Device and method for measuring and evaluating hidden parameters of underwater ecological sensors

Abstract

The present invention discloses a device and method for measuring and evaluating hidden parameters of underwater ecological sensors, and belongs to the field of sensor detection technology. The device is composed of a housing, an excitation light collection module, a fluorescence simulation module and a PC control module; a slit is provided at one end of the housing to allow the excitation light of the sensor to be tested to enter the housing; the excitation light collection module is arranged in the housing to collect the excitation light of the sensor to be tested; the fluorescence simulation module is arranged in the housing to simulate the excitation light of the sensor to be tested; the excitation light collection module and the fluorescence simulation module are both electrically connected to the PC control module. The device and method for measuring and evaluating hidden parameters of underwater ecological sensors provided by the present invention can quickly measure the hidden parameters that are not disclosed by underwater ecological sensor manufacturers without disassembling the sensor, and effectively help users to have a deep understanding of the performance and detailed parameters of the sensor.

Description

Technical Field

[0001] The present invention belongs to the technical field of sensor detection, and in particular relates to a device and method for measuring and evaluating hidden parameters of an underwater ecological sensor. Background Art

[0002] Today, marine pollution is becoming more and more serious, and people are more and more urgent to realize rapid in-situ monitoring of the marine environment. Using ships or buoys to carry in-situ ecological sensors such as chlorophyll fluorometers, backscatter meters, oil in water sensors, suspended particle sensors, etc. to monitor the marine water environment is a common means of marine pollution monitoring. At present, underwater ecological sensors of imported brands (such as Seabird, Andra, etc.) have a high degree of recognition and application in the domestic market. Such sensors are accompanied by calibration documents and user manuals when they leave the factory, but the manufacturer does not provide parameters such as LED spectral distribution, modulation frequency, number of single-cycle pulses, excitation light intensity, spectral range of the receiving system, sensitivity, etc., which leads to problems encountered by users in the process of using the sensor and cannot be explained. For example, it was found in actual applications that the Seabird ECO-FLBB (5543) sensor has the phenomenon of DC saturation in bright field without direct sunlight. At the same time, the calibration data provided by the manufacturer is also quite different from the calibration data issued by domestic institutions with calibration qualifications. Moreover, due to differences in incident light angles, excitation light wavelengths, filter bandwidths, filter center wavelengths, photodetector sensitivities, etc., sensors from different manufacturers and models may also have significantly different measurement results in the same application scenario.

[0003] At present, there is no related report that can quickly and non-destructively measure the excitation light parameters of the sensor, such as the excitation light spectrum, relative intensity of the excitation light, excitation light modulation waveform, excitation light modulation frequency, number of pulses in a single cycle, as well as the transmission spectrum, receiving sensitivity, noise suppression spectrum, DC background light saturation intensity and other parameters without disassembling the sensor.

[0004] Therefore, a device and method for measuring and evaluating hidden parameters of underwater ecological sensors are needed, which can quickly and non-destructively measure the hidden parameters of the sensor without disassembling the sensor, and provide an evaluation method and basis for similar sensors of different manufacturers and models. Summary of the invention

[0005] In view of the deficiencies existing in the related art, the purpose of the present invention is to provide a device and method for measuring and evaluating hidden parameters of an underwater ecological sensor to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A device for measuring and evaluating hidden parameters of underwater ecological sensors, comprising:

[0008] A housing, one end of which is provided with a slit to allow the excitation light of the sensor to be tested to enter the housing;

[0009] An excitation light collection module is arranged in the housing, and the excitation light collection module includes a scanning Fabry-Perot interferometer, which is arranged behind the slit of the housing, and an optical fiber is arranged between the slit and the scanning Fabry-Perot interferometer, and the scanning Fabry-Perot interferometer is used to perform wavelength scanning on the excitation light of the sensor to be tested and complete dispersion, and the scanning Fabry-Perot interferometer includes a photodetector, and the photodetector is used to collect the dispersed light and convert it into an electrical signal;

[0010] A fluorescence simulation module is arranged in the housing and in front of the excitation light collection module. The fluorescence simulation module includes a multi-wavelength LED array. The multi-wavelength LED array is arranged circumferentially with the slit of the housing as the center. The multi-wavelength LED array is used to simulate the excitation light of the sensor to be tested.

[0011] The PC control module, the excitation light collection module and the fluorescence simulation module are all electrically connected to the PC control module. The PC control module is used to receive output data of the excitation light collection module and the fluorescence simulation module. The PC control module includes a drawing unit, which is used to draw a curve of the output data.

