CN116659241A - Temperature detection and control method and system for particle catcher regenerating furnace - Google Patents
Temperature detection and control method and system for particle catcher regenerating furnace Download PDFInfo
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- CN116659241A CN116659241A CN202310960653.3A CN202310960653A CN116659241A CN 116659241 A CN116659241 A CN 116659241A CN 202310960653 A CN202310960653 A CN 202310960653A CN 116659241 A CN116659241 A CN 116659241A
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- 239000002245 particle Substances 0.000 title claims abstract description 124
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 51
- 230000008929 regeneration Effects 0.000 claims description 33
- 238000011069 regeneration method Methods 0.000 claims description 33
- 230000001276 controlling effect Effects 0.000 claims description 28
- 230000003750 conditioning effect Effects 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000009467 reduction Effects 0.000 claims description 12
- 230000003321 amplification Effects 0.000 claims description 7
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 19
- 229910052799 carbon Inorganic materials 0.000 abstract description 19
- 238000010586 diagram Methods 0.000 description 6
- 230000008021 deposition Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
- B01D46/84—Chemical processes for the removal of the retained particles, e.g. by burning by heating only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention provides a temperature detection and control method and a system for a particle catcher regenerative furnace, wherein the method comprises the following steps: the temperature acquisition module is used for acquiring a current temperature value in the particle catcher regenerative furnace; the key control module is used for acquiring a temperature regulation signal input by a user aiming at a trigger key of the particle catcher regenerative furnace so as to enable the control module to set a theoretical temperature value of the particle catcher regenerative furnace according to the temperature regulation signal; and the control module is used for judging whether to control the heating module to heat the particle catcher regenerative furnace according to the theoretical temperature value and the current temperature value. According to the method, the actual temperature in the regenerating furnace is acquired and detected in real time, and whether the regenerating furnace needs to be heated is judged according to whether the actual temperature is equal to the set furnace temperature, so that carbon deposit in the regenerating furnace can be fully removed when the set temperature is reached.
Description
Technical Field
The invention relates to the technical field of regeneration furnaces of diesel particulate traps, in particular to a temperature detection and control method and a temperature detection and control system of a regeneration furnace of a particulate trap.
Background
At present, the main stream host factory achieves the purpose of filtering carbon deposition by adding a particle catcher in an exhaust system, when the carbon deposition collected in the particle catcher reaches a certain degree, the carbon deposition can be identified by a vehicle, and at the moment, if the speed of the vehicle meets the requirement, the engine can improve the fuel injection quantity of the engine, improve the exhaust temperature and burn the carbon deposition in the particle catcher under the control of software so as to achieve the purpose of emptying the particle catcher.
However, in the actual use process, many light diesel vehicles are used on a construction site, the speed is low, carbon deposition in a vehicle particle catcher can not be removed in time due to the fact that the exhaust temperature can not be improved, so that the exhaust back pressure is insufficient, even the vehicle particle catcher is completely blocked and can not be started, and aiming at the situation, the particle catcher is mainly replaced by the existing after-sale treatment means, however, the particle catcher has high cost and huge waste of resources can be caused.
Disclosure of Invention
Based on the above, the invention aims to provide a temperature detection and control method and a temperature detection and control system for a regeneration furnace of a particle catcher, which aim to solve the problem of resource waste caused by high cost due to replacement of the particle catcher of a diesel engine in the prior art, so as to fully remove carbon deposit in the catcher of the regeneration furnace on the premise of not updating the particle catcher of the diesel engine.
According to the temperature detection and control method of the particle catcher regenerative furnace, which is provided by the invention, the temperature detection and control system of the particle catcher regenerative furnace is realized, the temperature detection and control system of the particle catcher regenerative furnace comprises a temperature acquisition module, a control module electrically connected with the temperature acquisition module, and a key control module and a heating module respectively electrically connected with the control module, and the method comprises the following steps:
the key control module acquires a temperature regulation signal input by a user aiming at a trigger key of the particle catcher regenerative furnace according to the temperature rise regulation circuit, the temperature reduction regulation circuit and the temperature determination circuit, the control module enters a temperature control program according to the temperature regulation signal, and a theoretical temperature value of the particle catcher regenerative furnace is set according to the temperature control program:
judging whether the temperature rise regulating circuit is at a low level, and entering a temperature rise control program if the temperature rise regulating circuit is at the low level;
if the temperature rise regulating circuit is not at the low level, judging whether the temperature fall regulating circuit is at the low level or not;
if the temperature reduction regulating circuit is at a low level, entering a temperature reduction control program;
if the temperature reduction regulating circuit is not at a low level, entering a temperature determining circuit control program;
the temperature acquisition module is used for acquiring a current temperature value in the particle catcher regenerative furnace;
and the control module is used for judging whether to control the heating module to heat the particle catcher regenerative furnace according to the theoretical temperature value and the current temperature value.
