Scanning device for measuring temperature of tiny target

Abstract

The utility model discloses a scanning device for measuring the temperature of a tiny target, which relates to the technical field of temperature measurement and comprises a measuring mechanism, an adjusting mechanism for adjusting the measuring direction of the measuring mechanism, a deformation mechanism connected with the adjusting mechanism and a control module electrically connected with the deformation mechanism. The deformation mechanism is used for driving the adjusting mechanism to move in a deformation mode, the measuring mechanism, the deformation mechanism and the adjusting mechanism are respectively connected in the shell, the deformation mechanism comprises a plurality of groups of piezoelectric ceramics electrically connected with the control module and a sheet connected with the plurality of groups of piezoelectric ceramics, and the sheet is connected to the inner wall of the shell and is connected with the adjusting mechanism. According to the scanning device for measuring the temperature of the tiny target, the voltage signal can be adjusted, the measuring position can be changed after the voltage signal is changed, so that the scanning function is realized, compared with manual adjustment, the adjustment precision is improved, and the measurement of the tiny target is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of temperature measurement technology, specifically to a scanning device for measuring the temperature of a tiny target. Background Technology

[0002] Infrared thermometers need to be aimed at the target to make relatively accurate measurements. To determine whether the infrared thermometer has been aimed at the desired temperature location, laser aiming is usually used. The location illuminated by the laser is the measurement position of the infrared thermometer. Therefore, staff can observe the laser's illumination position to determine whether the infrared thermometer has been aimed at the object to be measured. For more precise aiming, dual-laser or coaxial laser aiming methods are required. More advanced products also use video aiming, but this aiming method is complex and very expensive.

[0003] Currently, infrared thermometers are used more and more widely in temperature measurement applications, with increasingly higher requirements. There is a growing need to measure the temperature of minute targets, such as solder wire, whose outer diameter is typically only 0.5mm. Traditional infrared thermometers, using dual-laser aiming or more advanced video aiming methods, primarily rely on manual adjustment to align the thermometer with the target. This is achieved by using the laser or video aiming point of the infrared thermometer. However, in practical applications, manual adjustment makes it difficult to aim at and capture a 0.5mm target, resulting in significant errors. Therefore, relying on manual adjustment can easily lead to inaccurate measurement positions, resulting in inaccurate temperature control of the object and compromising product quality. Thus, a scanning device with higher adjustment precision is needed for measuring the temperature of minute targets. This invention addresses this technical problem. Utility Model Content

[0004] This invention provides a scanning device for measuring the temperature of tiny targets. It can adjust the aiming position of the laser by changing the voltage signal, thereby improving the adjustment accuracy compared with manual adjustment and helping to measure the temperature of tiny targets.

[0005] A scanning device for measuring the temperature of a tiny target includes a measuring mechanism, an adjusting mechanism for adjusting the measuring direction of the measuring mechanism, a deformation mechanism connected to the adjusting mechanism, and a control module electrically connected to the deformation mechanism. The deformation mechanism is used to drive the adjusting mechanism to move by deformation. The measuring mechanism, the deformation mechanism, and the adjusting mechanism are respectively connected inside a housing.

[0006] Furthermore, the deformation mechanism includes several sets of piezoelectric ceramics electrically connected to the control module, and thin sheets connected to several sets of piezoelectric ceramics. The thin sheets are connected to the inner wall of the housing and connected to the adjustment mechanism.

[0007] Furthermore, the adjustment mechanism includes a connecting piece connected to the thin sheet and a reflector connected to the connecting piece, the reflector being used to change the direction of light illumination from the measuring mechanism.

[0008] Furthermore, the measuring mechanism employs an infrared thermometer.

[0009] Furthermore, the outer casing is provided with a through hole for measuring the object.

[0010] Furthermore, the control module includes a digital-to-analog converter electrically connected to a plurality of the piezoelectric ceramics.

[0011] Furthermore, the connecting piece is curved and fits into the thin sheet and the reflector.

[0012] Furthermore, the outer casing is connected to the mounting base.

[0013] One or more technical solutions proposed in this application have at least the following technical effects:

[0014] (1) This scheme controls the deformation mechanism through the control module, causing it to deform, thereby driving the adjustment module to move. The adjustment module after the movement will adjust the measurement position of the measuring mechanism, so that the measurement position of the measuring mechanism does not need to be adjusted manually. Instead, it is adjusted by the deformation of the deformation mechanism itself, which improves the adjustment accuracy and makes it easy for this device to measure the temperature of small targets.

[0015] (2) The deformation mechanism in this scheme includes a thin sheet and several sets of piezoelectric ceramics. Applying voltage to the piezoelectric ceramics will cause mechanical stress to be generated in the piezoelectric ceramics, which will cause the piezoelectric ceramics to undergo slight deformation. The deformation of multiple sets of piezoelectric ceramics will drive the thin sheet to deform, thereby causing the thin sheet to drive the connecting piece to move slightly, which is convenient for aiming at small targets and improves the adjustment accuracy.

