CN114812449B - Finish detection device and finish detection method - Google Patents
Finish detection device and finish detection method Download PDFInfo
- Publication number
- CN114812449B CN114812449B CN202210422035.9A CN202210422035A CN114812449B CN 114812449 B CN114812449 B CN 114812449B CN 202210422035 A CN202210422035 A CN 202210422035A CN 114812449 B CN114812449 B CN 114812449B
- Authority
- CN
- China
- Prior art keywords
- workpiece
- finish
- infrared light
- clamping
- detected
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 95
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 27
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 15
- 238000007689 inspection Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 15
- 238000000691 measurement method Methods 0.000 abstract description 7
- 230000004044 response Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to a finish detection device and a finish detection method, wherein the finish detection device comprises a clamping jig, a detection module and a display module, a detected workpiece is clamped and fixed in a clamping gap of the clamping jig, the detection module can emit infrared light, part of the infrared light is absorbed by carbon dioxide gas, the rest infrared light can irradiate the inner surface of the detected workpiece and is reflected, the reflected infrared light can be received by the detection module and converted into an electric signal, the electric signal is converted into an AD value observable by a user to represent the finish of the surface of the detected workpiece, so that the finish detection method is not influenced by the internal structural shape of the detected workpiece, the user can judge the finish of the inner surface of the detected workpiece only by reading the detected AD value, the measurement method is simple and convenient, the measurement result response speed block is avoided from being influenced by artificial subjective factors during measurement, and the measurement result is accurate.
Description
Technical Field
The invention relates to the technical field of surface quality detection, in particular to a finish detection device and a finish detection method.
Background
In the field of mechanical manufacturing, a large number of machined metal parts on an industrial production line are subjected to machining and polishing, so that the requirements on optical cleanliness of technical standards are met, and the machining methods are different due to the fact that the number of the parts to be machined on site is large, and the materials of different parts are different. Different materials and various processing methods, including friction between a cutting tool and the surface of a part, plastic deformation of surface layer metal during chip separation, high-frequency vibration in a process system and other factors, can lead the surface of the part to leave marks and shapes with different depths and densities, so that the finish degree of the surface of the part can be influenced, and when the finish degree of the surface of the part is influenced, the detection precision of a large number of detection instruments can be influenced.
Therefore, if the surface finish of the part can be rapidly detected, the production efficiency and the economic benefit can be greatly improved. The existing finish measurement method mainly comprises a microscope comparison method and an interference microscope measurement method, wherein the microscope measurement method is to compare a sample comparison block with a measured sample under a microscope and adopts a visual method or a touch method for comparison, but the method is greatly influenced by human subjective factors, so that the measurement result has large difference, and the observation angle of parts with irregular shapes is greatly limited. The interference microscope measurement method is to measure the finish degree by taking a plane reflecting mirror as a reference, but the accuracy of measurement can be affected to a certain extent for cavity parts with small volume and complex structure.
Disclosure of Invention
Based on the above, it is necessary to provide a finish detection device and a finish detection method capable of rapidly and simply detecting the finish of the inner surface of an irregularly shaped part, aiming at the problems that the conventional finish detection device and detection method are not rapid and simple, and the measurement result is inaccurate due to the limitation of the shape of the measured workpiece during measurement.
According to one aspect of the present application, there is provided a finish detection device for detecting the finish of an inner surface of a workpiece to be detected, comprising:
the clamping jig is used for clamping the tested workpiece and is provided with a clamping gap with a variable size, and the tested workpiece can be clamped in the clamping gap;
The detection module is arranged on the clamping jig and is used for connecting the detected workpiece, the detection module is provided with an infrared light emitting port and an infrared light receiving port which are arranged at intervals, the infrared light emitting port can emit infrared light, the infrared light receiving port can receive the infrared light reflected by the detected workpiece, and the reflected infrared light is converted into an electric signal used for representing the inner surface finish of the detected workpiece; and
The display module is in communication connection with the detection module and is used for displaying the detection result of the detection module.
