A sensor system for protecting the spinal health of students

Abstract

The present invention relates to the field of health management technology, and specifically to a sensing system for protecting the spinal health of a student group, comprising: a sensing module for real-time sensing of user sitting posture pressure parameters; a building module for receiving the user sitting posture pressure parameters sensed in real time by the sensing module, and building a user sitting posture model based on the user sitting posture pressure parameters; an evaluation module for acquiring the user sitting posture model built in the building module, and evaluating the safety of the user's spinal load state based on the user sitting posture model; the present invention constructs the user sitting posture model with a specific operating logic, and then uses the user sitting posture model to evaluate whether the user's spinal load state is safe and provides feedback to the user in the form of vibration, thereby achieving the effect of real-time prompting of the user's sitting posture, maintaining the user's sitting posture health, and being different from a physical sitting posture correction device, not restraining the user's body, and effectively preventing and correcting the user's bad sitting posture.

Description

Technical Field

[0001] The present invention relates to the technical field of health management, and in particular to a sensor system for protecting the spinal health of a student group. Background Art

[0002] The spinal health issues of students have always received widespread attention, and as a result, many spinal correction or sitting posture correction devices have been derived in society. The most common one is the "posture correction brace". This device can help users maintain a correct sitting or standing posture by providing back support, thereby improving bad posture. At the same time, it can disperse the body weight and reduce the burden on the back, thereby reducing back fatigue caused by sitting for long periods of time.

[0003] The utility model patent with application number 202022245948.7 discloses a posture correction belt for spinal correction, including a main body, which includes a back pair, shoulder straps are provided on the left and right sides of the top of the back pair, and lead belts are connected to the ends of the two shoulder straps, and abdominal belts are provided on the left and right sides of the bottom of the back pair; it also includes an adjustment plate, a main support bar is provided at the middle part of the front end of the back pair, and multiple groups of fixed slots are provided at the front end of the main support bar, two groups of fixed blocks are provided at the rear end of the adjustment plate, and the two groups of fixed blocks are respectively inserted into the two groups of fixed slots, and an adjustment belt is provided at the front end of the adjustment plate, a cavity is provided inside the adjustment belt, and two groups of inlet ports are connected to the top of the adjustment belt, and outlet ports are connected to the left and right sides of the adjustment belt.

[0004] This application aims to solve the problem that "existing posture correction belts generally include a main body, the middle part of the main body is a back panel, shoulder straps are provided on the left and right sides of the top of the back panel, the ends of the shoulder straps are connected to lead belts, and abdominal straps are provided on the left and right sides of the bottom of the back panel. When in use, the two abdominal straps are wrapped around the abdomen, and the two shoulder straps are respectively passed around the two shoulders and crossed at the back, and connected at the bypass abdomen position, applying force backward to the shoulders to achieve a correction effect. However, in order to correct the spine, it is necessary to disperse the force to the central part of the spine. Different users have different body shapes, and some users cannot make the force application part located in the central part of the spine. Therefore, the correction effect over the spine is poor, or even fails to achieve the purpose of correcting the spine, resulting in low practicality."

[0005] However, long-term use of the "posture correction brace" may cause muscle atrophy, causing the back muscles to gradually lose their self-supporting ability, making spinal problems more serious. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a sensor system for protecting the spinal health of students, which solves the technical problems raised in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A sensing system for protecting the spinal health of a student group comprises: a sensing module for sensing a user's sitting posture state pressure parameter in real time; a building module for receiving the user's sitting posture state pressure parameter sensed in real time by the sensing module, and building a user's sitting posture state model based on the user's sitting posture state pressure parameter; an evaluation module for acquiring the user's sitting posture state model constructed in the building module, and evaluating the safety of the user's spinal load state based on the user's sitting posture state model; a prompt module for prompting the user that the spinal load is large in the current sitting posture; a message module for recording the prompt module's operating parameters, and generating a user's sitting posture message based on the prompt module's operating parameters; and a feedback module for receiving the user's sitting posture message generated in the message module, and feeding back the user's sitting posture message to the user.

