CN110646112A - Ultrasonic industrial furnace temperature measurement system and method based on multiple sound source arrangement modes - Google Patents

Ultrasonic industrial furnace temperature measurement system and method based on multiple sound source arrangement modes Download PDF

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CN110646112A
CN110646112A CN201910930268.8A CN201910930268A CN110646112A CN 110646112 A CN110646112 A CN 110646112A CN 201910930268 A CN201910930268 A CN 201910930268A CN 110646112 A CN110646112 A CN 110646112A
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ultrasonic
temperature
industrial furnace
microprocessor
temperature measurement
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胡贤忠
谢清华
张娟
梁容真
阎富生
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Northeastern University China
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Northeastern University China
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/22—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Abstract

The invention provides a system and a method for measuring temperature of an ultrasonic industrial furnace based on a plurality of sound source arrangement modes, and relates to the technical field of acoustic temperature measurement. The system comprises an ultrasonic transmitter, an ultrasonic receiver, an ultrasonic transmitting/receiving module, an ash blowing cooler, a high-temperature alarm protector, an STM32 microprocessor, an LCD display and a PC; the method is characterized in that 8 pairs of ultrasonic wave transmitting/receiving devices are arranged on the periphery of one section of a furnace wall, the same amount of ultrasonic wave transmitting/receiving devices are arranged on different sections in the same mode, each acoustic wave transmitting/receiving device is sequentially started and stopped in a detection period according to a set program, a group of acoustic wave propagation time values are obtained, and temperature distribution on the section of a temperature field is reconstructed through a once reconstruction algorithm. The ultrasonic wave is used as a signal source, so that background noise interference of the hearth of the industrial furnace is reduced, the faster response time advantage of the ultrasonic wave is utilized, the flight time of the sound wave temperature measurement signal is accurately measured, and an accurate temperature field in the industrial furnace is obtained.

Description

Ultrasonic industrial furnace temperature measurement system and method based on multiple sound source arrangement modes
Technical Field
The invention relates to the technical field of acoustic temperature measurement, in particular to a temperature measurement system and method for an ultrasonic industrial furnace based on a plurality of sound source arrangement modes.
Background
Complex temperature fields exist in the industry in a variety of devices for combustion or heating. In industrial furnaces of the metallurgical and other industries, the industrial furnace hearth is a complex reaction site in which complex chemical reactions and physical changes are carried out, accompanied by transient changes in temperature. The temperature is one of the most important parameters of thermal equipment and a thermal system, the distribution of the temperature field can be used for measuring the stability and the economical efficiency of combustion, and the change of the temperature field directly influences the combustion and the burnout of fuel and the safe and stable operation of an industrial furnace. The temperature field with reasonable organization is beneficial to the combustion and the burnout of fuel, the heat economy and the heat stability of the industrial furnace are ensured, the utilization rate of energy is improved, and the formation of sulfide and nitrogen oxide is reduced, thereby reducing the emission of pollutants.
