Thermocouple laser power probe

Abstract

The utility model provides a thermocouple laser power probe. The thermocouple laser power probe comprises a probe shell, a thermocouple temperature sensor and a data acquisition and processing module, the upper surface of the probe shell is provided with a light absorption material layer used for absorbing laser power, the thermocouple temperature sensor is an annular panel, and the annular panel is provided with a plurality of galvanic couple sets distributed at equal intervals in the circumferential direction of the annular panel. Each thermocouple group comprises two connection points which are connected through a thermocouple along the radial direction of the annular panel, and the thermocouple temperature sensor is electrically connected with the data acquisition and processing module. The thermocouple laser power probe is simple in structure and small in size, can be installed in laser equipment, can collect data and display laser power in real time through a terminal, and is more beneficial to observation compared with a traditional manual detection method; and meanwhile, data acquisition can be used as a reference for the state of the laser equipment during production and maintenance, so that loss caused by abnormity of the laser equipment can be effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of laser power detection technology, specifically relating to a thermocouple laser power probe. Background Technology

[0002] In various technological fields, the demands for laser equipment functions are becoming increasingly diversified and intelligent, with laser output power being one of the most important parameters. Currently, in the application of laser equipment, whether in production, inspection, or maintenance, manual measurement of the laser power is required. This is especially true during mass production, where the laser power needs to be periodically monitored, which significantly consumes manpower and time. Utility Model Content

[0003] The purpose of this invention is to provide a thermocouple laser power probe that can at least solve some of the defects in the existing technology.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A thermocouple laser power probe includes a probe housing, a thermocouple temperature sensor disposed inside the probe housing, and a data acquisition and processing module connected to the probe housing. The upper surface of the probe housing has a light-absorbing material layer for absorbing laser power. The thermocouple temperature sensor is an annular panel. The annular panel has several groups of thermocouples evenly distributed along the circumference of the annular panel. Each group of thermocouples includes two connection points connected by a thermally conductive thermocouple along the radial direction of the annular panel. The thermocouple temperature sensor is electrically connected to the data acquisition and processing module.

[0006] Furthermore, the upper surface of the probe housing has a circular groove, and the light-absorbing material layer is located on the surface of the circular groove.

[0007] Furthermore, the lower surface of the probe housing is a heat dissipation cover.

[0008] Furthermore, the probe housing is coated with thermally conductive silicone grease.

[0009] Furthermore, the thermocouple temperature sensor is arranged parallel to the upper surface of the probe housing.

[0010] Furthermore, the annular panel is provided with several heat dissipation holes.

[0011] Furthermore, the data acquisition and processing module includes a microcontroller, an analog-to-digital converter chip, and a communication chip. The analog-to-digital converter chip receives the signal transmitted by the thermocouple temperature sensor and converts it into a digital signal, which is then output to the microcontroller for acquisition and storage. The microcontroller transmits the acquired digital signal to an external control system through the communication chip.

[0012] Furthermore, a fixing pad for assembling with external equipment is connected to the outer surface of the probe housing.

[0013] Furthermore, an elliptical through hole is provided on the connection surface between the fixing pad and the probe housing, and the probe housing is slidably connected to the elliptical through hole of the fixing pad by a slider.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] (1) The thermocouple laser power probe provided by this utility model is based on the principle of thermoelectric effect. As the laser irradiates, the temperature gradient on the probe surface diffuses, electrons diffuse, and a potential difference is generated. The potential difference is then converted into a digital signal by the data acquisition and processing module for output. It has a fast response speed, high power detection sensitivity, and good stability and consistency.

[0016] (2) The thermocouple laser power probe provided by this utility model has a simple structure and small size. It can be installed inside the laser equipment. Data can be collected and laser power can be displayed in real time through the terminal. It is easier to observe than the traditional method of manual detection. At the same time, the data can be used as a reference for the status of the laser equipment during production and maintenance, which can effectively avoid losses caused by abnormalities in the laser equipment.

