Electric control grip dynamometer and measuring method thereof

Abstract

The electrically-controlled grip dynamometer comprises a U-shaped handle capable of being held and pressed, the opening end of the U-shaped handle is connected with a magnet damping assembly, the magnet damping assembly comprises two magnet dampers, the same poles of the two magnet dampers are oppositely arranged, and at least one magnet damper is controlled by a magnet damping control circuit; the magnet damping control circuit comprises a magnet damping electric control circuit or a magnet damping alternating current circuit; the sensing circuit at least comprises a sensing component and a power supply. The combination of the permanent magnet and the electromagnet or the combination of the electromagnets is realized, the problem that deformation is easy to generate when a spring is used is solved, and the accuracy of the grip dynamometer is improved and the service life is prolonged by adopting the combination; the slide rheostat is suitable for adults and children to specifically adjust the knob resistance value of the slide rheostat to control the magnitude of the magnetic force according to grip strength conditions of different age groups, so that patients of different age groups and different grip strength can be better detected.

Description

Technical Field

[0001] The invention belongs to the field of medical detection, and in particular relates to an electric-controlled handgrip dynamometer and a measuring method thereof. Background Art

[0002] When a patient injures his hand, the recovery of his grip strength should be checked regularly, and then the doctor can make targeted adjustments to the drug treatment.

[0003] At present, the detection device adopts the method of gripping and pressing the spring. The spring as the gripping device is easy to deform, resulting in inaccurate measurement.

[0004] In addition, because the patients include adults and children, the grip strength of the two is inconsistent. The existing handgrip dynamometers cannot distinguish between the two because they all use the same spring and cannot be used to conduct targeted testing of the patient's grip strength recovery for different patients.

[0005] There is currently no measuring device on the market that can detect whether the grip strength meets the standard. Summary of the invention

[0006] The purpose of the present invention is to overcome the above problems and provide an electronically controlled handgrip dynamometer and a measuring method thereof.

[0007] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0008] In one aspect, a handgrip dynamometer is provided, comprising a grippable U-shaped handle, wherein an open end of the U-shaped handle is connected to a magnet damping assembly,

[0009] The magnet damping assembly comprises two magnet dampers with the same poles arranged opposite to each other, wherein at least one of the magnet dampers is controlled by a magnet damping control circuit; the magnet damping control circuit comprises a magnet damping electric control circuit or a magnet damping AC circuit;

[0010] A sensing circuit, wherein the sensing circuit comprises at least a sensing component and a power supply.

[0011] As a further improvement, the magnet damping electric control circuit includes a sliding rheostat, an MCU single chip computer, a PWM module, an electromagnet, a first power supply and a first display.

[0012] As a further improvement, the magnet damping AC circuit includes an electrically connected coil, a switch, a first power supply and a first sliding rheostat.

[0013] As a further improvement, the sensing component includes an angular displacement sensor and a second display that are electrically connected.

[0014] As a further improvement, the sensing component includes an electrically connected indicator light and a contact switch.

[0015] On the other hand, the present invention also provides a method for measuring a handgrip dynamometer, comprising the following steps:

[0016] The magnet damping control circuit is closed; wherein, when the magnet damping control circuit is a magnet damping electric control circuit, the second sliding rheostat is adjusted within a threshold range;

[0017] Hold the U-shaped handle and approach the magnets in the magnet damping assembly;

[0018] The sensing circuit is closed, and the first display shows the grip force or the indicator light turns on.

[0019] As a further improvement, the magnet damping control circuit is closed, comprising the following steps:

[0020] Turn on the power supply to adjust the resistance value of the second sliding rheostat;

[0021] The IO port of the MCU receives the resistance signal of the second sliding rheostat, converts the resistance signal into a resistance duty cycle signal, and sends the resistance duty cycle signal to the PWM module through the IO port;

[0022] The PWM module obtains the resistance duty cycle signal and converts the resistance duty cycle signal into a power signal;

[0023] The voltage signal in the power signal controls the magnetic force of the electromagnet.

[0024] As a further improvement, the first display displays grip strength, further comprising the following steps:

[0025] When the U-shaped steel belt is bent, the angular position sensor senses the change of the U-shaped steel belt, and the electronic control module obtains the magnitude of the repulsive force of the magnet;

[0026] The magnitude of the magnet repulsion force is compared with the magnitude of the fixed value. If the two are equal, the patient's grip strength meets the standard. The calculation formula of the fixed value is:

[0027] F1=F-F2, where F is the standard value of grip strength, F1 is a fixed value, and F2 is the value of strain force compensation.

