CN108780036B - Optical detection equipment and detection method - Google Patents
Optical detection equipment and detection method Download PDFInfo
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- CN108780036B CN108780036B CN201880001109.3A CN201880001109A CN108780036B CN 108780036 B CN108780036 B CN 108780036B CN 201880001109 A CN201880001109 A CN 201880001109A CN 108780036 B CN108780036 B CN 108780036B
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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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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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
- G01N21/62—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
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Abstract
The application relates to the technical field of optical detection, in particular to detection equipment and a detection method. The optical detection device includes: the device comprises a device main body, a detection probe and a pressure sensor, wherein the pressure sensor is arranged on the detection probe, the detection probe is aligned with a light inlet and a light outlet of the device main body, and the pressure sensor is in communication connection with the device main body; the pressure sensor is used for detecting the pressure value born by the detection probe and transmitting the pressure value to the equipment main body; the equipment main body is used for acquiring the pressure value transmitted by the pressure sensor, judging whether the object to be detected is placed according to the pressure value, and starting a detection process after the object to be detected is placed. The optical detection device can solve the problem that the substance to be detected cannot be placed in the process of detecting the substance by using the optical detection device.
Description
Technical Field
The present disclosure relates to optical inspection technologies, and particularly to an optical inspection apparatus and an optical inspection method.
Background
At present, professional optical substance detection equipment is mostly used for contact detection, such as a raman spectrometer and the like, and since the focal point of a lens on the optical detection equipment is fixed, and laser has a fixed focal length, the detection can be carried out only by placing a substance at the focal position. However, the detection result of the substance is greatly affected because the user cannot hold the hand with his or her own hand unstably or cannot control the focus. Therefore, many current detection devices adopt a structure of a protruding probe, so that the optical focus is just positioned at the most front end of the protruding probe, that is, when the substance to be detected is pressed against the probe, the substance is just positioned at the focus position.
The inventor finds in the process of studying the prior art that the protruding structure on the existing optical detection device can enable the substance to be exactly located at the optical focal position, however, an untrained user or a first-time tester still cannot accurately place the substance at the focal position in many times, and in addition, when the substance is not located at the focal position, the emission of the detection laser is selected first, and then the substance is moved to the focal position, or the substance is moved away before the detection is finished, and the like, which may cause the reduction of the detection signal-to-noise ratio and even the detection error.
Therefore, it is necessary to avoid the above-described situation in which the substance cannot be accurately placed and to detect the occurrence of an abnormal condition.
Disclosure of Invention
The technical problem to be solved by some embodiments of the present application is to provide an optical detection apparatus and a detection method, so as to solve the problem that a substance to be detected cannot be accurately placed in a process of detecting the substance by using the optical detection apparatus.
One embodiment of the present application provides an optical inspection apparatus, including: the device comprises a device main body, a detection probe and a pressure sensor, wherein the pressure sensor is arranged on the detection probe, the detection probe is aligned with a light inlet and a light outlet of the device main body, and the pressure sensor is in communication connection with the device main body; the pressure sensor is used for detecting the pressure value born by the detection probe and transmitting the pressure value to the equipment main body; the equipment main body is used for acquiring the pressure value transmitted by the pressure sensor, judging whether the object to be detected is placed according to the pressure value, and starting a detection process after the object to be detected is placed.
An embodiment of the present application further provides a detection method, which is applied to the optical detection apparatus in the above embodiment, and includes: the pressure sensor transmits the detected pressure value borne by the detection probe to the equipment main body; the equipment main body judges whether an object to be detected is placed or not according to the pressure value; and starting a detection process after the main body of the equipment determines that the object to be detected is placed.
