Pulmonary function instrument quality detection device and method

Abstract

The present invention provides a pulmonary function instrument quality detection device and method, including a calibration cylinder, a drive assembly and a processor, the calibration cylinder and the drive assembly are connected, the drive assembly and the processor are electrically connected, the calibration cylinder contains a piston, the calibration cylinder is used to input gas into the pulmonary function instrument, the processor is used to control the drive assembly to drive the piston to move so that the gas enters the pulmonary function instrument, and the quality detection is performed by comparing the first parameter of the gas reduced in the calibration cylinder with the second parameter of the gas received by the pulmonary function instrument. The embodiment of the present invention can realize the quality detection of the pulmonary function instrument at a fixed time and speed through the processor, such as capacity calibration, air leakage detection, capacity linearity verification, and flow linearity verification, with higher accuracy and smaller error.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a quality detection device and method for a pulmonary function instrument. Background Art

[0002] Pulmonary function test is one of the necessary tests for respiratory diseases. Before using the spirometer for pulmonary function test, it is necessary to conduct quality tests on the spirometer, such as volume calibration, volume linearity verification, flow current verification and other quality tests, to check whether the error between the actual measured value and the theoretical value of the spirometer is within an acceptable range, so as to determine whether the pulmonary function test results are credible. If the result exceeds the allowable error range, the cause should be found in time, and if necessary, a professional should be asked to repair it.

[0003] In hospitals, calibration cylinders are generally used to perform quality inspections on spirometers. During volume calibration, the calibration cylinder is pushed and pulled at a constant speed several times to check whether the spirometer has leaks. Manual operation does not accurately control time or flow, resulting in large errors. If the required accuracy standard is not met, the operation needs to be repeated many times. Therefore, manual volume calibration of spirometers is time-consuming and laborious, and cannot achieve high accuracy and small errors. Summary of the invention

[0004] In view of this, the present invention provides a pulmonary function meter quality inspection device to realize automatic quality inspection of the pulmonary function meter, and solve the problems of poor accuracy, high number of operations, difficult verification, and long time consumption when manually calibrating the pulmonary function meter.

[0005] On the one hand, a pulmonary function meter quality inspection device is provided, comprising a calibration cylinder, a drive assembly and a processor, wherein the calibration cylinder is connected to the drive assembly, the drive assembly and the processor are electrically connected, the calibration cylinder contains a piston, the calibration cylinder is used to input gas into the pulmonary function meter, the processor is used to control the drive assembly to drive the piston to move so that gas enters the pulmonary function meter, and quality inspection is performed by comparing a first parameter of the gas reduced in the calibration cylinder with a second parameter of the gas received by the pulmonary function meter.

[0006] In one embodiment, the first parameter includes a first preset value, the second parameter includes a first measured value, the piston moves a corresponding stroke in the calibration cylinder according to the first preset value of the capacity of the gas, the capacity of the gas received by the pulmonary function meter is the first measured value, and the processor performs capacity calibration on the pulmonary function meter according to the error between the first measured value and the first preset value. If the error between the first measured value and the first preset value meets the error requirement of capacity calibration, the processor controls the drive assembly to drive the piston to move to perform flow linearity verification on the pulmonary function meter; if the error between the first measured value and the first preset value does not meet the error requirement of capacity calibration, capacity calibration is performed again after maintenance.

[0007] In one embodiment, the first parameter includes a second preset value, the second parameter includes a second measured value, the piston moves at a corresponding speed in the calibration cylinder according to the second preset value of the gas flow rate, the gas flow rate measured by the pulmonary function meter is the second measured value, and the processor performs flow linearity verification on the pulmonary function meter based on the error between the second measured value and the second preset value.

[0008] In one embodiment, the calibration cylinder includes at least two gas chamber areas, and the processor controls the drive assembly to drive the piston to move at the same or different speeds in different gas chamber areas.

[0009] In one embodiment, the first parameter includes a third preset value, the second parameter includes a third measured value, the piston moves at a uniform speed in the calibration cylinder according to the third preset value of the volume change of the gas, the volume change of the gas measured by the pulmonary function meter is the third measured value, and the processor performs capacity linearity verification on the pulmonary function meter based on the error between the third measured value and the third preset value.

