CN111643287B

CN111643287B - Install in weight measurement system and wheelchair of wheelchair

Info

Publication number: CN111643287B
Application number: CN202010458888.9A
Authority: CN
Inventors: 张佟
Original assignee: Xuanwu Hospital
Current assignee: Xuanwu Hospital
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2022-06-10
Anticipated expiration: 2040-05-26
Also published as: CN111643287A

Abstract

The invention relates to a weight measuring system installed on a wheelchair, which at least comprises a weight measuring unit arranged on the wheelchair, wherein the weight measuring unit at least comprises a data acquisition module, a data display module and a data processing module; wherein, the data processing module is set up and is used for carrying out the real-time focus that the analysis obtained with the weight data signal that data acquisition module measured and compares with predetermined standard focus, when being greater than the threshold value of settlement according to the real-time focus that the measured weight data signal obtained after data processing module analysis processes and the error range of predetermined standard focus, update real-time focus to data display module in order to remind the user to notice self gesture change, prevent to take place because the condition that self focus suddenly changes and leads to the wheelchair to lose balance and overturn, accessible the control unit adjusts the wheelchair simultaneously, make real-time focus reply to within the error range of predetermined standard focus.

Description

Install in weight measurement system and wheelchair of wheelchair

Technical Field

The invention relates to the technical field of medical treatment, in particular to a wheelchair-mounted weight measuring system and a wheelchair.

Background

In order for physically handicapped people to be able to participate independently in productive activities and social activities, various auxiliary devices are required to enable them to adapt to life styles tailored to the handicapped public. One of the most common uses of wheelchairs is the many roles as a vehicle for disabled persons, and as is well known, a wheelchair is a type of wheelchair that is commonly used by patients or disabled persons, such as patients with a freezing condition, patients with parkinson's disease, etc. The patient often measures the weight in the treatment process, and generally the patient can measure by directly standing on the electronic scale, but for some patients sitting on the wheelchair, the patient walks down the wheelchair to measure, and then transfers back to the wheelchair after weighing is finished; the transfer process has certain safety hazards, and even some patients cannot leave the wheelchair at all, so that the weight measurement of the part of the patients sitting on the wheelchair is very important for the rehabilitation of the patients. Most of the existing hospitals or rehabilitation centers adopt a platform medical scale to solve the problems, the platform medical scale is a product specially tailored for the medical industry, the size is large, and the platform medical scale is provided with an upper slope and a lower slope so as to be convenient for a wheelchair to go up and down. Because the volume is great, generally fix in certain place, when patient need weigh, must go to this place and just can weigh, efficiency is very low to also there is the potential safety hazard at the in-process that removes, and the cost of manufacture of platform medical balance is high simultaneously.

For example, chinese patent (publication No. CN204581731U) discloses a weighing wheelchair comprising a wheelchair body, a lifting device, a weighing sensor and a display, wherein the lifting device has a four-bar linkage mechanism and can be folded when not weighing; when weighing is needed, the locking device is only required to be opened, the bottom edge of the four-bar linkage mechanism always droops under the action of gravity until a weighing sensor below the bottom edge lands on the ground, the lifting stress rod is inserted into the insertion hole in the side edge at the moment, the lifting stress rod is forcefully rotated to drive the side edge to rotate until the side edge is completely vertical, all wheels of the wheelchair body are jacked off the ground at the moment, and the weight of the wheelchair and the patient is displayed on the display; the principle of the weighing wheelchair is similar to that of a lever, the wheelchair is lifted by external force, labor is wasted during actual operation, and the weighing wheelchair is inconvenient to use.

Chinese patent (publication No. CN206518655U) discloses a wheelchair-type weight measuring instrument, which comprises a cushion suitable for a human body to sit on, a weighing frame, a supporting frame and a weighing sensor, wherein the bottom end of the weighing frame is horizontally provided with an upper mounting plate, the top end of the supporting frame is horizontally provided with a lower mounting plate, and the weighing sensor is arranged between the upper mounting plate and the lower mounting plate to realize the weighing function; the cushion is fixed to be set up the frame top of weighing, braced frame's bottom four corners sets up the universal wheel, and when patient sat on wheelchair formula weight measuring apparatu, cushion, weighing frame pushed down weighing sensor, and realization that can be convenient is weighed, need not to go up and down. The weighing structure of the wheelchair belongs to an integrated frame structure, the independent adjustment of the sitting position and the chair back can not be realized, especially, when the center of gravity of a patient on the wheelchair is changed, the adjustment of the whole center of gravity to a safe range can not be realized through the adjustment of the relevant structure of the wheelchair, and the wheelchair has the danger of overturning.

The weighing wheelchairs provided in the prior art and the patents are limited to simply weighing the weight of the user, and in a real-life use scene, especially for the user who needs to use the wheelchair for a long time to live, the scene experienced by the wheelchair is very complicated. For example, when a wheelchair is used to travel an uphill or downhill section, the level of the travel plane of the wheelchair changes, and the center of gravity of the entire wheelchair changes when the user uses the wheelchair, so that the center of gravity of the entire wheelchair deviates from the original stable state in real time, and the wheelchair may be overturned. In addition, for the rugged and continuously variable road surface, the fixed chair back can not move along with the back of the user in a bumpy state, and the back of the user can repeatedly impact the chair back, so that the whole use comfort of the wheelchair is reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a weight measuring system installed on a wheelchair, which at least comprises the wheelchair and a weight measuring unit, wherein the weight measuring unit at least comprises a data acquisition module, a data display module and a data processing module; the system is arranged for realizing the measurement of the real-time gravity center of the wheelchair user based on the weight data result measured by the weight measuring unit, and adjusting the real-time gravity center to the position of a preset standard gravity center based on the measurement result of the real-time gravity center of the wheelchair user measured by the weight measuring unit, so as to ensure that the user is always in a preset comfortable state on the wheelchair; the data processing module is used for comparing a real-time gravity center obtained by analyzing the weight data signals measured by the data acquisition module with a preset standard gravity center, and when an error range of the real-time gravity center obtained by analyzing and processing the measured weight data signals by the data processing module and the preset standard gravity center is larger than a set threshold value, updating the real-time gravity center to the data display module to remind a user of paying attention to self posture change, so that the situation that the wheelchair is out of balance and overturned due to sudden change of the self gravity center is prevented.