Compared with the prior art, the temperature detection and control method for the particle catcher regenerative furnace has the advantages that the key control module is arranged to trigger the key to input a temperature regulation signal, so that the setting of a theoretical temperature value required by removing carbon deposit in the regenerative furnace is realized, and the current actual temperature in the regenerative furnace is obtained through the temperature acquisition module; and then judging whether the obtained theoretical temperature value is equal to the current temperature value or not through the control module to control whether the heating module needs heating treatment or not: when the obtained current temperature value is smaller than the set theoretical temperature value, the control module controls the heating module to start heating, so that the regenerating furnace is heated, the temperature acquisition module is started again to obtain the latest actual temperature, the current actual temperature in the regenerating furnace is equal to the set theoretical temperature value, the regenerating furnace is kept to be stably within the set temperature range, carbon deposit in the particle catcher regenerating furnace can be fully burnt out under the condition that the set theoretical temperature is reached, and the effectiveness of online cleaning work of the carbon deposit in the furnace is greatly improved.
Further, the temperature acquisition module includes a temperature sensor, a signal amplifier electrically connected with the temperature sensor, a signal conditioner electrically connected with the signal amplifier, and an a/D converter electrically connected with the signal conditioner, the temperature acquisition module is used for obtaining a current temperature value in the particle catcher regenerative furnace, and includes:
when a temperature detection and control system of the particle catcher regenerating furnace is started, the temperature sensor is used for collecting the temperature in the particle catcher regenerating furnace and converting the temperature into a voltage signal;
the signal amplifier is used for amplifying the voltage signal in the particle catcher regenerative furnace to obtain a voltage amplified signal;
the signal conditioner is used for conditioning the voltage amplification signal to an electric analog signal acceptable by the A/D converter according to a preset signal conditioning rule;
the A/D converter is used for converting the electric analog signal into a temperature digital signal.
Further, the signal conditioner is configured to condition the voltage amplified signal to an electrical analog signal acceptable to the a/D converter according to a preset signal conditioning rule, and includes:
the signal conditioner conditions the voltage amplified signal according to the following formula:
wherein:representing the voltage amplified signal in the input signal conditioning circuit, < >>And R1, R2, R3 and R4 represent the electric analog signals output by the signal conditioning circuit and all represent the resistance of the signal conditioner circuit.
Further, the a/D converter is configured to convert the electrical analog signal into a temperature digital signal, and includes:
the DOUT port, the SCLK port and the CS port of the A/D converter circuit are respectively and electrically connected with the P1.0 port, the P1.1 port and the P1.2 port of the control module circuit, and when the SCLK port and the CS port respectively receive the low level input by the control module in sequence, the A/D converter starts to perform signal conversion on the electric analog signal;
when the signal conversion is finished, the A/D converter inputs high level to the P1.0 port of the control module through the DOUT port, and at the moment, the control module inputs high and low pulses to the SCLK port of the A/D converter circuit through the P1.1 port so as to read the temperature digital signal.
Further, the step that the control module is used for judging whether to control the heating module to heat the particle catcher regenerative furnace according to the theoretical temperature value and the current temperature value includes:
the control module is used for judging whether the theoretical temperature value is equal to the current temperature value or not;
if the control module judges that the current temperature value is smaller than the theoretical temperature value, acquiring a temperature difference value between the theoretical temperature value and the current temperature value, and sending the temperature difference value to the heating module;
the heating module is used for heating the particle catcher regenerating furnace according to the temperature difference value;
the temperature acquisition module is further used for acquiring the temperature value of the particle catcher regeneration furnace after temperature rising again, so that the control module judges whether to control the heating module to heat the particle catcher regeneration furnace again according to the temperature value of the particle catcher regeneration furnace after temperature rising and the theoretical temperature value until the temperature value of the particle catcher regeneration furnace at the latest moment is equal to the theoretical temperature value.
