Miniature automatic trace gas detector

Abstract

The invention belongs to the related technical field of detection instruments, and provides a miniature automatic trace gas detector which comprises a camouflage shell and optical detection mechanisms arranged on two sides of an optical detection chamber in the camouflage shell, the optical detection chamber capable of automatically performing gas circulation through the circulation mechanism is arranged in the smaller camouflage shell, so that automatic collection of gas is realized, spectral absorption of the gas is detected through the optical detection mechanism, the content of trace gas in environmental gas is judged, food safety judgment is facilitated, and the detection efficiency is improved. Compared with the existing handheld gas detector, the gas detector provided by the invention can more conveniently realize hidden and automatic gas detection, is convenient to carry, and can realize rapid and effective food trace gas detection in a scene with detection hindrance.

Description

Technical Field

[0001] The present invention belongs to the technical field related to detection instruments, and in particular relates to a miniature automated trace gas detector. Background Art

[0002] Food safety is an important concern of current people's livelihood issues. For food safety testing, relevant personnel are required to go to the back kitchen of the corresponding catering point to collect food samples and environmental samples and conduct laboratory judgment to determine the food safety of the corresponding catering point. This can usually only be achieved through professional testing by authoritative organizations.

[0003] However, there are multiple problems with the way authoritative agencies carry out testing. For example, the testing is selective in terms of testing points, and cannot cover every catering outlet that users may visit for testing; and the testing is selective in terms of testing time, and a certain catering outlet can only be tested to determine whether it is qualified at a certain time. In the subsequent period, food safety cannot be guaranteed, and therefore the rights and interests of consumers cannot be reliably and safely protected. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a miniature automated trace gas detector, aiming to solve the problems raised in the background technology.

[0005] The embodiment of the present invention is implemented as follows: a miniature automated trace gas detector includes a camouflage shell and a detection component arranged in the camouflage shell;

[0006] The camouflage shell is a hollow shell and has a flat structure. Both ends of the camouflage shell are provided with assembly parts, which are used to connect and assemble the wristband;

[0007] The detection assembly includes a flat optical detection chamber with openings at both ends, and optical detection mechanisms symmetrically arranged at positions on both sides of the optical detection chamber. A circulation mechanism is rotatably provided at one opening of the optical detection chamber. When the circulation mechanism rotates, the airflow in the optical detection chamber moves along the direction of the line connecting the two openings.

[0008] The optical detection mechanism includes a detection part, and a pair of detection parts of the optical detection mechanism are respectively provided with a tunable laser generator and a laser receiver. The tunable laser generator is used to generate and output narrow-linewidth laser, and the laser receiver is used to receive the narrow-linewidth laser after partial absorption by gas molecules.

[0009] As a further solution of the present invention: the circulation mechanism specifically includes:

[0010] A circulating member having a thin-walled circular groove structure with an opening at the top is coaxially rotatably arranged at the bottom opening of the optical detection chamber. The circulating member is further provided with circulating impellers at the circumference of the lower end thereof, communicating the inside and outside of the circulating member. The circulating impellers are evenly distributed on the circumference. When the circulating member rotates, the gas in the optical detection chamber is discharged through the circulating impeller.

[0011] A circulating driving member is provided at the bottom of the circulating member. The circulating driving member is an electromagnetic structure and is magnetically matched with the circulating member. When current is passed through the circulating driving member, the circulating member rotates under the action of magnetism.

[0012] As a further solution of the present invention: further comprising a control mechanism, the control mechanism comprising a control ring and a protective member, and the top of the camouflage shell is provided with a circular opening structure;

[0013] The control ring is rotatably arranged at the edge of the circular opening structure, the protective member is a thin sheet structure, and is slidably matched with the inner wall of the optical detection chamber, and the protective member is connected to the control ring;

[0014] The inner wall of the optical inspection chamber is also provided with trigger sensors at both sides of the inspection part. The trigger sensors are electrically connected to the circulation mechanism and the inspection part. When the protective part is driven to rotate and leave the trigger sensor through the control ring, the trigger sensor triggers and controls the circulation mechanism and the inspection part to operate according to the preset operation process.

