Multi-wavelength temperature measuring device and system

Abstract

The invention relates to the technical field of temperature measuring equipment, and provides a multi-wavelength temperature measuring device and system, the temperature measuring device comprises a plurality of measuring units, and each measuring unit comprises a light receiving module comprising a first optical fiber and a light condensing unit coupled to one end of the first optical fiber; an inlet of the light splitting module is connected with the other end of the first optical fiber, and the light splitting module is used for splitting the optical radiation and outputting an optical signal with a specific wavelength; an inlet of the photoelectric detector is connected with an outlet of the light splitting module through a second optical fiber, and the photoelectric detector is used for converting optical signals output by the light splitting module into electric signals and outputting the electric signals. Through the arrangement, the light condensing unit can efficiently converge and collect light radiation of a target substance, the first optical fiber and the second optical fiber can efficiently transmit light rays, the light radiation collecting and transmitting efficiency is greatly improved, a light path composed of various optical lenses does not exist in the whole device, the complex and tedious light path adjusting step is omitted, and the light radiation collecting and transmitting efficiency is improved. And the convenience of practical application is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature measurement equipment, and in particular to a multi-wavelength temperature measurement device and system. Background Art

[0002] The multi-channel color thermometer measures the radiation wave emission from the surface of an object through a non-contact method, obtains the light radiation intensity of the object at different wavelengths under specific conditions, combines various models of spectral emissivity, and calculates the temperature distribution on the target object's surface based on Planck's blackbody radiation. This thermometer has important application value in research on plasma physics, astrophysics, geophysics, inertial confinement fusion, etc.

[0003] Existing multi-wavelength pyrometers usually use various optical lenses to introduce the measured light source into the filter, use the reflection and transmission of the filter to split a beam of light multiple times, and then use optical lenses to introduce it into a photodetector. The photodetector performs photoelectric conversion and outputs an electrical signal to an oscilloscope, thereby obtaining an image of the temperature evolution over time.

[0004] However, the above-mentioned related technologies have defects such as low light collection efficiency, complex light path adjustment and inconvenient operation. Summary of the invention

[0005] The present invention provides a multi-wavelength temperature measurement device and system, which are used to solve the defects of low light collection efficiency, complicated and cumbersome light path adjustment and inconvenient operation of multi-wavelength thermometers in the prior art. The light collection efficiency can be improved, and there is no need for complicated and cumbersome light path adjustment, and the operation is simple.

[0006] The present invention provides a multi-wavelength temperature measurement device, comprising: a plurality of measurement units, each of the measurement units comprising: A light collecting module, comprising a first optical fiber and a light focusing unit coupled to one end of the first optical fiber, the light focusing unit being used to collect light radiation of a target substance and focus the light radiation onto the first optical fiber; A light splitting module, the entrance of which is connected to the other end of the first optical fiber, and is used to perform light splitting processing on the optical radiation, thereby outputting an optical signal with a specific wavelength; The photoelectric detector has an inlet connected to the outlet of the light splitting module through a second optical fiber, and is used to convert the optical signal output by the light splitting module into an electrical signal and output it.

[0007] According to a multi-wavelength temperature measurement device provided by the present invention, the focusing unit includes a plano-convex lens and a bi-convex lens.

[0008] According to a multi-wavelength temperature measurement device provided by the present invention, the plurality of first optical fibers are divided into at least one optical fiber group, and the light receiving module further includes connection flanges corresponding to the number of the optical fiber groups; Each of the connecting flanges is provided with through holes corresponding to the number of the first optical fibers in the optical fiber group, and the first optical fibers are inserted into the through holes of the connecting flange and are sealed with the through holes.

[0009] According to a multi-wavelength temperature measurement device provided by the present invention, the light receiving module also includes an optical fiber bracket, the optical fiber bracket is provided with a plurality of through holes corresponding to the number of the first optical fibers, a plurality of the first optical fibers are inserted into the through holes of the optical fiber bracket, and the optical fiber bracket is arranged in plurality along the path of the first optical fiber.

[0010] A multi-wavelength temperature measurement device provided according to the present invention further includes a box and a support base arranged in the box; the spectroscopic modules and the photoelectric detectors of the plurality of measurement units are integrated and connected to the support base.