[0028] As a further improvement, the method for obtaining the magnitude of the strain force compensation comprises the following steps:

[0029] Remove the electromagnet and permanent magnet on the U-shaped structure, hold the U-shaped steel strip for multiple times, and obtain the deformation of the U-shaped steel strip multiple times;

[0030] The strain force compensation magnitude is obtained according to the deformation amount.

[0031] As a further improvement, the voltage signal in the power signal controls the magnetic force of the electromagnet, comprising the following steps:

[0032] The PWM module changes the voltage by changing the power.

[0033] The change in the magnitude of the voltage controls the magnitude of the magnetic force of the electromagnet.

[0034] The beneficial effects of the present invention are:

[0035] The electric-controlled handgrip dynamometer and the measuring method thereof realize the use of a combination of a permanent magnet and an electromagnet or an electromagnet and an electromagnet, thereby overcoming the problem that a spring is prone to deformation. The use of such a combination improves the accuracy of the handgrip dynamometer and prolongs its service life.

[0036] The sliding rheostat mode can be used to adjust the current size, thereby changing the magnetic force of the electromagnet. This can be used for adults and children to adjust the resistance of the sliding rheostat knob to control the magnetic force according to the grip strength of different age groups, so as to better detect patients with different grip strengths of different age groups;

[0037] The use of calibrated magnet repulsion value and U-shaped steel belt strain force compensation value improves the accuracy of the detection value. At the same time, it can also detect whether the grip strength meets the standard, providing a new grip strength detection method for medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention has the following accompanying drawings:

[0039] Figure 1 The structure of an electronically controlled handgrip dynamometer according to some specific embodiments of the present invention is shown in FIG. Figure 1 ;

[0040] Figure 2 is a schematic diagram of the structure of an electric control module in some specific embodiments of the present invention;

[0041] Figure 3 is a schematic structural diagram of a second sliding rheostat and an angular displacement sensor in some specific embodiments of the present invention;

[0042] Figure 4 The structure of an electronically controlled handgrip dynamometer according to some specific embodiments of the present invention is shown in FIG. Figure 2 ;

[0043] Figure 5 It is a circuit principle diagram of the electromagnet of the present invention;

[0044] Figure 6 It is a circuit principle diagram of the contact switch of the present invention;

[0045] Figure 7 It is a flowchart of a measurement method of an electronically controlled handgrip dynamometer according to some specific embodiments of the present invention.

[0046] In the figure: 1. U-shaped steel belt, 2. magnet damping assembly, 201. permanent magnet, 202. electromagnet, 21. coil, 22. switch, 23. first power supply, 24. first sliding rheostat, 3. contact assembly, 31. indicator light, 32. contact switch, 33. second power supply, 4. touch plate, 5. support rod, 6. second sliding rheostat, 61. sliding rheostat knob, 7. connecting rod, 8. display, 9. angular displacement sensor. DETAILED DESCRIPTION

[0047] The following examples further illustrate the content of the present invention, but should not be construed as limiting the present invention. Without departing from the spirit and substance of the present invention, modifications or substitutions made to the methods, steps or conditions of the present invention all fall within the scope of the present invention.

[0048] Embodiment 1:

[0049] like Figure 1-6 As shown, a handgrip dynamometer comprises a grippable U-shaped handle, wherein the open end of the U-shaped handle is connected to a magnet damping assembly 2.

[0050] The magnet damping assembly 2 comprises two magnet dampers with the same poles arranged opposite to each other, wherein at least one of the magnet dampers is controlled by a magnet damping control circuit; the magnet damping control circuit comprises a magnet damping electric control circuit or a magnet damping AC circuit;

[0051] The magnet damping control circuit can be a magnet damping electric control circuit or a magnet damping AC circuit; and the magnet damping electric control circuit or the magnet damping AC circuit can be exchanged and matched with the magnet damping electric control circuit in the sensing component or the circuit composed of the electrically connected indicator light 31 and the contact switch 32, so as to clearly display the patient's grip recovery status.

