodiment of the invention provides an intelligent heating control card capable of adaptively adjusting power output and a control method thereof, which are used for solving the problems of high cost and poor stability of a temperature control system in the prior art.
The embodiment of the invention provides an intelligent heating control card capable of adaptively adjusting power output, which comprises: the photoelectric isolation 16-path silicon controlled rectifier output end, the current transformer, the voltage transformer, the temperature sensor and the microprocessor;
the output ends of the photoelectric isolation 16 paths of controllable silicon are respectively connected with 16 heating channels of a heating power grid;
the current transformer is used for detecting the current of each heating channel in a time-sharing manner;
the voltage transformer is used for detecting the voltage of each heating channel in a time-sharing manner;
the temperature sensor is used for detecting the ambient temperature;
the microprocessor is used for obtaining the actual power of each heating channel according to the current and the voltage of each heating channel; and the self-adaptive control power is output through the photoelectric isolation 16-path silicon controlled rectifier output end according to the actual power of each heating channel, the preset power of each heating channel, the dynamic power supply voltage of each heating channel and the ambient temperature.
The utility model provides a self-adaptation regulation power output intelligence heating control card which characterized in that, 16 way silicon controlled rectifier output terminals of optoelectronic isolation include: the output end of the first photoelectric isolation 8-path silicon controlled rectifier and the output end of the second photoelectric isolation 8-path silicon controlled rectifier; the first photoelectric isolation 8-path silicon controlled rectifier output end (51) is a power output end with adaptive adjustment time and duty ratio adjustment, and the second photoelectric isolation 8-path silicon controlled rectifier output end (52) is a power output end with adaptive adjustment PWM adjustment.
Preferably, the microprocessor is also electrically connected with a 485 communication interface; and the 485 communication interface is used for connecting another self-adaptive power output adjusting intelligent heating control card.
Preferably, the microprocessor is also electrically connected to a data memory.
Preferably, the microprocessor is also electrically connected with the power management module.
Preferably, the microprocessor is further electrically connected with an integrated electricity metering chip, and the integrated electricity metering chip is respectively electrically connected with the current transformer and the voltage transformer.
Preferably, the microprocessor is also electrically connected with the 16-way photoelectric isolation input end; and the photoelectric isolation 16 input ends are used for detecting the short circuit and the open circuit of each heating channel in real time.
The embodiment of the invention provides a control method of an intelligent heating control card capable of adaptively adjusting power output, which comprises the following steps:
step 1: acquiring the actual power of each heating channel in a time-sharing manner;
step 2: acquiring the dynamic power supply voltage of each heating channel;
and step 3: acquiring an ambient temperature;
and 4, step 4: determining the heating power and the power supply voltage change voltage regulation power output through a formula (1);
and 5: determining the adjusting power quantity of the environmental temperature change through a formula (2);
step 6: determining an adaptive regulation power output by formula (3);
the formula (1) is as follows:
heating power and supply voltage change voltage regulation power output is a heating power rated value, power set value, standard power and standard power/(measured voltage and measured power);
the formula (2) is as follows:
the environmental temperature change adjusting power quantity is (reference environmental temperature-environmental temperature) adjusting coefficient;
the formula (3) is as follows:
and (3) self-adaptive adjusting power output, namely environment temperature change adjusting power quantity + heating power and supply voltage change voltage regulation power output.
Preferably, an embodiment of the present invention provides a control method for an intelligent heating control card with adaptive power output adjustment, further including: controlling the temperature of the self-adaptive adjusting power output in a mode of controlling the self-adaptive adjusting time to account for the control ratio; wherein, the time accounts for the control ratio output, including: the 1 second time period is divided into 1000 equal parts for time pulse width modulation power output.
Preferably, an embodiment of the present invention provides a control method for an intelligent heating control card with adaptive power output adjustment, further including: controlling the temperature of the self-adaptive adjusting power output in a mode of regulating power output by self-adaptive adjusting PWM; wherein, the PWM power regulation output comprises: and taking the pulse train with each pulse width equal as a PWM waveform to regulate power output.
