CN116271790A - Grip strength detection sensitivity adjusting method, grip strength detection circuit and handle - Google Patents

Grip strength detection sensitivity adjusting method, grip strength detection circuit and handle Download PDF

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Publication number
CN116271790A
CN116271790A CN202310279379.3A CN202310279379A CN116271790A CN 116271790 A CN116271790 A CN 116271790A CN 202310279379 A CN202310279379 A CN 202310279379A CN 116271790 A CN116271790 A CN 116271790A
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China
Prior art keywords
grip strength
module
operational amplification
amplification
strength detection
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CN202310279379.3A
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Chinese (zh)
Inventor
张西锋
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Goertek Inc
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Goertek Inc
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Priority to CN202310279379.3A priority Critical patent/CN116271790A/en
Publication of CN116271790A publication Critical patent/CN116271790A/en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F13/00—Video games, i.e. games using an electronically generated display having two or more dimensions
    • A63F13/20—Input arrangements for video game devices
    • A63F13/22—Setup operations, e.g. calibration, key configuration or button assignment
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F13/00—Video games, i.e. games using an electronically generated display having two or more dimensions
    • A63F13/20—Input arrangements for video game devices
    • A63F13/21—Input arrangements for video game devices characterised by their sensors, purposes or types
    • A63F13/218—Input arrangements for video game devices characterised by their sensors, purposes or types using pressure sensors, e.g. generating a signal proportional to the pressure applied by the player
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63F—CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
    • A63F13/00—Video games, i.e. games using an electronically generated display having two or more dimensions
    • A63F13/20—Input arrangements for video game devices
    • A63F13/24—Constructional details thereof, e.g. game controllers with detachable joystick handles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/1365—Matching; Classification

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

The invention discloses a grip strength detection sensitivity adjusting method, a grip strength detection circuit and a handle, wherein the grip strength detection circuit comprises a pressure-sensitive sensor module and an operational amplification module, the pressure-sensitive sensor module is used for detecting the magnitude of grip strength and outputting a corresponding first voltage signal to the operational amplification module so that the operational amplification module can carry out operational amplification on the first voltage signal and then output a second voltage signal, and the grip strength detection sensitivity adjusting method comprises the following steps: acquiring a user category; and selecting a corresponding sensitivity adjustment mode according to the user category, and adjusting the amplification gain multiple of the operational amplification module according to the grip strength obtained in real time in the selected sensitivity adjustment mode. The invention can improve the accuracy of the grip strength detection.

Description

Grip strength detection sensitivity adjusting method, grip strength detection circuit and handle
Technical Field
The invention relates to the technical field of handle interaction, in particular to a grip strength detection sensitivity adjusting method, a grip strength detection circuit and a handle.
Background
The functions of the game handle are more and more abundant, the interactive experience of a user in a game scene is more and more important, and the handle is required to detect more human body information in support of the interaction, wherein the strength of the human hand to grasp the handle is an important human body information input source. At present, a resistance type pressure-sensitive sensor is generally used for detecting the grip strength of a handle, but the linearity of the change of acting force and resistance value of the sensor is poor, and when the acting force exceeds a certain value, the detection sensitivity of the sensor is lower and lower, so that the detection sensitivity of the sensor is not matched with the actual grip strength, and the accuracy of the grip strength detection of the handle is affected. Meanwhile, the detection sensitivity of the handle setting is not suitable for a part of the population due to individual differences of users, such as grip strength differences between men and women.
Disclosure of Invention
The invention mainly aims to provide a grip strength detection sensitivity adjusting method, which aims to improve accuracy of grip strength detection.
In order to achieve the above object, the present invention provides a grip strength detection sensitivity adjustment method, comprising:
acquiring a user category;
And selecting a corresponding sensitivity adjustment mode according to the user category, and adjusting the amplification gain multiple of the operational amplification module according to the grip strength obtained in real time in the selected sensitivity adjustment mode.
Optionally, the user categories include a first user category and a second user category;
the step of obtaining the user category specifically includes:
the operational amplification module is controlled to carry out operational amplification according to the initial amplification gain factor, and the test grasping force of a user is determined according to the acquired second voltage signal;
when the test grip strength is greater than a preset strength threshold, determining the user category as a first user category;
and when the test grip strength is not greater than the preset strength threshold, determining the user category as a second user category.
Optionally, the user categories include a first user category and a second user category;
the sensitivity adjustment modes comprise a first adjustment mode corresponding to a first user category and a second adjustment mode corresponding to a second user; wherein,,
the first adjusting mode is used for adjusting the amplification gain factor of the operation amplification module based on the mapping relation among the first user type, the grasping force generated when the user grasps and the amplification gain factor of the operation amplification module;
And the second adjusting mode is used for adjusting the amplification gain factor of the operation amplification module based on the mapping relation among the second user category, the grasping force generated when the user grasps and the amplification gain factor of the operation amplification module.
Optionally, in the selected sensitivity adjustment mode, the step of adjusting the amplification gain of the operational amplification module according to the real-time grip strength includes:
acquiring a second voltage signal in real time, and determining the grasping force generated when a user grasps according to the second voltage signal;
and determining the gain multiple to be amplified of the operational amplification module according to the grip strength determined in real time, and adjusting the gain multiple to be amplified of the operational amplification module to the determined gain multiple.
Optionally, in the selected sensitivity adjustment mode, the step of adjusting the amplification gain of the operational amplification module according to the real-time grip strength further includes:
acquiring a second voltage signal according to real time, and matching the grasping force generated when the user grasps with a grasping force detection interval according to the second voltage signal;
when the grip strength obtained in real time is matched with the grip strength detection interval, the amplification gain multiple of the operational amplification module is adjusted to the initial amplification gain multiple, and the grip strength is obtained again to adjust the amplification gain multiple of the operational amplification module.
Optionally, the step of determining the amplification gain multiple of the operational amplification module according to the grip strength determined in real time specifically includes:
matching the grip strength determined in real time with a plurality of grip strength intervals;
and selecting the amplification gain multiple corresponding to the matched strength interval according to the mapping relation between the strength interval and the amplification gain multiple.
Optionally, the step of determining the amplification gain multiple of the operational amplification module according to the grip strength determined in real time specifically includes:
and selecting the amplification gain factor matched with the grip strength according to the grip strength determined in real time and the mapping relation between the grip strength and the amplification gain factor.
