Handheld spectrometer

Abstract

The invention relates to the technical field of spectrum detection, in particular to a handheld spectrometer which comprises a shell, a detection assembly and an adjusting assembly. A grip is arranged on the shell; the detection assembly comprises a detector and a display screen; the detector is arranged in the shell, a detection hole is formed in the shell, and the light emitting end of the detector extends out of the shell through the detection hole and is used for abutting against the detection face of an object to be detected so as to detect the object to be detected. The display screen is electrically connected with the detector to display the detection parameters; the adjusting assembly comprises a flexible connecting piece and a first elastic piece; the flexible connecting piece is arranged in the detection hole so as to flexibly connect the detector with the shell; the first elastic piece is arranged between the detector and the shell, and the first elastic piece enables the detector to pop out of the shell along the detection hole and enables the outer wall of the detector to be elastically connected with the inner wall of the shell. The method has the effect of improving the accuracy and the stability of the detection result of the spectrograph.

Description

Technical Field

[0001] This application relates to the technical field of spectral detection, and in particular to a handheld spectrometer. Background Art

[0002] A spectrometer is a scientific instrument that decomposes complex light into spectral lines and is composed of a prism or a diffraction grating, etc. Using a spectrometer, the light reflected from the surface of an object can be measured. The seven-color light in sunlight is the part that can be distinguished by the naked eye. However, if sunlight is decomposed by a spectrometer and arranged according to wavelength, the visible light only accounts for a very small range in the spectrum, and the rest are spectra that cannot be distinguished by the naked eye, such as infrared rays, microwaves, ultraviolet rays, X-rays, etc. By capturing the light information through a spectrometer, developing it on a photographic film, or displaying and analyzing it with a computerized automatic display numerical instrument, it is possible to know what elements are contained in an item. This technology is widely used in the detection of air pollution, water pollution, food hygiene, metal industry, etc.

[0003] In the prior art, when a handheld spectrometer detects an object, it is necessary to keep the light emitting end of the detector parallel to and in contact with the detection surface of the object to be measured, and then start the detection unit to emit detection light to detect the object to be measured. During the detection process, the operator needs to hold the spectrometer by hand so that its light emitting end is always in close contact with the detection surface of the object to be measured. However, the entire test process takes at least a dozen seconds, and at most twenty or thirty seconds or even one or two minutes. It is difficult for the operator to maintain a stable holding posture, and it is easy to cause the light emitting end of the detector to tilt or separate from the detection surface of the object to be measured due to hand shaking, which in turn leads to problems such as light leakage, seriously affecting the accuracy and stability of the detection results; in addition, when the light emitting end rigidly contacts the object to be measured, it will knock against the detector, easily causing damage to the internal components or lenses of the detector. Summary of the Invention

[0004] In order to improve the accuracy and stability of the detection results of the spectrometer, this application provides a handheld spectrometer.

[0005] A handheld spectrometer provided by this application adopts the following technical solutions: A handheld spectrometer, comprising: A housing, on which a grip is provided; A detection component, the detection component includes a detector and a display screen; the detector is arranged inside the housing, a detection hole is opened on the housing, and the light emitting end of the detector extends outside the housing through the detection hole to be in contact with the detection surface of the object to be measured for detecting it; the display screen is electrically connected to the detector to display detection parameters; An adjustment component, the adjustment component includes a flexible connector and a first elastic component; the flexible connector is arranged in the detection hole to flexibly connect the detector to the shell; the first elastic component is arranged between the detector and the shell, and the first elastic component can make the detector pop out of the shell along the detection hole and elastically connect the outer wall of the detector to the inner wall of the shell.

[0006] By adopting the above technical solution, during detection, the detection personnel holds the handle to bring the light emitting end of the detector close to the object to be detected and abut it against the object, and the first elastic member can provide a certain buffer protection in this process to prevent the detector from being directly in hard contact with the object to be detected and damaging the detector; during the detection process, when the detection personnel's hand shakes and causes the shell to tilt slightly or move away from the object to be detected, the detector can keep the light emitting end of the detector in close contact with the detection surface of the object to be detected under the action of the first elastic member, and the elastic connection between the detector and the shell can cause the detector and the shell to tilt to compensate for the tilt of the shell and the detection surface of the object to be detected; this design allows the detector to make appropriate adaptive adjustments following the posture changes of the shell, ensuring that even if the posture of the shell is unstable, the detector can maintain an ideal angle relationship with the object to be detected, thereby reducing light leakage and ultimately improving the accuracy and reliability of the spectrometer detection data.