In the embodiment of the invention, an intelligent heating control card capable of adaptively adjusting power output and a control method thereof are provided, and compared with the prior art, the intelligent heating control card has the following beneficial effects:
in order to realize the stable and controllable control of each temperature control point and reduce the control cost of equipment, the invention adopts the relevant variables of the actual power, the power supply voltage and the environmental temperature change of each heating control point, and automatically adjusts the power output of the temperature control points under the condition of certain set power through a relevant algorithm, so that the actual output heating power is consistent with the set power, and the temperature is accurately controlled. The temperature control mode has the advantages of low investment, simplicity, reliability, stability and convenient installation and debugging.
Drawings
Fig. 1 is a schematic block diagram of an adaptive control power output intelligent heating control card according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a control method of an adaptive control power output intelligent heating control card according to an embodiment of the present invention;
fig. 3 is an application wiring diagram of an intelligent heating control card capable of adaptively adjusting power output according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a diagram of an intelligent heating control card capable of adaptively adjusting power output according to an embodiment of the present invention. As shown in fig. 1, the control card comprises: 16 paths of photoelectric isolation silicon controlled output ends, a current transformer 1, a voltage transformer 2, a temperature sensor 3 and a microprocessor 4.
Specifically, the output ends of the photoelectric isolation 16-path silicon controlled rectifiers are respectively connected with 16 heating channels of a heating power grid; the current transformer 1 is used for detecting the current of each heating channel in a time-sharing manner; the voltage transformer 2 is used for detecting the voltage of each heating channel in a time-sharing manner; a temperature sensor 3 for detecting an ambient temperature; the microprocessor 4 is used for obtaining the actual power of each heating channel according to the current and the voltage of each heating channel; and the self-adaptive control power is output through the photoelectric isolation 16-path silicon controlled rectifier output end according to the actual power of each heating channel, the preset power of each heating channel, the dynamic power supply voltage of each heating channel and the ambient temperature.
It should be noted that the present invention uses a digital temperature sensor, an ARM processor and the digital temperature sensor to communicate, and detects the ambient temperature.
It should be noted that the 16-channel thyristor output of the invention adopts a photoelectric isolator to isolate strong current and weak current parts, and eliminates the interference of strong current to the system.
Preferably, the optoelectronic isolation 16 silicon controlled rectifier output ends include: a first photo-isolation 8-way thyristor output terminal 51 and a second photo-isolation 8-way thyristor output terminal 52; the first photoelectric isolation 8-way silicon controlled output end 51 is a power output end with adaptive adjustment time, a duty ratio and adjustment power, and the second photoelectric isolation 8-way silicon controlled output end 52 is a power output end with adaptive adjustment PWM.
Preferably, the microprocessor 4 is also electrically connected with the 485 communication interface 6; and the 485 communication interface 6 is used for connecting another self-adaptive power output adjusting intelligent heating control card. RS485 communication is adopted, and the communication device has the characteristics of long communication distance and strong anti-interference capability.
Preferably, the microprocessor 4 is also electrically connected to a data memory 7. The ferroelectric processor can store data for up to 50 years.
Preferably, the microprocessor 4 is also electrically connected to the power management module 8. The high-efficiency switching power supply is adopted to output 3.3V and 5V2 paths of voltage to the processor and peripheral spare parts, so that the temperature rise on the control panel is reduced.
Preferably, the microprocessor 4 is further electrically connected to the integrated electricity metering chip 9, and the integrated electricity metering chip 9 is electrically connected to the current transformer 1 and the voltage transformer 2, respectively.
Preferably, the microprocessor 4 is also electrically connected with the optoelectronic isolation 16-way input end 10; and the photoelectric isolation 16-path input end 10 is used for isolating strong current and weak current parts by adopting a photoelectric isolator and detecting short circuit and open circuit of each heating channel in real time.
It should be noted that, the microprocessor 4 adopts an ARM chip processor to have a 16-path PWM output function, which can meet the requirement of hardware to realize heating and power adjustment; the system has a processing speed of 72 Mm, and can effectively ensure communication, data processing and real-time adaptive adjustment and output processing of 16 heating channels.
