CN110231311B - Portable optical fiber turbidity detection device - Google Patents
Portable optical fiber turbidity detection device Download PDFInfo
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- CN110231311B CN110231311B CN201910451179.5A CN201910451179A CN110231311B CN 110231311 B CN110231311 B CN 110231311B CN 201910451179 A CN201910451179 A CN 201910451179A CN 110231311 B CN110231311 B CN 110231311B
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- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 239000013307 optical fiber Substances 0.000 title claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000003750 conditioning effect Effects 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 239000013308 plastic optical fiber Substances 0.000 claims abstract description 17
- 239000000523 sample Substances 0.000 claims abstract description 14
- 238000004364 calculation method Methods 0.000 claims abstract description 6
- 238000010146 3D printing Methods 0.000 claims description 7
- 230000003993 interaction Effects 0.000 claims description 4
- 230000001143 conditioned effect Effects 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000012086 standard solution Substances 0.000 claims description 3
- 238000012706 support-vector machine Methods 0.000 claims description 3
- 238000012549 training Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 2
- 230000009897 systematic effect Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 9
- 230000003321 amplification Effects 0.000 description 8
- 238000003199 nucleic acid amplification method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
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- 238000012544 monitoring process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Abstract
The application provides a portable optical fiber turbidity detection device which comprises a core board control module, a transmitting module, a probe, a receiving module and a temperature sensor, wherein the core board control module controls the transmitting module to transmit optical signals, the transmitting module and the receiving module are respectively connected with the probe through plastic optical fibers, the receiving module receives the optical signals for conditioning and then transmits the optical signals to the core board control module, the temperature sensor detects the temperature of a water body to be detected and transmits the temperature to the core board control module, the core board control module performs temperature compensation on the received data and performs support vector regression calculation according to a fitting function, and the obtained turbidity value of the water body to be detected is transmitted to an intelligent terminal through a Bluetooth module. The application has the beneficial effects that: when detecting the turbidity of the water body, the probe can be directly immersed in the water body, and APP is used for controlling the transmission and real-time display of data, so that the whole device is small in size, convenient and quick to use and accurate in detection data, and the problems of difficulty in carrying, high cost, low accuracy and the like of the existing turbidity detection device are solved.
Description
Technical Field
The application relates to the technical field of water environment monitoring, in particular to a portable optical fiber turbidity detection device.
Background
With the increasing attention of people to life health and sustainable development of natural environment, the water quality monitoring problem is increasingly paid. Turbidity is the most direct measure of water quality, and therefore turbidity detection is very important. However, some turbidity meters on the market are generally expensive, are large in size and inconvenient to inspect in field, and some turbidity meters are also required to be provided with cleaning devices, so that the equipment structure is complex. These are costly and impractical for water quality monitoring in large water areas, or for life applications, so a need exists for a low cost, portable, simple to operate turbidity sensor. The existing turbidity instrument has relatively fixed readings, certain software needs to be installed on a computer, the installation process is complex, and the application is troublesome. Meanwhile, most turbidity instruments can only be used for detecting collected sample solutions, and the process is complex and is easy to influence.
In addition, the data processing method of the turbidity instrument commonly used at present comprises the following steps: the polynomial interpolation method has the advantages that the precision is greatly influenced by sample points, and the measurement result is greatly influenced due to different selected sample points; the table look-up method is very simple, but the table look-up method is specific to each instrument, and if a plurality of instruments use the same table, deviation can be caused; the piecewise linearity is to divide the measurement curve into a plurality of segments, calculate the slope of the broken line between points through the calibrated point, thus get the calculation formula of each segment, when measuring the data, judge which segment is in at first, then calculate the turbidity value by the calculation formula of this segment, if the standard point produces the error, also influence some segment nearby, but will produce certain error in the specific range to the accuracy, thus make the overall error bigger.
Disclosure of Invention
In view of the foregoing, embodiments of the present application provide a portable fiber optic turbidity detection device.