Further, before the step of determining whether to control the heating module to raise the temperature of the particle catcher regenerative furnace according to the theoretical temperature value and the current temperature value, the control module includes:
the control module is further electrically connected with a temperature display, and the temperature display displays the current temperature value and the set theoretical temperature value obtained by the control module in real time.
Further, the control module is further electrically connected to a temperature display, and the step of displaying the current temperature value and the set theoretical temperature value obtained by the control module in real time by the temperature display includes:
the temperature display displays the current temperature value and the set theoretical temperature value obtained from the control module through an LED display screen, and the LED display screen controls whether each diode emits light or not by controlling the level of each diode pin of the LED, so that different fonts are displayed.
According to the embodiment of the invention, a temperature detection and control system of a particle catcher regenerative furnace comprises:
the temperature acquisition module is used for acquiring a current temperature value and a temperature value after temperature rise in the particle catcher regenerative furnace, so that the control module judges whether to control the heating module to heat the particle catcher regenerative furnace again according to the temperature value and the theoretical temperature value after temperature rise of the particle catcher regenerative furnace until the temperature value of the particle catcher regenerative furnace at the latest moment is equal to the theoretical temperature value, and the temperature acquisition module comprises a temperature sensor, a signal amplifier, a signal conditioner and an A/D converter, wherein:
the temperature sensor is used for collecting temperature signals detected in the particle catcher regenerating furnace and converting the temperature signals into voltage signals;
the signal amplifier is used for amplifying the voltage signal in the particle catcher regeneration furnace to obtain a voltage amplified signal;
the signal conditioner is used for conditioning the voltage amplification signal to an electric analog signal which can be accepted by the A/D converter according to a preset signal conditioning rule;
an a/D converter for converting the electrical analog signal into a temperature digital signal;
the key control module is used for acquiring a temperature regulation signal input by a user aiming at a trigger key of the particle catcher regenerative furnace so as to enable the control module to set a theoretical temperature value of the particle catcher regenerative furnace according to the temperature regulation signal;
and the heating module is used for heating the particle catcher regenerating furnace according to the temperature difference value.
In another aspect, the present invention further provides a readable storage medium, where the readable storage medium stores one or more programs that when executed by a processor implement a method for detecting and controlling a temperature of a particulate trap regenerator as described above.
In another aspect, the present invention provides a regenerator, wherein the regenerator comprises a memory and a processor, wherein: the memory is used for storing a computer program; the processor is used for realizing the temperature detection and control method of the particle catcher regenerating furnace when executing the computer program stored in the memory.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a flow chart of a temperature detection and control method for a particle catcher regenerative furnace according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a method for detecting and controlling the temperature of a regeneration furnace of a particle catcher according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram showing a keyboard circuit in a temperature detecting and controlling method for a particle catcher regenerative furnace according to a second embodiment of the present invention;
FIG. 4 is a key control flow chart in a temperature detecting and controlling method for a regeneration furnace of a particle catcher according to a second embodiment of the present invention;
FIG. 5 is a schematic diagram showing a primary signal conditioning circuit in a temperature detecting and controlling method for a particle catcher regenerator according to a second embodiment of the present invention;
FIG. 6 is a schematic diagram showing a secondary signal conditioning circuit in a temperature detecting and controlling method for a particle catcher regenerator according to a second embodiment of the present invention;
FIG. 7 is a schematic diagram of an A/D conversion circuit in a temperature detecting and controlling method for a regeneration furnace of a particle catcher according to a second embodiment of the present invention;
FIG. 8 is a flow chart of A/D conversion in a method for detecting and controlling the temperature of a regeneration furnace of a particle catcher according to a second embodiment of the present invention;
FIG. 9 is a general circuit diagram of a temperature sensing and control system for a particle catcher regenerator according to a second embodiment of the present invention;
FIG. 10 is a flow chart illustrating a temperature detecting and controlling system of a regeneration furnace for a particle catcher according to a third embodiment of the present invention;
fig. 11 is a flowchart of a main program of a temperature detecting and controlling system of a regeneration furnace of a particle catcher according to a third embodiment of the present invention.
