A light source device for measuring the temperature measurement spot diameter of an infrared temperature sensor

Abstract

The utility model discloses a light source device for measuring infrared temperature sensor temperature measurement light spot diameter belongs to infrared temperature measurement technology and sensor calibration technical field. The device includes lamp stand, base, light source, diaphragm, adjusting mechanism and measuring mechanism, and the diaphragm outer ring's aperture ring is used for adjusting diaphragm aperture size, the lamp stand is the hollow structure, and the light source is installed in the lamp stand inner top portion, the lamp stand bottom is connected with the base, and the lamp stand bottom is equipped with the ground glass, and the ground glass is located the base top, the base central has been seted up and has exported the light mouth, and the diaphragm is installed in the light export position, the adjusting mechanism includes the adjusting gear of being located in the diaphragm outer ring, and the knob gear is engaged with the adjusting gear, and the adjusting gear is cooperated with the aperture ring of diaphragm outer ring, the measuring mechanism includes the ball screw, the slider of being set on the ball screw and the laser distance measuring instrument of being located the slider top, and the ball screw is coaxial connection with the knob gear. The utility model discloses is used to solve the problem of big light spot diameter measurement error in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of infrared temperature measurement technology and sensor calibration technology, and in particular to a light source device for measuring the diameter of the temperature measurement spot of an infrared temperature sensor. Background Technology

[0002] Point-type infrared temperature sensors are widely used due to their convenience in non-contact temperature measurement. During temperature measurement, the diameter of the effective measurement spot is one of the core performance parameters, directly determining the sensor's adaptability to targets of different sizes and affecting its practical application. Therefore, accurate measurement of the temperature measurement spot diameter is crucial in the product development of point-type infrared temperature sensors.

[0003] Currently, the common technical solution used in the industry for measuring the spot diameter of point-type infrared temperature sensors is to use a blackbody furnace as the light source. However, the blackbody furnace itself does not have an aperture for measuring the spot size, and the exit port of the blackbody furnace lacks a structural interface for installing an aperture. Even if an aperture is installed, because the aperture is located at the exit port, and the blackbody furnace used for calibrating point-type infrared temperature sensors is generally a hollow blackbody furnace with its target surface extending more than 20 centimeters into the exit port, there is a significant distance difference between the aperture and the actual light-emitting position. This results in the spot size measured at the exit port not accurately reflecting the actual spot size detected by the sensor, leading to insufficient accuracy in the measurement results.

[0004] Therefore, designing a light source device that can accurately match the requirements for spot diameter measurement and overcome the inherent defects of existing blackbody furnace solutions is of great practical significance for improving the performance testing quality of point infrared temperature sensors during the research and development stage. Utility Model Content

[0005] This invention provides a light source device for measuring the diameter of the infrared temperature sensor spot, which can solve the problem of large measurement error in the spot diameter in the prior art.

[0006] A light source device for measuring the diameter of a temperature measuring spot of an infrared temperature sensor includes a lamp holder, a base, a light source, and an aperture. The aperture ring around the outer edge of the aperture is used to adjust the aperture size. The device also includes an adjustment mechanism and a measuring mechanism.

[0007] The lamp holder has a hollow structure, and the light source is installed inside the top of the lamp holder;

[0008] The bottom of the lamp holder is connected to the base, and the bottom of the lamp holder is provided with frosted glass, which is located above the base;

[0009] The base has a light outlet in the center, and the aperture is installed at the light outlet.

[0010] The adjustment mechanism includes an adjustment gear disposed on the outer ring of the aperture, and a turning gear meshing with the adjustment gear, wherein the adjustment gear cooperates with the aperture ring of the outer ring of the aperture;

[0011] The measuring mechanism includes a ball screw, a slider, and a laser distance measuring instrument. The ball screw is coaxially connected to the actuating gear, the slider is sleeved on the ball screw, and the laser distance measuring instrument is located above the slider.

[0012] Furthermore, the lamp holder is equipped with a parabolic reflector inside.

[0013] Furthermore, the light source is a halogen tungsten lamp, and the filament of the halogen tungsten lamp is located at the focal point of the parabolic reflector.

[0014] Furthermore, the bottom of the inner wall of the lamp holder is provided with a stepped structure, and the frosted glass is fixedly installed on the stepped structure with glue.

[0015] Furthermore, there is a gap between the aperture and the frosted glass.