The invention also provides a grip strength detection circuit, which comprises:
the pressure-sensitive sensor module is used for detecting the magnitude of the gripping strength and outputting a corresponding first voltage signal;
the input end of the operational amplification module is connected with the output end of the pressure-sensitive sensor module, and the operational amplification module is used for outputting a second voltage signal after performing operational amplification on the first voltage signal;
the receiving end of the processor module is connected with the output end of the operational amplification module, a sensitivity control program is stored in the processor module, and the grasping force detection sensitivity adjustment method is realized when the sensitivity control program is executed by the controller.
Optionally, the pressure sensitive sensor module includes:
the resistance type pressure-sensitive sensor is used for detecting the magnitude of the gripping strength and outputting a corresponding resistance value;
the input end of the resistor voltage dividing circuit is connected with the output end of the resistor type pressure-sensitive sensor, and the resistor voltage dividing circuit is used for outputting a corresponding first voltage signal to the operational amplification module according to the resistance value of the resistor type pressure-sensitive sensor.
Optionally, the processor module includes:
the receiving end of the microprocessor is connected with the output end of the operational amplification module, a sensitivity control program is stored in the microprocessor, and the grasping force detection sensitivity adjustment method is realized when the sensitivity control program is executed by the microprocessor;
the control end of the gain control module is connected with the control end of the microprocessor, the control end of the gain control module is connected with the control end of the operational amplification module, and the gain control module is used for adjusting the amplification gain of the operational amplification module to the target amplification gain when receiving a gain control signal.
The invention also provides a handle which is characterized by comprising a shell, a middle frame, foam, a circuit board and the grasping power detection circuit; wherein,,
the resistor voltage dividing circuit, the operational amplification module and the processor module in the grip strength detection circuit are arranged on the circuit board;
the resistance type pressure-sensitive sensor in the grip strength detection circuit is attached to the middle frame and clamped between the shell and the middle frame, and is electrically connected with the resistance voltage dividing circuit through a connecting piece;
the foam is adhered to the resistance type pressure-sensitive sensor in the grip strength detection circuit, and is clamped between the shell and the resistance type pressure-sensitive sensor in the grip strength detection circuit.
Optionally, the handle further comprises:
the reset key is arranged on the shell, the output end of the reset key is connected with the processor module in the grip strength detection circuit, and the reset key is used for outputting a reset signal to the processor module in the grip strength detection circuit when triggered;
and the processor module is also used for controlling the operational amplification module in the grip strength detection circuit to carry out operational amplification according to the initial amplification gain multiple when the reset signal is received, so as to determine the user category according to the second voltage signal output by the operational amplification module.
According to the technical scheme, the user category of the user is obtained, so that the corresponding sensitivity adjustment mode is selected according to the user category of the user. By the arrangement, the user type can be determined, and the corresponding adjusting mode can be automatically selected according to the user type, so that the sensitivity of grip strength detection can be adapted to different user types, the grip strength detection precision of different types of users is improved, and the grip strength detection precision and universality of the handle to different types of users are further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a functional module of an embodiment of a grip strength detection circuit according to the present invention;
FIG. 2 is a flow chart illustrating an embodiment of a method for adjusting grip strength detection sensitivity according to the present invention;
FIG. 3 is a schematic diagram of a refinement flow of an embodiment of a grip strength detection sensitivity adjustment method according to the present invention;
FIG. 4 is a schematic diagram of a refinement flow chart of another embodiment of the grip strength detection sensitivity adjustment method of the present invention;
FIG. 5 is a schematic diagram of a functional module of another embodiment of the grip strength detection circuit according to the present invention;
FIG. 6 is a schematic circuit diagram of a grip strength detecting circuit according to an embodiment of the present invention;
FIG. 7 is a schematic circuit diagram of a grip strength detecting circuit according to another embodiment of the present invention;
FIG. 8 is a schematic view of an embodiment of the handle of the present invention.
Reference numerals illustrate:
reference numerals Name of the name Reference numerals Name of the name
10 Pressure-sensitive sensor module Vi First voltage
20 Operational amplifier module R0 First fixed resistor
30 Processor module R1 First resistor
11 Resistive pressure-sensitive sensor R2 Second resistor
12 Resistor voltage dividing circuit R3 Variable resistor
31 Microprocessor Vs Power supply terminal
32 Gain control module Vo Second voltage
U1 Operational amplifier chip
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
At present, a resistance type pressure-sensitive sensor is generally used for detecting the grip strength of a handle, but the linearity of the change of acting force and resistance value of the sensor is poor, and when the acting force exceeds a certain value, the detection sensitivity of the sensor is lower and lower, so that the detection sensitivity of the sensor is not matched with the actual grip strength, and the accuracy of the grip strength detection of the handle is affected. Meanwhile, the detection sensitivity of the handle setting is not suitable for a part of the population due to individual differences of users, such as grip strength differences between men and women.
In order to solve the above-mentioned problems, the present invention provides a grip strength detection sensitivity adjustment method applied in a grip strength detection circuit, the grip strength detection circuit includes a pressure sensor module and an operational amplifier module, the pressure sensor module is configured to detect a magnitude of a grip strength and output a corresponding first voltage signal to the operational amplifier module, so that the operational amplifier module performs operational amplification on the first voltage signal and then outputs a second voltage signal, and referring to fig. 1 and 2, in an embodiment, the grip strength detection sensitivity adjustment method includes:
step S100, obtaining a user category;
and step 200, selecting a corresponding sensitivity adjustment mode according to the user category, and adjusting the amplification gain of the operational amplification module according to the grip strength obtained in real time in the selected sensitivity adjustment mode.
In this embodiment, a processor for controlling the operational amplification module, such as an MCU, a DSP (Digital Signal Process, digital signal processing chip), an FPGA (Field Programmable Gate Array, programmable gate array chip), or the like, may be provided for adjusting the amplification gain of the operational amplification module, and for acquiring the voltage signal output by the operational amplification module.