According to a preferred embodiment, the data acquisition module further comprises a control unit for adjusting the back of the wheelchair; the control unit responds to a comparison result of a real-time gravity center of a wheelchair user obtained after the data processing module analyzes and processes the data signals acquired by the data acquisition module and a preset standard gravity center, and adjusts the chair back of the wheelchair; the data processing module analyzes a pressure data signal acquired by a first pressure acquisition unit in the data acquisition module to obtain the real-time gravity center of a wheelchair user; the control unit is used for adjusting the deflection angle of the chair back of the wheelchair on the basis of a comparison result of a real-time gravity center obtained by analyzing the data processing module according to the pressure data signals collected by the first pressure acquisition unit and a preset standard gravity center obtained by analyzing the data processing module according to the pressure data signals collected by the first pressure acquisition unit when the data processing module is at the standard gravity center, until the pressure data signals collected by the first pressure acquisition unit and the pressure signals collected by the first pressure acquisition unit when the data processing module is at the standard gravity center reach a preset matching degree.

According to a preferred embodiment, the data acquisition module further comprises a plurality of second pressure acquisition units arranged on a back chair of the wheelchair; the control unit responds to a comparison result of a real-time gravity center of a wheelchair user obtained after the data processing module analyzes and processes the data signals acquired by the data acquisition module and a preset standard gravity center, and adjusts the chair back of the wheelchair; the data processing module analyzes a pressure data signal acquired by a first pressure acquisition unit in the data acquisition module to obtain the real-time gravity center of a wheelchair user; the control unit adjusts the deflection angle of the chair back of the wheelchair based on the comparison result of the pressure data signals acquired by the second pressure acquisition unit when the data processing module is at the real-time center of gravity and the pressure data signals acquired by the second pressure acquisition unit when the data processing module is at the standard center of gravity until the pressure data signals acquired by the second pressure acquisition unit and the pressure signals acquired by the second pressure acquisition unit when the data processing module is at the standard center of gravity reach a preset matching degree.

According to a preferred embodiment, the control unit adjusts the deflection angle of the backrest of the wheelchair based on a comparison result between an average pressure data signal obtained by performing an average calculation on the pressure data signal acquired by the second pressure acquisition unit at the real-time center of gravity and the average pressure data signal acquired by the second pressure acquisition unit at the standard center of gravity by the data processing module until the pressure data signal acquired by the second pressure acquisition unit reaches a preset matching degree with the pressure signal acquired by the second pressure acquisition unit at the standard center of gravity.

According to a preferred embodiment, the data storage module is configured to store account information of the user, preset standard data signals and collected data signals, wherein the collected data signals include weight data signals of the user collected by the data collection module and weight data signals analyzed and processed by the data processing module according to the data signals collected by the data collection module.

According to a preferred embodiment, the data acquisition module further comprises a foot length measuring module, the foot length measuring module is configured to measure the foot length of a person to be measured and send the foot length data to the data processing module, the data processing module is configured to compare the received foot length data with preset foot length data in the storage module, and the data processing module responds to a result of successful comparison and sends a weight data signal of the user to account information of the corresponding user.

According to a preferred embodiment, the data processing module analyzes and processes the weight data signals collected by the data collecting module based on a time series, and draws a continuous linear variation result to be sent to the data display module.

According to a preferred embodiment, the preset standard barycenter is set to be continuously linearly changed correspondingly based on the real-time barycenter linear change result.

A wheelchair for weight measurement at least comprises a data acquisition module, a data display, a data storage module and a data processing module; the wheelchair is arranged for enabling measurement of real-time weight of the wheelchair user based on the weight data results measured by the data acquisition module and displayed on the data display; the data processing module is arranged to compare the measurement result of the real-time weight of the wheelchair user measured by the data acquisition module with a preset standard weight, and when the error range of the real-time weight obtained after the data processing module analyzes and processes the measured weight data signal is larger than a set threshold value, the real-time weight is updated to the data display module to remind the user to notice the posture change of the user, so that the user can timely know the weight change condition on the wheelchair, and the condition that the condition of illness is delayed due to the fact that the weight change condition is ignored is avoided.

According to a preferred embodiment, the wheelchair further comprises a footboard having a second end capable of reciprocating in a direction toward the second end of the footboard along an axial direction of the footboard; when the axial direction of the pedal plate is vertical to the ground, the second end of the pedal plate completely abuts against the plane of the wheelchair.

The weight measuring system installed on the wheelchair provided by the invention at least has the following beneficial technical effects:

the weight measuring system installed on the wheelchair can compare the change of the real-time center of gravity of a user with the preset standard center of gravity, and adjust the deflection angle of the chair back of the wheelchair through the control unit according to the comparison result, so that the real-time center of gravity of the wheelchair returns to the error range of the preset standard center of gravity, and the condition that the wheelchair is overturned due to the fact that the balance of the wheelchair is lost due to the sudden change of the center of gravity of the wheelchair is prevented. In addition, to the road surface of rugged continuous change, through setting up the back of the chair that can carry out the adjustment according to real-time focus change, make the back of the chair of wheelchair can follow the back of user under the state of jolting and move, avoid user's back to produce the impact to the back of the chair repeatedly to improve the whole comfort of using of wheelchair.

Drawings

FIG. 1 is a schematic diagram of a weight weighing system provided by the present invention;

FIG. 2 is a schematic structural view of a wheelchair in a sitting position according to the present invention;

FIG. 3 is a schematic structural view of a wheelchair in a supine position provided by the present invention; and

fig. 4 is a schematic structural view of a footrest of a preferred embodiment of a wheelchair provided by the present invention.

