Lifting table control method and device and lifting table

Abstract

The invention discloses a lifting table control method and device and a lifting table, and relates to the technical field of intelligent office desks, and the lifting table control method comprises the following steps: obtaining pressure distribution data collected by a pressure sensor array and distance data, collected by an infrared distance measuring sensor, between a human body and a table edge in real time; dynamic coordinate data of the gravity center are captured through the pressure sensor, the infrared distance measuring sensor, the annular lamp strip, the microprocessor, the touch sensing unit, the voice prompter and the like, stealth posture deviations such as scoliosis and unilateral compression can be accurately quantified, and a multi-stage intervention strategy is output according to the deviation degree. The correction process is more targeted and scientific, micro-step lifting lower than a human body sensing threshold value is achieved, non-inductive induction is completed, a user is guided to correct the sitting posture through physiological instincts under the condition that the user is not conscious to be disturbed, and deep fusion of health intervention and focused office work is achieved.

Description

Technical Field

[0001] This invention relates to the field of intelligent office desk technology, specifically to a method, device, and height-adjustable desk control system. Background Technology

[0002] A smart desk is a type of office furniture that combines smart technology and human-centered design, aiming to improve work efficiency and comfort. A smart desk can help increase work productivity. Through a built-in electric height adjustment mechanism, it can automatically adjust the desk height to adapt to different work scenarios and individual needs.

[0003] With the profound changes in modern office models, prolonged sitting has become the norm for computer professionals, researchers, and students. Maintaining a fixed sitting posture for extended periods, especially when accompanied by poor posture such as scoliosis, shifted center of gravity, or excessive forward leaning, can easily lead to occupational health problems such as cervical spondylosis, lumbar disc herniation, and frozen shoulder. To alleviate the negative effects of prolonged sitting, height-adjustable desks, which allow users to switch between sitting and standing postures, have become widely used in recent years.

[0004] In existing technologies, height-adjustable desks and their auxiliary systems still have the following significant drawbacks in practical use:

[0005] First, the interactive feedback mode is too passive and rigid. Most smart height-adjustable desks on the market currently rely on timed alarms or preset-duration pop-up alerts for their "reminder and correction" functions. This intervention method is essentially a "command-style" reminder, completely ignoring the user's current work status. When users are engaged in deep thinking or high-intensity tasks, a sudden alarm or vibration forcibly interrupts their train of thought, resulting not only in a poor user experience but also causing many users to actively disable the reminder function out of annoyance, rendering the health intervention mechanism ineffective.

[0006] Secondly, the accuracy and dimensionality of posture recognition are severely lacking. Existing smart desk monitoring solutions typically employ simple pressure sensing or infrared human body sensing, whose core logic can only determine whether the user is "in place" or "away." However, in real-world office scenarios, the greatest health risks come from "hidden posture deviations" while seated, such as a shift in the center of gravity to one side due to prolonged single-handed mouse operation, or excessive forward head tilting due to eye strain. Existing single-modal sensing technologies struggle to extract the dynamic characteristics of the user's center of gravity and cannot quantify complex posture deviation indices, thus making it difficult to provide targeted adjustment suggestions.

[0007] Finally, the integration of mechanical adjustment logic and ergonomics is insufficient. Traditional height-adjustable desks typically employ manual or simple electric adjustment mechanisms, resulting in noticeably instantaneous and visible lifting movements. When the system detects a posture problem and triggers adjustment, excessively rapid column lifting can cause significant visual and mechanical vibration disturbances; conversely, no adjustment at all fails to provide substantial posture correction. Current technology lacks a closed-loop control scheme that integrates with human biofeedback to adjust microscopic physical parameters without inducing subjective user perception. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a method, device, and lifting table control system.

[0009] To achieve the above objectives, the technical solution of the present invention is as follows:

[0010] A method for controlling a height-adjustable desk includes the following steps:

[0011] Real-time acquisition of pressure distribution data collected by a pressure sensor array, and distance data between the human body and the edge of the table collected by an infrared ranging sensor;

[0012] The user's center of gravity coordinates are calculated based on pressure distribution data, and attitude evaluation parameters are calculated based on the offset of the center of gravity coordinates relative to the preset standard coordinates and the deviation of the distance data relative to the preset standard distance.

