Automatic sampling device and sampling method for posterior pharyngeal wall body fluid

Abstract

The present invention discloses an automatic sampling device for posterior pharyngeal wall body fluid, comprising a sampling chamber, an automatic sampling machine, a door access control system, a disinfection system, a temperature and humidity adjustment system, a sample processing and storage system and a control device arranged in the sampling chamber; the automatic sampling machine comprises a head limiting device, a sampling device, a display device and an emergency braking device; the head limiting device comprises a limiting mechanism for fixing the head of the sampled person, and a mouth opener for pressing the tongue of the sampled person so that the automatic sampling machine can reach the sampling point; the sampling device comprises a sampling mechanical arm, a cotton swab loading and unloading device, a range-finding radar and a miniature camera arranged at the front end of the sampling mechanical arm; the display device comprises a voice prompt module and an image display module. The present invention can realize automatic sampling, effectively reduce operating errors and missed detections, and improve the accuracy of detection.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an automatic sampling device and a sampling method for posterior pharyngeal wall body fluid. Background Art

[0002] The novel coronavirus has spread to more than 200 countries around the world. In order to achieve the goal of early detection, early isolation and early treatment, large-scale nucleic acid testing is a very important and effective means. This has been proven by the anti-epidemic practices of many countries and recognized by experts. The main samples for nucleic acid testing come from the body fluids of the posterior pharyngeal wall of the human body. At present, the sampling of such samples depends entirely on manual sampling, that is, medical staff use cotton swabs to penetrate the posterior pharyngeal wall of the sampled person to collect samples. This sampling method needs to be completed at close range, which brings the risk of infection to the sampler. The safest sampling method is for the sampled person to complete the sampling independently without contact with other people. In addition, since it is difficult to see the posterior pharyngeal wall clearly during manual sampling, it is easy to miss the test, that is, the sampled samples are not all from the posterior pharyngeal wall of the sampled person, but only from his saliva. In order to prevent missed detection or misdetection, manual sampling has very high requirements for the operation process to ensure the accuracy of nucleic acid testing. In the case of self-sampling by the sampled person, due to the lack of medical operation experience, it is easy to make operational errors and missed detection. Summary of the invention

[0003] The present invention aims to overcome the technical problems in the prior art that manual sampling has high requirements on the operating process and is prone to inaccurate detection. An auxiliary device for sampling posterior pharyngeal wall body fluids is provided, which can realize automatic sampling, effectively reduce operational errors and missed detections, and improve the accuracy of detection.

[0004] The present invention provides an automatic sampling device for posterior pharyngeal wall body fluid, comprising a sampling chamber, an automatic sampling machine arranged in the sampling chamber, a door control system, a disinfection system, a temperature and humidity adjustment system, and a sample processing and storage system;

[0005] The automatic sampler includes a head limit device, a sampling device, a display device and an emergency brake device; the head limit device includes a limit mechanism for fixing the head of the sampled person, and a mouth opener for pressing the tongue of the sampled person so that the automatic sampler can reach the sampling point; the sampling device includes a sampling mechanical arm, a cotton swab loading and unloading device, a ranging radar, and a miniature camera arranged at the front end of the sampling mechanical arm; the display device includes a voice prompt module and an image display module.

[0006] The present invention relates to an automatic sampling device for body fluids from the posterior pharyngeal wall, wherein the mouth opener comprises a guide tube and a baffle vertically arranged at the bottom end of the guide tube.

[0007] The present invention relates to an automatic sampling device for body fluids from the posterior pharyngeal wall, wherein the limiting mechanism comprises: a column, on which is provided a lower support plate with a concave arc shape for supporting the lower jaw, and an upper support plate with an upward concave arc shape for cooperating with the top of the head, the upper and lower support plates can be raised and lowered along the column, and a forehead baffle and a lower jaw baffle are respectively provided at the front ends of the upper and lower support plates; a driving component that can drive the upper support plate or the lower support plate to move downward or upward is provided on the column.

[0008] The automatic sampling device for posterior pharyngeal wall body fluid of the present invention comprises a sampling seat in the sampling chamber, and the emergency brake device comprises an emergency stop recovery button arranged on one side of the sampling seat. Whenever the person being sampled presses the emergency recovery button, the robot arm will suspend operation, and the head limit device will release the clamping and return to the initial position.