[0007] Optionally, the adjustment assembly also includes an annular plate and at least three adjustment rods; the annular plate is sleeved on a side of the detector away from the light emitting end and is parallel to a side of the detector used to abut the object to be measured; the three adjustment rods are distributed parallel to each other on the outer periphery of the detector along the circumference of the detection hole and are slidably connected to the shell, and the sliding directions of the three adjustment rods are parallel to their own length directions; one end of the adjustment rod is slidably abutted against one side of the annular plate, and the other end extends outside the shell for slidably abutting against the detection surface of the object to be measured; when the ends of the three adjustment rods facing away from the annular plate are all in abutment with the object to be measured, the annular plate is parallel to the detection surface of the object to be measured, and the annular plate can make a side of the detector used to abut the object to be measured parallel to and abut the detection surface of the object to be measured.

[0008] By adopting the above technical solution, the adjustment component can significantly improve the ability of the detector to adaptively adjust according to the change of the shell posture. Specifically, during the detection process, if the shell and the detection surface of the object to be measured are tilted, the adjustment rod close to the side of the tilt direction will push the annular plate to deflect in the opposite direction due to the increased force. Since the annular plate is connected to the detector, this action will directly drive the detector to synchronously adjust the tilt angle to ensure that it always maintains a good fit with the detection surface of the object to be measured. At the same time, the special layout design of the adjustment rod effectively extends the force arm, which means that even if the object to be measured gives a slight reverse force to the adjustment rod, it is enough to cause the angle of the detector to change, thereby greatly improving the sensitivity and accuracy of the detector angle correction.

[0009] Optionally, it also includes a dust removal component, which includes a sleeve, a sealing plate and a second elastic member; the sleeve is sleeved on the outer periphery of the detector and is located on the side of the annular plate away from the light emitting end of the detector; one end of the sealing plate is sealed and connected to the outer wall of the detector, and the other end is sealed and connected to the end of the sleeve away from the annular plate; the inner wall and the outer wall of the annular plate are respectively sealed and slidably abutted against the outer wall of the detector and the inner wall of the sleeve to form a closed air cavity between the annular plate, the sleeve, the sealing plate and the detector; a connecting channel is provided on the detector, one end of the connecting channel is connected to the air cavity, and the other end is opened and extends to the light emitting end of the detector; the second elastic member is arranged between the sealing plate and the annular plate to make the annular plate bounce up toward the end of the sleeve away from the sealing plate; and when the annular plate bounces up, the end of the adjusting rod away from the annular plate protrudes from the light emitting end of the detector; when the annular plate moves to the extreme position close to the sealing plate, the end of the adjusting rod away from the annular plate is in the same plane as the light emitting end of the detector.

[0010] By adopting the above technical solution, dust or other impurities on the surface of the object to be tested can be removed before starting the test, ensuring that the detection light is not disturbed, thereby improving the detection accuracy. Specifically, during the test, when the light emitting end of the detector gradually approaches the object to be tested, the adjustment rod first contacts the object to be tested and pushes the annular plate to move toward the sealing plate. This action compresses the gas in the air cavity and causes the gas to be ejected from the light emitting end of the detector through the connecting channel, effectively removing dust and other impurities attached to the surface of the object to be tested; and when this process occurs, the light emitting end of the detector has not yet abutted against the object to be tested, and dust or impurities can flow from the gap between the detector and the object to be tested; in addition, the second elastic member can push the annular plate to reset after the test is completed and expand the air cavity to inhale air for the next test.

[0011] Optionally, the dust removal assembly also includes a flexible tube, a first one-way valve and a second one-way valve; one end of the flexible tube is connected to the air cavity, and the other end extends outside the shell to connect to the outside world; the first one-way valve is arranged on the flexible tube to prevent the gas in the air cavity from flowing out of the flexible tube; the second one-way valve is arranged in the connecting channel to prevent external gas from entering the air cavity through the connecting channel.

[0012] By adopting the above technical solution, the situation that dust is sucked up from the side of the object to be tested by the air cavity through the connecting channel and contaminates the lens of the detector during the reset process of the annular plate is effectively avoided. Specifically, when the annular plate moves toward the sealing plate, the gas in the air cavity will be compressed and can only be discharged through the connecting channel; and during the reset process of the annular plate, the external air can only be replenished into the air cavity through the flexible tube.