List of reference numerals

1: the chair back 2: a seat 3: front wheel

4: rear wheel 5: the first pressure acquisition unit 6: second pressure acquisition unit

7: a foot pedal 8: connecting rod 9: telescopic spring

10: data display

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, the terms "first", "second", "third" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", "third", and "third" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "inner", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

As shown in fig. 1, the present embodiment provides a weight measurement system mounted on a wheelchair, including at least a wheelchair and a weight measurement unit. The system is configured to enable measurement of the real-time center of gravity of the wheelchair user based on the weight data results measured by the weight measurement unit, and to adjust the real-time center of gravity to a position of a preset standard center of gravity based on the measurement of the real-time center of gravity of the wheelchair user by the weight measurement unit, thereby ensuring that the user is always in a preset comfortable state on the wheelchair. The weight measuring unit at least comprises a data acquisition module, a data display module, a data storage module and a data processing module. The data processing module is set up and is used for carrying out the real-time focus that the analysis obtained with the weight data signal that data acquisition module measured and preset standard focus and compare, when being greater than the threshold value of settlement according to the real-time focus that obtains after data processing module analysis processes and the error range of the preset standard focus of storage in the data storage module according to the weight data signal of measurement, update real-time focus to data display module in order to remind the user to notice self gesture change, prevent that the condition that the wheelchair lost balance and turned over takes place because of the sudden change of self focus. Preferably, the set threshold is, for example, 5%. Specifically, the data acquisition module may include a plurality of pressure acquisition units. The data acquisition module can be the combination of each sensor and AD conversion chip, and each sensor is used for acquireing pressure, and the pressure of acquireing is converted into weight data through AD conversion chip. The data display module can be a liquid crystal display screen and is used for displaying the weight data acquired by the data acquisition module. The data storage module can be a RAM memory and is used for storing the weight data acquired by the data acquisition module. The pressure acquisition unit may be a pressure measurement sensor, such as a pressure sensor or a retransmission sensor, for acquiring the pressure. The data processing module can be realized by a functional module written in software and is used for processing the data signals acquired by the data acquisition module. Preferably, the pressure obtaining unit includes at least a first pressure obtaining unit. The first pressure acquisition units are arranged in an array on a seat of the wheelchair. The pressure acquisition unit further includes at least a second pressure acquisition unit. The second pressure acquisition units are arranged on the backrest of the wheelchair in an array.

According to a preferred embodiment, the data acquisition module further comprises a control unit for adjusting the back of the wheelchair. The control unit responds to a comparison result of a real-time gravity center of a wheelchair user obtained after the data processing module analyzes and processes the data signals acquired by the data acquisition module and a preset standard gravity center, and adjusts the chair back of the wheelchair. The data processing module analyzes the pressure data signal acquired by the first pressure acquisition unit in the data acquisition module to obtain the real-time gravity center of the wheelchair user. The control unit is used for adjusting the deflection angle of the chair back of the wheelchair on the basis of a comparison result of a real-time gravity center obtained by analyzing the pressure data signals acquired by the data processing module according to the first pressure acquisition unit when the real-time gravity center is in the standard gravity center and the preset standard gravity center obtained by analyzing the pressure data signals acquired by the data processing module according to the first pressure acquisition unit when the standard gravity center is in the standard gravity center, until the pressure data signals acquired by the first pressure acquisition unit and the pressure signals acquired by the first pressure acquisition unit when the standard gravity center is in the standard gravity center reach a preset matching degree. Specifically, the preset standard center of gravity is the center of gravity of the wheelchair user when the wheelchair user sits on the wheelchair in a normal posture. Preferably, the preset standard center of gravity can be reset. For example, by adjusting the inclination angle of the backrest of the wheelchair, a preset standard center-of-gravity state is set when the user feels the most comfortable deflection angle of the backrest, and the center of gravity formed by the user at this time is the preset standard center of gravity. Specifically, when the wheelchair is always operated on a horizontal ground, the position of the center of gravity of the user does not change, and the backrest of the wheelchair is always kept in a state of a preset standard center of gravity. When a user sits on the wheelchair and passes through the non-horizontal ground, the real-time gravity center of the user on the wheelchair is changed due to the fact that the inclination angle of the wheelchair is changed, and the gravity center position at the moment can be obtained through analysis of a pressure data signal acquired by the data processing module based on the first pressure acquisition unit arranged on the seat of the wheelchair. When the wheelchair is used for ascending, the wheelchair is lifted relative to the advancing direction, and the gravity center position of a user moves backwards and downwards relative to the position of the preset standard gravity center. In this state, if the slope is large, the wheelchair is liable to fall backward, which may cause danger to the user. When the data processing module obtains the real-time gravity center of the user of the wheelchair and the preset standard gravity center to deviate from the preset matching degree based on the analysis of the pressure data signals collected by the first pressure acquisition unit, the control unit adjusts the deflection angle of the chair back of the wheelchair, namely deflects the chair back of the wheelchair in the direction of an ascending slope, so that the position of the real-time gravity center of the user relative to the preset standard gravity center moves towards the front and upwards. When the pressure data signal acquired by the first pressure acquisition unit reaches the preset matching degree of the pressure data signal acquired by the first pressure acquisition unit when the pressure data signal reaches the preset standard gravity center, the control unit stops adjusting the deflection angle of the chair back of the wheelchair. When the wheelchair is used for downhill, the wheelchair is lowered relative to the forward direction, and the center of gravity of the user moves forward and upward relative to the position of the preset standard center of gravity. In this state, if the slope is large, the wheelchair is liable to overturn forward, which may cause danger to the user. When the data processing module analyzes and obtains the preset matching degree of the real-time gravity center of the user of the wheelchair deviating from the preset standard gravity center based on the pressure data signals collected by the first pressure acquisition unit, the control unit adjusts the deflection angle of the chair back of the wheelchair, namely, the chair back of the wheelchair deflects towards the direction opposite to the downhill (backwards relative to the user), so that the position of the real-time gravity center of the user relative to the preset standard gravity center moves backwards and downwards. When the pressure data signal acquired by the first pressure acquisition unit reaches the preset matching degree of the pressure data signal acquired by the first pressure acquisition unit when the pressure data signal reaches the preset standard gravity center, the control unit stops adjusting the deflection angle of the chair back of the wheelchair. Preferably, the predetermined degree of matching is 90% or more.

