WO2018232752A1

WO2018232752A1 - Method, apparatus and device for detecting substance

Info

Publication number: WO2018232752A1
Application number: PCT/CN2017/089842
Authority: WO
Inventors: 黄晓庆; 骆磊
Original assignee: 深圳前海达闼云端智能科技有限公司
Priority date: 2017-06-23
Filing date: 2017-06-23
Publication date: 2018-12-27
Also published as: CN108369190B; CN108369190A

Abstract

A method, an apparatus and a device for detecting a substance, the method comprising: transmitting a first laser to a substance to be detected; receiving a second laser reflected from the substance to be detected and, after calculating the distance to the substance to be detected, performing focusing on the basis of the distance; receiving a third laser reflected from the substance to be detected after focusing, measuring the intensity of the third laser and, on the basis of the measured intensity of the third laser, adjusting the parameters of the transmitted laser in real time. The reflected laser is received by means of a receiving device, enabling automatic focusing by means of TOF, and automatic adjustment of the parameters of the laser on the basis of the reflected light intensity. Similarity comparisons are performed on the basis of continuous data collection, and when the laser pulse gap caused by heat absorption of an object automatically increases, it is possible to prevent non-tested objects also being mixed into the Raman spectroscopy data as a result of misoperations such as movement caused by time lengthening, or erroneous test measurement results caused by chemical changes due to high temperatures, thus significantly enhancing the user experience.

Description

Material detection method, device and device

Technical field

The embodiments of the present application relate to the field of electronic technologies, and in particular, to a method, device, and device for detecting substances.

Background technique

Raman spectrometer is mainly used in research institutes, physics and chemistry laboratories in universities, biology and medical fields, to study the determination and confirmation of material components. It can also be used in the criminal investigation and jewelry industry for drug testing and gemstones. Identification. The instrument is simple in structure, easy to operate, fast, efficient and accurate, and is known for its low wavenumber measurement capability. The confocal optical path is designed to achieve higher resolution, and um-level micro-area detection can be performed on the sample surface. Microscopic image measurement.

The laser emitting devices of current Raman spectrometer sensors are generally fixed (or manually adjusted), fixed-focus constant light, that is, when detecting a substance, the distance must be adjusted so that the substance is exactly at the focal length of the lens. In the process of implementing the embodiments of the present application, the inventors have found that the related art has at least the following problems: on the one hand, if a darker color object or a lower ignition point object is encountered, it is likely to be directly affected by the thermal effect of laser concentrating light. The substance is ignited and even causes a fire. On the other hand, if the child gets it, direct laser radiation can cause serious irreversible damage to the eye. The current Raman spectrometer sensors are mainly used by professionals in the professional field. This problem is not very obvious. However, in the next two years, with the sharp reduction of cost, the Raman spectrometer will enter the civilian market in large quantities, and the problem will become prominent. A big problem that hinders the development of the industry.

Summary of the invention

The embodiment of the present application provides a substance detecting method, device and device, which can adjust a pulse gap according to characteristics of a substance to be detected, and the user experience is good.

In order to solve the above technical problem, the first aspect, a technology adopted by the embodiment of the present application The solution is to provide a substance detection method for substance detection equipment, including:

Launching a first laser to the substance to be detected;

Receiving a second laser light reflected from the substance to be detected, calculating a distance from the substance to be detected, and performing focusing according to the distance;

Receiving, after receiving the focus, the third laser light reflected from the substance to be detected, measuring the intensity of the third laser, and adjusting the emitted laser parameters according to the measured intensity of the third laser, the parameters including : Laser intensity or laser pulse gap.

Wherein the distance between the calculation and the substance to be detected includes:

A time difference or a phase difference between the first laser light and the second laser light is calculated, and then the time difference or phase difference is converted into a distance.

The receiving, after receiving the third laser reflected from the substance to be detected after focusing, further includes:

It is judged according to the TOF whether the third laser light is a laser light reflected from the focus, and if so, the intensity of the third laser light is measured.