[0013] attitude evaluation parameters With the preset first threshold Second threshold In comparison, among which, ;

[0014] If the attitude evaluation parameters satisfy and Then, the drive motor of the height-adjusting table is controlled to drive the tabletop at the first speed to adjust the height, and the ring light strip set on the tabletop is controlled to emit a visual prompt signal.

[0015] If the attitude evaluation parameters satisfy Then, the tactile sensing unit of the height-adjustable table will output a tactile feedback signal, and the voice prompter will output a voice reminder signal.

[0016] Preferably, calculate attitude evaluation parameters The formula is as follows:

[0017] ;

[0018] in, This represents the magnitude of the two-dimensional offset vector of the centroid coordinates relative to the preset standard coordinates;

[0019] This represents the deviation of the distance data from the preset standard distance, where α and β are preset weighting coefficients.

[0020] Preferably, the value of the first speed is in the range of 0.1-5 mm / s.

[0021] Preferably, if the attitude evaluation parameters satisfy and It also includes:

[0022] The drive motor is controlled to operate according to a predetermined speed change curve so that the acceleration of the tabletop during startup and shutdown is below the human perception threshold.

[0023] A height-adjustable desk control device, comprising:

[0024] microprocessor;

[0025] The memory, which is electrically connected to the microprocessor, is used to store preset standard coordinates, standard distances, a first threshold, a second threshold, and program instructions;

[0026] The sensor interface, which is electrically connected to the microprocessor, is used to connect to the pressure sensor array and the infrared ranging sensor;

[0027] A motor driver, electrically connected to a microprocessor, is used to drive the drive motor;

[0028] The indicator controller, which is electrically connected to the microprocessor, is used to drive the ring light strip and the tactile sensing unit;

[0029] The microprocessor is configured to implement the steps of the height-adjustable desk control method by executing program instructions.

[0030] A height-adjustable desk, comprising:

[0031] Tabletop;

[0032] An array of pressure sensors embedded in the top of the tabletop and an infrared ranging sensor mounted on the tabletop;

[0033] A ring-shaped light strip embedded in the perimeter of the tabletop and a tactile sensing unit located at the bottom of the tabletop;

[0034] A lifting column assembly symmetrically arranged at the bottom of the tabletop includes a vertical lifting column and a horizontal fixing seat fixedly arranged at the top of the vertical lifting column;

[0035] The bottom drive assembly includes a vertical fixed cylinder, a drive motor, a lead screw fixedly mounted at the output end of the drive motor, and a lead screw nut assembly threadedly connected to the lead screw.

[0036] Adjustable table control device;

[0037] Among them, the pressure sensor and infrared ranging sensor are electrically connected to the sensor interface of the lifting table control device, the drive motor is electrically connected to the motor driver, and the ring light strip and tactile sensing unit are electrically connected to the prompt controller.

[0038] Preferably, it also includes a voice prompt device installed on the outer wall of the horizontal fixed base, which is electrically connected to the prompt controller of the lifting table control device.

[0039] Preferably, it also includes a control panel fixedly mounted on the side of the tabletop, which is communicatively connected to the microprocessor of the height-adjustable table control device.

[0040] Preferably, the bottom drive assembly further includes a return spring, which is sleeved on the outside of the lead screw.

[0041] Preferably, a nut sleeve is fixedly provided on the lead screw and nut assembly, and the top of the nut sleeve is fixedly connected to the bottom of the horizontal fixing seat.

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0043] This invention captures dynamic coordinate data of the center of gravity using pressure sensors, infrared ranging sensors, ring light strips, microprocessors, tactile sensing units, and voice prompts. It can accurately quantify hidden postural deviations such as scoliosis and unilateral pressure, and output multi-level intervention strategies based on the degree of deviation, making the correction process more targeted and scientific. It achieves micro-step lifting below the human perception threshold, completing imperceptible guidance and guiding users to correct their posture using physiological instincts without their awareness of interference. This achieves a deep integration of health intervention and focused work. Through external columns, guide rails, internal columns, spring limit pins, lead screws, and drive motors, the spring preload counteracts the static gravity of the tabletop and load, requiring the drive motor to overcome only minimal frictional resistance during startup and operation. This significantly reduces motor energy consumption and operating noise, while also avoiding overheating and wear caused by frequent imperceptible adjustments, greatly improving the system's lifespan and smoothness of interaction. Attached Figure Description

[0044] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0045] Figure 1 This is a schematic diagram of the structure of the height-adjustable table of the present invention;

[0046] Figure 2 This is a front view of the height-adjustable table of the present invention.