It should be noted that the A, B phase voltages, 16 heating channel powers and the total power consumption are automatically detected by the integrated electricity metering chip 9, the current transformer 1 and the voltage transformer 2. The system is used for detecting the power of the heating channel, and after the power output is stable, the system automatically detects the current of the channel and the special chip for electric quantity automatically calculates the output power of the channel after each phase of each heating channel is respectively electrified by time sharing (for example, every 0.5 second, the time range can be set between 0.1 and 2 seconds). Wherein, as shown in fig. 3, A, B are respectively two phases of different power supply incoming lines, N is a zero line, a phase provides channels 1-8 with heating power supply, and B phase provides channels 9-16 with heating power supply; a, B two phases on the heating control card circuit board are respectively provided with a current transformer and a voltage sensor; when the device works, the current transformer and the voltage sensor heat the control card for real-time detection, so that the power supply voltage of each phase and the power consumption of 16 channels can be detected in real time (measured by a power chip); when the power of each heating channel is detected, all channels are stopped to be heated, each channel is electrified when each phase is respectively carried out (if the electrification is stopped for 1 second, the next channel is electrified), and therefore the power of each channel can be calculated through the current of each channel and each phase voltage.
The principle of the invention is as follows: the modularized integrated combined design mode is adopted, each heating control card has 16 output channels, each heating control card supplies power for two phases, each phase controls 8 channels, the rated voltage of each channel is 220V output, the maximum current output by the controllable silicon is generally less than 30 amperes, and the plurality of heating control cards are connected in a 485 communication mode through a bottom plate bus; the heating control card can record the total power consumption of 16 channels; the heating control card can detect the voltage and the current of the two-phase power supply in real time and can detect the actual power of each heating channel; the heating control card can detect the ambient temperature of one path. Two temperature control modes of self-adaptive time adjustment, duty ratio control and self-adaptive PWM power adjustment output are provided.
Fig. 2 is a schematic diagram illustrating a control method of an adaptive control power output intelligent heating control card according to an embodiment of the present invention; as shown in fig. 2, the method includes:
step 1: and acquiring the actual power of each heating channel in a time-sharing manner.
Step 2: and acquiring the dynamic power supply voltage of each heating channel.
And step 3: and acquiring the ambient temperature.
And 4, step 4: and determining the heating power and the power supply voltage change voltage regulation power output by the formula (1).
Equation (1) is as follows:
heating power and supply voltage change voltage regulation power output is heating power rated value power set value standard power/(measured voltage measured power).
And 5: by the formula (2), the ambient temperature change adjustment power amount is determined.
Equation (2) is as follows:
the ambient temperature change adjusts the power quantity (reference ambient temperature-ambient temperature) and adjusts the coefficient.
Step 6: by equation (3), the adaptive modulation power output is determined.
Equation (3) is as follows:
and (3) self-adaptive adjusting power output, namely environment temperature change adjusting power quantity + heating power and supply voltage change voltage regulation power output.
Preferably, the temperature of the self-adaptive adjusting power output is controlled by an output mode with a self-adaptive adjusting time accounting for a control ratio; wherein, the time accounts for the control ratio output, including: the 1 second time period is divided into 1000 equal parts for time pulse width modulation power output.
Preferably, the temperature of the self-adaptive adjusting power output is controlled by a mode of self-adaptive adjusting PWM power adjusting output; wherein, the PWM power regulation output comprises: and taking the pulse train with each pulse width equal as a PWM waveform to regulate power output.
Specifically, the invention provides two optional temperature control modes different from the traditional temperature control (namely, the temperature detection PID control is additionally arranged at each control point):
the first mode is as follows: the method comprises the steps of outputting temperature control with self-adaptive adjusting time-occupying control ratio and adjusting power by time pulse width. Wherein, the time accounts for the control ratio output: the computer divides the time period of 1 second (the time range can be set between 0.5 and 10 seconds) into 1000 equal parts (each equal part is 1 millisecond) to carry out the time pulse width modulation method, and the heating control point power is set to be 50 percent of the existing power at 500 moment.
