Full-spectrum irradiance monitoring control method and system

Abstract

The invention provides a full-spectrum irradiance monitoring control method and system, and the method comprises the steps: receiving a first light irradiation signal from a light source through a photo-thermal sensor, carrying out the heat conversion of the first light irradiation signal, obtaining first heat characterization data, and transmitting the first heat characterization data to a PLC controller; the photo-thermal sensor receives a second light irradiation signal from the light source after a preset time period, performs heat conversion on the second light irradiation signal to obtain second heat characterization data, and sends the second heat characterization data to the PLC; and the PLC performs heat difference calculation on the first heat characterization data and the second heat characterization data, determines a radiation energy value generated by the light source in a preset time period, and determines the irradiance corresponding to the light source according to the radiation energy value. According to the invention, through photo-thermal energy conversion, accurate detection of the irradiance of an infrared band of 300 nm to 3000 nm can be realized, so that accurate monitoring of the irradiance is realized.

Description

Technical Field

[0001] The present application relates to the field of irradiance detection technology, and in particular to a full-spectrum irradiance monitoring and control method and system. Background Art

[0002] There are currently four main types of photoaging equipment, including xenon lamps, UV lamps, carbon arc lamps and light sources. Irradiance parameter control is the core technical requirement of photoaging equipment. Xenon lamps and UV aging boxes have light source spectra in the ultraviolet and visible light range. The UV light source spectrum is mainly concentrated in 300nm-400nm, and the xenon lamp light source spectrum is mainly concentrated in 300nm-800nm. The current irradiance detection sensor has a spectral response range of 250nm-1100nm, so the existing irradiance detection technology can effectively cover the spectral range of ultraviolet and xenon light sources.

[0003] However, the spectrum of the light source is between 300nm-3000nm, but the existing longest coverage light irradiance probe can only detect and display the irradiance intensity of 300-1100nm, but cannot detect the infrared band of 1100nm-3000nm. In other words, the equipment itself cannot monitor the irradiance according to the standard requirements. Summary of the invention

[0004] In view of this, the purpose of the present application is to at least provide a full-spectrum irradiance monitoring and control method and system, which can realize accurate detection of irradiance in the 300nm-3000nm infrared band through photothermal energy conversion, thereby realizing accurate monitoring of irradiance.

[0005] This application mainly includes the following aspects:

[0006] In a first aspect, an embodiment of the present application provides a full-spectrum irradiance monitoring and control method, which is applied to a full-spectrum irradiance monitoring and control system. The spectral irradiance monitoring and control system includes a light source aging test chamber, a photothermal sensor and a PLC controller. The photothermal sensor is placed in the light source aging test chamber and is placed directly opposite the light source in the light source aging test chamber. The method includes: the photothermal sensor receives a first light irradiation signal from the light source, and performs heat conversion on the first light irradiation signal to obtain first heat characterization data, and sends the first heat characterization data to the PLC controller; the photothermal sensor receives a second light irradiation signal from the light source after a preset time period, and performs heat conversion on the second light irradiation signal to obtain second heat characterization data, and sends the second heat characterization data to the PLC controller; the PLC controller calculates the heat difference between the first heat characterization data and the second heat characterization data, determines the radiation energy value generated by the light source within the preset time period, and determines the irradiance corresponding to the light source based on the radiation energy value.

[0007] In a possible embodiment, the photothermal sensor includes a quartz glass cover, a blackbody temperature sensor, a signal processing circuit, a fully enclosed sensor housing and a photothermal signal output component, the quartz glass cover is enclosed on the fully enclosed sensor housing, the blackbody temperature sensor, the signal processing circuit and the photothermal signal output component are located in the fully enclosed sensor housing, and the thermal characterization data includes a temperature signal, a resistance signal and an analog signal, wherein the method further includes: the blackbody temperature sensor receives a first light irradiation signal through the quartz glass cover, and converts the first light irradiation signal into a first target temperature signal; the blackbody temperature sensor searches a temperature resistance comparison table to determine a first target resistance signal corresponding to the first target temperature signal, and transmits the first target resistance signal to the signal processing circuit, the temperature resistance comparison table It includes a mapping relationship between multiple temperature signals and multiple resistance signals; the signal processing circuit converts the first target resistance signal into a corresponding first target analog signal, and sends the first target analog signal to the PLC controller in sequence through the photothermal signal output component and the optical fiber; the blackbody temperature sensor receives the second light irradiation signal through the quartz glass cover, and converts the second light irradiation signal into a second target temperature signal; the blackbody temperature sensor searches the temperature resistance comparison table, determines the second target resistance signal corresponding to the second target temperature signal, and transmits the second target resistance signal to the signal processing circuit; the signal processing circuit converts the second target resistance signal into a corresponding second target analog signal, and sends the second target analog signal to the PLC controller in sequence through the photothermal signal output component and the optical fiber.