According to a preferred embodiment, the data acquisition module further comprises a plurality of second pressure acquisition units arranged on a back chair of the wheelchair. The control unit responds to a comparison result of a real-time gravity center of a wheelchair user obtained after the data processing module analyzes and processes the data signals acquired by the data acquisition module and a preset standard gravity center, and adjusts the chair back of the wheelchair. The data processing module analyzes the pressure data signal acquired by the first pressure acquisition unit in the data acquisition module to obtain the real-time gravity center of the wheelchair user. The control unit adjusts the deflection angle of the chair back of the wheelchair based on the comparison result of the pressure data signals acquired by the second pressure acquisition unit when the data processing module is at the real-time center of gravity and the pressure data signals acquired by the second pressure acquisition unit when the data processing module is at the standard center of gravity until the pressure data signals acquired by the second pressure acquisition unit and the pressure signals acquired by the second pressure acquisition unit when the data processing module is at the standard center of gravity reach a preset matching degree. Specifically, the preset standard center of gravity is the center of gravity of a wheelchair user sitting on the wheelchair in a normal posture, the back of the user is tightly attached to the backrest of the wheelchair, and the pressure data signal acquired by the second pressure acquisition unit arranged on the backrest of the wheelchair corresponds to the pressure of the user on the backrest of the wheelchair at the preset standard center of gravity. Preferably, the driving module controls the deflection of the chair back through a driving motor arranged on the chair back. The preset standard center of gravity can be reset. For example, by adjusting the inclination angle of the backrest of the wheelchair, a preset standard center of gravity state is set when the user feels the most comfortable deflection angle of the backrest, the center of gravity formed by the user at this time is the preset standard center of gravity, and the pressure generated by the back of the user on the backrest of the wheelchair at this time corresponds to the pressure data signal collected by the second pressure acquisition unit when the preset standard center of gravity is reached. Specifically, when the wheelchair is always operated on a horizontal ground, the position of the center of gravity of the user does not change, and the backrest of the wheelchair is always kept in a state of a preset standard center of gravity. When a user sits on the wheelchair and passes through the non-horizontal ground, the real-time gravity center of the user on the wheelchair is changed due to the fact that the inclination angle of the wheelchair is changed, and the gravity center position at the moment can be obtained through analysis of a pressure data signal acquired by the data processing module based on the first pressure acquisition unit arranged on the seat of the wheelchair. When the wheelchair is used for ascending, the wheelchair is lifted relative to the advancing direction, and the gravity center position of the user moves backwards and downwards relative to the preset standard gravity center position, so that the user is enabled to generate larger acting force on the chair back of the wheelchair, and the pressure data signal acquired by the second pressure acquisition unit is increased. In this state, if the slope is large, the wheelchair is liable to fall backward, which may cause danger to the user. When the data processing module obtains the real-time gravity center of a user of the wheelchair and the preset standard gravity center to deviate from the preset matching degree based on the analysis of the pressure data signal acquired by the first pressure acquisition unit, the deflection angle of the chair back of the wheelchair is adjusted through the control unit, namely, the chair back of the wheelchair deflects towards the direction of an uphill slope, so that the position of the real-time gravity center of the user relative to the preset standard gravity center moves towards the front and upwards, the upper part of the body of the user also tilts forwards relative to the direction of the uphill slope, and the pressure of the back of the user to the chair back of the wheelchair is also gradually reduced. When the pressure data signal acquired by the second pressure acquisition unit reaches the preset matching degree with the preset standard gravity center, the control unit stops adjusting the deflection angle of the chair back of the wheelchair. When the wheelchair is used for going downhill, the wheelchair is lowered relative to the advancing direction, and the gravity center position of the user moves forwards and upwards relative to the preset standard gravity center position, so that the back of the user is enabled to generate smaller acting force relative to the chair back of the wheelchair, and the pressure data signal acquired by the second pressure acquisition unit is reduced. In this state, if the gradient is large, the wheelchair is liable to tip forward, which is dangerous to the user. When the data processing module analyzes and obtains the preset matching degree of the real-time gravity center of the user of the wheelchair and the preset standard gravity center based on the pressure data signal acquired by the first pressure acquisition unit, the control unit adjusts the deflection angle of the chair back of the wheelchair, namely, the chair back of the wheelchair deflects towards the direction opposite to the downhill (backwards relative to the user), so that the position of the real-time gravity center of the user relative to the preset standard gravity center moves backwards and downwards, at the moment, the upper part of the body of the user also backwards relative to the downhill direction, and the pressure of the back of the user on the wheelchair is gradually increased. When the pressure data signal acquired by the second pressure acquisition unit reaches the preset matching degree with the preset standard gravity center, the control unit stops adjusting the deflection angle of the chair back of the wheelchair. Preferably, the predetermined degree of matching is 90% or more. Through the process, the real-time adjustment of the real-time center of gravity of the wheelchair user can be realized, so that the wheelchair user can adapt to different traveling road surfaces, and the user can have more comfortable use experience on the premise of ensuring the traveling safety of the user.

According to a preferred embodiment, the control unit adjusts the deflection angle of the backrest of the wheelchair on the basis of the result of a comparison of an average pressure data signal, which is obtained by averaging the pressure data signals acquired by the second pressure acquisition unit at the time of the real-time center of gravity, with the average pressure data signal acquired by the second pressure acquisition unit at the time of the standard center of gravity by the data processing module, until the pressure data signals acquired by the second pressure acquisition unit and the pressure signals acquired by the second pressure acquisition unit at the time of the standard center of gravity reach a predetermined degree of matching. Preferably, the second pressure acquisition units are arranged in an array on a backrest of the wheelchair. For example, the second pressure acquisition units can be 8 pressure sensors, and are arranged on the chair back of the wheelchair in two rows and four rows, and when a user sits on the wheelchair, the second acquisition modules are uniformly distributed on two sides of the spine of the user, so that the acquisition of pressure data signals of the back pressure action area is realized. When the user uses the wheelchair, due to different sitting postures, the pressure generated by the back of the user to each part of the chair back of the wheelchair is different, and in order to more accurately show the real size of the pressure generated by the back of the user to the chair back of the wheelchair, the average value analysis processing is carried out on the pressure data signals collected by all the second pressure acquisition units so as to reflect the general level of the pressure generated by the back of the user to the chair back. The accuracy of the pressure data signals acquired by the second pressure acquisition unit after the average processing is in direct proportion to the number of the set second pressure acquisition units, that is, when the number of the second pressure acquisition units arranged on the chair back is more, the pressure data signals after the average processing is performed on the acquired pressure data signals are closer to the actual force of the user on the whole chair back.

