Single-point temperature measuring device and temperature measuring system

Abstract

The application provides a single-point temperature measuring device and a temperature measuring system, and belongs to the technical field of infrared temperature measurement. The single-point temperature measuring device comprises a single-point infrared temperature measuring module, a line laser module fixing support and a line laser module. The line laser module fixing support is connected to the single-point infrared temperature measuring module, the line laser module is connected to the temperature measuring line laser module fixing support, and the single-point infrared temperature measuring module body of the single-point infrared temperature measuring module penetrates the temperature measuring line laser module fixing support and the line laser module. At least two groups of line laser lamps are placed on one side of the single-point infrared temperature measuring module body penetrating the line laser module. The laser emitted by the two groups of line laser lamps intersects to form a light beam, and the light beam is in the axial center direction of the single-point infrared temperature measuring module body. The single-point temperature measuring device realizes accurate positioning of a temperature measuring point.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of infrared temperature measurement technology, and in particular to a single-point temperature measurement device and a temperature measurement system. BACKGROUND

[0002] The infrared temperature measurement device is based on the blackbody radiation law, captures the infrared radiation energy emitted by an object, and deduces the temperature through photoelectric conversion and algorithm processing, and is widely used in industrial detection, medical diagnosis and other fields.

[0003] However, the existing single-point infrared non-contact temperature measurement cannot accurately locate the precise position corresponding to the measured temperature. SUMMARY

[0004] The present application provides a single-point temperature measurement device and a temperature measurement system to solve the technical problems raised in the background art.

[0005] To solve the above technical problems, the present application discloses a single-point temperature measurement device, comprising:

[0006] A single-point infrared temperature measurement module, a line laser module fixing bracket, and a line laser module are provided, the line laser module fixing bracket is connected to the single-point infrared temperature measurement module, the line laser module is connected to the temperature measurement line laser module fixing bracket, and the single-point infrared temperature measurement module body of the single-point infrared temperature measurement module penetrates the temperature measurement line laser module fixing bracket and the line laser module;

[0007] At least two groups of line laser lamps are placed on one side of the line laser module where the single-point infrared temperature measurement module body penetrates, the laser emitted by the two groups of line laser lamps intersects to form a light beam, and the light beam is in the axial center direction of the single-point infrared temperature measurement module body.

[0008] Preferably, the line laser module fixing bracket comprises a plate body one, the plate body one is provided with a through hole, the through hole is used for the single-point infrared temperature measurement module body to pass through, and the line laser lamp is arranged at the side edge of the through hole.

[0009] Preferably, the line laser lamp is tangent to the shape of the single-point infrared temperature measurement module body.

[0010] Preferably, the single-point infrared temperature measurement module comprises: a plate body two, and the single-point infrared temperature measurement module body is installed on the plate body two.

[0011] Preferably, the line laser lamp uses visible light.

[0012] Preferably, the line laser lamp uses a low-power milliwatt level laser chip, and the working mode is selected as a low-duty cycle and high-frequency mode.

[0013] Preferably, it further comprises:

[0014] Storage device: Stores the absorptivity of the linear laser lamp on the object under test, the ambient illuminance-minimum required laser power fitting curve; and the linear laser lamp power-standard laser power efficiency fitting curve of the object under test at the standard temperature measurement distance between the single-point infrared temperature measurement module body and the object under test.

[0015] An intelligent control device is electrically connected to the single-point infrared temperature measurement module body and the line laser lamp, respectively.

[0016] Environmental detection module: used to detect environmental parameters of the environment in which the single-point infrared temperature measurement module is located; the intelligent control device is electrically connected to the storage device and the environmental detection module respectively.

[0017] The intelligent control device is based on a storage device, an environmental detection module, and a single-point infrared temperature measurement module to control the operation of the laser lamp.