[0008] In one possible implementation, the PLC controller determines the irradiance corresponding to the light source in the following manner: determining the target potential difference corresponding to the preset time period based on the difference between the second target analog signal and the first target analog signal; determining the irradiance corresponding to the light source based on a preset relationship formula and the target potential difference.

[0009] In a possible embodiment, the spectral irradiance monitoring and control system also includes a power regulating rectifier, wherein the method also includes: the PLC controller converts the received target analog signal into a corresponding target digital signal, compares the target digital signal with a preset standard digital signal, determines the target signal difference between the target digital signal and the preset standard digital signal, determines the radiation control signal for the light source based on the target signal difference, and sends the radiation control signal and the target signal difference to the power regulating rectifier; the power regulating rectifier determines the target output power for the light source based on the radiation control signal, the target signal difference and the preset adjustment strategy, and outputs the target output power to the light source, so that the light source operates under the target output power.

[0010] In one possible implementation, the radiation control signal includes a positive electrical signal and a negative electrical signal, wherein the PLC controller determines the radiation control signal in the following manner: A1. If the target signal difference is a negative number, a positive electrical signal is generated and the positive electrical signal is sent to the power regulating rectifier; A2. If the target signal difference is a positive number, a negative electrical signal is generated and the negative electrical signal is sent to the power regulating rectifier; repeat steps A1 to A2 until the target digital signal is consistent with the preset standard digital signal.

[0011] In one possible implementation, the preset adjustment strategy includes: obtaining a preset power level adjustment table, which describes the mapping relationship between multiple signal differences and multiple adjustment powers; searching for a target adjustment power corresponding to the target signal difference from the preset power level adjustment table; and determining a target output power for the light source according to the target adjustment power.

[0012] In a possible implementation, the spectral irradiance monitoring and control system further includes a display device, and the method further includes: the PLC controller sends the irradiance corresponding to the light source to the display device; and the display device displays the irradiance corresponding to the light source in real time.

[0013] In the second aspect, the embodiment of the present application also provides a full-spectrum irradiance monitoring and control system, which includes a light source aging test chamber, a photothermal sensor and a PLC controller, wherein the photothermal sensor is placed in the light source aging test chamber and is placed directly opposite the light source in the light source aging test chamber, wherein the photothermal sensor receives a first light irradiation signal from the light source, and performs heat conversion on the first light irradiation signal to obtain first heat characterization data, and sends the first heat characterization data to the PLC controller; the photothermal sensor receives a second light irradiation signal from the light source after a preset time period, and performs heat conversion on the second light irradiation signal to obtain second heat characterization data, and sends the second heat characterization data to the PLC controller; the PLC controller calculates the heat difference between the first heat characterization data and the second heat characterization data, determines the radiation energy value generated by the light source within the preset time period, and determines the irradiance corresponding to the light source based on the radiation energy value.

[0014] In a possible implementation, the photothermal sensor includes a quartz glass cover, a black body temperature sensor, a signal processing circuit, a fully enclosed sensor housing, and a photothermal signal output component. The quartz glass cover is enclosed on the fully enclosed sensor housing. The black body temperature sensor, the signal processing circuit, and the photothermal signal output component are located in the fully enclosed sensor housing. The thermal characterization data includes a temperature signal, a resistance signal, and an analog signal. The black body temperature sensor receives a first light irradiation signal through the quartz glass cover and converts the first light irradiation signal into a first target temperature signal. The black body temperature sensor searches a temperature resistance comparison table to determine a first target resistance signal corresponding to the first target temperature signal, and transmits the first target resistance signal to the signal processing circuit. The preset temperature-resistance comparison table includes a mapping relationship between multiple temperature signals and multiple resistance signals; the signal processing circuit converts the first target resistance signal into a corresponding first target analog signal, and sends the first target analog signal to the PLC controller through the optical fiber; the blackbody temperature sensor receives the second light irradiation signal through the quartz glass cover, and converts the second light irradiation signal into a second target temperature signal; the blackbody temperature sensor searches the temperature-resistance comparison table, determines the second target resistance signal corresponding to the second target temperature signal, and transmits the second target resistance signal to the signal processing circuit; the signal processing circuit converts the second target resistance signal into a corresponding second target analog signal, and sends the second target analog signal to the PLC controller through the optical fiber.