[0009] The present invention relates to an automatic sampling device for body fluids from the posterior pharyngeal wall, wherein the head limiting device includes an adjustment mechanism for adjusting the head posture of the sampled person, the adjustment mechanism including: two baffles arranged behind the left and right sides of the head, the baffles being arc-shaped plates that match the shapes of the two sides behind the head or two straight plates inclined at an angle of 120°; the baffles are fixed to the backrest of the sampling seat.

[0010] The automatic sampling device for posterior pharyngeal wall body fluid of the present invention, as a preferred embodiment, the access control system comprises:

[0011] ID card recognition module: used to identify the identity information of the sampled person;

[0012] Face recognition module: used to verify the identity information of the sampled person;

[0013] Automatic door opening and closing device: used to open and close the sampling room when the identity of the sampled person is correctly identified or when the sampled person completes sampling.

[0014] The automatic sampling device for posterior pharyngeal wall body fluid of the present invention is, as a preferred embodiment, a sample processing and storage system comprises a test tube box, a test tube rack is arranged in the test tube box, and a plurality of test tubes are arranged in the test tube rack; the test tubes are coded.

[0015] The automatic sampling device for body fluids from the posterior pharyngeal wall described in the present invention is, as a preferred embodiment, the cotton swab loading and unloading device includes a sleeve arranged at the end of a mechanical arm, a connecting rod is provided in the central hole of the sleeve, and the front end of the connecting rod has three elastic metal sheets for clamping the cotton swab; when the three elastic metal sheets extend out of the end of the sleeve, they are in an open state under the action of their own elastic force, and when the three elastic metal sheets are retracted into the end of the sleeve, they are in a contracted state under the push of the side walls of the end of the sleeve, thereby clamping the cotton swab.

[0016] The automatic sampling device for body fluids from the posterior pharyngeal wall described in the present invention, as a preferred embodiment, the cotton swab loading and unloading device may also include a driving mechanism for converting the three elastic metal sheets between an open and a closed state, and the driving mechanism may be: an electromagnet trigger switch is provided at the front end of the connecting rod, located at the center of the three elastic metal sheets, an electromagnet is provided behind the connecting rod, and when the electromagnet trigger switch is triggered, the electromagnet attracts the rear end of the connecting rod, moves the connecting rod backward, and closes the three elastic metal sheets; when the robotic arm returns to its original position after sampling is completed, the electromagnet is powered off and released from the connecting rod, the reset spring on the connecting rod resets it, and makes the three elastic metal sheets open, the cotton swab is pulled out, and placed in the sampling bottle for sealing.

[0017] The sampling robot arm is a three-axis rectangular coordinate system robot, the base of which is fixed on the top of the sampling chamber and is operated in an inverted manner. The end is equipped with a laser rangefinder radar and a micro camera. According to the mouth position of the sampled person, the robot arm is adaptively controlled to penetrate the posterior wall of the oral pharynx of the sampled person for sampling through the through hole in the middle of the special mouth opener. During sampling, the height and left and right movement position of the sampling robot arm are determined by the fixed head posture information and mouth posture information of the sampled person provided by the head limit device;

[0018] The sampling robot arm extends outward along the third axis and clamps the sampling swab through the swab loading and unloading device. At the same time, the laser ranging radar installed at the end provides real-time feedback on the position of the posterior pharyngeal wall. The miniature camera at the end of the sampling robot arm collects the end image in real time and displays it on the display screen. If the person being sampled does not want to see the image information of the collection process, the image display can be turned off. The swab at the end of the robot arm touches the posterior pharyngeal wall and rotates gently to collect the sample. After the sampling is completed, the end of the robot arm retracts and sends the swab into the test tube of the sample processing and preservation system, and the code on the test tube is recorded at the same time.

[0019] The automatic sampling device for the posterior pharyngeal wall fluid of the present invention is preferably a micro camera that can collect images inside the oral cavity, control the sampling robot arm to push the cotton swab to a suitable position for sampling, and improve the accuracy of sampling. The image display module is a liquid crystal display screen that can display information such as oral images and instructions given by the display system. The distance to the pharynx is measured by the ranging radar so that the sampling robot arm can accurately reach the sampling position of the pharyngeal wall.

[0020] Among them, the access control system is an access control system capable of identity authentication in the prior art; the temperature and humidity adjustment system is an air conditioner and a humidifier; the disinfection system can be ultraviolet disinfection, or other existing disinfection equipment can be used.