[0047] Figure 3 This is a schematic diagram of the top sensing component of the present invention;

[0048] Figure 4 This is a partially enlarged schematic diagram of the pressure sensor array of the top sensing component of the present invention;

[0049] Figure 5 This is a schematic diagram of the control panel functions of the top sensing component of the present invention;

[0050] Figure 6 This is a schematic diagram of the table lifting assembly of the present invention;

[0051] Figure 7 This is a schematic diagram of the bottom driving component of the present invention;

[0052] Figure 8 This is a schematic diagram of the drive motor of the bottom drive assembly of the present invention;

[0053] Figure 9 This is a cross-sectional view of the drive motor of the bottom drive assembly of the present invention.

[0054] Figure annotations: 1. Top sensing component; 101. Fixed baffle; 102. Tabletop; 103. Voice prompter; 104. Pressure sensor; 105. Tactile sensing unit; 106. First infrared ranging sensor; 107. Microprocessor; 108. Control panel; 109. Circular light strip; 110. Second infrared ranging sensor; 111. Manual tabletop adjustment button; 112. Light strip brightness adjustment button; 113. Tabletop height reset adjustment button; 114. Tactile sensing intensity adjustment button; 2. Lifting column assembly; 2 01. Horizontal fixed base; 202. Vertical lifting column; 203. Threaded hole; 3. Bottom drive assembly; 301. Vertical fixed cylinder; 302. First drive motor; 303. Support base; 304. Support foot pad; 305. Outer column; 306. Guide rail; 307. Spring limit pin; 308. Inner column; 309. Positioning bolt; 310. Lead screw; 311. Lead screw and nut pair; 312. Return spring; 313. Positioning pin; 314. Second drive motor; 315. Motor support; 316. Stator; 317. Rotor. Detailed Implementation

[0055] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0056] like Figure 1-9As shown, a method for controlling a height-adjustable desk includes the following steps:

[0057] Step 1: Real-time acquisition of pressure distribution data collected by the pressure sensor array, and distance data between the human body and the edge of the table collected by the infrared ranging sensor;

[0058] Specifically, the pressure distribution data is collected by a pressure array sensor 104 consisting of 31 pressure sensors. The sensor array can capture the pressure distribution pattern between the user's body and the tabletop 102, providing data support for subsequent calculation of the center of gravity coordinates and judgment of sitting crookedly or scoliosis.

[0059] Distance data between the human body and the edge of the table: collected by a pair of infrared ranging sensors installed at the front and top of the tabletop 102. The first infrared ranging sensor 106 detects the distance between the body and the edge of the table, and the second infrared ranging sensor 110 detects the distance between the head and the edge of the table. This data is used to determine whether the user is sitting hunched over or leaning forward excessively. The collected distance data provides a basis for quantifying the degree of forward leaning.

[0060] Step 2: Calculate the user's center of gravity coordinates based on pressure distribution data, and calculate the attitude evaluation parameters based on the offset of the center of gravity coordinates relative to the preset standard coordinates and the deviation of the distance data relative to the preset standard distance.

[0061] Specifically, by using the collected data and relying on an ergonomic standard sitting posture center of gravity feature library and quantification algorithms, abstract poor sitting postures are transformed into comparable numerical values, overcoming the limitation of traditional technologies in quantifying posture deviations. The specific calculations are as follows:

[0062] Define the sensor's physical coordinates and real-time pressure value:

[0063] Assign a fixed two-dimensional physical coordinate to each pressure sensor 104: Set the pressure sensing area of ​​the tabletop 102 as a two-dimensional rectangular coordinate system, and assign a fixed two-dimensional physical coordinate to each pressure sensor 104. Each pressure sensor 104 is assigned a unique physical coordinate. ;

[0064] Microprocessor 107 real-time acquisition Real-time pressure values ​​from each sensor ,in .