[0011] According to a multi-wavelength temperature measurement device provided by the present invention, the support base is provided with at least two layers, the spectroscopic module and the photodetector of each measuring unit are arranged on the same layer of the support base, and the spectroscopic module on each layer is suitable for outputting optical signals within a set wavelength range.

[0012] According to a multi-wavelength temperature measurement device provided by the present invention, the support base is provided with a first layer and a second layer, the multiple spectroscopic modules arranged on the first layer are used to output optical signals in the infrared light wavelength range, and the multiple spectroscopic modules arranged on the second layer are used to output optical signals in the visible light wavelength range.

[0013] According to a multi-wavelength temperature measurement device provided by the present invention, the photoelectric detector includes a Si detector and an InGaAs detector; The Si detector is used for detecting the visible light part, and the InGaAs detector is used for detecting the infrared light part.

[0014] According to a multi-wavelength temperature measurement device provided by the present invention, the light receiving module further includes an optical bracket for locating the position of the light focusing unit.

[0015] According to a multi-wavelength temperature measuring device provided by the present invention, the middle position of each layer of the support seat is hollowed out for allowing the cable to pass through.

[0016] According to a multi-wavelength temperature measurement device provided by the present invention, the spectroscopic module includes a filter mounting seat and a filter; the filter is fixedly connected to the support seat through the filter mounting seat.

[0017] According to a multi-wavelength temperature measurement device provided by the present invention, a switching power supply is provided at the bottom of each layer of the support base for supplying power to the photoelectric detectors of each layer respectively.

[0018] The present invention also provides a multi-wavelength temperature measurement system, comprising an oscilloscope and any of the multi-wavelength temperature measurement devices described above, wherein the oscilloscope is provided with a plurality of measurement channels for receiving electrical signals output by a plurality of photodetectors.

[0019] The multi-wavelength temperature measurement device and system provided by the present invention, when measuring the temperature of the target material, the focusing unit can efficiently collect the light radiation of the target material and converge the light radiation to the first optical fiber, the first optical fiber can transmit the light radiation converged by the focusing unit to the spectroscopic module, the light radiation is split by the spectroscopic module to obtain a light signal with a specific wavelength, the second optical fiber can transmit the light signal output by the spectroscopic module to the photodetector, the light signal is converted into an electrical signal output by the photodetector, and after the oscilloscope and other data acquisition devices obtain the electrical signal output by the photodetector, the image of the evolution of the light radiation intensity at each wavelength over time is obtained, that is, the image of the evolution of the temperature over time. Compared with the related art, the focusing unit can efficiently converge and collect the light radiation of the target material, the first optical fiber can directly introduce the light radiation collected by the focusing unit into the spectroscopic module, and the second optical fiber can directly introduce the light signal output by the spectroscopic module into the photodetector, which greatly improves the collection and transmission efficiency of the light radiation, and there is no light path composed of various optical lenses in the whole device, thereby eliminating the complex and cumbersome light path adjustment steps, and improving the convenience in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the integrated connection between the spectroscopic module and the photoelectric detector and the support base in the multi-wavelength temperature measurement device provided by an embodiment of the present invention.

[0022] Figure 2 It is a structural schematic diagram of a light receiving module provided in an embodiment of the present invention.

[0023] Figure 3 It is a structural schematic diagram of a focusing unit provided in an embodiment of the present invention.

[0024] Figure 4It is a schematic structural diagram of a filter mounting base provided by an embodiment of the present invention.

[0025] Figure 5 It is a schematic diagram of the structure of a photoelectric detector provided by an embodiment of the present invention.

[0026] Figure 6 It is a schematic diagram of the structure of the second optical fiber provided in an embodiment of the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of a support base provided in an embodiment of the present invention.

[0028] Figure 8 It is a schematic diagram of the structure of a switching power supply provided by an embodiment of the present invention.

[0029] Fig. 9 It is a schematic structural diagram of an optical fiber bracket provided in an embodiment of the present invention.