Wherein adjusting the parameters of the emitted laser light according to the intensity of the third laser light comprises:

When it is detected that the intensity of the third laser light is less than a preset threshold, the ratio of the emitted laser on-time and the off-time is reduced.

Wherein, after adjusting the emitted laser parameters according to the measured intensity of the third laser, the method further includes:

The receiver continues to receive the laser light reflected from the substance to be detected, and measures the intensity of the reflected laser light in real time, while the Raman optical path collects the real-time Raman spectrum, and the Raman spectrum of the received subsequent frame laser is compared with the previous frame. The Raman spectrum of the laser is compared. If the similarity of the Raman spectrum obtained by the two measurements is higher than a preset threshold, and the current integration time has reached the requirement, the name of the substance to be detected is determined according to the Raman spectrum. If the integration duration does not meet the requirements, continue to collect Raman spectra and adjust the laser parameters in real time. If the similarity is lower than the preset threshold, the user should be prompted to restart the detection.

Wherein, the first laser is a parallel laser of a pulse waveform or a single intensity parallel laser.

In a second aspect, a technical solution adopted by the embodiment of the present application is to provide a substance detecting apparatus, including:

a laser emitting module, configured to control the sensor to emit the first laser to the substance to be detected;

a focusing module, configured to calculate a distance from the to-be-detected substance according to the received second laser reflected from the substance to be detected, and then control the lens to perform focusing according to the distance;

An adjustment module, configured to measure an intensity of the third laser light according to the received third laser light reflected from the substance to be detected after focusing, and adjust the emitted laser parameter according to the measured intensity of the third laser light The parameters include: laser intensity or laser pulse gap.

Wherein, the focusing module is further configured to:

The adjustment module is further configured to:

Wherein, the adjustment module is further configured to:

When it is detected that the intensity of the third laser light is less than a preset threshold, the proportion of the emitted laser on-time and the off-time is reduced.

The adjustment module is further configured to:

In a third aspect, a technical solution adopted by the embodiment of the present application is to provide a substance detecting device, including:

At least one processor;

a lens

And a memory, a sensor, and a connection in communication with the at least one processor Receiver

Wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the method as described above; For emitting a first laser; the lens is for focusing the first laser emitted by the sensor; and the receiver is for receiving a second laser reflected from the substance to be detected.

In a fourth aspect, a technical solution adopted by the embodiments of the present application is to provide a non-transitory computer readable storage medium storing computer executable instructions when the computer executable instructions are When the substance detecting device is executed, the electronic device is caused to perform the method as described above.

Different from the prior art, the embodiment of the present application receives the reflected laser light through the laser receiver, can automatically adjust the time interval of the laser pulse through the TOF autofocus, and can increase the convenience of the user, and ensures the convenience of the user. Convergence of laser safety. On the other hand, because the similarity of continuous data acquisition is compared, when the laser pulse gap caused by the heat absorption of the object is automatically increased, the time can be prevented from being elongated, and the movement of the user's hand causes the non-subject object to be mixed into the Raman spectral data. In the middle, it also prevents misuse and has a significant improvement in the user experience.

DRAWINGS

1 is a schematic diagram of a distance measuring principle of a substance detector provided by the present application;

2 is a schematic diagram of a laser waveform emitted by a substance detector provided by the present application;

3 is a schematic diagram of an application scenario provided by the present application;

4 is a flow chart of a method for detecting a substance provided by an embodiment of the present application;

FIG. 5 is a structural block diagram of a substance detecting apparatus according to an embodiment of the present application; FIG.

FIG. 6 is a schematic structural view of a substance detecting device provided by the present application.

Detailed ways

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments of the present application described herein are only used to explain the present application and are not intended to limit the application.