[0015] In one possible implementation, the spectral irradiance monitoring and control system also includes a power regulating rectifier, and the PLC controller converts the received target analog signal into a corresponding target digital signal, compares the target digital signal with a preset standard digital signal, determines the target signal difference between the target digital signal and the preset standard digital signal, determines the radiation control signal for the light source based on the target signal difference, and sends the radiation control signal and the target signal difference to the power regulating rectifier; the power regulating rectifier determines the target output power for the light source based on the radiation control signal, the target signal difference and the preset adjustment strategy, and outputs the target output power to the light source so that the light source operates under the target output power.

[0016] The embodiment of the present application provides a full-spectrum irradiance monitoring and control method and system, wherein a photothermal sensor receives a first light irradiation signal from a light source, performs heat conversion on the first light irradiation signal, obtains first heat characterization data, and sends the first heat characterization data to a PLC controller; the photothermal sensor receives a second light irradiation signal from the light source after a preset time period, performs heat conversion on the second light irradiation signal, obtains second heat characterization data, and sends the second heat characterization data to a PLC controller; the PLC controller calculates the heat difference between the first heat characterization data and the second heat characterization data, determines the radiation energy value generated by the light source within the preset time period, and determines the irradiance corresponding to the light source based on the radiation energy value. The present application can realize accurate detection of irradiance in the 300nm-3000nm infrared band through photothermal energy conversion, thereby realizing accurate monitoring of irradiance.

[0017] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 One of the interactive schematic diagrams of a full-spectrum irradiance monitoring and control system provided by an embodiment of the present application is shown;

[0020] Figure 2 A schematic diagram of the structure of a full-spectrum irradiance monitoring and control system provided in an embodiment of the present application is shown;

[0021] Figure 3 A schematic diagram of the structure of a photothermal sensor provided in an embodiment of the present application is shown;

[0022] Figure 4 A second interactive schematic diagram of a full-spectrum irradiance monitoring and control system provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0023] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art, under the guidance of the content of the present application, can add one or more other operations to the flowchart, or remove one or more operations from the flowchart.

[0024] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0025] With the research and development of material aging and anti-aging, various types of aging detection equipment in my country are also in a stage of rapid development. In particular, domestic products are replacing imported similar products. In the past, my country's aging detection equipment mainly relied on imported equipment. However, with the development of my country's national strength, technology, economy and rigid needs, the core technical barriers and problems of imported products have become more prominent. In terms of light aging equipment, the irradiance control system has always been the core system of the equipment, which quantifies the solar spectrum energy of natural outdoor exposure as the irradiance parameters for artificial accelerated aging tests.

[0026] There are four types of aging test equipment in the photo-aging equipment, namely xenon lamp, ultraviolet lamp, carbon arc lamp and light source. Irradiance parameter control is the core technical requirement of photo-aging equipment. Xenon lamp and ultraviolet aging box have light source spectrum in the ultraviolet and visible light range. The spectrum of ultraviolet light source is mainly concentrated in 300nm-400nm, and the spectrum of xenon light source is mainly concentrated in 300nm-800nm. At present, the spectral response range of irradiance detection sensor is mainly concentrated between 250nm-1100nm, so the existing irradiance detection technology can effectively cover the spectrum range of ultraviolet and xenon light sources.

[0027] However, the spectrum of the light source is between 300nm-3000nm, and the irradiance sensor provided by the prior art adopts the coreless photoelectric sensing principle technology to realize body detection. As a result, the irradiance sensor provided by the prior art has the defect that it cannot detect irradiance in the infrared band. Therefore, the prior art cannot be used for irradiance control of this type of light aging equipment.

[0028] The main standards currently used in light source aging test chambers are: DIN75220, MIL-STD-810, GB / T:2423.24, GJB 150.7A, IEC 68-2-5. The above standards clearly state that the irradiance of the light source in the irradiance band range of 300nm-3000nm is 1120W / ㎡, but the existing longest coverage light irradiance probe can only detect and display the irradiance intensity of 300-1100nm. It can be seen that the existing irradiance detectors and the equipment themselves cannot monitor the irradiance according to the above standards.

[0029] Based on this, the embodiment of the present application provides a full-spectrum irradiance monitoring and control method and system, which can realize accurate detection of irradiance in the 300nm-3000nm infrared band through photothermal energy conversion, thereby realizing accurate monitoring of irradiance, as follows:

[0030] See also Figure 1 , Figure 1 FIG. 1 shows one of the interactive schematic diagrams of a full-spectrum irradiance monitoring and control system provided in an embodiment of the present application. Figure 2 , Figure 2 FIG. 1 is a schematic diagram showing the structure of a full spectrum irradiance monitoring and control system provided by an embodiment of the present application. Figure 1 and Figure 2 As shown, the full-spectrum irradiance monitoring and control method provided in the embodiment of the present application is applied to a full-spectrum irradiance monitoring and control system. The full-spectrum irradiance monitoring and control system includes a light source aging test box 1, a photothermal sensor 2 and a PLC controller 3. The photothermal sensor 2 is placed in the light source aging test box 1 and is placed opposite to the light source 11 in the light source aging test box 1. The photothermal sensor 2 is connected to the PLC controller 3 via an optical fiber.