In one embodiment, the detection module includes a substrate, a light source and an infrared sensor, the light source and the infrared sensor are respectively electrically connected to the substrate, the light source forms the infrared light emitting port, and the infrared sensor forms the infrared light receiving port.
In one embodiment, the clamping jig includes:
The base is used for installing the detection module;
The clamping assembly is movably arranged on the base and can move relative to the base under the action of external force so as to be capable of propping against and clamping the tested workpiece.
In one embodiment, the clamping assembly includes a handle rotatably mounted on the base and a collet coupled to the handle, the collet being capable of following the handle to rotate about a first direction toward or away from the base to form the clamping gap with the base.
In one embodiment, the clamping assembly further comprises a hanger, one end of the hanger is connected with the grab handle, and the other end of the hanger is connected with the clamping head.
In one embodiment, the clip is removably fixedly mounted to the hanger, the clip being mountable at different locations on the hanger in a direction toward or away from the grip.
According to another aspect of the present application, there is provided a finish detection method, the detection method being implemented based on the detection apparatus as described above, the detection method comprising the steps of:
Installing a workpiece to be tested;
Starting a detection module to emit infrared light, so that part of the infrared light is absorbed by carbon dioxide gas in the environment, and the rest of the infrared light is reflected by the inner surface of the workpiece to be detected;
and measuring by the detection module to obtain a measured value of the inner surface finish of the workpiece to be detected.
In one embodiment, the step of installing the workpiece to be tested further includes the steps of:
Covering a tested workpiece on a substrate so that a light source on the substrate is accommodated in the tested workpiece;
clamping the workpiece to be tested.
In one embodiment, the step of clamping the workpiece to be tested further includes the steps of:
rotating the grab handle to enable the clamping head to prop against the tested workpiece;
And fixing the clamping head to enable the tested workpiece to be fixedly installed in the clamping gap.
In one embodiment, the step of measuring to obtain a measured value of the inner surface finish of the workpiece comprises the steps of:
Receiving the reflected infrared light by an infrared sensor on the substrate;
converting the reflected infrared light into an electrical signal;
And converting the electric signal into an AD value, wherein when the AD value is within a specified range, the inner surface finish of the tested workpiece meets the requirement.
According to the finish detection device and the finish detection method, the clamping jig with the variable clamping gap is arranged in the finish detection device, the detection module is arranged on the clamping jig, and the display module electrically connected with the detection module is arranged, so that the workpiece to be detected can be conveniently installed in the finish detection device, and the workpiece to be detected is convenient to assemble and disassemble. During detection, the detected workpiece is fixedly clamped in the clamping gap of the clamping jig, the detected workpiece is connected with the detection module, meanwhile, an infrared light emitting port of the detection module can emit infrared light, part of the infrared light is absorbed by carbon dioxide gas in the environment, the rest infrared light can irradiate the inner surface of the detected workpiece and is reflected by the inner surface of the detected workpiece, the reflected infrared light can be received by an infrared light receiving port of the detection module and converted into an electric signal, the electric signal is converted into an AD value which can be observed by a user by the display module to represent the finish degree of the surface of the detected workpiece, so that the finish degree detection method is not influenced by the internal structural shape of the detected workpiece, the finish degree of the inner surface of the part with any shape inner cavity can be detected, a user can judge the finish degree of the inner surface of the detected workpiece only by reading the detected AD value, the measurement method is simple and convenient, the response speed of the measurement result is not influenced by artificial subjective factors when the user is measured, and the measurement result is accurate.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only one embodiment of the invention, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a finish inspection device with a workpiece to be inspected according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a finish inspection device according to an embodiment of the present invention without a workpiece to be inspected;
FIG. 3 is an enlarged schematic view of area A of FIG. 2;
fig. 4 is a schematic perspective view of a detection module according to an embodiment of the present invention;
fig. 5 is an exploded view of a finish inspection device with a workpiece to be inspected according to an embodiment of the present invention.