[0065] Calculating the X and Y coordinates of the real-time center of gravity: The core of the weighted average method is to use the pressure value of each sensor as a weight to weight its physical coordinates, excluding sensors without pressure and avoiding interference from invalid data. The calculation formula is as follows:

[0066] ;

[0067] ;

[0068] Molecules: The sum of the products of the pressure value of each sensor and its own physical coordinates, reflecting that the greater the pressure, the greater the contribution to the center of gravity coordinates;

[0069] Denominator: The sum of pressure values ​​from all sensors, which is the total weight to ensure the rationality of coordinate calculation;

[0070] If all (When the user leaves the seat) the microprocessor 107 immediately stops attitude calculation to avoid invalid calculations.

[0071] If the coordinates / pressures of the three sensors are as follows:

[0072] , , ;

[0073] ;

[0074] ;

[0075] Calculate the magnitude of the center of gravity offset and ranging deviation :

[0076] Real-time coordinates / distance are compared with standard reference values ​​to quantify attitude deviation in a single dimension. Absolute values ​​are used because the direction of deviation (left / right, forward / backward) does not affect the degree of deviation; only the magnitude of the deviation needs to be considered.

[0077] Calculate the magnitude of the centroid offset vector :

[0078] The shift in the center of gravity is a shift in a two-dimensional plane; therefore, the magnitude of a two-dimensional vector represents the overall degree of shift, corresponding to the formula... Calculation of absolute value:

[0079] First, calculate the single-axis offsets of the X and Y axes:

[0080] ;

[0081] Next, calculate the magnitude of the two-dimensional offset vector, which is the actual distance of the centroid offset:

[0082] ;

[0083] Unit: mm The larger the value, the further the user's center of gravity deviates from the standard position, and the more severe the degree of sitting crookedly or scoliosis.

[0084] Calculate the distance measurement deviation :

[0085] Two infrared sensors collect body distance data respectively. Head distance Corresponding standard value and At this point, the weighted average or maximum value of the two deviations is taken, as follows:

[0086] ;

[0087] in, and These are the weighting coefficients for the ranging dimension. , The larger the value, the more severe the user's excessive forward leaning.

[0088] Substitute into the formula to calculate the final attitude evaluation parameters. This is a comprehensive quantitative value of center of gravity shift and excessive forward leaning. It has no fixed unit; the higher the value, the more severe the user's overall posture deviation, and the more necessary it is to trigger intervention.

[0089] ;

[0090] In order to The value is within a fixed range of 0-100. , Let it be the normalization coefficient, that is:

[0091] ;

[0092] ;

[0093] in, This is the maximum permissible offset of the center of gravity. This is the maximum permissible deviation in ranging. As a proportionality constant, ensure The value is between 0 and 100.

[0094] Step 3: Input attitude evaluation parameters With the preset first threshold Second threshold In comparison, among which, ;

[0095] If the attitude evaluation parameters satisfy and Then, the drive motor of the lifting table is controlled to drive the tabletop 102 at the first speed to adjust the height, and the ring light strip 109 set on the tabletop 102 is controlled to emit a visual prompt signal.

[0096] If the attitude evaluation parameters satisfy Then, the tactile sensing unit 105 of the height-adjustable table outputs a tactile feedback signal, and the voice prompter 103 outputs a voice reminder signal.

[0097] Specifically, quantification The value is compared with a preset two-level threshold to trigger a tiered intervention strategy, ensuring the effectiveness of the intervention while adhering to the design principle of not interrupting the user's work. Specifically, there are two scenarios:

[0098] Scenario 1: and This indicates a slight posture deviation, triggering the first level of intervention:

[0099] The drive motor that controls the height adjustment desk drives the tabletop 102 to adjust its height at a first speed. This speed range is based on the calibration value of human perception experiments and is lower than the human body's subjective perception threshold for linear motion. When the user is focused on working, they cannot perceive the tabletop 102 rising and falling. By utilizing the human body's physiological instinct to maintain balance, the user is guided to unconsciously and spontaneously correct their sitting posture.

[0100] The ring light strip 109 provides visual cues: The ring light strip 109 around the control table 102 emits visual cues as a light visual reminder, which complements the non-sensory adjustment and further guides the user to correct their sitting posture.

