Weight identification method and device and electronic scale

Abstract

The invention relates to a weight identification method and device and an electronic scale, and the method comprises the steps: transmitting the pressure to a side wall sealing cavity through a rigid scale plate when a user / object covers the surface of a scale body, and enabling the gas sealed in the cavity to leak outwards from the micro-pores in the side wall of the scale body; the pressure drop rate of the sealed cavity is monitored through a pressure sensor, and when the pressure drop rate exceeds a threshold value, the total area of uncovered air holes is calculated based on the fluctuation intensity of cavity pressure change and the pressure drop duration; and inputting the total area of the uncovered air holes into a pre-stored leakage area-weight compensation mapping relation to generate a weight compensation parameter so as to realize the purpose of high-precision weight identification in a non-uniform bearing scene.

Description

Technical Field

[0001] This invention relates to the field of pressure measurement technology, and in particular to a weight identification method, device and electronic scale based on air pressure decay detection, which achieves gravity compensation by calculating the leakage area of ​​micropores. Background Art

[0002] Traditional electronic scales have long faced two major technical bottlenecks: measurement errors caused by gravity distribution shifts are difficult to eliminate in non-uniform load-bearing scenarios (such as when users stand on tiptoe or on the edge); existing compensation solutions mostly rely on increasing the number of sensors or image recognition technology, which are costly, have slow response times, and pose risks of privacy breaches. While some improved solutions attempt to compensate through contact area detection, they generally neglect the intrinsic relationship between air pressure disturbances within the sealed cavity and weighing accuracy, resulting in insufficient dynamic weighing stability. There is an urgent need for a new technical solution that can guarantee measurement accuracy while also considering cost-effectiveness and user privacy. Summary of the Invention

[0003] The main objective of this invention is to provide a weight identification method, device, and electronic scale that combines air pressure attenuation detection with micropore leakage area calculation to achieve high-precision weight identification in non-uniform load-bearing scenarios.

[0004] To achieve the above objectives, the present invention provides a weight identification method, comprising the following steps:

[0005] When a user / object covers the surface of the scale, the pressure is transmitted to the sealed chamber on the side wall through the rigid scale plate, causing the gas sealed in the chamber to leak out through the micro-pores on the side wall of the scale.

[0006] The pressure drop rate of the sealed chamber is monitored by a pressure sensor. When the pressure drop rate exceeds a threshold, the total area of ​​the uncovered pores is calculated based on the fluctuation intensity of the chamber pressure change and the duration of the pressure drop.

[0007] The total area of ​​the uncovered pores is input into the pre-stored leakage area-weight compensation mapping relationship to generate weight compensation parameters.

[0008] Furthermore, prior to the step of the user / object covering the surface of the scale, the following steps are also included:

[0009] An annular sealed chamber is provided on the side wall of the scale body. The annular sealed chamber is filled with dry gas at a pressure higher than the ambient air pressure and is connected to the edge of the rigid scale plate through a gas guide groove.

[0010] Furthermore, the step of transmitting pressure to the side-wall sealed chamber through the rigid weighing plate when a user / object covers the surface of the weighing body, causing the gas sealed within the chamber to leak outward through the micro-pores in the side wall of the weighing body, includes:

[0011] When the user / object is on the surface of the scale, the rigid scale plate is compressed, and the pressure is converted into lateral compression on the annular sealed chamber through the air guide groove;

[0012] The gas inside the annular sealed chamber is forced out through the micro-pore array on the side wall by compression;

[0013] The opening direction of the micropores is parallel to the ground and is not blocked by users / objects.

[0014] Furthermore, the step of monitoring the pressure drop rate of the sealed chamber using a pressure sensor, and calculating the total area of ​​the uncovered pores based on the fluctuation intensity of the chamber pressure change and the duration of the pressure drop when the pressure drop rate exceeds a threshold, includes:

[0015] Pressure data of the chamber is collected by a pressure sensor deployed inside the annular sealed chamber;

[0016] When the pressure drop rate continuously exceeds the preset threshold and reaches the trigger duration, the trigger area is calculated.

[0017] Extract the first complete fluctuation cycle during the pressure drop phase and calculate the pressure difference between the peak and trough as the fluctuation intensity;

[0018] The time required for the line connecting the peak values ​​of the pressure fluctuations to drop from the initial value to a preset ratio is taken as the pressure drop duration.