[0017] The present invention will be further described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the thermocouple laser power probe of this utility model;

[0019] Figure 2 This is a schematic diagram of the probe housing in the thermocouple laser power probe of this utility model;

[0020] Figure 3 This is a schematic diagram of the thermocouple temperature sensor in the thermocouple laser power probe of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the fixing pad in the thermocouple laser power probe of this utility model.

[0022] Explanation of reference numerals in the attached diagram: 1. Probe housing; 2. Data acquisition and processing module; 3. Fixing pad; 4. Thermocouple temperature sensor; 11. Circular groove; 12. Heat dissipation base cover; 31. Elliptical through hole; 41. Connection point; 42. Thermocouple; 43. Heat dissipation hole. 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] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, abutting connections, or integral connections. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" or "several" means two or more.

[0027] like Figures 1 to 4As shown, this embodiment provides a thermocouple laser power probe, including a probe housing 1, a thermocouple temperature sensor 4, and a data acquisition and processing module 2. The upper surface of the probe housing 1 serves as the laser irradiation surface and has a light-absorbing material layer to absorb laser power. Laser irradiation on the upper surface of the probe housing 1 generates a temperature gradient diffusion, resulting in electron diffusion. The thermocouple temperature sensor 4 is disposed inside the probe housing 1, preferably arranged parallel to the upper surface of the probe housing 1. The thermocouple temperature sensor 4 utilizes the thermoelectric effect principle and is designed as a circular panel. The material can be, but is not limited to, copper. The choice of structural shape and material facilitates the conduction of temperature gradients. Several groups of thermocouples are evenly distributed along the circumference of the annular panel of the thermocouple temperature sensor 4. Each group of thermocouples includes two connection points 41 connected radially along the annular panel via a thermally conductive thermocouple 42, used to transmit the potential difference (i.e., voltage) formed by the temperature gradient. The data acquisition and processing module 2 is connected to the probe housing 1. The thermocouple temperature sensor 4 is electrically connected to the data acquisition and processing module 2. The voltage signal formed on the thermocouple temperature sensor 4 is transmitted to the data acquisition and processing module 2, converted into a digital signal output, and after data processing by the external control system, converted into a power display.

[0028] Preferred, such as Figure 2 As shown, the upper surface of the probe housing 1 is designed with a circular groove 11, and the light-absorbing material layer is located on the surface of the circular groove 11; at the same time, the lower surface of the probe housing 1 is designed with a heat dissipation bottom cover 12 made of a heat dissipation material, which can be, but is not limited to, aluminum. The lower surface of the probe housing 1 serves as the back of the laser irradiation. Using heat dissipation material can accelerate the heat dissipation of the probe and ensure the stability of the internal temperature of the probe space.

[0029] Optionally, the probe housing 1 described in this embodiment adopts an overall design similar to a rectangle, but it can also be designed into different structural forms according to actual needs.

[0030] Optimized, the thermocouple temperature sensor 4 is installed inside the probe housing 1 for rapid heat dissipation, such as... Figure 3 As shown, the annular panel (i.e., the thermocouple temperature sensor 4) is provided with a number of heat dissipation holes 43, which allows the temperature gradient to be formed quickly and improves the response speed of the thermocouple temperature sensor 4; the thermocouple temperature sensor 4 with this structure in this embodiment can achieve a response speed of 1 second.

[0031] Furthermore, thermally conductive silicone grease is applied to the internal space of the probe housing 1 to further ensure the diffusion of temperature within the thermocouple laser power probe.