[0010] In one embodiment, the calibration cylinder includes a first transmission rod and a support head, one end of the first transmission rod is connected to the piston, and the other end is connected to the support head; the driving assembly includes a first slot, the first slot is used to accommodate the support head and form a nested structure with the support head, and the driving assembly drives the first transmission rod through the nested structure to drive the piston to move in the calibration cylinder.

[0011] In one embodiment, the driving assembly includes a motor and a transmission structure, one end of the transmission structure is connected to the motor, and the other end is connected to the first slot, the motor is electrically connected to the processor, the motor is used to receive a command signal from the processor to drive the transmission structure to move, and the transmission structure drives the first transmission rod through the nested structure to drive the piston to move in the calibration cylinder.

[0012] In one embodiment, the transmission structure includes a screw rod, a second transmission rod and a transmission slider, one end of the second transmission rod is connected to the transmission slider, and the other end is connected to the first slot, the screw rod passes through the transmission slider and is electrically connected to the motor, and the motor is used to drive the screw rod to rotate, and the rotation of the screw drives the slider to move on the screw rod, thereby driving the second transmission rod to move.

[0013] In one embodiment, the driving assembly includes a second slot, the second slot is connected to the first slot via a retractable device, and the second slot is used to accommodate the support head.

[0014] On the other hand, a pulmonary function instrument quality testing method includes:

[0015] The processor controls the driving assembly to drive the piston in the calibration cylinder to move so that the gas enters the pulmonary function meter, and performs quality detection by comparing a first parameter of the gas reduced in the calibration cylinder with a second parameter of the gas received by the pulmonary function meter;

[0016] The piston moves a corresponding stroke in the calibration cylinder according to a first preset value of the gas capacity, and the gas capacity received by the pulmonary function instrument is a first measurement value;

[0017] The processor performs capacity calibration on the pulmonary function instrument according to an error between the first measured value and the first preset value;

[0018] The piston moves in the calibration cylinder at a corresponding speed according to a second preset value of the gas flow rate, and the gas flow rate measured by the pulmonary function instrument is a second measurement value;

[0019] The processor performs capacity linearity verification on the pulmonary function instrument according to an error between the second measured value and the second preset value;

[0020] The piston moves at a constant speed in the calibration cylinder according to a third preset value of the volume change of the gas, and the volume change of the gas measured by the pulmonary function instrument is a third measurement value;

[0021] The processor performs flow linearity verification on the pulmonary function meter according to an error between the third measured value and the third preset value.

[0022] The processor controls the drive assembly to drive the piston to move to calibrate the pulmonary function meter. The processor can perform quality inspections of the pulmonary function meter at a fixed time and speed, such as volume calibration, volume linearity verification, and flow linearity verification, with higher accuracy and smaller errors. It has higher accuracy and smaller errors, and there is no need to manually push and pull the piston during the pulmonary function meter volume calibration, reducing errors introduced by human factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the working principle of a pulmonary function meter quality detection device provided by an embodiment of the present invention;

[0025] Figure 2 is a schematic cross-sectional structural diagram of a pulmonary function meter quality detection device provided by an embodiment of the present invention;

[0026] Figure 3 It is a flow chart of a pulmonary function meter quality detection device for performing capacity calibration and flow linearity verification provided by an embodiment of the present invention;