Compared with the prior art, set up pressure sensor on test probe in this application part embodiment, make equipment main part know in real time whether to detect the detection probe and have the thing that waits that places through the pressure value of pressure sensor transmission, and begin to detect after confirming that there is the thing that waits that places, avoided placing because of artificial factor and wait that the phenomenon that detects the inaccurate influence testing result in thing position takes place, in addition, through setting up pressure sensor, equipment main part can judge the situation that waits to detect the thing and place according to the pressure value, do not need the user to place according to the experience of using and wait to detect the thing, therefore, even the user that has not passed the training or the people of first time use also can be quick simple this optical detection equipment of use, user's operation experience has been improved.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
FIG. 1 is a schematic structural diagram of an optical inspection apparatus according to a first embodiment of the present application;
FIG. 2 is a schematic structural diagram of an optical inspection apparatus according to a second embodiment of the present application;
FIG. 3 is a flow chart of a detection method in a third embodiment of the present application;
fig. 4 is a flowchart of a detection method in a fourth embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, some embodiments of the present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. However, it will be appreciated by those of ordinary skill in the art that in the various embodiments of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present application relates to an optical inspection apparatus including: the device comprises a device body 10, a detection probe 20 and a pressure sensor 30, wherein as shown in fig. 1, the pressure sensor 30 is arranged on the detection probe 20, the detection probe 20 is aligned with a light inlet and a light outlet (not shown in the figure) of the device body 10, and the pressure sensor 30 is in communication connection with the device body 10;
a pressure sensor 30 for detecting a pressure value applied to the detection probe 20 and transmitting the pressure value to the apparatus main body 10; the device body 10 is configured to obtain a pressure value transmitted by the pressure sensor 30, determine whether an object to be detected is placed according to the pressure value, and start a detection process after determining that the object to be detected is placed.
Specifically, a convex part is arranged at the position of the detection probe 20 for contacting with the object to be detected; the pressure sensor 30 is used for detecting the pressure value received by the boss. It should be noted that, when starting the optical detection device and detecting the object to be detected, need to wait to detect the object and place the focus position at test probe in advance, just can make the object to be detected that optical detection device can be accurate detect, it is more accurate to make the collection acquire wait to detect the object spectrum, the testing result is more reliable, that is to say, pressure sensor is used for detecting the pressure value that the bellying bore, make the equipment main part can guarantee to detect the object to be detected and place in the focus position according to the pressure value of pressure sensor transmission when detecting, the intelligence of check out test set has been promoted.
It should be noted that, in this embodiment, only the contact type optical detection device in which the top end of the detection probe is the focal position is taken as an example for description, for the non-contact type optical detection device, the pressure sensor may be disposed on another component at the focal position, as long as the pressure sensor can sense the pressure change when the object to be detected is placed.
In one specific implementation, the pressure sensor disposed on the protruding portion is an annular pressure sensor, and a conversion circuit is disposed on the detection probe 20, and the conversion circuit is electrically connected to the pressure sensor 30 and is in communication connection with the apparatus main body 10; the conversion circuit converts the signal output from the pressure sensor 30 into a voltage value and transmits the voltage value to the apparatus body 10.
It should be noted that, because the structure of the annular pressure sensor can be well attached to the boss, and the pressure distribution of the annular portion of the boss can be accurately detected, according to the structural characteristics of the annular pressure sensor, a conversion circuit matched with the annular pressure sensor needs to be arranged on the detection probe, so that the equipment main body can know the pressure distribution of the annular portion on the detection probe according to the pressure value transmitted by the annular pressure sensor, and further know whether the object to be detected is placed at the focal position.
It should be noted that other types of pressure sensors, such as semiconductor pressure sensors, may be disposed on the protruding portion of the detection probe, and different conversion circuits need to be designed for disposing different pressure sensors.
Specifically, in the detection process, the process of determining that the object to be detected is placed in the apparatus main body 10 is as follows: and judging whether the pressure value is greater than or equal to a preset threshold value, and if so, determining that the object to be detected is placed.
