WO2019080013A1 - Procédé et appareil de détection raman, support de stockage et dispositif électronique - Google Patents

Procédé et appareil de détection raman, support de stockage et dispositif électronique

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Publication number
WO2019080013A1
WO2019080013A1 PCT/CN2017/107687 CN2017107687W WO2019080013A1 WO 2019080013 A1 WO2019080013 A1 WO 2019080013A1 CN 2017107687 W CN2017107687 W CN 2017107687W WO 2019080013 A1 WO2019080013 A1 WO 2019080013A1
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WO
WIPO (PCT)
Prior art keywords
time period
information
raman
collected
collection
Prior art date
Application number
PCT/CN2017/107687
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English (en)
Chinese (zh)
Inventor
骆磊
Original Assignee
深圳达闼科技控股有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳达闼科技控股有限公司 filed Critical 深圳达闼科技控股有限公司
Priority to PCT/CN2017/107687 priority Critical patent/WO2019080013A1/fr
Priority to CN201780002459.7A priority patent/CN107980093A/zh
Publication of WO2019080013A1 publication Critical patent/WO2019080013A1/fr

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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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/65—Raman scattering
    • 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
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/65—Raman scattering
    • G01N2021/653—Coherent methods [CARS]
    • G01N2021/655—Stimulated Raman

