Mechanical pump reservoir capsule calibration device and method

Abstract

This invention discloses a mechanical pump reservoir scale testing device and method. The mechanical pump reservoir scale testing device includes a reservoir to be tested, with an opening at the top and a hollow guide post at the center. A positioning plate is mounted on the upper end of the hollow guide post, and the hollow guide post and positioning plate rise and fall synchronously with the liquid level in the reservoir. The device also includes a base, a displacement display mechanism, and a water filling mechanism. A fixing fixture is provided on the base for mounting the reservoir. A sensor bracket is provided on the base, and a displacement sensor is mounted on the bracket, located directly above the reservoir. The sensor bracket has a position adjustment function, allowing the test light emitted by the displacement sensor to be positioned at the center of the positioning plate. This invention can quickly detect the reservoir scale, has a simple testing device, provides accurate test results, eliminates human subjective error, and effectively improves product yield and production efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical device detection, and particularly relates to a mechanical pump liquid storage sac scale testing device and a testing method. Background Art

[0002] The mechanical pump liquid storage sac is a precision fluid control component widely used in implantable medical devices (such as mechanical pumps). Its core function is to deliver the medicine liquid to the patient's body with extremely high precision and stability by squeezing the elasticity of the liquid storage sac. The outer wall of the liquid storage sac is usually marked with capacity scales, and medical staff or patients need to intuitively understand the remaining medicine amount according to these scales, and accordingly formulate or adjust the drug administration plan. Therefore, the accuracy of the scale directly relates to the reliability of drug administration measurement, the safety of the treatment process, and the life safety of the patient.

[0003] Currently, the testing of the scale accuracy of the mechanical pump liquid storage sac mainly relies on traditional manual detection methods. Its typical process is as follows: 1) Install the liquid storage sac on a fixture simulating a pump body, and use a precision syringe to fill it with liquid (usually water or simulated medicine liquid); 2) The operator manually operates the injection pump or flowmeter to fill the liquid storage sac with liquid at a set interval (such as every 5 μL or 10 μL). 3) For each filling interval, the operator needs to pause the operation, observe the scale value corresponding to the liquid level in the liquid storage sac with the naked eye, and compare and record it with the theoretical cumulative liquid volume filled. 4) After recording the data at multiple points throughout the process, manually calculate the error between the scale indication value and the actual liquid volume to determine whether the product is qualified.

[0004] However, the above-mentioned existing technologies have many obvious defects: Large subjective error and low precision: Completely relying on the human eye for interpretation, it is extremely vulnerable to subjective factors such as viewing angle, light, and visual fatigue, resulting in inaccurate readings, poor repeatability and consistency of test results, and it is difficult to meet the harsh requirements of high-precision medical devices for detection accuracy.

[0005] Extremely low efficiency: The entire testing process requires frequent pauses, observations, and recordings, with cumbersome operations and a long time-consuming. This has become a bottleneck process on the production line, severely restricting the production efficiency and driving up the production cost.

[0006] Low degree of automation and informatization: This method cannot achieve automatic acquisition, processing, and real-time analysis of detection data, is difficult to integrate with the manufacturing execution system (MES), is not conducive to the traceability and statistical analysis of product quality data, and does not conform to the development trend of modern intelligent manufacturing.

[0007] High labor intensity and easy to make mistakes: Long-term repetitive visual work is likely to cause fatigue to the operator, resulting in recording errors or missed inspections, and there are quality risks.

[0008] Therefore, the industry urgently needs a dedicated device and method that can automate, accurately, and efficiently perform calibration tests on mechanical pump reservoirs to overcome the many drawbacks of existing manual testing techniques and ensure the final quality of implantable medical products and patient medication safety. Summary of the Invention