[0019] The total area of ​​uncovered pores is calculated based on the intensity and duration of the fluctuations.

[0020] Furthermore, the leakage area-weight compensation mapping relationship is a nonlinear function model, and the correspondence between different leakage areas and weight compensation values ​​is established through calibration experiments.

[0021] Further, the step of inputting the total area of ​​the uncovered vents into a pre-stored leakage area-weight compensation mapping relationship to generate weight compensation parameters includes:

[0022] Invoke the pre-stored leakage area-weight compensation mapping relationship;

[0023] Match the total area of ​​uncovered pores with the corresponding weight compensation parameters;

[0024] Superimpose weight compensation parameters with the original parameters of the gravity sensor;

[0025] The corrected gravity sensor reading is output as the final weight.

[0026] Furthermore, after the step of superimposing the weight compensation value with the original data from the gravity sensor, the following steps are also included:

[0027] Monitor the fluctuation status of pressure data in the sealed chamber;

[0028] When the fluctuation range remains within the set threshold range for a stable period of time, the compensation value is locked and the final weight is output.

[0029] If the fluctuation exceeds the set threshold range, the total area of ​​uncovered pores will be recalculated based on the current pressure data and the compensation value will be updated.

[0030] The present invention also provides a weight recognition device, comprising:

[0031] The physical unit is used to transmit pressure to the side wall sealed chamber through the rigid weighing plate when a user / object covers the surface of the weighing body, so that the gas sealed in the chamber leaks out from the micro-pores on the side wall of the weighing body.

[0032] The calculation unit is used to monitor the pressure drop rate of the sealed chamber through a pressure sensor. When the pressure drop rate exceeds a threshold, it calculates the total area of ​​the uncovered pores based on the fluctuation intensity of the chamber pressure change and the duration of the pressure drop.

[0033] The detection unit is used to input the total area of ​​the uncovered pores into a pre-stored leakage area-weight compensation mapping relationship to generate weight compensation parameters.

[0034] The present invention also provides an electronic scale, comprising:

[0035] A rigid weighing plate with no perforations, made of tempered glass or metal alloy;

[0036] An annular sealed chamber is located inside the side wall of the scale body;

[0037] An air guide channel connects the edge of the weighing plate to the chamber.

[0038] A micropore array manufactured using MEMS technology is distributed on the outer sidewall of the cavity.

[0039] MEMS pressure sensors are deployed at the center of the chamber wall;

[0040] For performing the processing apparatus according to any one of claims 1-7.

[0041] The air guide groove is inclined at an angle of 30°-45° to the horizontal plane; the inner wall of the air guide groove is provided with a spiral guide pattern.

[0042] The weight recognition method, device, and electronic scale provided by this invention have the following beneficial effects: This invention achieves multiple technological breakthroughs by introducing the principle of air pressure detection into the field of weight recognition. It utilizes the gas leakage effect of a micro-pore array to establish a precise mapping relationship between pressure, area, and weight, effectively overcoming the dependence of traditional methods on the uniformity of gravity distribution; a dynamic compensation algorithm designed based on pressure fluctuation characteristics improves measurement stability under non-standard standing postures; the overall structure of this invention adopts a modular design, significantly reducing hardware costs while ensuring accuracy; in addition, a purely physical detection mechanism is set up to avoid privacy concerns arising from image acquisition. Attached Figure Description

[0043] Figure 1 This is a flowchart illustrating a weight recognition method according to an embodiment of the present invention;

[0044] Figure 2 This is a structural block diagram of a weight recognition device according to an embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram of the structure of an electronic scale according to an embodiment of the present invention.

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0048] Reference Figure 1 The diagram below illustrates a weight recognition method proposed in this invention, comprising the following steps:

[0049] S1, When a user / object covers the surface of the scale body, the pressure is transmitted to the side wall sealed chamber through the rigid scale plate, causing the gas sealed in the chamber to leak outward from the micro-pores on the side wall of the scale body;

[0050] S2, monitors the pressure drop rate of the sealed chamber through a pressure sensor. When the pressure drop rate exceeds the threshold, calculates the total area of ​​the uncovered pores based on the fluctuation intensity of the chamber pressure change and the duration of the pressure drop.