Reference numerals illustrate:
10. a finish detection device;
100. Clamping the jig; 110. a base; 111. a base body; 1111. a mounting position; 1112. a limit groove; 112. a mounting block; 1121. a through hole; 113. a connecting piece; 120. a clamping assembly; 121. a grab handle; 122. a hanging rack; 1221. a first connection end; 1222. a second connection end; 123. a chuck; 1231. a nut; 1232. a mounting hole;
200. A detection module; 210. a substrate; 211. pins; 220. a light source; 230. an infrared sensor; 30. a workpiece to be tested; 31. a housing; 32. a partition board.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less in horizontal height than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
As described in the background art, the number of parts to be processed on an industrial production line is large, and various materials and various processing methods, including friction between a cutting tool and the surface of the part, plastic deformation of surface layer metal during chip separation, high-frequency vibration in a process system, and other factors, can cause marks and shapes with different depths and densities to be left on the surface of the part, so that the smoothness of the surface of the part can be affected. Taking NDIR (Non DISPERSIVE INFRA-Red, non-dispersive infrared) carbon dioxide sensor as an example, the sensor is used for measuring the concentration of carbon dioxide gas in the environment, and because the sensor needs to reflect the incident infrared light by utilizing the air chamber inside the sensor to obtain the concentration of the carbon dioxide gas, when the smoothness of the air chamber is affected, the detection precision of the sensor on the carbon dioxide gas in the environment is also affected.
The traditional finish detection method generally adopts a visual method or a tactile method to measure the finish, the method is greatly influenced by human subjective factors, the measurement result is greatly different, the observation angle of parts with irregular shapes is greatly limited, and the measurement accuracy is greatly reduced.
In order to solve the problem, the inventor of the present application has conducted intensive studies and devised a finish detection device and a finish detection method capable of rapidly and simply detecting the finish of the inner surface of an irregularly shaped part.
According to the non-dispersive infrared (NDIR) principle, when a beam of parallel monochromatic light passes perpendicularly through a uniform non-dispersive light absorbing substance, its absorbance is proportional to the concentration of the light absorbing substance and the thickness of the absorbing layer. Based on the principle of non-dispersive infrared (NDIR), the working principle of an NDIR carbon dioxide sensor is that carbon dioxide gas to be measured continuously passes through a gas chamber with a certain volume, and a broad-spectrum light source is utilized to make a beam of infrared light with the wavelength of 1-20 mu m enter the gas chamber from one end of the gas chamber, because the carbon dioxide gas can absorb infrared light with the wavelength of 4.26 mu m, after passing through a narrow-band filter with the wavelength of 4.26 mu m, the infrared light with the wavelength of 4.26 mu m is filtered, part of infrared light with the wavelength of 4.26 mu m can be absorbed by the carbon dioxide gas, at the moment, the rest infrared light is reflected by the inner wall of the gas chamber and then reflected to the other end of the gas chamber, when the concentration of the carbon dioxide gas in the environment is different, the obtained voltage value output by infrared light conversion of the wavelength of 4.26 mu m also generates corresponding change, according to the principle that the absorption of the infrared light is in proportion to the concentration of light absorbing substances, the voltage value is converted into the result which can be displayed and read by a user.
Based on the above, the inventor thinks that the working principle of measuring the carbon dioxide gas concentration by the NDIR carbon dioxide sensor can be utilized to measure the finish of the surface of the air chamber in the NDIR carbon dioxide sensor, and the finish of the surface of the air chamber can be known by incident infrared light into the air chamber when the finish of the surface of the air chamber is different due to the constant concentration of the carbon dioxide gas in the environment in the same environment. The detection method solves the problems that the existing finish detection method is not fast and simple to detect, and is limited by factors such as the shape of the detected workpiece during detection, so that the measurement result is inaccurate.
The following describes the structure of the device and the method for detecting the finish of the air chamber of the NDIR carbon dioxide sensor in detail, but the present embodiment is only used as an example and does not limit the technical scope of the application. It will be appreciated that in other embodiments, the disclosed finish detection apparatus and finish detection method may be used, without limitation, to detect the surface finish of a gas cell of an NDIR carbon dioxide sensor, and may also be used to detect the internal surface finish of other types of parts, none of which are limiting.
Some preferred embodiments of the present application for a finish detection device and a finish detection method are described below with reference to fig. 1 to 5.