[0012] In some embodiments, one end of the housing having the slit is the front end, and the other end is the rear end of the housing, and the excitation light collection module further includes:

[0013] A collimator mirror is arranged at the front end of the housing and is located between the slit of the housing and the scanning Fabry-Perot interferometer. The collimator mirror is used to collimate the excitation light of the sensor to be tested;

[0014] The control circuit is arranged beside the scanning Fabry-Perot interferometer. The scanning Fabry-Perot interferometer and the photoelectric detector are both electrically connected to the control circuit. The control circuit is electrically connected to the PC control module.

[0015] In some embodiments, the fluorescence simulation module further comprises:

[0016] A continuous filter is arranged at the front end of the housing and in front of the multi-wavelength LED array, so that the light emitted by the multi-wavelength LED array passes through the continuous filter to change the light intensity. A hole is opened in the middle of the continuous filter to adapt to the slit of the housing;

[0017] A micro-stepping motor, wherein the output shaft of the micro-stepping motor is connected to the continuous optical filter, and the micro-stepping motor is used to drive the continuous optical filter to rotate;

[0018] The driving circuit is arranged beside the scanning Fabry-Perot interferometer. The driving circuit includes an LED driving circuit and a motor driving circuit, which are electrically connected to the multi-wavelength LED array and the micro-stepping motor respectively. The LED driving circuit is used to control the lighting of the multi-wavelength LED array, and the motor driving circuit is used to drive the micro-stepping motor. The driving circuit is electrically connected to the PC control module.

[0019] In some of the embodiments, a first gear and a second gear are provided between the micro stepper motor and the continuous filter, the output shaft of the micro stepper motor is connected to the inner hole of the gear of the first gear, the continuous filter is connected to the second gear, and the second gear is meshed with the first gear.

[0020] In some of the embodiments, the underwater ecological sensor hidden parameter measurement and evaluation device also includes a bearing, which is arranged between the continuous filter and the second gear to reduce friction.

[0021] In some of the embodiments, the underwater ecological sensor hidden parameter measurement and evaluation device also includes an aperture, which is arranged at the slit of the shell and coaxially arranged with the collimating mirror to limit the light beam size when the excitation light of the sensor to be tested is incident.

[0022] In some of the embodiments, an electrical connector is provided at the rear end of the housing, which is electrically connected to the control circuit and the drive circuit, and the electrical connector is used to connect to an external power source.

[0023] In some of these embodiments, the underwater ecological sensor hidden parameter measurement and evaluation device further includes a bottom plate, a sensor mounting bracket, and a longitudinal translation stage;

[0024] The sensor mounting bracket is arranged on the bottom plate and is used to fix the sensor to be tested;

[0025] The longitudinal translation platform is arranged on the bottom plate and is located at one side of the sensor mounting bracket. The shell is connected to the longitudinal translation platform through a clamp, and the clamp is slidably connected to the longitudinal translation platform to adjust the position of the shell.

[0026] In some embodiments, the sensor mounting bracket includes:

[0027] A lateral translation stage is arranged on the bottom plate;

[0028] An optical turntable is arranged on the transverse translation stage, and is used to adjust the horizontal angle of the sensor to be tested. The optical turntable is slidably connected to the transverse translation stage to adjust the position of the sensor to be tested on the bottom plate;

[0029] The adjustable sensor mounting platform is fixedly connected to the optical turntable. The adjustable sensor mounting platform comprises a fixing piece and an adjusting screw connected to the fixing piece, and is used for fixing sensors of different sizes.

[0030] A method for measuring and evaluating hidden parameters of underwater ecological sensors, using any of the above-mentioned devices for measuring and evaluating hidden parameters of underwater ecological sensors, comprises the following steps:

[0031] Fixing and adjustment steps: fix the sensor to be tested on the sensor mounting bracket, turn on the sensor to be tested, and adjust the longitudinal translation stage, the transverse translation stage and the optical turntable so that the light spot of the excitation light of the sensor to be tested is vertically irradiated on the slit of the housing;

[0032] Excitation light collection step: the control circuit controls the scanning Fabry-Perot interferometer to scan the wavelength of the excitation light of the sensor to be tested and complete the dispersion, and at the same time, the control circuit controls the photodetector to collect the dispersed light and convert it into an electrical signal to be transmitted to the PC control module;

[0033] Excitation light parameter measurement steps: set the scanning Fabry-Perot interferometer to stay at the position of the central wavelength of the excitation light through the PC control module, and then measure the pulse frequency, pulse shape, single-cycle pulse number and relative light intensity of the excitation light modulation by scanning the Fabry-Perot interferometer for multiple times;