[0030] Reference numerals: 1. Light receiving module; 10. First optical fiber; 100. First interface; 101. Second interface; 11. Focusing unit; 110. First connector; 12. Optical fiber bracket; 13. Connecting flange; 2. Splitting module; 20. Second optical fiber; 200. Third interface; 201. Fourth interface; 21. Filter mounting seat; 3. Photodetector; 30. Switching power supply; 4. Support seat; 40. First layer; 41. Second layer. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In order to facilitate the understanding of the multi-wavelength temperature measurement device and system provided by the present invention, its application background is first introduced. The multi-channel color thermometer can measure the radiation wave emission on the surface of an object in a non-contact manner, and then obtain the temperature distribution on the surface of the target object. It has important application value in the research of plasma physics, astrophysics, geophysics, inertial confinement fusion, etc.

[0033] Existing multi-wavelength pyrometers usually use various optical lenses to introduce the measured light source into the filter, use the reflection and transmission of the filter to split a beam of light multiple times, and then use optical lenses to introduce it into a photodetector. The photodetector performs photoelectric conversion and outputs an electrical signal to an oscilloscope, thereby obtaining an image of the temperature evolution over time.

[0034] However, in the above-mentioned related technologies, the light collection efficiency is low, and the light path adjustment involves multiple operations such as collimation and focusing. The light path adjustment is complicated and cumbersome, and the operation is not simple enough.

[0035] In view of the above problems, the present invention provides a multi-wavelength temperature measurement device and system, which can improve the light collection efficiency, do not require complex and cumbersome optical path adjustment, and are easy to operate.

[0036] Combine the following Figure 1-Figure 9 The multi-wavelength temperature measurement device and system of the present invention are described.

[0037] Reference Figures 1 to 3 A multi-wavelength temperature measurement device includes a plurality of measurement units, each of which includes a light receiving module 1, a light splitting module 2 and a photodetector 3; wherein the light receiving module 1 includes a first optical fiber 10 and a light focusing unit 11 coupled to one end of the first optical fiber 10, the light focusing unit 11 is used to collect light radiation of a target substance and converge the light radiation to the first optical fiber 10; the entrance of the light splitting module 2 is connected to the other end of the first optical fiber 10 relative to the light focusing unit 11, the first optical fiber 10 can transmit the light radiation collected by the light focusing unit 11 to the light splitting module 2, the light splitting module 2 can perform light splitting processing on the light radiation, thereby outputting a light signal with a specific wavelength; the entrance of the photodetector 3 is connected to the exit of the light splitting module 2 through a second optical fiber 20, the light signal with a specific wavelength output by the light splitting module 2 is transmitted to the photodetector 3 through the second optical fiber 20, the photodetector 3 is used to convert the light signal into an electrical signal and output it.

[0038] In a specific application scenario, when measuring the temperature of the target material, the focusing unit 11 can efficiently collect the light radiation of the target material and focus the light radiation to the first optical fiber 10. The first optical fiber 10 can transmit the light radiation focused by the focusing unit 11 to the spectrometer module 2. After the light radiation is split by the spectrometer module 2, a light signal with a specific wavelength is obtained. The second optical fiber 20 can transmit the light signal output by the spectrometer module 2 to the photodetector 3. The light signal is converted into an electrical signal by the photodetector 3 and output. After the data acquisition device such as an oscilloscope obtains the electrical signal output by the photodetector 3, an image of the evolution of the light radiation intensity with time at each wavelength is finally obtained, that is, an image of the evolution of the temperature with time. Compared with related technologies, the focusing unit 11 can efficiently focus and collect the light radiation of the target material, the first optical fiber 10 can directly introduce the light radiation collected by the focusing unit 11 into the spectroscopic module 2, and the second optical fiber 20 can directly introduce the optical signal output by the spectroscopic module 2 into the photodetector 3, which greatly improves the collection and transmission efficiency of light radiation. In addition, there is no optical path composed of various optical lenses in the whole device, thereby eliminating the complicated and cumbersome optical path adjustment steps and improving the convenience in practical applications.

[0039] Generally speaking, when measuring the temperature of a target material, multiple optical signals of specific wavelengths are selected from a preset wavelength spectrum range for monitoring. Each measuring unit in the multi-wavelength temperature measurement device is used to monitor an optical signal at one wavelength. Therefore, the specific number of measuring units can be configured according to the number of optical signals to be monitored. For example, when it is necessary to monitor optical signals at eight wavelengths, eight groups of measuring units are equipped, and the specific number of selected optical signals and wavelengths can be configured according to actual needs.