According to a preferred embodiment, the data storage module is configured to store account information of the user, preset standard data signals and collected data signals, wherein the collected data signals include weight data signals of the user collected by the data collection module and weight data signals analyzed and processed by the data processing module according to the data signals collected by the data collection module. Specifically, the account information of the user can be stored in a mode of being input into the data storage module in advance, and when the user uses the wheelchair, the user can select and associate the corresponding account information stored in the data storage module, so that the subsequent data signals collected by the data collection module and the weight data signals analyzed and processed by the data processing module according to the data signals collected by the data collection module are stored under the associated account information. Preferably, the account information can be displayed and called through the data display module.

According to a preferred embodiment, the data acquisition module further comprises a foot length measuring module, the foot length measuring module is configured to measure the foot length of the person to be measured and send the foot length data to the data processing module, the data processing module is configured to compare the received foot length data with preset foot length data in the storage module, and the data processing module responds to a result of successful comparison and sends the weight data signal of the user to account information of the corresponding user. After the weight data of the user is obtained, the weight data of the user can be sent to the data display module and the mobile terminal, and the weight of the user can be displayed by the mobile terminal to be checked by a holder of the mobile terminal, such as medical staff and/or family members of the user. The mobile terminal can be a mobile phone, a tablet, a remote controller and the like. The following functions can be realized through the mobile terminal: setting specific contents of account information, such as name, age and the like; the foot length measuring module is turned on or off by selecting the working mode of single-foot measurement or double-foot measurement. Preferably, the data signal acquired by the data acquisition module interacts with the processing module and the mobile terminal through the communication module.

According to a preferred embodiment, the data processing module analyzes and processes the weight data signals collected by the data collection module based on the time series, and draws continuous real-time gravity center linear change results to be sent to the data display module. The weight change in one day can reach 2-3Kg due to the consumption process of the human body during eating and metabolism. The weight data of the user are detected based on the time sequence and are reflected on the data display module in a continuous linear change process, so that the user can know the change condition of the weight more intuitively.

According to a preferred embodiment, the preset standard barycenter is set to a corresponding continuous linear variation based on the real-time barycenter linear variation result. Because the normal weight change of the human body in one day has a large fluctuation degree, if a fixed preset standard gravity center is used, when the weight of the human body changes suddenly under normal conditions, such as before and after eating and/or before and after metabolism, the result obtained by analyzing the real-time weight data acquired by the data acquisition module by the data processing module easily exceeds the error range of the weight data corresponding to the preset standard gravity center, so that wrong weight mutation information is issued under normal conditions, and the detection result of the weight of the user is misjudged. Through setting up predetermined standard focus to be follow-up linear variation relation with real-time focus, also make the error range become continuous around predetermined standard focus be the regional value of fixed fluctuation degree change to make the comparison result of weight data more accurate.

According to a preferred embodiment, the seat of the wheelchair collects the stress values of all points of a user in a sitting posture through 6 pressure sensors, and voltage signals corresponding to the pressure values are sent to the data storage module through the A/D converter to be stored. The data processing module calculates real-time barycentric position coordinates according to the collected pressure, and stores the user barycentric coordinate sampling data in a period of time into the memory of the data storage module. Preferably, the power supply part of the wheelchair is powered by a direct-current 24V storage battery, and the wheelchair can be continuously driven for 3-4 hours after being fully charged.

Example 2

This embodiment may be a further improvement and/or a supplement to embodiment 1, and repeated contents are not described again. The preferred embodiments of the present invention are described in whole and/or in part in the context of other embodiments, which can supplement the present embodiment, without resulting in conflict or inconsistency.

The present embodiment provides a wheelchair for weight measurement comprising at least a seat back 1, a seat 2, front wheels 3 and rear wheels 4. The wheelchair includes a plurality of data acquisition modules. The data acquisition module comprises at least a first pressure acquisition unit 5 and a second pressure acquisition unit 6. The seat 2 is provided with a plurality of first pressure acquisition units 5 for acquiring pressure data signals. The chair back 1 is provided with a plurality of second pressure acquisition units 6 for acquiring pressure data signals. The first pressure acquiring unit 5 and the second pressure acquiring unit 6 are arranged in an array on the seat 2 and the seatback 1, respectively. One side of the wheelchair is provided with a data display 10 which displays relevant data acquired by the data acquisition module after the data acquisition module analyzes and processes the data signals based on the data processing module of the wheelchair. The wheelchair is arranged to enable measurement of the wheelchair user's real-time weight based on the weight data results measured by the data acquisition module and displayed on the data display 10. Preferably, the data display 10 may be a touch display screen. Wherein, the data processing module is set up and is used for comparing the measuring result of the real-time weight of the wheelchair user that data acquisition module measured with predetermined standard weight, when the error range of the real-time weight that obtains after data processing module analysis processes according to measured weight data signal and predetermined standard weight is greater than the threshold value of settlement, update real-time weight to data display module in order to remind the user to notice self gesture change, thereby ensure that the user can in time know the weight situation of change on the wheelchair, avoid leading to the condition of the wrong state of an illness to take place because of ignoring the situation of the weight situation of change. The adjustment of the body weight detection sensitivity of the wheelchair can be realized by adjusting the set threshold value, so that the user can be reminded only when the body weight changes to a certain degree, and the reminding process of the body weight change is convenient to control. For example, the set threshold may be 5%. Preferably, the set threshold value may be adjustable. For example, there may be a large change in the weight of the user before and after eating food, and a large set threshold may be set to reduce the sensitivity of the wheelchair to send weight change information.