[0021] The control device is used to output control commands for the automatic sampler, output commands for the head limit device, issue commands for opening and closing the door, and issue commands for the disinfection system to perform disinfection; receive recognition information from the face recognition module, receive detection information from the pressure sensor and compare it with a threshold, and receive information collected by the ranging radar and the micro camera.

[0022] The automatic sampling method of the automatic sampling device for posterior pharyngeal wall body fluid of the present invention comprises the following steps:

[0023] S1-1. The person being sampled swipes his ID card at the door of the sampling room, and the ID card recognition module recognizes the identity information of the person being sampled;

[0024] S1-2, the face recognition module authenticates the identity of the sampled person;

[0025] S2. After the certification is passed, the automatic door opening and closing device opens the door of the sampling room;

[0026] S3-1. The display device prompts the sampled person to sit on a fixed seat;

[0027] S3-2, the display device prompts the person being sampled to put the mouth opener into his mouth;

[0028] S4, the display device prompts the user to place the head in the head limit device;

[0029] S5. The head limiting device fixes the head of the person being sampled;

[0030] S6, detecting the head pressure value and comparing it with the pressure threshold, and stopping clamping when it is greater than or equal to the threshold;

[0031] S7, stop clamping;

[0032] S8, the sampling robot arm automatically installs the cotton swab to perform sampling;

[0033] S9, the head limit device returns to the original relaxed position;

[0034] S10-1. The sampling robot arm places the cotton swab into the test tube in the test tube box, and collects the code of the test tube through the camera at the front end of the robot arm;

[0035] S10-2, the display device prompts the sampled person to complete the sampling, take out the mouth opener and put it into the designated mouth opener collection box, and the automatic door opening device opens the door of the sampling room;

[0036] S11. After the sampled person leaves the sampling room, the system returns to its initial position and the disinfection system disinfects the sampling room.

[0037] The present invention can automatically control the sampling machine to automatically sample the sampled person through the control device, and can also identify and track the head posture of the sampled person, thereby automating the sampling process and improving the accuracy of sampling. During the sampling process, no personnel participation is required, and the entire process is unmanned. After each sampling, disinfection is performed before the next person is tested. Therefore, there is no cross infection in the testing process, and the complicated labor of medical personnel is saved.

[0038] The present invention further arranges a miniature camera at the front end of the sampling device, so that the sampling robot arm and the cotton swab can simultaneously enter the oral cavity of the sampled person, and the sampling situation can be observed in real time through the display device, which can improve the accuracy of sampling.

[0039] The present invention further designs a mouth opener with a three-dimensional spatial support structure specifically according to the spatial structure of the human oral cavity. The guide tube can ensure that the upper and lower jaws cannot be closed when the person being sampled holds the sample in the mouth, while pressing the tongue so that the tongue of the person being sampled cannot interfere with the sampling process. The rear annular anti-swallowing baffle can block the lips and teeth of the person being sampled to prevent accidental swallowing.

[0040] The present invention arranges a cotton swab loading and unloading device at the front end of the sampling robot arm, so that the sampling robot arm can automatically grab and replace the cotton swab; the head can be fixed and limited by the head limiting device, and the size of the clamping force can be sensed according to the pressure sensor arranged on the upper support plate, so that the head can be sampled in a fixed state, avoiding sampling failure caused by head movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a composition diagram of an automatic sampling device for posterior pharyngeal wall body fluids according to the present invention;

[0042] Figure 2a , 2b The structure of the automatic sampling device for posterior pharyngeal wall fluid of the present invention is shown in FIG. Figure 1 ,two;

[0043] FIG2 c is a schematic diagram of a sampling chamber of an automatic sampling device for posterior pharyngeal wall body fluid according to the present invention;

[0044] Figure 3 A three-dimensional diagram of a mouth opener of an automatic sampling device for body fluids from the posterior pharyngeal wall according to the present invention;

[0045] Figure 4 A schematic diagram of a sampling device of an automatic sampling device for posterior pharyngeal wall body fluid according to the present invention;

[0046] Figure 5a , 5b They are schematic structural diagrams of a cotton swab loading and unloading device of an automatic sampling device for body fluids from the posterior pharyngeal wall according to the present invention before and after installation;

[0047] Figure 6 It is a schematic diagram of a head limiting device of an automatic sampling device for body fluids from the posterior pharyngeal wall according to the present invention;

[0048] Figure 7 This is a composition diagram of an access control system for an automatic sampling device for posterior pharyngeal wall body fluids according to the present invention;

[0049] Figure 8a , 8b A schematic diagram and a longitudinal section diagram of a test tube box of an automatic sampling device for posterior pharyngeal wall body fluid according to the present invention;

[0050] Fig. 9 The present invention discloses a flow chart of a sampling method of an automatic sampling device for posterior pharyngeal wall body fluid.