[0009] In order to solve the problems in the prior art, the present invention provides a mechanical pump reservoir scale testing device and testing method.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A mechanical pump reservoir scale testing device includes a reservoir to be tested, with an opening at the top and a hollow guide column at the center of the reservoir. The hollow guide column rises and falls with the change of liquid level in the reservoir. The testing device includes a base, on which a fixing fixture is provided for installing the reservoir. After the reservoir is installed on the fixing fixture, the reservoir and the hollow guide column are in a vertical state relative to the base. A positioning plate is installed at the upper end of the hollow guide column. The positioning plate includes a positioning disc and a positioning post coaxially and fixedly connected to it. The positioning post is inserted into the hollow guide column. The hollow guide column and the positioning plate rise and fall synchronously with the liquid level in the liquid storage bladder. The base is equipped with a sensor bracket, on which a displacement sensor is mounted. The displacement sensor is located directly above the liquid reservoir. The sensor bracket has a position adjustment function, which allows the test light emitted by the displacement sensor to be positioned at the center of the positioning disc by adjusting the position of the displacement sensor. It also includes a displacement display mechanism, which is used to process and display the displacement data detected by the displacement sensor; It also includes a water filling mechanism, which is used to fill the reservoir with water.

[0011] Furthermore, the sensor bracket is an XYZ three-way adjustable bracket, including a column fixedly connected to the base plate, a Z-axis slide rail on the column, a Z-axis slider on the Z-axis slide rail that is lockably slidably connected to it; a Y-axis guide rod fixed on the Z-axis slider, a Y-axis slider on the Y-axis guide rod that is lockably slidably connected to it; and an X-axis guide rod fixed on the Y-axis slider, an X-axis slider on the X-axis guide rod that is lockably slidably connected to it. A fixed plate is fixed on the X-axis slider, and the displacement sensor is mounted on the fixed plate.

[0012] Furthermore, the Z-axis slider is slidably connected to the Z-axis slide rail, and a Z-axis locking bolt is threaded onto the Z-axis slider. The end of the Z-axis locking bolt abuts against the Z-axis slide rail, thereby realizing a lockable sliding connection between the Z-axis slider and the Z-axis slide rail. The Y-axis slider is provided with a Y-guide hole at the position corresponding to the Y-guide rod. The Y-axis slider is sleeved on the Y-guide rod through the Y-guide hole, and the Y-guide hole has a locking slot. A Y-axis locking bolt passes through the locking slot, so as to realize the lockable sliding connection between the Y-axis slider and the Y-guide rod. The X-axis slider has an X-axis guide hole at a position corresponding to the X-axis guide rod, and is fitted onto the X-axis guide rod through the X-axis guide hole; the X-axis guide hole has a locking slot, and an X-axis locking bolt passes through the locking slot, realizing a lockable sliding connection between the X-axis slider and the X-axis guide rod.

[0013] Furthermore, the fixing fixture is fixed to the base by bolts.

[0014] Furthermore, the displacement sensor is an infrared displacement sensor.

[0015] Furthermore, the water filling mechanism has a water filling control panel for controlling the amount of water filled in a single time.

[0016] Furthermore, the displacement display mechanism includes a processor and a display, with the signal output terminal of the displacement sensor connected to the signal input terminal of the processor, and the signal output terminal of the processor connected to the signal input terminal of the display.

[0017] Furthermore, the processor integrates an amplifier.

[0018] This invention also discloses a method for calibrating the liquid reservoir of a mechanical pump, based on the aforementioned mechanical pump liquid reservoir calibration testing device, comprising the following steps: Step 1: Check the testing equipment and confirm that the model of the reservoir to be tested matches the testing requirements; Step 2: Place the fixture stably on the base and secure it. Step 3: Install the reservoir to be tested onto the fixture and ensure that it is in place; Step 4: Place a positioning plate at the upper end of the hollow guide post inside the reservoir, with the positioning post of the positioning plate facing down and the positioning disk of the positioning plate facing up; adjust the position of the displacement sensor using the sensor bracket so that the test light emitted by the displacement sensor is located at the exact center of the positioning disk. Step 5: Connect the water outlet of the filling mechanism to the water inlet of the storage bladder through a pipe; Step 6: Set the test parameters on the water filling control panel of the water filling mechanism: set the single filling volume to N ml, and wait for a time T after each filling until the liquid state in the reservoir is stable; at this time, the displacement sensor measures the rising height of the positioning plate, that is, the rising height of the liquid level in the reservoir, and displays the displacement distance on the display. Then proceed with the next water filling cycle - wait for stabilization - record the displacement distance on the monitor - and start the next cycle; Repeat the above cycle until the cumulative flush volume reaches M ml, at which point the cycle stops. By comparing the height of the water-filling displacement distance between different samples under the same production parameters, the range containing the most data within the safe threshold is determined as the normal range, and data exceeding the safe threshold is considered abnormal data. Step 7: After the test is completed, turn off the water filling mechanism, displacement display mechanism and displacement sensor, and remove the liquid storage bladder.