According to a preferred embodiment, the wheelchair further comprises a footboard 7. The second end of the footrest 7 is capable of reciprocating in the direction of the second end of the footrest 7 in the axial direction of the footrest 7. When the axial direction of the pedal 7 is perpendicular to the ground, the second end of the pedal 7 completely abuts against the plane of the wheelchair. Preferably, the first end of the footrest 7 is connected to the side of the seat 2 by means of an articulated connection. The second end of the pedal 7 is provided with a telescoping mechanism. The telescopic mechanism includes at least a connecting rod 8 capable of reciprocating in the axial direction of the foot board 7. The connecting rod 8 is sleeved with a telescopic spring 9 which can completely retract the connecting rod 8 into the pedal 7. When the second end of the footboard 7 is not acted upon by an external force, the extension spring 9 retracts the second end of the footboard 7 at least completely into the body of the footboard 7 in the axial direction of the connecting rod 8. When the second end of the pedal plate 7 is subjected to an external force at least larger than the elastic force of the extension spring 9, the connecting rod 8 extends in the direction of the second end of the pedal plate 7 in the axial direction of the pedal plate 7. When the pedal plate 7 is vertical to the ground, the telescopic mechanism can at least enable the second end of the pedal plate 7 to be completely abutted to the plane of the wheelchair. By arranging the telescopic mechanism on the pedal 7, when a user of the wheelchair stands up from the wheelchair, the pedal 7 can be completely clung to the ground without additionally moving feet out of the current area of the wheelchair, so that the user can conveniently train to stand up and sit down through the wheelchair; meanwhile, the telescopic mechanism can generate feedback acting force on the feet of the user, so that the training effect on the feet of the user is improved.

According to a preferred embodiment, the foot pedal 7 is further provided with a third pressure acquisition unit for acquiring weight data. And the control unit responds to the pressure data signal acquired by the third pressure acquisition unit and exceeds a preset threshold value so as to adjust the deflection angle of the chair back 1 and the chair 2 until the chair back 1 and the chair 2 are relatively parallel. Specifically, the control unit pushes the seat 2 to rotate around the hinge shaft of the pedal 7 and the seat 2 by controlling the cylinder connected to the seat 2. Preferably, the predetermined threshold is at least greater than the average of the pressure data signals generated by the user on the foot pedal 7 while sitting in the wheelchair for a longer continuous time. For example, the preset threshold is at least larger than the arithmetic mean of the pressure data signals collected by the third pressure obtaining unit when the user sits on the wheelchair for 10 minutes. When the user rises from the wheelchair, the foot of the user contacting the foot pedal 7 exerts an increasing force on the foot pedal 7. When the pressure data signal acquired by the third pressure acquiring unit is larger than the acting force of the user on the pedal 7 on the wheelchair in a sitting posture state, the user is judged to start to get up. At this moment, the deflection angles of the chair backs 1 and the chair seats 2 are adjusted through the control unit, so that the chair backs 1 and the chair seats 2 move along with the user, the chair backs 1 are matched with the running tracks of the backs of the user in the rising process, the chair seats 2 are matched with the running tracks of the buttocks of the user in the rising process, on one hand, the assisting power and the support are provided for the user in the rising process, on the other hand, the safety protection is provided for the user, and the situation that the user is in danger due to accidental falling is prevented from occurring. Meanwhile, the third pressure acquisition unit used for acquiring weight data is arranged on the pedal plate, so that the weight of the user is measured in a standing condition.

According to a preferred embodiment, the wheelchair is further provided with a drive system. The driving system comprises wheels, a storage battery and a servo system. Comprises two front wheels 4 and two rear wheels 5. According to the demand calculation of a user with 99 percent of weight (the weight is 83KG), the storage battery is an energy storage type lithium battery with 24V and the capacity of more than 90000 milliampere hours, the storage battery comprises a charger interface and a power supply output interface, household electricity (220V) is used for charging, the lithium battery is flatly paved below a seat, the design value of the endurance mileage is more than 30 kilometers, and the highest advancing speed is 6.0 km/h. The servo system comprises a motor driver and a motor.

According to a preferred embodiment, be provided with the display device who is used for showing weighing device weighing result on this wheelchair, make things convenient for the person of taking to look over weighing result, display device can adopt structures commonly used such as display screen, also can directly integrate on touch panel, and in the practical application, weighing device also can supply to look over on the receiving arrangement commonly used such as cell-phone with data transmission through bluetooth etc..

According to a preferred embodiment, the wheelchair further comprises a positioning module. The positioning module can be a conventional GPS positioning module, a Beidou positioning module and the like. The positioning module can be in wireless communication with the mobile terminal, so that the wheelchair can be positioned and navigated, and the travel requirements of users are facilitated. Meanwhile, for medical staff holding the mobile terminal or family members of the user and the like, the current position of the wheelchair user can be determined through information fed back by the positioning module arranged on the wheelchair, so that the family members or the medical staff can find the user quickly.

Example 3

This embodiment may be a further improvement and/or a supplement to

embodiment

1 or 2, and repeated contents are not described again. The preferred embodiments of the present invention are described in whole or in part with reference to the following examples, which are intended to supplement the present invention and are not intended to be limiting.

The embodiment provides a weight measuring method for a wheelchair.

S1: measurement under standard posture to obtain preset standard gravity center (x)₀，y₀，z₀) Standard weight of₀The measurement values are acquired with the upper and/or lower limbs of the person to be measured fully free, in which case a standard center of gravity (x) is preset₀，y₀，z₀) On the installation axis of the weight measuring module, the standard weight G₀Approaching incremental value.

S2: measurement at any attitude to obtain real-time center of gravity (x)_t，y_t，z_t) Real time weight G of_tThe posture of the person to be measured at this time may be a comfortable posture thereof.