[0009] The sensing module is interactively connected to a pressure sensor and a database via a local area network, the sensing module is interactively connected to a construction module via a local area network, the construction module is electrically connected to an input unit via a medium, the construction module is interactively connected to the database via a local area network, the construction module is interactively connected to an evaluation module and a prompt module via a local area network, and the prompt module is interactively connected to a message module and a feedback module via a local area network.

[0010] Furthermore, the sensor module is provided with submodules at the lower level, including:

[0011] Pressure sensor, used to sense pressure parameters in real time;

[0012] A database for receiving user sitting posture pressure parameters sensed in real time by the sensor module;

[0013] The pressure sensors are provided in four groups, and the four groups of pressure sensors are named left hip, right hip, left elbow, and right elbow respectively. The pressure sensors named left hip and right hip are installed on the left and right areas of the chair seat surface, and the pressure sensors named left elbow and right elbow are installed on the left and right areas of the desk surface. The pressure parameters sensed by the four groups of pressure sensors at the same time stamp are marked based on the pressure sensor names, and sent to and stored in the database;

[0014] Among them, the set of four sets of pressure parameters sensed by the four sets of pressure sensors at the same timestamp is recorded as the user's sitting state pressure parameters. When the pressure parameters sensed by the four sets of pressure sensors at the same timestamp are stored in the database, they are differentiated and stored based on the timestamp.

[0015] Furthermore, when constructing the user sitting posture state model, the construction module receives the user sitting posture state pressure parameters from the database, and constructs the user sitting posture state model in sequence based on the timestamps corresponding to the different intervals in the database, so that the user sitting posture state pressure parameters with earlier timestamps are prioritized for executing the user sitting posture state model construction;

[0016] After the user sitting posture state model constructed by the construction module is completed, it is distinguished based on the time stamp corresponding to the user sitting posture state pressure parameter source distinction interval applied in the construction phase, and is synchronously transmitted to the corresponding distinction interval in the database for storage.

[0017] Furthermore, the pressure sensors are installed on the seats of the two groups of chairs and their coordinates are marked as (x, y, z) and (x′, y′, z′), and the pressure sensors are installed on the desktops of the two groups of desks and their coordinates are marked as (i, j, q) and (i′, j′, q′);

[0018] In the stage of constructing the user sitting posture state model, the construction module uses two sets of pressure values ​​sensed by the pressure sensors installed on the two sets of chair seats, denoted as p1 and p2, to replace the values ​​on the z-axis of the corresponding pressure sensor position coordinates, thereby obtaining two new sets of coordinates, namely (x, y, p1) and (x′, y′, p2). The two sets of new coordinates are connected to obtain a set of line segments;

[0019] The two sets of pressure values ​​sensed by the pressure sensors installed on the two sets of desks are denoted as p3 and p4. The values ​​on the z-axis of the corresponding pressure sensor position coordinates are replaced respectively to obtain two new sets of coordinates, namely (i, j, p3) and (i′, j′, p4). The two new sets of coordinates are connected to form a line segment.

[0020] A set of faces is determined based on the two sets of line segments. The determined faces are recorded as the user sitting posture state model, and a reference face is simultaneously configured for the user sitting posture state model. The reference face is a set of horizontal planes including coordinates (x, y, z) and (x′, y′, z′).

[0021] Furthermore, the building block is internally provided with submodules, including:

[0022] An input unit is used to input pressure parameters of a standard user sitting posture state and feed them back to a construction module, so as to construct a standard user sitting posture state model through the construction module;

[0023] Among them, during the operation stage of the input module, the user sits on the desk or chair in the correct sitting posture and remains still for three seconds. The sensing module runs once within a time period of 1 to 2 seconds within the time threshold of the user sitting on the desk or chair in the correct sitting posture and remains still for three seconds, and senses the user's sitting posture state pressure parameters. The sensed user sitting posture state pressure parameters are the standard user sitting posture state pressure parameters.