[0019] Furthermore, in step 6, N is 20, T is 15s, M is 100, and the safety threshold is ±0.75mm.

[0020] The beneficial effects of this invention are: 1. This invention uses displacement sensing detection to replace traditional manual visual interpretation, thereby improving detection accuracy and reliability, fundamentally eliminating subjective errors of the human eye, and achieving objective, repeatable, and high-precision measurement.

[0021] 2. This invention designs a positioning plate that works in conjunction with a displacement sensor. When the liquid level in the reservoir rises, the hollow guide post and the positioning plate also rise accordingly. In other words, the rising height of the positioning plate is the rising height of the liquid level in the reservoir. The rising height of the positioning plate is accurately detected by the displacement sensor, which improves the accuracy of the test.

[0022] 3. The water filling mechanism in this invention has a water filling control panel, which can control the amount of water filled at one time, ensuring the accuracy and reliability of the data at each detection point and improving the application range.

[0023] 4. In this invention, the fixing fixture can be detachably fixed to the base, and different specifications and models of mechanical pump reservoir products can be adapted by replacing different fixing fixtures.

[0024] 5. The testing device and method provided by this invention can quickly detect the scale of the liquid reservoir. The testing device is simple, the test results are accurate, and there is no need for long-term training of testing personnel, reducing labor costs and economic costs. Furthermore, it ensures product quality, greatly improves testing accuracy and reliability, and eliminates human subjective error. Through a high degree of automation, informatization, and intelligent design, this invention can guarantee product quality, promptly detect defective products, and effectively improve product yield and production efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the testing device of the present invention; Figure 2 This is a cross-sectional view of the liquid reservoir in this invention.

[0026] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the invention. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Example 1

[0028] like Figure 1 and Figure 2 As shown, this embodiment provides a mechanical pump reservoir calibration testing device, including a reservoir 14 to be tested. The upper end of the reservoir 14 is open (the upper end of the reservoir 14, as the sample to be tested, needs to be open). A hollow guide post 141 is located at the center of the reservoir 14, and the hollow guide post 141 rises and falls with the change of liquid level inside the reservoir. The hollow guide post 141 is a conventional configuration of the reservoir 14, and its structure and principle will not be described in detail in this embodiment.

[0029] The testing device includes a base 12, on which a fixing fixture 13 is provided for installing a liquid reservoir 14. After the liquid reservoir 14 is installed on the fixing fixture, the liquid reservoir 14 and the hollow guide post 141 are in a vertical position relative to the base. In this embodiment, the fixing fixture 13 is fixed to the base 12 by bolts. Different specifications and models of mechanical pump liquid reservoir products can be adapted by replacing different fixing fixtures 13, thereby improving the application range.

[0030] During testing, a positioning piece 16 is installed on the upper end of the hollow guide post 141. The positioning piece 16 includes a positioning disc and a positioning post coaxially and fixedly connected to it. The positioning post is tightly fitted into the hollow guide post 141. After testing, the positioning piece 16 is removed from the hollow guide post 141.

[0031] A sensor bracket is provided on the base 12, and an infrared displacement sensor 8 is installed on the sensor bracket. The infrared displacement sensor 8 is located directly above the liquid storage bladder 14. The sensor bracket has a position adjustment function. By adjusting the position of the infrared displacement sensor 8, the infrared light emitted by the infrared displacement sensor 8 is located at the center of the positioning disk.

[0032] Specifically, the sensor bracket is an XYZ three-way adjustable bracket, including a column 1 fixedly connected to the base plate, a Z-axis slide rail on the column 1, and a Z-axis slider 2 that is lockably slidably connected to the Z-axis slide rail; a Y-axis guide rod 3 is fixedly fixedly fixedly fixedly on the Z-axis slider 2, and a Y-axis slider 4 that is lockably slidably connected to the Y-axis guide rod; an X-axis guide rod 5 is fixedly fixedly fixedly on the Y-axis slider 4, and an X-axis slider 6 that is lockably slidably connected to the X-axis guide rod 5. A fixing plate 7 is fixedly fixedly fixedly on the X-axis slider 6, and an infrared displacement sensor 8 is mounted on the fixing plate 7.