[0034] Fluorescence simulation step: adjust the angle of the sensor to be tested so that the incident window of the sensor to be tested is perpendicular to the slit of the housing, and then set the pulse frequency, pulse shape, number of pulses in a single cycle and relative light intensity parameters of the excitation light modulation measured in the excitation light parameter measurement step through the PC control module, control the multi-wavelength LED array to light up one by one through the LED driving circuit, illuminate the incident window of the sensor to be tested one by one with the same waveform and frequency as the excitation light, and input the output data of the sensor to be tested into the PC control module;

[0035] Curve drawing and data acquisition steps: draw a curve of wavelength and output data of the sensor to be tested through the drawing unit of the PC control module to obtain the receiving spectrum of the incident window of the sensor to be tested; control the LED corresponding to a certain band in the receiving spectrum to be lit through the LED driving circuit, control the micro stepping motor to rotate the continuous filter through the motor driving circuit to change the light intensity, input the output data of the sensor to be tested at this time into the PC control module, and the drawing unit draws a curve of attenuation coefficient and output data of the sensor to be tested to obtain the receiving sensitivity of the sensor to be tested in this band; control the multi-wavelength LED array through the LED driving circuit to perform frequency scanning with the sensor excitation light modulation frequency as the center frequency, draw a curve of modulation frequency and sensor output data, and obtain the response characteristics of the sensor to noise of different frequencies.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The underwater ecological sensor hidden parameter measurement and evaluation device provided by the present invention is composed of a housing, an excitation light collection module, a fluorescence simulation module and a PC control module. The device can quickly measure the hidden parameters that are not disclosed by the underwater ecological sensor manufacturer without disassembling the device, effectively helping users to deeply understand the performance and detailed parameters of the sensor, and providing an evaluation method and basis for similar sensors of different manufacturers and models;

[0038] 2. The underwater ecological sensor hidden parameter measurement and evaluation device provided by the present invention can obtain the sensor's ability to suppress the noise of the frequency by controlling the LED to work at a specific frequency, which is conducive to the targeted development of noise suppression algorithms for sensors in specific application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a device for measuring and evaluating hidden parameters of an underwater ecological sensor according to the present invention;

[0041] Figure 2 It is a schematic cross-sectional diagram of the internal structure of an embodiment of the underwater ecological sensor hidden parameter measurement and evaluation device of the present invention;

[0042] Figure 3 It is a schematic diagram of the internal structure of an embodiment of the underwater ecological sensor hidden parameter measurement and evaluation device of the present invention;

[0043] Figure 4 The present invention is a block diagram of the design principles of an embodiment of the underwater ecological sensor hidden parameter measurement and evaluation device of the present invention.

[0044] In the figure:

[0045] 1. Shell; 2. Excitation light collection module; 3. Fluorescence simulation module; 4. PC control module; 5. Collimator; 6. Scanning Fabry-Perot interferometer; 7. Optical fiber; 8. Photodetector; 9. Control circuit; 10. Multi-wavelength LED array; 11. Continuous filter; 12. Micro stepping motor; 13. Driving circuit; 14. Bottom plate; 15. Sensor mounting bracket; 16. Longitudinal translation stage; 17. Clamp; 18. First gear; 19. Second gear; 20. Bearing; 21. Aperture; 22. Sensor to be tested; 23. Electrical connector; 51. Lateral translation stage; 52. Optical turntable; 53. Adjustable sensor mounting platform; 531. Fixing piece; 532. Adjusting screw. DETAILED DESCRIPTION

[0046] 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. 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 making creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Embodiment 1:

[0050] See attached Figures 1 to 4 , a schematic embodiment of the underwater ecological sensor hidden parameter measurement and evaluation device proposed in the present invention is given, and the underwater ecological sensor hidden parameter measurement and evaluation device includes a shell 1, an excitation light collection module 2, a fluorescence simulation module 3 and a PC control module 4.