[0031] In a preferred embodiment, if Figure 1 As shown, for the photothermal sensor 2, execute:

[0032] S100: Receive a first light irradiation signal from a light source.

[0033] S101 , performing heat conversion on a first light irradiation signal to obtain first heat characterization data.

[0034] S102: Send the first heat characterization data to a PLC controller.

[0035] S103 . Receive a second light irradiation signal from the light source after a preset time period.

[0036] S104, performing heat conversion on the second light irradiation signal to obtain second heat characterization data.

[0037] S105: Send the second heat characterization data to the PLC controller.

[0038] For PLC controller 3, execute:

[0039] S200 , calculating the heat difference between the first heat characterization data and the second heat characterization data to determine the radiation energy value generated by the light source within a preset time period.

[0040] S201. Determine the irradiance corresponding to the light source according to the radiation energy value.

[0041] Specifically, in the present application, according to different types of light sources 11, it can emit light irradiation signals in different bands. Specifically, if the light source 11 is an ultraviolet light source, it will emit a light irradiation signal in the 300nm-400nm band. If the light source 11 is a xenon light source, it will emit a light irradiation signal in the 300nm-800nm ​​band. If the light source 11 is a metal halide lamp, it will emit a light irradiation signal in the 300nm-3000nm band. After the light source 11 is started, the emitted light irradiation signal is received by the photothermal sensor 2, and the photothermal sensor 2 receives the emitted light irradiation signal. 2 performs photothermal signal conversion, and further sends the converted heat characterization data to the PLC controller 3 for processing. The PLC controller 3 calculates the heat difference generated within the preset time period to obtain the radiation energy value within the period, and further obtains the irradiance based on the radiation energy value. It can be seen that the full-spectrum irradiance monitoring and control method provided in the present application can effectively realize the irradiance monitoring function of the 300nm-3000nm band, and finally enables the test equipment to set and monitor the irradiance with the help of this method, while meeting the requirements of the standard.

[0042] See also Figure 3 , Figure 3 FIG. 1 shows a schematic diagram of the structure of a photothermal sensor provided in an embodiment of the present application. Figure 3 As shown, the photothermal sensor 2 includes a quartz glass cover 21, a black body temperature sensor 22, a signal processing circuit 23, a fully enclosed sensor housing 24 and a photothermal signal output component 25. Specifically, the quartz glass cover 21 is enclosed and covers the fully enclosed sensor housing 24, and the black body temperature sensor 22, the signal processing circuit 23 and the photothermal signal output component 25 are located in the fully enclosed sensor housing 24, wherein the thermal characterization data includes a temperature signal, a resistance signal and an analog signal.

[0043] In a preferred embodiment, the photothermal sensor 2 further performs:

[0044] The blackbody temperature sensor 22 receives the first light irradiation signal through the quartz glass cover 21, and converts the first light irradiation signal into a first target temperature signal. The blackbody temperature sensor 22 searches the temperature resistance comparison table, determines the first target resistance signal corresponding to the first target temperature signal, and transmits the first target resistance signal to the signal processing circuit 23. The preset temperature resistance comparison table includes a mapping relationship between multiple temperature signals and multiple resistance signals. The signal processing circuit 23 converts the first target resistance signal into a corresponding first target analog signal, and sends the first target analog signal to the PLC controller 3 in sequence through the photothermal signal output component 25 and the optical fiber.

[0045] The blackbody temperature sensor 22 receives the second light irradiation signal through the quartz glass cover 21, and converts the second light irradiation signal into a second target temperature signal. The blackbody temperature sensor 22 looks up the temperature resistance comparison table, determines the second target resistance signal corresponding to the second target temperature signal, and transmits the second target resistance signal to the signal processing circuit 23. The signal processing circuit 23 converts the second target resistance signal into a corresponding second target analog signal, and sends the second target analog signal to the PLC controller through the photothermal signal output component 25 and the optical fiber in sequence.

[0046] In a specific embodiment, if Figure 3 As shown, a light sensing element 26 is further provided between the blackbody temperature sensor 22 and the quartz glass cover 21, for better transmitting the light irradiation signal transmitted through the quartz glass cover 21 to the blackbody temperature sensor 22. In the present application, the blackbody temperature sensor 22 is a temperature sensor with a blackbody layer attached to the surface. Since the absorption coefficient of the black material is close to 1 in the full spectrum range, the blackbody material can convert the light irradiation signal into heat energy almost without loss, and its black receiver absorbs all the received energy and converts it into heat energy. This heat energy causes the temperature of the blackbody temperature sensor to rise.