The second mode is as follows: the power regulation method with self-adaptive PWM power regulation, output temperature control and controllable silicon output power regulation. Wherein, PWM adjusts power output: the method is characterized in that the pulse train with equal pulse width is used as PWM waveform output by programming a computer, and rectangular wave is generated by changing the pulse width and is output to a heating control point, so that the purpose of adjusting the power output of the heating control point can be achieved.
It should be noted that, two methods with adaptive regulation output control temperature, firstly, the intelligent heating control card sets the power of a certain heating control point, the power of each channel is automatically detected when the system is started, the power supply voltage and the ambient temperature of the heating point are dynamically detected when the system works normally, the automatic regulation output is realized through the specific calculation of software, the method automatically adapts to the change of the relevant factors influencing the stability of the temperature control of each point, and the set power and the output power are kept consistent. The specific algorithm is as follows:
(1) heating power and supply voltage variation voltage regulation power output
The measured power P of each channel is heated and detected by a heating control card, and is converted into standard power of specific reference voltage (such as 220V, 110V and the like), and the standard power of 220V is used by the system.
The heating power and the supply voltage change voltage regulation power output is a heating power rated value, a power set value 220, and measured voltage V is measured voltage V.
(2) Regulating power quantity by ambient temperature change
The environmental temperature change adjusting power is converted to a specific environmental temperature (such as 25 degrees, 20 degrees and the like) to be used as reference adjustment, and the reference environmental temperature of the system is 25 degrees.
The environmental temperature change adjusting power quantity is (25-environmental temperature T) 1.5; (1.5 is an adjustment coefficient, which can be set by itself).
(3) Adaptive regulation of power output
And (3) self-adaptive adjusting power output, namely environment temperature change adjusting power quantity + heating power and supply voltage change voltage regulation power output.
Example (b):
example (c): the rated heating power is 1000 w, the set power is 400V, the measured voltage V is 222V, the measured power P is 900 w and the ambient temperature T is 15 degrees.
Adaptive adjustment of post-calculation power output
＝1000*400*220*220/(222*222*900)+(25-15)*1.5＝436+15＝451。
Two temperature control modes with self-adaptive adjustment results
1) The set value is 400 with the adaptive adjustment time-share control ratio output 451, and the actual output heating power is 400 watts.
2) The method comprises the steps of firstly converting 451 into 0-10V (corresponding to 0-1000 input linear relation) analog quantity 4.51V input, finding out corresponding power output through a computer table look-up method, and controlling and triggering a thyristor conduction angle to enable the actual output heating power to be 400 watts.
Through the related algorithm, under the condition that the set power is constant, the software automatically adjusts the power output influence caused by the changes of the power of the heating control points, the power supply voltage, the ambient temperature and the like, so that the heating power output of each heating control point is stable, and the temperature is accurately controlled.
The above disclosure is only a few specific embodiments of the present invention, and those skilled in the art can make various modifications and variations of the present invention without departing from the spirit and scope of the present invention, and it is intended that the present invention encompass these modifications and variations as well as others within the scope of the appended claims and their equivalents.
Claims (9)
1. An adaptive control power output intelligent heating control card, characterized by comprising: the photoelectric isolation circuit comprises 16 paths of silicon controlled output ends, a current transformer (1), a voltage transformer (2), a temperature sensor (3) and a microprocessor (4);
the output ends of the photoelectric isolation 16 paths of controllable silicon are respectively connected with 16 heating channels of a heating power grid;
the current transformer (1) is used for detecting the current of each heating channel in a time-sharing manner;
the voltage transformer (2) is used for detecting the voltage of each heating channel in a time-sharing manner;
the temperature sensor (3) is used for detecting the ambient temperature;
the microprocessor (4) is used for obtaining the actual power of each heating channel according to the current and the voltage of each heating channel; the power supply device is used for automatically calculating and outputting according to the actual power of each heating channel, the preset power of each heating channel, the dynamic power supply voltage of each heating channel and the ambient temperature, and outputting self-adaptive adjusting power through the output end of the photoelectric isolation 16-path silicon controlled rectifier;
the 16 way silicon controlled rectifier output terminals of optoelectronic isolation include: a first photo-isolation 8-way thyristor output end (51) and a second photo-isolation 8-way thyristor output end (52); the first photoelectric isolation 8-path silicon controlled output end (51) is a power output end with adaptive adjustment time and duty ratio adjustment, and the second photoelectric isolation 8-path silicon controlled output end (52) is a power output end with adaptive adjustment PWM adjustment;
determining the heating power and the power supply voltage change voltage regulation power output through a formula (1);
determining the adjusting power quantity of the environmental temperature change through a formula (2);
determining an adaptive regulation power output by formula (3);
the formula (1) is as follows:
heating power and supply voltage change voltage regulation power output is a heating power rated value, power set value, standard power and standard power/(measured voltage and measured power);
the formula (2) is as follows:
the environmental temperature change adjusting power quantity is (reference environmental temperature-environmental temperature) adjusting coefficient;
the formula (3) is as follows:
and (3) self-adaptive adjusting power output, namely environment temperature change adjusting power quantity + heating power and supply voltage change voltage regulation power output.