The embodiment of the application provides a portable optical fiber turbidity detection device, which comprises a core plate control module, a transmitting module, a probe, a receiving module and a temperature sensor, wherein the transmitting module comprises a first transmitter and a second transmitter, the receiving module comprises a first receiver, a second receiver and a signal conditioning circuit, a 3D printing circular ring is arranged on the probe, a first interface, a second interface, a third interface and a fourth interface are uniformly arranged on the 3D printing circular ring, plastic optical fibers are respectively inserted and connected on the first interface, the second interface, the third interface and the fourth interface, the first transmitter is connected with the first interface through one plastic optical fiber, the second transmitter is connected with the second interface through one plastic optical fiber, the first receiver is connected with the third interface through one plastic optical fiber, the second receiver is connected with the fourth interface through a plastic optical fiber, the first receiver and the second receiver are both connected with the signal conditioning circuit, the signal conditioning circuit and the temperature sensor are both connected with the core board control module, the core board control module is respectively connected with the first emitter and the second emitter, the core board control module controls the first emitter and the second emitter to emit light signals in a time sharing way, the first receiver is used for receiving a first transmitted light signal emitted by the first emitter and a second scattered light signal emitted by the second emitter, converting the received signals into a first transmitted voltage signal and a second scattered voltage signal, simultaneously transmitting the first transmitted voltage signal and the second scattered voltage signal to the signal conditioning circuit, the second receiver is used for receiving a second transmission light signal sent by the second transmitter and a first scattering light signal sent by the first transmitter, converting the received signals into a second transmission voltage signal and a first scattering voltage signal, transmitting the second transmission voltage signal and the first scattering voltage signal to the signal conditioning circuit, the signal conditioning circuit is used for conditioning the received two transmission voltage signals and the two scattering voltage signals and transmitting the two transmission voltage signals to the core board control module, the temperature sensor is used for detecting the temperature of a water body to be detected and transmitting the temperature data to the core board control module, the core board control module performs temperature compensation on the first transmission voltage signal, the second transmission voltage signal, the first scattering voltage signal and the voltage signal conditioned by the second scattering voltage signal, the core board control module performs ratio calculation on the temperature-compensated voltage signal, calculates the ratio of the first transmission voltage signal and the first scattering voltage signal as a first ratio, calculates the ratio of the second transmission voltage signal and the second scattering voltage signal as a second ratio, and performs fitting the temperature-compensated first transmission voltage signal, the second transmission voltage signal, the first transmission voltage support ratio, the second scattering voltage signal and the second scattering voltage support vector value, and the second scattering voltage vector value to be detected, and fitting the calculated value to obtain the turbidity vector.
Further, the signal conditioning circuit includes a first programmable gain amplifying circuit, a second programmable gain amplifying circuit, a multiplexing switch, a first amplifying circuit, a second amplifying circuit, a first band-pass filter, a second band-pass filter, a first effective value converting circuit, a second effective value converting circuit, a first AD converting circuit, and a second AD converting circuit, wherein the first receiver is connected to the first programmable gain amplifying circuit, the first programmable gain amplifying circuit is connected to the multiplexing switch, the multiplexing switch is connected to the first amplifying circuit, the first amplifying circuit is connected to the first band-pass filter, the first band-pass filter is connected to the first effective value converting circuit, the first effective value converting circuit is connected to the first AD converting circuit, and the first AD converting circuit is connected to the core board control module; the second receiver is connected with the second programmable gain amplifying circuit, the second programmable gain amplifying circuit is connected with the multiplexing switch, the multiplexing switch is connected with the second amplifying circuit, the second amplifying circuit is connected with the second band-pass filter, the second band-pass filter is connected with the second effective value converting circuit, the second effective value converting circuit is connected with the second AD converting circuit, the second AD converting circuit is connected with the core board control module, and the core board control module respectively controls the first programmable gain amplifying circuit, the second programmable gain amplifying circuit and the multiplexing switch.
Further, the first receiver and the second receiver are both OPT101 modules, and the OPT101 modules are used for receiving optical signals and IV conversion.
Further, the fitting function is obtained by training the first transmission voltage signal, the second transmission voltage signal, the first scattering voltage signal, the second scattering voltage signal, the first ratio and the second ratio after temperature compensation by using a support vector machine according to data acquired by the core board control module by detecting the international standard solutions with different turbidity values.
Further, the core board control module drives the first emitter and the second emitter to emit light signals in a time sharing manner, specifically, the core board control module drives the first emitter to emit light signals within a first 0.5 seconds and drives the second emitter to emit light signals within a second 0.5 seconds.
Further, the first programmable gain amplifying circuit and the second programmable gain amplifying circuit both adopt PGA103 chips, the gain of the first programmable gain amplifying circuit and the second programmable gain amplifying circuit to the scattered voltage signal is 100, and the gain of the first programmable gain amplifying circuit and the second programmable gain amplifying circuit to the transmitted voltage signal is 1.
