CN107101776B - Force measuring method and device and force measuring device - Google Patents
Force measuring method and device and force measuring device Download PDFInfo
- Publication number
- CN107101776B CN107101776B CN201710466060.6A CN201710466060A CN107101776B CN 107101776 B CN107101776 B CN 107101776B CN 201710466060 A CN201710466060 A CN 201710466060A CN 107101776 B CN107101776 B CN 107101776B
- Authority
- CN
- China
- Prior art keywords
- value
- pressure
- air bag
- temperature
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B3/00—Footwear characterised by the shape or the use
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a force measuring method, a force measuring device and a force measuring device, wherein the force measuring method comprises the following steps: acquiring a first gas pressure value in the air bag and a current first gas temperature when the detected pressure acts on the air bag; calculating a pressure difference value between the first gas pressure value and an initial gas pressure value in the air bag when the air bag is in no-load; searching a force measurement correction parameter corresponding to the first gas temperature value in a temperature parameter list; and calculating the pressure value of the air bag according to the air pressure difference value, the force measurement correction parameter and a calibration proportionality coefficient obtained by converting the air pressure difference on the outer surface of the air bag into the internal air pressure difference and calibrating the internal air pressure difference by the standard weight. According to the force measuring method, the force measuring device and the force measuring device, the pressure change of the air bag and the correction of the temperature on the pressure value are utilized to measure the force, the air bag is utilized to manufacture the force measuring device, the using condition is simple, and the force measuring device is convenient to use on intelligent wearable equipment, such as intelligent shoes.
Description
Technical Field
The invention relates to the field of force measurement, in particular to a force measurement method, a force measurement device and a force measurement device.
Background
At present, human health monitoring equipment such as an electronic weighing machine, a body fat instrument and the like is more and more popular in use, and the principle of a general electronic scale is as follows: when the object to be weighed is placed on a horizontal weighing platform, the weight of the object is transmitted to the weighing sensor through the weighing platform, and the sensor generates a force-electricity effect, so that the weight of the object is converted into an electric signal (voltage or current and the like) in a certain functional relationship (generally in a direct relationship) with the weight of the object to be weighed. The signal is amplified by an amplifying circuit, filtered and converted into a digital signal by an analog/digital (A/D) converter, and the digital signal is sent to a microprocessor (CPU) for processing and conversion and displaying the weight. The weighing sensors include direct displacement sensors (capacitance type, inductance type, potentiometer type, vibrating wire type, cavity resonator type, etc.) and strain sensors (resistance strain type, acoustic surface resonance type), or sensors utilizing physical effects such as magnetoelasticity, piezoelectricity, piezoresistance, etc., and a resistance strain type sensor and an electric bridge measuring circuit are commonly used. However, the electronic scale for measuring body weight generally has a large volume, has certain requirements on use conditions, and is not suitable for being used on intelligent wearable equipment.
Disclosure of Invention
The invention mainly aims to provide a force measuring method and device and a force measuring device for measuring force by utilizing an air bag.
In order to achieve the above object, the present invention provides a force measuring method, including:
acquiring a first gas pressure value in the air bag and a current first gas temperature when the detected pressure acts on the air bag;
calculating a pressure difference value between the first gas pressure value and an initial gas pressure value in the air bag when the air bag is in no-load; searching a force measurement correction parameter corresponding to the first gas temperature value in a temperature parameter list;
and calculating the pressure value of the air bag according to the air pressure difference value, the force measurement correction parameter and a calibration proportionality coefficient, wherein the calibration proportionality coefficient is a coefficient obtained by converting the pressure on the outer surface of the air bag into the pressure difference inside the air bag and calibrating the preset weight.
Further, the step of obtaining a first gas pressure value in the airbag and a current first gas temperature when the measured pressure acts on the airbag is preceded by the step of:
acquiring an initial gas pressure value and a second gas temperature value when the air bag is in no-load;
judging whether the initial gas pressure value and the second gas temperature value are within preset range values or not;
if so, carrying out initial pressure zero setting treatment;
if not, alarming.
Further, after the step of calculating the pressure value applied to the airbag according to the air pressure difference value, the force measurement correction parameter and the calibration proportionality coefficient, the method comprises the following steps:
and converting the pressure value into an output value of a corresponding unit according to a preset unit conversion formula.
Further, after the step of converting the pressure value into an output value in a corresponding unit according to a preset unit conversion formula, the method includes:
and outputting the output value in a display or voice broadcasting mode.
Further, before the step of obtaining the initial gas pressure value and the second gas temperature value when the airbag is unloaded, the method includes:
and triggering a starting command through the inductive switch, and starting the air pressure sensor and the temperature sensor for acquiring the air pressure and the air temperature in the air bag.