[0015] As a further solution of the present invention: the detection component further includes an air intake mechanism;

[0016] The air intake mechanism is a thin-walled structure with a bottom opening, and the bottom opening is connected to the top opening of the optical detection chamber. The air intake mechanism is also provided with air intake cavities extending at both sides, and the air intake cavities are connected to the bottom opening.

[0017] As a further solution of the present invention: the camouflage shell is further provided with a display element in the circular opening at the top, and the display element is electrically connected to the detection element for displaying and outputting gas detection results.

[0018] As a further solution of the present invention: the optical detection mechanism also includes a heat sink, which is arranged at the bottom position of the detection member corresponding to the circulating impeller. The heat sink is in a uniformly distributed thin sheet structure and is made of a good thermal conductive material.

[0019] As a further solution of the present invention: the camouflage shell further includes a collection port corresponding to the air inlet cavity and a circulation outlet corresponding to the heat sink, and both the collection port and the circulation outlet are mesh structures.

[0020] A miniature automated trace gas detector provided by an embodiment of the present invention realizes automatic collection of gas by setting an optical detection chamber that can automatically circulate gas through a circulation mechanism in a smaller camouflage shell, and detects the spectral absorption of the gas through the optical detection mechanism to determine the trace gas content in the ambient gas, thereby facilitating food safety judgment. Compared with existing handheld gas detectors, it can more conveniently perform concealed and automated gas detection, is easy to carry, and can achieve fast and effective food trace gas detection in scenarios where there are detection obstacles. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An exploded diagram of a detection component in a miniature automated trace gas detector provided by an embodiment of the present invention;

[0022] Figure 2 An overall schematic diagram of a miniature automated trace gas detector provided by an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the coordination of detection components in a miniature automated trace gas detector provided by an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the coordination between an optical detection chamber and a control mechanism in a miniature automated trace gas detector provided by an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of the coordination between the optical detection chamber and the circulation mechanism in a miniature automated trace gas detector provided by an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the coordination between a control mechanism and an air intake mechanism in a miniature automated trace gas detector provided by an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of a camouflage shell in a miniature automated trace gas detector provided in an embodiment of the present invention.

[0028] In the accompanying drawings: 1-camouflage shell, 110-collection port, 120-circulation discharge port, 130-assembly part, 2-detection component, 3-air intake mechanism, 310-air intake cavity, 4-optical detection chamber, 5-circulation mechanism, 510-circulation part, 511-circulation blade, 520-circulation drive part, 6-optical detection mechanism, 610-detection part, 620-heat dissipation part, 7-control mechanism, 710-control ring, 720-protection part. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0031] like Figures 1 to 5 As shown, a miniature automated trace gas detector provided by one embodiment of the present invention is characterized in that it includes a camouflage shell 1 and a detection component 2 arranged in the camouflage shell 1;

[0032] The camouflage shell 1 is a hollow shell and has a flat structure. The two ends of the camouflage shell 1 are provided with assembly parts 130, which are used to connect and assemble the wristband;

[0033] The detection assembly 2 includes a flat optical detection chamber 4 with openings at both ends, and optical detection mechanisms 6 symmetrically arranged on both sides of the optical detection chamber 4. A circulation mechanism 5 is rotatably provided at one opening of the optical detection chamber 4. When the circulation mechanism 5 rotates, the airflow in the optical detection chamber 4 moves along the direction of the line connecting the two openings.

[0034] The optical detection mechanism 6 includes a detection element 610, and a pair of detection elements 610 of the optical detection mechanism 6 are respectively provided with a tunable laser generator and a laser receiver. The tunable laser generator is used to generate and output narrow-linewidth laser, and the laser receiver is used to receive the narrow-linewidth laser after partial absorption by gas molecules.