[0040] In this embodiment, in order to ensure the measurement accuracy, the optical signal to be monitored is selected from multiple wavelengths in the visible to infrared band. Specifically, eight wavelengths of optical signals are selected in the visible to infrared band, of which four are selected from the visible light band and four are selected from the infrared band. Corresponding to the number of optical signals, eight groups of measurement units are provided in the multi-wavelength temperature measurement device.

[0041] The light receiving module 1 is a part of the measuring unit used to collect and transmit the light radiation of the target material, wherein the light collection is mainly realized by the focusing unit 11, and the focusing unit 11 can focus the light radiation of the target material. In one embodiment of the present invention, the focusing unit 11 can use a plano-convex lens or a biconvex lens, both of which have the ability to focus light. The specific one can be selected according to actual needs, and the curvature of the plano-convex lens or the biconvex lens can be configured according to actual needs, and no specific restrictions are made in the embodiments of the present invention. The energy density of the light radiation from the target material is significantly improved after being focused by the plano-convex lens or the biconvex lens.

[0042] The first optical fiber 10 is used to transmit the light focused by the focusing unit 11. Its material, length, core diameter and other specifications can be selected according to actual experimental requirements. In this embodiment, the first optical fiber 10 is made of quartz optical fiber with a length of 11.5m, a core diameter of 1.5mm, and an operating wavelength of 350-2200nm.

[0043] One end of the first optical fiber 10 is the incident end, and the other end is the output end. The focusing unit 11 is connected to the incident end of the first optical fiber 10. The light focused by the focusing unit 11 is incident on the end face of the first optical fiber 10 at a certain incident angle, thereby realizing the transmission of light in the first optical fiber 10.

[0044] The incident end of the first optical fiber 10 is connected to the first interface 100, and the end of the light focusing unit 11 is connected to the first connector 110. The first interface 100 and the first connector 110 are detachably connected. The first optical fiber 10 and the light focusing unit 11 can be conveniently connected through the first interface 100 and the first connector 110 that cooperate with each other. Specifically, the first interface 100 is an FC / PC interface, the first connector 110 is a threaded connector, and the first interface 100 and the first connector 110 are threadedly matched.

[0045] The output end of the first optical fiber 10 is connected to the light splitting module 2, which is mainly used to perform light splitting processing on the light radiation collected by the light receiving module 1 to obtain an optical signal with a specific wavelength. Figures 1 to 4 The spectrometer module 2 includes a filter mounting seat 21 and a filter; wherein the filter mounting seat 21 can be a commercially available coaxial filter mounting seat, for example, a model FOFMF / M, and the filter mounting seat 21 is equipped with an off-axis parabolic mirror for converging and collimating light, which can converge and collimate the light transmitted by the first optical fiber 10 and then transmit it to the filter. The specific structure and working principle of the filter mounting seat 21 can refer to the prior art and will not be repeated in the embodiments of the present invention.

[0046] The working wavelength range of the filter mount 21 can be selected according to the actual experimental requirements. In this embodiment, the wavelength range of the filter mount 21 is 450 nm-20 μm. The filter is installed in the filter mount 21. Specifically, the filter can be a commercially available narrow-band filter. It can be understood that since different measurement units need to monitor light signals of different wavelengths, the center wavelengths of the filters in different measurement units will also be different, and can be specifically configured according to the actual experimental requirements.

[0047] For convenient connection, the output end of the first optical fiber 10 is connected with a second interface 101, the entrance of the filter mounting seat 21 is connected with a second connector, the second interface 101 and the second connector are detachably connected, and the second interface 101 and the second connector cooperate with each other to facilitate the connection between the first optical fiber 10 and the optical splitting module 2. Specifically, the second interface 101 is an FC / PC interface, the second connector is a threaded connector, and the second interface 101 and the second connector are threadedly matched.