[0027] Figure 4 It is a schematic cross-sectional view of another quality detection device for a pulmonary function meter provided in an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1 - calibration cylinder, 2 - piston, 3 - bracket, 4 - first transmission rod, 5 - support head, 6 - motor, 7 - coupling, 8 - screw, 9 - transmission slide block, 10 - second transmission rod, 11 - connecting rod protection device, 12 - first slot, 13 - left limit block, 14 - right limit block, 15 - second slot, 16 - drive assembly, 17 - processor, 18 - air outlet of calibration cylinder. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Please refer to Figure 1 and Figure 2, a pulmonary function meter quality inspection device is provided, comprising a calibration cylinder 1, a drive assembly 16 and a processor 17, wherein the calibration cylinder 1 is connected to the drive assembly 16, and the drive assembly 16 and the processor 17 are electrically connected, the calibration cylinder 1 contains a piston 2, the calibration cylinder 1 is used to input gas into the pulmonary function meter, the processor 17 is used to control the drive assembly 16 to drive the piston 2 to move so that the gas enters the pulmonary function meter, and the quality inspection is performed by comparing the first parameter of the gas reduced in the calibration cylinder 1 with the second parameter of the gas received by the pulmonary function meter. The quality inspection of the pulmonary function meter includes, for example, volume calibration, air leakage inspection, volume linearity verification, flow linearity verification, etc. The processor 17 includes a control module and a processing module. The user inputs various volume calibration parameters into the processor 17. The processing module of the processor 17 converts the various volume calibration parameters into command signals and sends them to the control module. The control module controls the drive component 16 to drive the piston 2 to move according to the command signals. In other embodiments, the pulmonary function meter quality detection device may also include a separate controller. The user inputs various volume calibration parameters into the processor 17. The processor 17 converts the various volume calibration parameters into command signals and sends them to the controller. The controller controls the drive component 16 to drive the piston 2 to move according to the command signals. In one embodiment, the processor 17 is a computer, which controls the operation of the drive component 16. The computer also includes a display screen, which can display the movement of the piston 2.

[0032] In one embodiment, the pulmonary function meter quality detection device is used to perform capacity calibration, the first parameter includes a first preset value, the second parameter includes a first measurement value, and the piston 2 moves a corresponding stroke in the calibration cylinder 1 according to the first preset value of the gas capacity, wherein the preset value of the gas capacity can be the volume of the calibration cylinder 1, that is, the piston 2 is fully pushed and pulled in the calibration cylinder 1, or it can be less than the volume of the calibration cylinder 1, that is, the piston 2 is not fully pushed and pulled in the calibration cylinder 1. The volume of gas received by the pulmonary function meter is the first measurement value, and the processor 17 performs capacity calibration on the pulmonary function meter according to the error between the first measurement value and the first preset value. Whether the pulmonary function meter has leakage or obstruction is determined by whether the error between the first measurement value and the first preset value meets the error requirement of capacity calibration. In one embodiment, if the error between the first measurement value and the first preset value is within the accuracy allowable range (such as relative error ≤±3%, or absolute error ≤±15mL, etc.), the error requirement of capacity calibration is met, indicating that the pulmonary function meter is normal. In one embodiment, if the operator needs to perform volume calibration on the pulmonary function meter by himself, the calibration cylinder 1 control module can be separated from the calibration cylinder 1, and the piston 2 can be manually pushed and pulled to perform volume calibration of the pulmonary function meter.

[0033] In one embodiment, if the error between the first measured value and the first preset value meets the error requirement of capacity calibration, the processor 17 controls the drive assembly 16 to drive the piston 2 to move to perform flow linearity verification on the pulmonary function meter; if the error between the first measured value and the first preset value does not meet the error requirement of capacity calibration, the cause should be found in time, and professional personnel should be asked to repair (such as calibrating the sensor) before re-calibrating the capacity.

[0034] In one embodiment, the air leakage check is performed by manual intervention, using fingers or other objects to completely cover the air outlet 18 of the calibration cylinder, and applying a small continuous positive pressure (such as 0.30 kPa). If the capacity value of the calibration cylinder 1 decreases by more than a certain value (such as 30 mL) after a certain period of time (such as 1 minute), it indicates that there is an air leakage.

[0035] In one embodiment, a pulmonary function meter quality detection device is used to perform flow linearity verification, the first parameter includes a second preset value, the second parameter includes a second measured value, the processor 17 controls the drive assembly 16 to drive the piston 2 to move at a corresponding speed in the calibration cylinder 1 according to the second preset value of the gas flow rate, the gas flow rate measured by the pulmonary function meter is the second measured value, and the processor 17 calibrates the pulmonary function meter based on the relative error or absolute error between the second measured value and the second preset value, thereby determining whether the flow of the pulmonary function meter is abnormal.

[0036] In one embodiment, the processor 17 controls the drive assembly 16 to drive the piston 2 to move at the same or different speeds in different gas chamber areas to perform flow linearity verification on the pulmonary function meter. When performing flow linearity verification on the pulmonary function meter, because the flow linearity verification of the pulmonary function meter requires calibration verification of three different flow rates of low, medium and high, and each flow rate is operated at least 3 times to ensure the correctness of the pulmonary function meter's recognition of different flow rates, in the prior art, flow linearity verification requires at least 9 times, while in this embodiment, by driving the piston 2 to move at different speeds in different gas chamber areas during a push and pull process of the piston 2, flow linearity verification at multiple speeds is completed, which can reduce the number of calibration times and improve efficiency.