[0047] The black body temperature sensor 22 has a cold node at its back, thereby forming a thermoelectric potential with the surface of the black body temperature sensor 22 . The thermoelectric potential is proportional to the solar radiation intensity. The surface of the black body sensor meets the standard orientation requirements of the spectrum.

[0048] In addition, taking the first light irradiation signal emitted by the light source 11 as an example, the first light irradiation signal irradiated to the surface of the blackbody temperature sensor inside the photothermal sensor is absorbed by the blackbody coating and converted into heat, thereby increasing the temperature of the blackbody temperature sensor. The blackbody temperature sensor can detect the corresponding first target temperature signal, and then further search for the first target resistance signal corresponding to the first target temperature signal according to the pre-created temperature-resistance comparison table corresponding to the blackbody temperature sensor. The temperature signal is represented by a temperature value, and the resistance signal is represented by a resistance value. Then, the signal processing circuit is responsible for converting the first target resistance signal into a corresponding first target analog signal, and the analog signal is a voltage signal or a current signal. Then, further, the signal processing circuit sends the first target analog signal to the PLC controller through the photothermal signal output component and the optical fiber in sequence. In the present application, the blackbody temperature sensor can adopt a temperature sensor PT100 with a blackbody coating attached to its surface.

[0049] In this method, the temperature difference is usually characterized by a resistance value. This method uses a conventional PT100 temperature sensor black body sensor element to convert the received temperature into a resistance signal, which enters the signal processing circuit as a temperature characterization value.

[0050] Table 1

[0051]

[0052]

[0053] As shown in Table 1, Table 1 is a temperature resistance comparison table corresponding to the temperature sensor PT100.

[0054] Table 1 records the corresponding resistance signals of the temperature sensor PT100 at various temperatures within the temperature range of -40°C to 150°C. Specifically, Temp represents the temperature signal (meaning the temperature value), and Resistance represents the resistance signal (meaning the resistance value). For example, when Temp = -40°C, Resistance = 8427Ω, it means that when the temperature signal indicates that the temperature is -40°C, the corresponding resistance signal is 8427Ω.

[0055] Specifically, the conversion formula of PT100 temperature and resistance value is:

[0056]

[0057] In this formula, T represents the temperature value, R represents the resistance value, and α = 3.9080 × 10 -3 , β=-5.8019×10 -7 .

[0058] The second target analog signal is determined in the same manner as the first target analog signal, and will not be described in detail herein.

[0059] In another preferred embodiment, the PLC controller determines the irradiance corresponding to the light source in the following manner:

[0060] According to the difference between the second target analog signal and the first target analog signal, the target potential difference corresponding to the preset time period is determined, and according to the preset relationship formula between the potential difference and the irradiance and the target potential difference, the irradiance corresponding to the light source is determined.

[0061] Specifically, when the power supply corresponding to the photothermal sensor is stable, the output signal U of the photothermal sensor depends only on the heat value Hs within the response spectrum range it receives, and the two are in direct proportion. Specifically, it can be expressed by the following formula:

[0062] U=k·H s (1)

[0063] In formula (1), k represents the first proportional coefficient between the output signal U of the photothermal sensor and Hs.

[0064] Assuming that the light source 11 is a metal halide lamp, the spectral energy distribution of the metal halide lamp is stable and unchanged, then Hs is proportional to the total radiation heat H of the light source 11, that is:

[0065] H s =k s ·H (2)

[0066] In Publication (2), k s Represents the second proportional coefficient between Hs and the total radiant heat H of the light source 11.

[0067] From formula (1) and (2), we can get:

[0068] U=k·k s ·H

[0069] =K·H (3)

[0070] In formula (3), K represents the third proportional coefficient between the output signal U of the photothermal sensor and the total radiation heat H of the light source 11, K=k·k s .

[0071] Similarly, if the spectral energy distribution of the metal halide lamp is stable, then the radiant heat H in the full spectrum is i It is proportional to the total radiation heat H of the light source, that is:

[0072] H i =k i ·H(i=1,2,3L L) (4)

[0073] In formula (4), k iIndicates the radiant heat H in the full spectrum i The fourth proportional coefficient between the total radiant heat H of the light source.

[0074] From formula (3) and (4), we can get:

[0075]

[0076] In formula (5), a i Represents the output signal U of the photothermal sensor and the radiation heat H in the full spectrum i The fifth proportional coefficient between .