[0048] Reference Figure 5 and Figure 6 , the optical radiation is transmitted to the filter mounting seat 21 through the first optical fiber 10, and an optical signal with a specific wavelength is generated after being split by the filter. The optical signal is output through the outlet of the filter mounting seat 21, and the outlet of the filter mounting seat 21 is connected to the photodetector 3 through the second optical fiber 20. The optical signal is transmitted to the photodetector 3 through the second optical fiber 20, and the photodetector 3 converts the optical signal into an electrical signal. The photodetector 3 uses a photodetector with a rising edge of hundreds of ps, which has a high measurement response and can detect instantaneous and fast optical signals. It can be used for rapid temperature diagnosis of high energy density materials generated by ion beams or laser beams.

[0049] In a specific embodiment of the present invention, since the optical signal to be measured covers the visible band and the infrared band, the photodetector 3 includes a Si detector and an InGaAs detector; wherein the Si detector is used for detecting the visible light part, and its rise time and fall time are both hundreds of ps, the frequency response range is 30kHz-1.2GHz, the photosensitive area is hundreds of μm, and the BNC connector; the InGaAs detector is used for detecting the infrared part of the light, and its rise and fall times are both hundreds of ps, the frequency response range is 30kHz-1.5GHz, the photosensitive area is hundreds of μm, and the BNC connector.

[0050] In order to facilitate connection, the second optical fiber 20 is provided with a third interface 200 and a fourth interface 201 at both ends, the outlet of the filter mounting seat 21 is connected with a third connector, the inlet of the photodetector 3 is connected with a fourth connector, the third interface 200 is detachably connected to the third connector, and the fourth interface 201 is detachably connected to the fourth connector. Specifically, the third interface 200 and the fourth interface 201 are both FC / PC interfaces, the third connector and the fourth connector are both threaded connectors, the third interface 200 is threadedly matched with the third connector, and the fourth interface 201 is threadedly matched with the fourth connector, so as to improve the convenience of connecting the second optical fiber 20 with the filter mounting seat 21 and the photodetector 3.

[0051] In one embodiment of the present invention, referring to Figure 1 and Figure 7 The multi-wavelength temperature measurement device also includes a box and a support base 4 arranged in the box; the light receiving module 1 and the light splitting module 2 of multiple measurement units are integrated and connected to the support base 4, so that the space occupied by the equipment can be reduced, and it is easy to move and has a wide range of applicability.

[0052] The side of the box is provided with a threading hole and a door that can be opened and closed, which is convenient for threading and operation. The support seat 4 is fixedly connected to the box. The specific material of the support seat 4 can be selected according to actual needs. For example, it can be made of metal or non-metallic materials. In this embodiment, in order to ensure the support strength, the support seat 4 is made of hard aluminum alloy. The filter mounting seat 21 and the photodetector 3 are fixedly connected to the support seat 4 by screws.

[0053] In one embodiment of the present invention, the support base 4 is provided with at least two layers, and the spectroscopic module 2 and the photodetector 3 of each measuring unit are provided on the same layer of the support base 4, and the spectroscopic module 2 on each layer is suitable for outputting optical signals within a set wavelength range. In this way, group monitoring of optical signals within different wavelength ranges is achieved.

[0054] Specifically, the support base 4 is provided with a first layer 40 and a second layer 41. The multiple spectroscopic modules 2 arranged on the first layer 40 are used to output optical signals within the infrared wavelength range, and accordingly, the multiple photodetectors 3 arranged on the first layer 40 are all InGaAs detectors. The multiple spectroscopic modules 2 arranged on the second layer 41 are used to output optical signals within the visible light wavelength range, and accordingly, the multiple photodetectors 3 arranged on the second layer 41 are all Si detectors.

[0055] Specifically, refer to Figure 7 and Figure 8 The middle part of the support base 4 is hollowed out for cables to pass through, so as to improve the convenience of wiring and operation. A switching power supply 30 is provided at the bottom of each layer of the support base 4, which is used to supply power to the photodetectors 3 of each layer respectively. The switching power supply 30 is a commonly used high-frequency power conversion device. Its specific structure and working principle can refer to the prior art, and will not be described in detail in the embodiments of the present invention.

[0056] Through the above technical solution, the light receiving modules 1, the light splitting modules 2 and the photoelectric detectors 3 of the multiple measuring units can be integrated and connected as a whole, which has the advantages of small size, easy movement and wide applicability.