[0013] Optionally, sealing rings are provided between the inner wall of the annular plate and the detector, and between the outer wall of the annular plate and the sleeve.

[0014] By adopting the above technical solution, the setting of the sealing ring effectively enhances the sealing performance between the annular plate and the detector, and between the annular plate and the sleeve, prevents gas leakage, ensures the stability of the internal pressure of the air chamber, and thus improves the reliability of the dust removal component.

[0015] Optionally, the central axis of the adjusting rod is parallel to the central axis of the detection hole; the included angles between the connecting lines of the projection points of the central axes of the three adjusting rods on the plane perpendicular to the central axis of the detection hole are greater than 90° and less than 180° pairwise.

[0016] By adopting the above technical solution, it is ensured that the adjusting rod is evenly stressed during adjustment, and no matter which direction the housing tilts, the adjusting rod can sense and enable the annular plate to accurately correct the attitude of the detector, ensuring that the light emitting end of the detector and the detection surface of the object to be measured always remain parallel, further improving the accuracy and stability of the detection results of the spectrometer.

[0017] Optionally, universal ball heads are provided at both ends of the adjusting rod.

[0018] By adopting the above technical solution, the universal ball head can reduce the friction force when the adjusting rod slides against the annular plate and the object to be measured, ensuring smooth sliding of the adjusting rod while extending the service life of the components. In addition, during the process of adapting and adjusting the surface of the object to be measured, the design of the universal ball head helps to improve the fit between the end of the adjusting rod and the annular plate, thereby further ensuring the accurate alignment and parallelism between the light emitting end of the detector and the detection surface of the object to be measured, and improving the detection accuracy.

[0019] Optionally, the detection assembly further includes a control button and a battery; the control button is arranged on the grip; the control button is electrically connected to the detector to control the detector to emit detection light, and the battery is detachably connected to the grip for supplying power to the detector and the display screen.

[0020] By adopting the above technical solution, the operator can conveniently control the detector to emit detection light through the control button on the grip, improving the operation convenience of the device; at the same time, the detachable design of the battery not only facilitates replacement and charging, but also ensures the long-term use ability of the handheld spectrometer in outdoor or powerless environments, enhancing the practicality and flexibility of the device.

[0021] Optionally, it further includes a distance sensor disposed on one side of the housing close to the light emitting end of the detector for detecting the distance between the detector and the object to be measured; the distance sensor is electrically connected to the detector to control the opening and closing of the detector, and the detector is only turned on after the distance sensor detects that the detector and the object to be measured reach a predetermined distance.

[0022] By adopting the above technical solution, it is possible to achieve automatic activation when the detector approaches the object to be measured. Specifically, the setting of the distance sensor enables the detector to be turned on only when it reaches a predetermined distance from the object to be measured, avoiding energy waste caused by premature activation and the risk of accidental activation that may irradiate the operator's eyes. This design significantly improves the safety of spectrometer operation, ensures that the detection light is emitted under appropriate conditions, and improves the accuracy of the detection results.

[0023] Optionally, a rubber sleeve is provided on the outer wall of the grip.

[0024] By adopting the above technical solution, the rubber sleeve provided on the outer wall of the grip can increase the hand feeling when holding and improve the anti-slip performance, so that the tester can hold the spectrometer more stably, reduce the shaking of the device caused by hand slipping, and further improve the accuracy and stability of the detection results.

