CN204101462U - A kind of Raman spectrum water quality in-situ monitoring device - Google Patents

Abstract

The utility model relates to a kind of Raman spectrum water quality in-situ monitoring device, utilizes pulse signal generator to control micro-step motor and cleans light form; Then, open semiconductor laser generator generation laser, enter water body in purge chamber through incident optical probe; Raman spectrum receives fibre-optical probe and carry out signal conversion by CCD photoelectric detector after optical filter removing Rayleigh scattering, utilizes signal amplifier to amplify signal and strengthens; Utilize A/D signal converter to carry out modulus signal conversion, data are preserved and display, by 3G signal projector or RS485 interface, data are finally reached computing machine.Theory structure is simple, and detect reagent without the need to consuming, easy to operate, measuring accuracy is high, can realize probe apparatus simultaneously and automatically clean, can be used for the water quality in-situ monitorings such as river, field, lake, sewage, be with a wide range of applications.

Description

A Raman spectroscopy water quality in-situ monitoring device

technical field

The utility model belongs to the technical field of water quality detection devices, in particular to a Raman spectrum water quality in-situ monitoring device, which can realize the self-cleaning function of a monitoring probe at the same time.

Background technique

With the rapid development of economy and society, the problem of water environment pollution is becoming more and more serious, and it is imperative to implement water environment pollution control and governance. Task. The current real-time water quality monitoring methods mainly include traditional chemical analysis, electrochemical analysis and spectral analysis, etc. Among them, chemical analysis detection requires sample collection and detection reagent consumption, which takes a long time. In comparison, the spectral analysis method does not require detection reagents and has advantages such as convenience and speed. It is very suitable for rapid online monitoring of water quality in rivers, lakes, urban sewage and other water bodies. Spectral analysis methods mainly include absorption spectroscopy, fluorescence spectroscopy, hyperspectral remote sensing, Raman spectroscopy, etc. Among them, atomic absorption spectroscopy has high detection accuracy, but it consumes high energy and is large in size, so it is not suitable for real-time monitoring in the field; hyperspectral remote sensing The accuracy of the method is low, and it is mostly used for qualitative analysis; the fluorescence analysis method only has a strong advantage in the detection of organic substances with fluorescence effects, and there are certain limitations; while Raman spectroscopy can comprehensively, quickly and effectively detect the composition of substances in water, and is suitable for various It is often used for indoor detection and in-situ monitoring of water quality in the field. Especially when the monitoring probe is placed in the water body for a long time, pollutants will be attached to the light window of the probe, and the detection results will be inaccurate, which requires frequent cleaning. .

Contents of the invention

In view of the above problems, the purpose of this utility model is to provide a Raman spectroscopy water quality in-situ monitoring device to solve the problem of Raman spectroscopy water quality field monitoring application and the device cannot be self-cleaning, and to facilitate in-situ real-time monitoring of water quality in the field.

The technical solution adopted by the utility model to solve the technical problem is: a Raman spectrum water quality in-situ monitoring device, including a fixed rod, a power supply device, a semiconductor laser generator, a Raman spectrum acquisition device, a control single-chip microcomputer, a signal processing module, A data processing module and a self-cleaning device, the Raman spectrum acquisition device includes a filter, an incident optical fiber probe, a receiving optical fiber probe, and a CCD photodetector; the signal processing module includes a signal amplifier and an A/D signal converter; the data processing module Including data storage and display, 3G signal transmitter; self-cleaning device includes pulse signal generator, cleaning chamber, micro-stepping motor, connecting rod, cleaning piston, filter screen.

Specifically, the power supply device and the cleaning chamber are fixed on the fixed rod, the power supply device is connected with the control single-chip microcomputer, the pulse signal generator is connected with the micro-stepping motor, the micro-stepping motor is located at one end of the cleaning chamber, and the other end of the cleaning chamber is set There is a filter screen, a cleaning piston is installed in the cleaning room, and the cleaning piston is connected to the stepping motor through a connecting rod. The bottom of the cleaning room is equipped with a water outlet, the top of the cleaning room is equipped with a light window, and the top of the cleaning room is also equipped with an incident light probe. And the receiving fiber probe, the incident light probe is connected with the semiconductor laser transmitter, the receiving fiber probe is connected with the filter, and the filter passes through the CCD photodetector, signal amplifier, A/D signal converter, data storage and display, 3G The signal transmitter is connected with the computer.

Specifically, the control single-chip microcomputer is connected and controlled with semiconductor laser generator, pulse signal generator, CCD photodetector, signal amplifier, A/D signal converter, data storage and display, and 3G signal transmitter. The control center of the body device, when performing a measurement, first gives instructions by controlling the single-chip microcomputer.

Specifically, considering the inconvenience of field power supply conditions, the power supply device adopts a wind-solar hybrid power supply device.

The utility model has the following beneficial effects: the utility model uses a pulse signal generator to control a micro-stepping motor to clean the optical window; then, the semiconductor laser generator is turned on to generate laser light, and enters the water body in the cleaning room through the incident optical fiber probe; Raman spectrum The receiving optical fiber probe passes through the optical filter to remove Rayleigh scattering, and then converts the signal through the CCD photodetector, and uses the signal amplifier to amplify and enhance the signal; uses the A/D signal converter to convert the analog-to-digital signal, saves and displays the data, and passes the 3G signal Transmitter or RS485 interface will finally transmit the data to the computer. The principle and structure are simple, no consumption of detection reagents is required, the operation is convenient, the measurement accuracy is high, and the probe device can be automatically cleaned. It can be used for in-situ monitoring of water quality in wild rivers, lakes, sewage, etc., and has a wide application prospect.

Description of drawings

Fig. 1 is a structural representation of the utility model.

In the figure, 1. Fixed rod, 2. Power supply device, 3. Pulse signal generator, 4. Semiconductor laser generator, 5. Control single-chip microcomputer, 6. Optical filter, 7. CCD photodetector, 8. Signal amplifier, 9. A/D signal converter, 10. Data storage and display, 11. 3G signal transmitter, 12. Incident optical fiber probe, 13. Receiving optical fiber probe, 14. Optical window, 15. Cleaning room, 16. Filter screen, 17, cleaning piston, 18, water outlet hole, 19, connecting rod, 20, miniature stepper motor, 21, computer.

Detailed ways

Now in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, a Raman spectrum water quality in-situ monitoring device includes a fixed rod 1, a power supply device 2, a semiconductor laser generator 4, a Raman spectrum acquisition device, a control single-chip microcomputer 5, a signal processing module, a data processing module, Self-cleaning device, the Raman spectrum collection device includes optical filter 6, incident optical fiber probe 12, receiving optical fiber probe 13, CCD photodetector 7; Signal processing module includes signal amplifier 8, A/D signal converter 9; Data The processing module includes a data storage and display 10, a 3G signal transmitter 11; the self-cleaning device includes a pulse signal generator 3, a cleaning chamber 15, a micro stepper motor 20, a connecting rod 19, a cleaning piston 17, and a filter screen 16.

Specifically, the power supply device 2 and the cleaning chamber 15 are fixed on the fixed rod 1, the power supply device 2 is connected with the control microcontroller 5, the pulse signal generator 3 is connected with the micro stepping motor 20, and the micro stepping motor 20 is located in the cleaning chamber 15 The other end of the cleaning chamber 15 is provided with a filter screen 16, the cleaning chamber 15 is provided with a cleaning piston 17, the cleaning piston 17 is connected with the stepping motor 20 through a connecting rod 19, and the bottom of the cleaning chamber 15 is provided with a water outlet hole 18, The top of cleaning chamber 15 is provided with optical window 14, and the top of cleaning chamber 15 is also provided with incident light probe 12 and receiving optical fiber probe 13, and incident light probe 12 is connected with semiconductor laser transmitter 4, and receiving optical fiber probe 13 and optical filter 6 Connection, the optical filter 6 is connected with the computer 21 through the CCD photodetector 7 , the signal amplifier 8 , the A/D signal converter 9 , the data storage and display 10 , and the 3G signal transmitter 11 in sequence.