It should be noted that, the value of the preset threshold that needs to be set for actual detection may be updated, and the preset threshold corresponding to different objects to be detected with different qualities may also be different, for example, when an object to be detected with a lighter quality is detected, the preset threshold may be set to 2, the pressure sensor detects that the pressure value of the protruding portion is greater than 2, and the device main body may determine that the object to be detected is placed on the detection probe according to the pressure value that is not 2; the heavier thing of waiting to detect of detection quality, such as metal can be set as 5 with predetermineeing the threshold value, and pressure sensor detects the pressure value that the bellying is greater than 5, and the equipment main part can be based on the pressure value and confirm that to detect to have to place on the detection probe and wait to detect the thing. The value of the preset threshold is only for illustration and is not limited specifically.
Specifically, after the detection is started, whether the detection is finished or not can be determined through a preset signal-to-noise ratio or detection duration, if the detection is started, the spectral data of the object to be detected are obtained, the signal-to-noise ratio is calculated, and when the signal-to-noise ratio obtained through calculation is smaller than or equal to the preset signal-to-noise ratio, the detection process is finished; or recording the detection time after the detection is started, and when the detection time is greater than or equal to the preset detection time, indicating that the detection process is finished. Determining completion of the detection process is not limited to the above-mentioned manner, and is merely illustrative.
It is worth mentioning that, after the detection begins, when the detection has not been completed yet, if pressure sensor detects that the pressure value that test probe bore reduces, for avoiding influencing the testing result, the equipment main part is used for: when the obtained pressure value is determined to be changed from being larger than or equal to a preset threshold value to being smaller than the preset threshold value, the obtained spectrum data or the recorded detection duration is stored, and a prompt that the detection is not finished is sent; and if the obtained pressure value is determined to be larger than or equal to the preset threshold value within the preset time, extracting the obtained spectral data and continuing to detect.
In a specific implementation, if the detection process is to collect the spectral data of the object to be detected for multiple times, when the detection is interrupted, the currently acquired spectral data is stored, and after the subsequent determination of continuing the detection, the last collected spectral data can be optionally discarded if necessary, and the spectral data of the object to be detected is continuously collected until the number of times of collecting the substance spectrum is determined to meet the number of times of detecting the substance spectrum, the detection is completed.
It should be noted that the last collected spectral data is incomplete due to the interruption of detection, and in order to ensure the accuracy of the detection result, the last collected spectral data is discarded, and the number of times of collecting the spectrum is increased once after the detection is continued, so as to ensure that the complete spectral data of the object to be detected can be obtained.
It is worth mentioning that the spectral data comprises at least one of a substance spectrum and a reflectance spectrum.
In another specific implementation, whether detection is finished or not is determined according to the detection duration, if the detection interruption occurs, the detection timing is also suspended, and the timing is continued after the subsequent detection is resumed until the detection duration reaches the preset detection duration, and the detection is determined to be finished.
It should be noted that the specific criterion for determining the end of detection is not limited to the above-mentioned detection duration or the preset signal-to-noise ratio, and if the detection is interrupted due to the position change of the object to be detected during the detection process, the criterion for determining the end of detection after the detection is resumed depends on the specific substance spectral data collection strategy, which is not limited herein.
Compared with the prior art, set up pressure sensor on test probe, make equipment main part know in real time whether there is the thing that waits to detect who places on the test probe through the pressure value of pressure sensor transmission, and begin to detect after confirming that there is the thing that waits to detect who places, avoided placing the phenomenon that waits to detect the inaccurate influence testing result in thing position because of artificial factor and taken place, in addition, through setting up pressure sensor, make equipment main part can judge the situation of waiting to detect that thing placed according to the pressure value, do not need the user to remove to place according to the experience of using and wait to detect the thing, therefore, even the user that does not have the training or the people of first time use also can be quick simple this optical detection equipment of use, user's operation experience has been improved.
A second embodiment of the present application relates to an optical detection apparatus, and is substantially the same as the first embodiment, mainly different in that the arrangement position of the pressure sensor is changed in the second embodiment, and the structure thereof is as shown in fig. 2.