[0025] In summary, the present application includes the following beneficial technical effects: During detection, the tester holds the grip and brings the light emitting end of the detector close to the object to be measured and abuts against it. The first elastic member can provide a certain amount of buffer protection during this process to prevent the detector from directly contacting the object to be measured rigidly and damaging the detector; during the detection process, when the tester's hand shakes and causes the housing to tilt slightly or move away from the object to be measured, the detector can make the light emitting end of the detector always keep close contact with the detection surface of the object to be measured under the action of the first elastic member. The elastic connection between the detector and the housing can cause the detector and the housing to tilt to compensate for the tilt between the housing and the detection surface of the object to be measured; this design allows the detector to make appropriate adaptive adjustments following the attitude change of the housing, ensuring that even if the housing attitude is unstable, the detector can maintain an ideal angular relationship with the object to be measured, thereby reducing the light leakage phenomenon and ultimately improving the accuracy and reliability of the spectrometer detection data; The adjustment component can significantly enhance the ability of the detector to adaptively adjust according to the attitude change of the housing. Specifically, during the detection process, if the housing is tilted with respect to the detection surface of the object to be measured, the adjusting rod on the side closer to the tilt direction will push the annular plate to deflect in the opposite direction due to the increased force. Since the annular plate is connected to the detector, this action will directly drive the detector to synchronously adjust the tilt angle, ensuring that it always maintains good contact with the detection surface of the object to be measured. At the same time, the special layout design of the adjusting rod effectively extends the force arm, which means that even if the object to be measured gives a slight reverse force to the adjusting rod, it is sufficient to cause an angular change of the detector, thus greatly improving the sensitivity and accuracy of the detector's angle correction; It can remove dust or other impurities on the surface of the object to be measured before the start of detection, ensuring that the detection light is not disturbed, thereby improving the detection accuracy. Specifically, during detection, when the light emitting end of the detector gradually approaches the object to be measured, the adjusting rod first contacts the object to be measured and pushes the annular plate towards the sealing plate. This action will compress the gas in the air cavity, and the gas will be ejected from the light emitting end of the detector through the communication channel, effectively removing the dust and other impurities attached to the surface of the object to be measured; and when this process occurs, the light emitting end of the detector has not yet abutted against the object to be measured, and the dust or impurities can flow away from the gap between the detector and the object to be measured; in addition, the second elastic member can push the annular plate to reset and expand the air cavity to inhale air after the detection is completed, for use in the next detection. Description of the Drawings

[0026] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0027] Figure 2 is the internal structural schematic diagram of the embodiment of the present application.

[0028] Figure 3 mainly shows the adjustment component and the dust removal component.

[0029] Figure 4 is Figure 3 the partial enlarged view of part A in

[0030] Figure 5 is Figure 3 the partial enlarged view of part B in

[0031] Description of reference numerals: 100, object to be measured; 1, housing; 11, detection hole; 2, handle; 21, rubber sleeve; 3, detection assembly; 31, detector; 311, communication channel; 32, display screen; 33, control button; 34, battery; 4, adjustment assembly; 41, flexible connecting piece; 42, first elastic member; 43, annular plate; 44, adjusting rod; 5, dust removal assembly; 51, sleeve; 52, sealing plate; 53, second elastic member; 54, flexible pipe; 55, first one-way valve; 56, second one-way valve; 6, air cavity; 7, sealing ring; 8, universal ball head; 9, distance sensor. Detailed implementation manners

[0032] The following Figures 1 - 5 is used to further elaborate on this application in detail.

[0033] An embodiment of this application discloses a handheld spectrometer.

[0034] Referring to Figure 1 and Figure 2 , in this embodiment, the handheld spectrometer includes a housing 1, a handle 2, a detection assembly 3, an adjustment assembly 4, and a dust removal assembly 5. Specifically, the housing 1 is made of high-strength engineering plastics, has the characteristics of being lightweight and durable, and has sufficient impact resistance; a circular detection hole 11 penetrating the end face of the housing 1 is provided on one end face of the housing 1; the handle 2 is fixedly connected to the bottom of the housing 1 for easy operation by the operator, and a rubber sleeve 21 is sleeved outside the handle 2. The rubber sleeve 21 can increase the hand feeling when holding and improve the anti-slip performance, so that the detector can hold the spectrometer more stably. In other embodiments, the housing 1 can also be made of aluminum alloy material or carbon fiber material.

[0035] Referring to Figure 2 and Figure 3 , in this embodiment, the detection assembly 3 includes a detector 31, a display screen 32, a control button 33, and a battery 34; the detector 31 is specifically a cylindrical component mainly composed of a micro X-ray tube and a silicon drift detector head inside. Its working principle is to emit X-rays through the micro X-ray tube to excite the elements in the object to be measured 100, so that it releases characteristic X-ray fluorescence, and then analyze the wavelength and intensity of these fluorescences through the silicon drift detector head to determine the types and contents of the elements in the object to be measured 100; the detector 31 is arranged in the housing 1, and the light emitting end of the detector 31 passes through the detection hole 11 and extends outside the housing 1 to abut against the detection surface of the object to be measured 100 for detecting the object to be measured 100.

[0036] The display screen 32 can be selected as an LCD liquid crystal touch screen or an OLED organic light-emitting diode touch screen according to needs; the display screen 32 is fixed on one side of the housing 1 away from the detection hole 11, and the display screen 32 is electrically connected to the detector 31 through an FPC flexible cable, so as to display the parameters detected by the detector 31 for the user to view and enable the user to perform quick touch operations.