[0052] For example, a circuit consisting of a magnet damping electric control circuit and an electrically connected indicator light 31 and a contact switch 32 is matched. The magnet damping electric control circuit controls the voltage of the electromagnet through a PWM module, thereby controlling the magnetic force of the electromagnet. When the indicator light 31 and the contact switch 32 are matched, when the light is on, it means that the circuit is connected, the patient has overcome the repulsive force of the two magnets, and the recovery is good.

[0053] At the same time, a magnet damping AC circuit and a circuit consisting of an electrically connected indicator light 31 and a contact switch 32 can also be used. The magnet damping AC circuit supplies power to the electromagnet, thereby controlling the magnitude of the electromagnet's magnetic force. When the patient holds the contact switch, the contact switch is closed and the light bulb is lit, indicating that the patient has overcome the repulsive force of the two magnets.

[0054] It is also possible to match a circuit consisting of a magnet damping electric control circuit and an angular displacement sensor. The magnet damping electric control circuit controls the voltage of the electromagnet through a PWM module, thereby controlling the magnitude of the magnetic force of the electromagnet. When the patient overcomes the repulsive force of the two magnets, the movement of the angular displacement sensor is detected, and the information of the movement of the angular displacement sensor or / and the fixed value of the repulsive force is displayed on the display.

[0055] It is also possible to combine a circuit consisting of a magnet damping AC circuit and an angular displacement sensor. The magnet damping AC circuit supplies power to the electromagnet, thereby controlling the magnitude of the electromagnet's magnetic force. When the patient overcomes the repulsive force of the two magnets, the movement of the angular displacement sensor is detected, and the fixed value of the repulsive force is displayed on the display.

[0056] The above-mentioned combinations are various and will not be elaborated here. All similar combinations are within the protection scope of the present invention.

[0057] A sensing circuit, wherein the sensing circuit comprises at least a sensing component and a power supply.

[0058] For example, there are multiple options for the sensing component. When the touch panel touches the inner wall of the U-shaped steel belt, the contact switch is closed and the light bulb is lit, indicating that the patient has overcome the grip strength. Alternatively, the displacement sensor 9 may touch the inner wall of the U-shaped steel belt 1, and then a prompt is displayed on the display that the displacement sensor has produced a displacement deformation.

[0059] In the present invention, a sliding rheostat mode is adopted to adjust the current size, thereby changing the magnetic force of the electromagnet. This can be suitable for adults and children according to the grip strength of different age groups. The knob resistance of the sliding rheostat can be adjusted in a targeted manner to control the size of the magnetic force, thereby better detecting patients of different age groups with different grip strengths.

[0060] For example, an adult can adjust the sliding rheostat (the first sliding rheostat or the second sliding rheostat) to a high gear (a gear with large current) to control the magnitude of the electromagnet's magnetic force; for children or the elderly with weak grip strength, it can be adjusted to a low gear (a gear with small current) to control the magnitude of the electromagnet's magnetic force.

[0061] In some embodiments of the present invention, the magnet damping electric control circuit includes a sliding rheostat, an MCU single chip computer, a PWM module, an electromagnet, a first power supply and a first display.

[0062] In some embodiments of the present invention, the magnet damping assembly is composed of two electromagnets or an electromagnet and a permanent magnet.

[0063] In some embodiments of the present invention, the magnet damping AC circuit includes a coil 21 , a switch 22 , a first power source 23 and a first sliding rheostat 24 that are electrically connected.

[0064] In some embodiments of the present invention, the sensing component includes an angular displacement sensor and a second display electrically connected.

[0065] In some embodiments of the present invention, the sensing component includes an indicator light 31 and a contact switch 32 that are electrically connected.

[0066] In some embodiments of the present invention, both the U-shaped steel belt 1 and the magnet damping assembly 2 can be calibrated; the calibration method is similar.

[0067] For example, when calibrating the magnet damping assembly 2, the U-shaped steel belt 1 is removed, and only two magnets are retained. The distance between the two magnets is continuously adjusted, and then when the two magnets are moved in multiple positions, the repulsive force is measured, and then recorded as the grip force value (repulsive force) designed for the dynamometer when the two magnets are at the same distance.