Definitions

  • the present disclosure relates to the field of substance detection, and in particular, to a Raman detection method, device, storage medium, and electronic device.
  • Raman detection equipment uses Raman scattering to detect the composition of substances. It is currently used in many fields, including professional oil exploration, drug testing, common safety inspections in life, anti-narcotics, etc., and with Raman detection. The cost of equipment is declining and there are more applications in the civilian market, such as pesticide testing, real and fake inspection.
  • the current Raman inspection equipment uses non-contact detection, and it is necessary to manually focus the focus of the laser on the item to be tested. Specifically, during the detection process, the Raman detection device turns on the laser for the first half of the time to illuminate the object to be tested and collects the Raman spectrum, and turns off the laser for the second half of the time, but still maintains the original holding posture, and starts the sensor collecting circuit and ambient light. Interference information. For example, the entire detection collection process is 4 seconds, the first 2s laser illuminates the item, and the 2 s laser closes and collects interference information such as ambient light and circuit noise. The final test results need to subtract the interference information collected from the Raman spectrum collected in the first half of the second half of the time.
  • the prior art uses the interference information detected in the latter half of time to characterize the interference information existing in the process of collecting the Raman spectrum by the Raman detecting device in the first half time.
  • the ambient light in the first half of the time and the ambient light in the second half of the time are not necessarily the same.
  • the artificial grip posture may not be consistent, so the background interference subtracted when calculating the final test result is not accurate, and thus affects The accuracy of the substance test results.
  • the present disclosure provides a Raman detection method, apparatus, storage medium, and electronic device for solving the problem that the detection result of the substance is inaccurate due to insufficient background interference acquisition.
  • a Raman detecting method comprising:
  • the n takes a positive odd value from 1 until the collection of information is completed, wherein the n+1th time period is the next time period of the nth time period, and the nth time period is The duration of the (n+1)th time period is the same;
  • a Raman detecting apparatus comprising:
  • An information collecting module configured to turn on the laser at the beginning of the nth time period to illuminate the object to be measured and collect Raman spectrum information in the nth time period, and turn off the laser at the n+1th time period and at the n+1th
  • the background interference information is collected in a time period, and the n takes a positive odd value from 1 until the collection of the information is completed, wherein the n+1th time period is the next time period of the nth time period.
  • the period of time n is the same as the duration of the (n+1)th time period;
  • An information processing module configured to subtract the background interference information collected in the (n+1)th time period from the Raman spectrum information collected in the nth time period to obtain sub-Raman spectrum information And superimposed data of all the sub-Raman spectral information is taken as a Raman detection result.
  • a computer readable storage medium including one or more programs for performing the first embodiment of the present disclosure The method described on the one hand.
  • an electronic device comprising: the computer readable storage medium of the third aspect of the embodiments of the present disclosure;
  • One or more processors for executing a program in the computer readable storage medium.
  • the time granularity of continuously emitting laser to collect Raman spectral information is smaller, and the two processes of laser emission collecting Raman spectral information and laser closing collecting background interference information can be alternately performed at high frequency, thereby avoiding ambient light.
  • the change or the change of the user's hand-held posture causes the noise difference between the Raman spectrum collection stage and the background interference collection stage to be too large, thereby improving the accuracy of the background subtraction operation, thereby improving the accuracy of the substance detection.
  • FIG. 1 is a schematic flow chart of a method for Raman detection according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flow chart of collecting Raman spectrum information according to an embodiment of the present disclosure
  • FIG. 3 is a schematic flow chart of another method for collecting Raman spectrum information according to an embodiment of the present disclosure
  • FIG. 4 is a block diagram of an apparatus for Raman detection provided in accordance with an embodiment of the present disclosure.
  • FIG. 5 is a block diagram of an electronic device provided in accordance with an embodiment of the present disclosure.
  • the application scenario is to perform substance detection on the object to be measured by using a Raman detecting device, and the Raman detecting device is provided with a laser emitter and a spectrometer sensor.
  • FIG. 1 is a flowchart of a Raman detection method according to an embodiment of the present disclosure. As shown in FIG. 1, the method includes:
  • the n+1th time period is the next time period of the nth time period, and the nth time period is the same as the duration of the n+1th time period.
  • the Raman detection device is subject to interference caused by ambient light and circuit noise when collecting the Raman spectrum information of the object to be measured under laser irradiation.
  • the background interference information is ambient light and circuit. Interference spectrum information caused by noise, etc.
  • the Raman detecting device may include a timer that starts timing when the Raman detecting device starts emitting laser light to the test substance and collects Raman spectrum information using the spectrometer sensor, and after counting to the end of determining the length of the first time period
  • the laser is turned off and the background interference information is collected by the spectrometer sensor.
  • the second time period is started, and the time is continued until the end of the second time period is determined.
  • the laser is turned on and the Raman spectral information is collected by the spectrometer sensor to start the third time period. This cycle is performed alternately until the collection of information is completed. For example, if the Raman detecting device is scheduled to have the total information collecting time information, the collection is stopped when the counting reaches the end of the predetermined total time.
  • the duration of the nth time period is the same as that of the n+1th time period, that is, the duration of the laser collection Raman spectrum is turned on in the previous period and the background interference information is turned off in the latter period.
  • the duration is the same. Therefore, in the case where the total information collection time is scheduled, an even number of time periods of the same duration can be divided in advance, the laser collection Raman spectrum is turned on in the odd time period, and the laser collection background is turned off in the even time period. Interference information.