[0024] Furthermore, when evaluating the spinal load status of the user, the evaluation module always applies the three sets of user sitting posture models stored most recently in the database for evaluation;

[0025]

[0026] Where: sim(a1,b) is the similarity between the earliest user sitting posture model a1 and the standard user sitting posture model b among the three groups of newly stored user sitting posture models;

[0027] Among them, a1, a2, and a3 represent the three most recently stored user sitting posture models. When sim(a1, b) ≥ 85% and either equation (1) or equation (2) holds true, it indicates that the user's spinal load state is safe. Otherwise, it indicates that the user's spinal load state is unsafe.

[0028] Furthermore, the value of sim(a1,b) is obtained by the following formula:

[0029]

[0030] Where: is the average slope of the user's sitting posture model a1 based on the reference surface; is the average slope of the reference surface based on the standard user sitting posture model b; is the standard deviation of the slope of the user's sitting posture model a1; σ b is the standard deviation of the slope of the standard user sitting posture model b; is the maximum value of the two groups of slopes; is the maximum value of the standard deviation of the two groups of slopes; The shortest distance from the farthest point from the reference surface to the reference surface on the user's sitting posture model a1; d b It is the shortest distance from the farthest point from the reference surface to the reference surface on the standard user sitting posture model b.

[0031] Furthermore, the prompt module is integrated with a small vibrator, which is installed at the center of the seat surface of the chair. The vibration is used as a prompt signal to remind the user that the spinal load is high in the current sitting posture;

[0032] Among them, the prompt module runs to continuously receive the evaluation results of the evaluation module. When the evaluation results show that the user's spinal load status is unsafe for two consecutive times, the prompt module is triggered to run.

[0033] Furthermore, the user sitting posture message content generated in the message module includes: the number of prompt module operations, the prompt module operation timestamp, and the continuous operation time of each prompt module;

[0034] When the feedback module feeds back the user sitting posture message to the user, it uses the mobile computer device with networking function held by the user as the transmission target, and transmits the user sitting posture message to the mobile computer device with networking function held by the user based on the local area network. The user reads the user sitting posture message on the mobile computer device.

[0035] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0036] The present invention provides a sensing system for protecting the spinal health of students. During operation, the system constructs a user sitting posture model with specific operating logic, and then uses the user sitting posture model to evaluate whether the user's spinal load state is safe and provides feedback to the user in the form of vibration, thereby achieving the effect of real-time prompting of the user's sitting posture, maintaining the user's sitting posture health. Unlike physical sitting posture correction equipment, the system does not restrain the user's body, effectively prevents and corrects the user's bad sitting posture, and protects the user's spinal health and vision health. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0038] Figure 1 The figure is a schematic diagram of a sensor system for protecting the spinal health of students;

[0039] Figure 2 This is an example diagram of the user sitting posture model and the reference surface in the present invention. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] The present invention will be further described below with reference to the embodiments.

[0042] Example 1:

[0043] This embodiment is a sensor system for protecting the spinal health of students, such as Figure 1Shown, including:

[0044] The sensor module is used to sense the user's sitting posture pressure parameters in real time;

[0045] The sensor module is equipped with submodules, including:

[0046] Pressure sensor, used to sense pressure parameters in real time;

[0047] A database for receiving user sitting posture pressure parameters sensed in real time by the sensor module;

[0048] There are four groups of pressure sensors, which are named left hip, right hip, left elbow, and right elbow respectively. The pressure sensors named left hip and right hip are installed on the left and right areas of the chair seat, and the pressure sensors named left elbow and right elbow are installed on the left and right areas of the desk surface. The pressure parameters sensed by the four groups of pressure sensors at the same time stamp are marked based on the pressure sensor name, and sent to and stored in the database;

[0049] The set of four pressure parameters sensed by the four pressure sensors at the same timestamp is recorded as the user's sitting posture pressure parameter. When the pressure parameters sensed by the four pressure sensors at the same timestamp are stored in the database, they are differentiated and stored based on the timestamp.