[0051] A slit is provided at one end of the housing 1 so that the excitation light of the sensor to be tested can enter the housing 1 through the slit. An iris 21 is also provided at the slit of the housing 1, which is coaxially arranged with the collimator 5 to limit the size of the light beam when the excitation light of the sensor to be tested is incident. The iris 21 is a variable aperture iris, which is provided with an iris adjustment rod and an adjustment rod driving assembly. The iris adjustment rod is used to adjust the aperture size of the iris 21, and the adjustment rod driving assembly is used to drive the iris adjustment rod to rotate along the circumference of the iris 21 to adjust the aperture size of the iris 21. One end with a slit is the front end of the shell 1, and the other end is the rear end of the shell 1. The rear end of the shell 1 is provided with an electrical connector 23 for connecting an external power supply; the excitation light collection module 2 and the fluorescence simulation module 3 are both arranged in the shell 1, and the shell 1 has a certain protective effect on the excitation light collection module 2 and the fluorescence simulation module 3; the excitation light collection module 2 is used to collect the excitation light of the sensor to be tested; the fluorescence simulation module 3 is used to simulate the excitation light of the sensor to be tested; the excitation light collection module 2 and the fluorescence simulation module 3 are both electrically connected to the PC control module 4, the PC control module 4 is used to receive the output data of the excitation light collection module 2 and the fluorescence simulation module 3, and the PC control module 4 includes a drawing unit, and the drawing unit is used to draw a curve of the output data.

[0052] The excitation light collection module 2 includes a collimator 5, a scanning Fabry-Perot interferometer 6 and a control circuit 9. The collimator 5 is arranged at the front end of the housing 1, and the collimator 5 plays a role in making the laser focusing effect better. The scanning Fabry-Perot interferometer 6 is arranged behind the collimator 5, and an optical fiber 7 is arranged between the collimator 5 and the scanning Fabry-Perot interferometer 6. The scanning Fabry-Perot interferometer 6 includes a photodetector 8. The control circuit 9 is arranged beside the scanning Fabry-Perot interferometer 6, and the control circuit 9 is electrically connected to the PC control module 4. The scanning Fabry-Perot interferometer 6 and the photodetector 8 are both electrically connected to the control circuit 9. The control circuit 9 can control the scanning Fabry-Perot interferometer 6 and the photodetector 8 to work, so that the scanning Fabry-Perot interferometer 6 scans the wavelength of the excitation light, and the photodetector 8 collects the dispersed light, and converts the optical signal into an electrical signal and transmits it to the PC control module 4, so as to obtain the excitation light spectrum signal.

[0053] The fluorescence simulation module 3 includes a multi-wavelength LED array 10, a continuous filter 11, a micro-stepping motor 12 and a driving circuit 13. The multi-wavelength LED array 10 is arranged at the front end of the housing 1, and the multi-wavelength LED array 10 includes LEDs with wavelengths of 625nm, 630nm, 635nm, 645nm, 660nm, 670nm, 680nm, 690nm, 700nm, 720nm, 730nm, 735nm and 740nm. The continuous filter 11 is arranged in front of the multi-wavelength LED array 10 so that the multi-wavelength LED array 10 can change the light intensity through the continuous filter 11 when irradiating. The micro-stepping motor 12 is arranged at the front end of the housing 1, and the micro-stepping motor 12 is used to convert the electrical pulse signal into an angular displacement to control the rotation of the continuous filter 11. A first gear 18 and a second gear 19 are provided between the micro-stepping motor 12 and the continuous filter 11. The output shaft of the micro-stepping motor 12 is connected to the inner hole of the gear of the first gear 18. The continuous filter 11 is connected to the second gear 19. The second gear 19 is meshed with the first gear 18. The gear transmission has high transmission accuracy and stable and reliable operation. A bearing 20 is also provided between the continuous filter 11 and the second gear 19 to reduce friction. The driving circuit 13 is arranged beside the scanning Fabry-Perot interferometer 6. The driving circuit 13 includes an LED driving circuit and a motor driving circuit, which are electrically connected to the multi-wavelength LED array 10 and the micro-stepping motor 12 respectively. The LED driving circuit is used to control the lighting of the multi-wavelength LED array 10. The motor driving circuit is used to drive the micro-stepping motor 12. The driving circuit 13 is electrically connected to the PC control module 4. The multi-wavelength LED array 10 is lit up one by one, and the incident window of the sensor 22 to be tested is illuminated one by one with the same waveform and frequency as the excitation light, and a curve of wavelength and output data of the sensor 22 to be tested is plotted to obtain the receiving spectrum of the incident window of the sensor 22 to be tested. The LED driving circuit controls the LEDs in the multi-wavelength LED array 10 with the same central wavelength as the excitation light to perform frequency scanning with the modulation frequency of the sensor excitation light as the central frequency, and a curve of modulation frequency and output data of the sensor 22 to be tested is plotted to obtain the response characteristics of the sensor 22 to noises of different frequencies, which is conducive to the targeted development of noise suppression algorithms for sensors in specific application scenarios.

[0054] The underwater ecological sensor hidden parameter measurement and evaluation device provided in this embodiment also includes a bottom plate 14, a sensor mounting bracket 15 and a longitudinal translation stage 16. The sensor mounting bracket 15 is arranged on the bottom plate 14 and is used to fix the sensor 22 to be tested; the longitudinal translation stage 16 is arranged on the bottom plate 14 and is located on one side of the sensor mounting bracket 15. The housing 1 is connected to the longitudinal translation stage 16 through a clamp 17, and the clamp 17 is slidably connected to the longitudinal translation stage 16 to adjust the position of the housing 1. The sensor mounting bracket 15 includes a transverse translation stage 51, an optical turntable 52 and an adjustable sensor mounting table 53. The transverse translation stage 51 is arranged on the bottom plate 14. The optical turntable 52 is arranged on the transverse translation stage 51. The optical turntable 52 is a rotatable workbench equipped with an angle reference and an optical reading system, which has the advantages of high precision, zero jitter and low friction coefficient. The optical turntable 52 is used to adjust the horizontal angle of the sensor 22 to be tested, and includes a coarse adjustment knob, a fine adjustment knob and a locking screw. The optical turntable 52 is slidably connected to the lateral translation stage 51 to adjust the position of the sensor 22 to be tested on the bottom plate 14; the adjustable sensor mounting platform 53 is fixedly connected to the optical turntable 52, and the adjustable sensor mounting platform 53 includes a fixing member 531 and an adjusting screw 532 connected to the fixing member 531 to fix sensors of different sizes. When in use, the sensor to be tested is placed on the fixing member 531, and then the adjusting screw 532 is rotated to fix the sensor to be tested; the adjusting screw 532 can be rotated to adjust the distance between it and the fixing member 531, so it can be suitable for sensors of different sizes. After the sensor 22 to be tested is fixed, the exit window of the sensor 22 to be tested is roughly aligned with the slit of the housing 1 by adjusting the lateral translation stage 51 and the longitudinal translation stage 16, then the sensor 22 to be tested is turned on, and the coarse adjustment knob of the optical turntable 52 is adjusted to make the sensor excitation light roughly aligned with the slit of the housing 1, and then the fine adjustment knob of the optical turntable 52 is adjusted to make the light spot of the excitation light of the sensor to be tested vertically illuminate the slit of the housing 1, and then the locking screw of the optical turntable 52 is tightened.

[0055] The multi-wavelength LED array 10 and the scanning Fabry-Perot interferometer 6 in the underwater ecological sensor hidden parameter measurement and evaluation device provided in this embodiment can be replaced with different models to make the device suitable for underwater ecological sensors based on fluorescence or scattered light, such as CDOM, FDOM, oil in water sensor, turbidity meter, backscatter meter, etc.

[0056] In the above-mentioned exemplary embodiment, the underwater ecological sensor hidden parameter measurement and evaluation device can quickly measure the hidden parameters that are not disclosed by the underwater ecological sensor manufacturer without disassembling the sensor, effectively helping users to analyze and solve problems when they encounter problems during the use of the sensor.

[0057] The following is combined with Figures 1 to 4The working process of the underwater ecological sensor hidden parameter measurement and evaluation device provided in this embodiment is described as follows:

[0058] First, fix the sensor 22 to be tested on the sensor mounting bracket 15, place the sensor 22 to be tested on the fixing part 531, turn the adjusting screw 532 to fix the sensor 22 to be tested on the fixing part 531, then turn on the sensor 22 to be tested, and adjust the longitudinal translation stage 16, the transverse translation stage 51 and the optical turntable 52 so that the light spot of the excitation light of the sensor to be tested is vertically irradiated on the slit of the housing 1; then control the scanning Fabry-Perot interferometer 6 through the control circuit 9 to scan the wavelength of the excitation light of the sensor to be tested and complete the dispersion, and at the same time control the photodetector 8 through the control circuit 9 to collect the dispersed light and convert it into an electrical signal for transmission to the PC control module 4. Since the excitation light is pulsed light, this step needs to be repeated many times to obtain a complete excitation light spectrum signal; then set the scanning Fabry-Perot interferometer 6 to stay at the position of the central wavelength of the excitation light through the PC control module 4, and at this time, measure the pulse frequency, pulse shape, number of single-cycle pulses and relative light intensity of the excitation light modulation multiple times.

[0059] The angle of the sensor 22 to be tested is adjusted so that the incident window of the sensor 22 to be tested is perpendicular to the slit of the housing 1, and then the pulse frequency, pulse shape, number of pulses in a single cycle and relative light intensity parameters of the excitation light modulation obtained by the above measurement are set through the PC control module 4, and the multi-wavelength LED array 10 is controlled by the LED driving circuit to be lit up one by one, and the incident window of the sensor 22 to be tested is irradiated one by one with the same waveform and frequency as the excitation light, and the output data of the sensor 22 to be tested is input into the PC control module 4; the drawing unit of the PC control module 4 draws a curve between the wavelength and the output data of the sensor to be tested to obtain the receiving spectrum of the incident window of the sensor to be tested; then the LED driving circuit controls the lighting of the LED corresponding to a certain band in the receiving spectrum, and the motor driving circuit controls the micro-stepping motor 12 to rotate the continuous filter 11 to change the light intensity, and the output data of the sensor 22 to be tested at this time is input into the PC control module 4, and the drawing unit draws a curve between the attenuation coefficient and the output data of the sensor to be tested to obtain the receiving sensitivity of the sensor 22 to be tested in this band. Finally, the LED driving circuit controls the multi-wavelength LED array 10 to perform frequency scanning with the sensor excitation light modulation frequency as the center frequency, and a curve between the modulation frequency and the output data of the sensor to be tested is plotted to obtain the response characteristics of the sensor to be tested 22 to noises of different frequencies.

[0060] Embodiment 2:

[0061] This embodiment provides a method for measuring and evaluating hidden parameters of underwater ecological sensors, using the device for measuring and evaluating hidden parameters of underwater ecological sensors described in Embodiment 1, and comprising the following steps:

[0062] Fixing and adjusting step: fix the sensor 22 to be tested on the sensor mounting bracket 15, turn on the sensor 22 to be tested, and coordinate and adjust the longitudinal translation stage 16, the transverse translation stage 51 and the optical turntable 52 so that the spot of the excitation light of the sensor to be tested is vertically irradiated on the slit of the housing 1;

[0063] Excitation light collection step: control the scanning Fabry-Perot interferometer 6 through the control circuit 9 to scan the wavelength of the excitation light of the sensor to be tested and complete the dispersion, and at the same time control the photodetector 8 through the control circuit 9 to collect the dispersed light and convert it into an electrical signal to be transmitted to the PC control module 4. This step needs to be repeated multiple times to obtain a complete excitation light spectrum signal;

[0064] Excitation light parameter measurement steps: setting the scanning Fabry-Perot interferometer 6 to stay at the position of the central wavelength of the excitation light through the PC control module 4, and then repeatedly measuring the pulse frequency, pulse shape, single-cycle pulse number and relative light intensity of the excitation light modulation through the scanning Fabry-Perot interferometer 6;

[0065] Fluorescence simulation step: adjust the angle of the sensor 22 to be tested so that the incident window of the sensor 22 to be tested is perpendicular to the slit of the housing 1, and then set the pulse frequency, pulse shape, number of pulses in a single cycle and relative light intensity parameters of the excitation light modulation measured in the excitation light parameter measurement step through the PC control module 4, control the multi-wavelength LED array 10 to light up one by one through the LED driving circuit, illuminate the incident window of the sensor 22 to be tested one by one with the same waveform and frequency as the excitation light, and input the output data of the sensor 22 to be tested into the PC control module 4;

[0066] Curve drawing and data acquisition steps: draw a curve of wavelength and output data of the sensor to be tested through the drawing unit of the PC control module 4 to obtain the receiving spectrum of the incident window of the sensor to be tested; control the LED corresponding to a certain band in the receiving spectrum to be lit through the LED driving circuit, control the micro-stepping motor 12 to rotate the continuous filter 11 through the motor driving circuit to change the light intensity, and input the output data of the sensor to be tested 22 at this time into the PC control module 4, and the drawing unit draws a curve of attenuation coefficient and output data of the sensor to be tested to obtain the receiving sensitivity of the sensor to be tested 22 in this band; control the multi-wavelength LED array 10 through the LED driving circuit to perform frequency scanning with the sensor excitation light modulation frequency as the center frequency, draw a curve of modulation frequency and output data of the sensor to be tested, and obtain the response characteristics of the sensor to be tested 22 to noises of different frequencies.

[0067] The present embodiment provides a method for measuring and evaluating hidden parameters of underwater ecological sensors. The device for measuring and evaluating hidden parameters of underwater ecological sensors described in Example 1 is used to measure hidden parameters that are not disclosed by underwater ecological sensor manufacturers without disassembling the sensor to be tested, which effectively helps users to gain an in-depth understanding of the performance and detailed parameters of the sensor, and provides an evaluation method and basis for similar sensors of different manufacturers and models. In addition, by controlling the LED to work at a specific frequency, the ability of the sensor to be tested to suppress the noise of the frequency is analyzed based on the output data of the sensor to be tested, which is conducive to the targeted development of noise suppression algorithms for sensors in specific application scenarios.

[0068] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0069] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A device for measuring and evaluating hidden parameters of underwater ecological sensors, characterized in that: include: A housing (1), wherein a slit is provided at one end of the housing (1) so as to allow excitation light of the sensor to be tested to enter the housing (1); An excitation light collection module (2) is arranged in the housing (1), the excitation light collection module (2) comprising a scanning Fabry-Perot interferometer (6) arranged behind a slit of the housing (1), an optical fiber (7) being arranged between the slit and the scanning Fabry-Perot interferometer (6), the scanning Fabry-Perot interferometer (6) being used to perform wavelength scanning on the excitation light of the sensor to be tested and to perform dispersion, the scanning Fabry-Perot interferometer (6) comprising a photodetector (8), the photodetector (8) being used to collect the dispersed light and convert it into an electrical signal; A fluorescence simulation module (3) is arranged in the housing (1) and in front of the excitation light collection module (2); the fluorescence simulation module (3) comprises a multi-wavelength LED array (10); the multi-wavelength LED array (10) is arranged circumferentially with the slit of the housing (1) as the center; the multi-wavelength LED array (10) is used to simulate the excitation light of the sensor to be tested; A PC control module (4), the excitation light collection module (2) and the fluorescence simulation module (3) are both electrically connected to the PC control module (4), the PC control module (4) is used to receive output data of the excitation light collection module (2) and the fluorescence simulation module (3), and the PC control module (4) includes a drawing unit, and the drawing unit is used to draw a curve of the output data.

2. The underwater ecological sensor hidden parameter measurement and evaluation device according to claim 1 is characterized in that: The end of the housing (1) provided with a slit is the front end, and the other end is the rear end of the housing (1). The excitation light collection module (2) further comprises: A collimator (5) is arranged at the front end of the housing (1) and is located between the slit of the housing (1) and the scanning Fabry-Perot interferometer (6), wherein the collimator (5) is used to collimate the excitation light of the sensor to be tested; The control circuit (9) is arranged beside the scanning Fabry-Perot interferometer (6), the scanning Fabry-Perot interferometer (6) and the photodetector (8) are both electrically connected to the control circuit (9), and the control circuit (9) is electrically connected to the PC control module (4).

3. The underwater ecological sensor hidden parameter measurement and evaluation device according to claim 2 is characterized in that: The fluorescence simulation module (3) further comprises: A continuous filter (11) is arranged at the front end of the housing (1) and in front of the multi-wavelength LED array (10), so that the light emitted by the multi-wavelength LED array (10) passes through the continuous filter (11) to change the light intensity; a hole is provided in the middle of the continuous filter (11) to adapt to the slit of the housing (1); A micro-stepping motor (12), wherein an output shaft of the micro-stepping motor (12) is connected to the continuous optical filter (11), and the micro-stepping motor (12) is used to drive the continuous optical filter (11) to rotate; A drive circuit (13) is arranged beside the scanning Fabry-Perot interferometer (6). The drive circuit (13) comprises an LED drive circuit and a motor drive circuit, which are electrically connected to the multi-wavelength LED array (10) and the micro-stepping motor (12) respectively. The LED drive circuit is used to control the lighting of the multi-wavelength LED array (10), and the motor drive circuit is used to drive the micro-stepping motor (12). The drive circuit (13) is electrically connected to the PC control module (4).

4. The underwater ecological sensor hidden parameter measurement and evaluation device according to claim 3 is characterized in that: A first gear (18) and a second gear (19) are further provided between the micro-stepping motor (12) and the continuous optical filter (11); the output shaft of the micro-stepping motor (12) is connected to the inner hole of the gear of the first gear (18); the continuous optical filter (11) is connected to the second gear (19); and the second gear (19) and the first gear (18) are meshed.

5. The underwater ecological sensor hidden parameter measurement and evaluation device according to claim 4 is characterized in that: It also comprises a bearing (20), wherein the bearing (20) is arranged between the continuous filter (11) and the second gear (19) to reduce friction.

6. The underwater ecological sensor hidden parameter measurement and evaluation device according to claim 2 is characterized in that: It also comprises an aperture (21), which is arranged at the slit of the housing (1) and is coaxially arranged with the collimating mirror (5) to limit the size of the light beam when the excitation light of the sensor to be tested is incident.

7. The underwater ecological sensor hidden parameter measurement and evaluation device according to claim 2 is characterized in that: An electrical connector (23) is provided at the rear end of the housing (1) and is electrically connected to the control circuit (9) and the drive circuit (13). The electrical connector (23) is used to connect to an external power source.

8. The underwater ecological sensor hidden parameter measurement and evaluation device according to claim 1 is characterized in that: It also includes a base plate (14), a sensor mounting bracket (15) and a longitudinal translation stage (16); The sensor mounting bracket (15) is arranged on the bottom plate (14) and is used to fix the sensor to be tested (22); The longitudinal translation platform (16) is arranged on the base plate (14) and is located on one side of the sensor mounting bracket (15). The housing (1) is connected to the longitudinal translation platform (16) via a clamp (17). The clamp (17) is slidably connected to the longitudinal translation platform (16) to adjust the position of the housing (1).

9. The underwater ecological sensor hidden parameter measurement and evaluation device according to claim 8, characterized in that: The sensor mounting bracket (15) comprises: A lateral translation platform (51) is disposed on the bottom plate (14); an optical turntable (52) disposed on the transverse translation stage (51), the optical turntable (52) being used to adjust the horizontal angle of the sensor to be tested (22), the optical turntable (52) being slidably connected to the transverse translation stage (51) to adjust the position of the sensor to be tested (22) on the bottom plate (14); The adjustable sensor mounting platform (53) is fixedly connected to the optical turntable (52), and the adjustable sensor mounting platform (53) comprises a fixing member (531) and an adjusting screw (532) connected to the fixing member (531) for fixing sensors of different sizes.

10. A method for measuring and evaluating hidden parameters of underwater ecological sensors, characterized in that: The underwater ecological sensor hidden parameter measurement and evaluation device according to any one of claims 1 to 9 comprises the following steps: Fixing and adjusting step: fixing the sensor to be tested (22) on the sensor mounting bracket (15), opening the sensor to be tested (22), and adjusting the longitudinal translation stage (16), the transverse translation stage (51) and the optical turntable (52) so that the light spot of the excitation light of the sensor to be tested is vertically irradiated on the slit of the housing (1); Excitation light collection step: controlling the scanning Fabry-Perot interferometer (6) through the control circuit (9) to scan the wavelength of the excitation light of the sensor to be tested and complete the dispersion, and at the same time controlling the photodetector (8) through the control circuit (9) to collect the dispersed light and convert it into an electrical signal for transmission to the PC control module (4); Excitation light parameter measurement steps: setting the scanning Fabry-Perot interferometer (6) to stay at the position of the central wavelength of the excitation light through the PC control module (4), and then repeatedly measuring the pulse frequency, pulse shape, single-cycle pulse number and relative light intensity of the excitation light modulation through the scanning Fabry-Perot interferometer (6); Fluorescence simulation step: adjusting the angle of the sensor to be tested (22) so that the incident window of the sensor to be tested (22) is perpendicular to the slit of the housing (1), then setting the pulse frequency, pulse shape, number of pulses in a single cycle and relative light intensity parameters of the excitation light modulation measured in the excitation light parameter measurement step through the PC control module (4), controlling the multi-wavelength LED array (10) to light up one by one through the LED driving circuit, irradiating the incident window of the sensor to be tested (22) one by one with the same waveform and frequency as the excitation light, and inputting the output data of the sensor to be tested (22) into the PC control module (4); The curve drawing and data acquisition steps include: drawing a curve of wavelength and output data of the sensor to be tested through a drawing unit of a PC control module (4) to obtain a receiving spectrum of an incident window of the sensor to be tested; lighting an LED corresponding to a certain band in the receiving spectrum through an LED driving circuit, controlling a micro-stepping motor (12) through a motor driving circuit to rotate a continuous filter (11) to change the light intensity, inputting the output data of the sensor to be tested at this time into the PC control module (4), and drawing a curve of attenuation coefficient and output data of the sensor to be tested by the drawing unit to obtain the receiving sensitivity of the sensor to be tested (22) in the band; controlling a multi-wavelength LED array (10) through an LED driving circuit to perform frequency scanning with the modulation frequency of the sensor excitation light as the center frequency, drawing a curve of modulation frequency and output data of the sensor to be tested, and obtaining the response characteristics of the sensor to be tested (22) to noises of different frequencies.

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