阅读说明：本技术 一种长距离的红外测温批量标定方法和装置 (Long-distance infrared temperature measurement batch calibration method and device ) 是由 吕晶 王斌 汪晓波 于 2020-03-30 设计创作，主要内容包括：本发明公开了一种长距离的红外测温批量标定方法和装置,由移动工作台、仪表座、中控器、导轨和黑体辐射面组成；黑体辐射面由黑体加热器、温度传感器和黑体辐射面组成,按照设定的温度向外发射红外线；移动工作台由导轨控制电机和行程检测器组成,按照设定的距离改变工作台在导轨上的位置；中控器固定在移动工作台,通过信息连接到仪表座、导轨电机、黑体加热器和黑体接触式温度传感器；仪表座连接到移动工作台,用于固定批量标定的仪表；移动工作台固定与导轨上以实现在导轨上移动,改变仪表座到黑体辐射面之间的距离；黑体辐射面辐射面固定在导轨上端侧,发出不同温度的辐射。(The invention discloses a long-distance infrared temperature measurement batch calibration method and a long-distance infrared temperature measurement batch calibration device, which are composed of a movable workbench, an instrument seat, a central controller, a guide rail and a black body radiation surface; the black body radiation surface consists of a black body heater, a temperature sensor and a black body radiation surface and emits infrared rays outwards according to a set temperature; the movable workbench consists of a guide rail control motor and a stroke detector, and the position of the workbench on the guide rail is changed according to a set distance; the central controller is fixed on the movable workbench and is connected to the instrument base, the guide rail motor, the black body heater and the black body contact type temperature sensor through information; the instrument base is connected to the movable workbench and used for fixing the batch calibrated instruments; the movable workbench is fixed on the guide rail to move on the guide rail, and the distance between the instrument seat and the black body radiation surface is changed; the black body radiation surface is fixed on the upper end side of the guide rail and emits radiation with different temperatures.)

1. A long-distance infrared temperature measurement batch calibration method is characterized in that a calibration device consisting of a movable workbench, an instrument seat, a central controller, a guide rail and a black body radiation surface is adopted, a complete calibration process comprises temperature rise calibration and temperature reduction calibration, the temperature from low to high is the temperature rise calibration, and the process of natural temperature reduction is called as temperature reduction calibration; the batch calibration method comprises the following specific calibration methods:

the temperature rise calibration adopts variable distance, and the calibration point takes the values of distance, measurement range and temperature precision resolution per unit distance s;

the temperature reduction calibration adopts a fixed distance, when the fixed distance is fixed, the temperature of the calibration point is a continuous value of natural temperature reduction sampling, and the number of the calibration values is related to the difference value of the natural environment.

2. The long-distance infrared temperature measurement batch calibration method according to claim 1, wherein one calibration point calibration method at a time comprises the following steps:

step 1: fixing a production batch of infrared thermometers on the instrument base to ensure that a communication interface of the instrument is connected with an interface on the instrument base and the size clamping position is correct;

step 2: adjusting the temperature of the blackbody radiation surface to be stabilized to a temperature reference T0;

and step 3: after t1 time after the temperature of the blackbody radiation surface is stable, adjusting the distance from the movable workbench to the blackbody radiation surface to L1, such as L1 of 50 cm;

and 4, step 4: the central controller sends the distance L1 and the reference temperature T0 to the instrument through a communication interface on the instrument base to carry out the first calibration point.

3. A long-distance infrared temperature measurement batch calibration device is characterized by comprising a movable workbench, an instrument seat, a central controller, a guide rail and a black body radiation surface; the instrument base is connected to the movable workbench and used for fixing the batch calibrated instruments; the movable workbench is fixed on the guide rail to move on the guide rail, and the distance between the instrument seat and the black body radiation surface is changed; the black body radiation surface is fixed on the upper end side of the guide rail and emits radiation with different temperatures.

4. The long-distance infrared temperature measurement batch calibration device as claimed in claim 3, wherein the blackbody radiation surface is composed of a blackbody heater, a temperature sensor and a blackbody radiation surface, and emits infrared rays outwards according to a set temperature.

5. The long-distance infrared temperature measurement batch calibration device as claimed in claim 4, wherein the movable worktable comprises a guide rail control motor and a stroke detector, and the position of the worktable on the guide rail is changed according to the set distance.