[0050] A construction module is used to receive the user sitting posture state pressure parameters perceived in real time by the sensor module, and to construct a user sitting posture state model based on the user sitting posture state pressure parameters;

[0051] The building block is internally configured with submodules, including:

[0052] An input unit is used to input pressure parameters of a standard user sitting posture state and feed them back to a construction module, so as to construct a standard user sitting posture state model through the construction module;

[0053] Among them, during the operation phase of the input module, the user sits on the desk or chair in the correct sitting posture and remains still for three seconds. The sensing module operates once within a 1-2 second period within the time threshold of the user sitting on the desk or chair in the correct sitting posture and remains still for three seconds to sense the user's sitting posture state pressure parameter. The sensed user sitting posture state pressure parameter is the standard user sitting posture state pressure parameter;

[0054] An evaluation module is used to obtain the user sitting posture state model constructed in the construction module, and evaluate the safety of the user's spinal load state based on the user sitting posture state model;

[0055] When evaluating the user's spinal load status, the evaluation module always uses the three sets of user sitting posture models stored in the database for evaluation;

[0056]

[0057] Where: sim(a1,b) is the similarity between the earliest user sitting posture model a1 and the standard user sitting posture model b among the three groups of newly stored user sitting posture models;

[0058] Among them, a1, a2, and a3 represent the three most recently stored user sitting posture models. When sim(a1, b) ≥ 85% and either equation (1) or equation (2) holds true, it indicates that the user's spinal load state is safe. Otherwise, it indicates that the user's spinal load state is unsafe.

[0059] The value of sim(a1,b) is obtained by the following formula:

[0060]

[0061] Where: is the average slope of the user's sitting posture model a1 based on the reference surface; is the average slope of the reference surface based on the standard user sitting posture model b; is the standard deviation of the slope of the user's sitting posture model a1; σ b is the standard deviation of the slope of the standard user sitting posture model b; is the maximum value of the two groups of slopes; is the maximum value of the standard deviation of the two groups of slopes; The shortest distance from the farthest point from the reference surface to the reference surface on the user's sitting posture model a1; d b The shortest distance from the farthest point from the reference surface to the reference surface on the standard user sitting posture model b;

[0062] A prompt module is used to remind the user that the spinal load is heavy in the current sitting posture;

[0063] A message module is used to record the operating parameters of the prompt module and generate a user sitting posture message based on the operating parameters of the prompt module;

[0064] A feedback module is used to receive the user sitting posture message generated by the message module and feed back the user sitting posture message to the user;

[0065] The sensing module is interactively connected to the pressure sensor and the database through the local area network, the sensing module is interactively connected to the construction module through the local area network, the construction module is electrically connected to the input unit through the medium, the construction module is interactively connected to the database through the local area network, the construction module is interactively connected to the evaluation module and the prompt module through the local area network, and the prompt module is interactively connected to the message module and the feedback module through the local area network.

[0066] In this embodiment, the sensing module operates to sense the user's sitting posture state pressure parameters in real time, the pressure sensor senses the pressure parameters in real time, the database synchronously receives the user's sitting posture state pressure parameters sensed in real time by the sensing module, the construction module further receives the user's sitting posture state pressure parameters sensed in real time by the sensing module, and constructs a user sitting posture state model based on the user's sitting posture state pressure parameters, the input unit synchronously inputs the standard user sitting posture state pressure parameters, and feeds back to the construction module, the standard user sitting posture state model is constructed by the construction module, the evaluation module is post-operated to obtain the user sitting posture state model constructed in the construction module, and the user's spinal load state safety is evaluated based on the user sitting posture state model, the prompt module further prompts the user that the spinal load is large under the current sitting posture, and then the message module records the prompt module operation parameters, generates a user sitting posture message based on the prompt module operation parameters, and finally receives the user sitting posture message generated in the message module through the feedback module, and feeds back the user sitting posture message to the user;

[0067] See also Figure 2 As shown in the figure, the upper group of surfaces represent the user's sitting posture model, and the lower plane represents the reference surface.

