CN112858189A - Automatically controlled subassembly and spectrum appearance of spectrum appearance - Google Patents
Automatically controlled subassembly and spectrum appearance of spectrum appearance Download PDFInfo
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Abstract
The invention provides an electric control component of a spectrometer and the spectrometer, wherein the electric control component of the spectrometer comprises a power supply module, a processor, a motor drive circuit and a light source drive circuit, the processor correspondingly controls the light source drive circuit and the motor drive circuit to work according to a control instruction of an upper computer, the light source drive circuit drives a light source component of the spectrometer to work so as to excite a sample to be detected to reflect or emit light, meanwhile, the motor drive circuit drives the motor component to work so as to drive the motor component to rotate and further drive the light source component to act, so that spectrum testing on different test points of the sample to be detected is realized, and the acquired spectrum detection data of the different test points of the sample to be detected are sent to the upper computer. Therefore, the purposes of automatic control, reduction of labor and improvement of detection accuracy are achieved.
Description
Technical Field
The invention belongs to the technical field of spectrometers, and particularly relates to an electric control assembly of a spectrometer and the spectrometer.
Background
A spectrometer, also called a spectrometer, is a qualitative and quantitative analysis instrument. The information of excitation spectrum, emission spectrum, fluorescence lifetime, liquid sample concentration and the like of the substance can be obtained through the spectrum test. Fluorescence spectrometers are based on the photoluminescence properties of fluorescent materials and are commonly used to detect the dipole orientation of molecules of thin film materials.
The traditional spectrometer adjusts the incident angle of a light source in a manual rotation mode to acquire spectrum detection data of different test points of a sample to be detected, so that the technical problems of time consumption in detection and inaccurate detection result exist.
Disclosure of Invention
The application aims to provide a spectrometer and aims to solve the technical problems that detection of the spectrometer is time-consuming and detection results are inaccurate due to a manual rotation mode.
A first aspect of the embodiments of the present application provides an electronic control component of a spectrometer, where the electronic control component of the spectrometer includes a power module, a processor, a motor driving circuit, and a light source driving circuit, a power source end of the power module is respectively connected to a power source end of the processor, a power source input end of the light source driving circuit, and a power source input end of the motor driving circuit, a control end of the processor is respectively connected to a controlled end of the light source driving circuit and a controlled end of the motor driving circuit, a power source output end of the light source driving circuit is electrically connected to a light source assembly of the spectrometer, a power source output end of the motor driving circuit is electrically connected to a motor component of the spectrometer, and the motor component is mechanically connected to the light source assembly;
the processor is used for controlling the light source driving circuit to drive the light source assembly to emit light to the sample to be detected according to the control instruction of the upper computer so as to excite the sample to be detected to reflect or emit light, and controlling the motor driving circuit to drive the motor assembly to rotate according to the control instruction of the upper computer so as to drive the motor assembly and the light source assembly to act so as to perform spectrum testing on different test points of the sample to be detected; and
and acquiring the spectrum detection data of different test points of the sample to be detected through the light source assembly, analyzing and processing the data, and sending the acquired spectrum detection data of the different test points of the sample to be detected to the upper computer.
In one embodiment, the light source driving circuit comprises a signal amplification module, a driving module, a current sampling module, a voltage sampling module and a light source driving interface;
the signal input end of the signal amplification module is connected with the signal end of the processor, the signal output end of the signal amplification module is connected with the signal input end of the driving module, the power supply input end of the light source driving interface, the sampling end of the current sampling module and the sampling end of the voltage sampling module are interconnected, and the light source driving interface is connected with the light source assembly;
the signal amplification module is used for carrying out signal amplification processing on the light source driving signal output by the processor;
the driving module is used for outputting direct current with corresponding magnitude to the light source driving interface according to the amplified light source driving signal so as to drive the light source component to work;
the current sampling module is used for sampling the current of the direct current output by the driving module and outputting a current sampling signal to the processor;
and the voltage sampling module is used for sampling the voltage of the direct current output by the driving module and outputting a voltage application signal to the processor.