As shown in fig. 1 and 2, a finish detecting device 10 includes a clamping fixture 100, a detecting module 200 and a display module (not shown). The clamping jig 100 is used for clamping a workpiece, and has a clamping gap with a variable size, wherein the workpiece 30 to be tested can be clamped in the clamping gap; the detection module 200 is arranged on the clamping jig 100 and used for connecting the detected workpiece 30, the detection module 200 is provided with an infrared light emitting port and an infrared light receiving port which are arranged at intervals, wherein the infrared light emitting port can emit infrared light, the infrared light receiving port can receive the infrared light reflected by the detected workpiece 30, and the reflected infrared light is converted into an electric signal used for representing the inner surface finish of the detected workpiece; the display module is communicatively connected to the detection module 200, and is configured to display a detection result of the detection module 200.
In some embodiments, the clamping jig 100 includes a base 110 and a clamping assembly 120, wherein the base 110 is used to mount the detection module 200, and the clamping assembly 120 is movably mounted on the base 110. Specifically, the base 110 includes a base body 111, a mounting block 112, and a connector 113. The base body 111 is provided with a recessed mounting position 1111, the mounting block 112 is mounted on the base body 111 and is accommodated in the mounting position 1111, and the detection module 200 is mounted on the upper surface of the mounting block 112.
In a preferred embodiment, the mounting block 112 is detachably mounted on the base body 111, specifically by the following embodiment, two opposite side walls of the mounting position 1111 are provided with limiting grooves 1112, and when the mounting block 112 is mounted on the base body 111, two sides of the mounting block are limited in the limiting grooves 1112, and can slide into and be accommodated in the mounting position 1111 along the limiting grooves 1112, and placed on the bottom wall of the mounting position 1111. Since the mounting block 112 is detachably mounted on the base body 111, a user can conveniently replace the mounting block 112 of different heights so as to fit and mount the workpiece 30 of different height sizes. In other embodiments, the mounting block 112 may be fixed to the base body 111 and formed integrally with the base body 111, and is not limited herein.
Preferably, the height of the mounting block 112 is smaller than the depth of the mounting position 1111, so that the upper surface of the mounting block 112 is lower than the upper surface of the base body 111 when the mounting block is installed in the mounting position 1111, and the workpiece 30 is at least partially accommodated in the mounting position 1111 when the workpiece 30 is connected to the detection module 200, thereby facilitating clamping and fixing of the workpiece 30.
Further, the mounting block 112 is provided with a through hole 1121 penetrating the mounting block 112, and the through hole 1121 is used for reducing the weight of the mounting block 112 and can also be used for running a line. The connecting member 113 is fixedly mounted on the upper surface of the base body 111 and is used for connecting the clamping assembly 120, and the clamping assembly 120 is movably mounted on the connecting member 113 and can move relative to the base 110 under the action of external force so as to be capable of abutting against and clamping a workpiece.
In some embodiments, the clamping assembly 120 includes a grip 121, a hanger 122, and a collet 123. One end of the handle 121 is rotatably installed on the connecting piece 113 of the base 110, and the other end of the handle 121 is held by a user; the hanging frame 122 is vertically arranged with the grab handle 121, one end of the hanging frame 122 is connected with the grab handle 121 and is rotatably connected with the connecting piece 113, the other end of the hanging frame 122 is connected with the clamping head 123, so that the clamping head 123 is matched and connected with the grab handle 121 through the hanging frame 122; the collet 123 is detachably and fixedly mounted on the hanger 122, and the collet 123 is disposed perpendicular to the hanger 122 such that the collet 123 and the grip 121 are parallel to each other.
Specifically, as shown in fig. 3, one end of the grip 121 is hinged to the connection member 113 of the base 110; the hanger 122 has a first connection end 1221 and a second connection end 1222 at an end remote from the collet 123, the first connection end 1221 and the second connection end 1222 being perpendicular to each other, wherein the first connection end 1221 is hinged to the handle 121 and the second connection end 1222 is hinged to the connection member 113 of the base 110. In this way, through the above connection manner, the handle 121 and the hanger 122 can rotate together relative to the base 110, and meanwhile, no relative movement can occur between the handle 121 and the hanger 122, and the disassembly and assembly can be facilitated.