[0035] In an embodiment of the present invention, a miniature automated trace gas detector is provided. By setting an optical detection chamber 4 that can automatically circulate gas through a circulation mechanism 5 in a smaller camouflage shell 1, automatic collection of gas is achieved, and the spectral absorption of the gas is detected by the optical detection mechanism 6 to determine the trace gas content in the ambient gas, thereby facilitating food safety judgment. Compared with existing handheld gas detectors, it can be more convenient to hide and realize automated gas detection, is easy to carry, and can achieve fast and effective food trace gas detection in scenarios where there are detection obstacles.

[0036] In one embodiment of the present invention, food safety is a very important livelihood issue. In the existing scenario, food safety testing can usually only be achieved through professional testing by authoritative organizations. Relevant personnel are required to go to the back kitchen of the corresponding catering point to collect food samples and environmental samples and conduct laboratory judgment to determine the food safety of the corresponding catering point. However, this approach has multiple problems. First, the detection is selective in the detection point, and it cannot cover every catering point that the user may go to for testing; second, the detection is selective in the detection time. A certain catering point can only be tested to see whether it is qualified at a certain time. In the subsequent time, food safety cannot be guaranteed. It is even possible that the dining environment of the catering point has been specially treated at the time of detection. Therefore, it is also very important for ordinary people to make independent judgments on food safety when dining. For common safety violations in the food industry, the types of gases produced in the production process or the produced food can be predicted based on a large amount of detection experience. Therefore, the judgment of food safety can be achieved through trace gas detection. In order to conduct detection for ordinary people, the concealment of the equipment is very important; implementation The camouflage shell 1 used in this example has a contoured structure. Its flat design allows for easy wearing and carrying via a strap or other structure installed via an assembly part 130, thus avoiding the significant portability issues of conventional detectors. An optical detection chamber 4 is specifically provided within the camouflage shell 1 to ensure that the optical detection mechanism 6 is not susceptible to uncertainties such as ambient light during detection. Because the detection structure provided in this embodiment is relatively small in overall volume and its power is limited, a specific isolation environment is required to ensure detection accuracy. The detection gas in the optical detection chamber 4 is collected via a circulation mechanism 5. Since the amount of food consumed by a user is limited, gas collection in a specific area is required to ensure that trace gases are primarily derived from the food itself. In this embodiment, the detection element 610 utilizes TDLAS, a method that utilizes the narrow linewidth and wavelength of a tunable diode laser, which changes with the injected current, to measure single or multiple closely spaced spectral absorption lines of a molecule, thereby determining the composition of the gas. This method has the distinct advantages of being less susceptible to the influence of other gases and having a tunable detection range.

[0037] like Figure 1 、 Figures 3 to 5 As shown, as a preferred embodiment of the present invention, the circulation mechanism 5 specifically includes:

[0038] A circulating member 510 having a thin-walled circular groove structure with an opening at the top is coaxially rotatably arranged at the bottom opening of the optical detection chamber 4. The circulating member 510 is further provided with circulating impellers 511 at the circumference of the lower end thereof, connecting the inner and outer sides of the circulating member 510. The circulating impellers 511 are evenly distributed on the circumference. When the circulating member 510 rotates, the gas in the optical detection chamber 4 is discharged through the circulating impellers 511.

[0039] A circulating driving member 520 is provided at the bottom of the circulating member 510. The circulating driving member 520 is an electromagnetic structure and is magnetically matched with the circulating member 520. When current is passed through the circulating driving member 520, the circulating member 510 rotates under the action of magnetism.

[0040] In one embodiment of the present invention, the structure of the circulation mechanism 5 is supplemented, wherein the structure of the circulation part 510 is a cover-like structure with an opening at the top, which can realize the partition of the opening on one side of the bottom of the optical detection chamber 4, and the circulation part 510 can be rotatably arranged relative to the optical detection chamber 4. Therefore, it is opened in a circumferential direction at its edge and evenly distributed circulation blades 511 are arranged. When the circulation part 510 rotates, the gas flow inside the optical detection chamber 4 can be circulated, achieving the purpose of gas collection and discharge circulation; for the realization of the rotation of the circulation part 510, the embodiment adopts an electromagnetic matching drive method, and the circulation part 510 and the circulation drive part 520 realize rotation drive through magnetic matching on the matching surface.