[0051] Reference numerals:

[0052] Sampling chamber 100, sampling seat 101; automatic sampling machine 200, head limiting device 201, limiting mechanism 2011, column 20111, lower support plate 20112, upper support plate 20113, forehead baffle 20114, lower jaw baffle 20115, driving component 20116, adjustment mechanism 2012, mouth opener 2013, guide tube 20131, baffle 20132; sampling device 202, sampling mechanical arm 2021, cotton swab loading and unloading device 2022, sleeve 20221, connecting rod 20222, elastic metal sheet 20223 , driving mechanism 20224, electromagnet trigger switch 202241, electromagnet 202242, return spring 202243, ranging radar 2023, micro camera 2024; display device 203; emergency braking device 204; access control system 300, ID card recognition module 310, face recognition module 320, automatic door opening and closing device 330; disinfection system 400; temperature and humidity adjustment system 500; sample processing and storage system 600, test tube box 610, test tube rack 620, test tube 630, encoding 640; control device 700. DETAILED DESCRIPTION

[0053] Embodiment 1, as Figure 1 , 2a , 2b, 2c, an automatic sampling device for posterior pharyngeal wall body fluids, comprising a sampling chamber 100, an automatic sampling machine 200 arranged in the sampling chamber 100, a door control system 300, a disinfection system 400, a temperature and humidity adjustment system 500, a sample processing and storage system 600 and a control device 700;

[0054] The sampling chamber 100 is an independent closed space with an automatic door.

[0055] The automatic sampling machine 200 includes a head limiting device 201, a sampling device 202, a display device 203 and an emergency braking device 204;

[0056] See also Figure 2a , 2b , 2c, Figure 3 , Figure 4 , Figure 5a Figure 5b , Figure 6 The head limiting device 201 is arranged in front of the sampling device 202 and is approximately located at the height of the human head. The head limiting device 201 has a limiting mechanism 2011 for fixing the head of the sampled person, an adjustment mechanism 2012 for adjusting the head posture of the sampled person, and a mouth opener 2013 for pressing the tongue of the sampled person so that the automatic sampler 200 can reach the sampling point;

[0057] The limiting mechanism 2011 includes a column 20111, which can be fixed on the wall of the sampling chamber 100 or directly stand on the ground. A lower support plate 20112 with a concave arc shape is provided on the column 20111 for supporting the lower jaw, and an upper support plate 20113 with an upward concave arc shape is used to cooperate with the top of the head. The upper and lower support plates 20112 and 20113 can be raised and lowered along the column 20111, and the distance between them can be adjusted to adapt to different heads. The upper and lower support plates 20112 and 20113 are used The upper and lower support plates 20112 and 20113 are provided with a forehead baffle 20114 and a jaw baffle 20115 at their front ends to fix the head of the sampled person. A driving component 20116 that can drive the upper and lower support plates 20112 and 20113 to move up and down is provided on the column 20111, and can be used to drive the upper and lower support plates 20112 and 20113 and fix the human head. The driving component 20116 can be a servo motor and a toothed belt transmission mechanism, which can accurately control the moving distance of the upper and lower support plates 20112 and 20113.

[0058] See also Figure 2b Among them, the adjustment mechanism 2012 for adjusting the head posture of the sampled person includes: two baffles 20121 arranged behind the left and right sides of the head, and the baffles 20121 are arc-shaped plates that match the shapes of the two sides behind the head or two straight plates inclined at an angle of 120°; the baffles 20121 are fixed on the backrest position of the sampling chair 101.

[0059] See also Figure 3 The mouth opener 2013 is used to press the tongue of the person being sampled so that the automatic sampler 200 can reach the sampling point; the mouth opener 2013 includes a guide tube 20131 and a baffle 20132 vertically arranged at the bottom end of the guide tube 20131.

