RGB three-color light-splitting temperature measuring device and method

Abstract

The invention discloses an RGB three-color light-splitting temperature measurement device and method, and relates to the technical field of light-splitting temperature measurement. Comprising an RGB light splitting lens used for splitting incident light into green light, blue light and red light and transmitting the green light, the blue light and the red light from different directions; the photoelectric sensor is used for detecting voltages corresponding to the green light, the blue light and the red light in different directions and transmitting the voltages to the digital processor; and the digital processor is used for calculating the temperature of the measured light source to which the incident light belongs based on the ratio of the voltages corresponding to any two of the green light, the blue light and the red light. Observed light is divided into independent R, G and B three-color light by the beam splitter prism, and voltage measurement of the R, G and B three-color light is performed by the photoelectric sensor based on the divided R, G and B three-color light, so that compared with the prior art, the measurement precision is higher, the measurement is not easily influenced by a guide medium, a guide distance and a measurement angle, and the limitation that an infrared sensor must be used is broken.

Description

Technical Field

[0001] The invention belongs to the technical field of spectroscopic temperature measurement, and in particular to an RGB three-color spectroscopic temperature measurement device and method. Background Art

[0002] At present, non-contact optical temperature measurement generally adopts the method of direct infrared measurement of heat sources, which is divided into the thermal pile method and the infrared direct response method. The former directly measures the heating intensity of the heat source, and the measuring sensor is directly aimed at the heat source, the closer the better, and there should be no objects blocking the heat in the middle; the latter measures the spectral response of the infrared sensor, and the sensor does not need to be close to the heat source, as long as the infrared rays can be guided over, such as using bent optical fibers to guide infrared rays. The former is suitable for general low-temperature fields, such as human body temperature measurement, and the latter is suitable for industrial high-temperature fields, such as flame temperature measurement.

[0003] When using monochrome infrared temperature measurement, due to various actual engineering differences such as different guided media, different lengths (distances), different observation angles, different sensor zero points, etc., the measurement results vary greatly, which brings a lot of inconvenience in engineering use. In addition, monochrome infrared temperature measurement also has certain limitations, such as the need to use infrared sensors. Summary of the invention

[0004] The purpose of the present invention is to provide an RGB three-color spectroscopic temperature measurement device and method. Through spectral pre-spectroscopy technology, a spectroscopic prism is used to separate the observed light into independent R, G, and B three-color lights, and then based on the separated R, G, and B three-color lights, a photoelectric sensor is used to measure the voltage of the R, G, and B three-color lights. Compared with the prior art, the measurement accuracy is higher, and it is not easily affected by the guiding medium, the guiding distance, and the measuring angle. It also breaks the limitation of having to use an infrared sensor, and solves the problems in the prior art.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] A first aspect of the present invention provides an RGB three-color spectroscopic temperature measurement device.

[0007] An RGB three-color spectroscopic temperature measurement device includes an RGB spectroscopic lens, a photoelectric sensor and a digital processor, wherein:

[0008] RGB beam splitter lens, which is used to split the incident light into green light, blue light and red light, and transmit the green light, blue light and red light from different directions;

[0009] A photoelectric sensor is used to detect voltages corresponding to green light, blue light and red light in different directions, respectively, and transmit the voltages to a digital processor;

[0010] The digital processor is used to calculate the temperature of the measured light source to which the incident light belongs based on the ratio of voltages corresponding to any two of the green light, the blue light and the red light.

[0011] Optionally, the digital processor is further configured to:

[0012] The temperature of the light source to be measured is calculated based on the product of the ratio of the voltage corresponding to the green light to the voltage corresponding to the blue light and the first colorimetric coefficient, combined with the reference temperature of the RGB spectroscopic lens when there is no light source;

[0013] Alternatively, the temperature of the measured light source is calculated based on the product of the ratio of the voltage corresponding to the red light to the voltage corresponding to the blue light and the second colorimetric coefficient, combined with the reference temperature of the RGB spectroscopic lens when there is no light source;

[0014] Alternatively, the temperature of the measured light source is calculated based on the product of the ratio of the voltage corresponding to the red light to the voltage corresponding to the green light and the third colorimetric coefficient, combined with the reference temperature of the RGB spectroscopic lens when there is no light source.