Referring to FIG. 1, the embodiment of the present application performs ranging by a sensor of a substance detecting device. The The substance detecting device includes: a sensor, a receiver, and a lens. The sensor itself emits a laser that emits laser light from the lens of the lens. However, in order to be able to measure distance and autofocus, a receiver is provided beside the lens (or inside the lens) to determine the distance by TOF (Time of Flight) or other methods.

The receiver here must be able to get both time information and light intensity information. The ranging is the prior art, and the linear distance of the OA in FIG. 1 can be obtained by the TOF. The light intensity information can be directly obtained from the photoelectric signal of the receiver, and the gap and/or power of the laser pulse can be adjusted according to the intensity of the reflected light.

Referring to FIG. 2, the laser light emitted by the sensor of the substance detecting device of the embodiment of the present application is in the form of a pulse wave instead of a constant laser. The sensor is in operation during the t0 period and the emitted laser has high energy. While in the t1 period, the sensor is off. By analogy, when the subsequent waveform is the same as the waveform of the t0 period, the sensor is in the working state, and when the waveform is the same as the waveform of the t1 period, the sensor is in the off state. When the t1 period is zero, then the waveform emitted by the laser at this time is a single intensity constant light.

FIG. 3 is a schematic application scenario of a method for detecting a substance according to an embodiment of the present application. In some possible application scenarios, as shown in FIG. 3, the application scenario includes a Raman detector 1 and a substance to be detected 2. The Raman detector 1 emits a parallel laser to the substance 2 to be detected. When the substance detector is turned on, the default setting of the lens is to emit parallel light without focusing. The lens is directed against the substance to be detected, and after receiving the start detection signal triggered on the user interface, a parallel laser is emitted, and the parallel laser light is a laser beam in the form of a pulse wave as shown in FIG. 2. Next, the Raman detector 1 receives the laser light reflected from the substance 2 to be detected, calculates the distance from the substance 2 to be detected, and performs focusing. When focusing, the distance between the lens of the Raman detector 1 and the substance to be detected 2 should be kept within a certain range. If it is beyond the autofocus range, it will not be detected correctly. The Raman detector 1 receives the laser light reflected from the substance to be detected 2 after focusing, measures the intensity of the laser light, and adjusts the intensity of the emitted laser light according to the laser intensity. This adjustment is a real-time dynamic adjustment. If the focus intensity received by the Raman detector 1 is less than the preset threshold during the t0 period, the emitted laser light will be turned off and the user will be prompted to prevent the object from being ignited or causing potential safety hazards. When the Raman detector 1 receives the laser light reflected from the substance 2 to be detected, it can also collect the scattered light, that is, the Raman spectrum, in real time. The substance name corresponding to the Raman spectrum is determined according to the matching algorithm and notified to the user.

In the prior art, the intensity of the laser emitted by the Raman detector 1 cannot be based on the substance to be detected. Automatic adjustment, which is easy to cause: 1, if you encounter a darker color object or a lower ignition point, due to the thermal effect of laser concentrating, it is likely to directly ignite the test substance, and even cause a fire. 2. If the child gets it, direct laser radiation can cause serious irreversible damage to the eyes.

Referring to FIG. 3 again, in a possible application scenario provided by the embodiment of the present application, the Raman detector 1 receives the reflected laser light, can automatically focus, and can automatically adjust the time interval of the laser pulse by the reflected light intensity, thereby increasing user use. The convenience also ensures the safety of the concentrated laser. On the other hand, because the similarity of continuous data acquisition is compared, when the laser pulse gap caused by the heat absorption of the object is automatically increased, the movement of the user's hand due to the lengthening of the time is prevented, and the non-subject object is also mixed into Raman. In the spectral data, it also prevents misoperations and significantly improves the user experience.

Referring to FIG. 4, in one embodiment, a substance detecting method is performed when a substance detecting device is used for detecting a substance, and the main body of the method is a substance detecting device, and the method includes:

Step 41: The first laser is emitted to the substance to be detected.