Further, including SD card storage module and bluetooth module, SD card storage module with bluetooth module all connects core board control module, SD card storage module is used for detecting the systematic storage of data and takes out, core board control module passes through bluetooth module wireless connection intelligent terminal and to intelligent terminal conveys detection data, intelligent terminal is equipped with human-computer interaction APP, APP is used for control data transmission and looks over in real time detection data.
The technical scheme provided by the embodiment of the application has the beneficial effects that: when detecting turbidity of a water body, the portable optical fiber turbidity detection device is characterized in that a probe is directly immersed in the water body, a core board control module controls a transmitting module to transmit optical signals, the optical signals transmitted by the transmitting module are transmitted to an interface by plastic optical fibers and are transmitted into the water body, an optical signal receiving module receives optical signals transmitted and scattered by the water body and conditions the received optical signals, meanwhile, the conditioned optical signals are transmitted to the core board control module for data processing, the data processing comprises temperature compensation and Support Vector Regression (SVR), turbidity data of the water body is obtained, and an SD card storage module is connected to the core board control module and can store and take out the detected data in a system; the core board control module is in wireless connection with the intelligent terminal through the Bluetooth module, can transmit detection data to the intelligent terminal, and the intelligent terminal is equipped with supporting human-computer interaction APP, APP is used for controlling data transmission and looks over the detection data of the device in real time. The whole device is small in size, convenient and quick to use, stable in circuit operation and accurate in detection data, and solves the problems that an existing turbidity detection device is not easy to carry, high in cost, low in accuracy and the like.
Drawings
FIG. 1 is a functional block diagram of a portable fiber turbidity detection device according to the present application.
Fig. 2 is a schematic diagram of the connection of the probe 3 with the transmitting module 2 and the receiving module 4 in fig. 1.
Fig. 3 is a functional block diagram of the receiving module 4 in fig. 1.
In the figure: the device comprises a 1-core board control module, a 2-transmitting module, a 21-first transmitter, a 22-second transmitter, a 3-probe, a 31-first interface, a 32-second interface, a 33-third interface, a 34-fourth interface, a 35-3D printing circular ring, a 36-optical fiber, a 4-receiving module, a 41-first receiver, a 41 a-first programmable gain amplifying circuit, a 41 b-first amplifying circuit, a 41 c-first band-pass filter, a 41D-first effective value converting circuit, a 41 e-first AD converting circuit, a 42-second receiver, a 42 a-second programmable gain amplifying circuit, a 42 b-second amplifying circuit, a 42 c-second band-pass filter, a 42D-second effective value converting circuit, a 42 e-second AD converting circuit, a 43-multiplexing switch, a 5-power module, a 6-temperature sensor, a 7-intelligent terminal, an 8-Bluetooth module and a 9-SD card memory module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, an embodiment of the present application provides a portable optical fiber turbidity detection device, which includes a core board control module 1, a transmitting module 2, a probe 3, a receiving module 4, a power module 5, a temperature sensor 6, an intelligent terminal 7, a bluetooth module 8 and an SD card storage module 9.
The emitting module 2 comprises a first emitter 21 and a second emitter 22, the first emitter 21 and the second emitter 22 are near infrared light emitting tubes of 850nm, the first emitter 21 and the second emitter 22 are respectively connected with the core board control module 1, a main control chip adopted by the core board control module 1 is STM32F103RCT6, and the first emitter 21 and the second emitter 22 are all driven by the core board control module 1 in a time sharing way to emit light signals. In this embodiment, the process of driving the first emitter 21 and the second emitter 22 by the core board control module 1 to emit light signals is that, in the previous 0.5 seconds, the first emitter 21 is driven by the core board control module 1 to emit light signals, and in the next 0.5 seconds, the second emitter 22 is driven by the core board control module 1 to emit light signals, so that the time-sharing driving is to avoid the interference of light source signals, and the two paths of light source signals are used for detection, thereby increasing the accuracy of data, reducing the influence of the ambient temperature on the detection device by using temperature compensation, and improving the anti-interference capability.