Referring to fig. 1, fig. 1 is a schematic diagram of functional modules of an embodiment of a grip strength detection circuit, including a pressure-sensitive sensor module and an operational amplifier module. The pressure-sensitive sensor module is used for outputting a corresponding first voltage signal to the operational amplification module according to the magnitude of the grasping force, wherein the signal amplitude of the first voltage signal changes along with the magnitude change of the grasping force, and the pressure-sensitive sensor module can be a pressure-sensitive sensor module such as a resistance pressure-sensitive sensor module. The operational amplification module is used for performing operational amplification on the first voltage signal, generating a second voltage signal and outputting the second voltage signal. Therefore, the signal amplitude of the first voltage signal changes along with the change of the magnitude of the gripping force, and the second voltage signal is obtained by operational amplification of the first voltage signal, so that the magnitude of the detected gripping force can be determined according to the second voltage signal and the amplification factor of the operational amplification module.
It is understood that there is an individual difference between users, that is, the ranges of grip strength of different users are different, particularly, the grip strength range of a male user when using a handle is most obvious when sex is taken as a distinction, which is generally larger than the grip strength range of a female user when using a handle, and thus, when a male and female user use a handle with the same sensitivity, there may occur problems that the grip strength of a male user is detected over a range due to a high magnification gain, or the grip strength of a female user is detected insensitively due to a low magnification gain, and the like.
Therefore, in the technical scheme of the invention, the user type of the user is firstly selected and confirmed by the handle, the user type can be confirmed by means of fingerprints, sounds and the like, the user can select the user by means of keys, touch screens and the like, or the operational amplification module can be controlled to perform operational amplification according to initial amplification gain factors, and the grasping power of the user is initially detected, so that the grasping power range of the user is judged according to the grasping power of the initial detection. In a specific embodiment, the user may be prompted to grasp with the maximum force by voice, display or other means, so as to detect the maximum grasping force of the user, and determine the user category according to the maximum grasping force of the user, for example, the maximum grasping force of the male user is generally far greater than the maximum grasping force of the female user due to the difference between the male user and the female user, so that the detected maximum grasping force can be compared with the preset force threshold by setting the preset force threshold, and when the maximum grasping force is greater than the preset force threshold, the user can be considered to be the male user, whereas when the maximum grasping force is less than the preset force threshold, the user can be considered to be the female user.
After confirming the user category through the preliminary detection, a corresponding sensitivity adjustment mode may be selected according to the user category to adapt to the corresponding user category. In an embodiment, two sets of sensitivity adjustment modes are provided, adapted to a male user and a female user, respectively. It will be appreciated that the grip strength of a male user is greater and the grip strength variation will be greater when the handle is used, and therefore the sensitivity may be set relatively smaller in adapting the sensitivity adjustment mode of the male user as compared to the female user due to the greater grip strength variation of the male user. The grip strength of the female user is small, and the change of the grip strength when the handle is used is also small, so that the sensitivity can be set relatively large in the sensitivity adjustment mode for adapting the female user as compared with the male user, since the change of the grip strength of the female user is small. Wherein the operational amplification gain factor is related to the detection sensitivity, and the larger the operational amplification gain factor is, the higher the detection sensitivity of the grip strength detection circuit is. For example, the operational amplification factor of a male user may be set to three times, and other conditions may be the same, the operational amplification factor of a female user may be set to five times, and the initial amplification factor when detecting the maximum grip strength of the user may be set according to the actual situation, and the amplification factor may be set to be smaller, may be two times, three times, or the like due to the maximum grip strength. It will be appreciated that the user categories are not limited to only male and female, but may be categorized according to the actual situation and a set of corresponding sensitivity adjustment modes may be set according to the user of each category. For example, the system can be divided into three types of users, namely adult male, adult female and child, and three sets of sensitivity adjustment modes can be correspondingly set.
In addition, when the resistance type pressure-sensitive sensor is used for detecting the grip strength of the handle, the linearity of the change of the acting force and the resistance value of the sensor is poor, and the detection sensitivity of the sensor is lower and lower after the acting force exceeds a certain value, so that the detection sensitivity of the sensor is not matched with the actual grip strength, and the accuracy of the grip strength detection of the handle is affected. Therefore, after the user category is determined, when the operational amplification module is adjusted in the first sensitivity adjustment mode and the second sensitivity adjustment mode, the operational amplification gain of the operational amplification module can be subjected to closed-loop feedback adjustment according to the grip strength corresponding to the second voltage signal under the current amplification gain. For example, the grip strength may be divided into a plurality of grip strength intervals, each of which is correspondingly matched with an operational amplification factor, and since the operational amplification factor is related to the detection sensitivity of the grip strength detection circuit, the detection sensitivity of the grip strength detection circuit may be adjusted to be matched with the grip strength level, so that the accuracy of grip strength detection of the handle may be improved. The setting is so, after the grip strength exceeds a certain value, even if the change of the amplitude of the first voltage signal is more unobvious along with the change of the grip strength, the first voltage signal output by the pressure-sensitive sensor module is subjected to operational amplification through the operational amplification module, and a second voltage signal with larger signal amplitude can be generated, so that the sensitivity of grip strength detection can be improved, and the operational amplification gain of the operational amplification module is subjected to closed-loop feedback adjustment according to the magnitude of the grip strength determined by the second voltage signal, so that the operational amplification gain of the operational amplification power can always be matched with the magnitude of the grip strength, and the detection sensitivity of the bracelet grip strength detection circuit can always be matched with the magnitude of the grip strength of the handle, so that the accuracy of grip strength detection of the handle can be improved.
According to the technical scheme, the user category of the user is obtained, so that the corresponding sensitivity adjustment mode is selected according to the user category of the user. By the arrangement, the user type can be determined, and the corresponding adjusting mode can be automatically selected according to the user type, so that the sensitivity of grip strength detection can be adapted to different user types, the grip strength detection precision of different types of users is improved, and the grip strength detection precision and universality of the handle to different types of users are further improved.
Referring to FIG. 3, in one embodiment, the user categories include a first user category and a second user category;
the step of obtaining the user category specifically includes:
step S110, controlling the operational amplification module to perform operational amplification according to the initial amplification gain multiple, and determining the test grasping force of the user according to the acquired second voltage signal;
step S120, when the test grip strength is greater than a preset strength threshold, determining the user category as a first user category;
and when the test grip strength is not greater than the preset strength threshold, determining the user category as a second user category.