[0016] (3) When it is necessary to adjust the aiming position, you can input a number and the digital-to-analog converter will output the corresponding voltage value, causing the piezoelectric ceramic to deform. Therefore, there is no need to manually adjust the infrared thermometer itself. You only need to input a number to adjust it automatically. This improves the adjustment accuracy and saves time and effort, thus improving its practicality.

[0017] (4) This scheme is equipped with multiple sets of piezoelectric ceramics. By applying voltage to different positions and different numbers of piezoelectric ceramics, the piezoelectric ceramics can drive the reflector to tilt in different directions through the thin sheet, so that the field of view of the infrared thermometer can sweep across a small area, thereby realizing the function of continuous scanning in a small range through the above method. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the control module in this utility model.

[0020] Figure 3 This is a schematic diagram of a traditional coaxial laser aiming method;

[0021] Figure 4 This is a schematic diagram of a traditional dual-laser aiming method.

[0022] Legend: 1. Infrared thermometer; 2. Thin sheet; 3. Connecting piece; 4. Mounting base; 5. Reflector; 6. Housing; 7. Piezoelectric ceramic; 8. Control module. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 scope of protection of the present utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] See Figures 1-2 This utility model proposes a scanning device for measuring the temperature of a tiny target, including a measuring mechanism, an adjustment mechanism for adjusting the measuring direction of the measuring mechanism, a deformation mechanism connected to the adjustment mechanism, and a control module 8 electrically connected to the deformation mechanism. The deformation mechanism is used to drive the adjustment mechanism to move by deformation. The measuring mechanism, deformation mechanism, and adjustment mechanism are respectively connected inside the outer shell 6.

[0027] Furthermore, the deformation mechanism includes several sets of piezoelectric ceramics 7 electrically connected to the control module 8, and a thin sheet 2 connected to the several sets of piezoelectric ceramics 7. The thin sheet 2 is connected to the inner wall of the outer casing 6 and is connected to the adjustment mechanism. In this embodiment, four sets of piezoelectric ceramics 7 are provided, and the four sets of piezoelectric ceramics 7 are connected together on the thin sheet 2, similar to four quadrants. The thin sheet 2 is made of stainless steel and is connected to the inner wall of the outer casing 6 by welding.

[0028] Furthermore, the adjustment mechanism includes a connecting piece 3 connected to the thin sheet 2 and a reflector 5 connected to the connecting piece 3. The reflector 5 is used to change the direction of the measuring mechanism.

[0029] Furthermore, the measuring mechanism employs an infrared thermometer 1, which in this embodiment is also connected inside the outer casing 6. Figure 1 The outer shell 6 in this embodiment is only a part of the outer shell 6 in this solution, and the specific shape of the outer shell 6 is not limited in this solution.

[0030] Furthermore, the outer casing 6 has a through hole for measuring the object. In this embodiment, the through hole is located at the bottom of the outer casing 6 to facilitate the infrared thermometer 1 in measuring the temperature of the object. The working principle of the infrared thermometer 1 is common knowledge in the art and will not be described in detail here.

[0031] Furthermore, the control module 8 includes a digital-to-analog converter electrically connected to several groups of piezoelectric ceramics 7. In this embodiment, the digital-to-analog converter is connected to its corresponding resistors R1-R12 for current limiting, voltage division, etc. The corresponding digital-to-analog conversion circuit is as follows: Figure 2 As shown. The function of a digital-to-analog converter (DAC) is to convert digital signals into analog signals. It can generate corresponding analog signal outputs from input digital data through a specific conversion method. The principle of DAC and DAC circuit are existing technologies known to those skilled in the art and will not be described in detail here. This embodiment uses four 6-bit DACs, corresponding to four control loops, so that each piezoelectric ceramic can be controlled individually. The linearity of the deflection angle of the reflector 5 is proportional to the strain coefficient, geometric dimensions, and applied voltage of the piezoelectric ceramic 7.

[0032] Furthermore, the connecting piece 3 is curved and adheres to the sheet 2 and the reflector 5. In this embodiment, the top of the connecting piece 3 is connected to the sheet 2 by welding, and the bottom is connected to the reflector 5 by adhesive bonding.

[0033] Furthermore, the outer casing 6 is connected to the mounting base 4. The mounting base 4 is used to fix the outer casing 6 and prevent the outer casing 6 from shaking. In this embodiment, the mounting base 4 has an L-shaped cross-section, which is a structure known to those skilled in the art. Based on this, other shapes of mounting base 4 can also be used. Therefore, the specific structure of the mounting base 4 is not limited here.

[0034] The working process of this utility model is as follows:

[0035] When the infrared thermometer 1 is activated, the laser emitted by the infrared thermometer 1 will illuminate the reflector 5. The light reflected by the reflector 5 will exit through the through hole. When the laser aiming position is not aligned with the solder wire, it is necessary to input digital data to the DAC via PC software or manually. The DAC will then output a voltage corresponding to the digital data. When the piezoelectric ceramic 7 is subjected to voltage, it will generate mechanical stress under the action of the inverse piezoelectric effect, causing it to deform. This will cause the thin sheet 2 to deform, and the connecting piece 3 connected to the thin sheet 2 will cause the reflector 5 to move (tilt), thereby changing the laser aiming position. Furthermore, since different digital inputs will output different voltages, the piezoelectric ceramic 7 can be made to produce different deformations in this way, allowing the laser to be aimed at different positions. Because the deformation degree of the piezoelectric ceramic 7 is very small, this device is suitable for measuring small targets.