6. The long-distance infrared temperature measurement batch calibration device as claimed in claim 5, wherein the central controller is fixed on the movable workbench and is connected to the gauge stand, the guide rail motor, the black body heater and the black body contact type temperature sensor through information.

Technical Field

The invention relates to a method and a device for calibrating long-distance infrared temperature measurement in batches, which are particularly applied to calibration of long-distance infrared temperature measurement equipment.

Background

In 1800 years, the british physicist f.w. huxlel investigated various colors from a thermal point of view, and found infrared rays. Infrared is an electromagnetic wave having the same nature as radio waves and visible light. The infrared ray has a wavelength of 0.76 to 1000 μm, and is classified into four types, near infrared, mid-infrared, far infrared, and far infrared, according to the wavelength range, and the position of the infrared ray in the continuous spectrum of the electromagnetic wave is a region between the radio wave and the visible light. The infrared thermometer can quickly provide temperature measurement, and the precision is usually within 1 degree. Unlike contact thermometers, infrared thermometers can safely read a target temperature that is difficult to access or unreachable, you can read the target temperature within the range allowed by the instrument. Non-contact temperature measurements can also be made in areas that are unsafe or have difficulty with contact temperature measurement, such as near steam valves or furnaces, without risking burning the fingers without worry when they come into contact with temperature measurement.

The infrared thermometer consists of an optical system, a photoelectric detector, a signal amplifier, a signal processing part, a display output part and the like. The optical system converges the infrared radiant energy of the target in the visual field, and the size of the visual field is determined by the optical parts and the position of the thermometer; the infrared energy is focused on the photoelectric detector and converted into corresponding electric signals, and the signals are converted into the temperature value of the measured target after passing through an amplifier and a signal processing circuit and being corrected according to the algorithm of the instrument internal therapy and the target emissivity.

The infrared thermometer must be calibrated to correctly display the temperature of the target to be measured, and because the high-precision temperature measuring instrument needs to overcome systematic errors caused by inconsistency of various devices in the temperature measuring link, calibration in the mass production and manufacturing process of the infrared thermometer is a difficult problem in manufacturing.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a long-distance infrared temperature measurement batch calibration method and device, so that batch calibration of temperature measurement instruments is realized.

The technical purpose of the invention is realized by the following technical scheme:

a long-distance infrared temperature measurement batch calibration method adopts a calibration device consisting of a movable workbench, an instrument seat, a central controller, a guide rail and a black body radiation surface, wherein a complete calibration process comprises temperature rise calibration and temperature reduction calibration, the temperature from low to high is the temperature rise calibration, and the natural temperature reduction process is called as temperature reduction calibration; the batch calibration method comprises the following specific calibration methods:

the temperature rise calibration adopts variable distance, and the calibration point takes the values of distance, measurement range and temperature precision resolution per unit distance s;

the temperature reduction calibration adopts a fixed distance, when the fixed distance is fixed, the temperature of the calibration point is a continuous value of natural temperature reduction sampling, and the number of the calibration values is related to the difference value of the natural environment.

The temperature-rise calibration and the temperature-fall calibration need to be carried out on multiple points and multiple times according to the distance, the measurement range and the temperature precision resolution value of each unit distance s, and the once calibration method for one calibration point is specifically explained and comprises the following steps:

step 1: fixing a production batch of infrared thermometers on the instrument base to ensure that a communication interface of the instrument is connected with an interface on the instrument base and the size clamping position is correct;

step 2: adjusting the temperature of the blackbody radiation surface to be stabilized to a temperature reference T0;

and step 3: after t1 time after the temperature of the blackbody radiation surface is stable, adjusting the distance from the movable workbench to the blackbody radiation surface to L1, such as L1 of 50 cm;

and 4, step 4: the central controller sends the distance L1 and the reference temperature T0 to the instrument through a communication interface on the instrument base to carry out the first calibration point.

The calibration device used in the above calibration method is described in detail as follows:

a long-distance infrared temperature measurement batch calibration device comprises a movable workbench, an instrument seat, a central controller, a guide rail and a black body radiation surface; the black body radiation surface consists of a black body heater, a temperature sensor and a black body radiation surface and emits infrared rays outwards according to a set temperature; the movable workbench consists of a guide rail control motor and a stroke detector, and the position of the workbench on the guide rail is changed according to a set distance; the center controller is fixed on the movable workbench and is connected to the instrument base, the guide rail motor, the black body heater and the black body contact type temperature sensor through information.