In a specific embodiment, the user may be prompted to grasp with the maximum force by voice, display or other means, so as to detect the maximum grasping force of the user, and determine the user category according to the maximum grasping force of the user, for example, due to the difference between the male and female users, the maximum grasping force of the male user is generally far greater than the maximum grasping force of the female user, so that the detected maximum grasping force can be compared with the preset force threshold by setting the preset force threshold, and when the test grasping force is greater than the preset force threshold, the user can be considered to be the male user, whereas when the test grasping force is less than the preset force threshold, the user can be considered to be the female user.
According to the technical scheme, the operational amplification module is controlled to perform operational amplification according to the initial amplification gain multiple so as to preliminarily detect the gripping strength of the user, and the preliminarily detected gripping strength is compared with the preset strength threshold value to determine the user type of the user, so that the corresponding sensitivity adjustment mode is selected according to the user type of the user. By the arrangement, the user category can be determined, and the corresponding adjustment strategy can be automatically selected according to the user category, so that the sensitivity of grip strength detection can be adapted to different user categories, the grip strength detection precision of different users is improved, and the grip strength detection precision and universality of the handle to the different users are further improved.
In an embodiment, the user categories include a first user category and a second user category;
the sensitivity adjustment modes comprise a first adjustment mode corresponding to a first user category and a second adjustment mode corresponding to a second user; wherein,,
the first adjusting mode is used for adjusting the amplification gain factor of the operation amplification module based on the mapping relation among the first user type, the grasping force generated when the user grasps and the amplification gain factor of the operation amplification module;
And the second adjusting mode is used for adjusting the amplification gain factor of the operation amplification module based on the mapping relation among the second user category, the grasping force generated when the user grasps and the amplification gain factor of the operation amplification module.
After confirming the user category through the preliminary detection, a corresponding sensitivity adjustment mode may be selected according to the user category to adapt to the corresponding user category. In an embodiment, two sets of sensitivity adjustment modes are provided, adapting the first user category and the second user category, e.g. male and female users, respectively. In addition, when the resistance type pressure-sensitive sensor is used for detecting the grip strength of the handle, the linearity of the change of the acting force and the resistance value of the sensor is poor, and the detection sensitivity of the sensor is lower and lower after the acting force exceeds a certain value, so that the detection sensitivity of the sensor is not matched with the actual grip strength, and the accuracy of the grip strength detection of the handle is affected. Therefore, after the user category is determined, when the operational amplification module is adjusted in the first sensitivity adjustment mode and the second sensitivity adjustment mode, the operational amplification gain of the operational amplification module can be subjected to closed-loop feedback adjustment according to the grip strength corresponding to the second voltage signal under the current amplification gain, that is, the grip strength and the operational amplification gain of the operational amplification module have a mapping relationship, and the mapping relationship between the operational amplification gain of the amplification module is different in the two sets of sensitivity adjustment modes due to the different user categories. For example, when the detected grip forces are all 5N, the amplification gain factor determined according to the mapping relation in the first sensitivity adjustment mode is three times, and the amplification gain factor determined according to the mapping relation in the second sensitivity adjustment mode is five times.
Further, in any sensitivity adjustment mode, the grip strength can be divided into a plurality of grip strength intervals, each grip strength interval is correspondingly matched with an operational amplification gain multiple, and the operational amplification gain multiple is related to the detection sensitivity of the grip strength detection circuit, so that the detection sensitivity of the grip strength detection circuit can be adjusted to be matched with the grip strength step, and the accuracy of grip strength detection of the handle can be improved. The setting is so, after the grip strength exceeds a certain value, even if the change of the amplitude of the first voltage signal is more unobvious along with the change of the grip strength, the first voltage signal output by the pressure-sensitive sensor module is subjected to operational amplification through the operational amplification module, and a second voltage signal with larger signal amplitude can be generated, so that the sensitivity of grip strength detection can be improved, and the operational amplification gain of the operational amplification module is subjected to closed-loop feedback adjustment according to the magnitude of the grip strength determined by the second voltage signal, so that the operational amplification gain of the operational amplification power can always be matched with the magnitude of the grip strength, and the detection sensitivity of the bracelet grip strength detection circuit can always be matched with the magnitude of the grip strength of the handle, so that the accuracy of grip strength detection of the handle can be improved.
Referring to fig. 4, in an embodiment, in the selected sensitivity adjustment mode, the step of adjusting the amplification factor of the operational amplification module according to the real-time grip strength includes:
step S210, acquiring a second voltage signal in real time, and determining the grasping force generated when a user grasps according to the second voltage signal;
and step 220, determining the gain multiple to be amplified of the operational amplification module according to the grip strength determined in real time, and adjusting the gain multiple to be amplified of the operational amplification module to the determined gain multiple.
Considering that when the resistance type pressure-sensitive sensor is used for detecting the grip strength of the handle, the linearity of the change of the acting force and the resistance value of the sensor is poor, and the detection sensitivity of the sensor is lower and lower after the acting force exceeds a certain value, so that the detection sensitivity of the sensor is not matched with the actual grip strength, and the accuracy of the grip strength detection of the handle is affected.
Therefore, after the user category is determined, when the user is adjusted in the first sensitivity adjustment mode, the operational amplification gain of the operational amplification module can be subjected to closed-loop feedback adjustment according to the mapping relation between the grip strength and the amplification gain of the operational amplification module. Specifically, after the magnitude of the grip strength corresponding to the current amplification factor is determined according to the second voltage signal, the amplification factor corresponding to the magnitude of the grip strength may be determined according to the mapping relationship between the magnitude of the grip strength and the amplification factor of the operational amplification module, and a corresponding gain control signal may be generated and output to the operational amplification module, so as to adjust the amplification factor of the operational amplification module to the amplification factor corresponding to the grip strength, thereby completing closed loop feedback adjustment. It can be understood that when the grip strength continues to change after the sensitivity adjustment is completed, the amplification gain multiple of the operational amplification module can be continuously adjusted again according to the mapping relationship, so that the detection sensitivity can change along with the change of the grip strength, and the detection accuracy is maintained. Similarly, the second sensitivity adjustment mode is similar to the first sensitivity adjustment mode, but the corresponding relation between the two sets of sensitivity adjustment modes is different, and when the determined gripping power is the same, the amplification gain multiple determined according to the mapping relation in the first sensitivity adjustment mode is smaller than the amplification gain multiple determined according to the mapping relation in the second sensitivity adjustment mode. For example, when the determined grip forces are all 5N, the amplification gain factor determined according to the mapping relation in the first sensitivity adjustment mode is three times, and the amplification gain factor determined according to the mapping relation in the second sensitivity adjustment mode is five times. In addition, in the mapping relation between the magnitude of the gripping power and the amplification gain of the operational amplification module, the gripping power can be divided into a plurality of gripping power intervals, each gripping power interval is correspondingly matched with one operational amplification gain, and the detection sensitivity of the gripping power detection circuit is adjusted to be matched with the gripping power level due to the fact that the operational amplification gain is related to the detection sensitivity of the gripping power detection circuit, so that the accuracy of the gripping power detection of the handle can be improved.