[0016] Furthermore, the distance between the aperture and the frosted glass is less than 1 cm.

[0017] Furthermore, the lamp holder has multiple ventilation holes on its top.

[0018] Furthermore, a cooling fan is provided on the top of the lamp holder.

[0019] Furthermore, the light source device for measuring the diameter of the infrared temperature sensor spot also includes a constant voltage and constant current source, which is electrically connected to the light source.

[0020] Furthermore, the light source device for measuring the diameter of the infrared temperature sensor spot also includes a housing, which is located at the bottom of the base, and an operating port is provided on the side of the housing near the actuating gear.

[0021] The beneficial effects of this utility model are:

[0022] 1. This utility model provides a light source device for measuring the diameter of the temperature measuring spot of an infrared temperature sensor. The lamp holder has a frosted glass at the bottom. Because the surface of the frosted glass is not smooth, the light incident from one side of the frosted glass is diffusely reflected by the frosted glass and the light emitted is no longer directional but scattered in all directions. Therefore, for the infrared temperature sensor, the surface of the frosted glass can be regarded as the position of the light source. At the same time, the frosted glass is located above the base and the aperture is installed at the light outlet position in the center of the base, which significantly shortens the distance between the frosted glass and the aperture, fundamentally solving the measurement error problem caused by the large distance between the light outlet and the target surface of the traditional blackbody furnace.

[0023] 2. This utility model includes an adjustment mechanism and a measuring mechanism, which work together to accurately adjust and measure the aperture diameter. In the adjustment mechanism, a shifting gear meshes with an adjusting gear on the outer ring of the aperture. Rotating the shifting gear drives the adjusting gear and its meshing aperture ring to rotate, achieving convenient and stable adjustment of the aperture diameter. The measuring mechanism is linked to the adjustment mechanism, with a ball screw coaxially connected to the shifting gear. When the shifting gear rotates to adjust the aperture, the ball screw rotates synchronously, driving a slider to move along the screw. A laser distance measuring instrument located above the slider can accurately calculate the actual size of the aperture diameter by measuring the distance to the slider in real time. This design eliminates the subjective error of manual adjustment, significantly improves the accuracy of aperture diameter measurement, and thus achieves accurate indirect measurement of the diameter of the infrared temperature sensor's light spot, solving the problem of large measurement errors in the existing technology. Attached Figure Description

[0024] Figure 1 A schematic diagram of a light source device for measuring the diameter of an infrared temperature sensor spot, provided by this utility model;

[0025] Figure 2 A cross-sectional view of a light source device for measuring the diameter of a temperature measuring spot of an infrared temperature sensor, provided by this utility model;

[0026] Figure 3 An exploded view of a light source device for measuring the diameter of a temperature measuring spot of an infrared temperature sensor, provided by this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Lamp holder; 2. Base; 3. Cover; 4. Laser distance measuring instrument; 5. Cooling fan; 6. Halogen tungsten lamp; 7. Reflector; 8. Aperture; 9. Adjusting gear; 10. Actuating gear; 11. Ball screw; 12. Slider; 13. Frosted glass. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figure 1As shown in the figure, the present invention provides a light source device for measuring the diameter of the infrared temperature sensor spot, which mainly includes a lamp holder 1, a base 2, a light source, an aperture 8, an adjustment mechanism, a measuring mechanism, a frosted glass 13, a cooling fan 5, a constant voltage and constant current source, and a cover 3. The components work together to achieve accurate, efficient, and energy-saving spot measurement.

[0031] Specifically, such as Figures 1-3 As shown, the lamp holder 1 adopts a hollow cylindrical structure. An annular outer step structure is formed at the bottom of the outer wall of the lamp holder 1. The base 2 is fitted onto the aforementioned outer step structure and connected to the bottom of the lamp holder 1. A circular light outlet adapted to the aperture 8 is formed in the center of the base 2. An annular mounting groove is provided at the edge of the light outlet. The aperture 8 is fixed to the light outlet position through the mounting groove. The outer ring of the aperture 8 is an aperture ring; rotating the aperture ring can be used to adjust the aperture size. A parabolic reflector 7 is provided inside the lamp holder 1. The light source is a halogen tungsten lamp 6, which is fixedly installed at the center of the top of the lamp holder 1. Furthermore, the filament of the halogen tungsten lamp 6 is precisely located at the focal point of the parabolic reflector 7; the bottom of the inner wall of the lamp holder 1 is provided with an annular inner step structure, and the frosted glass 13 is fixed to the aforementioned inner step structure with high-temperature resistant adhesive, located above the base 2, and there is a millimeter-level gap between the frosted glass 13 and the aperture 8, with a distance of less than 1 cm; multiple evenly distributed ventilation holes are opened on the top of the lamp holder 1, and a cooling fan 5 is fixedly installed on the top of the lamp holder 1; the constant voltage and constant current source is electrically connected to the halogen tungsten lamp 6 and the cooling fan 5 respectively through wires, and the constant voltage and constant current source is not shown in the figure.