Preferably, the hanger 122 is provided with a mounting hole 1232 penetrating through the hanger 122 at opposite ends of the clip 123 in the axial direction, the dash-dot line in fig. 3 indicates the axial direction of the clip 123, the mounting hole 1232 is approximately a waist hole, the long edge thereof extends in the direction perpendicular to the handle 121, the clip 123 passes through the mounting hole 1232 and is detachably mounted on the outer periphery of the mounting hole 1232, and the clip 123 is fixed to the hanger 122 by a nut 1231, and the mounting position of the clip 123 on the hanger 122 can be changed by loosening the nut 1231. Specifically, the collet 123 can be mounted at various positions on the hanger 122 in a direction approaching or separating from the grip 121 (i.e., in an extending direction along the length of the mounting hole 1232), and the workpiece 30 can be more firmly clamped by adjusting the mounting position of the collet 123 on the hanger 122 when there is a change in the width dimension direction of the dimension of the workpiece 30.
In this way, when the user holds the handle 121 to rotate around an axial direction perpendicular to the chuck 123, the hanger 122 and the chuck 123 can be driven to rotate together around the axial direction perpendicular to the chuck 123, so that the chuck 123 can be close to or far away from the base 110 to form a clamping gap with the base 110, thereby facilitating clamping of the tested workpiece 30 with different height dimensions, and facilitating removal of the tested workpiece 30 from the clamping jig 100 and replacement of a new tested workpiece 30.
In some embodiments, as shown in fig. 4, the detection module 200 includes a substrate 210, a light source 220, and an infrared sensor 230. The substrate 210 is mounted on the mounting block 112 of the base 110, and the light source 220 and the infrared sensor 230 are electrically connected to the substrate 210, respectively. The light source 220 is used for emitting infrared light to form an infrared light emitting port of the detection module 200; the infrared sensor 230 is configured to receive infrared light reflected by the workpiece 30 to form an infrared light receiving port of the detection module 200, and convert the infrared light signal into an electrical signal, such as a current signal or a voltage signal, and the substrate 210 is configured to supply power to the light source 220 and the infrared sensor 230.
Preferably, the infrared sensor 230 may be an infrared thermopile sensor, the thermopile inside of which is composed of a plurality of thermocouples connected in series, and when infrared light is applied to the thermopile, the thermocouple of the thermopile heats to generate a smaller thermoelectric voltage signal, so that the thermoelectric voltage signal is conveniently amplified and converted into a detection result which can be displayed, and the detection result can be an Analog signal or an AD (Analog-Digital) value displayed in a curve form, so long as the detection result can be recognized by a user to obtain the inner surface finish of the workpiece 30.
The substrate 210 has a plurality of pins 211 arranged at intervals for being in communication connection with the display module, so as to transmit the converted electrical signal to the display module for the display module to amplify and display the electrical signal.
In this embodiment, as shown in fig. 1,3 and 5, the workpiece 30 to be measured is a housing of an NDIR carbon dioxide sensor, and includes a housing 31 and a partition plate 32, where the partition plate 32 and the housing 31 together form an optical air chamber of the NDIR carbon dioxide sensor, and the optical air chamber may have any irregular shape. Referring to fig. 1 and 5, the method for detecting the surface finish of the air chamber of the NDIR carbon dioxide sensor based on the finish detection device 10 provided by the present application is as follows:
First, the workpiece 30 to be measured is installed, the workpiece 30 to be measured is covered on the substrate 210, so that the light source 220 on the substrate 210 is accommodated in the workpiece 30 to be measured, the infrared light emitted by the light source 220 can not leak out of the workpiece 30 to be measured, reflection and absorption can be fully performed in the workpiece 30 to be measured, and accuracy of measurement results is ensured.
Step two, clamping the workpiece 30 to be tested, and rotating the grab handle 121 to enable the clamping head 123 to be abutted against the workpiece 30 to be tested; the nut 1231 on the collet 123 is screwed to press the collet 123 against the workpiece 30 to be tested, and the workpiece 30 to be tested is fixed on the detection module 200.