[0068] In addition, the calibration method of strain force compensation is: There is another situation that can also compensate for the strain force. This is because our deformation is very small first, and then if the deformation is very small, the deformation of the steel strip or the U-shaped structure is 1 mm or 2 mm. The size can be calibrated. Remove the electromagnet and permanent magnet on the U-shaped structure, hold the U-shaped steel strip several times in a row, and obtain the deformation of the U-shaped steel strip multiple times. Remove the electromagnet and the permanent magnet, and then ask someone to press it directly. If the deformation is 2 mm or 1 mm, how much force is needed for the steel plate to deform? After obtaining the deformation compensation force, the standard value minus the size of the deformation compensation force is the size of the repulsive force of the electromagnet, and then the repulsive force of the electromagnet is calibrated to the size of the reverse current.

[0069] In the present invention, when the patient holds the handgrip dynamometer, when the U-shaped steel belt moves and the displacement sensor 9 touches the inner wall, it means that the patient can overcome this force, indicating that the hand has recovered well and is not bad. A fixed value is displayed on the display, wherein the fixed value (the repulsive force calibrated by the two magnets, excluding the strain force compensation of the steel belt) is displayed on the display.

[0070] Embodiment 2:

[0071] A handgrip dynamometer comprises a grippable U-shaped handle, wherein the open end of the U-shaped handle is connected to a magnet damping assembly 2.

[0072] The magnet damping assembly 2 includes two magnet dampers with the same poles arranged opposite to each other, at least one of which is controlled by a magnet damping circuit, and the magnet damping circuit includes an electrically connected coil 21, a switch 22, a first power supply 23 and a sliding rheostat 24;

[0073] For example, the magnet damping component 2 can be composed of two electromagnets, or a permanent magnet and an electromagnet. By energizing the electromagnets in the magnet damping component 2, two opposite magnets of the same polarity generate magnetic force, which is the grip strength that the patient needs to overcome. If the patient can overcome the magnetic force, it means that the patient's grip strength meets the standard and the recovery is good.

[0074] A contact switch circuit includes an indicator light 31 , a contact switch 32 and a second power source 33 which are electrically connected.

[0075] In some embodiments of the present invention, the contact switch circuit is installed on the contact assembly 3.

[0076] In some embodiments of the present invention, the contact assembly 3 includes a touch panel 4; the end of the touch panel 4 away from the contact switch 32 is close to the inner side of the U-shaped handle.

[0077] For example, the touch panel 4 is very close to the inner side of the U-shaped handle, and when the hand is gripped, the inner wall contacts the touch panel 4, and then the touch panel 4 presses the contact switch 32 on the contact assembly 3, and the contact switch 32 is closed, lighting up the indicator light 31. It means that the patient can hold this grip, the patient's grip strength meets the standard, and the recovery is not bad.

[0078] In some embodiments of the present invention, the magnetic damping includes a permanent magnet 201 and an electromagnet 202 controlled by a magnetic damping circuit.

[0079] In some embodiments of the present invention, the magnet damping includes two electromagnets 202 controlled by a magnet damping circuit.

[0080] Embodiment 3:

[0081] The present invention discloses a handgrip dynamometer, comprising:

[0082] U-shaped handle; it can be a steel structure with a certain degree of curvature or other structures that can be deformed when held by hand; the U-shaped handle is U-shaped;

[0083] The magnet damping assembly 2 is installed on the inner side of the upper end of the U-shaped handle; the magnet damping assembly 2 can be composed of two magnets, one of which is connected to the inner side of the upper end of the U-shaped handle, and the other is connected to the inner side of the other end; the two magnets close to one end have the same polarity and repel each other, and both have a certain magnetic force; the size of the repulsive force between the two is the size of the grip strength of the hand dynamometer calibrated for each product. When a person holds the hand, the indicator light is on, indicating that the patient's grip strength has reached this standard and the hand grip strength has recovered well.

[0084] like Figure 6As shown, each handgrip dynamometer can be calibrated by calculating the repulsive force between the two magnets. When the handgrips the U-shaped handle, one end of the touch panel is connected to the contact assembly 3, and the other end is close to the inner side of the U-shaped handle. When the touch panel 4 is gripped, it touches the inner side of the U-shaped handle, the contact switch circuit is connected, and the indicator light 31 is lit.