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a flowchart of a temperature detecting and controlling method for a particle catcher regenerative furnace according to a first embodiment of the present invention is shown, the method includes steps S01 to S03, wherein:
step S01: the key control module acquires a temperature regulation signal input by a user aiming at a trigger key of the particle catcher regenerative furnace according to the temperature rise regulation circuit, the temperature reduction regulation circuit and the temperature determination circuit, the control module enters a temperature control program according to the temperature regulation signal, and a theoretical temperature value of the particle catcher regenerative furnace is set according to the temperature control program:
judging whether the temperature rise regulating circuit is at a low level, and entering a temperature rise control program if the temperature rise regulating circuit is at the low level;
if the temperature rise regulating circuit is not at the low level, judging whether the temperature fall regulating circuit is at the low level or not;
if the temperature reduction regulating circuit is at a low level, entering a temperature reduction control program;
if the temperature reduction regulating circuit is not at a low level, entering a temperature determining circuit control program;
it can be understood that the function of the key is mainly to set the furnace temperature, if a plurality of digital keys are used for inputting the furnace temperature data, more than ten keys are needed, so that in order to save key resources, the default furnace temperature after the system is powered on is set to 600 ℃, the method of increasing or decreasing the default initial furnace temperature is adopted to adjust the set temperature in the furnace, and after the set temperature in the furnace is adjusted to a required theoretical temperature value, the furnace temperature setting can be realized by pressing the 'determination' key.
Step S02: the temperature acquisition module acquires a current temperature value in the particle catcher regenerative furnace;
it can be understood that the actual temperature in the furnace changes in real time in the heating process, so that a temperature measuring probe with quick response, high temperature resistance and high measurement precision is required to be used as a temperature measuring sensor, a temperature signal is converted into an electric signal, and the electric signal is converted into a temperature digital signal, thereby being beneficial to acquiring the current actual temperature in the regenerating furnace and providing clearer guidance for the next operation.
Step S03: and the control module judges whether to control the heating module according to the theoretical temperature value and the current temperature value, and heats the particle catcher regenerative furnace.
It can be understood that the control of the temperature of the regenerating oven is realized by controlling the on or off of the heating circuit; when in actual work, the singlechip reads the current temperature in real time through the furnace temperature detection circuit and compares the current temperature with the theoretical temperature, and if the current temperature is smaller than the theoretical temperature, the controlled heating circuit is conducted; if the current temperature is equal to the theoretical temperature, the controlled heating circuit is immediately disconnected; thereby enabling the temperature inside the furnace to remain relatively stable;
it should be noted that the single-chip microcomputer belongs to one control device in the control module, and the control module may be other control devices besides the single-chip microcomputer.
In summary, according to the above method for detecting and controlling the temperature of the regenerating furnace of the particle catcher, by setting the key control module to trigger the key to input the temperature adjusting signal, the setting of the theoretical temperature value required by removing the carbon deposit in the regenerating furnace is realized, and the current actual temperature in the regenerating furnace is obtained by the temperature collecting module; and then judging whether the obtained theoretical temperature value is equal to the current temperature value or not through the control module to control whether the heating module needs heating treatment or not: when the obtained current temperature value is smaller than the set theoretical temperature value, the control module controls the heating module to start heating, so that the regenerating furnace is heated, the temperature acquisition module is started again to obtain the latest actual temperature, the current actual temperature in the regenerating furnace is equal to the set theoretical temperature value, the regenerating furnace is kept to be stably within the set temperature range, carbon deposit in the particle catcher regenerating furnace can be fully burnt out under the condition that the set theoretical temperature is reached, and the effectiveness of online cleaning work of the carbon deposit in the furnace is greatly improved.
Referring to fig. 2, a flowchart of a temperature detecting and controlling method of a particle catcher regenerative furnace according to a second embodiment of the present invention is shown, the method includes steps S101 to S107, wherein:
step S101: starting a furnace temperature setting program, and inputting the theoretical temperature value through the furnace temperature increasing setting button, the furnace temperature decreasing setting button and the furnace temperature determining button which are arranged on the button control module, wherein the button detection circuit is shown in fig. 3, and the button detection flow is shown in fig. 4;
it can be understood that the key detection program adopts a column-by-column scanning method to detect whether a key is pressed, the singlechip outputs low level 0 at ports P3.2, P3.1 and P3.0 respectively, other interfaces output high level 1 (for example, when the port P3.2 outputs low level 0, P3.0-P3.1 outputs high level 1, when the port P3.1 outputs low level 0, P3.0 and P3.2 outputs high level 1, and when the port P3.0 outputs low level 0, P3.1-P3.2 outputs high level 1), then the value on the interface P3.4 is read, the pressed position is the junction of the line displaying low level and the line with low level, and the pressed key is found and then enters the processing program of the corresponding key, so that the input of the set theoretical temperature is realized.