Referring to fig. 4, in an embodiment, in the selected sensitivity adjustment mode, the step of adjusting the amplification factor of the operational amplification module according to the real-time grip strength further includes:
step S230, acquiring a second voltage signal according to real time, and matching the grasping force generated when the user grasps with the grasping force detection interval according to the second voltage signal;
and step 240, when the grip strength obtained in real time is matched with the determined grip strength detection interval, adjusting the amplification gain multiple of the operational amplification module to an initial amplification gain multiple, and re-obtaining the grip strength to adjust the amplification gain multiple of the operational amplification module.
According to the characteristics of the sensor and the combination of practical application requirements, the grasping force is divided into a plurality of sections, the processor can determine the magnitude of the grasping force detected according to the second voltage signal, the grasping force section corresponding to the grasping force is judged, and different grasping force sections correspond to different amplification factors. If the subsequent grip strength variation does not exceed the grip strength interval, the grip strength in the range is amplified and acquired according to the amplification factor. And when the acquired gripping strength exceeds the gripping strength interval, setting the amplification gain multiple as an initial value, re-detecting the gripping strength, and re-selecting and setting the corresponding amplification gain multiple according to the interval where the gripping strength is located, thereby realizing self-feedback adjustment. For example, the processor detection voltage of 0.5V-1V is set to correspond to the gripping force of 50 gf-100 gf, the corresponding amplification factor is three times, and other gripping force intervals are also distinguished according to a certain rule by the relation between the processor detection voltage and the gripping force. When the processor detects that the grip strength of the handle is in the interval of 50 gf-100 gf, the voltage range acquired by the processor is 1.5V-3V, when the detected voltage exceeds the range of 1.5V-3V due to the change of the grip strength, that is, the detected grip strength exceeds the interval of 50 gf-100 gf, the amplification gain multiple needs to be restored to the initial value, the current grip strength is detected again, and the corresponding amplification gain multiple is determined again according to the corresponding relation, so as to realize self-feedback adjustment.
In an embodiment, the step of determining the amplification factor of the operational amplification module according to the grip strength determined in real time specifically includes:
matching the grip strength determined in real time with a plurality of grip strength intervals;
and selecting the amplification gain multiple corresponding to the matched strength interval according to the mapping relation between the strength interval and the amplification gain multiple.
In an embodiment, the grip strength may be divided into a plurality of grip strength intervals, each of the grip strength intervals is correspondingly matched with one amplification factor, and since the operational amplification factor is related to the detection sensitivity of the grip strength detection circuit, the detection sensitivity of the grip strength detection circuit may be adjusted to be matched with the grip strength step, so that the accuracy of grip strength detection of the handle may be improved. The grip strength interval can be set according to the linearity of the change of the acting force and the resistance value received by the sensor, for example, an interval with obvious change of the amplitude of the first voltage signal along with the change of the grip strength can be set as a first grip strength interval, an interval with insignificant change of the amplitude of the subsequent first voltage signal along with the change of the grip strength is set as a second grip strength interval, and meanwhile, the amplification gain multiple corresponding to the first grip strength interval is smaller than that corresponding to the second grip strength interval. When the grasping power exceeds a certain value, namely, the grasping power reaches a second grasping power interval, the first voltage signal output by the pressure-sensitive sensor module is subjected to operational amplification through the operational amplification module, and a second voltage signal with larger signal amplitude can be generated, so that the sensitivity of grasping power detection can be improved.
Specifically, it is assumed that 3 grip strength intervals a, b, and c are set in the first correspondence in the embodiment of the present application, where a voltage interval corresponding to the grip strength interval a may be 0 to 5 volts, a voltage interval corresponding to the grip strength interval b may be 5 to 10 volts, and a voltage interval corresponding to the grip strength interval c is 10 to 15 volts, so when a signal amplitude of the second voltage signal is in the voltage interval of 0 to 5 volts, it is determined that the corresponding grip strength interval is a, and a gain control signal corresponding to the grip strength interval a is generated to control an operational gain multiple of the operational amplification module; when the signal amplitude of the second voltage signal is in the voltage interval of 5 to 10 volts, determining the corresponding grip strength interval as b, and generating a gain control signal corresponding to the grip strength interval b to control the operational amplification gain multiple of the operational amplification module; when the signal amplitude of the second voltage signal is in the voltage interval of 10 to 15 volts, the corresponding grip strength interval is determined as c, so that a gain control signal corresponding to the grip strength step c is generated to control the operational amplification gain multiple of the operational amplification module. In addition, when the grip strength intervals are the same, the amplification gain corresponding to the first correspondence is smaller than the amplification gain corresponding to the second correspondence, for example, 3 identical grip strength intervals a, b and c are set in the first correspondence and the second correspondence, in the first correspondence, 3 grip strength intervals a, b and c respectively correspond to the amplification gain of two times, four times and six times, and in the second correspondence, 3 grip strength intervals a, b and c respectively correspond to the amplification gain of three times, six times and nine times.
In another embodiment, the step of determining the amplification factor of the operational amplification module according to the grip strength determined in real time specifically includes:
and selecting the amplification gain factor matched with the grip strength according to the grip strength determined in real time and the mapping relation between the grip strength and the amplification gain factor.
In another embodiment, the grip strength and the amplification factor may be mapped in a one-to-one correspondence, and the mapping relationship between the grip strength and the amplification factor may be set according to the linearity of the change of the acting force and the resistance value received by the sensor, that is, each grip strength corresponds to one amplification factor, and since the operational amplification factor is related to the detection sensitivity of the grip strength detection circuit, the sensitivity is adjusted more finely, so that the accuracy of grip strength detection of the handle may be further improved.