In one embodiment, the signal amplification module comprises a signal amplifier unit for performing signal amplification processing on the light source driving signal and a voltage follower for performing signal isolation;
the processor, the signal amplifier unit, the voltage follower and the driving module are electrically connected in sequence.
In one embodiment, the driving module includes a switching power supply circuit or a switching power supply chip.
In one embodiment, the current sampling module comprises a sampling resistor and an analog-to-digital conversion chip;
the sampling resistor is connected in series between the driving module and the light source driving interface, two ends of the sampling resistor are also connected with a signal input end of the analog-to-digital conversion chip respectively, and a signal output end of the analog-to-digital conversion chip is connected with a signal end of the processor;
the analog-to-digital conversion chip is used for determining a current value flowing through the sampling resistor according to the voltages at the two ends of the sampling resistor, and performing analog-to-digital conversion on the obtained current value to output a current sampling signal to the processor.
In one embodiment, the motor driving circuit includes a first motor driving chip, a second motor driving chip, a third motor driving chip, a first motor driving interface, a second motor driving interface, and a third motor driving interface;
the first motor driving chip is connected with the motor assembly through the first motor driving interface, the second motor driving chip is connected with the motor assembly through the second motor driving interface, and the third motor driving chip is connected with the motor assembly through the third motor driving interface.
In one embodiment, the motor driving circuit further comprises a monitoring protection circuit, and the monitoring protection circuit is respectively connected with the first motor driving chip, the second motor driving chip and the third motor driving chip;
the processor is further used for controlling the monitoring protection circuit to monitor the voltage signals and the current signals output by the first motor driving chip, the second motor driving chip and the third motor driving chip respectively so as to perform overvoltage protection and overcurrent protection on the motor assembly.
In one embodiment, the electronic control assembly further comprises a USB interface and a USB drive circuit; the USB drive circuit is connected between the USB interface and the processor, and the USB interface is in communication connection with an upper computer through a USB data line;
the USB drive circuit is used for receiving a control instruction of the upper computer through the USB interface, sending the control instruction to the processor, and sending the spectrum detection data output by the processor to the upper computer through the USB interface.
A second aspect of the embodiments of the present application provides a spectrometer, which includes a light source assembly, a motor assembly, and an electric control assembly of the spectrometer as described above, wherein a control end of the electric control assembly is connected to controlled ends of the light source assembly and the motor assembly, respectively, the light source assembly includes a sample holder, a light source, a light receiver, and a spectrum detector, the motor assembly includes N rotating electrical machines, the light receiver is in communication connection with the spectrum detector through an optical fiber, and the sample holder is configured to carry a sample to be detected;
the processor of the electronic control assembly is used for controlling the light source driving circuit to drive the light source to emit light to the sample to be detected according to a control instruction of an upper computer so as to excite the sample to be detected to reflect or emit light, and controlling the motor driving circuit to drive the N rotating motors to rotate according to the control instruction of the upper computer so as to drive the light source and/or the light receiver and/or the sample rack to move, so as to perform spectrum testing on different test points of the sample to be detected;
the optical receiver is used for receiving the reflected or emitted light of different test points of the sample to be detected and sending the light to the spectrum detector;
the spectrum detector is used for acquiring the light rays reflected or emitted by different test points of the sample to be detected, sampling and performing photoelectric conversion to obtain spectrum detection data of the different test points of the sample to be detected and sending the spectrum detection data to the processor.
In one embodiment, the N rotating motors include a first rotating motor, a second rotating motor, and a third rotating motor, the first rotating motor is mechanically connected to the light source, the second rotating motor is mechanically connected to the light receiver, and the third rotating motor is mechanically connected to the sample holder.