2. An adaptive regulated power output smart heating control card as claimed in claim 1 wherein said microprocessor (4) is further electrically connected to a 485 communication interface (6); and the 485 communication interface (6) is used for connecting another self-adaptive power output adjusting intelligent heating control card.
3. An adaptive regulated power output smart heating control card as claimed in claim 1 wherein said microprocessor (4) is also electrically connected to a data memory (7).
4. An adaptive regulated power output smart heating control card as claimed in claim 1, characterized in that said microprocessor (4) is also electrically connected to a power management module (8).
5. The adaptive regulated power output smart heating control card according to claim 1, characterized in that said microprocessor (4) is further electrically connected with an integrated electricity metering chip (9), and said integrated electricity metering chip (9) is electrically connected with said current transformer (1) and said voltage transformer (2), respectively.
6. An adaptive regulated power output smart heating control card as claimed in claim 1 wherein said microprocessor (4) is further electrically connected to opto-electrically isolated 16-way input (10); and the photoelectric isolation 16 input ends (10) are used for detecting the short circuit and the open circuit of each heating channel in real time.
7. A control method for an intelligent heating control card capable of adaptively adjusting power output is characterized by comprising the following steps:
step 1: acquiring the actual power of each heating channel in a time-sharing manner;
step 2: acquiring the dynamic power supply voltage of each heating channel;
and step 3: acquiring an ambient temperature;
and 4, step 4: determining the heating power and the power supply voltage change voltage regulation power output through a formula (1);
and 5: determining the adjusting power quantity of the environmental temperature change through a formula (2);
step 6: determining an adaptive regulation power output by formula (3);
the formula (1) is as follows:
heating power and supply voltage change voltage regulation power output is a heating power rated value, power set value, standard power and standard power/(measured voltage and measured power);
the formula (2) is as follows:
the environmental temperature change adjusting power quantity is (reference environmental temperature-environmental temperature) adjusting coefficient;
the formula (3) is as follows:
and (3) self-adaptive adjusting power output, namely environment temperature change adjusting power quantity + heating power and supply voltage change voltage regulation power output.
8. The method of adaptively adjusting the control of a power output smart heating control card of claim 7, further comprising: controlling the temperature of the self-adaptive adjusting power output in a mode of controlling the self-adaptive adjusting time to account for the control ratio; wherein, the time accounts for the control ratio output, including: the 1 second time period is divided into 1000 equal parts for time pulse width modulation power output.
9. The method of adaptively adjusting the control of a power output smart heating control card of claim 7, further comprising: controlling the temperature of the self-adaptive adjusting power output in a mode of regulating power output by self-adaptive adjusting PWM; wherein, the PWM power regulation output comprises: and taking the pulse train with each pulse width equal as a PWM waveform to regulate power output.
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Effective date of registration: 20220125 Address after: 230000 room 304, building 1, Kangning Jiayuan, shilimiao, Shushan District, Hefei City, Anhui Province Patentee after: Shi Xiangui Address before: 230000 comprehensive service center of Information Industry Park, 622 Huangshan Road, Hefei, Anhui 303 Patentee before: HEFEI WEIBO AUTOMATION TECHNOLOGY Co.,Ltd. Patentee before: Shi Xiangui |