The pressure sensor 30 is disposed at the connection between the inspection probe 20 and the apparatus body 10, and the pressure sensor 30 can be used to detect the total pressure value received by the entire inspection probe 20. It should be noted that, since the pressure sensor 30 is provided at the connection between the detection probe 20 and the apparatus main body 10, the pressure value at a certain point of the detection probe 20 cannot be specifically determined, but the pressure sensor 30 can determine whether or not the object to be detected is in contact with the detection probe based on the pressure value.
Since the top end of the protruding portion of the detection probe 20 is the focal position of the lens, and the object to be detected is placed at the front end of the protruding portion, the apparatus main body 10 can determine whether the object to be detected is placed at the focal position according to the pressure value detected by the pressure sensor 30.
It should be noted that the pressure sensor may be disposed at other positions of the detection probe, as long as the pressure value borne by the detection probe can be acquired, and the specific position where the pressure sensor is disposed is not limited herein.
It is worth mentioning that if a pressure sensor is arranged at the joint of the detection probe and the equipment main body, for example, a single pressure sensor, since the pressure sensor can directly feed back the obtained pressure value to the equipment main body, a conversion circuit is not required to be designed, and the detection probe can be a simple metal piece or a plastic piece, and has a simple structure.
Compared with the prior art, the pressure sensor is arranged at the joint of the detection probe and the equipment main body, so that an additional circuit does not need to be designed on the detection probe, the structure of the detection probe is simplified, and the cost is reduced.
In the above embodiments, the object to be detected is placed, which means that the object to be detected is placed at the focal position. The contact type optical detection device is characterized in that an object to be detected is placed at the focus position of the front end of the detection probe, if the pressure sensor is arranged at the front end of the detection probe, the object to be detected is in direct contact with the pressure sensor, and otherwise, the object to be detected is in direct contact with the front end of the detection probe.
A third embodiment of the present application relates to a detection method, which is applied to the optical detection apparatus according to the first or second embodiment, and a specific implementation flow is shown in fig. 3, where the detection method includes:
step 301: the pressure sensor transmits the detected pressure value borne by the detection probe to the equipment main body.
In one specific implementation, if the pressure sensor is arranged on the convex part of the detection probe, a conversion circuit is required to be arranged, and the conversion circuit converts a signal output by the pressure sensor into a voltage value; the conversion circuit transmits the voltage value to the apparatus main body.
It should be noted that, for a pressure sensor that does not need to be provided with a conversion circuit, the pressure sensor may directly transmit the obtained pressure value to the device main body, and the conversion circuit may be set and adjusted according to the type of the pressure sensor, which is not limited here.
Step 302: the equipment main body judges whether the object to be detected is placed according to the pressure value.
Specifically, the device body judges whether the pressure value is greater than or equal to a preset threshold value; if yes, the main body of the device determines that the object to be detected is placed.
Step 303: and starting a detection process after the main body of the equipment determines that the object to be detected is placed.
It should be understood that this embodiment is a method example corresponding to the first embodiment, and may be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment.
A fourth embodiment of the present application relates to a detection method, and the fourth embodiment is substantially the same as the third embodiment, and mainly differs in that the fourth embodiment further includes a processing manner of detecting an interrupt during the detection process, as specifically shown in fig. 4.
It should be noted that the detection interruption that may occur is after the start of the detection process, that is, after step 303 in the third embodiment, and therefore steps 301 to 303 in this embodiment are not described again, and only the steps added after step 303 are described.
Step 401: if the device main body determines that the obtained pressure value is changed from being larger than or equal to the preset threshold value to being smaller than the preset threshold value.
Step 402: the device body saves the acquired spectral data or the recorded detection duration and gives a prompt that the detection is not completed.
Step 403: and if the obtained force value is determined to be larger than or equal to the preset threshold value within the preset time length by the equipment main body.
Step 404: the apparatus main body extracts the obtained spectral data to continue the detection.