[0085] The contact assembly 3 is mounted on the inner side of the U-shaped handle; an indicator light 31 is provided on the contact assembly 3; when the touch plate 4 touches the inner side of the U-shaped handle, the contact switch 32 is closed and the indicator light 31 is lit; the indicator light is mounted on the contact assembly 3, and the on or off of the indicator light 31 is controlled by the closing or opening of the contact switch 32;

[0086] A touch panel 4 is installed between the U-shaped handle and the contact switch;

[0087] The magnet damping assembly 2 includes two magnets.

[0088] For example, one of the two magnets may be a permanent magnet 201 and the other may be an electromagnet 202 ; or both of the two magnets may be electromagnets 202 .

[0089] In addition, in the manufactured product, the handgrip dynamometer has an outer shell, which is a conventional shell in the prior art, that is, a layer of shell wrapped outside the above structure, and is not limited here.

[0090] In some embodiments of the present invention, the U-shaped handle is U-shaped.

[0091] In some embodiments of the present invention, the two magnets are a permanent magnet and an electromagnet.

[0092] In some embodiments of the present invention, the two magnets are two electromagnets.

[0093] In some embodiments of the present invention, the circuit of the electromagnet includes a coil 21; one end of the coil is connected to one end of a switch 22; the other end of the switch 22 is connected to one end of a first power supply 23; the other end of the first power supply 23 is connected to one end of a sliding rheostat 24; the other end of the sliding rheostat 24 is connected to the other end of the coil 21.

[0094] The current in the electromagnet circuit is controlled by controlling the resistance of the sliding rheostat 24, thereby controlling the magnitude of the magnetic force generated by the electromagnet.

[0095] In some embodiments of the present invention, Figure 3 As shown, the first sliding rheostat and the second sliding rheostat are used to adjust the resistance of the rheostat by rotating. The resistance of the first sliding rheostat and the second sliding rheostat can be adjusted by adjusting the sliding rheostat knob 61.

[0096] In some embodiments of the present invention, Figure 3 As shown, the angular displacement sensor 9 is connected to the second sliding rheostat 6 through the support rod 5, and the two are coaxial; at the beginning, the two diagonal touch plates 4 on both sides of the angular displacement sensor 9 are almost close to the inner wall position of the U-shaped steel belt 1. When the hand is grasped, the two touch plates touch the inner wall of the U-shaped steel belt 1. At this time, the angular displacement sensor 9 will be deflected, and the MCU will capture the electrical signal to determine whether deformation occurs. When deformation occurs, the display shows the fixed value of the grip force and the deflection of the angular displacement sensor.

[0097] In some embodiments of the present invention, the circuit of the contact switch includes an indicator light 31; one end of the indicator light 31 is connected to one end of the contact switch 32; the other end of the contact switch 32 is connected to one end of the second power supply 33; the other end of the second power supply 33 is connected to the other end of the indicator light 31.

[0098] Embodiment 4:

[0099] On the other hand, Figure 7 As shown, the present invention also proposes a measurement method of a handgrip dynamometer, comprising the following steps:

[0100] The magnet damping control circuit is closed; wherein, when the magnet damping control circuit is a magnet damping electric control circuit, the second sliding rheostat is adjusted within the threshold range, so that the magnet damping control circuit is within a certain range, because the current is too high, the circuit will burn out.

[0101] Holding the U-shaped handle, the magnet in the magnet damping assembly 2 approaches;

[0102] The sensing circuit is closed, and the first display shows the grip force or the indicator light 31 turns on.

[0103] The magnet damping control circuit is closed, including the following steps:

[0104] Turn on the power supply to adjust the resistance value of the second sliding rheostat;

[0105] The IO port of the MCU receives the resistance signal of the second sliding rheostat, converts the resistance signal into a resistance duty cycle signal, and sends the resistance duty cycle signal to the PWM module through the IO port;

[0106] The PWM module obtains the resistance duty cycle signal and converts the resistance duty cycle signal into a power signal;

[0107] The voltage signal in the power signal controls the magnetic force of the electromagnet.

[0108] The first display shows the grip force, further comprising the steps of:

[0109] When the U-shaped steel belt is bent, the angular position sensor senses the change of the U-shaped steel belt, and the electronic control module obtains the magnitude of the repulsive force of the magnet;

[0110] The magnitude of the magnet repulsion force is compared with the magnitude of the fixed value. If the two are equal, the patient's grip strength meets the standard. The calculation formula of the fixed value is:

[0111] F1=F-F2, where F is the standard value of grip strength, F1 is a fixed value, and F2 is the value of strain force compensation.