[0077] In addition, the radiant heat H in the full spectrum i It is necessarily proportional to the total irradiance E, that is:

[0078] H i =b i ·E(i=1,2,3L L) (6)

[0079] In formula (6), b i Indicates the radiant heat H in the full spectrum i The sixth proportional coefficient between the irradiance E corresponding to the light source.

[0080] From formula (5) and (6), we can get:

[0081] U=a i b i ·E(i=1,2,3L L) (7)

[0082] From formula (7), we can get:

[0083]

[0084] In formula (8), K i It represents the target proportional coefficient between the irradiance E corresponding to the light source and the output signal U of the photothermal sensor in the i-th measurement band. Formula (8) is the preset relationship formula provided in this application.

[0085] It can be seen from formula (8) that the irradiance E corresponding to the light source is proportional to the output signal U of the photothermal sensor. This proportional relationship is based on an important premise, that is, the spectral energy distribution of the light source is stable and unchanged. Metal halide lamps have the above characteristics. The continuous spectrum in the spectral energy distribution of metal halide lamps is very strong, and the spectral energy distribution of the continuous spectrum part is almost independent of the power. In addition, the spectral energy distribution of metal halide lamps is almost unchanged during their service life. Therefore, within the allowable error range, as long as the target proportional coefficient K corresponding to each metering band is determined iAccording to the output signal U of the photothermal sensor, the irradiance Ei of the light source in each measurement band can be calculated, and the target proportional coefficient K i It can be determined in advance based on the calibration adjustment value of an authoritative metrology certification agency.

[0086] It can be seen that it is feasible to receive 300nm-3000nm light radiation energy through photothermal sensors, convert it into thermal energy signals and then into circuit resistance signals to characterize and monitor the irradiance of metal halide lamp aging test chambers.

[0087] In the present application, the corresponding target proportionality coefficient is determined according to the wavelength band to which the light source belongs, and the target proportionality coefficient and the target potential difference corresponding to the preset time period are substituted into the above formula (8), and the corresponding irradiance of the light source can be obtained.

[0088] In a preferred embodiment, the spectral irradiance monitoring and control system further includes a power regulating rectifier.

[0089] See also Figure 4 , Figure 4 FIG2 shows a second interactive schematic diagram of a full-spectrum irradiance monitoring and control system provided by an embodiment of the present application. Figure 4 As shown, the PLC controller also performs:

[0090] S300: Convert the received target analog signal into a corresponding target digital signal.

[0091] S301 : Compare a target digital signal with a preset standard digital signal to determine a target signal difference between the target digital signal and the preset standard digital signal.

[0092] S302: Determine a radiation control signal for the light source according to the target signal difference.

[0093] S303: Send the radiation control signal and the target signal difference to a power regulating rectifier.

[0094] Power conditioning rectifier 4 performs:

[0095] S400: Determine a target output power for the light source according to the radiation control signal, the target signal difference and a preset adjustment strategy.

[0096] S401. Output the target output power to the light source, so that the light source works under the target output power.

[0097] In the present application, the photothermal sensor receives the light irradiation signal and converts it into a heat signal, and then converts the heat signal into an electrical signal through a signal processing circuit, which is then input into a PLC controller for further signal processing, and the electrical signal is parsed into a target digital signal, and compared with a preset standard digital signal. After comparing the target digital signal with the preset standard digital signal, a target signal difference between the two is obtained, and the PLC controller judges and processes the target signal difference, generates a corresponding radiation control signal and sends it to a power regulating rectifier, and then further adjusts the power of the metal halide lamp through the power regulating rectifier, so that the target digital signal monitored in real time is finally consistent with the set value. This process forms a self-consistent control logic for the working power of the metal halide lamp, and a control closed loop is formed between steps S300 and S401 to realize irradiance control of the metal halide lamp.

[0098] The radiation control signal includes a positive electrical signal and a negative electrical signal. In a preferred embodiment, the PLC controller determines the radiation control signal in the following manner:

[0099] A1. If the target signal difference is a negative number, a positive electrical signal is generated and sent to the power regulating rectifier.

[0100] A2. If the target signal difference is a positive number, a negative electrical signal is generated and sent to the power regulating rectifier.

[0101] Return and reacquire the target analog signal, and repeat steps A1 to A2 until the target digital signal is consistent with the preset standard digital signal.