The electric control assembly of the spectrometer realizes the regulation and control of the spectrometer by arranging the processor, the light source driving circuit and the motor driving circuit, the processor correspondingly controls the light source driving circuit and the motor driving circuit to work according to a control instruction of the upper computer, the light source driving circuit drives the light source assembly of the spectrometer to work so as to excite the sample to be detected to reflect or emit light, meanwhile, the motor driving circuit drives the motor assembly to work so as to drive the motor assembly to rotate to act and further drive the light source assembly to act, so that the spectrum test of different test points of the sample to be detected is realized, and the acquired spectrum test data of the different test points of the sample to be detected is sent to the upper computer. Automatic control is realized, manpower is reduced, and detection accuracy is improved, so that the technical problems that detection of a spectrometer is time-consuming and detection results are inaccurate due to a manual rotation mode are solved.
Drawings
FIG. 1 is a schematic diagram of a spectrometer according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first configuration of an electronic control assembly of a spectrometer according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a second configuration of an electronic control assembly of the spectrometer according to the present invention;
FIG. 4 is a schematic diagram of a third configuration of an electronic control assembly of the spectrometer according to the embodiment of the present invention;
FIG. 5 is a schematic diagram of a fourth configuration of an electronic control assembly of the spectrometer according to the embodiment of the present invention;
FIG. 6 is a schematic diagram of a fifth configuration of an electronic control assembly of the spectrometer according to the embodiment of the present invention;
FIG. 7 is a diagram illustrating a sixth configuration of an electronic control assembly of the spectrometer according to the embodiment of the present invention;
fig. 8 is a schematic diagram of a seventh structure of an electronic control component of a spectrometer according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The invention discloses an electronic control component 100 of a spectrometer.
As shown in fig. 1, for convenience of description, in the present embodiment, a structure of a spectrometer 1 is described first, where the spectrometer 1 has a structure shown in fig. 8, the spectrometer 1 includes a light source assembly 200, a motor assembly 300, and an electrical control assembly 100 of the spectrometer, a control end of the electrical control assembly 100 is connected to controlled ends of the light source assembly 200 and the motor assembly 300, respectively, the light source assembly 200 includes a sample holder 230, a light source 210, a light receiver 220, and a spectrum detector 240, the motor assembly 300 includes N rotating motors, the light receiver 220 is communicatively connected to the spectrum detector 240 through an optical fiber, and the sample holder 230 is used for carrying a sample 400 to be detected.
The working principle of the spectrometer 1 is as follows: after the electric control assembly 100 is powered on, the rotating motors in the motor assembly 300 are automatically reset, the three rotating motors are sequentially reset to the zero position, and then receive the control instruction of the upper computer 2, the electric control assembly 100 outputs a driving signal to the light source 210 according to the control instruction of the upper computer 2, and the fluorescent LED is turned on according to the driving signal of the light source driving circuit 130, so that light is emitted to the sample 400 to be detected, and the sample 400 to be detected is excited to reflect or emit light, meanwhile, the motor assembly 300 is controlled to work according to the control instruction of the upper computer 2, so that the operating angles and speeds of the three rotating motors are controlled, the rotating motors drive the light source assembly 200 to complete the scanning work of the sample 400 to be detected, so that different points of the sample 400 to be detected are scanned and excited, the light receiver 220 receives the light reflected or emitted by different test points, the spectrum detector 240 obtains the light reflected or emitted from different test points of the sample 400 to be detected, and performs sampling and photoelectric conversion to obtain spectrum detection data of different test points of the sample 400 to be detected, and sends the spectrum detection data to the processor 120.
Wherein, the electric control component 100 completes signal processing, signal processing and corresponding driving work, the electric control component 100 and the upper computer 2 can receive and feed back signals in a wireless or wired communication mode, the specific mode is not limited, as shown in fig. 2, the electronic control assembly 100 includes a power module 110, a processor 120, a motor driving circuit 140 and a light source driving circuit 130, wherein a power source end of the power module 110 is respectively connected to a power source end of the processor 120, a power source input end of the light source driving circuit 130 and a power source input end of the motor driving circuit 140, a control end of the processor 120 is respectively connected to a controlled end of the light source driving circuit 130 and a controlled end of the motor driving circuit 140, a power source output end of the light source driving circuit 130 is electrically connected to a light source assembly 200 of the spectrometer 1, a power source output end of the motor driving circuit 140 is electrically connected to a motor assembly 300 of the spectrometer 1, and the motor assembly 300 is mechanically connected to the light;
the processor 120 is used for controlling the light source driving circuit 130 to drive the light source assembly 200 to emit light to the sample 400 to be detected according to the control instruction of the upper computer 2 so as to excite the sample 400 to be detected to reflect or emit light, and controlling the motor driving circuit 140 to drive the motor assembly 300 to rotate according to the control instruction of the upper computer 2 so as to drive the motor assembly 300 and the light source assembly 200 to move, so as to perform spectrum testing on different test points of the sample 400 to be detected; and
the light source assembly 200 is used for acquiring the spectrum detection data of different test points of the sample 400 to be detected, analyzing and processing the data, and sending the acquired spectrum detection data of different test points of the sample 400 to be detected to the upper computer 2.
In this embodiment, the light source driving circuit 130 implements the driving operation of the light source 210, and simultaneously monitors the operating voltage and the operating current of the light source 210, and feeds back the operating voltage and the operating current of the light source 210 to the processor 120, and similarly, the motor driving circuit 140 implements the operation of the motor assembly 300, and simultaneously monitors the operating voltage and the operating current of the rotating electrical machine, and feeds back the operating voltage and the operating current of the rotating electrical machine to the processor 120, and further feeds back the operating voltage and the operating current to the host computer 2, thereby implementing the closed-loop feedback protection, and avoiding the problems of overcurrent, overvoltage, and the like, and therefore, it can be understood that the light source driving circuit 130 and the motor driving circuit 140 at least include a switching power supply circuit and a sampling circuit, and the specific circuit structure of the light source driving.
The light source assembly 200 and the motor assembly 300 of the spectrometer 1 are automatically controlled by arranging the light source 210 driving and motor driving circuit 140, so that different detection points of a sample 400 to be detected can be accurately detected, and meanwhile, the labor cost is reduced.
In this embodiment, the processor 120 may be any processor with data processing and control functions according to selection, and the processor 120 may be a CPU, or may also be other general-purpose processors, DSPs, ASICs, FPGAs, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor 120 may be any conventional processor or the like.
The electronic control component 100 of the spectrometer realizes the regulation and control of the spectrometer 1 by arranging the processor 120, the light source driving circuit 130 and the motor driving circuit 140, the processor 120 correspondingly controls the light source driving circuit 130 and the motor driving circuit 140 to work according to a control instruction of the upper computer 2, the light source driving circuit 130 drives the light source component 200 of the spectrometer 1 to work so as to excite the sample 400 to be detected to reflect or emit light, meanwhile, the motor driving circuit 140 drives the motor component 300 to work so as to drive the motor component 300 to rotate and further drive the light source component 200 to act, so that the spectrum test of different test points of the sample 400 to be detected is realized, and the acquired spectrum detection data of the sample 400 to be detected at the different test points are sent to the upper computer 2. Automatic control is realized, manpower is reduced, and detection accuracy is improved, so that the technical problems that detection of the spectrometer 1 is time-consuming and detection results are inaccurate due to a manual rotation mode are solved.
As shown in fig. 3, in one embodiment, light source driving circuit 130 includes a signal amplification module 131, a driving module 132, a current sampling module 133, a voltage sampling module 134, and a light source driving interface 135;
a signal input end of the signal amplification module 131 is connected with a signal end of the processor 120, a signal output end of the signal amplification module 131 is connected with a signal input end of the driving module 132, a power supply input end of the light source driving interface 135, a sampling end of the current sampling module 133 and a sampling end of the voltage sampling module 134 are interconnected, and the light source driving interface 135 is connected with the light source assembly 200;
a signal amplification module 131, configured to perform signal amplification processing on the light source driving signal output by the processor 120;
the driving module 132 is configured to output a direct current with a corresponding magnitude to the light source driving interface 135 according to the amplified light source driving signal, so as to drive the light source module 200 to operate;
a current sampling module 133, configured to perform current sampling on the direct current output by the driving module 132, and output a current sampling signal to the processor 120;
and the voltage sampling module 134 is configured to perform voltage sampling on the direct current output by the driving module 132, and output a voltage sampling signal to the processor 120.
In this embodiment, the signal amplification module 131 may be a multi-stage amplifier unit, and may further include an isolation unit, and the specific amplification factor and precision may be selected according to requirements, as shown in fig. 4, in an embodiment, the signal amplification module 131 includes a signal amplifier unit 131A for performing signal amplification processing on the light source driving signal and a voltage follower 131B for performing signal isolation, and the processor 120, the signal amplifier unit 131A, the voltage follower 131B, and the driving module 132 are electrically connected in sequence.
The driving module 132 may be an LED driving circuit composed of independent components, such as a BUCK-BOOST circuit, a switching power supply circuit, and the like, or an LED driving circuit composed of a chip structure, where the specific structure is not limited, and in an embodiment, the driving module 132 includes a switching power supply circuit or a switching power supply chip.
Meanwhile, the current sampling module 133 may be a sampling resistor R1, a current transformer, or other devices or circuits, as shown in fig. 5, in an embodiment, the current sampling module 133 includes a sampling resistor R1 and an analog-to-digital conversion chip U1, the sampling resistor R1 is connected in series between the driving module 132 and the light source driving interface 135, two ends of the sampling resistor R1 are further connected to a signal input end of the analog-to-digital conversion chip U1, a signal output end of the analog-to-digital conversion chip U1 is connected to a signal end of the processor 120, the analog-to-digital conversion chip U1 determines a current value flowing through the sampling resistor R1 according to voltages at two ends of the sampling resistor R1, performs analog-to-digital conversion on the obtained current value to output a current sampling signal to the processor 120, and the controller determines a working current of the light source 210 according to the current.
The voltage sampling module 134 may be implemented by a voltage dividing resistor circuit or a voltage transformer, and may also include an analog-to-digital conversion circuit, where the acquired voltage signal is output to the processor 120 through analog-to-digital conversion, and the processor 120 implements voltage protection of the light source 210 according to the voltage sampling signal.
As shown in fig. 6, in one embodiment, the motor driving circuit 140 includes a first motor driving chip 141, a second motor driving chip 142, a third motor driving chip 143, a first motor driving interface 144, a second motor driving interface 145, and a third motor driving interface 146;
the first motor driving chip 141 is connected to the motor assembly 300 through the first motor driving interface 144, the second motor driving chip 142 is connected to the motor assembly 300 through the second motor driving interface 145, and the third motor driving chip 143 is connected to the motor assembly 300 through the third motor driving interface 146.
In this embodiment, the three motor driving interfaces are respectively connected to the first rotating electrical machine 310, the second rotating electrical machine 320 and the third rotating electrical machine 330 in the electrical component 300, the processor 120 correspondingly and respectively outputs driving signals to the first motor driving chip 141, the second motor driving chip 142 and the third motor driving chip 143 according to a control instruction of the upper computer 2, and the three motor driving chips respectively drive the three rotating electrical machines to rotate, so as to change a test point of the sample 400 to be detected, an irradiation angle of the light source 210 and a receiving angle of the light receiver 220, and realize detection of different test points of the sample 400 to be detected and acquisition of spectrum detection data.
The type of the motor driving chip can be selected correspondingly according to the requirement, such as the control chip DRV 88.
As shown in fig. 7, in an embodiment, the motor driving circuit 140 further includes a monitoring protection circuit 147, the monitoring protection circuit 147 is respectively connected to the first motor driving chip 141, the second motor driving chip 142 and the third motor driving chip 143, and the processor 120 is further configured to control the monitoring protection circuit 147 to respectively monitor the voltage signal and the current signal output by the first motor driving chip 141, the second motor driving chip 142 and the third motor driving chip 143, so as to perform an overvoltage protection and an overcurrent protection on the motor assembly 300.
As shown in fig. 8, in one embodiment, the electronic control assembly 100 further includes a USB interface 160 and a USB driver circuit 150; the USB driving circuit 150 is connected between the USB interface 160 and the processor 120, and the USB interface 160 is connected to the upper computer 2 through a USB data line;
the USB driver circuit 150 is configured to receive a control instruction of the upper computer 2 through the USB interface 160, send the control instruction to the processor 120, and send the spectrum detection data output by the processor 120 to the upper computer 2 through the USB interface 160, in a specific application, according to a difference of types of the USB interface 160, the USB driver circuit 150 adapted to the type of the USB interface 160 may be selected, for example, the USB driver circuit 150 may include a USB driver chip written with a USB driver.
A second aspect of the embodiment of the present application provides a spectrometer 1, which includes a light source assembly 200, a motor assembly 300, and the above spectrometer electrical control assembly 100, where the specific structure of the spectrometer electrical control assembly 100 refers to the above embodiment, and as the spectrometer 1 adopts all technical solutions of all the above embodiments, at least all beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is provided herein. The control end of the electric control assembly 100 is respectively connected with the controlled ends of the light source assembly 200 and the motor assembly 300, the light source assembly 200 comprises a sample holder 230, a light source 210, a light receiver 220 and a spectrum detector 240, the motor assembly 300 comprises N rotating motors, the light receiver 220 is in communication connection with the spectrum detector 240 through an optical fiber, and the sample holder 230 is used for bearing a sample 400 to be detected;
the processor 120 of the electronic control assembly 100 is configured to control the light source driving circuit 130 to drive the light source 210 to emit light to the sample 400 to be detected according to the control instruction of the upper computer 2, so as to excite the sample 400 to be detected to reflect or emit light, and control the motor driving circuit 140 to drive the N rotating motors to rotate according to the control instruction of the upper computer 2, so as to drive the light source 210 and/or the light receiver 220 and/or the sample holder 230 to move, so as to perform spectrum testing on different test points of the sample 400 to be detected;
the optical receiver 220 is configured to receive light reflected or emitted from different test points of the sample 400 to be detected and send the light to the spectrum detector 240;
the spectrum detector 240 is configured to obtain light reflected or emitted from different test points of the sample 400 to be detected, perform sampling and photoelectric conversion, obtain spectrum detection data of the different test points of the sample 400 to be detected, and send the spectrum detection data to the processor 120.
In this embodiment, the working principle of the spectrometer 1 is as follows: after the electric control assembly 100 is powered on, the rotating motors in the motor assembly 300 are automatically reset, the three rotating motors are sequentially reset to the zero position, and then receive the control instruction of the upper computer 2, the electric control assembly 100 outputs a driving signal to the light source 210 according to the control instruction of the upper computer 2, and the fluorescent LED is turned on according to the driving signal of the light source driving circuit 130, so that light is emitted to the sample 400 to be detected, and the sample 400 to be detected is excited to reflect or emit light, meanwhile, the motor assembly 300 is controlled to work according to the control instruction of the upper computer 2, so that the operating angles and speeds of the three rotating motors are controlled, the rotating motors drive the light source assembly 200 to complete the scanning work of the sample 400 to be detected, so that different points of the sample 400 to be detected are scanned and excited, the light receiver 220 receives the light reflected or emitted by different test points, the spectrum detector 240 obtains light reflected or emitted from different test points of the sample 400 to be detected, performs sampling and photoelectric conversion to obtain spectrum detection data of the different test points of the sample 400 to be detected, and sends the spectrum detection data to the processor 120, and the processor 120 sends the obtained spectrum detection data to the upper computer 2.
The sample holder 230 may be configured to have any shape capable of holding a sample according to actual needs, for example, a cylindrical platform, a rectangular platform, or the like. Fig. 1 exemplarily shows that the sample holder 2301 is a cylindrical platform.
Depending on the type of spectrometer 1, a corresponding light source 210 may be selected. For example, when the spectrometer 1 is a fluorescence spectrometer 1, the light source 210 is an ultraviolet light source 210; when the spectrometer 1 is an infrared spectrometer 1, the light source 210 is an infrared light source 210; when the spectrometer 1 is a visible light spectrometer 1, the light source 210 is a visible light source 210.
The light receiver 220 may be a converging lens with an optical fiber connected to the tail thereof, and is mainly used for coupling the light reflected or emitted from the sample excited by the light source 210 to the optical fiber and transmitting the light to the spectral detector 240. For example, the optical receiver 220 may be an optical receiver or a fiber optic receiver.
The spectrum detector 240 is mainly used for sampling the light reflected or emitted from the sample 400 to be detected and converting the light into an electrical signal. The spectral detector 240 may include a dispersive element, a focusing element, and a detector array, which may be a CCD (charged coupled device) array or other kind of photodetector array, for example, a photodetector array composed of a plurality of photoelectric converters. The photoelectric converter may be a photomultiplier tube.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. An electric control assembly of a spectrometer is characterized by comprising a power supply module, a processor, a motor driving circuit and a light source driving circuit, wherein the power supply end of the power supply module is respectively and correspondingly connected with the power supply end of the processor, the power supply input end of the light source driving circuit and the power supply input end of the motor driving circuit, the control end of the processor is respectively connected with the controlled end of the light source driving circuit and the controlled end of the motor driving circuit, the power supply output end of the light source driving circuit is electrically connected with a light source assembly of the spectrometer, the power supply output end of the motor driving circuit is electrically connected with a motor assembly of the spectrometer, and the motor assembly is mechanically connected with the light source assembly;
the processor is used for controlling the light source driving circuit to drive the light source assembly to emit light to the sample to be detected according to the control instruction of the upper computer so as to excite the sample to be detected to reflect or emit light, and controlling the motor driving circuit to drive the motor assembly to rotate according to the control instruction of the upper computer so as to drive the motor assembly and the light source assembly to act so as to perform spectrum testing on different test points of the sample to be detected; and
and acquiring the spectrum detection data of different test points of the sample to be detected through the light source assembly, analyzing and processing the data, and sending the acquired spectrum detection data of the different test points of the sample to be detected to the upper computer.
2. The electronic control assembly of a spectrometer of claim 1, wherein the light source driving circuit comprises a signal amplification module, a driving module, a current sampling module, a voltage sampling module, and a light source driving interface;
the signal input end of the signal amplification module is connected with the signal end of the processor, the signal output end of the signal amplification module is connected with the signal input end of the driving module, the power supply input end of the light source driving interface, the sampling end of the current sampling module and the sampling end of the voltage sampling module are interconnected, and the light source driving interface is connected with the light source assembly;
the signal amplification module is used for carrying out signal amplification processing on the light source driving signal output by the processor;
the driving module is used for outputting direct current with corresponding magnitude to the light source driving interface according to the amplified light source driving signal so as to drive the light source component to work;
the current sampling module is used for sampling the current of the direct current output by the driving module and outputting a current sampling signal to the processor;
and the voltage sampling module is used for sampling the voltage of the direct current output by the driving module and outputting a voltage application signal to the processor.
3. An electronic control assembly for a spectrometer as in claim 2, wherein the signal amplification module comprises a signal amplifier unit for performing signal amplification processing on the light source driving signal and a voltage follower for performing signal isolation;
the processor, the signal amplifier unit, the voltage follower and the driving module are electrically connected in sequence.
4. An electronic control component of a spectrometer as in claim 2, wherein the driving module comprises a switching power supply circuit or a switching power supply chip.
5. An electronic control component of a spectrometer as in claim 2, wherein the current sampling module comprises a sampling resistor and an analog-to-digital conversion chip;
the sampling resistor is connected in series between the driving module and the light source driving interface, two ends of the sampling resistor are also connected with a signal input end of the analog-to-digital conversion chip respectively, and a signal output end of the analog-to-digital conversion chip is connected with a signal end of the processor;
the analog-to-digital conversion chip is used for determining a current value flowing through the sampling resistor according to the voltages at the two ends of the sampling resistor, and performing analog-to-digital conversion on the obtained current value to output a current sampling signal to the processor.
6. An electronic control assembly for a spectrometer as in claim 2, wherein the motor drive circuit comprises a first motor drive chip, a second motor drive chip, a third motor drive chip, a first motor drive interface, a second motor drive interface, and a third motor drive interface;
the first motor driving chip is connected with the motor assembly through the first motor driving interface, the second motor driving chip is connected with the motor assembly through the second motor driving interface, and the third motor driving chip is connected with the motor assembly through the third motor driving interface.
7. An electronic control component of a spectrometer as in claim 6, wherein the motor driving circuit further comprises a monitoring protection circuit, the monitoring protection circuit being connected to the first motor driving chip, the second motor driving chip and the third motor driving chip, respectively;
the processor is further used for controlling the monitoring protection circuit to monitor the voltage signals and the current signals output by the first motor driving chip, the second motor driving chip and the third motor driving chip respectively so as to perform overvoltage protection and overcurrent protection on the motor assembly.
8. An electronic control assembly for a spectrometer as in claim 1, wherein the electronic control assembly further comprises a USB interface and a USB driver circuit; the USB drive circuit is connected between the USB interface and the processor, and the USB interface is in communication connection with an upper computer through a USB data line;
the USB drive circuit is used for receiving a control instruction of the upper computer through the USB interface, sending the control instruction to the processor, and sending the spectrum detection data output by the processor to the upper computer through the USB interface.
9. A spectrometer, characterized by comprising a light source assembly, a motor assembly and an electric control assembly of the spectrometer as claimed in any of claims 1-8, wherein a control end of the electric control assembly is connected with controlled ends of the light source assembly and the motor assembly respectively, the light source assembly comprises a sample holder, a light source, a light receiver and a spectrum detector, the motor assembly comprises N rotating motors, the light receiver is in communication connection with the spectrum detector through an optical fiber, and the sample holder is used for bearing a sample to be detected;
the processor of the electronic control assembly is used for controlling the light source driving circuit to drive the light source to emit light to the sample to be detected according to a control instruction of an upper computer so as to excite the sample to be detected to reflect or emit light, and controlling the motor driving circuit to drive the N rotating motors to rotate according to the control instruction of the upper computer so as to drive the light source and/or the light receiver and/or the sample rack to move, so as to perform spectrum testing on different test points of the sample to be detected;
the optical receiver is used for receiving the reflected or emitted light of different test points of the sample to be detected and sending the light to the spectrum detector;
the spectrum detector is used for acquiring the light rays reflected or emitted by different test points of the sample to be detected, sampling and performing photoelectric conversion to obtain spectrum detection data of the different test points of the sample to be detected and sending the spectrum detection data to the processor.
10. The spectrometer of claim 9, wherein the N rotating motors comprise a first rotating motor, a second rotating motor, and a third rotating motor, the first rotating motor being mechanically coupled to the light source, the second rotating motor being mechanically coupled to the light receiver, and the third rotating motor being mechanically coupled to the sample holder.
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