Referring to fig. 1, 2 and 3, the receiving module 4 includes a first receiver 41, a second receiver 42 and a signal conditioning circuit, where the signal conditioning circuit includes a first programmable gain amplifying circuit 41a, a second programmable gain amplifying circuit 42a, a multiplexing switch 43, a first amplifying circuit 41b, a second amplifying circuit 42b, a first bandpass filter 41c, a second bandpass filter 42c, a first effective value converting circuit 41d, a second effective value converting circuit 42d, a first AD converting circuit 41e and a second AD converting circuit 42e, the first receiver 41 is connected to the first programmable gain amplifying circuit 41a, the first programmable gain amplifying circuit 41a is connected to the multiplexing switch 43, the multiplexing switch 43 is connected to the first amplifying circuit 41b, the first amplifying circuit 41b is connected to the first bandpass filter 41c, the first bandpass filter 41c is connected to the first effective value converting circuit 41d, the first AD converting circuit 41d is connected to the first AD converting circuit 41e, and the first AD converting circuit 41e is connected to the first core converting module 1; the second receiver 42 is connected to the second programmable gain amplifying circuit 42a, the second programmable gain amplifying circuit 42a is connected to the multiplexing switch 43, the multiplexing switch 43 is connected to the second amplifying circuit 42b, the second amplifying circuit 42b is connected to the second band-pass filter 42c, the second band-pass filter 42c is connected to the second effective value converting circuit 42d, the second effective value converting circuit 42d is connected to the second AD converting circuit 42e, and the second AD converting circuit 42e is connected to the core board control module 1.
The first optical signal receiver 41 and the second optical signal receiver 42 are both OPT101 modules, the OPT101 modules are used for receiving optical signals and IV converting, and the first optical signal receiver 41 and the second optical signal receiver 42 are both used for converting received optical signals into current signals first and then converting the current signals into voltage signals by IV converting.
The first receiver 41 is configured to receive a first transmitted light signal that the first transmitter 21 in the previous 0.5s is transmitted through the water to be measured in a straight line, and a second scattered light signal that the second transmitter 22 in the next 0.5s is transmitted through the water to be measured in a direction perpendicular to the transmission direction and is converted into a first transmitted voltage signal and a second scattered voltage signal, and simultaneously transmit the first transmitted voltage signal and the second scattered voltage signal to the first programmable gain amplification circuit 41a, the second receiver 42 is configured to receive a second transmitted light signal that the second transmitter 22 in the next 0.5s is transmitted through the water to be measured in a straight line, and a first scattered light signal that the first transmitter 21 in the previous 0.5s is transmitted through the water to be measured in a direction perpendicular to the transmission direction and is converted into a second transmitted voltage signal and a first scattered voltage signal, simultaneously transmitting a second transmission voltage signal and a first scattering voltage signal to the second programmable gain amplification circuit 42a, wherein the first programmable gain amplification circuit 41a and the second programmable gain amplification circuit 42a are used for amplifying the received second scattering voltage signal and the received first scattering voltage signal and transmitting the amplified first scattering voltage signal and the received first scattering voltage signal to the multiplexing switch 43, the multiplexing switch 43 is used for respectively outputting the received first transmission voltage signal, the first scattering voltage signal and the second transmission voltage signal amplified by the second programmable gain amplification circuit 42a, the second scattering voltage signal amplified by the first programmable gain amplification circuit 41a in a time-sharing way, and transmitting the signals to the first amplification circuit 41b and the second amplification circuit 42b, the first band-pass filter 41c and the second band-pass filter 42c are used for filtering the voltage signals to filter noise except 1KHz, the first effective value conversion circuit 41d and the second effective value conversion circuit 42d are configured to take an effective value of the filtered voltage signal and output the effective value to the first AD conversion circuit 41e and the second AD conversion circuit 42e, and the first AD conversion circuit 41e and the second AD conversion circuit 42e are configured to convert analog signals input by the first effective value conversion circuit 41d and the second effective value conversion circuit 42d into digital signals and transmit the digital signals to the core board control module 1.
The probe 3 is provided with a 3D printing ring 35, the 3D printing ring 35 is uniformly provided with a first interface 31, a second interface 32, a third interface 33 and a fourth interface 34, the first interface 31, the second interface 32, the third interface 33 and the fourth interface 34 are respectively provided with a plastic optical fiber 36, the first transmitter 21 is connected with the first interface 32 through the plastic optical fiber 36, the second transmitter 22 is connected with the second interface 33 through the plastic optical fiber 36, the first receiver 41 is connected with the third interface 34 through the plastic optical fiber 36, and the second receiver 42 is connected with the fourth interface 35 through the plastic optical fiber 36.