The present embodiment is an embodiment of a method corresponding to the above optical detection apparatus, and the technical details mentioned in the above embodiments are still applicable in the present embodiment, and are not described herein again.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
A fifth embodiment of the present application relates to a computer-readable storage medium, which is a computer-readable storage medium having computer instructions stored therein, the computer instructions enabling a computer to execute the detection method according to the third or fourth embodiment of the present application.
It should be noted that, as can be understood by those skilled in the art, the display method in the foregoing embodiments is implemented by instructing, by a program, related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random-access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice.
Claims (7)
1. An optical inspection apparatus, comprising: the device comprises a device main body, a detection probe and a pressure sensor, wherein the pressure sensor is arranged at the joint of the detection probe and the device main body, the detection probe is aligned with a light inlet and a light outlet of the device main body, and the pressure sensor is in communication connection with the device main body;
the pressure sensor is used for detecting a pressure value borne by the detection probe and transmitting the pressure value to the equipment main body;
the equipment main body is used for acquiring the pressure value transmitted by the pressure sensor, judging whether the object to be detected is placed according to the pressure value, and starting a detection process after the object to be detected is determined to be placed;
wherein, whether there is the thing that waits to detect of placing according to the pressure value judgement includes: and judging whether the pressure value is greater than or equal to a preset threshold value, if so, determining that the object to be detected is placed.
2. The optical detection device according to claim 1, wherein a conversion circuit is provided on the detection probe, the conversion circuit being electrically connected to the pressure sensor and communicatively connected to the device body;
the conversion circuit converts a signal output from the pressure sensor into a voltage value and transmits the voltage value to the apparatus main body.
3. The optical detection apparatus of claim 1, wherein the apparatus body is configured to:
when the obtained pressure value is determined to be changed from being larger than or equal to the preset threshold value to being smaller than the preset threshold value, the obtained spectrum data or the recorded detection duration is stored, and a prompt that the detection is not finished is sent;
and if the obtained pressure value is determined to be greater than or equal to the preset threshold value within the preset time, extracting the obtained spectral data and continuing to detect.
4. The optical detection device of claim 3, wherein the spectral data includes at least: one of a substance spectrum and a reflectance spectrum.
5. An inspection method applied to the optical inspection apparatus according to any one of claims 1 to 4, comprising:
the pressure sensor transmits the detected pressure value borne by the detection probe to the equipment main body;
the equipment main body judges whether an object to be detected is placed or not according to the pressure value;
and starting a detection process after the main body of the equipment determines that the object to be detected is placed.
6. The detection method according to claim 5, wherein the device body judges whether an object to be detected is placed according to the pressure value, and comprises:
the equipment main body judges whether the pressure value is greater than or equal to a preset threshold value;
if yes, the equipment main body determines that the object to be detected is placed.
7. The detection method according to claim 5, wherein after the detection process is started after the apparatus body determines that the object to be detected is placed, the detection method comprises:
if the device main body determines that the obtained pressure value is changed from being larger than or equal to the preset threshold value to being smaller than the preset threshold value, the obtained spectral data or the recorded detection duration is stored, and a prompt that the detection is not finished is sent;
and if the obtained pressure value is determined to be greater than or equal to the preset threshold value within the preset time, extracting the obtained spectral data for continuous detection.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/084015 WO2019204955A1 (en) | 2018-04-23 | 2018-04-23 | Optical detection device and detection method |
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| CN108780036A CN108780036A (en) | 2018-11-09 |
| CN108780036B true CN108780036B (en) | 2021-10-22 |
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| CN201880001109.3A Active CN108780036B (en) | 2018-04-23 | 2018-04-23 | Optical detection equipment and detection method |
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| WO (1) | WO2019204955A1 (en) |
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| CN208547562U (en) * | 2018-04-23 | 2019-02-26 | 深圳达闼科技控股有限公司 | A kind of optical detection apparatus |
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| WO2019204955A1 (en) | 2019-10-31 |
| CN108780036A (en) | 2018-11-09 |
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