After the substance detection device is turned on, the default setting of the lens is to emit parallel light without focusing. The specific steps include: the lens is opposite to the substance to be detected, and after receiving the start detection signal triggered on the user interface, a parallel first laser is emitted. The parallel laser emitted is a laser in the form of a pulse wave as shown in Fig. 2. The initial condition t1 is preset to 0, or t0 and t1 are preset fixed data after the test. For example, after receiving a button for starting detection on the user interface, detection is started, and a laser having a pulse gap of t0 is emitted.

Step 42: Receive a second laser light reflected from the substance to be detected, calculate a distance from the substance to be detected, and perform focusing according to the distance.

When the substance to be tested is detected, the lens of the substance detecting device needs to be in focus. When focusing, the distance should not be too far, and should be within a certain range, for example, 1-10cm. Since the focusing distance is limited, the distance between the lens of the substance detecting device and the substance to be detected should be kept within a certain range, and the automatic focusing range will not be detected correctly. If the substance to be detected is a liquid, autofocus cannot be performed according to the detected distance at this time. Even if the image is based on focusing, since there is no significant difference in contrast, autofocus is difficult to succeed, so when detecting the liquid, A prompt is issued prompting the user to manually adjust the focus and lock it.

The receiver receives the reflected laser in real time and calculates the distance between the object to be measured and the lens according to the TOF. Specifically, the sensor in the lens calculates the time difference or phase difference between laser emission and reflection, and then converts it into a distance. If the calculated distance is within the focus range, the AF AF module of the lens is automatically adjusted in real time according to the calculated distance so that the laser can accurately focus on the substance to be detected. If the calculated distance exceeds the auto focus range, the user may be prompted to place the object to be tested in a fixed distance interval to restart the measurement, and step 42 is repeated. If the reflected laser is not received, the lens may be facing a farther place. For example, facing the sky, the user should be prompted to place the object to be tested within a fixed distance interval to restart the measurement. Repeat step 41.

Step 43: Receive a third laser light reflected from the substance to be detected after focusing, measure the intensity of the third laser, and adjust the emitted laser parameter according to the measured intensity of the third laser. The parameters include: laser intensity or laser pulse gap.

After the lens is in focus, the receiver measures the reflected laser intensity at the focus position. If the substance to be detected is white, it is strongly reflected. If it is black, it is weakly reflected. The reflection intensity of other color substances is between white matter and black matter. By calibrating the optical path TOF of the emitted laser, the photons of each laser are reflected from the emission to the focus, and the TOF is necessarily a certain value. If the photons from the non-focus are different, the TOF must be different, so it can be judged according to the TOF of the received photons. Whether it is a laser reflected from the focus, and then measuring the intensity of the reflected laser. Optionally, the TOF may take a range of values to tolerate a certain focus error.

After the measurement, the proportion of t0 and t1 in the pulse waveform shown in FIG. 2 is adjusted in real time according to the obtained light intensity information, so as to prevent the dark-colored substance to be detected from endothermic combustion or chemical reaction at a high temperature.

When making adjustments, assuming that the emission intensity of the laser is x lumens and the laser intensity obtained by the receiver is y lumens, the ratio may be calculated as follows:

T0/(t0+t1)=n*y/x;

Suppose t0+t1 is a fixed set value, where n is a linear scale factor.

What kind of optimal correspondence is actually used depends on the specific equipment and is not limited here. This calculation is a real-time dynamic adjustment. If the focus intensity received by the receiver is less than the preset threshold during the t0 period, the emitted laser light will be turned off and the user will be prompted to prevent the object from being ignited or causing potential safety hazards. The received focus intensity is less than the preset threshold, including but not limited to: focusing on an object with a very dark color, or a suspended state, or the object is not In the focus point.

Due to the change of the laser pulse time slot and the principle that the optical signal-to-noise ratio is proportional to the square of the integration time, the time of material detection is also extended accordingly. At this time, according to the proportion of t0 and t1 in the laser pulse, the remaining time of the user is prompted. . The normal detection is less than 1 s, and it may take 3-5 s after the pulse change.