[0060] like Figure 4 As shown, the sampling device 202 includes a sampling mechanical arm 2021, a cotton swab loading and unloading device 2022, a ranging radar 2023, and a micro camera 2024 arranged at the front end of the sampling mechanical arm;

[0061] See also Figure 5a , 5b The cotton swab loading and unloading device 2022 includes: a sleeve 20221 arranged at the end of the mechanical arm 2021, a connecting rod 20222 is provided in the central hole of the sleeve 20221, and the front end of the connecting rod 20222 has three elastic metal sheets 20223 for clamping the cotton swab; when the three elastic metal sheets 20223 extend out of the end of the sleeve, they are in an open state under the action of their own elastic force, and when the three elastic metal sheets 20223 are retracted into the end of the sleeve 20221, they are pushed by the side wall of the end of the sleeve 20221 and are in a contracted state, thereby clamping the cotton swab. It can also include a driving mechanism 20224 for switching the three elastic metal sheets 20223 between the open and closed states. The driving mechanism can be: an electromagnet trigger switch 202241 is provided at the front end of the connecting rod 20222 and at the center of the three elastic metal sheets 20223; an electromagnet 202242 is provided at the rear of the connecting rod 20222; and when the electromagnet trigger switch is triggered, the electromagnet 202242 attracts the rear end of the connecting rod to move the connecting rod 20222 backwards, so that the three elastic metal sheets are closed; when the robotic arm 2021 returns to its original position after sampling is completed, the electromagnet 202242 is powered off and released from the connecting rod 20222; the reset spring 202243 on the connecting rod 20222 resets it and makes the three elastic metal sheets 13 open; the cotton swab is pulled out and placed in the sampling bottle for sealing; Figure 5a , 5b The two states of starting to insert the cotton swab and clamping the cotton swab are shown respectively.

[0062] Among them, the ranging radar 2023 and the micro camera 2024 are arranged at the front end of the sampling robotic arm 2021. The ranging radar 2023 is used to collect the distance from the robotic arm to the sampling point of the posterior pharyngeal wall, and the micro camera 2024 is used to collect the image of the sampling point of the posterior pharyngeal wall and transmit it to the control device.

[0063] See also Figure 2a The display device 203 includes a voice prompt module and an image display module; a sampling seat 101 is provided in the sampling chamber 100, and the emergency brake device 204 includes an emergency stop recovery button arranged on one side of the seat 101. When the emergency stop recovery button is activated, the control device 700 issues a command to automatically release the head limit device 201, and the sampling robot arm 2021 returns to its initial position.

[0064] like Figure 7As shown, the access control system 300 includes:

[0065] ID card recognition module 310: used to identify the identity information of the sampled person;

[0066] Face recognition module 320: used to verify the identity information of the sampled person;

[0067] Automatic door opening and closing device 330: used to open and close the sampling chamber 100 when the identity of the sampled person is correctly identified or when the sampled person completes sampling.

[0068] See also Figure 1 The disinfection system 400 is a disinfection nozzle installed on the top of the sampling room, which can perform spray disinfection regularly and when people leave.

[0069] The temperature and humidity adjustment system 500 includes an air conditioner and a humidifier, which is used to adjust the temperature and humidity of the sampling room;

[0070] like Figure 8a , 8b As shown, the sample processing and preservation system 600 includes a test tube box 610 . A test tube rack 620 is arranged in the test tube box 610 . A plurality of test tubes 630 are arranged in the test tube rack 620 . The test tubes have codes 640 on them.

[0071] The control device 700 can adopt a PLC controller to output the action command of the automatic sampler 2021, output the action command of the head limit device 201, issue the command to open and close the door, and issue the command for the disinfection system 400 to disinfect; receive the recognition information of the face recognition module 320, receive the detection information of the pressure sensor and compare it with the threshold, receive the information collected by the ranging radar 2023 and the micro camera 2024, and determine the movement trajectory and movement distance.