Step S102: the K-type thermocouple is selected as a temperature sensor, and the temperature in the regeneration furnace of the particle catcher is collected in real time and converted into a voltage signal;
it can be understood that because the temperature of the regenerating furnace is relatively high, 600-700 ℃ is generally needed, the measuring precision is high, the response time is quick, the linearization degree is high, the K-type thermocouple with high temperature resistance is used as a temperature measuring probe, and the thermoelectric voltage range generated by the K-type thermocouple is 0-29.128 mV when the temperature range of the graduation table of the K-type thermocouple is 0-700 ℃; because the detection temperature range is 0-700 ℃, the 12-bit serial A/D converter MAX1241 is selected to convert the analog voltage signal into the digital signal which can be processed by the singlechip, and the input range of the analog voltage which can be accepted by the MAX1241 is 0-2.5V and is inconsistent with the output voltage range of the K-type thermocouple, an amplifying circuit is required to be designed to amplify the weak voltage signal of the K-type thermocouple to the range of 0-2.5V which can be accepted by the A/D conversion chip.
Step S103: an AD595 thermocouple amplifier is selected as an amplifying device, the voltage signal in the particle catcher regenerative furnace is subjected to primary amplification to obtain a voltage amplified signal, and the circuit of the signal amplifier is shown in figure 5;
it can be understood that the AD595 thermocouple amplifier is used as the primary signal amplifying device, and the output voltage thereof satisfies the following relationship:
AD595 output voltage= (K-type thermoelectric +11uv) × 247.3
The voltage signal of the K-type thermocouple is input from pins 1 and 14 and then comes out from pin 9, the thermoelectric voltage generated by the thermocouple is in the range of 0-29.128 mV in the temperature change range (0-700 ℃), the voltage Vout1 range of the thermocouple after primary signal amplification is 0.0027-7.2061V according to the AD595 input/output voltage formula, and the voltage range is not overlapped with the voltage range 0-2.5V acceptable by the A/D converter MAX1241, so a secondary amplifying circuit is required to be designed, and the voltage of Vout1 is continuously regulated.
Step S104: a signal conditioner is formed by two OP07 chips, the voltage amplification signal is conditioned to an electric analog signal which can be accepted by an A/D converter MAX1241 according to a preset signal conditioning rule, and a circuit of the signal conditioner is shown in figure 6;
it can be understood that the secondary signal conditioning circuit is composed of an operational amplifier OP07 and an auxiliary circuit, the secondary signal conditioning circuit is composed of two OP07 chips powered by + -15V dual power supplies, the positive input ends of the OP07 chips are grounded, the resistors R1 and R2 are connected with the negative input ends of the OP07 chips, the output ends corresponding to the pins 6 output voltages amplified by the OP07 chips, and the characteristics of the OP07 chips such as "virtual short and virtual break" are known:
therefore, the relationship between the input and output voltages of the secondary signal conditioning circuit consisting of two OPs 07 is:
the output voltage Vout1 of the primary signal amplifying circuit ranges from 0.0027 to 7.2061V, and the output voltage of the primary signal amplifying circuit is the input voltage of the secondary signal conditioning circuit; according to the formula of the relation between the input voltage and the output voltage of the secondary signal conditioning circuit, the output voltage of the secondary signal conditioning circuit ranges from 0.0009V to 2.4501V, and the voltage range acceptable by the A/D converter MAX1241 is met.
Step S105: the MAX1241 chip is selected as an A/D converter, the electric signal analog signal is converted into a temperature digital signal which can be accepted by the singlechip, the circuit of the signal converter is shown in figure 7, and the flow of the signal converter is shown in figure 8;
it can be understood that the chip MAX1241 adopts a +5V single power supply mode, the SHDN port is connected with high level, and the A/D conversion chip is forbidden to be in a dormant state; DOUT, SCLK, CS are respectively connected with P1.0, P1.1 and P1.2 ports of the singlechip; when A/D conversion is required to be started, a P1.1 port of the singlechip firstly inputs a low level to an SCLK port of MAX1241, a P1.2 pin of the singlechip inputs a low level to a CS port of MAX1241, the chip starts to perform A/D conversion, and meanwhile, the sample hold circuit enters a sample hold state; after the A/D conversion is finished, the DOUT port of the chip MAX1241 inputs a high level to the P1.0 port of the singlechip to inform the singlechip that the A/D conversion is finished, at the moment, the P1.1 port of the singlechip inputs high and low pulses to the SCLK port of the MAX1241, data is input into the singlechip through the DOUT port at the falling edge of the SCLK pulse, and 12-bit digital data is sequentially output according to the high order and the low order.