S3: determining a predetermined standard center of gravity (x)₀，y₀，z₀) And real-time center of gravity (x)_t，y_t，z_t) Value of position change (Δ x) therebetween_t0，△y_t0，△z_t0) Fitting the standard weight G in the case of at least 5 or more sets of data₀And real time weight G_tDifference Δ G between_toThe relationship between them, i.e. based on the value of the change in position (Δ x)_t0，△y_t0，△z_t0) Determination of the Standard weight G₀And real time weight G_tA reduction factor in between. After fitting 100 sets of data, standard weight G₀And real time weight G_tThe reduction coefficient between basic and delta z_t0Is related to Δ x_t0，△y_t0Are substantially irrelevant. The data fitting can be performed by simple least square fitting or artificial intelligence. The accuracy of the reduction coefficient of the least square fitting is poor, but the required data volume is small, so that the method is suitable for early measurement of a user. The reduction coefficient accuracy of the artificial intelligence fitting algorithm is good, but the required data volume is large, so that the method is suitable for the condition that the data samples are large. By monitoring the center of gravity, on the one hand, the wheelchair is prevented from being caused by sudden change of the center of gravity of the person to be measuredOut of balance, and on the other hand: the calibration of the center of gravity is performed at least twice in order to maintain the accuracy of the measurement during the measurement as much as possible. In at least two gravity center measurements, at least one weight measurement is of the amount of the person to be measured, the patient's gravity center is almost at the moment, and the measured weight is closer to the true value. However, for most wheelchair users, if the upper limb does not hold the wheelchair hand frame or the lower limb does not fit the pedal plate, the wheelchair is easy to fall down, but when the upper limb holds the wheelchair hand frame or the lower limb fits the pedal plate, the pressure acting on the sensing element of the weight measuring module is changed due to the deviation of the gravity center and the like, so that the measurement distortion is caused, and therefore the invention relates the standard weight and the real-time weight by setting a plurality of groups of measurements and reducing coefficients so as to solve the safe and accurate relation during the weighing of the wheelchair. The inventors of the present invention have conducted long-term research and study on wheelchair measurement, and have considered that: the various influencing factors (e.g. jerking of the stroke patient during the measurement), which relate the weight measurer purely from the point of the centre of gravity, still have errors. The invention can reflect the weight change of the patient in a certain period from the relative measurement angle, thereby reducing the influence of system errors on the measurement result.

Example 4

This embodiment may be a further improvement and/or a supplement to one or a combination of

embodiments

1, 2, and 3, and repeated details are not repeated. The preferred embodiments of the present invention are described in whole and/or in part in the context of other embodiments, which can supplement the present embodiment, without resulting in conflict or inconsistency.

For a patient with unchanged movement, a body fat measuring element is arranged on the weight measuring module to meet the monitoring requirement of measuring the weight, the body fat and the muscle content. The body fat measuring element consists of a body fat negative electrode, a body fat positive electrode and a body fat measuring circuit. Preferably, the body fat measuring element can be the body fat measuring element or the body fat meter in patent CN 203262765U. The body fat measuring circuit is used for receiving the body impedance value and calculating the corresponding body fat ratio according to the body impedance value. By detecting the body fat condition of the user, the overall health condition of the user can be comprehensively judged by combining the change condition of the weight data.

In this embodiment, the data acquisition module, the data processing module and the data display module are integrated into a data terminal and are wirelessly connected to the gravity measurement unit. One is as follows: by adopting the technical scheme of the data line, the data line can bind the walking of the wheelchair in the walking process of the wheelchair, so that certain obstruction is added to the walking of the wheelchair; (ii) a The second step is as follows: due to no data line 'constraint', the gravity measurement unit has convenience and quickness in installation, and an additional data line arrangement structure is not required to be added to the wheelchair; thirdly, the data terminal can be handheld by using a wireless connection mode, and the patient can know the health data in real time. The invention can develop the smart phone APP, reduce the host computer, reduce the screen, reduce the battery size, keep the mainboard sensor; the smart phone is used as an operation end, the weight measurement method is set, meanwhile, the app background can push a set of corresponding measurement methods, the app background can also combine data such as fat and muscle mass to prompt a corresponding rehabilitation training mode or a training mode for maintaining health or slowing down aging and a use method of equipment, and data are recorded and uploaded to the cloud, so that a doctor can feed back the training condition of a patient conveniently and can use the training condition for scientific research.

Preferably, the data terminal and the monitoring cloud can establish communication connection. The monitoring cloud can receive the results of body fat, weight and muscle content fed back by the data terminal, and medical staff can perform professional evaluation on the measurement results in a mode of inquiring the monitoring cloud and then feed back the improved rehabilitation plan or rehabilitation guidance to the data terminal for a person waiting for rehabilitation to read. The data terminal and the monitoring cloud can also establish connection of videos, audios and the like, so that the two parties can inquire in a cloud mode. Therefore, the person to be recovered is not easy to frequently rush to the hospital for rehabilitation training, and doctors cannot frequently visit the home, so that cloud rehabilitation is provided to keep effective communication between the medical care and the person to be recovered; during a serious epidemic situation, a person to be recovered does not need to go to a hospital, so that the working intensity of medical personnel is reduced, and the risk of cross infection of the two parties is also reduced.