[0051] S3, input the total area of ​​the uncovered pores into the pre-stored leakage area-weight compensation mapping relationship to generate weight compensation parameters.

[0052] In one embodiment, prior to the step of the user / object covering the surface of the scale, the method further includes:

[0053] An annular sealed chamber is provided on the side wall of the scale body. The annular sealed chamber is filled with dry gas at a pressure higher than the ambient air pressure and is connected to the edge of the rigid scale plate through a gas guide groove.

[0054] In practical implementation, before the weight recognition process begins, a ring-shaped sealed chamber structure needs to be pre-installed on the side wall of the scale body. The ring-shaped chamber is filled with dry air or nitrogen at a pressure 10%-15% higher than the ambient air pressure, and connected to the edge of the rigid scale plate through an air guide groove at a specific angle. The ring structure optimizes pressure distribution, efficiently converting vertical pressure into lateral compressive force, with the conversion efficiency satisfying the relationship: F... 侧向 =F 垂直 •cosθ, where θ is the inclination angle of the air guide groove (preferably 35°±5°), and the initial pressurization design of the chamber (P0=1.10~1.15P). 环境 This improved the sensitivity of the pressure drop signal for micropore leakage, while controlling the volume between 20-50 cm³. 3 The design balances response speed and stability within a specific range. The inner wall of the air guide groove features spiral flow-guiding patterns; the depth-to-pitch ratio (d / p = 0.15) reduces the Reynolds number of the airflow, effectively suppressing turbulence interference. This structure fundamentally solves the error inherent in traditional electronic scales when weighing at the edge. During manufacturing, a micro-pore array is fabricated using MEMS photolithography, with pore diameter tolerance controlled within ±0.02mm, and a hydrophobic coating with a contact angle >120° is applied to prevent liquid blockage.

[0055] In one embodiment, for step S1,

[0056] When a user / object covers the surface of the scale, the pressure is transmitted through the rigid scale plate to the sealed chamber in the side wall, causing the gas sealed in the chamber to leak outward from the micropores in the side wall of the scale. This includes the following steps:

[0057] When the user / object is on the surface of the scale, the rigid scale plate is compressed, and the pressure is converted into lateral compression on the annular sealed chamber through the air guide groove;

[0058] The gas inside the annular sealed chamber is forced out through the micro-pore array on the side wall by compression;

[0059] The opening direction of the micropores is parallel to the ground and is not blocked by users / objects.

[0060] In practice, when the user stands or an object is placed on the scale surface, the rigid scale plate (tempered glass / metal alloy) bears vertical pressure. This pressure is converted into lateral compression of the annular sealed chamber through a 35° inclined air guide groove, and the compression strength satisfies the mechanical relationship:

[0061] F 侧压 =F 垂直 sin(55°±5°)

[0062] (Due to the air guide groove inclination angle θ = 35°, the pressure transmission angle is 90° - θ), which efficiently converts vertical pressure into horizontal extrusion force, improving conversion efficiency compared to traditional vertical chambers. The extrusion forces the pressurized gas inside the chamber to be ejected at high speed from the micro-pore array on the side wall, forming a directional gas jet. The micro-pore openings are strictly parallel to the ground, ensuring that the user's feet or the bottom of objects cannot physically cover the pores and guaranteeing jet stability. The airflow parallel to the ground is constrained by the Bernoulli effect, and the jet velocity v satisfies:

[0063]

[0064] ρ is the air density (1.2 kg / m³). 3 Under pressure differential, the jet velocity reaches 15-20 m / s, forming a stable and measurable pressure drop. The gas leakage process triggers adiabatic expansion within the sealed chamber.

[0065]

[0066] S represents the total area of ​​the uncovered micropores, and k is the conductivity coefficient. This differential equation establishes a direct relationship between the leakage area S and the pressure drop rate dP / dt. The micropore array is manufactured using MEMS photolithography, with a pore diameter tolerance of ≤±0.02mm. The inner walls of the pores are coated with a perfluorosilane hydrophobic coating, with a contact angle of 125°±3°, completely preventing clogging by sweat / water. This step, through the synergistic effect of mechanical conduction optimization and fluid dynamics design, accurately converts the user's gravity into a quantifiable gas leakage effect, providing a high signal-to-noise ratio signal source for the pressure monitoring step S2.