[0033] To achieve a lockable sliding connection between the Z-axis slider and the Z-axis slide rail, this embodiment employs the following mating structure: the Z-axis slider 2 is slidably connected to the Z-axis slide rail, and a Z-axis locking bolt is threaded onto the Z-axis slider 2, with the end of the Z-axis locking bolt abutting against the Z-axis slide rail. During adjustment, loosening the Z-axis locking bolt allows the Z-axis slider 2 to move on the Z-axis slide rail; once in position, tightening the Z-axis locking bolt achieves Z-axis positioning.

[0034] To achieve a lockable sliding connection between the Y-axis slider 4 and the Y-axis guide rod 3, the following mating structure is adopted in this embodiment: a Y-axis guide hole is provided on the Y-axis slider 4 at a position corresponding to the Y-axis guide rod 3. The Y-axis slider 4 is sleeved on the Y-axis guide rod 3 through the Y-axis guide hole, and a locking slot is provided on the Y-axis guide hole, through which a Y-axis locking bolt passes. During adjustment, loosening the Y-axis locking bolt allows the Y-axis slider 4 to move on the Y-axis guide rod 3. After moving into position, tightening the Y-axis locking bolt achieves Y-axis positioning.

[0035] To achieve a lockable sliding connection between the X-axis slider and the X-axis guide rod, this embodiment employs the following mating structure: The X-axis slider 6 has an X-axis guide hole at a position corresponding to the X-axis guide rod 5, through which it is fitted onto the X-axis guide rod 5; the X-axis guide hole has a locking slot, through which an X-axis locking bolt passes. During adjustment, loosening the X-axis locking bolt allows the X-axis slider 6 to move on the X-axis guide rod 5; after it reaches its position, tightening the X-axis locking bolt achieves X-axis positioning.

[0036] The present invention enables the adjustment and locking of the infrared displacement sensor 8 in the XYZ three directions by setting up an XYZ three-way adjustment bracket.

[0037] The testing device also includes a displacement display mechanism, which is used to process and display the displacement data detected by the infrared displacement sensor.

[0038] In this embodiment, the displacement display mechanism includes a processor 9 and a display 10. The signal output terminal of the infrared displacement sensor 8 is connected to the signal input terminal of the processor 9, and the signal output terminal of the processor 9 is connected to the signal input terminal of the display 10.

[0039] To ensure accurate data processing, processor 9 integrates an amplifier. Infrared displacement sensor 8 transmits measurement information to the amplifier, which amplifies the weak signal, improves the signal-to-noise ratio, achieves impedance matching, and conditions the signal to ensure accurate reading and processing by subsequent circuitry. The information is then converted into digital data and displayed on display 10 for accurate data recording by the user. The data processing methods of processor 9 and display 10 are existing technologies, and their specific principles will not be detailed in this embodiment.

[0040] The testing apparatus also includes a water filling mechanism 11, which is used to fill the reservoir with water. The water filling mechanism 11 has a water filling control panel for controlling the amount of water filled at one time, ensuring the accuracy and reliability of the data at each test point.

[0041] This invention uses displacement sensing detection to replace traditional manual visual interpretation, thereby improving detection accuracy and reliability, fundamentally eliminating subjective errors of the human eye, and achieving objective, repeatable, and high-precision measurement. Example 2

[0042] This embodiment discloses a method for calibrating the liquid reservoir of a mechanical pump, based on the mechanical pump liquid reservoir calibration testing device of Embodiment 1, and includes the following steps: Step 1: Check whether the test equipment (base 12, fixture 13, infrared displacement sensor 8, water filling mechanism 11, sensor bracket, etc.) is intact, prepare the necessary tools (hex wrench, bolts, etc.), and confirm that the model of the liquid reservoir to be tested matches the test requirements.

[0043] Step 2: Place the fixture 13 stably on the base and secure it firmly with bolts.

[0044] Step 3: Install the liquid reservoir 14 to be tested onto the fixture 13, and ensure that it is installed in place and without looseness.