For furnace and kiln equipment, it is very important to accurately measure the distribution of the temperature field in the furnace to improve the economy and safety of large industrial furnace equipment. Along with the increase of the national attention on energy consumption and environmental protection problems, how to improve the economical efficiency and safety of the operation of industrial furnace equipment and reduce NOxAnd the problem of pollutant emission needs to be solved. These problems are closely related to the combustion conditions, so that real-time and accurate measurement of the combustion temperature becomes a key point for solving the problems. The combustion process of industrial furnace equipment has the characteristics of random turbulence, high-temperature corrosion, temperature transient change, background noise in the furnace and the like, so that certain difficulty is brought to accurate real-time measurement of temperature field parameters. However, most of the conventional furnace temperature measuring methods are contact-type measuring methods, which put higher requirements on materials of measuring instruments, and the conventional contact-type measuring methods have certain problems in reliability and accuracy, so that certain errors exist in the obtained combustion parameters, and accurate control of a temperature field is hindered. Therefore, finding a simple and accurate measurement method becomes the key to solve the problem.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an ultrasonic industrial furnace temperature measuring system and method based on a plurality of sound source arrangement modes aiming at the defects of the prior art, and the temperature of the industrial furnace is measured by ultrasonic waves.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: on one hand, the invention provides an ultrasonic industrial furnace temperature measurement system based on a plurality of sound source arrangement modes, which comprises a plurality of ultrasonic transmitters, a plurality of ultrasonic receivers, an ultrasonic transmitting/receiving module, an ash blowing cooler, a high-temperature alarm protector, a microprocessor, an LCD display and a PC; the ultrasonic transmitter and the ultrasonic receiver are respectively connected with the ultrasonic transmitting module and the ultrasonic receiving module, and the ultrasonic transmitting/receiving module, the ash blowing cooler, the high-temperature alarm protector, the LCD display and the PC are respectively connected with the microprocessor;
the ultrasonic transmitter is used for transmitting an amplified ultrasonic temperature measurement signal;
the ultrasonic receiver is used for receiving an ultrasonic temperature measurement signal returned by the industrial furnace;
the ultrasonic transmitting/receiving module is used for amplifying and filtering signals; the ultrasonic transmitting/receiving module comprises an amplifying circuit and a filtering circuit; the ash blowing cooler is used for cleaning sound wave guide pipes in the ultrasonic transmitter and the ultrasonic receiver;
the high-temperature alarm protector is used for giving an alarm when the temperatures of the ultrasonic transmitter and the ultrasonic receiver reach the set protection temperature;
the microprocessor is used for controlling the ultrasonic transmitter, the ultrasonic receiver, the ash blowing cooler and the high-temperature alarm protector;
the LCD is used for displaying real-time ultrasonic signal waveform and temperature measurement results;
the PC is used for calculating the flight time of the ultrasonic waves by using a correlation analysis algorithm, calculating an average temperature value on an ultrasonic wave path according to a certain algorithm, and simultaneously setting and calibrating the whole system;
the setting and calibration comprises setting of a calculation algorithm built in the PC and calibration of circuit connection of the microprocessor and other modules;
preferably, the plurality of ultrasonic transmitters and the plurality of ultrasonic receivers are arranged in pairs around the furnace wall.
Preferably, 8 pairs of ultrasonic transmitters and ultrasonic receivers are arranged on one cross section of the furnace wall of the industrial furnace in an axisymmetric mode, and the temperature field on the cross section is averagely divided into 16 small areas and 24 independent sound emission and receiving paths.
Preferably, the same 8 pairs of ultrasonic transmitters and ultrasonic receivers are respectively arranged on different parallel cross sections of the industrial furnace in an axisymmetric mode, the ultrasonic transmitters and the ultrasonic receivers on the different parallel cross sections can transmit and receive ultrasonic signals from other cross sections, and each acoustic transmitter and each ultrasonic receiver are sequentially turned on and off in one temperature measurement period on the different cross sections to obtain a group of ultrasonic propagation time values.
On the other hand, the invention also provides an ultrasonic industrial furnace temperature measurement method based on a plurality of sound source arrangement modes, and the measurement in one period comprises the following steps:
step 1, resetting all built-in counters by a microprocessor, and waiting for a temperature measuring system to start working;
step 2, when the combustion of the industrial furnace starts, a P1.0 port of the microprocessor generates a pulse signal with the frequency of 40KHz, the pulse signal is amplified by an ultrasonic emission driving circuit of the ultrasonic emission module and then an ultrasonic probe of the ultrasonic emitter is excited to emit an ultrasonic pulse signal, and the recording time of the system at the moment is t1Meanwhile, a pulse signal of the microprocessor starts a counter through a trigger to sample ultrasonic pulse counting;
step 3, when the port P1.1 of the microprocessor detects a high level, an ultrasonic return signal penetrating through a fixed gas medium distance D is received, and the system records time t at the moment2The microprocessor turns off the counter through the trigger, and then the P1.1 port sends out two continuous pulses, the first pulseThe count value in the counter is stored in a storage, the second pulse is used for resetting the counter to prepare for counting for the next time, and meanwhile, the ultrasonic receiver receives a pulse signal received by the probe to trigger the transmitting probe of the next ultrasonic transmitter to transmit the next ultrasonic pulse signal;
step 4, the pulse signal received by the ultrasonic receiver is filtered, gain-amplified, sent to the microprocessor, and then sent to the PC through the microprocessor, and the time t recorded by the system in the PC is used as the time t1And t2Calculating the flight time of the ultrasonic wave emitted by the ultrasonic transmitter as tau-t2-t1According to the relationship between the time of flight τ of the ultrasonic wave and the temperature T of the medium
Figure BDA0002220041240000031
Calculating the medium temperature, namely reconstructing a temperature field in the industrial furnace in a PC (personal computer), wherein Z is a sound wave propagation medium constant, and D is the distance of sound wave propagation, namely the distance from the ultrasonic transmitter to the ultrasonic receiver;
and 5, repeating the steps 1-4 in different sections of the industrial furnace, and establishing a three-dimensional temperature field of the industrial furnace.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the ultrasonic industrial furnace temperature measurement system and method based on the multiple sound source arrangement mode can avoid the adverse effect of noise in the furnace on the sound wave signal and accurately measure the flight time of the sound wave temperature measurement signal; the ultrasonic wave flying path can be accurately established, and the ultrasonic wave flying path covers the whole temperature field; the temperature measuring device can avoid disturbance to a temperature field caused by a contact type temperature measuring device, more accurately measure the average temperature of a certain area, and establish a three-dimensional temperature field.