[0067] In one embodiment, for step S2,

[0068] The steps include monitoring the pressure drop rate of the sealed chamber using a pressure sensor, and calculating the total area of ​​the uncovered pores based on the fluctuation intensity of the chamber pressure change and the duration of the pressure drop when the pressure drop rate exceeds a threshold.

[0069] Pressure data of the chamber is collected by a pressure sensor deployed inside the annular sealed chamber;

[0070] When the pressure drop rate continuously exceeds the preset threshold and reaches the trigger duration, the trigger area is calculated.

[0071] Extract the first complete fluctuation cycle during the pressure drop phase and calculate the pressure difference between the peak and trough as the fluctuation intensity;

[0072] The time required for the line connecting the peak values ​​of the pressure fluctuations to drop from the initial value to a preset ratio is taken as the pressure drop duration.

[0073] The total area of ​​uncovered pores is calculated based on the intensity and duration of the fluctuations.

[0074] In practical implementation, when a user or object applies pressure to the surface of the scale, a high-precision MEMS pressure sensor installed in the annular sealed chamber monitors the air pressure change in real time at a sampling frequency of 200Hz. The system employs an intelligent triggering mechanism; when a pressure drop rate is detected to continuously exceed 5% / s and remain for 100 milliseconds, the area calculation process is automatically initiated. This triggering threshold was optimized and determined through multiple human weighing experiments, effectively avoiding false triggering caused by slight user movement or environmental interference. During the pressure drop phase, the first complete fluctuation cycle is captured, and the pressure difference ΔP between the peak and trough values ​​is measured as a fluctuation intensity index, which directly reflects the kinetic energy characteristics of gas leakage. The envelope of the pressure fluctuation is constructed, and the time constant required for it to decay from the initial amplitude to 36.8% is recorded. This specific percentage value of 36.8% originates from fluid dynamics characteristics and accurately characterizes the system's inertia. Based on the experimentally calibrated nonlinear model, the equivalent total area of ​​the uncovered micropores is calculated. Throughout the process, the MEMS pressure sensor has a dynamic range of 150 kPa and excellent temperature stability (drift less than ±0.05% FS / ℃), ensuring reliable measurement data can be obtained under different environmental conditions.

[0075] In one embodiment, for step S3,

[0076] The step of inputting the total area of ​​the uncovered vents into a pre-stored leakage area-weight compensation mapping relationship to generate weight compensation parameters includes:

[0077] Invoke the pre-stored leakage area-weight compensation mapping relationship;

[0078] Match the total area of ​​uncovered pores with the corresponding weight compensation parameters;

[0079] Superimpose weight compensation parameters with the original parameters of the gravity sensor;

[0080] The corrected gravity sensor reading is output as the final weight.

[0081] In practical implementation, the total area S of uncovered pores calculated in step S2 is input into a pre-stored database of leakage area-weight compensation mapping relationships. This database, established through numerous calibration experiments, stores weight compensation values ​​ΔW corresponding to different leakage areas. Its nonlinear mapping relationship can be expressed as ΔW = f(S), where f(S) is a compensation function fitted by a polynomial. After obtaining the current leakage area S, an interpolation algorithm is used to match precise weight compensation parameters in the database. Subsequently, the compensation calculation is performed in real-time in the digital signal processor: the raw readings collected by the gravity sensor are weighted and superimposed with the compensation values ​​to generate the final corrected weight value. The entire compensation process is completed within 20ms, ensuring real-time performance. The compensation database is calibrated and updated every six months using standard weights to ensure long-term stability. The system ultimately outputs the corrected weight value on an LCD display and has an automatic locking function; the display result is locked when the fluctuation is less than 0.1% for three consecutive samplings.

[0082] In one embodiment, after the step of superimposing the weight compensation value with the original data from the gravity sensor, the method further includes:

[0083] Monitor the fluctuation status of pressure data in the sealed chamber;

[0084] When the fluctuation range remains within the set threshold range for a stable period of time, the compensation value is locked and the final weight is output.

[0085] If the fluctuation exceeds the set threshold range, the total area of ​​uncovered pores will be recalculated based on the current pressure data and the compensation value will be updated.