[0045] Step 4: Place a positioning piece 16 on the upper end of the hollow guide post 141 inside the reservoir 14. The positioning post of the positioning piece 16 is inserted into the hollow guide post 141 with the positioning disc of the positioning piece 16 facing downwards. Turn on the switches of the displacement display mechanism and the infrared displacement sensor 8. Adjust the position of the infrared displacement sensor 8 through the sensor bracket so that the infrared light emitted by the infrared displacement sensor 8 is located at the center of the positioning disc (which is also the center position of the reservoir 14).

[0046] Step 5: Connect the water outlet of the water filling mechanism 11 to the water inlet of the liquid storage bladder 14 through the pipe 15, ensuring that there is no leakage at the joint.

[0047] Step 6: Open the water filling mechanism 11 and set the test parameters on the water filling control panel of the water filling mechanism 11: the single filling volume is set to 20 ml, and wait 15 seconds after each filling to ensure that the liquid state in the reservoir 14 is stable. At this time, the infrared displacement sensor 8 measures the rise height of the liquid level in the reservoir 14 (when the liquid level in the reservoir 14 rises, the hollow guide column 141 and the positioning plate 16 also rise accordingly. That is to say, the rise height of the positioning plate 16 is the rise height of the liquid level in the reservoir 14. The rise height of the positioning plate 16 is detected by the infrared displacement sensor 8) and displayed on the display 10 as the displacement distance. Then proceed with the next water filling cycle - wait for stabilization - record the displacement distance on display 10 - and start the next cycle; Repeat the above cycle until the cumulative flushing volume reaches 100 ml, at which point the cycle stops. By comparing the height of the water displacement distance between different samples under the same production parameters, the data with the most data in the range of ±0.75mm were selected as the normal range, and data with obvious deviations greater than ±0.75mm were considered abnormal data.

[0048] Step 7: After the test is completed, turn off the water filling mechanism 11, the displacement display mechanism and the infrared displacement sensor 8, and remove the liquid storage bladder 14.

[0049] The testing principle of this embodiment is as follows: Ideally, one graduation on the outer wall of the reservoir represents a 20ml volume. The test in this application observes whether the liquid level rises by one graduation after 20ml of water is added to the reservoir. If it rises exactly within or within the safe threshold range (±0.75mm), the graduation is accurate; if it exceeds the safe threshold range (±0.75mm), the graduation is inaccurate. This invention can ensure product quality and promptly detect substandard products.

[0050] The present invention can also set up a database, which contains corresponding test parameter settings for different product models, thereby enabling rapid adaptation to mechanical pump reservoir products of different specifications and models.

[0051] This invention enables rapid detection of the liquid reservoir scale. The testing device is simple, the test results are accurate, and there is no need for long-term training of testing personnel, reducing labor costs and economic expenses. It also ensures product quality, greatly improving testing accuracy and reliability, and eliminating human error. Through a high degree of automation, informatization, and intelligent design, it effectively improves product yield and production efficiency.

[0052] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

[0053] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0055] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A mechanical pump reservoir calibration testing device, comprising a reservoir to be tested, an opening at the upper end of the reservoir, and a hollow guide post at the center of the reservoir, the hollow guide post rising and falling with changes in the liquid level inside the reservoir, characterized in that, The testing device includes a base, on which a fixing fixture is provided for installing a liquid reservoir; after the liquid reservoir is installed on the fixing fixture, the liquid reservoir and the hollow guide column are in a vertical position relative to the base. A positioning plate is installed at the upper end of the hollow guide column. The positioning plate includes a positioning disc and a positioning post coaxially and fixedly connected to it. The positioning post is inserted into the hollow guide column. The hollow guide column and the positioning plate rise and fall synchronously with the liquid level in the liquid storage bladder. The base is equipped with a sensor bracket, on which a displacement sensor is mounted. The displacement sensor is located directly above the liquid reservoir. The sensor bracket has a position adjustment function, which allows the test light emitted by the displacement sensor to be positioned at the center of the positioning disc by adjusting the position of the displacement sensor. It also includes a displacement display mechanism, which is used to process and display the displacement data detected by the displacement sensor; It also includes a water filling mechanism, which is used to fill the reservoir with water.