The temperature sensor 6 is a DS18B20 digital temperature sensor, and the temperature sensor 6 is used for detecting the temperature of the water body to be detected and transmitting the temperature data to the core board control module 1.
The core board control module 1 calculates a first ratio of a first transmission voltage signal to a first scattering voltage signal, the core board control module 1 calculates a second ratio of a second transmission voltage signal to a second scattering voltage signal, and performs temperature compensation on the first transmission voltage signal, the second transmission voltage signal, the first scattering voltage signal, the second scattering voltage signal, the first ratio and the second ratio, then substitutes the temperature compensation into a fitting function to perform support vector regression calculation to obtain a turbidity value of a water body to be detected, wherein the fitting function is obtained by the core board control module 1 according to data acquired when detecting international standard solutions with different turbidity values, and training the temperature compensated first transmission voltage signal, second transmission voltage signal, the first scattering voltage signal, the second scattering voltage signal, the first ratio and the second ratio by using a support vector machine to build a model.
The core board control module 1 and the receiving module 4 are both connected with the power module 5, and the power module 5 is a chargeable 12V lithium battery.
The core board control module 1 is further connected with a Bluetooth module 8 and an SD card storage module 9 respectively, the Bluetooth module 8 is a master-slave integrated Bluetooth serial port module and is used for transmitting turbidity data of a water body to be detected to the intelligent terminal 7, the Bluetooth module 8 is in wireless connection with the intelligent terminal 7 and transmits the turbidity data of the water body to be detected to the intelligent terminal 7, the intelligent terminal 7 is a mobile phone or a computer, the intelligent terminal 7 is provided with a man-machine interaction APP, the APP is used for controlling the Bluetooth module 8 and displaying the turbidity data of the water body to be detected, and the SD card storage module 9 is used for detecting system storage of data including the turbidity data.
In this document, terms such as front, rear, upper, lower, etc. are defined with respect to the positions of the components in the drawings and with respect to each other, for clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed application.
The embodiments described above and features of the embodiments herein may be combined with each other without conflict.
The foregoing description of the preferred embodiments of the application is not intended to limit the application to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the application are intended to be included within the scope of the application.
Claims (7)
1. The utility model provides a portable optic fibre turbidity detection device which characterized in that: comprises a core plate control module, a transmitting module, a probe, a receiving module and a temperature sensor, wherein the transmitting module comprises a first transmitter and a second transmitter, the receiving module comprises a first receiver, a second receiver and a signal conditioning circuit, a 3D printing circular ring is arranged on the probe, a first interface, a second interface, a third interface and a fourth interface are uniformly arranged on the 3D printing circular ring, a plastic optical fiber is inserted and connected on the first interface, the second interface, the third interface and the fourth interface, the first transmitter is connected with the first interface through a plastic optical fiber, the second transmitter is connected with the second interface through a plastic optical fiber, the first receiver is connected with the third interface through a plastic optical fiber, the second receiver is connected with the fourth interface through a plastic optical fiber, the first receiver and the second receiver are both connected with the signal conditioning circuit, the signal conditioning circuit and the temperature sensor are both connected with the core board control module, the core board control module is respectively connected with the first emitter and the second emitter, the core board control module controls the first emitter and the second emitter to emit light signals in a time sharing way, the first receiver is used for receiving a first transmitted light signal emitted by the first emitter and a second scattered light signal emitted by the second emitter, converting the received signals into a first transmitted voltage signal and a second scattered voltage signal, simultaneously transmitting the first transmitted voltage signal and the second scattered voltage signal to the signal conditioning circuit, the second receiver is used for receiving a second transmission light signal sent by the second transmitter and a first scattering light signal sent by the first transmitter, converting the received signals into a second transmission voltage signal and a first scattering voltage signal, transmitting the second transmission voltage signal and the first scattering voltage signal to the signal conditioning circuit, the signal conditioning circuit is used for conditioning the received two transmission voltage signals and the two scattering voltage signals and transmitting the two transmission voltage signals to the core board control module, the temperature sensor is used for detecting the temperature of a water body to be detected and transmitting the temperature data to the core board control module, the core board control module performs temperature compensation on the first transmission voltage signal, the second transmission voltage signal, the first scattering voltage signal and the voltage signal conditioned by the second scattering voltage signal, the core board control module performs ratio calculation on the temperature-compensated voltage signal, calculates the ratio of the first transmission voltage signal and the first scattering voltage signal as a first ratio, calculates the ratio of the second transmission voltage signal and the second scattering voltage signal as a second ratio, and performs fitting the temperature-compensated first transmission voltage signal, the second transmission voltage signal, the first transmission voltage support ratio, the second scattering voltage signal and the second scattering voltage support vector value, and the second scattering voltage vector value to be detected, and fitting the calculated value to obtain the turbidity vector.