[0032] The hollow structure of the lamp holder 1 provides installation space for components such as the light source and the reflector 7. The parabolic reflector 7 can reflect the light from the light source to improve the efficiency of the light source. The inner stepped structure provides a stable installation reference for the frosted glass 13, and the frosted glass 13 is fixed with glue to ensure that it is installed firmly and flat. The light outlet of the base 2 provides a dedicated installation interface for the aperture 8, which solves the problem of the blackbody furnace having no compatible interface.

[0033] The light source uses a halogen tungsten lamp 6, combined with a parabolic reflector 7 and frosted glass 13, which can form uniform light output in the infrared to visible light band. The filament is located at the focal point of the parabolic surface, which can make the reflected light form parallel light and ensure the stability of light propagation. In addition, the heating and cooling of blackbody furnaces is relatively time-consuming, usually requiring tens of minutes to one or two hours, so the efficiency is not high. Moreover, blackbody furnaces are high-power devices, usually requiring two to three kilowatts of power supply, resulting in serious energy waste. The power of the halogen tungsten lamp 6 is far less than 1 / 10 of that of the blackbody furnace, which can significantly reduce energy consumption and has a significant energy-saving effect.

[0034] The frosted glass 13 can diffusely reflect the direct light from the halogen tungsten lamp 6 and the reflected light from the reflector 7. The light incident from one side of the frosted glass 13 is diffusely reflected by the frosted glass 13 and the emitted light no longer has its original directionality but is scattered in all directions. Therefore, for the infrared temperature sensor, the surface of the frosted glass 13 can be regarded as the position of the light source. The extremely small gap can shorten the distance between the light emission position (frosted glass 13) and the aperture 8. Therefore, it can be regarded that adjusting the aperture size of the aperture 8 is to adjust the size of the light spot emitted by the light source, avoiding the measurement error of the light spot size caused by the excessive distance, and solving the core problem of the long distance between the light outlet of the blackbody furnace and the target surface.

[0035] The ventilation holes and cooling fan 5 work together to form a heat dissipation channel. The cooling fan 5 creates a negative pressure inside the device, carrying away the heat generated by the halogen lamp 6 and expelling it through the ventilation holes, effectively controlling the temperature rise of the device and extending its service life. The constant voltage and constant current source can provide a constant voltage to the cooling fan 5 to ensure stable heat dissipation, while providing a stable current output to the halogen lamp 6 to ensure that the light source quickly reaches and maintains a stable state. After the device is turned on, it only takes a few seconds to achieve stable light output, greatly improving work efficiency. The intensity of the light source can be changed by adjusting the current to meet the measurement scenarios with different light intensity requirements.

[0036] Specifically, such as Figures 1-3 As shown, the adjustment mechanism consists of an adjustment gear 9 located on the outer ring of the aperture 8 and a shift gear 10 meshing with the adjustment gear 9. The adjustment gear 9 is connected to the aperture ring on the outer ring of the aperture 8 by a key, and the shift gear 10 is mounted on the side wall of the base 2 by a bearing. A cover 3 is connected to the bottom of the base 2 by a snap fastener. A rectangular operating port is provided on the side of the cover 3 near the shift gear 10. When the shift gear 10 is manually shifted through the operating port, the adjustment gear 9 is rotated, thereby adjusting the aperture diameter of the aperture 8.

[0037] In addition, such as Figures 1-3 As shown, the measuring mechanism includes a ball screw 11, a slider 12, and a laser distance measuring instrument 4. The ball screw 11 is coaxially connected to the actuating gear 10 and is vertically mounted on one side of the device along the axial direction of the lamp holder 1. The slider 12 is sleeved on the ball screw 11 and abuts against the top of the nut on the ball screw 11. The laser distance measuring instrument 4 is fixed on the side wall of the lamp holder 1 at the position corresponding to the slider 12 and is located above the slider 12. When the actuating gear 10 rotates, the coaxial ball screw 11 rotates synchronously, driving the nut to move along the screw axial direction, thereby driving the slider 12 to move along the axial direction of the lamp holder 1. By measuring the distance to the slider 12 in real time, the laser distance measuring instrument 4 can accurately calculate the aperture size of the aperture 8, thereby indirectly measuring the spot diameter and improving the measurement accuracy.