[0018] Preferably, the intelligent control device includes:

[0019] First acquisition module: used to acquire the contents stored in the storage device;

[0020] First determining module: used to determine the first temperature measurement time based on the standard temperature measurement distance of the single-point infrared temperature measurement module body and the single-point infrared temperature measurement module body;

[0021] The second determining module is used to determine the target minimum required line laser power and the standard laser power fitting curve at the temperature measurement point of the measured object, which are the corresponding values ​​of the current ambient illuminance detected by the environmental detection module in the ambient illuminance-minimum required laser power fitting curve.

[0022] Correction module: used to determine the target standard laser power efficiency based on the target minimum required laser power and the fitting curve of line laser lamp power - standard laser power efficiency of the measured object determined by the second determination module, and to correct the target standard laser power efficiency based on the detection results of the environmental detection module to obtain the corrected laser power efficiency;

[0023] First calculation module: used to calculate the first output power of the line laser corresponding to the current object under test based on the corrected laser power efficiency and the target minimum required line laser power.

[0024] Control module: Used to control the actual output laser power of the line laser lamp to be the first output power during a single temperature measurement of the object being measured by the single-point infrared temperature measurement module.

[0025] Preferably, the intelligent control device further includes:

[0026] The second calculation module is used to calculate the target irradiation time range of the line laser lamp on the current test object based on the minimum laser power required by the target and the allowable laser irradiation temperature rise range of the current test object, and to determine the total allowable irradiation time for a single irradiation by the line laser lamp.

[0027] Control module: Used to control the actual irradiation time of the line laser lamp to be the total allowable irradiation time of a single irradiation by the line laser lamp during a single temperature measurement of the object being measured by the single-point infrared temperature measurement module body.

[0028] The present invention also discloses a temperature measurement system, including the single-point temperature measurement device described above.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] This application provides a method for implementing a single-point temperature measurement device that can achieve accurate positioning. This method is simple to implement and has low cost.

[0031] A single-point infrared temperature measurement module is a component that acquires the temperature of an object being measured using infrared technology.

[0032] A line laser module is a component that enables two intersecting line lasers;

[0033] The line laser module mounting bracket is a structural component that enables accurate positioning of single-point infrared temperature measurement modules and line laser modules.

[0034] The two line laser lights need to be tangent to the shape of the single-point infrared temperature measurement module body, ensuring that the laser light emitted by each line laser passes through the center point of the single-point infrared temperature measurement module body. Thus, the intersection point of the two line lasers is the center point of the single-point infrared temperature measurement module body, and this center point will not change with the distance from the object being measured; it will always coincide. The line lasers use visible light (such as a 660 nm red laser), and the measured temperature is the temperature of the intersection point of the measured object.

[0035] Linear lasers can use low-power milliwatt-level laser chips, and the working mode can be selected as a low duty cycle and high frequency mode, so as not to affect subjective visual judgment and to ignore the effect of light shining on the object being measured on temperature.

[0036] This invention solves the problem mentioned in the background technology: existing single-point infrared non-contact temperature measurement cannot accurately locate the precise position corresponding to the measured temperature. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a structural exploded view of the present invention;

[0039] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0040] Figure 3 This is a schematic diagram of the optical path of the present invention;

[0041] Figure 4 This is a schematic diagram of the present invention irradiating the object under test;

[0042] Figure 5 This is a schematic diagram of the line laser lamp of the present invention;

[0043] Figure 6 This is a schematic diagram showing the distribution of the line laser lamps of the present invention.

[0044] In the diagram: 1. Single-point infrared temperature measurement module; 11. Single-point infrared temperature measurement module body; 12. Plate 2; 2. Linear laser module fixing bracket; 3. Linear laser module; 31. Linear laser lamp; 32. Plate 1; 33. Through hole; 4. Object being measured; 5. Temperature measurement point. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0046] Example 1:

[0047] This invention provides a single-point temperature measurement device, such as... Figures 1-6 As shown, it includes:

[0048] The system includes a single-point infrared temperature measurement module 1, a line laser module mounting bracket 2, and a line laser module 3. The line laser module mounting bracket 2 is connected to the single-point infrared temperature measurement module 1, and the line laser module 3 is connected to the temperature measurement line laser module mounting bracket 2. The single-point infrared temperature measurement module body 11 of the single-point infrared temperature measurement module 1 passes through the temperature measurement line laser module mounting bracket 2 and the line laser module 3.