[0101] Smooth speed control of the motor: The drive motor runs according to the predetermined speed change curve, ensuring that the acceleration of the tabletop when it starts and stops is below the human perception threshold. This avoids the jerking sensation of the motor starting and stopping, and the sudden rise and fall that the user cannot perceive. With the dual guarantee of speed and acceleration, the adjustment is imperceptible and completely avoids interfering with the user's work flow.

[0102] Scenario 2: This indicates a severe posture deviation, triggering a Level 2 intervention:

[0103] The tactile sensing unit 105 outputs tactile feedback: the tactile sensing unit 105 at the bottom of the control table 102 outputs a tactile feedback signal, which can be based on... The value outputs mechanical pulse signals of different frequencies and amplitudes, allowing the user to perceive the posture deviation through the vibration of the tabletop 102;

[0104] The voice prompt device 103 outputs voice reminders: the voice prompt device 103 is triggered to issue voice reminders, forming a strong dual reminder with tactile feedback, ensuring that users can notice their serious poor posture in time and actively correct it.

[0105] Calculate attitude evaluation parameters The formula is as follows:

[0106] ;

[0107] in, This represents the magnitude of the two-dimensional offset vector of the centroid coordinates relative to the preset standard coordinates;

[0108] This represents the deviation of the distance data from the preset standard distance, where α and β are preset weighting coefficients.

[0109] The range of the first velocity is 0.1-5 mm / s.

[0110] If the attitude evaluation parameters satisfy and It also includes:

[0111] The drive motor is controlled to run according to a predetermined speed change curve so that the starting and stopping acceleration of the tabletop 102 is lower than the human perception threshold.

[0112] A height-adjustable desk control device, comprising:

[0113] Microprocessor 107;

[0114] The memory, which is electrically connected to the microprocessor 107, is used to store preset standard coordinates, standard distances, a first threshold, a second threshold, and program instructions;

[0115] The sensor interface, which is electrically connected to the microprocessor 107, is used to connect the pressure sensor 104 and the infrared ranging sensor.

[0116] A motor driver, electrically connected to the microprocessor 107, is used to drive a drive motor;

[0117] The indicator controller, which is electrically connected to the microprocessor 107, is used to drive the ring light strip 109 and the tactile sensing unit 105;

[0118] The microprocessor 107 is configured to implement the steps of the height-adjustable table control method by executing program instructions.

[0119] A height-adjustable desk, comprising:

[0120] Tabletop 102;

[0121] The pressure sensor 104 is embedded in the top of the tabletop 102 and the infrared ranging sensor is mounted on the tabletop 102.

[0122] A ring-shaped light strip 109 embedded in the periphery of the tabletop 102 and a tactile sensing unit 105 disposed at the bottom of the tabletop 102;

[0123] The lifting column assembly 2, which is symmetrically arranged at the bottom of the tabletop 102, includes a vertical lifting column 202 and a horizontal fixing seat 201 fixedly arranged at the top of the vertical lifting column 202;

[0124] The bottom drive assembly 3 includes a vertical fixed cylinder 301, a drive motor, a lead screw 310 fixedly installed at the output end of the drive motor, and a lead screw nut assembly 311 threadedly connected to the lead screw 310;

[0125] Adjustable table control device;

[0126] Among them, the pressure sensor 104 and the infrared ranging sensor are electrically connected to the sensor interface of the lifting table control device, the drive motor is electrically connected to the motor driver, and the ring light strip 109 and the tactile sensing unit 105 are electrically connected to the prompt controller.

[0127] Specifically, the tabletop 102, pressure sensor 104, and tactile sensing unit 105 constitute the top sensing component 1. The top sensing component 1 also includes a fixed baffle 101 fixedly installed at the top edge of the tabletop 102. There are 31 pressure sensors 104, which are used to detect whether the center of gravity deviates from the central area continuously, thereby determining whether the user is sitting in a crooked posture. A first infrared ranging sensor 106 is installed at the center position of the side edge of the tabletop 102 away from the fixed baffle 101, and a second infrared ranging sensor 110 is installed on the top of the tabletop 102, which are used to detect the distance between the user's body and the edge of the table and the top of the tabletop 102. If the distance is too close, it is determined that the user is sitting in a crouching posture. The microprocessor 107 of the height-adjustable table control device is fixedly installed at the bottom of the tabletop 102. There are two tactile sensing units 105, which are symmetrically installed on both sides of the microprocessor 107. The tactile sensing unit 105 can adjust the vibration sensing intensity to remind the user to correct their posture.