[0015] Optionally, the RGB beam splitter lens comprises a light extraction frame, an RGB beam splitter crystal is arranged in the light extraction frame, a beam splitter film is arranged in the RGB beam splitter crystal, and three light extraction holes in different directions are also arranged on the light extraction frame.

[0016] Optionally, a receiving groove is provided in the light extraction skeleton, and the RGB light splitting crystal is nested in the receiving groove, and the receiving groove is adapted to the RGB light splitting crystal.

[0017] Optionally, the light extraction holes are all communicated with the accommodating groove.

[0018] Optionally, three photoelectric sensors are provided, and the three photoelectric sensors are respectively provided corresponding to three light-collecting holes in different directions.

[0019] Optionally, the three light extraction holes are respectively arranged along the front side and the left and right sides of the light extraction frame.

[0020] Optionally, the dichroic film in the RGB dichroic crystal is used to separate the incident light into green light, blue light and red light, and project the green light to the front side and the red light and blue light to the left and right sides.

[0021] A second aspect of the present invention provides an RGB three-color spectroscopic temperature measurement method.

[0022] A RGB three-color spectrophotometric temperature measurement method comprises the following steps:

[0023] The RGB beam splitter lens splits the incident light into green light, blue light and red light, and transmits the green light, blue light and red light from different directions;

[0024] The photoelectric sensor detects the voltage corresponding to green light, blue light and red light in different directions respectively, and transmits the voltage to the digital processor;

[0025] The digital processor calculates the temperature of the measured light source to which the incident light belongs based on the ratio of the voltages corresponding to any two of the green light, the blue light and the red light.

[0026] Optionally, the digital processor calculates the temperature of the measured light source, and the specific formula is:

[0027] t=T0+k1*(V2 / V1)

[0028] or:

[0029] t=T0+k2*(V3 / V1)

[0030] or:

[0031] t=T0+k3*(V3 / V2)

[0032] Among them, T0 is the reference temperature of the RGB spectrometer when there is no light source; k1, k2, and k3 are the first colorimetric coefficient, the second colorimetric coefficient, and the third colorimetric coefficient, respectively; V1 is the voltage corresponding to blue light, V2 is the voltage corresponding to green light, and V3 is the voltage corresponding to red light.

[0033] The present invention has the following beneficial effects:

[0034] 1. The present invention provides an RGB three-color spectroscopic temperature measurement device and method. Through the spectral pre-spectroscopy technology, a spectroscopic prism is used to divide the observed light into independent R, G, and B three-color lights. Based on the divided R, G, and B three-color lights, a photoelectric sensor is used to measure the voltage of the R, G, and B three-color lights. Based on the ratio of the voltages corresponding to any two of the green light, the blue light, and the red light, the temperature of the measured light source to which the incident light belongs is calculated. Compared with the existing technology, the measurement accuracy is higher, and it is not easily affected by the infrared guiding medium, the guiding distance, and the measuring angle, and it is suitable for promotion in engineering use.

[0035] 2. The present invention calculates the temperature of the measured light source or the incident light by using the ratio of the voltage corresponding to green light to the voltage corresponding to blue light, or the ratio of the voltage corresponding to red light to the voltage corresponding to blue light, or the ratio of the voltage corresponding to red light to the voltage corresponding to green light. In actual measurement, it is only necessary to obtain the corresponding voltage values ​​of the two lights after splitting to calculate the temperature value, which is very convenient to operate.