[0049] At least two sets of line laser lamps 31 are placed on the side of the single-point infrared temperature measurement module body 11 that is penetrated by the line laser module 3. The lasers emitted by the two sets of line laser lamps 31 intersect to form a beam, and the beam is in the direction of the axis center of the single-point infrared temperature measurement module body 11.

[0050] The line laser module fixing bracket 2 includes a plate 32, which has a through hole 33 for the single-point infrared temperature measurement module body 11 to pass through, and the line laser lamp 31 is located on the side of the through hole 33.

[0051] The line laser lamp 31 is tangent to the shape of the single-point infrared temperature measurement module body 11.

[0052] The single-point infrared temperature measurement module 1 includes: a second plate 12, on which the single-point infrared temperature measurement module body 11 is installed.

[0053] Among them, the line laser light 31 uses visible light.

[0054] Among them, the line laser lamp 31 uses a low-power milliwatt-level laser chip and selects a low duty cycle, high frequency mode for operation.

[0055] Two line laser lights (model 31) are the minimum configuration, but it is not limited to two.

[0056] Line lasers are visible light, not limited to 660nm.

[0057] The present invention also discloses a temperature measurement system, which includes the single-point temperature measurement device described above.

[0058] The beneficial effects of the above technical solution are as follows:

[0059] This application provides a method for implementing a single-point temperature measurement device that can achieve accurate positioning. This method is simple to implement and has low cost.

[0060] The single-point infrared temperature measurement module 1 is a component that acquires the temperature of the object being measured 4 using infrared technology.

[0061] Line laser module 3 is a component that enables two intersecting line lasers;

[0062] The line laser module fixing bracket 2 is a structural component that enables accurate positioning of the single-point infrared temperature measurement module 1 and the line laser module 3.

[0063] The two line laser lights 31 need to be tangent to the shape of the single-point infrared temperature measurement module body 11 to ensure that the laser emitted by each line laser passes through the center point of the single-point infrared temperature measurement module body 11. In this way, the intersection of the two line lasers is the center point of the single-point infrared temperature measurement module body 11. This center point will not change with the change of distance from the measured object 4 and will always coincide.

[0064] Line lasers use visible light (such as a 660 nm red laser), and the measured temperature is the temperature at the intersection point of the measured object. The intersection point on the measured object 4 is the temperature measuring point 5;

[0065] Linear lasers can use low-power milliwatt-level laser chips, and the working mode can be selected as a low duty cycle and high frequency mode, so as not to affect subjective visual judgment and to ignore the effect of light shining on the object being measured on temperature.

[0066] This invention solves the problems raised in the background art:

[0067] Existing single-point infrared non-contact temperature measurement methods cannot accurately locate the precise position corresponding to the measured temperature.

[0068] Example 2, based on Example 1, further includes:

[0069] Storage device: Stores the absorptivity of the linear laser lamp 31 of the object under test 4, the ambient illuminance-minimum required laser power fitting curve; the linear laser lamp 31 power-standard laser power efficiency fitting curve of the object under test 4 at the standard temperature measurement distance between the single-point infrared temperature measurement module body 11 and the object under test 4, and the linear laser lamp 31 power-standard laser power fitting curve at the temperature measurement point of the object under test 4; all the above curves are based on test determination;

[0070] The intelligent control device is electrically connected to the single-point infrared temperature measurement module body 11 and the line laser lamp 31 respectively.

[0071] Environmental detection module: used to detect the environmental parameters of the environment in which the single-point infrared temperature measurement module body 11 is located; the intelligent control device is electrically connected to the storage device and the environmental detection module respectively.

[0072] The intelligent control device controls the operation of the laser lamp 31 based on the storage device, the environmental detection module, and the single-point infrared temperature measurement module body 11.