[0068] Example 2:

[0069] In terms of specific implementation, based on Example 1, this example refers to Figure 1 The sensor system for protecting the spinal health of students in Example 1 is further described in detail:

[0070] When constructing the user sitting posture state model, the construction module receives the user sitting posture state pressure parameters from the database, and constructs the user sitting posture state model in sequence based on the corresponding timestamps of each partition interval in the database, so that the user sitting posture state pressure parameters with earlier timestamps are prioritized for constructing the user sitting posture state model;

[0071] After the user sitting posture state model constructed by the construction module is completed, it is distinguished based on the time stamp corresponding to the user sitting posture state pressure parameter source distinction interval applied in the construction phase, and is synchronously transmitted to the corresponding distinction interval in the database for storage.

[0072] Through the above settings, when the construction module runs to build the user sitting posture state model, further operation logic is provided to ensure that the user sitting posture state model is stably built.

[0073] like Figure 1 As shown, the position coordinates of the pressure sensors installed on the seats of the two groups of chairs are marked as (x, y, z) and (x′, y′, z′), and the position coordinates of the pressure sensors installed on the desktops of the two groups of desks are marked as (i, j, q) and (i′, j′, q′);

[0074] When constructing the user sitting posture model, the construction module uses two sets of pressure values ​​sensed by the pressure sensors installed on the two chair seats, denoted as p1 and p2, to replace the values ​​on the z-axis of the corresponding pressure sensor position coordinates, thereby obtaining two new sets of coordinates, namely (x, y, p1) and (x′, y′, p2). The two sets of new coordinates are connected to form a set of line segments.

[0075] The two sets of pressure values ​​sensed by the pressure sensors installed on the two sets of desks are denoted as p3 and p4. The values ​​on the z-axis of the corresponding pressure sensor position coordinates are replaced respectively to obtain two new sets of coordinates, namely (i, j, p3) and (i′, j′, p4). The two new sets of coordinates are connected to form a line segment.

[0076] A set of faces is determined based on the two sets of line segments. The determined faces are recorded as the user sitting posture state model, and a reference face is simultaneously configured for the user sitting posture state model. The reference face is a set of horizontal planes containing coordinates (x, y, z) and (x′, y′, z′).

[0077] The above settings provide necessary parameter support for the construction of the user sitting posture state model and provide source logic restrictions for the parameters used to construct the user sitting posture state model.

[0078] Example 3:

[0079] In terms of specific implementation, based on Example 1, this example refers to Figure 1 The sensor system for protecting the spinal health of students in Example 1 is further described in detail:

[0080] The reminder module is integrated with a small vibrator, which is installed in the center of the seat surface of the classroom chair. The vibration is used as a reminder signal to remind the user that the spinal load is high in the current sitting posture;

[0081] Among them, the prompt module runs to continuously receive the evaluation results of the evaluation module. When the evaluation results show that the user's spinal load status is unsafe for two consecutive times, the prompt module is triggered to run.

[0082] like Figure 1 As shown, the user sitting posture message content generated in the message module includes: the number of prompt module operations, the prompt module operation timestamp, and the continuous operation time of each prompt module;

[0083] When the feedback module feeds back the user's sitting posture message to the user, it uses the user's mobile computer device with Internet access as the transmission target, and transmits the user's sitting posture message to the user's mobile computer device with Internet access based on the local area network. The user reads the user's sitting posture message on the mobile computer device.

[0084] In this embodiment, through the above settings, the operating logic of the prompt module, message module and feedback module of the system in Example 1 is further limited to ensure that the system not only assists the user in correcting the sitting posture, but also provides feedback to the user on the sitting posture problems in the form of messages.