When the laser intensity is adjusted, the power of the emitted laser light is adjusted accordingly. The power of the emitted laser light is turned up or down.

After adjusting the emitted laser parameters according to the measured intensity of the third laser, the receiver continues to receive the laser light reflected from the substance to be detected, performs real-time measurement on the intensity of the reflected laser, and adjusts the emitted laser parameters in real time. At the same time, the scattered light is collected in real time, that is, the Raman spectrum (by the standard Raman detection method, the laser reflection path of the material reflection and scattering is returned, and the Raman spectrum is extracted through the dichroic film and the filter group and integrated. The final Raman line). The measured Raman spectrum of the latter frame can be compared with the Raman spectrum of the previous frame. If the similarity of the Raman spectrum obtained by the two measurements is lower than the preset threshold, it can be determined that the focus has occurred during the measurement. The change or the substance itself changes, and the user may be prompted to change the substance to be detected, and the user decides whether to restart the test. For example, at 0.5 s, the gray powder on the table is focused and the light intensity is measured, because the laser is emitted to the table at 0.6 s, or the object is chemically reacted during the laser irradiation due to excessive temperature. A new substance has been generated. If the similarity is higher than the set threshold, and the current detected integration time has reached the requirement, and enough information is collected, the test is ended, the laser is turned off, and the substance name corresponding to the Raman spectrum is determined according to the matching algorithm and notified. user.

Optionally, if the detected integration duration is insufficient, the information has not been collected enough, and the current is a fixed focal length, repeating step 43 during the t0 period, if the current is autofocus, repeating

steps

42, 43 during the t0 period, continuing the information collect. When manually setting the focal length or auto focus, if it enters the t1 period, it waits for the next t0 time point.

The embodiment of the present application receives the reflected laser light through the laser receiver, can automatically adjust the time interval of the laser pulse by the TOF autofocus, and increases the convenience of the user, and ensures the safety of the concentrated laser. . On the other hand, because the similarity of continuous data acquisition is compared, when the laser pulse gap caused by the heat absorption of the object is automatically increased, the dark object to be measured under constant laser irradiation can be prevented from absorbing heat or being emitted at a high temperature. The chemical reaction is changed to pulse to prevent heat accumulation. The movement of the user's hand causes the non-measurement object to be mixed into the Raman spectral data, which prevents misoperation and improves the user experience.

Referring to FIG. 5, in another embodiment, a substance detecting device for performing substance detection, the device includes: a laser emitting module 51, a focusing module 52, and an adjusting module 53. The laser emitting module 51 controls the sensor to emit the first laser. The focus module 52 calculates the distance from the second laser that is reflected from the substance to be detected, and then controls the lens to focus, and then the adjustment module 53 reflects from the substance to be detected according to the received focus. The third laser light measures the intensity of the third laser light, and adjusts the intensity of the emitted laser light according to the laser intensity.

specific:

The laser emitting module 51 is configured to control the sensor to emit the first laser to the substance to be detected.

After the substance detection device is turned on, the default setting of the optical lens is to emit parallel light without focusing. The specific steps include: after the lens is facing the substance to be detected, and receiving the start detection signal triggered on the user interface, the laser emitting module 51 controls the sensor to emit the parallel laser to the substance to be detected. The parallel laser emitted is a laser in the form of a pulse wave as shown in Fig. 2. The initial condition t1 is preset to 0, or t0 and t1 are preset fixed data after the test. For example, after receiving a button for starting detection on the user interface, detection is started, and a laser having a pulse gap of t0 is emitted.

The focusing module 52 is configured to calculate a distance from the to-be-detected substance according to the received second laser reflected from the substance to be detected, and then control the lens to perform focusing according to the distance.