[0037] The control button 33 is electrically connected to the detector 31 to control the detector 31 to emit detection light or turn off after being turned on; the control button 33 is arranged at a position on the grip 2 that is easy to touch by the finger when holding the device, facilitating the user to operate the detector 31 to start and stop with one hand.

[0038] The battery 34 is detachably connected to the grip 2 and is used to supply power to the detector 31 and the display screen 32; specifically, the battery 34 can be selected as a large-capacity lithium-ion polymer battery, which supports a fast charging protocol and is equipped with a power indicator light to remind to replace the charge in time to avoid interrupting the work process.

[0039] Refer to Figure 3 and Figure 4 In this embodiment, the adjusting assembly 4 includes a flexible connecting piece 41, a first elastic piece 42, an annular plate 43 and three adjusting rods 44; the flexible connecting piece 41 can be selected as a rubber ring, and the flexible connecting piece 41 is arranged in the detection hole 11 and located between the detector 31 and the housing 1; one end of the flexible connecting piece 41 is fixed on the outer wall of the detector 31, and the other end is fixed on the inner wall of the housing 1 to flexibly connect the detector 31 and the housing 1.

[0040] The first elastic piece 42 is arranged between the detector 31 and the housing 1 and is located at one end of the detector 31 away from its own light-emitting end; the first elastic piece 42 can be selected as a coil spring, one end of the first elastic piece 42 is fixedly connected to the outer wall of the detector 31, and the other end is fixed on the inner wall of the housing 1; arranging the first elastic piece 42 in this way makes the light-emitting end of the detector 31 pop out along the detection hole 11 towards the outside of the housing 1 and elastically connect the outer wall of the detector 31 and the inner wall of the housing 1; it should be noted that when the detector 31 is not interfered by other external forces, the surface of its light-emitting end is parallel to the side of the housing 1 where the detection hole 11 is opened.

[0041] The annular plate 43 is made of high-strength steel and has high strength and wear resistance. The annular plate 43 is sleeved on the side of the detector 31 away from the light-emitting end and is parallel to the end face of the detector 31 for abutting against the object to be detected 100.

[0042] The adjusting rod 44 is also made of high-strength steel, having high strength and wear resistance, and its cross-section is circular; the three adjusting rods 44 are distributed parallel to each other along the circumferential direction of the detection hole 11 on the outer periphery of the detector 31 with the central axis of the detection hole 11 as the center and are slidably connected to the housing 1, and the sliding directions of the three adjusting rods 44 are all parallel to their own length directions and perpendicular to the surface of the housing 1 where the detection hole 11 is opened; the central axes of the three adjusting rods 44 are all parallel to the central axis of the detection hole 11; and the included angles between the connecting lines of the projection points of the central axes of the three adjusting rods 44 on the plane perpendicular to the central axis of the detection hole 11 are 120° pairwise, so that the distances between the three adjusting rods 44 are equal.

[0043] One end of the adjusting rod 44 is slidably abutted against one end of the annular plate 43 close to the detector 31, and the other end extends outside the housing 1 for slidably abutting against the detection surface of the object 100 to be measured; when the ends of the three adjusting rods 44 away from the annular plate 43 are all abutted against the object 100 to be measured, the annular plate 43 is parallel to the detection surface of the object 100 to be measured, and the annular plate 43 can make the surface of the detector 31 for abutting against the object 100 to be measured parallel to and abut against the detection surface of the object 100 to be measured. In this way, during the detection process, if the housing 1 is inclined with respect to the detection surface of the object 100 to be measured, the adjusting rod 44 on the side close to the inclined direction will push the annular plate 43 to deflect in the opposite direction due to the increased force, but since the annular plate 43 is connected to the detector 31, this action will directly drive the detector 31 to synchronously adjust the inclination angle to ensure that it always maintains good contact with the detection surface of the object 100 to be measured. At the same time, the special layout design of the adjusting rod 44 effectively extends the force arm, which means that even if the object 100 to be measured gives a slight reverse force to the adjusting rod 44, it is sufficient to cause an angular change of the detector 31.