[0072] See also Fig. 9 The method for automatic sampling of posterior pharyngeal wall body fluid automatic sampling device of the present invention comprises the following steps:

[0073] S1-1, the sampled person swipes his ID card at the door of the sampling room 100, and the ID card recognition module 310 recognizes the identity information of the sampled person;

[0074] S1-2, the face recognition module 320 performs identity authentication on the sampled person;

[0075] S2. After the authentication is passed, the control device 700 outputs a command, and the automatic door opening and closing device 330 opens the door of the sampling room;

[0076] S3-1, the control device 700 gives a command, and the display device 203 prompts the sampled person to sit on the fixed seat 101. The sampler can adjust the seat height by himself to fit the head in the head limit device 201;

[0077] S3-2, the control device 700 gives a command, and the display device 203 prompts the person being sampled to put the mouth opener 2013 into his mouth;

[0078] S4, the display device prompts the user to place the head in the head limiting device 201;

[0079] S5. The head limiting device 201 fixes the head of the person being sampled, and the adjusting mechanism 2012 adjusts the head posture of the person being sampled to facilitate the completion of sampling;

[0080] S6, judging the head pressure value, when the pressure value ≥ the threshold, proceed to the next step and stop clamping, otherwise return to S5 and continue clamping;

[0081] S7, stop clamping;

[0082] S8-1, the sampling robot arm 2021 grabs the cotton swab. When the cotton swab triggers the electromagnet switch 202241, the electromagnet 202242 clamps the cotton swab, and uses the cotton swab to break the upper cover of the test tube 630, and then throws the cotton swab into the waste cotton swab collection area;

[0083] S8-2, install the cotton swab again, and the sampling robot arm 2021 determines the movement direction and position through the information collected by the ranging radar 2023 and the micro camera 2024, and can accurately determine the sampling position for sampling;

[0084] S9. After the sampling is completed, the control device instructs the head limit device to release the head clamping to restore it to the original relaxed position;

[0085] S10-1, the sampling robot arm 2021 puts the cotton swab into the test tube 630 of the test tube box 610, and collects and records the code 640 of the test tube through the camera at the front end of the sampling robot arm 2021;

[0086] S10-2, the display device 203 prompts the sampled person to complete the sampling, take out the mouth opener 2013 and put it into the designated mouth opener collection box, and the automatic door opening device opens the door of the sampling room 100;

[0087] S11. After the sampled person leaves the sampling room 100, the system returns to the initial position, and the disinfection system 400 disinfects the sampling room 100.

[0088] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that any modification, change or equivalent that can be made without departing from the spirit and scope defined by the claims will fall within the protection scope of the present invention.

Claims

1. An automatic sampling device for posterior pharyngeal wall body fluid, characterized in that: It comprises a sampling room (100), an automatic sampling machine (200) arranged in the sampling room (100), an access control system (300), a disinfection system (400), a temperature and humidity adjustment system (500), a sample processing and storage system (600), and a control device (700); The automatic sampler (200) comprises a head limiting device (201), a sampling device (202), a display device (203) and an emergency brake device (204); the head limiting device (201) comprises a limiting mechanism (2011) for fixing the head of a person being sampled, and a mouth opener (213) for pressing the tongue of the person being sampled so that the automatic sampler (200) can reach a sampling point; the sampling device (202) comprises a sampling mechanical arm (221), a cotton swab loading and unloading device (222), a distance measuring radar (2023), and a micro camera (2024) arranged at the front end of the sampling mechanical arm (2021); and the display device (203) comprises a voice prompt module and an image display module.

2. The automatic sampling device for posterior pharyngeal wall body fluid according to claim 1, characterized in that: The mouth opener (2013) comprises a guide tube (20131) and a baffle (20132) vertically arranged at the bottom end of the guide tube (20131).

3. The automatic sampling device for posterior pharyngeal wall body fluid according to claim 2, characterized in that: The limiting mechanism (2011) comprises: a column (20111), on which a lower support plate (20112) having a downward concave arc shape for supporting the lower jaw is provided, and an upper support plate (20113) having an upward concave arc shape for cooperating with the top of the head, the upper support plate (20113) and the lower support plate (20112) can be raised and lowered along the column (20111), and a forehead baffle plate (20114) and a lower jaw baffle plate (20115) are provided at the front ends of the upper support plate (20113) and the lower support plate (20112), respectively; a driving component (20116) capable of driving the upper support plate (20113) or the lower support plate (20112) to move downward or upward is provided on the column (20111), and a pressure sensor is provided on the upper support plate (20113).

4. The automatic sampling device for posterior pharyngeal wall body fluid according to claim 3, characterized in that: A sampling seat (101) is provided in the sampling chamber (100), and the emergency braking device (204) comprises an emergency stop recovery button provided on one side of the sampling seat (101).