When the substance detecting device detects the substance to be detected, the lens of the substance detecting device needs to be in focus. When the lens is in focus, the distance should not be too far, and should be within a certain range, for example, 1-10cm. Since the focusing distance is limited, the distance between the lens of the substance detecting device and the substance to be detected should be kept within a certain range, and the automatic focusing range will not be detected correctly. If the substance to be detected is a liquid, autofocus cannot be performed according to the detected distance at this time. Even if the image is based on focusing, since there is no significant difference in contrast, autofocus is difficult to succeed, so when detecting the liquid, A prompt is issued prompting the user to manually adjust the focus and lock it.

The focusing module 52 receives the reflected laser light in real time from the receiver, and calculates the distance between the object to be measured and the lens according to the TOF. Specifically, the sensor in the lens calculates the time difference or phase difference between laser emission and reflection, and then converts it into a distance. If the calculated distance is in the focus range Inside, the AF focus module of the lens is automatically adjusted in real time according to the calculated distance so that the laser can accurately focus on the substance to be detected. If the calculated distance exceeds the auto focus range, the user may be prompted to place the object to be tested within a fixed distance interval to restart the measurement. If the reflected laser is not received, the lens may be facing a distant place. For example, facing the sky, the user should be prompted to place the object to be tested within a fixed distance interval to start measuring again.

The adjusting module 53 is configured to measure the intensity of the third laser according to the received third laser reflected from the substance to be detected after focusing, and perform real-time transmission on the intensity of the third laser according to the measured The laser parameters are adjusted, including: laser intensity or laser pulse gap.

After the lens is in focus, the receiver measures the reflected laser intensity at the focus position. If the substance to be detected is white, it is strongly reflected. If it is black, it is weakly reflected. The reflection intensity of other color substances is between white matter and black matter. The adjustment module 53 is calibrated by the optical path TOF of the emitted laser, and the photons of each laser are re-reflected from the emission to the focus, and the TOF thereof is necessarily a determined value. If the photons from the non-focus are different, the TOF is necessarily different, and thus can be based on receiving the reflected photons. The TOF judges whether it is a reflected laser beam, and then measures the light intensity of the reflected laser light. Optionally, the TOF may take a range of values to tolerate a certain focus error.

After the measurement module 53 performs the measurement and adjusts the proportion of t0 and t1 in the pulse waveform as shown in FIG. 2 in real time according to the obtained light intensity information, the dark substance to be detected is absorbed by the endothermic combustion or chemical reaction occurs at a high temperature.

T0/(t0+t1)=n*y/x; (assuming t0+t1 is a fixed set value)

Where n is the linear scale factor.

What kind of correspondence is actually used is the best need according to the specific equipment through experiments, not limited here. This calculation is a real-time dynamic adjustment. If the focus intensity received by the receiver is less than the preset threshold during the t0 period, the emitted laser will be turned off and the user will be prompted to prevent the object from being ignited or causing potential safety hazards. The case where the received focus light intensity is less than the preset threshold includes, but is not limited to, focusing on an object with a very dark color, or a suspended state, or the object is not in the focus point.

Due to the change of the laser pulse time slot and the principle that the optical signal-to-noise ratio is proportional to the square of the integration time, the time of material detection will be extended accordingly. At this time, according to the proportion of t0 and t1 in the laser pulse, the remaining user is prompted. duration. The normal detection is less than 1 s, and it may take 3-5 s after the pulse change.

The adjustment module 53 adjusts the emitted laser parameters according to the measured intensity of the third laser, and continues to receive the laser light reflected from the substance to be detected, and when the intensity of the reflected laser light is measured in real time, the real-time pull of the reflected laser light can be measured. Mann spectrum. At this time, it is no longer the receiver receiving, but the standard Raman detection method, the material reflection and scattering laser is extended by the laser emission path, the Raman spectrum is extracted through the dichroic color filter and the filter group, and the final is obtained. Raman line. The Raman spectrum of the measured laser of the latter frame can be compared with the Raman spectrum of the previous frame laser. If the similarity of the Raman spectrum obtained by the two measurements is lower than a preset threshold, it can be determined during the measurement. The focus has changed or the substance itself has changed. At this point, the user can be prompted to change the substance to be detected, and the user decides whether to restart the test. For example, at 0.5 s, the gray powder on the table is focused and the light intensity is measured, because the laser is emitted to the table at 0.6 s, or the object is chemically reacted during the laser irradiation due to excessive temperature. A new substance has been generated. If the similarity is higher than the set threshold, and the current detected integration time has reached the requirement, and enough information is collected, the test is ended, the laser is turned off, and the substance name corresponding to the Raman spectrum is determined according to the matching algorithm and notified. user.