Step S106: the control module judges whether the obtained theoretical temperature value is equal to the detected actual temperature value;
it can be understood that when the equipment is powered on, the temperature setting is started through the key, the temperature detection circuit continuously inputs real-time furnace temperature data to the singlechip, the singlechip continuously compares the measured furnace temperature with the set furnace temperature, and controls the on and off of the heating circuit through the PID algorithm, so that the accurate control of the furnace temperature is achieved.
Step S107: if the control module judges that the current temperature value is greater than or equal to the theoretical temperature value, the heating circuit is disconnected, and the particle catcher regenerative furnace stops heating;
step S108: and if the control module judges that the current temperature value is smaller than the theoretical temperature value, the heating circuit is conducted, and the particle catcher regenerative furnace is heated until the actual temperature value of the particle catcher regenerative furnace at the latest moment is equal to the theoretical temperature value.
It should be noted that the single-chip microcomputer belongs to one control device in the control module, and the control module may be other control devices besides the single-chip microcomputer.
In summary, according to the above method for detecting and controlling the temperature of the regenerating furnace of the particle catcher, by setting the key control module to trigger the key to input the temperature adjusting signal, the setting of the theoretical temperature value required by removing the carbon deposit in the regenerating furnace is realized, and the current actual temperature in the regenerating furnace is obtained by the temperature collecting module; and then judging whether the obtained theoretical temperature value is equal to the current temperature value or not through the control module to control whether the heating module needs heating treatment or not: when the obtained current temperature value is smaller than the set theoretical temperature value, the control module controls the heating module to start heating, so that the regenerating furnace is heated, the temperature acquisition module is started again to obtain the latest actual temperature, the current actual temperature in the regenerating furnace is equal to the set theoretical temperature value, the regenerating furnace is kept to be stably within the set temperature range, carbon deposit in the particle catcher regenerating furnace can be fully burnt out under the condition that the set theoretical temperature is reached, and the effectiveness of online cleaning work of the carbon deposit in the furnace is greatly improved.
Referring to fig. 9, a general circuit diagram of a temperature detecting and controlling system of a particle catcher regenerative furnace according to a third embodiment of the present invention is shown;
referring to fig. 10, a structural flow chart of a temperature detecting and controlling system of a regeneration furnace of a particle catcher in a third embodiment of the present invention is shown, the system includes:
a control module 10 for installing a controller for performing editing logic operation and data processing in the regenerator to control the electric heating temperature;
it should be noted that, fig. 11 is a flow chart of a main program of the system, where the main program is a backbone of the system and is located at the top layer of the program, and it mainly performs operation management on the single chip microcomputer system and coordinates the calling relationship of each functional module.
The key control module 20 is configured to obtain a temperature adjustment signal input by a user for the trigger key of the particle trap regeneration furnace, so that the control module sets a theoretical temperature value of the particle trap regeneration furnace according to the temperature adjustment signal.
The temperature acquisition module 30 is configured to acquire a current temperature value and a temperature value after temperature rising in the particle catcher regenerative furnace, so that the control module determines whether to control the heating module to raise the temperature of the particle catcher regenerative furnace again according to the temperature value and the theoretical temperature value after temperature rising of the particle catcher regenerative furnace until the temperature value of the particle catcher regenerative furnace at the latest moment is equal to the theoretical temperature value, and the temperature acquisition module includes a temperature sensor, a signal amplifier, a signal conditioner and an a/D converter, where:
the temperature sensor 301 is used for collecting temperature signals detected in the particle catcher regenerative furnace and converting the temperature signals into voltage signals;
the signal amplifier 302 is configured to amplify a voltage signal in the particle catcher regenerative furnace to obtain a voltage amplified signal;
the signal conditioner 303 is configured to condition the voltage amplified signal to an electrical analog signal acceptable by the a/D converter according to a preset signal conditioning rule;
an a/D converter 304 for converting the electrical analog signal into a temperature digital signal.
And the temperature display module 40 is used for displaying the set theoretical temperature value and the detected current temperature value in real time.
And the heating module 50 is used for heating the particle catcher regenerative furnace according to the temperature difference.