[0057] In actual work, the focusing unit 11, as a component for collecting light radiation from the target material, is generally arranged in the target room or near the target material. In order to improve safety, the spectroscopic module 2 and the photodetector 3 are generally arranged away from the target room, which makes the first optical fiber 10 arranged very long. The longer first optical fiber 10 is easily damaged by external force. In addition, multiple first optical fibers 10 are closely arranged or cross-arranged, which is easy to cause cross-interference.

[0058] To solve the above problems, refer to Fig. 9 The light receiving module 1 also includes an optical fiber bracket 12, on which a plurality of through holes corresponding to the number of the first optical fibers 10 are provided. The first optical fibers 10 are inserted into the through holes of the optical fiber bracket 12, and a plurality of optical fiber brackets 12 are arranged along the extension path of the first optical fibers 10.

[0059] The optical fiber holder 12 can provide support for the first optical fiber 10, effectively avoiding the problem of the first optical fiber 10 being bent or damaged by external force, ensuring the straightness and integrity of the optical fiber. In addition, the optical fiber holder 12 can arrange multiple first optical fibers 10 in an orderly manner, avoiding cross-interference between multiple first optical fibers 10.

[0060] In actual work, sometimes the focusing unit 11 needs to be arranged in the target chamber to collect the light radiation of the target material. In order to facilitate the cooperation between the first optical fiber 10 and the cavity wall of the target chamber, refer to Figure 2, the multiple first optical fibers 10 are divided into at least one optical fiber group, the light receiving module 1 further includes a connecting flange 13 corresponding to the number of optical fiber groups, each connecting flange 13 is provided with a through hole corresponding to the number of first optical fibers 10 in the optical fiber group, and the first optical fiber 10 is passed through the through hole of the connecting flange 13. In practical applications, an opening for docking with the connecting flange 13 can be provided on the wall of the target chamber, and when collecting temperature, the multiple first optical fibers 10 are fixed to the wall of the target chamber through the connecting flange 13.

[0061] In this embodiment, there are eight first optical fibers 10 , which are divided into two optical fiber groups. There are two connecting flanges 13 , each of which has four through holes. The two optical fiber groups cooperate with the two connecting flanges 13 , respectively.

[0062] In some working scenarios, sometimes it is necessary to ensure the sealing environment of the target chamber when collecting the light radiation of the target material. For example, when measuring the temperature of the target material in the vacuum chamber, in order to ensure the sealing environment of the target chamber, the first optical fiber 10 is sealed with the through hole on the connecting flange 13. Specifically, a pin can be embedded outside the first optical fiber 10, and the inner wall of the pin is tightly wrapped with the outer wall of the first optical fiber 10 by a heat shrink tube or sealant to achieve sealing. A matching sleeve or a sealing ring groove is set in the through hole of the connecting flange 13, and the pin is inserted into the matching sleeve or the sealing ring groove and sealed by a sealing ring or a thread. Sealant can also be filled between the first optical fiber 10 and the inner wall of the through hole of the connecting flange 13 to achieve sealing.

[0063] It should be noted that there are many ways to seal the first optical fiber 10 and the through hole of the connecting flange 13, which will not be listed here one by one.

[0064] In one embodiment of the present invention, the light collecting module 1 further comprises an optical bracket for positioning the light focusing unit 11. In practical applications, the light focusing unit 11 can be positioned at a specific position close to the target material by the optical bracket to maximize the light collection efficiency.

[0065] The multi-wavelength temperature measurement system provided by the present invention is described below. The multi-wavelength temperature measurement system described below and the multi-wavelength temperature measurement device described above can be referred to each other.

[0066] A multi-wavelength temperature measurement system comprises an oscilloscope and the multi-wavelength temperature measurement device described in any one of the above embodiments. The oscilloscope is provided with a plurality of measurement channels for receiving electrical signals output by a plurality of photodetectors 3 .

[0067] Specifically, the oscilloscope uses an eight-channel digital oscilloscope, and the photodetector 3 is connected to the oscilloscope through a BNC line. The oscilloscope can simultaneously collect electrical signals corresponding to eight wavelengths and obtain an image of the evolution of light radiation intensity over time at each wavelength, that is, an image of the evolution of temperature over time can be obtained.