[0112] The method for obtaining the size of the strain force compensation includes the following steps:

[0113] Remove the electromagnet and permanent magnet on the U-shaped structure, hold the U-shaped steel strip for multiple times, and obtain the deformation of the U-shaped steel strip multiple times;

[0114] The strain force compensation magnitude is obtained according to the deformation amount.

[0115] The voltage signal in the power signal controls the magnetic force of the electromagnet, including the following steps:

[0116] The PWM module changes the voltage by changing the power.

[0117] The change in the magnitude of the voltage controls the magnitude of the magnetic force of the electromagnet.

[0118] Embodiment 5:

[0119] The present invention provides a measuring method of an electronically controlled handgrip dynamometer, comprising the following steps:

[0120] When the U-shaped steel belt bends and the angular position sensor senses the change of the U-shaped steel belt, the electronic control module obtains the magnitude of the magnet repulsion force;

[0121] According to the magnitude of the magnet repulsion and the magnitude of the strain force compensation of the U-shaped steel belt bending, the grip force standard value is calculated; wherein the calculation formula of the grip force standard value is:

[0122] F=F1+F2, where F is the standard value of the grip force, F1 is the magnet repulsion force, and F2 is the strain force compensation value.

[0123] For example, the display shows the magnitude of the repulsive force between the electromagnet and the permanent magnet caused by electromagnetic induction. Because the bending of the U-shaped steel belt requires overcoming a certain force, which is called the strain force compensation value, when the patient holds the two magnets, the forces applied are two kinds of forces, one is the repulsive force between the two magnets, and the other is the force applied to bend the U-shaped steel belt. Since the force displayed on the screen is read by the MCU microcontroller from the electromagnet, only the electromagnet is displayed. In fact, the final standard value must be added with the value of the strain force compensation force to be the actual force applied by the patient.

[0124] The method for generating the magnitude of the repulsive force of a magnet by an electric control module comprises the following steps:

[0125] The MCU converts the resistance signal into a resistance duty cycle signal, and sends the resistance duty cycle signal to the PWM module;

[0126] The PWM module obtains the resistance duty cycle signal and converts the resistance duty cycle signal into a power signal;

[0127] The voltage signal in the power signal controls the magnetic force of the electromagnet.

[0128] For example, a sliding resistor generates a resistance value for the MCU, which reads the resistance value and converts it into a duty cycle and sends it to the PWM module; the PWM module controls the voltage across the electromagnet according to the duty cycle value.

[0129] Displaying the magnitude of the magnetic repulsion of the electric control module on a display screen includes the following steps:

[0130] The IO port of the MCU microcontroller obtains the magnetic force of the electromagnet;

[0131] The magnitude of the magnetic force is sent to the display screen.

[0132] In some embodiments of the present invention, when the U-shaped steel belt is bent and the angular position sensor senses the change of the U-shaped steel belt, the magnitude of the magnet repulsion of the electric control module is displayed on the display screen.

[0133] In some embodiments of the present invention, the strain force compensation magnitude of bending the U-shaped steel strip is calibrated.

[0134] The method for calibrating the strain force compensation size includes the following steps:

[0135] Remove the electromagnet and permanent magnet on the U-shaped structure, hold the U-shaped steel strip for multiple times, and obtain the deformation of the U-shaped steel strip multiple times;

[0136] The strain force compensation magnitude is obtained according to the deformation amount.

[0137] For example, after the coil is wound and the magnetic core is prepared, it is energized to become an electromagnet. After the power is turned on, a permanent magnet is used to push it. In the absence of a steel belt, the two magnets are simply repelled from each other to measure the force. This force is actually the magnitude of our repulsive force, and the magnitude of the repulsive force is calibrated in this way. The formula can be used for calibration, which gives a range. After this is done, we put the U-shaped steel belt on and measure it again. The force measured again will definitely be greater than that force, because it overcomes the deformation force of the steel belt. The difference between the two forces is actually the compensation value of its strain stress.