2. A portable optical fiber turbidity detection apparatus as defined in claim 1, wherein: the signal conditioning circuit comprises a first programmable gain amplifying circuit, a second programmable gain amplifying circuit, a multiplexing switch, a first amplifying circuit, a second amplifying circuit, a first band-pass filter, a second band-pass filter, a first effective value converting circuit, a second effective value converting circuit, a first AD converting circuit and a second AD converting circuit, wherein the first receiver is connected with the first programmable gain amplifying circuit, the first programmable gain amplifying circuit is connected with the multiplexing switch, the multiplexing switch is connected with the first amplifying circuit, the first amplifying circuit is connected with the first band-pass filter, the first band-pass filter is connected with the first effective value converting circuit, the first effective value converting circuit is connected with the first AD converting circuit, and the first AD converting circuit is connected with the core board control module; the second receiver is connected with the second programmable gain amplifying circuit, the second programmable gain amplifying circuit is connected with the multiplexing switch, the multiplexing switch is connected with the second amplifying circuit, the second amplifying circuit is connected with the second band-pass filter, the second band-pass filter is connected with the second effective value converting circuit, the second effective value converting circuit is connected with the second AD converting circuit, the second AD converting circuit is connected with the core board control module, and the core board control module respectively controls the first programmable gain amplifying circuit, the second programmable gain amplifying circuit and the multiplexing switch.
3. A portable optical fiber turbidity detection apparatus as defined in claim 1, wherein: the first receiver and the second receiver are both OPT101 modules, and the OPT101 modules are used for receiving optical signals and converting IV.
4. A portable optical fiber turbidity detection apparatus as defined in claim 1, wherein: the fitting function is obtained by training a first transmission voltage signal, a second transmission voltage signal, a first scattering voltage signal, a second scattering voltage signal, a first ratio and a second ratio after temperature compensation by using a support vector machine according to data acquired by the core board control module by detecting international standard solutions with different turbidity values.
5. A portable optical fiber turbidity detection apparatus as defined in claim 1, wherein: the core board control module drives the first emitter and the second emitter to emit light signals in a time sharing mode, specifically, the core board control module drives the first emitter to emit light signals within a first 0.5 seconds and drives the second emitter to emit light signals within a second 0.5 seconds.
6. A portable optical fiber turbidity detection apparatus as defined in claim 2, wherein: the first programmable gain amplifying circuit and the second programmable gain amplifying circuit both adopt PGA103 chips, the gain of the first programmable gain amplifying circuit and the second programmable gain amplifying circuit to scattering voltage signals is 100, and the gain of the first programmable gain amplifying circuit and the second programmable gain amplifying circuit to transmission voltage signals is 1.
7. A portable optical fiber turbidity detection apparatus as defined in claim 1, wherein: including SD card storage module and bluetooth module, SD card storage module with bluetooth module all connects core board control module, SD card storage module is used for detecting the systematic storage of data and takes out, core board control module passes through bluetooth module wireless connection intelligent terminal and to intelligent terminal conveys detection data, intelligent terminal is equipped with human-computer interaction APP, APP is used for control data transmission and looks over in real time detection data.
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| CN201910451179.5A CN110231311B (en) | 2019-05-28 | 2019-05-28 | Portable optical fiber turbidity detection device |
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| CN201910451179.5A CN110231311B (en) | 2019-05-28 | 2019-05-28 | Portable optical fiber turbidity detection device |
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| CN110987876A (en) * | 2019-12-24 | 2020-04-10 | 上海蓝长自动化科技有限公司 | Wide-range optical turbidity detection equipment and detection method thereof |
| CN113720803A (en) * | 2021-07-15 | 2021-11-30 | 常州罗盘星检测科技有限公司 | Method and system for online simultaneous detection of low-concentration and high-concentration floating water at low temperature and high temperature |
| CN114295584B (en) * | 2021-12-30 | 2023-08-04 | 中国地质大学（武汉） | Mud sand content online detection device and method based on scattering type infrared turbidimeter |
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