According to the technical scheme, after the grip strength exceeds a certain value, even if the change of the amplitude of the first voltage signal along with the change of the grip strength is more insignificant, namely, the grip strength reaches the next grip strength interval, the first voltage signal output by the pressure-sensitive sensor module is subjected to operational amplification through the operational amplification module, so that a second voltage signal with larger signal amplitude can be generated, the sensitivity of grip strength detection can be improved, and the operational amplification gain of the operational amplification module is subjected to closed-loop feedback adjustment according to the magnitude of the grip strength determined by the second voltage signal, so that the operational amplification gain of the operational amplification power can always be matched with the magnitude of the grip strength, and the detection sensitivity of the hand ring grip strength detection circuit can always be matched with the magnitude of the grip strength of the handle, thereby improving the accuracy of grip strength detection of the handle.
The invention also provides a grip strength detection circuit, which comprises:
the pressure-sensitive sensor module is used for detecting the magnitude of the gripping strength and outputting a corresponding first voltage signal;
the input end of the operational amplification module is connected with the output end of the pressure-sensitive sensor module, and the operational amplification module is used for outputting a second voltage signal after performing operational amplification on the first voltage signal;
the receiving end of the processor module is connected with the output end of the operational amplification module, a sensitivity control program is stored in the processor module, and the grasping force detection sensitivity adjustment method is realized when the sensitivity control program is executed by the controller.
Referring to fig. 1, fig. 1 is a schematic diagram of functional modules of an embodiment of a grip strength detection circuit, which includes a pressure sensor module, an operational amplifier module, and a processor module. The pressure-sensitive sensor module is used for outputting a corresponding first voltage signal to the operational amplification module according to the magnitude of the grasping force, wherein the signal amplitude of the first voltage signal changes along with the magnitude of the grasping force, and the pressure-sensitive sensor module can be a resistance-type pressure-sensitive sensor module; the operational amplification module is configured to perform operational amplification on the first voltage signal, generate a second voltage signal, and output the second voltage signal to the processor module 300; and the processor module is used for performing closed-loop feedback adjustment on the operational amplification gain multiple of the operational amplification module according to the signal amplitude of the second voltage signal, wherein the operational amplification gain multiple is related to the detection sensitivity of the grip strength detection circuit, and the larger the operational amplification gain multiple is, the higher the detection sensitivity of the grip strength detection circuit is.
In an embodiment, the pressure sensitive sensor module comprises:
the resistance type pressure-sensitive sensor is used for detecting the magnitude of the gripping strength and outputting a corresponding resistance value;
the input end of the resistor voltage dividing circuit is connected with the output end of the resistor type pressure-sensitive sensor, and the resistor voltage dividing circuit is used for outputting a corresponding first voltage signal to the operational amplification module according to the resistance value of the resistor type pressure-sensitive sensor.
In one embodiment, the processor module comprises:
the receiving end of the microprocessor is connected with the output end of the operational amplification module, a sensitivity control program is stored in the microprocessor, and the grasping force detection sensitivity adjustment method is realized when the sensitivity control program is executed by the microprocessor;
the control end of the gain control module is connected with the control end of the microprocessor, the control end of the gain control module is connected with the control end of the operational amplification module, and the gain control module is used for adjusting the amplification gain of the operational amplification module to the target amplification gain when receiving a gain control signal.
Referring to fig. 5, fig. 5 is a schematic diagram of a functional module of an embodiment of a grip strength detection circuit, where the grip strength detection circuit includes a resistive pressure sensor, a resistive voltage divider, an operational amplifier, a gain control module, and a microprocessor. The resistor type voltage-sensitive sensor can be realized by using a piezoresistor or other sensors, the resistor voltage-dividing circuit can be used for selecting a fixed resistor and the resistor type voltage-sensitive sensor to be arranged in series so as to output a corresponding first voltage signal, the operational amplification module can be realized by using a comparator, the amplification gain multiple of the operational amplification module can be changed by changing the voltage of the reference end of the operational amplification module, the gain control module can be realized by selecting an adjustable resistor, and the voltage of the reference end of the operational amplification module can be changed by changing the resistance value of the adjustable resistor so as to achieve the effect of changing the amplification gain multiple of the operational amplification module.
Specifically, referring to fig. 6 and fig. 7, fig. 6 is a schematic circuit diagram of an embodiment of a grip strength detection circuit, and fig. 7 is a schematic circuit diagram of another embodiment of a grip strength detection circuit, in which an operational amplification module is implemented by using an operational amplification chip U1, a gain control module is formed by connecting a first fixed resistor R0 and a variable resistor R3 in series, and the variable resistor R3 may be a digital potentiometer; the non-inverting input end of the operational amplification chip U1 is connected with the output end of the pressure-sensitive sensor module, the inverting input end of the operational amplification chip U1 is connected with the midpoints of the first fixed resistor R0 and the variable resistor R3, and the output end of the operational amplification chip U1 is connected with a microprocessor; the microprocessor is used for adjusting the resistance value of the variable resistor R3 according to the gain control signal, and the operational amplification gain of the operational amplification module changes along with the change of the resistance value of the variable resistor R3, so that the operational amplification gain of the operational amplification module can be adjusted, and the detection sensitivity of the grip strength detection circuit can be adjusted based on the operational amplification gain.
Referring to fig. 7, one end of the pressure sensor module is grounded, the other end of the pressure sensor module is connected to the power supply end Vs, the pressure sensor module is formed by connecting a first resistor R1 and a second resistor R2 in series, the input end of the operational amplification chip U1 is connected to the middle point of the first resistor R1 and the second resistor R2, one end of the first resistor R1 is grounded, the other end of the first resistor R1 is connected to the second resistor R2, the other end of the second resistor R2 is connected to the power supply end Vs, wherein if the first resistor R1 is a second fixed resistor, the second resistor R2 is a varistor, if the first resistor R1 is a varistor, the second resistor R2 is a second fixed resistor, both the first fixed resistor R0 and the second fixed resistor are resistors with invariable resistance values, and the varistor is a resistor with variable resistance values due to the applied pressure. Thus, for the first voltage corresponding to the first voltage signal output by the pressure-sensitive sensor module
Figure BDA0004139035180000161
The voltage sensor module can output a corresponding first voltage signal according to the magnitude of the grasping force.