[0138] In addition, there is another situation that can also compensate for the strain force. This is because our deformation is very small. If the deformation is very small, the deformation of the steel strip or the U-shaped structure is 1 mm or 2 mm. The size can be calibrated. Remove the electromagnet and permanent magnet on the U-shaped structure, hold the U-shaped steel strip several times in a row, and obtain the deformation of the U-shaped steel strip multiple times. Remove the electromagnet and the permanent magnet, and then have someone press it directly. If the deformation is 2 mm or 1 mm, how much force is needed for the steel plate to deform? After obtaining the deformation compensation force, the standard value minus the size of the deformation compensation force is the size of the repulsive force of the electromagnet, and then the repulsive force of the electromagnet is calibrated to the size of the reverse current.

[0139] Both the magnitude of the repulsive force between the magnets and the magnitude of the compensation force for the deformation of the U-shaped steel belt can be calibrated using the above method.

[0140] In some embodiments of the present invention, the single chip microcomputer is connected to the sensor, the variable resistor and the screen, and the single chip microcomputer controls what content is displayed on the screen after reading the data.

[0141] In the present invention, the repulsive force and strain force compensation values ​​are set at the beginning. When the patient clenched his hand, if these two forces were overcome, it means that the standard was met and the recovery was good. Since the magnitude of the repulsive force between the two magnets is related to the positions of the two magnets, an angular displacement sensor is set in the present invention. When the U-shaped steel belt is slightly deformed, it can be sensed. In this way, the positions of the two magnets are related. For the present invention, the error in measuring the patient's grip strength is slight and can be ignored.

[0142] In some embodiments of the present invention, Figure 2 As shown, the electric control module includes:

[0143] Sliding resistor, MCU, PWM module, electromagnet and display;

[0144] Wherein, one end of the sliding resistor is electrically connected to one end of the MCU;

[0145] One end of the MCU is electrically connected to one end of the PWM module;

[0146] The other end of the PWM module is connected to the electromagnet through an electrical signal;

[0147] One end of the MCU is electrically connected to the display.

[0148] The voltage signal in the power signal controls the magnetic force of the electromagnet, including the following steps:

[0149] The PWM module changes the voltage by changing the power.

[0150] The change in the magnitude of the voltage controls the magnitude of the magnetic force of the electromagnet.

[0151] In some embodiments of the present invention, the MCU converts the resistance signal into a resistance duty cycle signal, and sends the resistance duty cycle signal to the PWM module, further comprising the following steps:

[0152] The IO port of the MCU single-chip computer obtains the resistance signal of the sliding rheostat, converts the resistance signal into a resistance duty cycle signal, and sends the resistance duty cycle signal to the PWM module through the IO port.

[0153] In some embodiments of the present invention, the client includes the following steps:

[0154] Get the magnetic force of the electromagnet;

[0155] The magnitude of the magnetic force is displayed on a display screen.

[0156] like Figure 1 As shown, an electric-controlled handgrip dynamometer comprises a U-shaped steel belt 1, wherein the inner sides of each upper end of the U-shaped steel belt 1 are respectively connected with an electromagnet 202 and a permanent magnet 3;

[0157] The inner side of the upper part of the U-shaped steel belt 1 is connected to a second sliding rheostat 6 via a connecting rod 7; the second sliding rheostat 6 is connected to a display via a supporting rod 5;

[0158] A touch plate 4 is provided on one side of the second sliding rheostat 6 , and the touch plate 4 is connected to the connecting rod 7 ; the touch plate 4 is provided with an angular displacement sensor.

[0159] For example, the purpose of setting an angular displacement sensor is that when the U-shaped steel belt is deformed by grasping it with the hand, the inner wall of the U-shaped steel belt will reach the displacement sensor, and the displacement sensor will transmit the signal to the MCU microcontroller, and then the MCU microcontroller will display the data on the display 8 to show the magnitude of the force.

[0160] Manually adjusting the second sliding rheostat will generate an analog value, which will be read by the microcontroller and converted into a duty cycle through the program. The value is sent to the PWM module, which converts the duty cycle value into power and directly controls the power of the electromagnet.

[0161] In the present invention, the magnitude of the magnetic field is proportional to the number of turns of the iron core and the magnitude of the current. The power signal of the PWM module can control the amount of current passing through the spiral coil.

