CN213021952U

CN213021952U - Long-distance infrared temperature measurement batch calibration device

Info

Publication number: CN213021952U
Application number: CN202020437915.XU
Authority: CN
Inventors: 吕晶; 王斌; 汪晓波
Original assignee: Hangzhou Multi Ir Technology Co ltd
Current assignee: Hangzhou Multi Ir Technology Co ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2021-04-20
Anticipated expiration: 2030-03-30

Abstract

The utility model discloses a long-distance infrared temperature measurement batch calibration device, which consists 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.

Description

Long-distance infrared temperature measurement batch calibration device

Technical Field

The utility model relates to a long distance infrared temperature measurement is calibration device in batches, specifically is applied to the demarcation 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.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a long distance infrared temperature measurement is calibration device in batches realizes the batch of temperature measuring instrument and marks.

The above technical purpose of the present invention can be achieved by the following technical solutions:

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.

Based on the infrared temperature measurement batch calibration device, a batch calibration method is provided, and the one-time calibration method of one calibration point is as follows:

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 one-time complete calibration process comprises heating calibration and cooling calibration, and 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 of each unit distance s (such as 10 CM);

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.

To sum up, the utility model discloses the beneficial effect who contrasts in prior art does: 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.

Detailed Description

The following provides a more detailed description of the present invention 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.

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 calibration points for temperature rise calibration are shown in the following table.

	30	31	32	33	34	35	36	37	38	39	40
												0.5	1	8	9	16	17	21	28	29	36	37	44
0.6	2	7	10	15	18	22	27	30	35	38	43
												0.7	3	6	11	14	19	23	26	31	34	39	42
0.8	4	5	12	13	20	24	25	32	33	40	41

The first row in the table is temperature, the first is distance, and the table is the order of the calibration points; the table shows 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 only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims

1. The utility model provides a long distance infrared temperature measurement is calibration device in batches which characterized by: the blackbody radiation surface is composed of a movable workbench, an instrument seat, a central controller, a guide rail and a blackbody 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.

2. The long-distance infrared temperature measurement batch calibration device as claimed in claim 1, wherein: 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 the set temperature.

3. The long-distance infrared temperature measurement batch calibration device as claimed in claim 2, wherein: the movable working table consists of a guide rail control motor and a stroke detector, and the position of the working table on the guide rail is changed according to a set distance.

4. The long-distance infrared temperature measurement batch calibration device as claimed in claim 3, wherein: 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.