[0044] Preferably, universal ball heads 8 are provided at both ends of the adjusting rod 44, and the universal ball heads 8 can reduce the frictional force when the adjusting rod 44 is slidably abutted against the annular plate 43 and the object 100 to be measured. In other embodiments, the flexible connecting member 41 can also be a silicone ring or an airbag; the first elastic member 42 can also be replaced by a plurality of ordinary springs connected between the detector 31 and the housing 1; the annular plate 43 and the adjusting rod 44 can also be made of other metal materials, such as aluminum alloy or titanium alloy; the cross-section of the adjusting rod 44 can also be rectangular or regular polygon; the number of the adjusting rods 44 can also be four, five or more, and the distances between the adjusting rods 44 can also be unequal.

[0045] Refer to Figure 3 and Figure 5, in this embodiment, the dust removal assembly 5 includes a sleeve 51, a sealing plate 52, a second elastic member 53, a flexible tube 54, a first one-way valve 55, and a second one-way valve 56; the sleeve 51 is specifically a circular cylindrical tube made of the same material as the outer shell of the detector 31. The sleeve 51 is sleeved on the outer periphery of the detector 31 and is located on the side of the annular plate 43 away from the light emitting end of the detector 31; the sealing plate 52 is also made of the same material as the outer shell of the detector 31, and its shape is similar to that of the annular plate 43. One end of the sealing plate 52 is sealingly connected to the outer wall of the detector 31, and the other end is sealingly connected to the end of the sleeve 51 away from the annular plate 43. The inner wall and the outer wall of the annular plate 43 are respectively in sealing sliding contact with the outer wall of the detector 31 and the inner wall of the sleeve 51; in this way, a closed air chamber 6 is formed between the annular plate 43, the sleeve 51, the sealing plate 52, and the detector 31.

[0046] A communication channel 311 is opened on the outer shell of the detector 31. One end of the communication channel 311 communicates with the air chamber 6 through the sealing plate 52, and the opening at the other end extends to the light emitting end of the detector 31; the second elastic member 53 is a spring. The second elastic member 53 is arranged between the sealing plate 52 and the annular plate 43 and one end abuts against the sealing plate 52, and the other end abuts against the annular plate 43 to make the annular plate 43 bounce towards the end of the sleeve 51 away from the sealing plate 52; and when the annular plate 43 bounces towards the end of the sleeve 51 away from the sealing plate 52, the end of the adjusting rod 44 away from the annular plate 43 protrudes from the light emitting end of the detector 31; when the annular plate 43 moves to the position closest to the sealing plate 52, the end of the adjusting rod 44 away from the annular plate 43 is in the same plane as the light emitting end of the detector 31. In this way, during detection, when the light emitting end of the detector 31 gradually approaches the object 100 to be measured, the adjusting rod 44 first contacts the object 100 to be measured and pushes the annular plate 43 to move towards the sealing plate 52. This action will compress the gas in the air chamber 6 and cause the gas to be ejected from the light emitting end of the detector 31 through the communication channel 311, effectively removing the dust and other impurities attached to the surface of the object 100 to be measured; and when this process occurs, the light emitting end of the detector 31 has not yet abutted against the object 100 to be measured, and the dust or impurities can flow away from the gap between the detector 31 and the object 100 to be measured; and after the detection is completed, the second elastic member 53 can push the annular plate 43 to reset and expand the air chamber 6 to inhale air for the next detection.

[0047] The flexible tube 54 can be a rubber hose. One end of the flexible tube 54 is connected to the air chamber 6 and the other end extends outside the housing 1 to communicate with the outside world. The first one-way valve 55 is arranged on the flexible tube 54 to prevent the gas in the air chamber 6 from flowing out through the flexible tube 54. The second one-way valve 56 is arranged in the communication channel 311 to prevent the external gas from entering the air chamber 6 through the communication channel 311. In this way, it effectively avoids the situation that when the annular plate 43 resets, the air chamber 6 sucks air from one side of the object to be measured 100 through the communication channel 311 and sucks up dust to contaminate the lens of the detector 31. In other embodiments, the sleeve 51 and the sealing plate 52 can be an integrally formed member. The communication channel 311 may not be provided on the outer shell of the detector 31, and the gas in the air chamber 6 can be led out to the light emitting end of the detector 31 by using a pipeline. The flexible tube 54 can also be a silica gel hose or a PVC hose.

[0048] Preferably, sealing rings 7 are provided between the inner wall of the annular plate 43 and the detector 31 and between the outer wall of the annular plate 43 and the sleeve 51. The sealing rings 7 can be O-ring seals 7 with a circular or rectangular cross-section. The setting of the sealing rings 7 effectively enhances the sealing performance between the annular plate 43 and the detector 31 and between the annular plate 43 and the sleeve 51, ensuring the stability of the internal pressure of the air chamber 6 and preventing gas leakage.