  • the time granularity of collecting the Raman spectrum information by the continuous emission laser is smaller, and the laser emission collecting Raman spectrum information and the laser off collecting the background interference information can be alternately performed at a high frequency, thereby avoiding The change of ambient light or the change of the hand posture before and after the user causes the noise difference between the Raman spectrum collection stage and the background interference collection stage to be too large, thereby improving the accuracy of the background subtraction operation and improving the accuracy of the substance detection.
  • the Raman detecting device is scheduled to have a total duration T of information collection.
  • the step of collecting the spectral information represented by the above step S11 is specifically Can include:
  • the total duration T of information collection is divided into m time segments, each time period has the same duration, and m is an even number greater than 2.
  • S113 Turn on the laser to irradiate the object to be tested at the beginning of the nth time period, and collect Raman spectrum information in the nth time period.
  • S114 At the end of the duration of the nth time period, record sensor data collected by the spectrometer sensor, obtain Raman spectrum information, and clear sensor data of the spectrometer sensor.
  • step S118 is performed, and if n+1 is equal to m, step S119 is performed.
  • each collected data can be recorded in the manner shown in Table 1 below.
  • each set of data in Table 1 is subjected to a separate background subtraction, ie (spectrum 1 - noise 1), (spectrum 2 - noise 2), ..., (spectrum m/2 - noise m /2), each sub-Raman spectrum information is obtained.
  • data is superimposed on each sub-Raman spectral information to obtain a final background subtracted Raman spectrum information, and submitted to the next pre-processing operation to detect the substance of the object to be tested.
  • the method step shown in FIG. 2 is an example in the case where the total information collection duration T and the number of time segments m are predetermined.
  • the duration t of each time period may also be predetermined.
  • N should be equal to 13
  • N+1 is equal to 14
  • T/t 12.3
  • N should be equal to 13
  • N+1 is equal to 14
  • the Raman detecting device may also determine whether to stop collecting based on the total amount of spectral collection in the information collecting process.
  • the above step S11 The step of collecting the spectral information represented may specifically include:
  • n is assigned an initial value of 1.
  • S1102 Turn on the laser to irradiate the object to be tested at the beginning of the nth time period, and collect Raman spectrum information in the nth time period.
  • S1103 At the end of the duration of the nth time period, record the sensor data collected by the spectrometer sensor, obtain Raman spectrum information, and clear the sensor data of the spectrometer sensor.
  • S1104 Turn off the laser at the beginning of the (n+1)th time period and collect background interference information during the (n+1)th time period.
  • S1105 At the end of the duration of the n+1th period, record the sensor data collected by the spectrometer sensor, obtain background interference information, and clear the sensor data of the spectrometer sensor.
  • S1106 superimpose all the Raman spectral information currently collected to obtain superimposed data, and extract peaks in the superimposed data.
  • S1107 Determine whether the peak reaches a predetermined threshold.
  • step S1108 is performed, if the peak reaches the pre- If the threshold is determined, step S1109 is performed.
  • the method embodiment shown in FIG. 3 can record the data collected each time by the method shown in Table 2 below.
  • the spectral data (spectrum 1+spectrum 2+...+spectrum n) in each set of data is superimposed and peaked. Operation, if the peak does not reach the predetermined threshold (eg, the peak height exceeds 50,000), the collection of data is continued, and if the peak of the superimposed data reaches or exceeds the predetermined threshold, the collection is stopped.
  • the predetermined threshold eg, the peak height exceeds 50,000
  • each time the spectral data is collected each time the spectral data is collected, each set of spectral data currently collected may be superimposed, and it is determined whether the peak value of the superposed spectral data reaches a predetermined threshold. When the peak reaches the predetermined threshold, it is necessary to collect another period of noise data to stop the information collection.
  • a predetermined threshold When the peak reaches the predetermined threshold, it is necessary to collect another period of noise data to stop the information collection.
  • the spectrometer sensor for the Raman detection device is received The storage of the collected data, after the end of the nth time period, the sensor data of the spectrometer sensor is recorded, and the spectrometer sensor is cleared to obtain the pull collected in the nth time period. Mannographic information; after the end of the (n+1)th time period, recording sensor data of the spectrometer sensor, and clearing the spectrometer sensor to obtain the background interference collected in the (n+1)th time period information. In this way, the sensor data detected by the spectrometer sensor is ensured to be the spectral data separately detected in each time period, which avoids additional steps of distinguishing data and improves the detection efficiency.
  • the sensor data and the corresponding time of each time period may be stored as one record in one table, or the sensor data may be stored in a LIFO according to the order of the recording time (English: Last) In First Out, Chinese: Last In, First Out).
  • the superimposed data of all the sub-Raman spectra is obtained in step S12
  • the superimposed data may be pre-processed, including: denoising, base subtraction, and normalization processing. And performing material identification on the object to be tested by using a Raman recognition algorithm according to the superposed data after preprocessing.
  • the pre-processed superimposed data is a Raman spectrum that reflects the material properties. Since the Raman spectrum information of different substances is fixed and unique, the Raman spectrum can be analyzed for substance identification.
  • the apparatus includes:
  • the information collecting module 401 is configured to turn on the laser at the start time of the nth time period to illuminate the object to be tested and collect the Raman spectrum information in the nth time period, and turn off the laser at the n+1th time period and at the n+th
  • the background interference information is collected in a period of time, and the n takes a positive odd value from 1 until the collection of the information is completed, wherein the n+1th time period is the next time period of the nth time period, The duration of the nth time period is the same as the duration of the (n+1)th time period;
  • An information processing module 402 configured to collect the Raman spectral information in the nth time period
  • the background interference information collected in the (n+1)th time period is subtracted from the information to obtain sub-Raman spectrum information, and the superimposed data of all the sub-Raman spectrum information is used as a Raman detection result.
  • the information collection module 401 is configured to:
  • n is taken from the beginning of 1 to obtain a positive odd value until n is equal to N, the laser is turned off at the start time of the (N+1)th time period, and the background interference information is collected in the (N+1)th time period, and the information collection is stopped;
  • T is the predetermined total duration of information collection
  • t is the duration of the predetermined nth time period
  • the information collection module 401 is configured to:
  • the Raman spectral information collected by all the time periods in which the Raman spectral information is collected is superimposed, and it is determined whether the peak value in the superimposed data reaches a predetermined threshold;
  • the collection of information is stopped.
  • the information collecting module is further configured to: after the end of the nth time period, record sensor data of the spectrometer sensor, and clear the spectrometer sensor to obtain the collected time in the nth time period.
  • Raman spectral information after the end of the n+1th time period, recording sensor data of the spectrometer sensor, and clearing the spectrometer sensor to obtain the collected in the n+1th time period Background interference information.
  • the device further includes the substance detecting module, configured to perform preprocessing on the superimposed data, where the preprocessing comprises: denoising, base subtraction, and normalization processing, and according to the preprocessed
  • the superimposed data uses a Raman recognition algorithm to perform material identification on the object to be tested.
  • the present invention continuously collects lasers to collect Raman spectral information with smaller time granularity, and the two processes of laser emission collecting Raman spectral information and laser closing collecting background interference information can be alternately performed at high frequency, thereby avoiding ambient light.
  • the change or the change of the user's hand-held posture causes the noise difference between the Raman spectrum collection stage and the background interference collection stage to be too large, thereby improving the accuracy of the background subtraction operation, thereby improving the accuracy of the substance detection.
  • FIG. 5 is a block diagram of an electronic device 500, according to an exemplary embodiment.
  • the electronic device 500 can include a processor 501, a memory 502, a multimedia component 503, an input/output (I/O) interface 504, and a communication component 505.
  • a processor 501 can include a processor 501, a memory 502, a multimedia component 503, an input/output (I/O) interface 504, and a communication component 505.
  • I/O input/output
  • the processor 501 is configured to control the overall operation of the electronic device 500 to complete all or part of the steps in the Raman detection method described above.
  • the memory 502 is configured to store various types of data to support operations at the electronic device 500, such as may include instructions for any application or method operating on the electronic device 500, as well as application related data, For example, contact data, sent and received messages, pictures, audio, video, and so on.
  • the memory 502 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read only memory ( Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read Only Read-Only Memory (ROM), magnetic memory, flash memory, disk or optical disk.
  • the multimedia component 503 can include a screen and audio components.
  • the screen may be, for example, a touch screen, and the audio component is used to output and/or input an audio signal.
  • the audio component can include a microphone for receiving an external audio signal.
  • the received audio signal may be further stored in memory 502 or transmitted via communication component 505.
  • the audio component also includes at least one speaker for outputting an audio signal.
  • the I/O interface 504 provides an interface between the processor 501 and other interface modules, and the other interface modules may be a keyboard, a mouse, or a button. Wait. These buttons can be virtual buttons or physical buttons.
  • the communication component 505 is used for wired or wireless communication between the electronic device 500 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 505 can include: Wi-Fi module, Bluetooth module, NFC module.
  • the electronic device 500 may be configured by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), and digital signal processing devices (Digital).
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • Digital Digital
  • DSPD Signal Processing Device
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • controller microcontroller, microprocessor or other electronic components Implemented to perform the Raman detection method described above.
  • the embodiment of the present disclosure further provides a computer readable storage medium 1 including one or more programs for performing a Raman detection method, the method comprising:
  • the n takes a positive odd value from 1 until the collection of information is completed, wherein the n+1th time period is the next time period of the nth time period, and the nth time period is The duration of the (n+1)th time period is the same;
  • the n takes a positive odd value from 1 to 1 until the collection of information is completed, including:
  • n takes a positive odd value from 1 until n is equal to N, starting at the N+1th time period. After the laser is turned off at the moment and the background interference information is collected in the (N+1)th time period, the collection of the information is stopped;
  • T is the predetermined total duration of information collection
  • t is the duration of the predetermined nth time period
  • the n takes a positive odd value from 1 to 1 until the collection of information is completed, including:
  • the Raman spectral information collected by all the time periods in which the Raman spectral information is collected is superimposed, and it is determined whether the peak value in the superimposed data reaches a predetermined threshold;
  • the collection of information is stopped.
  • the method further includes:
  • the sensor data of the spectrometer sensor is recorded, and the spectrometer sensor is cleared to obtain the Raman spectrum information collected during the nth time period;
  • the sensor data of the spectrometer sensor is recorded, and the spectrometer sensor is cleared to obtain the background interference information collected in the (n+1)th time period.
  • the method further includes:
  • Pre-processing the superimposed data including: denoising, base subtraction, and normalization processing;
  • the present disclosure also provides an electronic device comprising the above computer readable storage medium 1 and one or more processors for executing the program in the computer readable storage medium 1.
  • the electronic device also includes a laser emitter, a spectrometer sensor, and the like.
  • the electronic device may be a terminal device such as a mobile phone or a tablet computer.
  • the present invention continuously collects lasers to collect Raman spectral information with smaller time granularity, and the two processes of laser emission collecting Raman spectral information and laser closing collecting background interference information can be alternately performed at high frequency, thereby avoiding ambient light.
  • the change or the change of the user's hand-held posture causes the noise difference between the Raman spectrum collection stage and the background interference collection stage to be too large, thereby improving the accuracy of the background subtraction operation, thereby improving the accuracy of the substance detection.