In summary, according to the above method for detecting and controlling the temperature of the regenerating furnace of the particle catcher, by setting the key control module to trigger the key to input the temperature adjusting signal, the setting of the theoretical temperature value required by removing the carbon deposit in the regenerating furnace is realized, and the current actual temperature in the regenerating furnace is obtained by the temperature collecting module; and then judging whether the obtained theoretical temperature value is equal to the current temperature value or not through the control module to control whether the heating module needs heating treatment or not: when the obtained current temperature value is smaller than the set theoretical temperature value, the control module controls the heating module to start heating, so that the regenerating furnace is heated, the temperature acquisition module is started again to obtain the latest actual temperature, the current actual temperature in the regenerating furnace is equal to the set theoretical temperature value, the regenerating furnace is kept to be stably within the set temperature range, carbon deposit in the particle catcher regenerating furnace can be fully burnt out under the condition that the set theoretical temperature is reached, and the effectiveness of online cleaning work of the carbon deposit in the furnace is greatly improved.
In another aspect, the present invention further provides a readable storage medium, where one or more programs are stored, and when the programs are executed by a processor, the method for detecting and controlling the temperature in the furnace is implemented.
In another aspect, the invention also provides a regenerator comprising a memory and a processor, wherein: the memory is used for storing a computer program; the processor is used for realizing the method for detecting and controlling the temperature in the furnace when executing the computer program stored in the memory.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (10)
1. The temperature detection and control method of the particle catcher regenerative furnace is characterized by being realized by a temperature detection and control system of the particle catcher regenerative furnace, wherein the temperature detection and control system of the particle catcher regenerative furnace comprises a temperature acquisition module, a control module electrically connected with the temperature acquisition module, and a key control module and a heating module respectively electrically connected with the control module, and the method comprises the following steps:
the key control module acquires a temperature regulation signal input by a user aiming at a trigger key of the particle catcher regenerative furnace according to the temperature rise regulation circuit, the temperature reduction regulation circuit and the temperature determination circuit, the control module enters a temperature control program according to the temperature regulation signal, and a theoretical temperature value of the particle catcher regenerative furnace is set according to the temperature control program:
judging whether the temperature rise regulating circuit is at a low level, and entering a temperature rise control program if the temperature rise regulating circuit is at the low level;
if the temperature rise regulating circuit is not at the low level, judging whether the temperature fall regulating circuit is at the low level or not;
if the temperature reduction regulating circuit is at a low level, entering a temperature reduction control program;
if the temperature reduction regulating circuit is not at a low level, entering a temperature determining circuit control program;
the temperature acquisition module is used for acquiring a current temperature value in the particle catcher regenerative furnace;
and the control module is used for judging whether to control the heating module to heat the particle catcher regenerative furnace according to the theoretical temperature value and the current temperature value.
2. The method for detecting and controlling the temperature of a regeneration furnace of a particle trap according to claim 1, wherein the temperature acquisition module comprises a temperature sensor, a signal amplifier electrically connected with the temperature sensor, a signal conditioner electrically connected with the signal amplifier, and an a/D converter electrically connected with the signal conditioner, and the temperature acquisition module is used for acquiring a current temperature value in the regeneration furnace of the particle trap, and comprises:
when a temperature detection and control system of the particle catcher regenerating furnace is started, the temperature sensor is used for collecting the temperature in the particle catcher regenerating furnace and converting the temperature into a voltage signal;
the signal amplifier is used for amplifying the voltage signal in the particle catcher regenerative furnace to obtain a voltage amplified signal;
the signal conditioner is used for conditioning the voltage amplification signal to an electric analog signal acceptable by the A/D converter according to a preset signal conditioning rule;
the A/D converter is used for converting the electric analog signal into a temperature digital signal.
3. The method for detecting and controlling the temperature of a regeneration furnace of a particle catcher according to claim 2, wherein the signal conditioner is configured to condition the voltage amplified signal to an electrical analog signal acceptable to the a/D converter according to a preset signal conditioning rule, and comprises:
the signal conditioner conditions the voltage amplified signal according to the following formula:
wherein:representing the voltage amplified signal in the input signal conditioning circuit, < >>And R1, R2, R3 and R4 represent the electric analog signals output by the signal conditioning circuit and all represent the resistance of the signal conditioner circuit.