[0128] Furthermore, the lifting column assembly 2 is provided with two sets: a horizontal fixed base 201 is fixedly installed at the bottom of the tabletop 102, and a vertical lifting column 202 is fixedly installed at the bottom of the horizontal fixed base 201. The vertical lifting column 202 has a threaded hole 203 inside that mates with the lead screw 310. The vertical lifting column 202 is slidably installed in the vertical fixed cylinder 301 of the bottom drive assembly 3. A support base 303 is fixedly installed at the bottom of the vertical fixed cylinder 301, and support feet 304 are symmetrically arranged at the bottom of the support base 303. The vertical lifting column 202 lifts and lowers the tabletop 102 at an extremely low speed, which is lower than the human body's subjective perception threshold for linear motion, thereby achieving physical intervention without interfering with the user's consciousness.

[0129] Furthermore, the bottom drive assembly 3 includes a first drive motor 302 and a second drive motor 314. Both the first drive motor 302 and the second drive motor 314 are provided with an outer column 305 and an inner column 308 that are rigidly connected. A guide rail 306 is fixedly installed on the side of the outer column 305. The outer column 305 is fixed to the vertical fixed cylinder 301 by a positioning bolt 309. A spring limit pin 307 is installed inside the inner column 308. A positioning pin 313 is installed at the top of the first drive motor 302 and the second drive motor 314, and a motor support 315 is installed at the bottom. The stator 316 of the internal parts of the first drive motor 302 and the second drive motor 314 provides a fixed magnetic field, so that the rotor 317 rotates under the action of the magnetic field and drives the lead screw 310 to rotate.

[0130] It also includes a voice prompter 103 installed on the outer wall of the horizontal fixed base 201, which is electrically connected to the prompter controller of the lifting table control device.

[0131] Specifically, by embedding a ring light strip 109 around the outer perimeter of the tabletop 102, when the user's sitting posture begins to deviate from the standard state and reaches the first threshold, the ring light strip 109 flashes continuously to prompt the user to correct their posture. The microprocessor 107 installed at the bottom of the tabletop 102 analyzes and processes the data monitored by the pressure sensor 104, the first infrared ranging sensor 106, and the second infrared ranging sensor 110. Based on the data processing results of the microprocessor 107, when it is determined that the user's sitting posture deviates from the standard value and reaches the second threshold, the tactile sensing unit 105 outputs mechanical pulse signals of different frequencies and amplitudes, and the voice prompter 103 provides voice prompts to the user to correct their sitting posture.

[0132] It also includes a control panel 108 fixedly installed on the side of the tabletop 102, which is communicatively connected to the microprocessor 107 of the height-adjustable table control device.

[0133] The bottom drive assembly 3 also includes a return spring 312, which is sleeved on the outside of the lead screw 310.

[0134] A nut sleeve is fixedly installed on the lead screw nut assembly 311, and the top of the nut sleeve is fixedly connected to the bottom of the horizontal fixed seat 201.

[0135] Specifically, the control panel 108 includes a manual tabletop adjustment button 111, a light strip brightness adjustment button 112, a tabletop height reset adjustment button 113, and a tactile sensing intensity adjustment button 114. These four adjustment buttons enable intelligent operation of the table. The control panel 108 is electrically connected to the microprocessor 107 via a bus protocol. Its core function is to realize the input of user biometric parameters and the customization of system intervention strategies. The specific operating procedure is as follows:

[0136] When a user uses the device for the first time, they input basic information such as height and weight through the control panel 108, and the system guides them to complete the standard sitting posture data collection, which is then stored in the memory. Multiple users' basic information can be entered. The user can directly drive the drive motor at the bottom via the manual tabletop adjustment button 111. Utilizing the load balance characteristics of the lead screw 310 and the return spring 312, the tabletop can be raised and lowered quickly and smoothly, meeting the needs of alternating sitting and standing work. The user can adjust the intensity of the ring light strip 109 using the light strip brightness adjustment button 112 according to the ambient light. Thanks to the pre-tension design of the return spring 312, the tabletop height reset adjustment button 113 provides auxiliary support that offsets most of the static load on the tabletop during the reset operation, allowing the drive motor to overcome the rotational inertia of the lead screw 310 and quickly and smoothly adjust the tabletop to the reference position. The user can adjust the frequency and amplitude to generate different mechanical pulse signals via the tactile feedback intensity adjustment button 114.