Specifically, the control single-chip microcomputer 5 and semiconductor laser generator 4, pulse signal generator 3, CCD photodetector 7, signal amplifier 8, A/D signal converter 9, data storage and display 10, 3G signal transmitter 11 Connection control, the control single-chip microcomputer is the control center of all split devices. When performing a measurement, first give instructions through the control single-chip microcomputer.

Specifically, considering the inconvenience of field power supply conditions, the power supply device 2 adopts a wind-solar hybrid power supply device.

Specifically, the pulse signal generator is used to control the micro stepping motor to automatically clean the optical window. After the cleaning is completed, the semiconductor laser generator is turned on by controlling the single-chip microcomputer to generate laser light, and enters the water body in the cleaning room through the incident optical fiber probe; after the laser light enters the water body, It will generate Rayleigh scattering or fluorescence and other impurity signals other than the Raman spectrum signal. After the optical signal is initially collected by the receiving fiber optic probe, the Rayleigh scattering and fluorescence spectrum signals are removed by the filter, and then transmitted to the CCD photodetector for photoelectric signal. Conversion; usually because the Raman signal is weak, it is necessary to use the signal amplifier for signal amplification and enhancement, and at the same time use the A/D signal converter for analog-to-digital signal conversion to realize the conversion from optical signal to digital signal, and perform data storage and display; The collected data is transmitted to the computer terminal through the 3G signal transmitter or RS485 interface for data analysis and processing.

The utility model is not limited to the above-mentioned embodiment, and anyone should know that the structural changes made under the enlightenment of the utility model, all technical solutions that are the same as or similar to the utility model, all fall within the scope of protection of the utility model Inside.

The technologies, shapes and construction parts not described in detail in the utility model are all known technologies.

Claims (4)

1. A Raman spectrum water quality in-situ monitoring device, is characterized in that, comprises fixed rod, power supply unit, semiconductor laser generator, Raman spectrum acquisition device, control single-chip microcomputer, signal processing module, data processing module, self-cleaning device, The Raman spectrum acquisition device includes a filter, an incident optical fiber probe, a receiving optical fiber probe, and a CCD photodetector; the signal processing module includes a signal amplifier, an A/D signal converter; the data processing module includes a data storage and a display, a 3G signal The transmitter; the self-cleaning device includes a pulse signal generator, a cleaning chamber, a micro-stepping motor, a connecting rod, a cleaning piston, and a filter screen. 2. Raman spectrum water quality in-situ monitoring device according to claim 1, is characterized in that, described power supply unit and cleaning chamber are fixed on the fixed rod, power supply unit is connected with control single-chip microcomputer, pulse signal generator and micro-stepper The motor is connected, the micro stepper motor is located at one end of the cleaning chamber, the other end of the cleaning chamber is provided with a filter, the cleaning chamber is provided with a cleaning piston, the cleaning piston is connected with the stepping motor through a connecting rod, and the bottom of the cleaning chamber is provided with a water outlet. The top of the cleaning room is equipped with a light window, and the top of the cleaning room is also equipped with an incident light probe and a receiving optical fiber probe. The incident light probe is connected to the semiconductor laser transmitter, and the receiving optical fiber probe is connected to the optical filter. Detector, signal amplifier, A/D signal converter, data storage and display, 3G signal transmitter are connected with computer. 3. Raman spectrum water quality in-situ monitoring device according to claim 1, is characterized in that, described control single-chip microcomputer and semiconductor laser generator, pulse signal generator, CCD photodetector, signal amplifier, A/D signal conversion Device, data storage and display, 3G signal transmitter connection control. 4. The Raman spectroscopy water quality in-situ monitoring device according to claim 1, wherein the power supply device adopts a wind-solar hybrid power supply device.