[0038] The working principle of this utility model is as follows.

[0039] In use, a constant voltage and constant current source powers the halogen lamp 6 and the cooling fan 5, causing the halogen lamp 6 to heat up rapidly. After being reflected by the parabolic reflector 7, the light is directed onto the frosted glass 13 and scattered on its surface, causing the light emission position to shift to the frosted glass 13. The cooling fan 5 starts simultaneously to dissipate heat under negative pressure. After the light source stabilizes, the gear 10 is turned through the operating port of the cover 3. The gear meshes and drives the adjusting gear 9 of the aperture 8 to rotate, which in turn changes the aperture of the aperture 8. At the same time, the gear 10 drives the ball screw 11 to rotate, causing the slider 12 to move along the screw. The laser distance measuring instrument 4 measures the distance to the slider 12 in real time and calculates the current aperture of the aperture 8, thereby obtaining the diameter of the temperature measuring spot.

[0040] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A light source device for measuring the diameter of a temperature measuring spot of an infrared temperature sensor, comprising a lamp holder (1), a base (2), a light source, and an aperture (8), wherein the aperture ring around the outer edge of the aperture (8) is used to adjust the aperture size of the aperture (8), characterized in that, It also includes adjustment and measuring mechanisms: The lamp holder (1) has a hollow structure, and the light source is installed inside the top of the lamp holder (1); The bottom of the lamp holder (1) is connected to the base (2), and the bottom of the lamp holder (1) is provided with frosted glass (13), which is located above the base (2); The base (2) has a light outlet in the center, and the aperture (8) is installed at the light outlet. The adjustment mechanism includes an adjustment gear (9) disposed on the outer ring of the aperture (8) and a toggle gear (10) meshing with the adjustment gear (9). The adjustment gear (9) cooperates with the aperture ring on the outer ring of the aperture (8). The measuring mechanism includes a ball screw (11), a slider (12) and a laser distance measuring instrument (4). The ball screw (11) is coaxially connected to the actuating gear (10). The slider (12) is sleeved on the ball screw (11). The laser distance measuring instrument (4) is located above the slider (12).

2. The light source device for measuring the diameter of the infrared temperature sensor spot as described in claim 1, characterized in that, The lamp holder (1) has a parabolic reflector (7) inside.

3. The light source device for measuring the diameter of the infrared temperature sensor spot as described in claim 2, characterized in that, The light source is a halogen tungsten lamp (6), and the filament of the halogen tungsten lamp (6) is located at the focal point of the parabolic reflector (7).

4. The light source device for measuring the diameter of the temperature measuring spot of an infrared temperature sensor as described in claim 1, characterized in that, The lamp holder (1) has a stepped structure at the bottom of its inner wall, and the frosted glass (13) is fixedly installed on the stepped structure with glue.

5. The light source device for measuring the diameter of the temperature measuring spot of an infrared temperature sensor as described in claim 1, characterized in that, There is a gap between the aperture (8) and the frosted glass (13).

6. The light source device for measuring the diameter of the infrared temperature sensor spot as described in claim 5, characterized in that, The distance between the aperture (8) and the frosted glass (13) is less than 1 cm.

7. The light source device for measuring the diameter of the temperature measuring spot of an infrared temperature sensor as described in claim 1, characterized in that, The lamp holder (1) has multiple ventilation holes on its top.

8. The light source device for measuring the diameter of the infrared temperature sensor spot as described in claim 7, characterized in that, A cooling fan (5) is provided on the top of the lamp holder (1).

9. The light source device for measuring the diameter of the temperature measuring spot of an infrared temperature sensor as described in claim 8, characterized in that, It also includes a constant voltage and constant current source, which is electrically connected to the light source.

10. The light source device for measuring the diameter of the temperature measuring spot of an infrared temperature sensor as described in claim 1, characterized in that, It also includes a cover (3), which is located at the bottom of the base (2), and the cover (3) has an operating port on the side near the actuating gear (10).

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