In the third step, the inspection module 200 is turned on, and the light source 220 of the inspection module 200 emits infrared light, a part of which is absorbed by carbon dioxide gas in the environment, and the remaining infrared light is reflected by the inner surface of the inspection workpiece 30.
Fourth, the AD value of the inner surface finish of the workpiece 30 to be measured is measured and read. Specifically, the infrared sensor 230 on the detection module 200 receives the reflected infrared light, the infrared light is applied to the thermopile of the infrared sensor 230, the thermopile heats up to generate a smaller thermoelectric voltage signal, and then the voltage signal is subjected to operational amplification; the amplified voltage signal is sampled, quantized and coded by a display module and then converted into an AD value which can be displayed and read.
As described above, according to the operating principle of the NDIR carbon dioxide sensor, the degrees of absorption of the carbon dioxide gas with different concentrations to the infrared light with the same wavelength are different, the light intensity detected by the infrared sensor 230 is also different, and in the same environment, the concentration of the carbon dioxide gas in the air is usually kept within a certain range, the finish of the inner surface of the measured workpiece 30 is different, and the measured AD value is also different, so that the finish of the inner surface of the measured workpiece 30 can be represented, and when the AD value is within a specified range, for example, within a range of 10000-18000, the finish of the inner surface of the measured workpiece 30 meets the requirements.
The finish detection method has at least the following technical effects: the detection method is not affected by the internal structure of the workpiece 30 to be detected, no matter what the air chamber is in any shape, the carbon dioxide gas of the air in the sensor air chamber is detected by utilizing the non-dispersive infrared (NDIR) principle, the AD value is finally transmitted back, the smoothness of the inner surface can be judged only by reading the AD value detected by the infrared sensor 230, the measurement response speed is high, the influence of artificial subjective factors is avoided, the measurement method is simple and convenient, and the measurement result is accurate.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only one embodiment of the invention, which is described in more detail and is not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (10)
1. A finish detection device for detecting the finish of an inner surface of a workpiece to be detected, comprising:
The clamping jig is used for clamping the tested workpiece and is provided with a clamping gap with a variable size, and the tested workpiece can be clamped in the clamping gap; the clamping jig comprises a base, wherein the base comprises a base body and a mounting block, a recessed mounting position is formed in the base body, and the mounting block is mounted on the base body and is accommodated in the mounting position; the height of the mounting block is smaller than the depth of the mounting position, so that the upper surface of the mounting block is lower than the upper surface of the base body;
the detection module is arranged on the upper surface of the mounting block, is used for connecting the detected workpiece and is covered by the detected workpiece, and is provided with an infrared light emitting port and an infrared light receiving port which are arranged at intervals, wherein the infrared light emitting port can emit infrared light, the infrared light receiving port can receive the infrared light reflected by the detected workpiece, and the reflected infrared light is converted into an electric signal for representing the finish of the inner surface of the detected workpiece; and
The display module is in communication connection with the detection module and is used for displaying the detection result of the detection module.
2. The finish detection device of claim 1, wherein the detection module comprises a substrate, a light source and an infrared sensor, the light source and the infrared sensor being electrically connected to the substrate, respectively, the light source forming the infrared light emitting port and the infrared sensor forming the infrared light receiving port.
3. The finish detection device of claim 2, wherein the clamping jig comprises:
The clamping assembly is movably arranged on the base and can move relative to the base under the action of external force so as to be capable of propping against and clamping the tested workpiece.
4. The finish detection device of claim 3, wherein the clamping assembly comprises a grip rotatably mounted on the base and a collet coupled to the grip, the collet being capable of following rotation of the grip about an axial direction perpendicular to the collet to move closer to or farther from the base to form the clamping gap with the base.
5. The finish detection device of claim 4, wherein the clamping assembly further comprises a hanger having one end connected to the grip and another end connected to the collet.
6. The finish detection device of claim 5, wherein the cartridge is removably fixedly mounted to the hanger, the cartridge being mountable at different locations on the hanger in a direction toward or away from the grip.