[0041] like Figure 1 、 Figure 4 and Figure 6 As shown, as another preferred embodiment of the present invention, it further includes a control mechanism 7, the control mechanism 7 includes a control ring 710 and a protective member 720, and the top of the camouflage shell 1 is provided with a circular opening structure;

[0042] The control ring 710 is rotatably arranged at the edge of the circular opening structure. The protective member 720 is a thin sheet structure and is slidably matched with the inner wall of the optical detection chamber 4. The protective member 720 is connected to the control ring 710.

[0043] The inner wall of the optical detection chamber 4 is also provided with trigger sensors at both sides of the detection part 610. The trigger sensors are electrically connected to the circulation mechanism 5 and the detection part 610. When the protective part 720 is driven to rotate and leave the trigger sensor through the control ring 710, the trigger sensor triggers and controls the circulation mechanism 5 and the detection part 610 to operate according to the preset operation process.

[0044] In one embodiment of the present invention, a control mechanism 7 is added. The control mechanism 7 includes two functions: one is a protective function for protecting the detection element 610; the other is a detection trigger control function for triggering the detection operation process of executing the airflow cycle; among them, as for the protective function, by using the protective member 720 to cover the detection element of the detection element 610, the time that the detection element 610 is exposed to the air can be reduced, and the oil film coverage speed of the laser emission head surface can be slowed down; as for the second function, a shortcut method for quickly triggering the detection is set, which does not require the user to go through a tedious operation process. It only needs to rotate the control ring 710 to drive the protective member 720 away from the emission end of the detection element 610, so as to quickly trigger the preset detection process and perform fully automatic trace gas detection.

[0045] like Figures 1 to 4 、 Figure 7 As shown, as another preferred embodiment of the present invention, the detection component 2 further includes an air intake mechanism 3;

[0046] The air intake mechanism 3 is a thin-walled structure with a bottom opening, and the bottom opening is connected to the top opening of the optical detection chamber 4. The air intake mechanism 3 is also provided with air intake cavities 310 extending at both sides, and the air intake cavities 310 are connected to the bottom opening.

[0047] Furthermore, the camouflage shell 1 is further provided with a display element in the circular opening at the top, and the display element is electrically connected to the detection element 610 for displaying and outputting gas detection results.

[0048] Furthermore, the optical detection mechanism 6 also includes a heat sink 620, which is arranged at the bottom position of the detection member 610 corresponding to the circulation impeller 511. The heat sink 620 has a uniformly distributed thin sheet structure and is made of a good thermal conductive material.

[0049] Furthermore, the camouflage shell 1 further includes a collection port 110 corresponding to the air inlet cavity 310 and a circulation outlet 120 corresponding to the heat sink 620 . Both the collection port 110 and the circulation outlet 120 are mesh structures.