Drawings
FIG. 1 is a schematic structural diagram of an ultrasonic industrial furnace temperature measurement system based on a plurality of sound source arrangement modes according to an embodiment of the present invention;
FIG. 2 is a schematic view of an ultrasonic transmitter and ultrasonic receiver arrangement on a cross section of an industrial furnace according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for measuring temperature of an ultrasonic industrial furnace based on a plurality of sound source arrangements according to an embodiment of the present invention.
In the figure: 1. an ultrasonic receiver; 2. a hearth; 3. an ultrasonic transmitter.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the embodiment, 8 sound sources are arranged as an example, and the temperature of the industrial furnace is measured by using the ultrasonic industrial furnace temperature measuring system and method based on the arrangement mode of the sound sources.
An ultrasonic industrial furnace temperature measurement system based on a plurality of sound source arrangement modes is shown in figure 1 and comprises a plurality of ultrasonic transmitters 3, a plurality of ultrasonic receivers 1, an ultrasonic transmitting/receiving module, an ash blowing cooler, a high-temperature alarm protector, a microprocessor, an LCD display and a PC; the ultrasonic transmitter 3 and the ultrasonic receiver 1 are respectively connected with an ultrasonic transmitting module and an ultrasonic receiving module, and the ultrasonic transmitting/receiving module, the ash blowing cooler, the high-temperature alarm protector, the LCD display and the PC are respectively connected with the microprocessor;
the ultrasonic transmitter 3 is used for transmitting an amplified ultrasonic temperature measurement signal;
the ultrasonic receiver 1 is used for receiving an ultrasonic temperature measurement signal returned by the industrial furnace;
the plurality of ultrasonic transmitters 3 and the plurality of ultrasonic receivers 1 are arranged in pairs around the furnace wall. 8 pairs of ultrasonic transmitters 3 and ultrasonic receivers 1 are arranged on one cross section of the furnace wall of the industrial furnace in an axisymmetric mode, the temperature field on the cross section is averagely divided into 16 small areas, and 24 independent sound emission and receiving paths are shown in figure 2. The same 8 pairs of ultrasonic transmitters 3 and ultrasonic receivers 1 are respectively arranged on different parallel sections of the industrial furnace in an axisymmetric mode, the ultrasonic transmitters 3 and the ultrasonic receivers 1 on different parallel sections can transmit and receive ultrasonic signals from other sections, and each acoustic transmitter 3 and each ultrasonic receiver 1 are sequentially opened and closed in a temperature measurement period on different sections to obtain a group of ultrasonic propagation time values.