[0068] Through the multi-wavelength temperature measurement device and system provided by the embodiment of the present invention, the focusing unit 11 can efficiently converge and collect the light radiation of the target material, the first optical fiber 10 can directly introduce the light radiation collected by the focusing unit 11 into the spectroscopic module 2, and the second optical fiber 20 can directly introduce the optical signal output by the spectroscopic module 2 into the photodetector 3, thereby greatly improving the collection and transmission efficiency of the light radiation. In addition, there is no optical path composed of various optical lenses in the whole device, thereby eliminating the complex and cumbersome optical path adjustment steps, thereby improving the convenience in practical applications.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-wavelength temperature measurement device, characterized in that: include: A plurality of measuring units, each of the measuring units comprising: A light receiving module (1) comprising a first optical fiber (10) and a light focusing unit (11) coupled to one end of the first optical fiber (10), wherein the light focusing unit (11) is used to collect light radiation of a target substance and focus the light radiation onto the first optical fiber (10); A light splitting module (2), the entrance of which is connected to the other end of the first optical fiber (10), and is used to perform light splitting processing on the optical radiation, thereby outputting an optical signal with a specific wavelength; The photoelectric detector (3) has an inlet connected to an outlet of the light splitting module (2) via a second optical fiber (20) and is used to convert the optical signal output by the light splitting module (2) into an electrical signal and output it.

2. The multi-wavelength temperature measurement device according to claim 1, characterized in that: The light focusing unit (11) comprises a plano-convex lens and a biconvex lens.

3. The multi-wavelength temperature measurement device according to claim 1, characterized in that: The plurality of first optical fibers (10) are divided into at least one optical fiber group, and the light receiving module (1) further comprises connection flanges (13) corresponding to the number of the optical fiber groups; Each of the connecting flanges (13) is provided with through holes corresponding to the number of first optical fibers (10) in the optical fiber group, and the first optical fibers (10) are inserted into the through holes of the connecting flange (13) and are sealed with the through holes.

4. The multi-wavelength temperature measurement device according to claim 1, characterized in that: The light receiving module (1) further comprises an optical fiber bracket (12), wherein the optical fiber bracket (12) is provided with a plurality of through holes corresponding to the number of the first optical fibers (10), and a plurality of the first optical fibers (10) are inserted into the through holes of the optical fiber bracket (12), and a plurality of the optical fiber brackets (12) are arranged along the path of the first optical fibers (10).

5. The multi-wavelength temperature measurement device according to any one of claims 1 to 4, characterized in that: It also comprises a box body and a support base (4) arranged in the box body; the light splitting modules (2) and the photoelectric detectors (3) of the plurality of measuring units are integrally connected to the support base (4).

6. The multi-wavelength temperature measurement device according to claim 5, characterized in that: The support base (4) is provided with at least two layers, the spectroscopic module (2) and the photodetector (3) of each measuring unit are arranged on the same layer of the support base (4), and the spectroscopic module (2) on each layer is suitable for outputting optical signals within a set wavelength range.

7. The multi-wavelength temperature measurement device according to claim 6, characterized in that: The support base (4) is provided with a first layer (40) and a second layer (41); the plurality of the optical splitting modules (2) arranged on the first layer (40) are used to output optical signals in the infrared light wavelength range, and the plurality of the optical splitting modules (2) arranged on the second layer (41) are used to output optical signals in the visible light wavelength range.

8. The multi-wavelength temperature measurement device according to claim 7, characterized in that: The photoelectric detector (3) comprises a Si detector and an InGaAs detector; The Si detector is used for detecting the visible light part, and the InGaAs detector is used for detecting the infrared light part.

9. The multi-wavelength temperature measurement device according to claim 1, characterized in that: The light receiving module (1) also includes an optical bracket for locating the position of the light focusing unit (11).

10. A multi-wavelength temperature measurement system, characterized in that: It comprises an oscilloscope and a multi-wavelength temperature measurement device as claimed in any one of claims 1 to 9, wherein the oscilloscope is provided with a plurality of measurement channels for receiving electrical signals output by a plurality of photodetectors (3).

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