[0086] In practical implementation, after weight compensation, an intelligent dynamic calibration mechanism ensures the stability of the final output result. The system continuously monitors the pressure fluctuations in the sealed chamber, employing a sliding window algorithm to analyze the pressure fluctuation amplitude in real time. The window width is set to 500ms to cover typical human physiological micro-movement cycles. When the pressure fluctuation amplitude remains within the ±0.5% threshold range for 30 seconds (this threshold was determined statistically through multiple human weighing experiments), the weighing state is considered stable. The current compensation value is automatically locked, and the final weight value is output after digital filtering. The display refresh rate is reduced to 0.2Hz to avoid numerical jumps. If the pressure fluctuation amplitude exceeds the threshold range, a real-time recalculation process is immediately triggered: based on the latest 50 sets of collected pressure data (sampling interval 10ms), the calculation of the total area of ​​the uncovered pores is re-executed, and the compensation parameters are updated. This dynamic calibration mechanism allows the electronic scale to automatically recalibrate when the user adjusts their standing posture. Dual judgment conditions are set: both the fluctuation amplitude threshold and the duration threshold must be met simultaneously, effectively avoiding false triggering due to momentary interference. The entire calibration process is completed in the embedded processor, with response latency controlled within 80ms, ensuring a smooth user experience. Before the final weight value is output, it needs to go through three levels of digital filtering, including moving average filtering (window width 5), median filtering and Kalman filtering, to further eliminate random noise interference.

[0087] Reference Figure 2 Here is a structural block diagram of a weight recognition device according to an embodiment of the present invention, comprising:

[0088] The physical unit is used to transmit pressure to the side wall sealed chamber through the rigid weighing plate when a user / object covers the surface of the weighing body, so that the gas sealed in the chamber leaks out from the micro-pores on the side wall of the weighing body.

[0089] The calculation unit is used to monitor the pressure drop rate of the sealed chamber through a pressure sensor. When the pressure drop rate exceeds a threshold, it calculates the total area of ​​the uncovered pores based on the fluctuation intensity of the chamber pressure change and the duration of the pressure drop.

[0090] The detection unit is used to input the total area of ​​the uncovered pores into a pre-stored leakage area-weight compensation mapping relationship to generate weight compensation parameters.

[0091] Reference Figure 3 Here is a structural diagram of an electronic scale according to an embodiment of the present invention, comprising:

[0092] A rigid weighing plate with no perforations, made of tempered glass or metal alloy;

[0093] An annular sealed chamber is located inside the side wall of the scale body;

[0094] An air guide channel connects the edge of the weighing plate to the chamber.

[0095] A micropore array manufactured using MEMS technology is distributed on the outer sidewall of the cavity.

[0096] MEMS pressure sensors are deployed at the center of the chamber wall;

[0097] For performing the processing apparatus according to any one of claims 1-7.

[0098] For the specific implementation of each unit in the above device example, please refer to the method embodiments described above, and will not be repeated here.

[0099] In summary, when a user / object covers the surface of the scale, pressure is transmitted to the sealed chamber on the side wall through the rigid scale plate, causing the gas sealed in the chamber to leak outward through the micro-pores on the side wall of the scale. The pressure drop rate of the sealed chamber is monitored by a pressure sensor. When the pressure drop rate exceeds a threshold, the total area of ​​the uncovered pores is calculated based on the fluctuation intensity of the chamber pressure change and the duration of the pressure drop. The total area of ​​the uncovered pores is input into a pre-stored leakage area-weight compensation mapping relationship to generate weight compensation parameters, thereby achieving high-precision weight recognition in non-uniform load-bearing scenarios.

[0100] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, apparatus, article, or method. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, apparatus, article, or method that includes that element.

[0101] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A weight recognition method, characterized in that, Includes the following steps: When a user / object covers the surface of the scale, the pressure is transmitted to the sealed chamber on the side wall through the rigid scale plate, causing the gas sealed in the chamber to leak out through the micro-pores on the side wall of the scale. The pressure drop rate of the sealed chamber is monitored by a pressure sensor. When the pressure drop rate exceeds a threshold, the total area of ​​the uncovered pores is calculated based on the fluctuation intensity of the chamber pressure change and the duration of the pressure drop. The total area of ​​the uncovered pores is input into the pre-stored leakage area-weight compensation mapping relationship to generate weight compensation parameters.