[0037] For example, the calibration cylinder 1 includes a first gas chamber area, a second gas chamber area and a third gas chamber area, and the processor 17 is used to control the drive assembly 16 to drive the piston 2 to move in the first gas chamber area, the second gas chamber area and the third gas chamber area at a first speed, a second speed and a third speed respectively, wherein the first speed is less than the second speed, and the second speed is less than the third speed.

[0038] Specifically, take the calibration cylinder 1 with a capacity of 3L, and the low, medium and high flow rates to be calibrated corresponding to 0.5-2L / s, 2-5L / s, and 5-10L / s respectively as an example: the calibration cylinder 1 is evenly divided into the first gas chamber area, the second gas chamber area and the third gas chamber area, and the capacity of each gas chamber area is 1L. In different gas chamber areas, by controlling the operation of the motor 6, the drive assembly 16 runs at different speeds, and then the piston 2 is controlled to perform variable speed movement, so that the flow rate is switched from low to high or from high to low. In each part, in order to achieve the required flow rate in the standard calibration method of the spirometer. The speed of the motor 6 in the three gas chamber areas can be controlled by the processor 17 to achieve precise control of the pushing speed of the piston 2 rod. The motor 6 is controlled to rotate by the processor 17, and the flow rate change is monitored in real time on the display screen of the processor 17. If the flow rate is not within the set range, it is fed back to the control module of the processor 17 in real time, thereby accelerating or slowing down the rotation of the motor 6 and controlling the flow rate within the standard range. Specifically, taking the process from slow to fast as an example, first push in or pull out the first 1 / 3 segment within 2s, then push in or pull out the middle 1 / 3 segment within 0.5s, and finally push in or pull out the last 1 / 3 segment within 0.167s. Repeat this push-pull operation three times to complete the flow linearity verification. If the flow requirements are met in each of the three time periods, the flow linearity verification passes, otherwise it fails. This is equivalent to saving three times the time, and only three complete push-pull operations are required to achieve the flow linearity verification.

[0039] In other embodiments, the calibration cylinder 1 may be divided into two gas cavity areas, four gas cavity areas or another number of gas cavity areas, and the capacity of each gas cavity area may be the same or may not be completely the same.

[0040] The specific process of capacity calibration and flow linearity verification is as follows: Figure 3 As shown:

[0041] First, the capacity calibration is performed three times, and the control piston 2 is fully pushed and pulled three times;

[0042] Determine whether the error between the first measurement value and the first preset value is within the allowable range (the average of three errors is taken, or the three errors are required to be within the allowable range). If the error between the first measurement value and the first preset value is within the allowable range, remind the operator to determine whether flow linearity verification is required. If the operator believes that flow linearity verification is required, perform flow linearity verification. If the operator believes that flow linearity verification is not required, record the data of three capacity calibrations. If the capacity calibration result is not within the allowable range, remind the operator that the capacity calibration has failed and whether to recalibrate the capacity.

[0043] Secondly, perform three flow linearity verifications, for example, divide the calibration cylinder 1 into three gas cavity areas, each gas cavity area is 1L, and each part pushes the piston 2 at a speed of 0.5-2L / s, 2-5L / s, and 5-10L / s, and record the preset value and measurement value of each part, and do this three times. Determine whether the error between the third measurement value and the third preset value is within the allowable range. If the flow linearity verification result is not within the allowable range, remind the operator that the flow linearity verification has failed, and remind the operator to determine whether it is necessary to re-perform the flow linearity verification. If the operator thinks it is necessary, re-perform three flow linearity verifications according to the above steps. If the operator thinks it is not necessary to re-perform the flow linearity verification, record the data and end the task. If both the capacity calibration and flow linearity verification are within the allowable error range, it is prompted that the capacity calibration and flow linearity verification are successful, and pulmonary function testing can be performed.

[0044] Finally, record the data.