[0049] Referring to Figure 2 and Figure 3 In this embodiment, the handheld spectrometer further includes a distance sensor 9. The distance sensor 9 is arranged on the housing 1 on the side close to the light emitting end of the detector 31 for detecting the distance between the detector 31 and the object to be measured 100. The distance sensor 9 is electrically connected to the detector 31 to control the opening and closing of the detector 31. When the distance sensor 9 detects that the detector 31 and the object to be measured 100 reach a predetermined distance, the detector 31 is turned on, otherwise it is turned off. In this way, it can be automatically turned on when the detector 31 approaches the object to be measured 100, avoiding energy waste caused by premature start and the risk of accidental opening and irradiating the operator's eyes.

[0050] The implementation principle of a handheld spectrometer in an embodiment of this application is as follows: During detection, when holding the grip 2 and gradually bringing the light-emitting end of the detector 31 closer to the object to be measured 100, the adjusting rod 44 first contacts the object to be measured 100 and pushes the annular plate 43 towards the sealing plate 52. This action compresses the gas in the air chamber 6, and the gas is ejected from the light-emitting end of the detector 31 through the communication channel 311, effectively removing dust and other impurities attached to the surface of the object to be measured 100. Continuously move the detector 31 closer to the object to be measured 100 until it abuts against the detection surface of the object to be measured 100. The first elastic member 42 can provide a certain amount of buffer protection during this process to prevent the detector 31 from directly contacting the object to be measured 100 rigidly and damaging the detector 31. During the detection process, when the hand of the detector operator trembles, causing the housing 1 to tilt slightly or move away from the object to be measured 100, the detector 31 can, under the action of the first elastic member 42, ensure that the light-emitting end of the detector 31 always maintains a tight abutment with the detection surface of the object to be measured 100. The elastic connection between the detector 31 and the housing 1 enables the detector 31 to tilt relative to the housing 1 to compensate for the tilt between the housing 1 and the detection surface of the object to be measured 100. This design allows the detector 31 to make appropriate adaptive adjustments following the attitude changes of the housing 1, ensuring that even if the attitude of the housing 1 is unstable, the detector 31 can maintain an ideal angular relationship with the object to be measured 100, thereby reducing the light leakage phenomenon and ultimately improving the accuracy and reliability of the detection data of the spectrometer. And due to the arrangement of the adjusting rod 44 and the annular plate 43, if the detection surface of the housing 1 and the object to be measured 100 tilts during the detection process, the adjusting rod 44 on the side closer to the tilt direction will push the annular plate 43 to deflect in the opposite direction due to the increased force. Since the annular plate 43 is connected to the detector 31, this action will directly drive the detector 31 to synchronously adjust the tilt angle to ensure that it always maintains a good fit with the detection surface of the object to be measured 100. At the same time, the special layout design of the adjusting rod 44 effectively extends the force arm, which means that even a slight force exerted by the object to be measured 100 on the adjusting rod 44 is sufficient to cause an angular change of the detector 31, thereby greatly improving the sensitivity and accuracy of the angle correction of the detector 31.

[0051] The above are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A handheld spectrometer, characterized in that: include: A shell (1), wherein the shell (1) is provided with a handle (2); A detection component (3), the detection component (3) comprising a detector (31) and a display screen (32); the detector (31) is arranged in a housing (1), a detection hole (11) is provided on the housing (1), a light emitting end of the detector (31) extends through the detection hole (11) to the outside of the housing (1) for contacting with a detection surface of an object to be detected (100) to detect the object; the display screen (32) is electrically connected to the detector (31) to display detection parameters; An adjustment component (4), the adjustment component (4) comprising a flexible connection member (41) and a first elastic member (42); the flexible connection member (41) is arranged in the detection hole (11) to flexibly connect the detector (31) to the housing (1); the first elastic member (42) is arranged between the detector (31) and the housing (1), the first elastic member (42) being capable of causing the detector (31) to pop out of the housing (1) along the detection hole (11) and causing the outer wall of the detector (31) to be elastically connected to the inner wall of the housing (1).