[0032] In one specific implementation, the data acquisition and processing module 2 includes a microcontroller, an analog-to-digital converter (ADC), and a communication chip. The ADC receives the signal transmitted by the thermocouple temperature sensor 4 and converts it into a digital signal, which is then output to the microcontroller for acquisition and storage. The microcontroller transmits the acquired digital signal to an external control system via the communication chip. Specifically, in this embodiment, the microcontroller used is an STM32F10 series microcontroller, a single-clock / machine-cycle (1T) microcontroller with advantages such as wide voltage range, high speed, high reliability, low power consumption, strong anti-static properties, and strong anti-interference capabilities. This microcontroller provides rich digital and analog peripheral interfaces to meet data storage and transmission requirements. The ADC used is the AD5328, a low-power, low-noise, complete analog front-end for high-precision measurement applications. It has a built-in low-noise 12-bit Σ-Δ ADC with three differential analog inputs, which can acquire the voltage of the thermocouple temperature sensor and convert it into a digital signal for output. The communication chip is an RS-485 communication chip.

[0033] As one implementation method, such as Figure 1 and Figure 4 As shown, a fixing pad 3 for assembly with external equipment is also connected to the outer surface of the probe housing 1. Specifically, an elliptical through hole 31 is provided on the connection surface between the fixing pad 3 and the probe housing 1, serving as a fixing hole for fixing the fixing pad 3 and the probe housing 1. In this embodiment, the fixing pad 3 is designed with two elliptical through holes 31. The probe housing 1 is slidably connected to the elliptical through holes 31 of the fixing pad 3 via a slider. The probe housing 1 can slide in a fixed position to adjust the laser irradiation position. Furthermore, the fixing pad 3 can be fixed at different positions on the four corners of the probe housing 1, allowing for flexible fixing according to the size and shape of the space inside the laser equipment.

[0034] Experimental testing showed that the thermocouple laser power probe of this embodiment has high power detection sensitivity, reaching 1.5 milliwatts, good power detection consistency (less than 3% difference), and good power detection stability. At room temperature without laser irradiation, the numerical feedback jitter range is close to 0.01%. Under laser irradiation, the power jitter range is less than 0.04%.

[0035] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. A thermocouple laser power probe, characterized in that: The device includes a probe housing, a thermocouple temperature sensor disposed inside the probe housing, and a data acquisition and processing module connected to the probe housing. The upper surface of the probe housing has a light-absorbing material layer for absorbing laser power. The thermocouple temperature sensor is a circular panel with several groups of thermocouples evenly spaced along the circumference of the circular panel. Each group of thermocouples includes two connection points connected by a thermally conductive thermocouple along the radial direction of the circular panel. The thermocouple temperature sensor is electrically connected to the data acquisition and processing module.

2. The thermocouple laser power probe as described in claim 1, characterized in that: The upper surface of the probe housing has a circular groove, and the light-absorbing material layer is located on the surface of the circular groove.

3. The thermocouple laser power probe as described in claim 1, characterized in that: The lower surface of the probe housing is a heat dissipation cover.

4. The thermocouple laser power probe as described in claim 1, characterized in that: The probe housing is coated with thermally conductive silicone grease.

5. The thermocouple laser power probe as described in claim 1, characterized in that: The thermocouple temperature sensor is arranged parallel to the upper surface of the probe housing.

6. The thermocouple laser power probe as described in claim 1, characterized in that: The annular panel has several heat dissipation holes.

7. The thermocouple laser power probe as described in claim 1, characterized in that: The data acquisition and processing module includes a microcontroller, an analog-to-digital converter chip, and a communication chip. The analog-to-digital converter chip receives the signal transmitted by the thermocouple temperature sensor and converts it into a digital signal, which is then output to the microcontroller for acquisition and storage. The microcontroller transmits the acquired digital signal to an external control system through the communication chip.

8. The thermocouple laser power probe as described in claim 1, characterized in that: The outer surface of the probe housing is connected to a fixing pad for assembly with external equipment.

9. The thermocouple laser power probe as described in claim 8, characterized in that: The fixing pad and the probe housing have an elliptical through hole on their connecting surfaces. The probe housing is slidably connected to the fixing pad within the elliptical through hole via a slider.

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