The ultrasonic transmitting/receiving module is used for amplifying and filtering signals; the ultrasonic transmitting/receiving module comprises an amplifying circuit and a filtering circuit; the ash blowing cooler is used for cleaning sound wave guide pipes in the ultrasonic transmitter 3 and the ultrasonic receiver 1;
the high-temperature alarm protector is used for giving an alarm when the temperatures of the ultrasonic transmitter 3 and the ultrasonic receiver 1 reach the set protection temperature;
the microprocessor is used for controlling the ultrasonic transmitter 3, the ultrasonic receiver 1, the ash blowing cooler and the high-temperature alarm protector;
the LCD is used for displaying real-time ultrasonic signal waveform and temperature measurement results;
the PC is used for calculating the flight time of the ultrasonic waves by using a correlation analysis algorithm, calculating an average temperature value on an ultrasonic wave path according to a certain algorithm, and simultaneously setting and calibrating the whole system;
the setting and calibration comprises setting of a calculation algorithm built in the PC and calibration of circuit connection of the microprocessor and other modules;
in this embodiment, the microprocessor is an STM32 microprocessor.
As shown in FIG. 3, the method for measuring the temperature of the ultrasonic industrial furnace based on the arrangement mode of a plurality of sound sources comprises the following steps:
step 1, resetting all built-in counters by a microprocessor, and waiting for a temperature measuring system to start working;
step 2, when the combustion of the industrial furnace starts, a P1.0 port of the microprocessor generates a pulse signal with the frequency of 40KHz, the pulse signal is amplified by an ultrasonic emission driving circuit of the ultrasonic emission module and then an ultrasonic probe of the ultrasonic emitter is excited to emit an ultrasonic pulse signal, and the recording time of the system at the moment is t1At the same time, micro-positioningA pulse signal of the processor starts a counter through a trigger to sample ultrasonic pulse counting;
step 3, when the port P1.1 of the microprocessor detects a high level, an ultrasonic return signal penetrating through a fixed gas medium distance D is received, and the system records time t at the moment2The microprocessor closes the counter through the trigger, then the P1.1 port sends out two continuous pulses, the first pulse stores the count value in the counter into the memory, the second pulse is used for clearing the counter to prepare for counting next time, and simultaneously, the ultrasonic receiver receives the pulse signal received by the probe to trigger the transmitting probe of the next ultrasonic transmitter to transmit the next ultrasonic pulse signal;
step 4, the pulse signal received by the ultrasonic receiver is filtered, gain-amplified, sent to the microprocessor, and then sent to the PC through the microprocessor, and the time t recorded by the system in the PC is used as the time t1And t2Calculating the flight time of the ultrasonic wave emitted by the ultrasonic transmitter as tau-t2-t1According to the relationship between the time of flight τ of the ultrasonic wave and the temperature T of the medium
Figure BDA0002220041240000051
Calculating the medium temperature, namely reconstructing a temperature field in the industrial furnace in a PC (personal computer), wherein Z is a sound wave propagation medium constant, and D is the distance of sound wave propagation, namely the distance from the ultrasonic transmitter to the ultrasonic receiver;
and 5, repeating the steps 1-4 in different sections of the industrial furnace, and establishing a three-dimensional temperature field of the industrial furnace.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions and scope of the present invention as defined in the appended claims.

Claims (5)