[0045] In one embodiment, the pulmonary function meter quality detection device is used to perform capacity linearity verification, the first parameter includes a third preset value, the second parameter includes a third measured value, the piston 2 moves at a uniform speed in the calibration cylinder 1 according to the third preset value of the volume change of the gas, the volume change of the gas measured by the pulmonary function meter is the third measured value, and the processor 17 determines whether the pulmonary function meter is normal according to whether the relative error or absolute error between the third measured value and the third preset value is within the error allowable range. In one embodiment, the calibration cylinder 1 includes at least two gas cavity areas, and the processor 17 controls the drive assembly 16 to drive the piston 2 to move at the same speed in different gas cavity areas. Specifically, the calibration cylinder 1 includes three gas cavity areas. When performing capacity linearity verification, the three gas cavity areas are uniformly accumulated and increased in volume, for example, with a volume increase of 1L, the gas is continuously injected into the pulmonary function meter, that is, 0L-1L, 1L-2L, 2L-3L, and the relative errors or absolute errors between the third measured values ​​and the third predicted values ​​of the three gas cavities are calculated respectively. If the errors are all within the capacity error allowable range, the pulmonary function meter meets the capacity linearity verification. If there is an error that does not meet the error requirements of volume linearity verification, the cause should be found in time, and professional personnel should be asked to repair it before re-verifying the volume linearity. Usually, the volume linearity verification of the spirometer is performed once every quarter.

[0046] In one embodiment, the capacity linearity verification may be performed three times after capacity calibration and before flow linearity verification. For example, the calibration cylinder 1 is evenly divided into three gas chamber areas, each gas chamber area is 1L, and each part pushes the piston 2 at a uniform speed, and the third preset value and the third measurement value of each part are recorded, and this is performed three times. It is determined whether the error between the third measurement value and the third preset value is within the allowable range. If the capacity linearity verification result is not within the allowable range, the operator is reminded that the capacity linearity verification has failed, and the operator is reminded to determine whether the capacity linearity verification needs to be repeated. If the operator deems it necessary, the capacity linearity verification is repeated three times according to the above steps. In other embodiments, the capacity linearity verification may be performed after capacity calibration and flow linearity verification, or it may be performed separately.

[0047] like Figure 1 , Figure 2 and Figure 4 As shown, in one embodiment, the calibration cylinder 1 includes a first transmission rod 4 and a support head 5, one end of the first transmission rod 4 is connected to the piston 2, and the other end is connected to the support head 5; the calibration cylinder 1 also includes a left end cover, a right end cover, and a slide cylinder, the slide cylinder is arranged between the left end cover and the right end cover, the left end cover is provided with an exhaust hole, the first transmission rod 4 is placed in the calibration cylinder 1 and passes through the right end cover, the first transmission rod 4 is connected to the piston 2 at one end close to the left end cover, and the first transmission rod 4 drives the piston 2 to move in the calibration cylinder 1. The driving component 16 includes a first card slot 12, the first card slot 12 is used to accommodate the support head 5 and form a nested structure with the support head 5, and the driving component 16 drives the first transmission rod 4 through the nested structure to drive the piston 2 to move in the calibration cylinder 1.

[0048] In one embodiment, the drive assembly 16 further includes a motor 6 and a transmission structure, one end of the transmission structure is connected to the motor 6, and the other end is connected to the first slot 12, the motor 6 is electrically connected to the processor 17, the motor 6 is used to receive the command signal of the processor 17 to drive the transmission structure to move, and the transmission structure drives the first transmission rod 4 through the nested structure to drive the piston 2 to move in the calibration cylinder 1. In other embodiments, the pulmonary function meter quality detection device includes a separate controller, the user inputs various capacity calibration and calibration parameters in the processor 17, the processor 17 converts the various capacity calibration and calibration parameters into command signals and sends them to the controller, the controller drives the transmission structure to move according to the command signal, and the transmission structure drives the first transmission rod 4 through the nested structure to drive the piston 2 to move in the calibration cylinder 1.