[0036] 3. The RGB three-color spectroscopic temperature measurement device of the present invention includes a front-end RGB spectroscopic lens and three photoelectric sensors corresponding to green G, blue B, and red R. It has a simple structure and low cost. It is suitable for high-temperature environment observation, such as flame observation of industrial boilers. It can be used for flame spectroscopic detection, temperature measurement, flame dynamic feature detection, AI feature detection, etc.

[0037] 4. The present invention breaks the limitation in the prior art that infrared sensors must be used for monochrome infrared temperature measurement. RGB photoelectric sensors can use a unified standard sensor, avoiding the trouble of selecting a specific spectrum sensor, and opening up a new path and method for standardized optical temperature measurement.

[0038] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0040] Figure 1 This is a schematic diagram of an RGB beam splitter lens without an RGB beam splitter crystal according to a first embodiment of the present invention.

[0041] Figure 2 This is a schematic diagram of the RGB spectroscopic crystal structure of the present invention.

[0042] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0043] 1RGB spectroscopic lens, 2light collecting frame, 3RGB spectroscopic crystal, 4light collecting hole, 5accommodating slot, 6No. 1 photoelectric sensor, 7No. 2 photoelectric sensor, 8No. 3 photoelectric sensor, 9incident light, 10green light, 11blue light, 12red light. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0045] Embodiment 1:

[0046] See also Figure 1As shown, this embodiment provides an RGB three-color spectroscopic temperature measurement device, which is suitable for high-temperature environment observation, such as flame observation of industrial boilers, and can be used for flame spectroscopic detection, temperature measurement, flame dynamic feature detection, AI feature detection, etc. This embodiment breaks the limitation of traditional single-color infrared temperature measurement that requires infrared rays to be guided to the infrared sensor through an infrared guiding medium for optical detection, avoids the influence of the guiding medium, guiding distance, and measurement angle on the temperature measurement results, and generally speaking, the temperature measurement accuracy is higher.

[0047] like Figure 1 As shown, the RGB three-color spectroscopic temperature measuring device of the present embodiment comprises an RGB spectroscopic lens 1, a photoelectric sensor and a digital processor, wherein the RGB spectroscopic lens 1 comprises a light-collecting skeleton 2, a receiving groove 5 is pre-opened in the light-collecting skeleton 2, an RGB spectroscopic crystal 3 is arranged in the receiving groove 5, a spectroscopic film is arranged in the RGB spectroscopic crystal 3, and the spectroscopic film is used to divide the incident light 9 into green light 10, blue light 11 and red light 12, and project the green light 10 to the front side, and project the red light 12 and the blue light 11 to the left and right sides; three light-collecting holes 4 in different directions are also arranged on the light-collecting skeleton 2, and the three light-collecting holes 4 are respectively arranged along the front side and the left and right sides of the light-collecting skeleton 2. By setting the light-collecting holes 4, it is realized that the incident light 9 is split, and the split green light 10, blue light 11 and red light 12 are transmitted from different light-collecting holes 4.

[0048] The RGB spectroscopic crystal 3 passes the light focused from the lens through the spectroscopic film in the crystal, and splits the light into three directions. The forward light after the splitting is the middle spectrum light (green G), the right direction is the high spectrum light (blue B), and the left direction is the low spectrum light (red R). The light extraction skeleton 2 is a fixed kit that nests the square RGB spectroscopic crystal 3 and leaves three light extraction holes 4 in the forward, right and left directions. During measurement, the light enters from the incident surface of the crystal, and the three-color light is transmitted from the three windows of the front port (G), right port (B), and left port (R) of the light extraction skeleton 2.

[0049] It can be understood that the three light extraction holes 4 are all connected to the containing groove 5, so that the three types of light after the incident light 9 is split can be transmitted through the light extraction holes 4 to achieve subsequent temperature detection.

[0050] The receiving groove 5 in this embodiment is a square groove pre-opened, and the RGB spectrometer crystal 3 is nested inside the receiving groove 5. The shape of the RGB spectrometer crystal 3 is also square, and the receiving groove 5 is adapted to the RGB spectrometer crystal 3. When the RGB spectrometer crystal 3 is placed in the square groove, the square groove can limit the RGB spectrometer crystal 3 to a certain extent.

[0051] The square RGB spectroscopic crystal 3 is embedded in the RGB spectroscopic lens 1. The right side is a zoom lens for focusing the light, and the middle is a spectroscopic lens for splitting the light into three. The RGB spectroscopic crystal 3 is a square body composed of two triangular wedge-shaped crystals. A filter reflective film is provided on the triangular inclined surface, which can split the incident light 9 from the lens into three and divide it into three vertical directions. The forward light after the splitting is the middle spectrum light (green G), the right side is the high spectrum light (blue B), and the left side is the low spectrum light (red R).

[0052] Digital cameras are also set in the three directions of the exit of the spectroscopic lens skeleton, the forward direction is the green spectrum segment G camera, the right direction is the blue spectrum segment B camera, and the left direction is the red spectrum segment R camera.

[0053] In this embodiment, when the light of the LED flashlight is used as the incident light 9 to illuminate the RGB spectroscopic crystal 3, the RGB spectroscopic crystal 3 spectroscopically splits the light of the LED flashlight, and the spectroscopic film splits the incident light 9 into green light 10, blue light 11 and red light 12, and projects the green light 10 to the front, and projects the red light 12 and blue light 11 to the left and right sides, and the light extraction hole 4 on the front side of the RGB spectroscopic crystal 3 will appear green light 10, and the light extraction holes 4 on both sides will respectively appear blue light 11 and red light 12. Using a spectroscopic film and a spectroscopic crystal to split light belongs to the prior art and will not be described in detail here.

[0054] There are three photoelectric sensors in this embodiment, and the three photoelectric sensors are respectively arranged corresponding to the light-collecting holes 4 in three different directions. Among them, the first photoelectric sensor 6 senses blue light 11B, the second photoelectric sensor 7 senses green light 10G, and the third photoelectric sensor 8 senses red light 12R.

[0055] It can be understood that the photoelectric sensor is used to convert the optical signal into an electrical signal. In the present embodiment, the corresponding voltage of the blue light 11B is sensed by the first photoelectric sensor 6, the corresponding voltage of the green light 10G is sensed by the second photoelectric sensor 7, and the corresponding voltage of the red light 12R is sensed by the third photoelectric sensor 8. The sensed voltages are transmitted to the digital processor after passing through the analog processing circuit. The digital processor calculates the temperature of the measured light source to which the incident light 9 belongs based on the ratio of the voltages corresponding to any two of the green light 10, the blue light 11 and the red light 12.

[0056] Specifically, the digital processor is also used for:

[0057] Based on the product of the ratio of the voltage corresponding to the green light 10 and the voltage corresponding to the blue light 11 and the first colorimetric coefficient, combined with the reference temperature of the RGB spectroscopic lens 1 when there is no light source, the temperature of the measured light source is calculated;

[0058] Alternatively, the temperature of the measured light source is calculated based on the product of the ratio of the voltage corresponding to the red light 12 to the voltage corresponding to the blue light 11 and the second colorimetric coefficient, combined with the reference temperature of the RGB spectroscopic lens 1 when there is no light source;

[0059] Alternatively, the temperature of the measured light source is calculated based on the product of the ratio of the voltage corresponding to the red light 12 to the voltage corresponding to the green light 10 and the third colorimetric coefficient, combined with the reference temperature of the RGB spectroscopic lens 1 when there is no light source.

[0060] Among them, the first colorimetric coefficient, the second colorimetric coefficient and the third colorimetric coefficient are respectively:

[0061] The first colorimetric coefficient is the ratio of the voltage sampling value of the blue light B to the voltage sampling value of the green light G in the engineering example.

[0062] The second colorimetric coefficient is the ratio of the voltage sampling value of the blue light B to the voltage sampling value of the red light R in the engineering example.

[0063] The third colorimetric coefficient is the ratio of the voltage sampling value of the red light R to the voltage sampling value of the green light G in the engineering example.

[0064] In actual temperature measurement use of this embodiment, it is only necessary to obtain the corresponding voltage values ​​of the two types of light after splitting to calculate the temperature value, which is very convenient to operate.

[0065] Assuming that the voltage corresponding to the blue light 11 obtained by the digital processor is V1, the voltage corresponding to the green light 10 is V2, and the voltage corresponding to the red light 12 is V3, the temperature of the measured light source is calculated as:

[0066] t = T0 + k1 * (V2 / V1);

[0067] or:

[0068] t = T0 + k2 * (V3 / V1);

[0069] or:

[0070] t = T0 + k3 * (V3 / V2);

[0071] Wherein, T0 is the reference temperature of the RGB beam splitter lens 1 when there is no light source; k1, k2, and k3 are the first colorimetric coefficient, the second colorimetric coefficient, and the third colorimetric coefficient, respectively.

[0072] In this embodiment, the first colorimetric coefficient, the second colorimetric coefficient and the third colorimetric coefficient can all be obtained through experiments, which will not be described in detail herein.

[0073] Working principle:

[0074] In this embodiment, the front end adopts an RGB spectroscopic lens 1, and the rear end is three (R, G, B) independent photoelectric sensors. The crystal in the RGB spectroscopic lens 1 is square, and a spectroscopic film is provided in the crystal to split the incident light 9 into three and project it in three directions. The forward light after the spectroscopic splitting is the middle spectrum light (green G), the right direction is the high spectrum light (blue B), and the left direction is the low spectrum light (red R).

[0075] Photoelectric sensor No. 1 6 is installed at the right exit (B) of the light extraction frame 2, photoelectric sensor No. 2 7 is installed at the front exit (G) of the light extraction frame 2, and photoelectric sensor No. 3 8 is installed at the left exit (R) of the light extraction frame 2. The three photoelectric sensors respectively obtain the corresponding voltages of the three types of light after the splitting is completed, and transmit them to the digital processor;

[0076] The digital processor calculates the temperature of the measured light source to which the incident light 9 belongs based on the ratio of the voltages corresponding to any two of the green light 10, the blue light 11 and the red light 12.

[0077] Embodiment 2:

[0078] This embodiment provides an RGB three-color spectroscopic temperature measurement method.

[0079] A RGB three-color spectrophotometric temperature measurement method comprises the following steps:

[0080] The RGB beam splitter lens 1 splits the incident light 9 into green light 10, blue light 11 and red light 12, and transmits the green light 10, blue light 11 and red light 12 from different directions;

[0081] The photoelectric sensor detects the voltages corresponding to the green light 10, the blue light 11 and the red light 12 in different directions respectively, and transmits the voltages to the digital processor;

[0082] The digital processor calculates the temperature of the measured light source to which the incident light 9 belongs based on the ratio of the voltages corresponding to any two of the green light 10, the blue light 11 and the red light 12.

[0083] Furthermore, the digital processor calculates the temperature of the light source under test, and the specific formula is:

[0084] t = T0 + k1 * (V2 / V1);

[0085] or:

[0086] t = T0 + k2 * (V3 / V1);

[0087] or:

[0088] t = T0 + k3 * (V3 / V2);

[0089] Among them, T0 is the reference temperature of the RGB spectroscopic lens 1 when there is no light source; k1, k2, k3 are the first colorimetric coefficient, the second colorimetric coefficient and the third colorimetric coefficient respectively; V1 is the voltage corresponding to the blue light 11, V2 is the voltage corresponding to the green light 10, and V3 is the voltage corresponding to the red light 12.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0091] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An RGB three-color spectroscopic temperature measurement device, characterized in that: It includes RGB spectroscopic lens, photoelectric sensor and digital processor, among which: RGB spectrometer, which is used to split the incident light into green light, blue light and red light, and transmit the green light, blue light and red light from different directions; A photoelectric sensor is used to detect voltages corresponding to green light, blue light and red light in different directions, respectively, and transmit the voltages to a digital processor; The digital processor is used to calculate the temperature of the measured light source to which the incident light belongs based on the ratio of voltages corresponding to any two of the green light, the blue light and the red light.

2. The RGB three-color spectroscopic temperature measurement device according to claim 1, characterized in that: The digital processor is also used to: The temperature of the light source to be measured is calculated based on the product of the ratio of the voltage corresponding to the green light to the voltage corresponding to the blue light and the first colorimetric coefficient, combined with the reference temperature of the RGB spectroscopic lens when there is no light source; Alternatively, the temperature of the measured light source is calculated based on the product of the ratio of the voltage corresponding to the red light to the voltage corresponding to the blue light and the second colorimetric coefficient, combined with the reference temperature of the RGB spectroscopic lens when there is no light source; Alternatively, the temperature of the measured light source is calculated based on the product of the ratio of the voltage corresponding to the red light to the voltage corresponding to the green light and the third colorimetric coefficient, combined with the reference temperature of the RGB spectroscopic lens when there is no light source.

3. The RGB three-color spectroscopic temperature measurement device according to claim 1, characterized in that: The RGB light-splitting lens comprises a light-collecting frame, an RGB light-splitting crystal is arranged in the light-collecting frame, a light-splitting film is arranged in the RGB light-splitting crystal, and three light-collecting holes in different directions are also arranged on the light-collecting frame.

4. The RGB three-color spectroscopic temperature measurement device according to claim 3, characterized in that: A receiving groove is arranged in the light extraction frame, and the RGB light splitting crystal is nested in the receiving groove, and the receiving groove is adapted to the RGB light splitting crystal.

5. The RGB three-color spectroscopic temperature measurement device according to claim 4, characterized in that: The light extraction holes are all communicated with the accommodating grooves.

6. The RGB three-color spectroscopic temperature measurement device according to claim 3, characterized in that: There are three photoelectric sensors, and the three photoelectric sensors are respectively arranged corresponding to the light extraction holes in three different directions.

7. The RGB three-color spectroscopic temperature measurement device according to claim 3, characterized in that: The three light extraction holes are respectively arranged along the front side and the left and right sides of the light extraction frame.

8. The RGB three-color spectroscopic temperature measurement device according to claim 3, characterized in that: The dichroic film in the RGB dichroic crystal is used to separate the incident light into green light, blue light and red light, and project the green light to the front side and the red light and blue light to the left and right sides.

9. A RGB three-color spectroscopic temperature measurement method, characterized in that: The following steps are involved: The RGB beam splitter lens splits the incident light into green light, blue light and red light, and transmits the green light, blue light and red light from different directions; The photoelectric sensor detects the voltage corresponding to green light, blue light and red light in different directions respectively, and transmits the voltage to the digital processor; The digital processor calculates the temperature of the measured light source to which the incident light belongs based on the ratio of the voltages corresponding to any two of the green light, the blue light and the red light.

10. The RGB three-color spectroscopic temperature measurement method according to claim 9, characterized in that: The digital processor calculates the temperature of the light source under test, and the specific formula is: t=T0+k1*(V2 / V1) or: t=T0+k2*(V3 / V1) or: t=T0+k3*(V3 / V2) Among them, T0 is the reference temperature of the RGB spectrometer when there is no light source; k1, k2, and k3 are the first colorimetric coefficient, the second colorimetric coefficient, and the third colorimetric coefficient, respectively; V1 is the voltage corresponding to blue light, V2 is the voltage corresponding to green light, and V3 is the voltage corresponding to red light.

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