With further reference to fig. 6, the gain control module is formed by a firstThe fixed resistor R0 and the variable resistor R3 are connected in series, one end of the first fixed resistor R0 is grounded, and the other end of the first fixed resistor R0 is connected with the inverting input end of the operational amplifier chip U1; one end of the variable resistor R3 is connected to the inverting input end of the operational amplifier chip U1, and the other end of the variable resistor R3 is connected to the output end of the operational amplifier chip U1. Thus, the second voltage corresponding to the second voltage signal output by the operational amplifier module
Figure BDA0004139035180000162
Thus, if the microprocessor increases the resistance of the variable resistor R3 according to the gain control signal, the operational amplification gain factor can be increased>
Figure BDA0004139035180000171
If the microprocessor 300 decreases the resistance of the variable resistor R3 according to the gain control signal, the operational amplifier gain ++>
Figure BDA0004139035180000172
Referring further to fig. 7, the variable resistance module 201 is formed by connecting a first fixed resistor R0 and a variable resistor R3 in series, one end of the variable resistor R3 is grounded, and the other end of the variable resistor R3 is connected to the inverting input terminal of the operational amplifier chip U1; one end of the first fixed resistor R0 is connected to the inverting input end of the operational amplifier chip U1, and the other end of the first fixed resistor R0 is connected to the output end of the operational amplifier chip U1. Thus, the second voltage corresponding to the second voltage signal output by the operational amplifier module
Figure BDA0004139035180000173
Thus, if the microprocessor increases the resistance of the variable resistor R3 according to the gain control signal, the operational amplification gain factor can be reduced>
Figure BDA0004139035180000174
If the microprocessor is based on the gain control signal,the operational amplification gain factor can be increased by decreasing the resistance of the variable resistor R3>
Figure BDA0004139035180000175
According to the technical scheme, the grip strength detection circuit is formed by arranging the pressure-sensitive sensor module, the operational amplification module and the processor module, wherein the pressure-sensitive sensor module is used for outputting a corresponding first voltage signal to the operational amplification module according to the magnitude of the grip strength; the operational amplification module is used for performing operational amplification on the first voltage signal, generating a second voltage signal and outputting the second voltage signal to the processor module; and the processor module is used for carrying out closed-loop feedback adjustment on the operational amplification gain of the operational amplification module according to the second voltage signal so as to adjust the detection sensitivity of the grip strength detection circuit. Thus, after the grip strength exceeds a certain value, even if the change of the amplitude of the first voltage signal is increasingly insignificant along with the change of the grip strength, the operational amplification module is used for carrying out operational amplification on the first voltage signal output by the pressure-sensitive sensor module, so that a second voltage signal with larger signal amplitude can be generated, the sensitivity of grip strength detection can be improved, and the processor module is further used for carrying out closed-loop feedback adjustment on the operational amplification gain of the operational amplification module according to the second voltage signal, so that the operational amplification gain of the operational amplification power can always be matched with the magnitude of the grip strength, and the detection sensitivity of the hand ring grip strength detection circuit can always be matched with the magnitude of the hand grip strength, thus the accuracy of hand grip strength detection can be improved.
The invention also provides a handle which comprises a shell, a middle frame, foam, a circuit board and the grasping strength detection circuit; wherein,,
the resistor voltage dividing circuit, the operational amplification module and the processor module in the grip strength detection circuit are arranged on the circuit board;
the resistance type pressure-sensitive sensor in the grip strength detection circuit is attached to the middle frame and clamped between the shell and the middle frame, and is electrically connected with the resistance voltage dividing circuit through a connecting piece;
the foam is adhered to the resistance type pressure-sensitive sensor in the grip strength detection circuit, and is clamped between the shell and the resistance type pressure-sensitive sensor in the grip strength detection circuit.
Referring to fig. 8, fig. 8 is a schematic structural view of an embodiment of a handle, in which a resistive pressure sensor is assembled inside a housing, and foam is used as a force transmission medium and connected with a resistive voltage dividing circuit on a circuit board through a wire. When a user grasps the handle, force is applied to the resistance type pressure-sensitive sensor through the shell, so that the resistance value of the resistance type pressure-sensitive sensor is changed, the resistance voltage dividing circuit outputs a corresponding first voltage signal to the operational amplification module, the operational amplification module performs operational amplification on the first voltage signal to generate a second voltage signal and outputs the second voltage signal to the processor module, and the processor module performs closed-loop feedback adjustment on the operational amplification gain of the operational amplification module according to the second voltage signal so as to adjust the detection sensitivity of the grasping strength detection circuit.
In one embodiment, the handle further comprises:
the reset key is arranged on the shell, the output end of the reset key is connected with the processor module in the grip strength detection circuit, and the reset key is used for outputting a reset signal to the processor module in the grip strength detection circuit when triggered;
and the processor module is also used for controlling the operational amplification module in the grip strength detection circuit to carry out operational amplification according to the initial amplification gain multiple when the reset signal is received, so as to determine the user category according to the second voltage signal output by the operational amplification module.
It can be understood that in the technical scheme of the invention, the operational amplification module can be controlled to perform operational amplification according to the initial amplification gain multiple, so as to perform preliminary detection on the grasping power of the user, and further judge the grasping power range of the user according to the preliminary detected grasping power. Therefore, in this embodiment, the handle is further provided with a reset button, when the user wants to perform preliminary detection of the grip strength, so that when the handle determines the corresponding sensitivity adjustment mode, the reset button can be pressed, and when the processor module receives the reset button, the processor module controls the operational amplification module to perform operational amplification according to the initial amplification gain factor, performs preliminary detection on the grip strength of the user, and determines the user category and the sensitivity adjustment mode corresponding to the user category according to the preliminary detected grip strength, so that the detection sensitivity of the bracelet grip strength detection circuit can be always matched with the magnitude of the grip strength of the handle, and therefore the accuracy of the grip strength detection of the handle can be improved.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (12)

1. The utility model provides a grab strength detection sensitivity adjustment method, is applied to grab strength detection circuit, its characterized in that, grab strength detection circuit includes pressure-sensitive sensor module and operational amplifier module, pressure-sensitive sensor module is used for detecting the size of grab strength to output corresponding first voltage signal to operational amplifier module, so that operational amplifier module carries out the operational amplification to first voltage signal and then output second voltage signal, grab strength detection sensitivity adjustment method includes:
acquiring a user category;
and selecting a corresponding sensitivity adjustment mode according to the user category, and adjusting the amplification gain multiple of the operational amplification module according to the grip strength obtained in real time in the selected sensitivity adjustment mode.