[0073] The intelligent control device includes:

[0074] First acquisition module: used to acquire the contents stored in the storage device;

[0075] The first determining module is used to determine the first temperature measurement time based on the standard temperature measurement distance of the single-point infrared temperature measurement module body 11 and the single-point infrared temperature measurement module body 11; wherein, the standard temperature measurement distance is the optimal temperature measurement distance calibrated by the device, such as 10cm; the first temperature measurement time is the time from the start of operation of the temperature measurement distance to the completion of temperature measurement to meet the temperature measurement requirements of the single-point infrared temperature measurement module body 11 at the standard temperature measurement distance (such as meeting "physical thermal balance" + "sensor response") (which can be determined based on testing).

[0076] The second determining module is used to determine the target minimum laser power required in the ambient illuminance-minimum laser power fitting curve detected by the environmental detection module. The horizontal axis of the ambient illuminance-minimum laser power fitting curve is the ambient illuminance, and the vertical axis is the minimum laser power required for the corresponding horizontal axis (for the ambient illuminance on the horizontal axis, in order to ensure that the laser emitted by the line laser lamp 31 is clearly visible and identifiable on the object being measured 4 (to meet the equipment temperature measurement alignment requirements), the minimum laser power required at the temperature measurement point (intersection point) is the "minimum required line laser lamp power").

[0077] Correction module: used to determine the target standard laser power efficiency based on the target minimum laser power required (target minimum laser power required at the temperature measurement point of the object under test 4) determined by the second determination module and the fitting curve of the line laser lamp 31 power - the standard laser power efficiency of the object under test 4 (obtain the target minimum laser power required by the second determination module, the target line laser lamp 31 power corresponding to the fitting curve of the line laser lamp 31 power - the standard laser power efficiency of the object under test 4, and determine the target standard laser power efficiency of the line laser lamp 31 power in the fitting curve of the line laser lamp 31 power - the standard laser power efficiency of the object under test 4), and correct the target standard laser power efficiency based on the detection results of the environmental detection module to obtain the corrected laser power efficiency;

[0078] ;

[0079] in, The corrected laser power efficiency; The target standard laser power efficiency is defined as the curve fitting the line laser lamp 31 power versus the standard laser power efficiency of the object under test 4, based on the reference ambient temperature. Reference ambient humidity Reference particulate matter concentration The following test was conducted to obtain the results; , , These are the ambient temperature, ambient humidity, and ambient particulate matter concentration detected by the environmental monitoring module, respectively.

[0080] , , These are the correction factors for laser power efficiency based on ambient temperature (in 1 / ℃), ambient humidity (in %), and ambient particulate matter concentration (in units).

[0081] First calculation module: used for calculation based on the corrected laser power efficiency. and the minimum laser power required for the target Calculate the first output power of the line laser lamp 31 corresponding to the current object under test 4. ;

[0082] in, ;

[0083] The second calculation module is used to calculate the target irradiation time range of the line laser lamp 31 on the current test object 4 based on the minimum laser power required by the target and the allowable laser irradiation temperature rise range of the current test object 4 (which can be determined based on the existing temperature rise model of the laser irradiated object), and to determine the total allowable irradiation time of a single irradiation by the line laser lamp 31.

[0084] The target illumination time range of the line laser 31 on the current test object 4 is: ; This is the minimum allowable temperature rise range for the current test object 4 under laser irradiation; This represents the maximum allowable temperature rise range for the current test object 4 under laser irradiation. This is the heat capacity of the current measured area of ​​the current measured object 4 (in J / ℃). The absorption rate of the line laser lamp 31 on the current test object 4;

[0085] ;

[0086] This is the rate of change of absorptivity with temperature, expressed in 1 / ℃, and can be determined based on laboratory calibration. The reference absorptivity of the line laser lamp 31 of the object being measured 4 (corresponding to reference conditions (including reference ambient temperature)).

[0087] The total irradiation time for a single irradiation by the linear laser lamp 31 is: t is the time when the laser from the line laser lamp 31 illuminates the current measured area of ​​the object 4 being measured.

[0088] exist The total irradiation time less than or equal to the first temperature measurement time is selected as the total allowable irradiation time for a single irradiation by the linear laser lamp 31 (the average of the smallest N values ​​can be selected).