[0162] The electric-controlled handgrip dynamometer and its measuring method realize the use of a combination of a permanent magnet and an electromagnet or an electromagnet and an electromagnet, overcomes the problem of deformation caused by using a spring, and adopts such a combination to improve the accuracy of the handgrip dynamometer and extend its service life; adopts a sliding rheostat mode, can adjust the current size, thereby changing the magnetic force of the electromagnet, which can be suitable for adults and children according to the grip strength of different age groups, and can adjust the knob resistance of the sliding rheostat in a targeted manner to control the size of the magnetic force, so as to better detect patients of different age groups with different grip strengths; adopts the calibration magnet repulsion value and the U-shaped steel belt strain force compensation value, improves the accuracy of the detection value, and can also just detect whether the grip strength meets the standard (the repulsion is set at the beginning, if the grip moves, it meets the standard), providing a new grip strength detection method for medicine.

[0163] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0164] Although the present invention has been described in detail above by general description, specific implementation methods and experiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A handgrip dynamometer, comprising a grippable U-shaped handle, wherein the open end of the U-shaped handle is connected to a magnetic damping assembly (2), characterized in that: The magnet damping assembly (2) comprises two magnet dampers with the same poles arranged opposite to each other, wherein at least one of the magnet dampers is controlled by a magnet damping control circuit; the magnet damping control circuit comprises a magnet damping electric control circuit or a magnet damping AC circuit; A sensing circuit, wherein the sensing circuit comprises at least a sensing component and a power supply.

2. A handgrip dynamometer according to claim 1, characterized in that: The magnet damping electric control circuit comprises a sliding rheostat, an MCU single chip computer, a PWM module, an electromagnet, a first power supply and a first display.

3. A handgrip dynamometer according to claim 1, characterized in that: The magnet damping AC circuit comprises an electrically connected coil (21), a switch (22), a first power source (23) and a first sliding rheostat (24).

4. A handgrip dynamometer according to claim 1, characterized in that: The sensing component includes an angular displacement sensor and a second display that are electrically connected.

5. A handgrip dynamometer according to claim 1, characterized in that: The sensing component comprises an electrically connected indicator light (31) and a contact switch (32).

6. A method for measuring a hand dynamometer, applied to a hand dynamometer as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: The magnet damping control circuit is closed; wherein, when the magnet damping control circuit is a magnet damping electric control circuit, the second sliding rheostat is adjusted within a threshold range; Holding the U-shaped handle, the magnets in the magnet damping assembly (2) are brought close; The sensing circuit is closed, and the first display shows the gripping force or the indicator light (31) turns on.

7. The measuring method of a handgrip dynamometer according to claim 6, characterized in that: The magnet damping control circuit is closed, comprising the following steps: Turn on the power supply to adjust the resistance value of the second sliding rheostat; The IO port of the MCU receives the resistance signal of the second sliding resistor, converts the resistance signal into a resistance duty cycle signal, and sends the resistance duty cycle signal to the PWM module through the IO port; The PWM module obtains the resistance duty cycle signal and converts the resistance duty cycle signal into a power signal; The voltage signal in the power signal controls the magnetic force of the electromagnet.

8. The measuring method of a handgrip dynamometer according to claim 6, characterized in that: The first display displays grip strength, further comprising the following steps: When the U-shaped steel belt is bent, the angular position sensor senses the change of the U-shaped steel belt, and the electronic control module obtains the magnitude of the repulsive force of the magnet; Compare the magnitude of the magnet repulsion force with the magnitude of the fixed value. If the two are equal, the patient's grip strength meets the standard. The calculation formula for the fixed value is F1=F-F2, where F is the magnitude of the standard grip strength value, F1 is the fixed value, and F2 is the magnitude of the strain force compensation.

9. The measuring method of a handgrip dynamometer according to claim 8, characterized in that: The method for obtaining the size of the strain force compensation comprises the following steps: Remove the electromagnet and permanent magnet on the U-shaped structure, hold the U-shaped steel strip for multiple times, and obtain the deformation of the U-shaped steel strip multiple times; The strain force compensation magnitude is obtained according to the deformation amount.

10. The method for measuring a handgrip dynamometer according to claim 7, characterized in that: The voltage signal in the power signal controls the magnetic force of the electromagnet, comprising the following steps: The PWM module changes the voltage by changing the power. The change in the magnitude of the voltage controls the magnitude of the magnetic force of the electromagnet.

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