1.一种基于多个声源布置方式的超声波工业炉测温系统，其特征在于：包括多个超声波发射器、多个超声波接收器、超声波发射/接收模块、吹灰冷却器、高温报警保护器、微处理器、LCD显示器和PC机；所述超声波发射器和超声波接收器分别与超声波发射模块和超声波接收模块相连接，所述超声波发射模块、超声波接收模块、吹灰冷却器、高温报警保护器、LCD显示器和PC机分别与微处理器相连接；1. an ultrasonic industrial furnace temperature measurement system based on a plurality of sound source arrangements, is characterized in that: comprising a plurality of ultrasonic transmitters, a plurality of ultrasonic receivers, an ultrasonic transmitting/receiving module, a soot blower cooler, a high temperature alarm protection device, microprocessor, LCD display and PC; the ultrasonic transmitter and ultrasonic receiver are respectively connected with the ultrasonic transmitting module and the ultrasonic receiving module, the ultrasonic transmitting module, ultrasonic receiving module, soot blower cooler, high temperature alarm The protector, LCD display and PC are respectively connected with the microprocessor; 所述超声波发射器用于发出放大之后的超声波测温信号；The ultrasonic transmitter is used to send out the amplified ultrasonic temperature measurement signal; 所述超声波接收器用于接收经过工业炉返回的超声波测温信号；The ultrasonic receiver is used to receive the ultrasonic temperature measurement signal returned by the industrial furnace; 所述超声波发射/接收模块用于信号的放大、滤波处理；所述超声波发射/接收模块包括放大电路和滤波电路；所述吹灰冷却器用于清洁超声波发射器和超声波接收器中的声波导管；The ultrasonic transmitting/receiving module is used for signal amplification and filtering; the ultrasonic transmitting/receiving module includes an amplifier circuit and a filter circuit; the soot blower is used to clean the acoustic waveguide in the ultrasonic transmitter and the ultrasonic receiver; 所述高温报警保护器用于当超声波发射器和超声波接收器的温度达到设定的保护温度时，发出报警；The high temperature alarm protector is used to issue an alarm when the temperature of the ultrasonic transmitter and the ultrasonic receiver reaches the set protection temperature; 所述微处理器用于对超声波发射器、超声波接收器、吹灰冷却器和高温报警保护器的控制；The microprocessor is used to control the ultrasonic transmitter, the ultrasonic receiver, the soot blowing cooler and the high temperature alarm protector; 所述LCD显示器用于显示实时超声波信号波形和温度测量结果；The LCD display is used to display real-time ultrasonic signal waveform and temperature measurement results; 所述PC机用于使用相关分析的算法计算超声波飞行的时间，并按照一定的算法计算出超声波路径上平均温度值，同时完成对整个系统进行设定和校淮；The PC is used to calculate the flight time of the ultrasonic wave using the relevant analysis algorithm, and calculates the average temperature value on the ultrasonic path according to a certain algorithm, and completes the setting and calibration of the entire system at the same time; 所述设定和校准包括对PC机内置的计算算法的设定以及微处理器和其他模块的电路连接的校准。The setting and calibration include the setting of the calculation algorithm built in the PC and the calibration of the circuit connection of the microprocessor and other modules. 2.根据权利要求1所述的基于多个声源布置方式的超声波工业炉测温系统，其特征在于：所述多个超声波发射器和多个超声波接收器在炉墙的四周成对布置。2 . The ultrasonic industrial furnace temperature measurement system based on the arrangement of multiple sound sources according to claim 1 , wherein the multiple ultrasonic transmitters and the multiple ultrasonic receivers are arranged in pairs around the furnace wall. 3 . 3.根据权利要求1所述的基于多个声源布置方式的超声波工业炉测温系统，其特征在于：在工业炉炉墙的一个断面上呈轴对称方式布置8对超声波发射器和超声波接收器，将断面上的温度场平均分为16个小区域，24条独立的声发射和接收路径。3. The ultrasonic industrial furnace temperature measurement system based on the arrangement of multiple sound sources according to claim 1, characterized in that: 8 pairs of ultrasonic transmitters and ultrasonic receivers are arranged in an axisymmetric manner on a section of the furnace wall of the industrial furnace The temperature field on the section is divided into 16 small areas and 24 independent acoustic emission and reception paths. 4.根据权利要求1-3任一项所述的基于多个声源布置方式的超声波工业炉测温系统，其特征在于：在工业炉不同的平行断面上分别呈轴对称方式布置相同8对超声波发射器和超声波接收器，不同平行断面上的超声波发射器和超声波接收器能够向其他断面发射和接收来自其他断面的超声波信号，在不同的断面上的一个测温周期内顺序启闭各个声波发射器和超声波接收器，得到一组超声波传播时间值。