[0049] In one embodiment, the transmission structure includes a screw rod 8, a second transmission rod 10 and a transmission slider 9, one end of the second transmission rod 10 is connected to the transmission slider 9, and the other end is connected to the first slot 12, the screw rod 8 passes through the transmission slider 9 and is electrically connected to the motor 6, specifically, the screw rod 8 is connected to the motor 6 through the coupling 7, the motor 6 is used to drive the screw rod 8 to rotate, the screw 8 rotates to drive the slider to move on the screw rod 8, thereby driving the second transmission rod 10 to move, and the second transmission rod 10 further drives the first transmission rod 4 to drive the piston 2 to move through the nested structure formed by the first slot 12 and the support head 5. In other embodiments, the transmission function can also be realized by belts, chains, gears, etc. In one embodiment, the drive assembly 16 also includes a connecting rod protection device 11, which is arranged in the direction of travel of the transmission slider 9 and the second transmission rod 10, and is used to maintain the stability and safety of the transmission slider 9 and the second transmission rod 10 during the travel process, including but not limited to guide rails, the cooperation between the rails and the grooves, and the limit holes.

[0050] In one embodiment, the pulmonary function meter quality inspection device includes a bracket 3, which is used to support the calibration cylinder 1. The bracket 3 is provided with a movable left limit block 13 and a right limit block 14. The left limit block 13 and the right limit block 14 are respectively located on both sides of the calibration cylinder 1 and are used to fix the calibration cylinder 1. The left limit block 13 and the right limit block 14 can be flexibly moved on the bracket 3 to adapt to calibration cylinders 1 of different specifications.

[0051] In one embodiment, the driving assembly 16 includes a second slot 15, which is connected to the first slot 12 via a retractable device, and is used to accommodate the support head 5. The second slot 15 is configured to adapt to calibration cylinders 1 of different specifications. In one embodiment, the retractable device may be, for example, a spring.

[0052] A method for quality testing of a pulmonary function instrument, comprising:

[0053] The processor 17 controls the driving assembly 16 to drive the piston 2 in the calibration cylinder 1 to move so that the gas enters the pulmonary function meter, and performs quality detection by comparing the first parameter of the gas reduced in the calibration cylinder 1 with the second parameter of the gas received by the pulmonary function meter;

[0054] The piston 2 moves a corresponding stroke in the calibration cylinder 1 according to a first preset value of the gas volume, and the gas volume received by the pulmonary function instrument is a first measurement value;

[0055] The processor 17 performs capacity calibration on the pulmonary function meter according to the error between the first measured value and the first preset value;

[0056] The piston 2 moves in the calibration cylinder 1 at a corresponding speed according to a second preset value of the gas flow rate, and the gas flow rate measured by the pulmonary function instrument is a second measurement value;

[0057] The processor 17 performs capacity linearity verification on the pulmonary function meter according to the error between the second measured value and the second preset value;

[0058] The piston 2 moves at a constant speed in the calibration cylinder 1 according to a third preset value of the volume change of the gas, and the volume change of the gas measured by the pulmonary function instrument is a third measurement value;

[0059] The processor 17 performs flow linearity verification on the pulmonary function meter according to the error between the third measured value and the third preset value.

[0060] In one embodiment, the calibration cylinder 1 includes at least two gas chamber areas, and the processor 17 controls the drive assembly 16 to drive the piston 2 to move at the same or different speeds in different gas chamber areas to perform capacity linearity verification (moving at the same speed in different gas chamber areas) or flow linearity verification (moving at the same or different speeds in different gas chamber areas) of the pulmonary function meter.

[0061] In one embodiment, the pulmonary function meter quality inspection method may also include performing a leak check by manual intervention, using fingers or other objects to completely cover the calibration cylinder air outlet 18 to apply a small continuous positive pressure. If after a certain period of time, the capacity value of the calibration cylinder 1 decreases by more than a certain value, it indicates that there is a leak and a professional needs to be asked to repair it.