The instrument base is connected to the movable workbench and used for fixing the batch calibrated instruments; the movable workbench is fixed on the guide rail to move on the guide rail, and the distance between the instrument seat and the black body radiation surface is changed; the black body radiation surface is fixed on the upper end side of the guide rail and emits radiation with different temperatures.

In summary, compared with the prior art, the beneficial effects of the invention are as follows: the infrared temperature measuring instruments in a production batch are placed on the instrument seat, under the control of the central controller and the moving support of the guide rail, temperature rising calibration is completed by changing the distance between the instrument seat and the black body radiation surface and the temperature of the black body radiation surface, and cooling calibration is completed by a natural temperature falling mode, so that batch calibration of the infrared temperature measuring equipment is finally realized.

Drawings

FIG. 1 is a schematic structural diagram of an infrared temperature measurement batch calibration device in an embodiment;

FIG. 2 is a schematic diagram of an embodiment of a temperature-increasing calibration point.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings.

A long-distance infrared temperature measurement batch calibration device is shown in figure 1 and comprises a movable workbench, an instrument seat, a central controller, a guide rail and a black body radiation surface; the black body radiation surface consists of a black body heater, a temperature sensor and a black body radiation surface and emits infrared rays outwards according to a set temperature; the movable workbench consists of a guide rail control motor and a stroke detector, and the position of the workbench on the guide rail is changed according to a set distance; the center controller is fixed on the movable workbench and is connected to the instrument base, the guide rail motor, the black body heater and the black body contact type temperature sensor through information.

The instrument base is connected to the movable workbench and used for fixing the batch calibrated instruments; the movable workbench is fixed on the guide rail to move on the guide rail, and the distance between the instrument seat and the black body radiation surface is changed; the black body radiation surface is fixed on the upper end side of the guide rail and emits radiation with different temperatures.

A long-distance infrared temperature measurement batch calibration method comprises a complete calibration process including temperature rise calibration and temperature reduction calibration, wherein the temperature rise calibration is carried out in the process of temperature from low to high, and the process of temperature natural temperature reduction is called temperature reduction calibration; the batch calibration method comprises the following specific calibration methods:

the temperature rise calibration adopts variable distance, and the calibration point takes the values of distance, measurement range and temperature precision resolution per unit distance s;

the temperature reduction calibration adopts a fixed distance, when the fixed distance is fixed, the temperature of the calibration point is a continuous value of natural temperature reduction sampling, and the number of the calibration values is related to the difference value of the natural environment.

The temperature-rise calibration and the temperature-fall calibration need to be carried out on multiple points and multiple times according to the distance, the measurement range and the temperature precision resolution value of each unit distance s, and the once calibration method for one calibration point is specifically explained and comprises the following steps:

step 1: fixing a production batch of infrared thermometers on the instrument base to ensure that a communication interface of the instrument is connected with an interface on the instrument base and the size clamping position is correct;

step 2: adjusting the temperature of the blackbody radiation surface to be stabilized to a temperature reference T0;

and step 3: after t1 time after the temperature of the blackbody radiation surface is stable, adjusting the distance from the movable workbench to the blackbody radiation surface to L1, such as L1 of 50 cm;

and 4, step 4: the central controller sends the distance L1 and the reference temperature T0 to the instrument through a communication interface on the instrument base to carry out the first calibration point.

In combination with a specific case, the implementation method for batch calibration of the infrared thermometers is as follows:

the distance of a certain thermodetector is 0.5-0.8 m, the measurement range is 30-40 ℃, the measurement precision is 1 ℃, and the calibrated point of temperature rise calibration is shown in figure 2.

The first row in the graph is temperature, the first is distance, and the table is the order of the index points; it can be seen from the figure that there are 44 calibration points, the 1 st calibration point is 30 ℃ and 0.5 m, and the 2 nd calibration point is 30 ℃ and 0.6 m; it needs to calibrate 44 calibration points to complete one temperature-rise calibration.

After the temperature rise calibration is finished, the temperature reduction calibration is finished, the workbench stays at a position of 0.5 meter, and the black body radiation surface stops heating for natural temperature reduction; each sampling period is 1 second, the central controller sends the temperature of the black body radiation surface to an instrument through an instrument seat communication interface for calibration; and when the temperature of the black body is 25 ℃ at room temperature, the temperature reduction time of the black body is 180 seconds, and the number of the calibration points is 180.

The precision of the instrument is more accurate through temperature rise calibration and temperature drop calibration.

The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.