[0137] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A method for controlling a height-adjustable desk, characterized in that, Includes the following steps: Real-time acquisition of pressure distribution data collected by a pressure sensor array, and distance data between the human body and the edge of the table collected by an infrared ranging sensor; The user's center of gravity coordinates are calculated based on pressure distribution data, and attitude evaluation parameters are calculated based on the offset of the center of gravity coordinates relative to the preset standard coordinates and the deviation of the distance data relative to the preset standard distance. attitude evaluation parameters With the preset first threshold Second threshold In comparison, among which, ; If the attitude evaluation parameters satisfy and Then, the drive motor of the height-adjusting table is controlled to drive the tabletop at the first speed to adjust the height, and the ring light strip set on the tabletop is controlled to emit a visual prompt signal. If the attitude evaluation parameters satisfy Then, the tactile sensing unit of the height-adjustable table will output a tactile feedback signal, and the voice prompter will output a voice reminder signal.

2. The method for controlling a height-adjustable desk according to claim 1, characterized in that: Calculate attitude evaluation parameters The formula is as follows: ； in, This represents the magnitude of the two-dimensional offset vector of the centroid coordinates relative to the preset standard coordinates; This represents the deviation of the distance data from the preset standard distance, where α and β are preset weighting coefficients.

3. The method for controlling a height-adjustable desk according to claim 1, characterized in that: The first velocity ranges from 0.1 to 5 mm / s.

4. The lifting control method according to claim 1, characterized in that: If the attitude evaluation parameters satisfy and It also includes: The drive motor is controlled to operate according to a predetermined speed change curve so that the acceleration of the tabletop during startup and shutdown is below the human perception threshold.

5. A height-adjustable table control device, characterized in that, include: microprocessor; The memory, which is electrically connected to the microprocessor, is used to store preset standard coordinates, standard distances, a first threshold, a second threshold, and program instructions; The sensor interface, which is electrically connected to the microprocessor, is used to connect pressure sensors and infrared ranging sensors. A motor driver, electrically connected to a microprocessor, is used to drive the drive motor; The indicator controller, which is electrically connected to the microprocessor, is used to drive the ring light strip and the tactile sensing unit; The microprocessor is configured to perform the method steps as described in any one of claims 1-4 by executing program instructions.

6. A height-adjustable desk, characterized in that, include: Tabletop; An array of pressure sensors embedded in the top of the tabletop and an infrared ranging sensor mounted on the tabletop; A ring-shaped light strip embedded in the perimeter of the tabletop and a tactile sensing unit located at the bottom of the tabletop; A lifting column assembly symmetrically arranged at the bottom of the tabletop includes a vertical lifting column and a horizontal fixing seat fixedly arranged at the top of the vertical lifting column; The bottom drive assembly includes a vertical fixed cylinder, a drive motor, a lead screw fixedly mounted at the output end of the drive motor, and a lead screw nut assembly threadedly connected to the lead screw. Adjustable table control device; Among them, the pressure sensor and infrared ranging sensor are electrically connected to the sensor interface of the lifting table control device, the drive motor is electrically connected to the motor driver, and the ring light strip and tactile sensing unit are electrically connected to the prompt controller.

7. A height-adjustable desk according to claim 6, characterized in that: It also includes a voice prompt device installed on the outer wall of the horizontal fixed base, which is electrically connected to the prompt controller of the height adjustment table control device.

8. A height-adjustable desk according to claim 6, characterized in that: It also includes a control panel fixedly mounted on the side of the tabletop, which communicates with the microprocessor of the height-adjustable table control device.

9. A height-adjustable desk according to claim 6, characterized in that: The bottom drive assembly also includes a return spring, which is sleeved on the outside of the lead screw.

10. A height-adjustable desk according to claim 9, characterized in that: A nut sleeve is fixedly installed on the lead screw and nut assembly, and the top of the nut sleeve is fixedly connected to the bottom of the horizontal fixed seat.

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