2. The grip strength detection sensitivity adjustment method according to claim 1, wherein the user categories include a first user category and a second user category;
The step of obtaining the user category specifically includes:
the operational amplification module is controlled to carry out operational amplification according to the initial amplification gain factor, and the test grasping force of a user is determined according to the acquired second voltage signal;
when the test grip strength is greater than a preset strength threshold, determining the user category as a first user category;
and when the test grip strength is not greater than the preset strength threshold, determining the user category as a second user category.
3. The grip strength detection sensitivity adjustment method according to claim 1, wherein the user categories include a first user category and a second user category;
the sensitivity adjustment modes comprise a first adjustment mode corresponding to a first user category and a second adjustment mode corresponding to a second user; wherein,,
the first adjusting mode is used for adjusting the amplification gain factor of the operation amplification module based on the mapping relation among the first user type, the grasping force generated when the user grasps and the amplification gain factor of the operation amplification module;
and the second adjusting mode is used for adjusting the amplification gain factor of the operation amplification module based on the mapping relation among the second user category, the grasping force generated when the user grasps and the amplification gain factor of the operation amplification module.
4. The grip strength detection sensitivity adjustment method according to claim 3, wherein the step of adjusting the amplification factor of the operational amplification module according to the real-time grip strength in the selected sensitivity adjustment mode includes:
acquiring a second voltage signal in real time, and determining the grasping force generated when a user grasps according to the second voltage signal;
and determining the gain multiple to be amplified of the operational amplification module according to the grip strength determined in real time, and adjusting the gain multiple to be amplified of the operational amplification module to the determined gain multiple.
5. The grip strength detection sensitivity adjustment method according to claim 4, wherein the step of adjusting the amplification factor of the operational amplification module according to the real-time grip strength in the selected sensitivity adjustment mode further comprises:
acquiring a second voltage signal according to real time, and matching the grasping force generated when the user grasps with a grasping force detection interval according to the second voltage signal;
when the grip strength obtained in real time is matched with the grip strength detection interval, the amplification gain multiple of the operational amplification module is adjusted to the initial amplification gain multiple, and the grip strength is obtained again to adjust the amplification gain multiple of the operational amplification module.
6. The grip strength detection sensitivity adjustment method according to claim 4, wherein the step of determining the amplification factor of the operational amplification module according to the grip strength determined in real time specifically includes:
matching the grip strength determined in real time with a plurality of grip strength intervals;
and selecting the amplification gain multiple corresponding to the matched strength interval according to the mapping relation between the strength interval and the amplification gain multiple.
7. The grip strength detection sensitivity adjustment method according to claim 4, wherein the step of determining the amplification factor of the operational amplification module according to the grip strength determined in real time is specifically:
and selecting the amplification gain factor matched with the grip strength according to the grip strength determined in real time and the mapping relation between the grip strength and the amplification gain factor.
8. A grip strength detection circuit, the grip strength detection circuit comprising:
the pressure-sensitive sensor module is used for detecting the magnitude of the gripping strength and outputting a corresponding first voltage signal;
the input end of the operational amplification module is connected with the output end of the pressure-sensitive sensor module, and the operational amplification module is used for outputting a second voltage signal after performing operational amplification on the first voltage signal;
The receiving end of the processor module is connected with the output end of the operational amplification module, a sensitivity control program is stored in the processor module, and the sensitivity control program realizes the grip strength detection sensitivity adjustment method according to any one of claims 1-7 when being executed by the controller.
9. The grip strength detection circuit according to claim 8, wherein the pressure sensitive sensor module includes:
the resistance type pressure-sensitive sensor is used for detecting the magnitude of the gripping strength and outputting a corresponding resistance value;
the input end of the resistor voltage dividing circuit is connected with the output end of the resistor type pressure-sensitive sensor, and the resistor voltage dividing circuit is used for outputting a corresponding first voltage signal to the operational amplification module according to the resistance value of the resistor type pressure-sensitive sensor.
10. The grip strength detection circuit according to claim 8, wherein the processor module includes:
the microprocessor, the receiving end of the said microprocessor connects with output end of the said operational amplifier module, store the control program of the sensitivity in the said microprocessor, the said sensitivity control program is implemented as the method for detecting and adjusting the sensitivity of the grip strength according to any one of claims 1-7 when being executed by the said microprocessor;
The control end of the gain control module is connected with the control end of the microprocessor, the control end of the gain control module is connected with the control end of the operational amplification module, and the gain control module is used for adjusting the amplification gain of the operational amplification module to the target amplification gain when receiving a gain control signal.
11. A handle, comprising a housing, a middle frame, foam, a circuit board, and a grip strength detection circuit according to any one of claims 8-10; wherein,,
the resistor voltage dividing circuit, the operational amplification module and the processor module in the grip strength detection circuit are arranged on the circuit board;
the resistance type pressure-sensitive sensor in the grip strength detection circuit is attached to the middle frame and clamped between the shell and the middle frame, and is electrically connected with the resistance voltage dividing circuit through a connecting piece;
the foam is adhered to the resistance type pressure-sensitive sensor in the grip strength detection circuit, and is clamped between the shell and the resistance type pressure-sensitive sensor in the grip strength detection circuit.
12. The handle as set forth in claim 11, wherein said handle further comprises:
The reset key is arranged on the shell, the output end of the reset key is connected with the processor module in the grip strength detection circuit, and the reset key is used for outputting a reset signal to the processor module in the grip strength detection circuit when triggered;
and the processor module is also used for controlling the operational amplification module in the grip strength detection circuit to carry out operational amplification according to the initial amplification gain multiple when the reset signal is received, so as to determine the user category according to the second voltage signal output by the operational amplification module.
CN202310279379.3A 2023-03-17 2023-03-17 Grip strength detection sensitivity adjusting method, grip strength detection circuit and handle Pending CN116271790A (en)

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CN202310279379.3A CN116271790A (en) 2023-03-17 2023-03-17 Grip strength detection sensitivity adjusting method, grip strength detection circuit and handle

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Application Number Priority Date Filing Date Title
CN202310279379.3A CN116271790A (en) 2023-03-17 2023-03-17 Grip strength detection sensitivity adjusting method, grip strength detection circuit and handle

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