5. The automatic sampling device for posterior pharyngeal wall body fluid according to claim 4, characterized in that: The head limiting device (201) comprises an adjustment mechanism (2012) for adjusting the head posture of the sampled person, the adjustment mechanism (2012) comprising: two baffles arranged at the rear of the left and right sides of the head, the baffles being arc-shaped plates matching the shapes of the two sides behind the head or two straight plates inclined at an angle of 120°; the baffles are fixed structures, fixed to the backrest of the sampling chair (101).

6. An automatic sampling device for posterior pharyngeal wall body fluid according to any one of claims 1 to 5, characterized in that: The access control system (300) comprises: Identity card recognition module (310): used to identify the identity information of the sampled person; Face recognition module (320): used to verify the identity information of the sampled person; Automatic door opening and closing device (330): used to open and close the sampling room when the identity of the sampling person is correctly identified or when the sampling person completes sampling.

7. The automatic sampling device for posterior pharyngeal wall body fluid according to claim 6, characterized in that: The sample processing and preservation system (600) is a test tube box (610), wherein a test tube rack (620) is arranged in the test tube box (610), and a plurality of test tubes (630) are arranged in the test tube rack (620); and codes (640) are provided on the test tubes.

8. The automatic sampling device for posterior pharyngeal wall body fluid according to claim 7, characterized in that: The cotton swab loading and unloading device (2022) comprises a sleeve (20221) arranged at the end of a sampling mechanical arm (2021); a connecting rod (20222) is arranged in the central hole of the sleeve (20221); and the front end of the connecting rod (20222) has three elastic metal sheets (20223) for clamping the cotton swab; when the three elastic metal sheets (20223) extend out of the end of the sleeve (20221), they are in an open state under the action of their own elastic force; when the three elastic metal sheets (20223) are retracted under the push of the side wall of the end of the sleeve (20221), the cotton swab can be clamped.

9. The automatic sampling device for posterior pharyngeal wall body fluid according to claim 8, characterized in that: The cotton swab loading and unloading device (2022) further comprises a driving mechanism (20224) for switching the three elastic metal sheets (20223) between an open state and a closed state. The driving mechanism (20224) comprises: an electromagnet trigger switch (202241) is provided at the front end of the connecting rod and at the center of the three elastic metal sheets (20223); an electromagnet (202242) is provided at the rear of the connecting rod (20222); and when the electromagnet trigger switch (202241) is opened, the electromagnet (202242) is opened. 02241), the electromagnet (202242) attracts the tail end of the connecting rod (20222), causing the connecting rod (20222) to move backward, closing the three elastic metal sheets. When the robotic arm completes sampling and returns to its original position, the electromagnet is powered off and released from the connecting rod (20222). The reset spring (202243) on the connecting rod (20222) resets it and opens the three elastic metal sheets (20223). The cotton swab is pulled out and placed in the sampling bottle for sealing.

10. A sampling method for an automatic sampling device for posterior pharyngeal wall body fluid, characterized in that: It includes the following steps: S1-1, the person being sampled swipes his / her ID card on the access control system (300) at the door of the sampling room (100), and the ID card recognition module (310) recognizes the identity information of the person being sampled; S1-2, the face recognition module (320) authenticates the identity of the sampled person; S2. After the authentication is passed, the automatic door opening and closing device opens the door of the sampling room (100); S3-1, the display device (203) prompts the sampled person to sit on the fixed seat (101); S3-2, the display device (203) prompts the person being sampled to put the mouth opener (2013) into his mouth; S4, the display device (203) prompts the user to place the head in the head limiting device (201); S5, a head limiting device (201) fixes the head of the person being sampled; S6, detecting the head pressure value and comparing it with the pressure threshold, and stopping clamping when it is greater than or equal to the threshold; S7, stop clamping; S8, sampling robot arm (2021) automatically installs cotton swabs for sampling; S9, the head limiting device (201) returns to the original relaxed position; S10-1, the sampling robot arm (2021) places the cotton swab into the test tube in the test tube box (610), and collects the code of the test tube through the camera at the front end of the robot arm; S10-2, the display device (203) prompts the sampled person to complete the sampling, take out the mouth opener (2013) and put it into the designated mouth opener collection place, and the automatic door opening device opens the door of the sampling room; S11. After the sampled person leaves the sampling room, the system returns to the initial position, and the disinfection system (400) disinfects the sampling room.

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