[0089] Control module: used to control the actual output laser power of the line laser lamp 31 to the first output power and the actual irradiation time of the line laser lamp 31 to the total allowable irradiation time of the line laser lamp 31 during a single temperature measurement of the current object 4 by the single-point infrared temperature measurement module body 11.

[0090] 1. Standard temperature measurement distance acquisition method: Equipment factory calibration + on-site verification. Process:

[0091] (1) Factory calibration: In the laboratory, simulate an ideal environment (constant temperature, constant humidity, no interference) and test the temperature measurement accuracy at different distances. Select the distance with the "highest accuracy" as the standard temperature measurement distance.

[0092] (2) On-site verification: In practical applications, if there is a large amount of environmental interference (such as strong radiation or vibration), the standard temperature measurement distance can be finely adjusted and recalibrated.

[0093] 2. Method for obtaining the first temperature measurement time: Laboratory thermal equilibrium experiment + sensor response test. Procedure:

[0094] (1) Thermal balance test: At the standard temperature measurement distance, a blackbody furnace is used to simulate different temperatures and test the time required for "temperature stabilization";

[0095] (2) Response test: Test the time from "receiving radiation" to "outputting a stable signal" of the infrared sensor;

[0096] (3) Comprehensive determination: Determine the maximum time of (1) and (2) as the first temperature measurement time and store it in the storage device.

[0097] 3. Permissible temperature rise acquisition method: Material standard lookup + destructive testing. Procedure:

[0098] (1) Look up the table: Based on the material of the object being tested (such as electronic components or biological tissues), look up the industry standards / databases to obtain the allowable temperature rise;

[0099] (2) Destructive test: Perform gradient temperature rise test on the test object and record the "critical temperature of performance degradation" as the allowable temperature rise.

[0100] The beneficial effects of the above scheme are as follows:

[0101] By dynamically adjusting the laser power using the "ambient illuminance - minimum required laser power fitting curve," the laser markings are ensured to be clearly visible (counteracting ambient light interference), thus addressing the pain points of traditional infrared temperature measurement, namely "difficult alignment and large errors." Combined with the coordinated control of "standard temperature measurement distance + first temperature measurement time," "physical thermal balance + complete sensor response" are guaranteed during temperature measurement, improving single-point temperature measurement accuracy (e.g., from ±2℃ to ±0.5℃).

[0102] By using the "line laser lamp 31 power - standard laser power efficiency fitting curve of the object under test 4 and the line laser lamp 31 power - standard laser power fitting curve at the temperature measurement point of the object under test 4", the influence of environmental parameters (temperature, humidity, particulate matter) on laser energy transmission is corrected to ensure that the laser energy is accurately applied to the temperature measurement point (avoiding alignment failure due to environmental attenuation).

[0103] The environmental monitoring module covers temperature, humidity, and particulate matter concentration. It dynamically compensates for laser power efficiency through a correction coefficient, enabling the system to work stably in complex environments such as high-temperature workshops, outdoor rainy weather, and smoggy weather.

[0104] The storage device pre-stores parameters such as "absorption rate and heat capacity" and calculates the irradiation time in combination with the "allowable temperature rise range" to adapt to test objects of different materials (metals, rubber, biological tissues, etc.) and expand application scenarios (such as industrial production lines, medical testing, and environmental monitoring).

[0105] The maximum irradiation time is calculated by considering "allowable temperature rise range + heat capacity + absorptivity" to limit thermal damage to the test object caused by the laser (e.g., preventing precision electronic components from failing due to excessive temperature rise). Simultaneously, dynamic correction of the absorptivity with temperature further reduces the risk of "over-irradiation." System redundancy and coordination are also implemented.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A single-point temperature measurement device, characterized in that, include: A single-point infrared temperature measurement module (1), a temperature measurement line laser module fixing bracket (2), and a line laser module (3) are provided. The temperature measurement line laser module fixing bracket (2) is connected to the single-point infrared temperature measurement module (1), and the line laser module (3) is connected to the temperature measurement line laser module fixing bracket (2). The single-point infrared temperature measurement module body (11) of the single-point infrared temperature measurement module (1) passes through the temperature measurement line laser module fixing bracket (2) and the line laser module (3). At least two sets of line laser lamps (31) are placed on the side of the single-point infrared temperature measurement module body (11) through which the line laser module (3) passes. The lasers emitted by the two sets of line laser lamps (31) intersect to form a beam, and the beam is in the direction of the axis center of the single-point infrared temperature measurement module body (11). The temperature measuring line laser module fixing bracket (2) includes: Plate 1 (32), wherein a through hole (33) is provided, wherein the through hole (33) is used for the single-point infrared temperature measurement module body (11) to pass through, and the line laser lamp (31) is provided on the side of the through hole (33); The line laser lamp (31) is tangent to the shape of the single-point infrared temperature measurement module body (11); The single-point infrared temperature measurement module (1) includes: Plate 2 (12), on which a single-point infrared temperature measurement module body (11) is installed; The line laser lamp (31) uses a low-power milliwatt-level laser chip and selects a low duty cycle and high frequency mode for operation.

2. The single-point temperature measuring device according to claim 1, characterized in that, The line laser light (31) uses visible light.

3. The single-point temperature measuring device according to claim 1, characterized in that, Also includes: Storage device: stores the absorptivity of the line laser lamp (31) of the object under test (4) and the fitting curve of the ambient illuminance-minimum required laser power; the fitting curve of the power of the line laser lamp (31)-the standard laser power efficiency of the object under test (4) at the standard temperature measurement distance between the main body (11) of the single-point infrared temperature measurement module and the object under test (4). The intelligent control device is electrically connected to the single-point infrared temperature measurement module body (11) and the line laser lamp (31). Environmental detection module: used to detect the environmental parameters of the environment in which the single-point infrared temperature measurement module body (11) is located; the intelligent control device is electrically connected to the storage device and the environmental detection module respectively. The intelligent control device controls the operation of the line laser lamp (31) based on the storage device, the environmental detection module, the single-point infrared temperature measurement module body (11).

4. A single-point temperature measuring device according to claim 3, characterized in that, The intelligent control device includes: First acquisition module: used to acquire the contents stored in the storage device; First determining module: used to determine the first temperature measurement time based on the standard temperature measurement distance of the single-point infrared temperature measurement module body (11) and the single-point infrared temperature measurement module body (11); The second determining module is used to determine the target minimum demand line laser lamp (31) power and the standard laser power efficiency fitting curve at the temperature measurement point of the object under test (4) in the ambient illuminance-minimum demand laser power fitting curve of the current ambient illuminance detected by the environmental detection module. Correction module: used to determine the target standard laser power efficiency based on the target minimum required laser power and the standard laser power efficiency fitting curve of the line laser lamp (31) power - the measured object (4) determined by the second determination module, and to correct the target standard laser power efficiency based on the detection results of the environmental detection module to obtain the corrected laser power efficiency; First calculation module: used to calculate the first output power of the line laser (31) corresponding to the current object under test (4) based on the corrected laser power efficiency and the target minimum required line laser (31) power; Control module: used to control the actual output laser power of the line laser lamp (31) to the first output power during a single temperature measurement of the current object (4) by the single-point infrared temperature measurement module body (11).

5. A single-point temperature measuring device according to claim 4, characterized in that, The intelligent control device also includes: The second calculation module is used to calculate the target irradiation time range of the line laser lamp (31) on the current test object (4) based on the minimum laser power required by the target and the allowable laser irradiation temperature rise range of the current test object (4), and to determine the total allowable irradiation time of a single irradiation by the line laser lamp (31). Control module: used to control the actual irradiation time of the line laser lamp (31) to be the total allowable irradiation time of a single irradiation of the line laser lamp (31) during a single temperature measurement of the current object (4) by the single-point infrared temperature measurement module body (11).

6. A temperature measurement system, characterized in that, The temperature measurement system includes a single-point temperature measurement device as described in any one of claims 1-5.

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