2. A handheld spectrometer according to claim 1, characterized in that: The adjustment assembly (4) further comprises an annular plate (43) and at least three adjustment rods (44); the annular plate (43) is sleeved on a side of the detector (31) away from the light emitting end and is parallel to a side of the detector (31) used to abut against the object to be detected (100); the three adjustment rods (44) are distributed parallel to each other on the outer periphery of the detector (31) along the circumference of the detection hole (11) and are slidably connected to the housing (1), and the sliding directions of the three adjustment rods (44) are all parallel to their own length directions; the adjustment rods ( One end of the adjusting rod (44) is in sliding contact with one side of the annular plate (43), and the other end extends outside the housing (1) for sliding contact with the detection surface of the object to be detected (100); when the ends of the three adjusting rods (44) facing away from the annular plate (43) are in contact with the object to be detected (100), the annular plate (43) is parallel to the detection surface of the object to be detected (100), and the annular plate (43) can make a surface of the detector (31) for contacting the object to be detected (100) parallel to and contact the detection surface of the object to be detected (100).

3. A handheld spectrometer according to claim 2, characterized in that: The device also comprises a dust removal assembly (5), the dust removal assembly (5) comprising a sleeve (51), a sealing plate (52) and a second elastic member (53); the sleeve (51) is sleeved on the outer periphery of the detector (31) and is located on a side of the annular plate (43) that is away from the light emitting end of the detector (31); one end of the sealing plate (52) is sealingly connected to the outer wall of the detector (31), and the other end is sealingly connected to an end of the sleeve (51) that is away from the annular plate (43); the inner wall and the outer wall of the annular plate (43) are respectively in sealing and sliding contact with the outer wall of the detector (31) and the inner wall of the sleeve (51), so as to form a closed air cavity (6) between the annular plate (43), the sleeve (51), the sealing plate (52) and the detector (31); The detector (31) is provided with a communication channel (311), one end of the communication channel (311) is connected to the air cavity (6), and the other end is open and extends to the light emitting end of the detector (31); the second elastic member (53) is arranged between the sealing plate (52) and the annular plate (43) so that the annular plate (43) bounces up toward the sleeve (51) at one end away from the sealing plate (52); and when the annular plate (43) bounces up, the end of the adjustment rod (44) away from the annular plate (43) protrudes from the light emitting end of the detector (31); when the annular plate (43) moves to be closest to the sealing plate (52), the end of the adjustment rod (44) away from the annular plate (43) is in the same plane as the light emitting end of the detector (31).

4. A handheld spectrometer according to claim 3, characterized in that: The dust removal assembly (5) further comprises a flexible tube (54), a first one-way valve (55) and a second one-way valve (56); one end of the flexible tube (54) is in communication with the air cavity (6), and the other end extends outside the housing (1) to communicate with the outside world; the first one-way valve (55) is arranged on the flexible tube (54) to prevent the gas in the air cavity (6) from flowing out of the flexible tube (54); and the second one-way valve (56) is arranged in the communication channel (311) to prevent the outside gas from entering the air cavity (6) through the communication channel (311).

5. A handheld spectrometer according to claim 3, characterized in that: A sealing ring (7) is provided between the inner wall of the annular plate (43) and the detector (31), and between the outer wall of the annular plate (43) and the sleeve (51).

6. A handheld spectrometer according to claim 2, characterized in that: The central axis of the adjusting rod (44) is parallel to the central axis of the detection hole (11); and the angle between the lines connecting the projection points of the central axis of each of the adjusting rods (44) and the central axis of the detection hole (11) on a surface perpendicular to the central axis of the detection hole (11) is greater than 90° and less than 180°.

7. A handheld spectrometer according to claim 2, characterized in that: Universal ball heads (8) are provided at both ends of the adjustment rod (44).

8. The handheld spectrometer according to claim 1, characterized in that: The detection assembly (3) further comprises a control button (33) and a battery (34); the control button (33) is arranged on the handle (2); the control button (33) is electrically connected to the detector (31) to control the detector (31) to emit detection light, and the battery (34) is detachably connected to the handle (2) to supply power to the detector (31) and the display screen (32).

9. A handheld spectrometer according to claim 8, characterized in that: The device also comprises a distance sensor (9), the distance sensor (9) being arranged on a side of the housing (1) close to the light emitting end of the detector (31) and used for detecting the distance between the detector (31) and the object to be detected (100); the distance sensor (9) is electrically connected to the detector (31) to control the detector (31) to be turned on and off, and the detector (31) is turned on only when the distance sensor (9) detects that the detector (31) and the object to be detected (100) have reached a predetermined distance.

10. The handheld spectrometer according to claim 1, characterized in that: A rubber sleeve (21) is provided on the outer wall of the handle (2).

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