[0102] Specifically, after comparing the target digital signal with the preset standard value digital signal, the target signal difference is obtained, and the PLC controller judges and processes the target signal difference. If the target signal difference is a negative number, it indicates that the target digital signal is smaller than the preset standard digital signal. At this time, the PLC controller generates a positive electrical signal and outputs it to the power regulating rectifier. The power regulating rectifier increases the power of the metal halide lamp according to the preset adjustment strategy and re-acquires the target digital signal. If the target signal difference is a positive number, it indicates that the target digital signal is greater than the preset standard digital signal. At this time, the PLC controller generates a negative electrical signal and outputs it to the power regulating rectifier. The power regulating rectifier reduces the power of the metal halide lamp according to the preset adjustment strategy. After the adjustment is completed, the target digital signal is re-acquired, and steps A1 to A2 are executed until the target digital signal received in real time is consistent with the preset standard value digital signal.

[0103] In another preferred embodiment, the preset adjustment strategy includes:

[0104] Obtain a preset power gear adjustment table, which describes the mapping relationship between multiple signal differences and multiple adjustment powers, find the target adjustment power corresponding to the target signal difference from the preset power gear adjustment table, and determine the target output power for the light source according to the target adjustment power.

[0105] In the present application, a power level adjustment table can be pre-created in a step-by-step manner. Specifically, the larger the signal difference, the larger the corresponding adjustment power. This allows the received target digital signal to be more quickly consistent with the preset standard value digital signal. In addition, after determining the target adjustment power, if the signal difference is a negative value, the target adjustment power is increased on the basis of the current power corresponding to the light source to obtain the target output power corresponding to the light source. If the signal difference is a positive value, the target adjustment power is reduced on the basis of the current power corresponding to the light source to obtain the target output power corresponding to the light source. The target output power is output to the light source to achieve adjustment and control of the radiant illumination of the light source.

[0106] In a preferred embodiment, the spectral irradiance monitoring and control system further includes a display device, the PLC controller sends the irradiance corresponding to the light source to the display device, and the display device displays the irradiance corresponding to the light source in real time.

[0107] Specifically, the display device includes a human-machine interface touch screen, and the display device displays the irradiance corresponding to the light source in real time for the user to observe and record.

[0108] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. In the several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0109] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0110] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0111] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0112] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A full spectrum irradiance monitoring and control method, characterized in that: Applied to full spectrum irradiance monitoring and control system, the spectrum irradiance monitoring and control system includes a light source aging test box, a photothermal sensor and a PLC controller, the photothermal sensor is placed in the light source aging test box and is placed opposite to the light source in the light source aging test box. Wherein, the method comprises: The photothermal sensor receives a first light irradiation signal from the light source, performs heat conversion on the first light irradiation signal to obtain first heat characterization data, and sends the first heat characterization data to the PLC controller; The photothermal sensor receives a second light irradiation signal from the light source after a preset time period, performs heat conversion on the second light irradiation signal to obtain second heat characterization data, and sends the second heat characterization data to the PLC controller; The PLC controller calculates the heat difference between the first heat characterization data and the second heat characterization data, determines the radiation energy value generated by the light source within a preset time period, and determines the irradiance corresponding to the light source based on the radiation energy value.

2. The method according to claim 1, characterized in that The photothermal sensor includes a quartz glass cover, a black body temperature sensor, a signal processing circuit, a fully enclosed sensor housing and a photothermal signal output component. The quartz glass cover is enclosed on the fully enclosed sensor housing. The black body temperature sensor, the signal processing circuit and the photothermal signal output component are located in the fully enclosed sensor housing. The thermal characterization data includes a temperature signal, a resistance signal and an analog signal. Wherein, the method further comprises: The black body temperature sensor receives the first light irradiation signal through the quartz glass cover and converts the first light irradiation signal into a first target temperature signal; The blackbody temperature sensor searches a temperature-resistance comparison table to determine a first target resistance signal corresponding to the first target temperature signal, and transmits the first target resistance signal to the signal processing circuit, wherein the temperature-resistance comparison table includes a mapping relationship between a plurality of temperature signals and a plurality of resistance signals; The signal processing circuit converts the first target resistance signal into a corresponding first target analog signal, and sends the first target analog signal to the PLC controller through the optical thermal signal output component and the optical fiber in sequence; The black body temperature sensor receives the second light irradiation signal through the quartz glass cover and converts the second light irradiation signal into a second target temperature signal; The blackbody temperature sensor searches the temperature-resistance comparison table to determine a second target resistance signal corresponding to the second target temperature signal, and transmits the second target resistance signal to the signal processing circuit; The signal processing circuit converts the second target resistance signal into a corresponding second target analog signal, and sends the second target analog signal to the PLC controller through the photothermal signal output component and the optical fiber in sequence.

3. The method according to claim 2, characterized in that The PLC controller determines the irradiance corresponding to the light source in the following manner: determining a target potential difference corresponding to a preset time period according to a difference between the second target analog signal and the first target analog signal; The irradiance corresponding to the light source is determined according to a preset relationship formula and the target potential difference.

4. The method according to claim 2, characterized in that: The spectral irradiance monitoring and control system also includes a power regulating rectifier, Wherein, the method further comprises: The PLC controller converts the received target analog signal into a corresponding target digital signal, compares the target digital signal with a preset standard digital signal, determines a target signal difference between the target digital signal and the preset standard digital signal, determines a radiation control signal for the light source according to the target signal difference, and sends the radiation control signal and the target signal difference to the power regulating rectifier; The power regulating rectifier determines the target output power for the light source according to the radiation control signal, the target signal difference and the preset regulation strategy, and outputs the target output power to the light source so that the light source works under the target output power.

5. The method according to claim 4, characterized in that The radiation control signal includes a positive electrical signal and a negative electrical signal. Wherein, the PLC controller determines the radiation control signal in the following manner: A1. If the target signal difference is a negative number, a positive electrical signal is generated and sent to the power regulating rectifier; A2. If the target signal difference is a positive number, a negative electrical signal is generated and sent to the power regulating rectifier; Repeat steps A1 to A2 until the target digital signal is consistent with the preset standard digital signal.

6. The method according to claim 4, characterized in that The preset adjustment strategy includes: Obtaining a preset power gear adjustment table, wherein the preset power gear adjustment table describes a mapping relationship between a plurality of signal differences and a plurality of adjustment powers; Searching the target adjustment power corresponding to the target signal difference from the preset power gear adjustment table; The target output power for the light source is determined according to the target adjustment power.

7. The method according to claim 1, characterized in that The spectral irradiance monitoring and control system further includes a display device, The method further comprises: The PLC controller sends the irradiance corresponding to the light source to the display device; The display device displays the irradiance corresponding to the light source in real time.

8. A full spectrum irradiance monitoring and control system, characterized in that: The full-spectrum irradiance monitoring and control system comprises a light source aging test box, a photothermal sensor and a PLC controller. The photothermal sensor is placed in the light source aging test box and is placed directly opposite to the light source in the light source aging test box. The photothermal sensor receives a first light irradiation signal from the light source, performs heat conversion on the first light irradiation signal to obtain first heat characterization data, and sends the first heat characterization data to the PLC controller; The photothermal sensor receives a second light irradiation signal from the light source after a preset time period, performs heat conversion on the second light irradiation signal to obtain second heat characterization data, and sends the second heat characterization data to the PLC controller; The PLC controller calculates the heat difference between the first heat characterization data and the second heat characterization data, determines the radiation energy value generated by the light source within a preset time period, and determines the irradiance corresponding to the light source based on the radiation energy value.

9. The full spectrum irradiance monitoring and control system according to claim 8, characterized in that: The photothermal sensor includes a quartz glass cover, a black body temperature sensor, a signal processing circuit, a fully enclosed sensor housing and a photothermal signal output component. The quartz glass cover is enclosed on the fully enclosed sensor housing. The black body temperature sensor, the signal processing circuit and the photothermal signal output component are located in the fully enclosed sensor housing. The thermal characterization data includes a temperature signal, a resistance signal and an analog signal. The black body temperature sensor receives the first light irradiation signal through the quartz glass cover and converts the first light irradiation signal into a first target temperature signal; The blackbody temperature sensor searches a temperature-resistance comparison table to determine a first target resistance signal corresponding to the first target temperature signal, and transmits the first target resistance signal to the signal processing circuit, wherein the preset temperature-resistance comparison table includes a mapping relationship between a plurality of temperature signals and a plurality of resistance signals; The signal processing circuit converts the first target resistance signal into a corresponding first target analog signal, and sends the first target analog signal to the PLC controller via an optical fiber; The black body temperature sensor receives the second light irradiation signal through the quartz glass cover and converts the second light irradiation signal into a second target temperature signal; The blackbody temperature sensor searches the temperature-resistance comparison table to determine a second target resistance signal corresponding to the second target temperature signal, and transmits the second target resistance signal to the signal processing circuit; The signal processing circuit converts the second target resistance signal into a corresponding second target analog signal, and sends the second target analog signal to the PLC controller via an optical fiber.

10. The spectral irradiance monitoring and control system according to claim 8, characterized in that: The spectral irradiance monitoring and control system also includes a power regulating rectifier, The PLC controller converts the received target analog signal into a corresponding target digital signal, compares the target digital signal with a preset standard digital signal, determines a target signal difference between the target digital signal and the preset standard digital signal, determines a radiation control signal for the light source according to the target signal difference, and sends the radiation control signal and the target signal difference to the power regulating rectifier; The power regulating rectifier determines the target output power for the light source according to the radiation control signal, the target signal difference and the preset regulation strategy, and outputs the target output power to the light source so that the light source works under the target output power.

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