7. A finish detection method, wherein the detection method is implemented based on the detection apparatus as claimed in any one of claims 4 to 6, the detection method comprising the steps of:
Installing a workpiece to be tested;
Starting a detection module to emit infrared light, so that part of the infrared light is absorbed by carbon dioxide gas in the environment, and the rest of the infrared light is reflected by the inner surface of the workpiece to be detected;
and measuring by the detection module to obtain a measured value of the inner surface finish of the workpiece to be detected.
8. The method of claim 7, wherein the step of installing the workpiece under test further comprises the steps of:
Covering a tested workpiece on a substrate so that a light source on the substrate is accommodated in the tested workpiece;
clamping the workpiece to be tested.
9. The finish inspection method according to claim 8, wherein the step of clamping the workpiece to be inspected further comprises the steps of:
rotating the grab handle to enable the clamping head to prop against the tested workpiece;
And fixing the clamping head to enable the tested workpiece to be fixedly installed in the clamping gap.
10. The method of claim 8, wherein the step of measuring a measured value of the inner surface finish of the workpiece comprises the steps of:
Receiving the reflected infrared light by an infrared sensor on the substrate;
converting the reflected infrared light into an electrical signal;
And converting the electric signal into an AD value, wherein when the AD value is within a specified range, the inner surface finish of the tested workpiece meets the requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210422035.9A CN114812449B (en) | 2022-04-21 | 2022-04-21 | Finish detection device and finish detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210422035.9A CN114812449B (en) | 2022-04-21 | 2022-04-21 | Finish detection device and finish detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114812449A CN114812449A (en) | 2022-07-29 |
| CN114812449B true CN114812449B (en) | 2024-05-03 |
Family
ID=82505168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210422035.9A Active CN114812449B (en) | 2022-04-21 | 2022-04-21 | Finish detection device and finish detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114812449B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278113A (en) * | 2013-02-27 | 2013-09-04 | 中国林业科学研究院木材工业研究所 | Method for rapidly measuring surface roughness of timber in non-contact manner |
| WO2013179444A1 (en) * | 2012-05-31 | 2013-12-05 | 三洋電機株式会社 | Measurement device for texture size, manufacturing system for solar cell, and manufacturing method for solar cell |
| CN103615992A (en) * | 2013-11-15 | 2014-03-05 | 南京航空航天大学 | Method and device for detecting roughness of inner surface of micro-pore |
| CN104567755A (en) * | 2014-12-25 | 2015-04-29 | 昆山元茂电子科技有限公司 | Automatic detection device for surface flatness of small-size circuit board |
| JP2016179940A (en) * | 2016-05-31 | 2016-10-13 | 株式会社Sumco | Evaluation method of silica glass crucible and manufacturing method of silicon single crystal |
| CN206905997U (en) * | 2017-04-26 | 2018-01-19 | 共青城旭鸿光学有限公司 | A kind of laser testing equipment of lens surface finish |
| CN108680126A (en) * | 2018-04-27 | 2018-10-19 | 上海集成电路研发中心有限公司 | A kind of device and method of detection pipeline inner wall roughness |
| CN210570547U (en) * | 2019-11-28 | 2020-05-19 | 广东兴鑫纳米技术有限公司 | Be used for cell-phone coating film check out test set |
| JP6714222B1 (en) * | 2019-08-16 | 2020-06-24 | 温州市委暁電子科技有限公司 | High-grade ceramic tile flatness and backlitness measuring instrument |
| CN112577938A (en) * | 2020-12-08 | 2021-03-30 | 广西电网有限责任公司电力科学研究院 | Method and device for detecting internal smoothness of gas chamber of GIS (gas insulated switchgear) |
| CN215217529U (en) * | 2021-07-01 | 2021-12-17 | 浦项引富拉(苏州)汽车配件制造有限公司 | Clutch disc flatness detection device |
-
2022