Preferably, the training result displayed by the data terminal and the measurement result displayed by the monitoring cloud terminal may be different. Specifically, the training result displayed by the data terminal is a relative value, and the training result displayed by the monitoring cloud may be a relative value and an absolute value. The relative values refer to: the rate of change of an assessment indicator over time, such as the rate of change of the compliance rate over time, such as the rate of change of body fat over time. And the absolute values refer to: the absolute value of an evaluation index in the period of time, such as the standard reaching rate. For this reason, the system provided by the invention has the following advantages, mainly different from the prior art, especially for the elderly population: 1. the system adopts the relative value to evaluate the rehabilitation state of the person to be rehabilitated, the relative value is used for describing the change trend of the health state of the person to be rehabilitated, the change speed of the health state of the person to be rehabilitated can be reflected in a certain time period, and the data terminal and the monitoring cloud can simultaneously display the change speed; 2. the relative value is derived from the past rehabilitation data of the person to be rehabilitated, so that the relative value can be presented to the person to be rehabilitated in a non-quantitative manner, like the solid closed loop, the more round the solid closed loop represents that the rehabilitation data of the person to be rehabilitated is larger relative to the previous rehabilitation data of the person, only the person to be rehabilitated can qualitatively know the rehabilitation state change of the person through the roundness of the closed loop, because the closed loop presents approximate circle under the correct rehabilitation guidance, the method is more favorable for the person to be rehabilitated to accept the self health state, conforms to the mind state of the Chinese people for the 'satisfactory' pursuit, is favorable for the person to be rehabilitated to enhance the rehabilitation confidence, the circle has satisfactory meaning in the Chinese traditional culture, however, a large number of reports in modern psychological monographs indicate that most people have a subconscious idea of pursuing satisfaction, which can prompt people to perform specific operations spontaneously without thinking. Therefore, the round + color (especially red) mode is used for promoting the rehabilitation person to keep a healthy living state, and the theoretical basis of positive psychology and nursing aspects is provided for the rehabilitation of the rehabilitation person. The invention skillfully combines red and round of traditional culture to cultivate the user to form good rehabilitation habit, is more beneficial to prompting the user to adopt better life style from psychological aspect, and greatly reduces the work burden of the user and the staff. 3. The monitoring cloud compares the activity data in the data terminal, so that on one hand, the operation amount of the local terminal is reduced, the miniaturization and lightweight design of the data terminal is facilitated, and the motion parameters are efficiently, energy-saving and accurately acquired; on the other hand, the monitoring cloud terminal is used as a top-level data processing terminal, has the management processing capacity for similar rehabilitation data, can read similar rehabilitation suggestions in the expert database by combining relative values, and pushes the similar rehabilitation suggestions to the data terminal.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not intended to be limiting on the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. A weight measuring system installed on a wheelchair at least comprises a weight measuring unit arranged on the wheelchair, and is characterized in that the weight measuring unit at least comprises a data acquisition module, a data display module and a data processing module;

the system is arranged for realizing the measurement of the real-time gravity center of the wheelchair user based on the weight data result measured by the weight measuring unit, and adjusting the real-time gravity center to the position of a preset standard gravity center based on the measurement result of the real-time gravity center of the wheelchair user measured by the weight measuring unit, so as to ensure that the user is always in a preset comfortable state on the wheelchair;

the data processing module is used for comparing a real-time gravity center obtained by analyzing the weight data signals measured by the data acquisition module with a preset standard gravity center, and updating the real-time gravity center to the data display module to remind a user of paying attention to posture change of the user when an error range of the real-time gravity center obtained by analyzing and processing the measured weight data signals by the data processing module and the preset standard gravity center is larger than a set threshold value;

the data acquisition module also comprises a control unit for adjusting the chair back of the wheelchair;

the control unit responds to a comparison result of a real-time gravity center of a wheelchair user obtained after the data processing module analyzes and processes the data signals acquired by the data acquisition module and a preset standard gravity center, and adjusts the chair back of the wheelchair;

the data processing module analyzes a pressure data signal acquired by a first pressure acquisition unit in the data acquisition module to obtain the real-time gravity center of a wheelchair user;

the data acquisition module also comprises a plurality of second pressure acquisition units arranged on a back chair of the wheelchair;

the control unit adjusts the deflection angle of the chair back of the wheelchair based on the comparison result of the average pressure data signal obtained by performing mean calculation on the pressure data signal acquired by the second pressure acquisition unit at the real-time center of gravity and the average pressure data signal acquired by the second pressure acquisition unit at the standard center of gravity by the data processing module until the pressure data signal acquired by the second pressure acquisition unit and the pressure signal acquired by the second pressure acquisition unit at the standard center of gravity reach a preset matching degree.

2. The wheelchair-mounted weight measuring system of claim 1, wherein the data storage module is configured to store account information of the user, a predetermined standard data signal and the collected data signal, and the collected data signal comprises the weight data signal of the user collected by the data collection module and the weight data signal analyzed and processed by the data processing module according to the data signal collected by the data collection module.

3. The wheelchair-mounted weight measuring system of claim 2, wherein the data acquisition module further comprises a foot length measuring module configured to measure the foot length of the person under test and send the foot length data to the data processing module, the data processing module is configured to compare the received foot length data with preset foot length data in the storage module, and the data processing module sends the weight data signal of the user to the account information of the corresponding user in response to a successful comparison result.

4. The wheelchair-mounted weight measuring system according to claim 3, wherein the data processing module analyzes and processes the weight data signals collected by the data collecting module based on a time series, and draws a continuous linear variation result to be transmitted to the data display module.

5. The wheelchair-mounted weight measuring system of claim 4, wherein the predetermined standard center of gravity is set to a corresponding continuous linear change based on the real-time center of gravity linear change result.

6. A wheelchair for measuring weight is characterized by at least comprising a data acquisition module, a data display (10), a data storage module and a data processing module;

the wheelchair is arranged to enable measurement of the real-time weight of the wheelchair user based on the weight data results measured by the data acquisition module and displayed on the data display (10);

the data processing module is used for comparing a measurement result of the real-time weight of the wheelchair user measured by the data acquisition module with a preset standard weight, and updating the real-time weight to the data display module to remind the user of paying attention to the posture change of the user when the error range of the real-time weight obtained after the real-time weight is analyzed and processed by the data processing module according to the measured weight data signal and the preset standard weight is larger than a set threshold value;

the data processing module analyzes a pressure data signal acquired by a first pressure acquisition unit in the data acquisition module to obtain the real-time gravity center of the wheelchair user;

the control unit is used for adjusting the deflection angle of the chair back of the wheelchair according to the comparison result of the average pressure data signal obtained by performing mean calculation on the pressure data signal acquired by the second pressure acquisition unit during the real-time gravity center and the average pressure data signal acquired by the second pressure acquisition unit during the standard gravity center by the data processing module until the pressure data signal acquired by the second pressure acquisition unit and the pressure signal acquired by the second pressure acquisition unit during the standard gravity center reach the preset matching degree.

7. The wheelchair according to claim 6, further comprising a footboard (7), a second end of the footboard (7) being capable of reciprocating in a direction of the second end of the footboard (7) in an axial direction of the footboard (7);

when the axial direction of the pedal plate (7) is vertical to the ground, the second end of the pedal plate (7) completely abuts against the plane of the wheelchair.