[0085] In summary, in the above embodiment, during operation, the system constructs a user sitting posture state model with specific operation logic, and then uses the user sitting posture state model to evaluate whether the user's spinal load state is safe and provides feedback to the user in the form of vibration, thereby achieving the effect of real-time prompting of the user's sitting posture, maintaining the user's sitting posture health, and being different from physical sitting posture correction equipment. It does not restrain the user's body, effectively prevents and corrects the user's bad sitting posture, and protects the user's spinal health and vision health.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A sensor system for protecting the spinal health of students, characterized in that: include: The sensor module is used to sense the user's sitting posture pressure parameters in real time; A construction module is used to receive the user sitting posture state pressure parameters perceived in real time by the sensor module, and to construct a user sitting posture state model based on the user sitting posture state pressure parameters; An evaluation module is used to obtain the user sitting posture state model constructed in the construction module, and evaluate the safety of the user's spinal load state based on the user sitting posture state model; A prompt module is used to remind the user that the spinal load is heavy in the current sitting posture; A message module is used to record the operating parameters of the prompt module and generate a user sitting posture message based on the operating parameters of the prompt module; The user sitting posture message content generated in the message module includes: the number of prompt module operations, the prompt module operation timestamp, and the continuous operation time of each prompt module; When feeding back the user's sitting posture message to the user, the feedback module uses the user's mobile computer device with network function as the transmission target and transmits the user's sitting posture message to the mobile computer device with network function held by the user via the local area network. The user reads the user's sitting posture message on the mobile computer device; A feedback module is used to receive the user sitting posture message generated by the message module and feed back the user sitting posture message to the user; The sensor module is provided with submodules at the lower level, including: Pressure sensor, used to sense pressure parameters in real time; A database for receiving user sitting posture pressure parameters sensed in real time by the sensor module; The pressure sensors are provided in four groups, and the four groups of pressure sensors are named left hip, right hip, left elbow, and right elbow respectively. The pressure sensors named left hip and right hip are installed on the left and right areas of the chair seat surface, and the pressure sensors named left elbow and right elbow are installed on the left and right areas of the desk surface. The pressure parameters sensed by the four groups of pressure sensors at the same time stamp are marked based on the pressure sensor names, and sent to and stored in the database; Among them, the set of four groups of pressure parameters sensed by the four groups of pressure sensors at the same timestamp is recorded as the user sitting posture state pressure parameters. When the pressure parameters sensed by the four groups of pressure sensors at the same timestamp are stored in the database, they are distinguished and stored based on the timestamp; the sensing module senses the user sitting posture state pressure parameters in real time, the pressure sensor senses the pressure parameters in real time, the database synchronously receives the user sitting posture state pressure parameters sensed by the sensing module in real time, the construction module further receives the user sitting posture state pressure parameters sensed by the sensing module in real time, and constructs a user sitting posture state model based on the user sitting posture state pressure parameters; the input unit synchronously inputs the standard user sitting posture state pressure parameters and feeds them back to the construction module; the standard user sitting posture state model is constructed by the construction module; the evaluation module is post-operated to obtain the user sitting posture state model constructed in the construction module, and the user spinal load state safety is evaluated based on the user sitting posture state model; the prompt module further prompts the user that the spinal load is large under the current sitting posture, and then the message module records the prompt module operation parameters, generates a user sitting posture message based on the prompt module operation parameters, and finally receives the user sitting posture message generated in the message module through the feedback module, and feeds the user sitting posture message back to the user; When evaluating the user's spinal load status, the evaluation module always uses the three sets of user sitting posture models stored in the database for evaluation; Where: sim(a1, b) is the similarity between the earliest user sitting posture model a1 and the standard user sitting posture model b among the three newly stored user sitting posture models; Where a1, a2, and a3 represent the three most recently stored user sitting posture models. When sim(a1, b) ≥ 85% and either equation (1) or equation (2) holds true, the user's spinal load state is safe. Otherwise, the user's spinal load state is unsafe. The prompt module is integrated with a small vibrator, which is installed at the center of the seat surface of the chair. The vibration is used as a prompt signal to remind the user that the spinal load is high in the current sitting posture; The prompt module continuously receives the evaluation results of the evaluation module when it is run. When the evaluation results show that the user's spinal load state is unsafe for two consecutive times, the prompt module is triggered to run. The value of sim(a1, b) is obtained by the following formula: Where: ka1 is the average slope of the user sitting posture state model a1 based on the reference surface; kb is the average slope of the standard user sitting posture state model b based on the reference surface; σa1 is the standard deviation of the slope of the user sitting posture state model a1; σb is the standard deviation of the slope of the standard user sitting posture state model b; is the maximum value of the two groups of slopes; is the maximum value of the two groups of slope standard deviations; da1 is the shortest distance from the farthest point from the reference surface to the reference surface on the user zu sitting state model a1; d b It is the shortest distance from the farthest point from the reference surface to the reference surface on the standard user sitting posture model b.