[0062] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A quality detection device for a pulmonary function meter, It is characterized in that It comprises a calibration cylinder, a driving assembly and a processor, wherein the calibration cylinder is connected to the driving assembly, the driving assembly is electrically connected to the processor, the calibration cylinder contains a piston, the calibration cylinder is used to input gas into the pulmonary function meter, the processor is used to control the driving assembly to drive the piston to move so that the gas enters the pulmonary function meter, and quality detection is performed by comparing a first parameter of the gas reduced in the calibration cylinder with a second parameter of the gas received by the pulmonary function meter; Among them, the first parameter includes a first preset value, the second parameter includes a first measured value, the piston moves a corresponding stroke in the calibration cylinder according to the first preset value of the gas capacity, the gas capacity received by the pulmonary function meter is the first measured value, and the processor performs capacity calibration on the pulmonary function meter according to the error between the first measured value and the first preset value; if the error between the first measured value and the first preset value meets the error requirement of capacity calibration, the processor controls the drive assembly to drive the piston to move to perform flow linearity verification on the pulmonary function meter; the first parameter also includes a second preset value, the second parameter also includes a second measured value, the piston moves at a corresponding speed in the calibration cylinder according to the second preset value of the gas flow rate, the gas flow rate measured by the pulmonary function meter is the second measured value, and the processor performs flow linearity verification on the pulmonary function meter according to the error between the second measured value and the second preset value.

2. The pulmonary function meter quality detection device according to claim 1, It is characterized in that If the error between the first measured value and the first preset value does not meet the error requirement of capacity calibration, capacity calibration is performed again after maintenance.

3. The pulmonary function meter quality detection device according to claim 1, It is characterized in that The calibration cylinder includes at least two gas chamber areas, and the processor controls the driving assembly to drive the piston to move at the same or different speeds in different gas chamber areas.

4. The pulmonary function meter quality detection device according to claim 2, It is characterized in that The first parameter includes a third preset value, the second parameter includes a third measured value, the piston moves at a uniform speed in the calibration cylinder according to the third preset value of the volume change of the gas, the volume change of the gas measured by the pulmonary function meter is the third measured value, and the processor performs capacity linearity verification on the pulmonary function meter based on the error between the third measured value and the third preset value.

5. The pulmonary function meter quality detection device according to any one of claims 1 to 4, It is characterized in that The calibration cylinder includes a first transmission rod and a support head, one end of the first transmission rod is connected to the piston, and the other end is connected to the support head; the driving assembly includes a first slot, the first slot is used to accommodate the support head and form a nested structure with the support head, and the driving assembly drives the first transmission rod through the nested structure to drive the piston to move in the calibration cylinder.

6. The pulmonary function meter quality testing device according to claim 5, It is characterized in that The driving assembly includes a motor and a transmission structure, one end of the transmission structure is connected to the motor, and the other end is connected to the first slot, the motor is electrically connected to the processor, and the motor is used to receive a command signal from the processor to drive the transmission structure to move, and the transmission structure drives the first transmission rod through the nested structure to drive the piston to move in the calibration cylinder.

7. The pulmonary function meter quality detection device according to claim 6, It is characterized in that The transmission structure includes a screw, a second transmission rod and a transmission slider, one end of the second transmission rod is connected to the transmission slider, and the other end is connected to the first slot, the screw passes through the transmission slider and is electrically connected to the motor, the motor is used to drive the screw to rotate, and the rotation of the screw drives the slider to move on the screw, thereby driving the second transmission rod to move.

8. The pulmonary function meter quality detection device according to claim 5, It is characterized in that The driving assembly includes a second card slot, the second card slot is connected to the first card slot through a retractable device, and the second card slot is used to accommodate the supporting head.

9. A method for quality testing of a pulmonary function instrument, It is characterized in that include: The processor controls the driving assembly to drive the piston in the calibration cylinder to move so that the gas enters the pulmonary function meter, and performs quality detection by comparing a first parameter of the gas reduced in the calibration cylinder with a second parameter of the gas received by the pulmonary function meter; The piston moves a corresponding stroke in the calibration cylinder according to a first preset value of the gas capacity, and the gas capacity received by the pulmonary function instrument is a first measurement value; The processor performs capacity calibration on the pulmonary function instrument according to an error between the first measured value and the first preset value; The piston moves in the calibration cylinder at a corresponding speed according to a second preset value of the gas flow rate, and the gas flow rate measured by the pulmonary function instrument is a second measurement value; The processor performs flow linearity verification on the pulmonary function instrument according to an error between the second measured value and the second preset value; The piston moves at a constant speed in the calibration cylinder according to a third preset value of the volume change of the gas, and the volume change of the gas measured by the pulmonary function instrument is a third measurement value; The processor performs capacity linearity verification on the pulmonary function meter according to an error between the third measured value and the third preset value.

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