[0036] See Figure 3 , Figure 4 These represent the aiming methods of coaxial lasers and dual-laser aiming, respectively. The optical path of the laser aiming and the size of the measured micro-target are shown in the figure. Figure 3 and Figure 4As shown, compared with this solution, the traditional method is difficult to make small and precise adjustments to the aiming position.

[0037] It should be noted that the laser emitted by the infrared thermometer 1 is only for aiming purposes, so that the staff can know the specific location that the infrared thermometer 1 is currently measuring. Even without the laser, the infrared thermometer 1 can still perform temperature measurement, and this device can still perform scanning work on small targets.

[0038] Regarding the control of the piezoelectric ceramic 7, the following methods can be used as a reference:

[0039] In this embodiment, the four sets of piezoelectric ceramics 7 are arranged in a four-quadrant layout. Applying voltages of opposite polarities to the piezoelectric ceramics 7 in opposite quadrants causes local bending deformation of the piezoelectric ceramics 7 through the piezoelectric effect, which in turn causes the thin sheet 2 to undergo slight deformation, thereby changing the angle of the reflector 5 and thus changing the direction of reflection of the incident light. This allows the reflector to tilt along the trajectory of the X-axis or Y-axis, changing the measurement position.

[0040] By simultaneously adjusting the voltage of the piezoelectric ceramics 7 in all four quadrants, the reflector 5 can be tilted in any direction according to the specific voltage value. During the tilting process, the field of view of the infrared thermometer 1 will change, thereby realizing automated continuous scanning.

[0041] Depending on actual needs, a specified voltage value can also be input to tilt the reflector 5 at a specific angle;

[0042] Through the above methods, this solution enables high-precision temperature measurement and scanning without complex mechanical linkage devices. Furthermore, the device is compact, has a fast response speed, and is suitable for integrated optical system applications. Preferably, in this embodiment, temperature measurement of minute objects can be performed through scanning and by employing peak hold.

[0043] For example, since the temperature may vary at different locations within a tiny object, and these objects are easily affected by external influences, causing slight changes in position, when it is necessary to determine the maximum temperature of a tiny object, this device can adjust and control the field of view of the infrared thermometer 1 to sweep across a small area. This allows the temperature of the tiny object within the scanned area to be determined, and the maximum temperature value to be obtained. Therefore, temperature measurement of tiny targets can be performed by scanning, eliminating the need to scan according to the shape of the tiny object, and instead allowing for a comprehensive scan of the area containing the tiny object, thus optimizing the scanning method. The principle of peak hold is common knowledge in this field and will not be elaborated upon here.

[0044] The technical features not described in detail in this solution are based on the conventional operation and general understanding of those skilled in the art and are derived from existing technologies, and will not be elaborated further here.

[0045] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A scanning device for measuring the temperature of a tiny target, characterized in that, It includes a measuring mechanism, an adjustment mechanism for adjusting the measuring direction of the measuring mechanism, a deformation mechanism connected to the adjustment mechanism, and a control module (8) electrically connected to the deformation mechanism. The deformation mechanism is used to drive the adjustment mechanism to move by deformation. The measuring mechanism, the deformation mechanism, and the adjustment mechanism are respectively connected inside the outer shell (6).

2. The scanning device for measuring the temperature of a tiny target according to claim 1, characterized in that, The deformation mechanism includes several sets of piezoelectric ceramics (7) electrically connected to the control module (8) and a thin sheet (2) connected to several sets of piezoelectric ceramics (7). The thin sheet (2) is connected to the inner wall of the outer shell (6) and is connected to the adjustment mechanism.

3. The scanning device for measuring the temperature of a tiny target according to claim 2, characterized in that, The adjustment mechanism includes a connecting piece (3) connected to the thin sheet (2) and a reflector (5) connected to the connecting piece (3). The reflector (5) is used to change the direction of light irradiation of the measuring mechanism.

4. The scanning device for measuring the temperature of a tiny target according to claim 1, characterized in that, The measuring mechanism uses an infrared thermometer (1).

5. The scanning device for measuring the temperature of a tiny target according to claim 1, characterized in that, The outer shell (6) has a through hole for measuring the object.

6. The scanning device for measuring the temperature of a tiny target according to claim 2, characterized in that, The control module (8) includes a digital-to-analog converter electrically connected to a plurality of the piezoelectric ceramics (7).

7. The scanning device for measuring the temperature of a tiny target according to claim 3, characterized in that, The connecting piece (3) is curved and fits into the thin sheet (2) and the reflector (5).

8. The scanning device for measuring the temperature of a tiny target according to claim 1, characterized in that, The outer shell (6) is connected to the mounting base (4).

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