2. The weight recognition method according to claim 1, characterized in that, Before the step of when the user / object covers the surface of the scale, the method further includes: An annular sealed chamber is provided on the side wall of the scale body. The annular sealed chamber is filled with dry gas at a pressure higher than the ambient air pressure and is connected to the edge of the rigid scale plate through a gas guide groove.

3. The weight recognition method according to claim 1, characterized in that, The step of transmitting pressure to the side-wall sealed chamber through the rigid weighing plate when a user / object covers the surface of the weighing body, causing the gas sealed in the chamber to leak outward from the micro-pores in the side wall of the weighing body, includes: When the user / object is on the surface of the scale, the rigid scale plate is compressed, and the pressure is converted into lateral compression on the annular sealed chamber through the air guide groove; The gas inside the annular sealed chamber is forced out through the micro-pore array on the side wall by compression; The opening direction of the micropores is parallel to the ground and is not blocked by users / objects.

4. The weight recognition method according to claim 1, characterized in that, The step of monitoring the pressure drop rate of the sealed chamber using a pressure sensor, and calculating the total area of ​​the uncovered pores based on the fluctuation intensity of the chamber pressure change and the duration of the pressure drop when the pressure drop rate exceeds a threshold, includes: Pressure data of the chamber is collected by a pressure sensor deployed inside the annular sealed chamber; When the pressure drop rate continuously exceeds the preset threshold and reaches the trigger duration, the trigger area is calculated. Extract the first complete fluctuation cycle during the pressure drop phase and calculate the pressure difference between the peak and trough as the fluctuation intensity; The time required for the line connecting the peak values ​​of the pressure fluctuations to drop from the initial value to a preset ratio is taken as the pressure drop duration. The total area of ​​uncovered pores is calculated based on the intensity and duration of the fluctuations.

5. The method according to claim 1, characterized in that, The leakage area-weight compensation mapping relationship is a nonlinear function model, and the correspondence between different leakage areas and weight compensation values ​​is established through calibration experiments.

6. The weight recognition method according to claim 1, characterized in that, The step of inputting the total area of ​​the uncovered vents into a pre-stored leakage area-weight compensation mapping relationship to generate weight compensation parameters includes: Invoke the pre-stored leakage area-weight compensation mapping relationship; Match the total area of ​​uncovered pores with the corresponding weight compensation parameters; Superimpose weight compensation parameters with the original parameters of the gravity sensor; The corrected gravity sensor reading is output as the final weight.

7. The weight recognition method according to claim 6, characterized in that, Following the step of superimposing the weight compensation value with the original data from the gravity sensor, the method further includes: Monitor the fluctuation status of pressure data in the sealed chamber; When the fluctuation range remains within the set threshold range for a stable period of time, the compensation value is locked and the final weight is output. If the fluctuation exceeds the set threshold range, the total area of ​​uncovered pores will be recalculated based on the current pressure data and the compensation value will be updated.

8. A weight recognition device, characterized in that, include: The physical unit is used to transmit pressure to the side wall sealed chamber through the rigid weighing plate when a user / object covers the surface of the weighing body, so that the gas sealed in the chamber leaks out from the micro-pores on the side wall of the weighing body. The calculation unit is used to monitor the pressure drop rate of the sealed chamber through a pressure sensor. When the pressure drop rate exceeds a threshold, it calculates the total area of ​​the uncovered pores based on the fluctuation intensity of the chamber pressure change and the duration of the pressure drop. The detection unit is used to input the total area of ​​the uncovered pores into a pre-stored leakage area-weight compensation mapping relationship to generate weight compensation parameters.

9. An electronic scale, characterized in that, include: A rigid weighing plate with no perforations, made of tempered glass or metal alloy; An annular sealed chamber is located inside the side wall of the scale body; An air guide channel connects the edge of the weighing plate to the chamber. A micropore array manufactured using MEMS technology is distributed on the outer sidewall of the cavity. MEMS pressure sensors are deployed at the center of the chamber wall; For performing the processing apparatus according to any one of claims 1-7.

10. The electronic scale according to claim 9, characterized in that, The air guide groove is inclined at an angle of 30°-45° to the horizontal plane; the inner wall of the air guide groove is provided with a spiral guide pattern.

Images