2. The mechanical pump reservoir calibration testing device according to claim 1, characterized in that, The sensor bracket is an XYZ three-way adjustable bracket, including a column fixedly connected to the base plate, a Z-axis slide rail on the column, a Z-axis slider on the Z-axis slide rail that is lockably slidably connected to it; a Y-axis guide rod fixed on the Z-axis slider, a Y-axis slider on the Y-axis guide rod that is lockably slidably connected to it; an X-axis guide rod fixed on the Y-axis slider, an X-axis slider on the X-axis guide rod that is lockably slidably connected to it. A fixed plate is fixed on the X-axis slider, and the displacement sensor is mounted on the fixed plate.

3. The mechanical pump reservoir calibration testing device according to claim 2, characterized in that, The Z-axis slider is slidably connected to the Z-axis slide rail, and a Z-axis locking bolt is threaded onto the Z-axis slider. The end of the Z-axis locking bolt abuts against the Z-axis slide rail, thereby realizing a lockable sliding connection between the Z-axis slider and the Z-axis slide rail. The Y-axis slider is provided with a Y-guide hole at the position corresponding to the Y-guide rod. The Y-axis slider is sleeved on the Y-guide rod through the Y-guide hole, and the Y-guide hole has a locking slot. A Y-axis locking bolt passes through the locking slot, so as to realize the lockable sliding connection between the Y-axis slider and the Y-guide rod. The X-axis slider has an X-axis guide hole at a position corresponding to the X-axis guide rod, and is fitted onto the X-axis guide rod through the X-axis guide hole; the X-axis guide hole has a locking slot, and an X-axis locking bolt passes through the locking slot, realizing a lockable sliding connection between the X-axis slider and the X-axis guide rod.

4. The mechanical pump reservoir calibration testing device according to claim 1, characterized in that, The fixture is fixed to the base with bolts.

5. The mechanical pump reservoir calibration testing device according to claim 1, characterized in that, The displacement sensor is an infrared displacement sensor.

6. The mechanical pump reservoir calibration testing device according to any one of claims 1-5, characterized in that, The water filling mechanism has a water filling control panel for controlling the amount of water filled in a single time.

7. The mechanical pump reservoir calibration testing device according to claim 6, characterized in that, The displacement display mechanism includes a processor and a display. The signal output terminal of the displacement sensor is connected to the signal input terminal of the processor, and the signal output terminal of the processor is connected to the signal input terminal of the display.

8. The mechanical pump reservoir calibration testing device according to claim 7, characterized in that, The processor integrates an amplifier.

9. A method for calibrating the liquid reservoir of a mechanical pump, based on the mechanical pump liquid reservoir calibration testing device according to claim 7 or 8, characterized in that... Includes the following steps: Step 1: Check the testing equipment and confirm that the model of the reservoir to be tested matches the testing requirements; Step 2: Place the fixture stably on the base and secure it. Step 3: Install the reservoir to be tested onto the fixture and ensure that it is in place; Step 4: Place a positioning plate at the upper end of the hollow guide post inside the reservoir, with the positioning post of the positioning plate facing down and the positioning disk of the positioning plate facing up; adjust the position of the displacement sensor using the sensor bracket so that the test light emitted by the displacement sensor is located at the exact center of the positioning disk. Step 5: Connect the water outlet of the filling mechanism to the water inlet of the storage bladder through a pipe; Step 6: Set the test parameters on the water filling control panel of the water filling mechanism: set the single filling volume to N ml, and wait for a time T after each filling until the liquid state in the reservoir is stable; at this time, the displacement sensor measures the rising height of the positioning plate, that is, the rising height of the liquid level in the reservoir, and displays the displacement distance on the display. Then proceed with the next water filling cycle - wait for stabilization - record the displacement distance on the monitor - and start the next cycle; Repeat the above cycle until the cumulative flush volume reaches M ml, at which point the cycle stops. By comparing the height of the water-filling displacement distance between different samples under the same production parameters, the range containing the most data within the safe threshold is determined as the normal range, and data exceeding the safe threshold is considered abnormal data. Step 7: After the test is completed, turn off the water filling mechanism, displacement display mechanism and displacement sensor, and remove the liquid storage bladder.

10. The method for calibrating the liquid reservoir of a mechanical pump according to claim 7, characterized in that, In step 6, N is 20, T is 15s, M is 100, and the safety threshold is ±0.75mm.

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