4. The ultrasonic industrial furnace temperature measurement system based on the arrangement of multiple sound sources according to any one of claims 1-3, wherein the same 8 pairs are respectively arranged in an axisymmetric manner on different parallel sections of the industrial furnace Ultrasonic transmitters and ultrasonic receivers, ultrasonic transmitters and ultrasonic receivers on different parallel sections can transmit and receive ultrasonic signals from other sections to and from other sections, and sequentially turn on and off each sound wave in a temperature measurement cycle on different sections Transmitter and ultrasonic receiver, get a set of ultrasonic travel time values. 5.基于多个声源布置方式的超声波工业炉测温方法，基于权利要求4所述系统进行测温，其特征在于：一个周期内的测量包括以下步骤：5. The ultrasonic industrial furnace temperature measurement method based on the arrangement of multiple sound sources, based on the described system of claim 4, is characterized in that: the measurement in one cycle comprises the following steps: 步骤1、微处理器对其内置的所有计数器进行清零，等待测温系统开始工作；Step 1. The microprocessor clears all its built-in counters and waits for the temperature measurement system to start working; 步骤2、工业炉燃烧开始瞬间，微处理器的P1.0端口产生一个频率为40KHz的脉冲信号，此信号经超声波发射模块的超声波发射驱动电路对脉冲信号进行放大后激发超声波发射器的超声波探头发射超声波脉冲信号，系统此时记录时间为t1，与此同时，微处理器的脉冲信号通过触发器启动计数器，对超声波脉冲计数进行采样；Step 2. At the moment when the industrial furnace starts to burn, the P1.0 port of the microprocessor generates a pulse signal with a frequency of 40KHz. This signal is amplified by the ultrasonic transmission drive circuit of the ultrasonic transmission module to excite the ultrasonic probe of the ultrasonic transmitter. The ultrasonic pulse signal is emitted, the recording time of the system is t 1 at this time, at the same time, the pulse signal of the microprocessor starts the counter through the trigger to sample the ultrasonic pulse count; 步骤3、当微处理器P1.1端口检测到高电平时，即接收到穿过固定气体媒介距离D的超声波返回信号，此时系统记录时间为t2，微处理器通过触发器关闭计数器，然后P1.1端口发出两个连续脉冲，第一个脉冲将计数器内的计数值存入储存器，第二个脉冲是用来对计数器进行清零，准备进行下一次计数，同时，通过超声波接收器接收探头所接收到的脉冲信号去触发下一个超声波发射器的发射探头发射下一个超声波脉冲信号；Step 3. When the microprocessor P1.1 port detects a high level, it receives the ultrasonic return signal passing through the fixed gas medium distance D. At this time, the system recording time is t 2 , and the microprocessor closes the counter through the trigger. Then the P1.1 port sends out two continuous pulses. The first pulse stores the count value in the counter into the memory, and the second pulse is used to clear the counter and prepare for the next count. The transmitter receives the pulse signal received by the probe to trigger the transmitting probe of the next ultrasonic transmitter to transmit the next ultrasonic pulse signal; 步骤4、超声波接收器接收到的脉冲信号，经过滤波、增益放大，送至微处理器，再通过微处理器传送至PC机，在PC机中根据系统记录的时间t1和t2计算出超声波发射器发出的超声波飞行时间为τ＝t2-t1，根据超声波的飞行时间τ和介质温度T之间的关系
Figure FDA0002220041230000021
计算出介质温度，即在PC机中重建工业炉内温度场，其中，Z为声波传播介质常数，D为声波传播的距离，即超声波发射器到超声波接收器的距离；Step 4. The pulse signal received by the ultrasonic receiver is filtered, amplified by gain, sent to the microprocessor, and then transmitted to the PC through the microprocessor, and is calculated in the PC according to the times t1 and t2 recorded by the system. The flight time of the ultrasonic wave emitted by the ultrasonic transmitter is τ=t 2 -t 1 , according to the relationship between the flight time τ of the ultrasonic wave and the medium temperature T
Figure FDA0002220041230000021
Calculate the temperature of the medium, that is, reconstruct the temperature field in the industrial furnace in the PC, where Z is the constant of the sound wave propagation medium, and D is the distance of the sound wave propagation, that is, the distance from the ultrasonic transmitter to the ultrasonic receiver; 步骤5、在工业炉不同的断面内重复步骤1-4，建立工业炉的三维温度场。Step 5. Repeat steps 1-4 in different sections of the industrial furnace to establish a three-dimensional temperature field of the industrial furnace.
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CN112595431A (en) * 2020-10-22 2021-04-02 华帝股份有限公司 Temperature detection method for cooking equipment
WO2021217407A1 (en) * 2020-04-28 2021-11-04 华为技术有限公司 Temperature measurement system and method
CN113945298A (en) * 2021-11-20 2022-01-18 陕西岱南新能源工程有限公司 Hearth soot blowing sound wave temperature measurement system

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