4. The method for detecting and controlling the temperature of a particle catcher regenerative furnace according to claim 2, wherein the a/D converter is configured to convert the electrical analog signal into a temperature digital signal, and comprises:
the DOUT port, the SCLK port and the CS port of the A/D converter circuit are respectively and electrically connected with the P1.0 port, the P1.1 port and the P1.2 port of the control module circuit, and when the SCLK port and the CS port respectively receive the low level input by the control module in sequence, the A/D converter starts to perform signal conversion on the electric analog signal;
when the signal conversion is finished, the A/D converter inputs high level to the P1.0 port of the control module through the DOUT port, and at the moment, the control module inputs high and low pulses to the SCLK port of the A/D converter circuit through the P1.1 port so as to read the temperature digital signal.
5. The method for detecting and controlling the temperature of a regeneration furnace for a particle catcher according to claim 1, wherein the step of the control module for judging whether to control the heating module to raise the temperature of the regeneration furnace for a particle catcher according to the theoretical temperature value and the current temperature value comprises the steps of:
the control module is used for judging whether the theoretical temperature value is equal to the current temperature value or not;
if the control module judges that the current temperature value is smaller than the theoretical temperature value, acquiring a temperature difference value between the theoretical temperature value and the current temperature value, and sending the temperature difference value to the heating module;
the heating module is used for heating the particle catcher regenerating furnace according to the temperature difference value;
the temperature acquisition module is further used for acquiring the temperature value of the particle catcher regeneration furnace after temperature rising again, so that the control module judges whether to control the heating module to heat the particle catcher regeneration furnace again according to the temperature value of the particle catcher regeneration furnace after temperature rising and the theoretical temperature value until the temperature value of the particle catcher regeneration furnace at the latest moment is equal to the theoretical temperature value.
6. The method for detecting and controlling the temperature of a regeneration furnace for a particle catcher according to claim 1, wherein the step of determining whether to control the heating module to raise the temperature of the regeneration furnace for a particle catcher according to the theoretical temperature value and the current temperature value comprises the following steps:
the control module is further electrically connected with a temperature display, and the temperature display displays the current temperature value and the set theoretical temperature value obtained by the control module in real time.
7. The method for detecting and controlling the temperature of a regeneration furnace for a particle catcher according to claim 6, wherein the control module is further electrically connected to a temperature display, and the step of displaying the current temperature value and the set theoretical temperature value obtained by the control module in real time by the temperature display comprises:
the temperature display displays the current temperature value and the set theoretical temperature value obtained from the control module through an LED display screen, and the LED display screen controls whether each diode emits light or not by controlling the level of each diode pin of the LED, so that different fonts are displayed.
8. A temperature detection and control system for a particle catcher regenerative furnace, the system comprising:
the temperature acquisition module is used for acquiring a current temperature value and a temperature value after temperature rise in the particle catcher regenerative furnace, so that the control module judges whether to control the heating module to heat the particle catcher regenerative furnace again according to the temperature value and the theoretical temperature value after temperature rise of the particle catcher regenerative furnace until the temperature value of the particle catcher regenerative furnace at the latest moment is equal to the theoretical temperature value, and the temperature acquisition module comprises a temperature sensor, a signal amplifier, a signal conditioner and an A/D converter, wherein:
the temperature sensor is used for collecting temperature signals detected in the particle catcher regenerating furnace and converting the temperature signals into voltage signals;
the signal amplifier is used for amplifying the voltage signal in the particle catcher regeneration furnace to obtain a voltage amplified signal;
the signal conditioner is used for conditioning the voltage amplification signal to an electric analog signal which can be accepted by the A/D converter according to a preset signal conditioning rule;
an a/D converter for converting the electrical analog signal into a temperature digital signal;
the key control module is used for acquiring a temperature regulation signal input by a user aiming at a trigger key of the particle catcher regenerative furnace so as to enable the control module to set a theoretical temperature value of the particle catcher regenerative furnace according to the temperature regulation signal;
and the heating module is used for heating the particle catcher regenerating furnace according to the temperature difference value.
9. A computer readable storage medium storing one or more programs which when executed by a processor implement the method of temperature detection and control of a particle trap regeneration furnace of any one of claims 1-7.
10. A regenerator, the regenerator comprising a memory and a processor, wherein:
the memory is used for storing a computer program;
the processor is used for realizing the temperature detection and control method of the particle catcher regenerating furnace according to any one of claims 1-7 when executing the computer program stored on the memory.
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