[0050] In one embodiment of the present invention, an air intake mechanism 3 is added, and its function is to guide the flow and to partition the top opening of the optical detection chamber 4. The function of guiding the flow is achieved by cooperating with the collection port 110 set on the camouflage shell 1 to realize the collection of ambient airflow; because the detection element 610 generates a large amount of heat when detecting, the laser needs to be dissipated, and the heat sink 620 is set corresponding to the circulation impeller 511. When working, the airflow generated by the circulation impeller 511 can assist the heat dissipation effect of the heat sink 620, accelerate its heat dissipation efficiency, and discharge the airflow carrying heat through the circulation outlet 120; the function of the display element is to display the detection results and realize related controllable operation interaction and other functions.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A miniature automated trace gas detector, characterized in that: It comprises a camouflage shell (1) and a detection component (2) arranged in the camouflage shell (1); The camouflage shell (1) is a hollow shell and is provided in a flat structure. Both ends of the camouflage shell (1) are provided with assembly parts (130), and the assembly parts are used to connect and assemble the wristband; The detection assembly (2) comprises a flat optical detection chamber (4) with openings at both ends, and optical detection mechanisms (6) symmetrically arranged at positions on both sides of the optical detection chamber (4); a circulation mechanism (5) is rotatably provided at one opening of the optical detection chamber (4); when the circulation mechanism (5) rotates, the airflow in the optical detection chamber (4) moves along the direction of the line connecting the two openings; The optical detection mechanism (6) includes a detection element (610), and a pair of detection elements (610) of the optical detection mechanism (6) are respectively provided with a tunable laser generator and a laser receiver, the tunable laser generator is used to generate and output narrow linewidth laser light, and the laser receiver is used to receive the narrow linewidth laser light after partial absorption by gas molecules.

2. The miniature automated trace gas detector according to claim 1, characterized in that: The circulation mechanism (5) specifically includes: A circulation member (510) having a thin-walled circular groove structure with an opening at the top, the circulation member (510) being coaxially rotatable at the bottom opening of the optical detection chamber (4), the circulation member (510) being further provided with circulation impellers (511) communicating with the inside and outside of the circulation member (510) at the circumference of the lower end, the circulation impellers (511) being evenly distributed on the circumference, and when the circulation member (510) rotates, gas in the optical detection chamber (4) is discharged through the circulation impeller (511); A circulating driving member (520) is provided at the bottom of the circulating member (510). The circulating driving member (520) is an electromagnetic structure and is magnetically matched with the circulating member (520). When current is passed through the circulating driving member (520), the circulating member (510) rotates under the action of magnetism.

3. The miniature automated trace gas detector according to claim 2, characterized in that: It also includes a control mechanism (7), the control mechanism (7) including a control ring (710) and a protective member (720), and the top of the camouflage shell (1) is provided with a circular opening structure; The control ring (710) is rotatably arranged at the edge of the circular opening structure, the protective member (720) is a thin sheet structure and is slidably engaged with the optical detection chamber (4) on the inner wall of the optical detection chamber (4), and the protective member (720) is connected to the control ring (710); The inner wall of the optical detection chamber (4) is further provided with trigger sensors at positions on both sides of the detection member (610). The trigger sensors are electrically connected to the circulation mechanism (5) and the detection member (610). When the protection member (720) is driven to rotate and leave the trigger sensors through the control ring (710), the trigger sensors trigger and control the circulation mechanism (5) and the detection member (610) to operate according to a preset operation process.

4. The miniature automated trace gas detector according to claim 1, characterized in that: The detection component (2) further includes an air intake mechanism (3); The air intake mechanism (3) is provided with a thin-walled structure with a bottom opening, and the bottom opening is communicated with the top opening of the optical detection chamber (4). The air intake mechanism (3) is further provided with air intake cavities (310) extending at positions on both sides, and the air intake cavities (310) are communicated with the bottom opening.

5. The miniature automated trace gas detector according to claim 3, characterized in that: The camouflage shell (1) is further provided with a display element in the circular opening at the top, and the display element is electrically connected to the detection element (610) and is used to display and output gas detection results.

6. The miniature automated trace gas detector according to claim 4, characterized in that: The optical detection mechanism (6) further comprises a heat sink (620), which is arranged at the bottom of the detection member (610) corresponding to the circulating impeller (511), and the heat sink (620) is in the form of a uniformly distributed thin sheet structure and is made of a good thermal conductive material.

7. The miniature automated trace gas detector according to claim 6, characterized in that: The camouflage shell (1) further comprises a collection port (110) arranged corresponding to the air inlet cavity (310), and a circulation outlet (120) arranged corresponding to the heat sink (620); both the collection port (110) and the circulation outlet (120) are mesh structures.

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