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  • Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

La présente invention concerne un procédé et un appareil de détection Raman, un support de stockage et un dispositif électronique, qui appartiennent au domaine technique de la détection de matériau. Le procédé consiste à : activer un laser au moment de début d'une nème période de temps pour irradier un objet à détecter et collecter des informations de spectre Raman dans la nème période de temps ; désactiver le laser au moment de début d'une (n+1)ème période de temps et collecter des informations d'interférence d'arrière-plan dans la (n+1)ème période de temps, n étant une valeur impaire positive commençant séquentiellement de 1 jusqu'à la fin jusqu'à ce que la collecte d'informations soit achevée, dans lequel la (n+1)ème période de temps est la période de temps suivante de la nème période de temps, et la durée de la nème période de temps est identique à celle de la (n+1)ème période de temps ; et déduire les informations d'interférence d'arrière-plan collectées dans la (n+1)ème période de temps des informations de spectre Raman collectées dans la nème période de temps afin d'obtenir des informations de sous-spectre Raman, et utiliser des données de superposition de l'ensemble des informations de sous-spectre Raman en tant que résultat de détection Raman.
PCT/CN2017/107687 2017-10-25 2017-10-25 Procédé et appareil de détection raman, support de stockage et dispositif électronique WO2019080013A1 (fr)

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PCT/CN2017/107687 WO2019080013A1 (fr) 2017-10-25 2017-10-25 Procédé et appareil de détection raman, support de stockage et dispositif électronique
CN201780002459.7A CN107980093A (zh) 2017-10-25 2017-10-25 拉曼检测方法、装置、存储介质及电子设备

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PCT/CN2017/107687 WO2019080013A1 (fr) 2017-10-25 2017-10-25 Procédé et appareil de détection raman, support de stockage et dispositif électronique

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EP4411349A1 (fr) * 2023-02-03 2024-08-07 Merck Patent GmbH Réduction du bruit de lumière parasite dans des capteurs à sonde raman optique

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