- 2022-04-21 CN CN202210422035.9A patent/CN114812449B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013179444A1 (en) * | 2012-05-31 | 2013-12-05 | 三洋電機株式会社 | Measurement device for texture size, manufacturing system for solar cell, and manufacturing method for solar cell |
| CN103278113A (en) * | 2013-02-27 | 2013-09-04 | 中国林业科学研究院木材工业研究所 | Method for rapidly measuring surface roughness of timber in non-contact manner |
| CN103615992A (en) * | 2013-11-15 | 2014-03-05 | 南京航空航天大学 | Method and device for detecting roughness of inner surface of micro-pore |
| CN104567755A (en) * | 2014-12-25 | 2015-04-29 | 昆山元茂电子科技有限公司 | Automatic detection device for surface flatness of small-size circuit board |
| JP2016179940A (en) * | 2016-05-31 | 2016-10-13 | 株式会社Sumco | Evaluation method of silica glass crucible and manufacturing method of silicon single crystal |
| CN206905997U (en) * | 2017-04-26 | 2018-01-19 | 共青城旭鸿光学有限公司 | A kind of laser testing equipment of lens surface finish |
| CN108680126A (en) * | 2018-04-27 | 2018-10-19 | 上海集成电路研发中心有限公司 | A kind of device and method of detection pipeline inner wall roughness |
| JP6714222B1 (en) * | 2019-08-16 | 2020-06-24 | 温州市委暁電子科技有限公司 | High-grade ceramic tile flatness and backlitness measuring instrument |
| CN210570547U (en) * | 2019-11-28 | 2020-05-19 | 广东兴鑫纳米技术有限公司 | Be used for cell-phone coating film check out test set |
| CN112577938A (en) * | 2020-12-08 | 2021-03-30 | 广西电网有限责任公司电力科学研究院 | Method and device for detecting internal smoothness of gas chamber of GIS (gas insulated switchgear) |
| CN215217529U (en) * | 2021-07-01 | 2021-12-17 | 浦项引富拉(苏州)汽车配件制造有限公司 | Clutch disc flatness detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114812449A (en) | 2022-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20050264817A1 (en) | Systems and methods for in situ spectroscopic measurements | |
| CN107664478B (en) | Vertical non-contact gyrosome high-precision measuring device and measuring method thereof | |
| US8735851B2 (en) | Device and method for quantifying a surface's cleanliness | |
| JPH0153401B2 (en) | ||
| CN1666093A (en) | Ultrasensitive spectrophotometer | |
| US4914828A (en) | Surface inspection device and method | |
| CN103884671A (en) | Nondispersive infrared (NDIR) CO2 gas sensor | |
| CN107796321A (en) | A kind of cylinder bore diameter detection device | |
| CN114812449B (en) | Finish detection device and finish detection method | |
| CN109297933A (en) | A kind of aciculiform vegetation blade reflective spectral measure instrument and measurement method | |
| US5570183A (en) | Apparatus for measuring optical characteristics of a surface in two dimensions using a moving light source | |
| EP1754045B1 (en) | Apparatus for in situ spectroscopic measurements | |
| CN212964629U (en) | Raman spectrometer | |
| CN110849233B (en) | Online measurement method for effective volume of piston cylinder of piston type gas flow standard device | |
| CN114324166A (en) | Self-cleaning fine spectrum water body parameter measuring device and method based on turbidity correction | |
| CN107238595B (en) | Alcohol concentration measuring device and measuring method for closed container | |
| CN209764717U (en) | Miniature near-infrared spectrometer transflectance survey appearance device | |
| CN114777692A (en) | Detection device and detection method for detecting inner surface smoothness of workpiece | |
| CN112611746A (en) | Absorption spectrum detection device and detection method for material micro-area | |
| CN209231204U (en) | A kind of laboratory test Fourier infrared spectrograph | |
| CN218496054U (en) | Utensil is examined to commentaries on classics mirror support | |
| CN212514254U (en) | Self-calibration detection device and detection system | |
| CN103633934A (en) | A space three-junction solar battery spectrum response test apparatus | |
| CN219607892U (en) | Hand-held bearing instrument checking fixture | |
| CN214749784U (en) | Absorption spectrum detection device for material micro-area |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |