Multi-channel modularized spectrum confocal displacement sensor

Abstract

The utility model relates to the technical field of high-precision measurement, in particular to a multichannel modularized spectrum confocal displacement sensor, which comprises a sensor shell, a touch screen, a dispersion lens, a processing assembly, a connecting assembly and a light source assembly, and is characterized in that the light source assembly comprises a protective shell shell, a constant-current driver, a full-spectrum LED lamp, a radiating fin and a light source optical fiber connector; the constant-current driver, the full-spectrum LED lamp, the cooling fin and the light source optical fiber connector are installed in the protective shell body, the dispersion lens is used for being close to an object, parameters are set through the touch screen, the constant-current driver is started, the full-spectrum LED lamp is controlled to emit wide-spectrum polychromatic light, and testing is conducted. In the testing process, light signals reflected by an object are transmitted to the processing assembly through the connecting assembly to be processed, heat generated in the using process of the full-spectrum LED lamp is dissipated out through the cooling fins, and therefore the service life is prolonged, and the replacement cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision measurement, in particular to a multi-channel modular spectral confocal displacement sensor. Background Technique

[0002] Spectral confocal displacement detection is a new non-contact precision measurement technology, based on the spectral confocal principle: a broadband composite light emitted by a light source is spectrally dispersed after being collimated and focused by a dispersion lens, forming monochromatic light foci with continuous wavelengths on the optical axis, and the distance is positively correlated with the wavelengths of these foci. When the object to be measured is between these monochromatic light foci, a light spot is formed on the surface of the object to be measured. Only the light of a certain wavelength satisfies the confocal condition and is reflected back to the fiber coupler and enters the spectrometer. The light of other wavelengths is out of focus on the surface of the object to be measured, and most of the reflected light cannot enter the spectrometer. By decoding the wavelength at the maximum light intensity by the spectrometer, the corresponding distance value on the surface of the object to be measured can be obtained. This technology has the characteristics of high precision, no heat generation of the optical lens, and non-contact measurement of the thickness of transparent substances.

[0003] A multi-channel spectral confocal measurement system of the existing patent CN211012847U adopts a modular design, and divides the whole system into three modules: a spectral confocal probe, a fiber optic adapter card module, and a controller module; among them, there can be multiple spectral confocal probes, and the fiber optic adapter card module can contain multiple fiber optic adapter cards, and one spectral confocal probe is correspondingly connected to one fiber optic adapter card. Each component contained in the above three modules can be independently replaced. When any one of the components fails and needs to be replaced, only the faulty component needs to be replaced and recalibrated, and the whole system does not need to be replaced. Therefore, the spectral confocal measurement system disclosed in this embodiment greatly improves the interchangeability and maintainability of the system and reduces the maintenance cost.

[0004] However, when using the sensor of the existing patent, the fiber optic adapter card integrates a light source, a non-volatile memory, and an optical fiber. Since the light source needs to output sufficient power to emit light during use, heat will be generated, and the generated heat cannot be fully dissipated, which will cause the light source to overheat and be damaged, increasing the replacement cost. Content of the Utility Model

[0005] The purpose of the utility model is to provide a multi-channel modular spectral confocal displacement sensor, which solves the problem that in the process of using the sensor, the fiber optic adapter card integrates a light source, a non-volatile memory, and an optical fiber. Since the light source needs to output sufficient power to emit light during use, heat will be generated, and the generated heat cannot be fully dissipated, which will cause the light source to overheat and be damaged, increasing the replacement cost.

[0006] To achieve the above object, the utility model provides a multi-channel modular spectral confocal displacement sensor, which includes a sensor housing, a touch screen, a dispersion lens, a processing component, a connection component and a light source component. The touch screen is installed on the sensor housing. The dispersion lens is installed on the sensor housing through the connection component. The processing component is installed inside the sensor housing. The light source component includes a protective housing, a constant current driver, a full-spectrum LED lamp, a heat sink and a light source optical fiber connector. The constant current driver is fixedly installed inside the protective housing. The full-spectrum LED lamp is fixedly installed inside the protective housing. The heat sink is fixedly installed inside the protective housing and is located on one side of the protective housing close to the full-spectrum LED lamp. The light source optical fiber connector is fixedly installed on the protective housing.

[0007] Wherein, the protective housing has ventilation holes, and the ventilation holes are located on one side of the protective housing close to the heat sink, and the ventilation holes cooperate with the heat sink.

[0008] Wherein, the processing component includes a data collector, a main controller and a spectrometer receiving member. The data collector is fixedly installed inside the sensor housing; the main controller is fixedly installed inside the sensor housing; the spectrometer receiving member is installed inside the sensor housing.

[0009] Wherein, the spectrometer receiving member includes a receiving optical fiber connector, a slit, an optical reflector, a grating and a photosensitive device. The receiving optical fiber connector is fixedly installed on the sensor housing; the slit is fixedly installed inside the sensor housing; the optical reflector is fixedly installed inside the sensor housing; the grating is fixedly installed inside the sensor housing; the photosensitive device is fixedly installed inside the sensor housing.

[0010] Wherein, the connection component includes a Y-shaped optical fiber and an optical fiber coupler. The first end of the Y-shaped optical fiber is installed with the dispersion lens, the second end of the Y-shaped optical fiber is installed on the receiving optical fiber connector, and the third end of the Y-shaped optical fiber is installed on the light source optical fiber connector; the optical fiber coupler is installed on the Y-shaped optical fiber and is located at one end of the Y-shaped optical fiber close to the receiving optical fiber connector.

[0011] A multi-channel modular spectral confocal displacement sensor of the present utility model. The constant current driver is fixedly installed inside the protective shell housing. The full-spectrum LED lamp is fixedly installed inside the protective shell housing. The heat sink is fixedly installed inside the protective shell housing. The light source optical fiber connector is fixedly installed on the protective shell housing. When the relative displacement of an object needs to be measured or the thickness of the object to be measured is to be measured, the first end of the Y-shaped optical fiber is inserted into the light source optical fiber connector, the second end of the Y-shaped optical fiber is inserted into the receiving optical fiber connector, and the dispersion lens is installed on the third end of the Y-shaped optical fiber. The dispersion lens is used to approach the object. Parameters are set through the touch screen, so that the main controller controls the start of the constant current driver, controls the full-spectrum LED lamp to emit corresponding broadband composite light for testing. During the testing process, the optical signal reflected by the object is transmitted to the receiving optical fiber connector through the Y-shaped optical fiber and the fiber coupler, and parallel light rays are obtained through the slit and the optical mirror, and then the optical signal is dispersed into multiple light beams by the grating and transmitted to the photosensitive device. The photosensitive device receives the optical signal and converts it into an electrical signal and transmits it to the data collector. The data collector quickly and stably collects the spectrum, and then the result can be observed through the touch screen. During the use of the full-spectrum LED lamp, heat will be generated, and the generated heat is dissipated through the heat sink and the ventilation holes, thereby improving the service life and reducing the replacement cost. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0013] Figure 1 It is a schematic diagram of the overall structure of the multi-channel modular spectral confocal displacement sensor of the present utility model.

[0014] Figure 2 It is a schematic diagram of the installation structure of the heat sink of the present utility model.

[0015] Figure 3 It is a functional module diagram of the main controller.

[0016] In the figure: 101 - sensor housing, 102 - touch screen, 103 - dispersion lens, 104 - protective shell housing, 105 - constant current driver, 106 - full-spectrum LED lamp, 107 - heat sink, 108 - light source optical fiber connector, 109 - ventilation hole, 110 - data collector, 111 - main controller, 112 - receiving optical fiber connector, 113 - slit, 114 - optical mirror, 115 - grating, 116 - photosensitive device, 117 - Y-shaped optical fiber, 118 - fiber coupler. Detailed Embodiments

[0017] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0018] The first embodiment of the present application is as follows:

[0019] Please refer to Figures 1 to 3 , where Figure 1 is a schematic diagram of the overall structure of the multi-channel modular spectral confocal displacement sensor of the present utility model; Figure 2 is a schematic diagram of the installation structure of the heat sink of the present utility model; Figure 3 is a functional module diagram of the main controller.

[0020] The present utility model provides a multi-channel modular spectral confocal displacement sensor, including a sensor housing 101, a touch screen 102, a dispersion lens 103, a processing component, a connection component, and a light source component. The touch screen 102 is installed on the sensor housing 101. The dispersion lens 103 is installed on the sensor housing 101 through the connection component. The processing component is installed inside the sensor housing 101. The material of the sensor housing 101 is aluminum alloy. The sensor housing 101 supports the touch screen 102, the processing component, the connection component, and the light source component. The touch screen 102 functions as a small and portable host computer. The touch screen 102 can move within a certain range and can perform parameter settings and more efficient observation results. The dispersion lens 103 functions to generate spectral dispersion and can be one or more. In this solution, two dispersion lenses 103 are used. The processing component processes the collected optical signals. The connection component positions the dispersion lens 103 on the sensor housing 101 and connects it to the processing component and the light source component.

[0021] Among them, the light source assembly includes a protective shell 104, a constant current driver 105, a full-spectrum LED lamp 106, a heat sink 107 and a light source optical fiber connector 108, the constant current driver 105 is fixedly installed in the protective shell 104, the full-spectrum LED lamp 106 is fixedly installed in the protective shell 104, the heat sink 107 is fixedly installed in the protective shell 104, and is located on a side of the protective shell 104 close to the full-spectrum LED lamp 106, and the light source optical fiber connector 108 is fixedly installed on the protective shell 104. The protective shell 104 supports the constant current driver 105, the full-spectrum LED lamp 106, the heat sink 107 and the light source optical fiber connector 108. The protective shell 104 is separated from the sensor shell 101. The heat generated during the use of the full-spectrum LED lamp 106 will not affect the components in the sensor shell 101. The constant current driver 105 plays a role in regulating the power of the light source emitted by the full-spectrum LED lamp 106. The constant current driver 105 is electrically connected to the full-spectrum LED lamp 106. The constant current driver 105 can extend the expected life of the light source and improve the continuity of the light. The voltage of the light source emitted by the full-spectrum LED lamp 106 is controlled to control the intensity of the light source. The full-spectrum LED lamp 106 provides wide-spectrum complex light and emits a light source. The full-spectrum LED lamp 106 is electrically connected to the light source optical fiber connector 108. The heat sink 107 is made of aluminum alloy, and the heat sink 107 dissipates the heat generated during the use of the full-spectrum LED lamp 106, so that the heat is dissipated to the outside of the protective shell 104; the number of the light source fiber optic connectors 108 is multiple, and the light source fiber optic connectors 108 are used to connect the connection components; when it is necessary to test the relative displacement of the object or the thickness of the object to be tested, use the dispersion lens 103 to approach the object, set parameters through the touch screen 102, control the start of the constant current driver 105, and control the full-spectrum LED lamp 106 to emit corresponding wide-spectrum complex light for testing. During the test, the light signal reflected by the object is transmitted to the processing component through the connection component for processing. Heat is generated during the use of the full-spectrum LED lamp 106, and the generated heat is dissipated through the heat sink 107, thereby increasing the service life and reducing the replacement cost.

[0022] Secondly, the protective shell 104 has a ventilation hole 109, which is located on a side of the protective shell 104 close to the heat sink 107, and the ventilation hole 109 cooperates with the heat sink 107. The protective shell 104 is provided with the ventilation hole 109, and the ventilation hole 109 allows the heat derived from the heat sink 107 to flow out of the protective shell 104 through the ventilation hole 109, thereby achieving the purpose of heat dissipation.

[0023] Again, the processing component includes a data collector 110, a main controller 111, and a spectrometer receiving member. The data collector 110 is fixedly installed in the sensor housing 101; the main controller 111 is fixedly installed in the sensor housing 101; the spectrometer receiving member is installed in the sensor housing 101. The data collector 110 collects the electrical signals output by the spectrometer receiving member. The data collector 110 mainly uses an FPGA chip and an ADC chip. After receiving the command started by the main controller 111, the FPGA chip drives the ADC chip to start conversion, converts the received electrical signals into digital signals, and stores these digital signals in its own RAM for the main controller 111 to query and read. The data collector 110 is electrically connected to the main controller 111; the main controller 111 receives the instructions of the operator through the touch screen 102, configures relevant system parameters, result properties and peak selection, spot strength setting, input and output setting, controls and starts the constant current driver 105, enables the entire system to work according to the corresponding set logic, filters and processes the spectral data of the data collector 110, calculates the displacement information, and displays the result through the touch screen 102. The main controller 111 is electrically connected to the touch screen 102, and the main controller 111 is electrically connected to the constant current driver 105; the spectrometer receiving member receives the optical signals tested by the dispersion lens 103.

[0024] Subsequently, the spectrometer receiving component includes a receiving fiber optic connector 112, a slit 113, an optical mirror 114, a grating 115, and a photosensitive device 116. The receiving fiber optic connector 112 is fixedly installed on the sensor housing 101; the slit 113 is fixedly installed within the sensor housing 101; the optical mirror 114 is fixedly installed within the sensor housing 101; the grating 115 is fixedly installed within the sensor housing 101; the photosensitive device 116 is fixedly installed within the sensor housing 101. The receiving fiber optic connector 112 is electrically connected to the slit 113. The number of the receiving fiber optic connectors 112 is one, and the receiving fiber optic connector 112 is used to connect to the connection component; the function of the slit 113 is to limit the propagation direction and width of light. The slit 113 cooperates with the optical mirror 114 to obtain better parallel light rays; the optical mirror 114 reflects light onto the grating 115; the grating 115 disperses the optical signal into multiple light beams spatially according to wavelength. The grating 115 is electrically connected to the photosensitive device 116; the photosensitive device 116 receives the optical signal transmitted by the grating 115 and converts the obtained optical signal into an electrical signal. The photosensitive device 116 can be a complementary metal oxide semiconductor. The photosensitive device 116 is electrically connected to the data collector 110 and transmits the electrical signal to the data collector 110.

[0025] Then, the connection component includes a Y-shaped optical fiber 117 and an optical fiber coupler 118. The first end of the Y-shaped optical fiber 117 is equipped with the dispersion lens 103. The second end of the Y-shaped optical fiber 117 is installed on the receiving fiber optic connector 112, and the third end of the Y-shaped optical fiber 117 is installed on the light source fiber optic connector 108; the optical fiber coupler 118 is installed on the Y-shaped optical fiber 117 and is located at one end of the Y-shaped optical fiber 117 close to the receiving fiber optic connector 112. The Y-shaped optical fiber 117 transmits the optical signal. The Y-shaped optical fiber 117 is electrically connected to the light source fiber optic connector 108, the receiving fiber optic connector 112, and the dispersion lens 103 respectively to transmit the optical signal; the optical fiber coupler 118 is composed of multiple SMA fiber optic interfaces and functions to couple and regulate the optical signal.

[0026] When a multi-channel modular spectral confocal displacement sensor of this embodiment is in use, when it is necessary to measure the relative displacement of an object or the thickness of the object to be measured, the first end of the Y-shaped optical fiber 117 is inserted into the light source optical fiber connector 108, the second end of the Y-shaped optical fiber 117 is inserted into the receiving optical fiber connector 112, and the dispersion lens 103 is installed on the third end of the Y-shaped optical fiber 117. The dispersion lens 103 is used to approach the object, and parameters are set through the touch screen 102, so that the main controller 111 controls the start of the constant current driver 105 to control the full-spectrum LED lamp 106 to emit corresponding broadband composite light for testing. During the testing process, the optical signal reflected by the object is transmitted to the receiving optical fiber connector 112 through the Y-shaped optical fiber 117 and the optical fiber coupler 118, and parallel light rays are obtained through the slit 113 and the optical reflector 114, and then the optical signal is dispersed into multiple light beams by the grating 115 and transmitted to the photosensitive device 116. The photosensitive device 116 receives the optical signal and converts it into an electrical signal and transmits it to the data collector 110. The data collector 110 quickly and stably collects the spectrum, and then the result can be observed through the touch screen 102. Heat is generated during the use of the full-spectrum LED lamp 106, and the generated heat is dissipated through the heat sink 107 and the ventilation hole 109, thereby improving the service life and reducing the replacement cost.

[0027] The above disclosure is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Those of ordinary skill in the art can understand the entire or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A multi-channel modular spectral confocal displacement sensor, comprising a sensor housing, a touch screen, a dispersion lens, a processing component and a connecting component, wherein the touch screen is mounted on the sensor housing, the dispersion lens is mounted on the sensor housing through the connecting component, and the processing component is mounted in the sensor housing, characterized in that: Also included is a light source assembly; The light source assembly includes a protective shell, a constant current driver, a full-spectrum LED lamp, a heat sink and a light source optical fiber connector. The constant current driver is fixedly installed in the protective shell, the full-spectrum LED lamp is fixedly installed in the protective shell, the heat sink is fixedly installed in the protective shell and is located on a side of the protective shell close to the full-spectrum LED lamp, and the light source optical fiber connector is fixedly installed on the protective shell.

2. The multi-channel modular spectral confocal displacement sensor according to claim 1, characterized in that: The protective shell has a ventilation hole, the ventilation hole is located on a side of the protective shell close to the heat sink, and the ventilation hole cooperates with the heat sink.

3. The multi-channel modular spectral confocal displacement sensor according to claim 1, characterized in that: The processing component includes a data collector, a main controller and a spectrometer receiving component. The data collector is fixedly installed in the sensor housing; the main controller is fixedly installed in the sensor housing; and the spectrometer receiving component is installed in the sensor housing.

4. The multi-channel modular spectral confocal displacement sensor according to claim 3, characterized in that: The spectrometer receiving component includes a receiving optical fiber connector, a slit, an optical reflector, a grating and a photosensitive device. The receiving optical fiber connector is fixedly installed on the sensor housing; the slit is fixedly installed in the sensor housing; the optical reflector is fixedly installed in the sensor housing; the grating is fixedly installed in the sensor housing; and the photosensitive device is fixedly installed in the sensor housing.

5. The multi-channel modular spectral confocal displacement sensor according to claim 4, characterized in that: The connection component includes a Y-type optical fiber and a fiber coupler, the first end of the Y-type optical fiber is installed with the dispersion lens, the second end of the Y-type optical fiber is installed on the receiving fiber connector, and the third end of the Y-type optical fiber is installed on the light source fiber connector; the fiber coupler is installed on the Y-type optical fiber and is located at one end of the Y-type optical fiber close to the receiving fiber connector.

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