2. A sensor system for protecting the spinal health of students according to claim 1, characterized in that: When constructing the user sitting posture state model, the construction module receives the user sitting posture state pressure parameters from the database, and constructs the user sitting posture state model in sequence based on the timestamps corresponding to the different intervals in the database, so that the user sitting posture state pressure parameters with earlier timestamps are prioritized for constructing the user sitting posture state model; After the user sitting posture state model constructed by the construction module is completed, it is distinguished based on the time stamp corresponding to the user sitting posture state pressure parameter source distinction interval applied in the construction phase, and is synchronously transmitted to the corresponding distinction interval in the database for storage.

3. A sensor system for protecting the spinal health of students according to claim 1, characterized in that: The pressure sensors are installed on the seats of the two groups of chairs and their coordinates are marked as (x, y, z) and (x′, y′, z′). The pressure sensors are installed on the desktops of the two groups of desks and their coordinates are marked as (i, j, q) and (i′, j′, q′). In the stage of constructing the user sitting posture state model, the construction module uses two sets of pressure values ​​sensed by the pressure sensors installed on the two sets of chair seats, denoted as p1 and p2, to replace the values ​​on the z-axis of the corresponding pressure sensor position coordinates, thereby obtaining two new sets of coordinates, namely (x, y, p1) and (x′, y′, p2). The two sets of new coordinates are connected to obtain a set of line segments; The two sets of pressure values ​​sensed by the pressure sensors installed on the two sets of desks are denoted as p3 and p4. The values ​​on the z-axis of the corresponding pressure sensor position coordinates are replaced respectively to obtain two new sets of coordinates, namely (i, j, p3) and (i′, j′, p4). The two new sets of coordinates are connected to form a line segment. A set of faces is determined based on the two sets of line segments. The determined faces are recorded as the user sitting posture state model, and a reference face is simultaneously configured for the user sitting posture state model. The reference face is a set of horizontal planes including coordinates (x, y, z) and (x′, y′, z′).

4. A sensor system for protecting the spinal health of students according to claim 1, characterized in that: The building block is internally provided with submodules, including: An input unit is used to input pressure parameters of a standard user sitting posture state and feed them back to a construction module, so as to construct a standard user sitting posture state model through the construction module; Among them, during the operation stage of the input module, the user sits on the desk or chair in the correct sitting posture and remains still for three seconds. The sensing module runs once within a time period of 1 to 2 seconds within the time threshold of the user sitting on the desk or chair in the correct sitting posture and remains still for three seconds, and senses the user's sitting posture state pressure parameters. The sensed user sitting posture state pressure parameters are the standard user sitting posture state pressure parameters.

5. The sensor system for protecting the spinal health of students according to claim 1 is characterized in that: The sensing module is interactively connected to a pressure sensor and a database via a local area network, the sensing module is interactively connected to a construction module via a local area network, the construction module is electrically connected to an input unit via a medium, the construction module is interactively connected to the database via a local area network, the construction module is interactively connected to an evaluation module and a prompt module via a local area network, and the prompt module is interactively connected to a message module and a feedback module via a local area network.

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