Optionally, if the detected integration time is not enough, the information has not been collected enough, and the current is a fixed focal length, and the parameters of the emitted laser are adjusted by the adjustment module 53 during the t0 period, if the current is autofocus, at the t0 period The focus is repeatedly performed by the focusing module 52, and the parameters of the emitted laser light are adjusted by the adjustment module 53 to continue the collection of information. When manually setting the focal length or auto focus, if it enters the t1 period, it waits for the next t0 time point.

The embodiment of the present application receives the reflected laser light through the laser receiver, can automatically adjust the time interval of the laser pulse by the TOF autofocus, and increases the convenience of the user, and ensures the safety of the concentrated laser. . On the other hand, based on consecutive numbers According to the similarity degree of the collected, when the laser pulse gap caused by the heat absorption of the object is automatically increased, the erroneous operation such as the movement of the user's hand during the detection process can be prevented, and the non-subject object is also mixed into the Raman spectrum. In the data, or the error of the test result caused by the chemical change of the object to be tested due to high temperature, the user experience is obviously improved.

Referring to FIG. 6, a hardware structure diagram of a substance detecting device 60 according to another embodiment is provided. As shown in FIG. 6, the substance detecting device 60 includes:

One or more processors 61, a memory 62, a sensor 63, a lens 64, and a receiver 65 are exemplified by a processor 61 in FIG.

The processor 61, the memory 62, the sensor 63, and the receiver 65 may be connected by a bus or other means, as exemplified by a bus connection in FIG.

The memory 62 is a non-volatile computer readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs, and modules. The processor 61 executes various functional applications and data processing by executing non-volatile software programs, instructions, and modules stored in the memory 62, that is, implementing the above-described substance detecting method.

The memory 62 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to usage of the substance detecting device, and the like. Moreover, memory 62 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

The one or more modules are stored in the memory 62 and, when executed by the one or more processors 61, perform the substance detection method described above.

The sensor 63 is used to emit a parallel laser. The lens 64 is used to focus the parallel laser light emitted by the sensor. The receiver 65 is for receiving laser light reflected from the substance to be detected.

The above products can perform the methods provided by the embodiments of the present application, and have the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiments of the present application.

The embodiment of the present application provides a non-transitory computer readable storage medium storing computer-executable instructions that are executed by one or more processors, such as in FIG. One processor 61 that can make one or more of the above The processor can perform the substance detection method in the above method.

The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Through the description of the above embodiments, those skilled in the art can clearly understand that the various embodiments can be implemented by means of software plus a general hardware platform, and of course, by hardware. A person skilled in the art can understand that all or part of the process of implementing the above embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above description is only the embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation of the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of this application.

Claims

A substance detecting method is applied to a substance detecting device, which comprises:

Launching a first laser to the substance to be detected;

Receiving a second laser light reflected from the substance to be detected, calculating a distance from the substance to be detected, and performing focusing according to the distance;

Receiving a third laser light reflected from the substance to be detected after focusing, measuring the intensity of the third laser, and adjusting the emitted laser parameter in real time according to the measured intensity of the third laser, the parameter Includes laser intensity or laser pulse gap.
The method according to claim 1, wherein the calculating the distance from the substance to be detected comprises:

A time difference or a phase difference between the first laser light and the second laser light is calculated, and then the time difference or phase difference is converted into a distance.
The method according to claim 1 or 2, wherein after receiving the third laser light reflected from the substance to be detected after focusing, the method further comprises:

It is judged according to the TOF whether the third laser light is a laser light reflected from the focus, and if so, the intensity of the third laser light is measured.
The method according to claim 3, wherein the adjusting the emitted laser parameters according to the intensity of the third laser comprises:

When it is detected that the intensity of the third laser light is less than a preset threshold, the ratio of the emitted laser on-time and the off-time is reduced.
The method according to claim 4, wherein the adjusting the emitted laser parameters according to the measured intensity of the third laser further comprises:

The receiver continues to receive the laser light reflected from the substance to be detected, and measures the intensity of the reflected laser light in real time, and simultaneously collects the scattered light when the emitted laser light is irradiated onto the object to be tested, that is, pulls, through the Raman optical path. The spectroscopy compares the Raman spectrum of the received laser beam with the Raman spectrum of the previous frame laser. For example, the similarity of the Raman spectrum obtained by the two measurements is higher than a preset threshold, and the current integration time has been When the requirement is met, the name of the substance to be detected is determined according to the Raman spectrum; if the integration time does not meet the requirement, then The Raman spectrum is continuously collected and the laser parameters are adjusted in real time; if the similarity is lower than the preset threshold, the user is prompted to restart the detection.
Method according to claim 1 or 2, characterized in that

The laser is a laser with a pulse waveform parallel or a parallel laser with a single intensity.
A substance detecting device, comprising:

a laser emitting module, configured to control the sensor to emit the first laser to the substance to be detected;

a focusing module, configured to calculate a distance from the to-be-detected substance according to the received second laser reflected from the substance to be detected, and then control the lens to perform focusing according to the distance;

An adjustment module, configured to measure an intensity of the third laser light according to the received third laser light reflected from the substance to be detected after focusing, and adjust the emitted laser parameter according to the measured intensity of the third laser light The parameters include: laser intensity or laser pulse gap.
The apparatus according to claim 7, wherein said focusing module is further configured to:

A time difference or a phase difference between the first laser light and the second laser light is calculated, and then the time difference or phase difference is converted into a distance.
The device according to claim 7 or 8, wherein the adjustment module is further configured to:

It is judged according to the TOF whether the third laser light is a laser light reflected from the focus, and if so, the intensity of the third laser light is measured.
The device according to claim 9, wherein the adjustment module is further configured to:

When it is detected that the intensity of the third laser light is less than a preset threshold, the proportion of the emitted laser on-time and the off-time is reduced.
The device according to claim 10, wherein the adjustment module is further configured to:

The control receiver continues to receive the laser light reflected from the substance to be detected, and measures the intensity of the reflected laser light in real time, and collects the real-time Raman spectrum, and receives the Raman spectrum of the laser beam of the subsequent frame and the laser of the previous frame. Raman spectroscopy for comparison, such as two measurements If the similarity of the spectroscopy is higher than the preset threshold, and the current integration time has reached the requirement, the name of the substance to be detected is determined according to the Raman spectroscopy; if the integration time does not meet the requirement, the Raman spectroscopy is continuously collected, and The laser parameters are adjusted in real time; if the similarity is lower than the preset threshold, the user should be prompted to restart the detection.
The apparatus according to claim 7 or 8, wherein the laser light is a laser beam having a pulse waveform parallel or a parallel laser light having a single intensity.
A substance detecting device, comprising:

At least one processor;

a lens

And a memory, a sensor, and a receiver communicatively coupled to the at least one processor;

Wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform any of claims 1-6 The method is for emitting a first laser; the lens is for focusing the first laser emitted by the sensor; and the receiver is for receiving the second laser and the third laser reflected from the substance to be detected .
A non-transitory computer readable storage medium storing computer executable instructions for causing the electronic device to perform claim 1 when the computer executable instructions are executed by a substance detecting device The method described in 6.