The invention also provides a force measuring device comprising:
the first acquisition unit is used for acquiring a first gas pressure value in the air bag and a current first gas temperature when the detected pressure acts on the air bag;
the calculation searching unit is used for calculating a gas pressure difference value between the first gas pressure value and an initial gas pressure value in the air bag when the air bag is in no load; searching a force measurement correction parameter corresponding to the first gas temperature value in a temperature parameter list;
and the pressure calculating unit is used for calculating the pressure value borne by the air bag according to the air pressure difference value, the force measurement correction parameter and a calibration proportionality coefficient, wherein the calibration proportionality coefficient is a coefficient obtained by converting the pressure on the outer surface of the air bag into the pressure difference inside the air bag and calibrating the air pressure difference by preset weight.
Further, the force measuring device further comprises:
the second acquisition unit is used for acquiring an initial gas pressure value and a second gas temperature value when the air bag is in no-load;
the judging unit is used for judging whether the initial gas pressure value and the second gas temperature value are within preset range values or not;
the first judgment execution unit is used for carrying out initial pressure zero adjustment processing if the initial gas pressure value and the second gas temperature value are both within a preset range value;
and the second judgment and designation unit is used for carrying out alarm processing if one of the initial gas pressure value and the second gas temperature value is not in a preset range value.
Further, the force measuring device further comprises:
and the conversion unit is used for converting the pressure value into an output value of a corresponding unit according to a preset unit conversion formula.
Further, the force measuring device further comprises:
and the output unit is used for outputting the output value in a display or voice broadcast mode.
Further, the force measuring device further comprises:
and the triggering starting unit is used for triggering a starting command through the inductive switch to start the air pressure sensor and the temperature sensor for acquiring the air pressure and the air temperature in the air bag.
The present invention also provides a force measuring device comprising:
an airbag for carrying gas;
the air pressure sensor is used for acquiring the air pressure value of the air in the air bag;
the temperature sensor is used for acquiring a gas temperature value of gas in the air bag;
the processor is used for calculating the pressure applied to the air bag according to the gas pressure value and the gas temperature value and converting the pressure into an output value of a specified unit;
an output device for outputting the measurement result of the processor;
and the terminal device is used for displaying or broadcasting the measuring result.
Further, the output device includes a wireless transmission device.
Further, the terminal device comprises a display screen and/or a voice player.
Further, the force-measuring device further includes an inductive switch that controls on/off of a power supply of the force-measuring device.
Further, the air bag is provided with an air hole for inflation and deflation, and the air hole is provided with a valve core.
According to the force measuring method, the force measuring device and the force measuring device, the pressure change of the air bag and the correction of the temperature on the pressure value are utilized to measure the force, the air bag is utilized to manufacture the force measuring device, the using condition is simple, and the force measuring device is convenient to use on intelligent wearable equipment, such as intelligent shoes.
Drawings
FIG. 1 is a schematic flow chart of a force measurement method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a force measurement method according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a force measurement method according to an embodiment of the present invention;
FIG. 4 is a block diagram schematically illustrating the structure of a force measuring device according to an embodiment of the present invention;
FIG. 5 is a block diagram schematically illustrating the structure of a force measuring device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a force-measuring device according to an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, an embodiment of the present invention provides a force measurement method, including:
and S1, acquiring a first gas pressure value in the air bag and a current first gas temperature when the detected pressure acts on the air bag.
In this step, the airbag is a flexible sealed bag made of a high-elastic rubber material or the like, or a part of the airbag is a flexible sealed bag, for example, the upper side and the lower side of the bag are parallel plate-shaped objects, and the peripheral sides of the plate-shaped objects are connected in a sealing manner by a flexible air-impermeable material. The air bag is generally provided with an air inlet and an air outlet, the air inlet is used for filling air into the air bag and is provided with a valve core, and the air outlet is used for connecting an air pressure sensor so that the air pressure sensor acquires the air pressure in the air bag; in another embodiment, the air bag may be provided with only one vent hole, i.e. used as an air inlet, or may be used as an air outlet, and is normally sealed by a collecting end of the air pressure sensor. The first gas pressure value refers to the gas pressure value inside the air bag after an external object acts on the air bag. The first gas temperature value refers to the current temperature value of the compressed gas in the air bag.
S2, calculating a pressure difference value between the first gas pressure value and an initial gas pressure value in the air bag when the air bag is unloaded; and searching a force measurement correction parameter corresponding to the first gas temperature value in a temperature parameter list.
In this step, if the pressure of the external object acting on the airbag is calculated, it is necessary to use the change value of the gas pressure after the external object acts on the airbag, that is, the "difference value between the first gas pressure value and the initial gas pressure value in the airbag when the airbag is unloaded" described in this step. The no-load means that the air bag is kept in a static state, no foreign object presses the air bag, or the air bag is pressed by a specific force, such as the contraction force of the air bag, or the gravity of a tray which is flatly placed on the air bag and contains the object to be measured, and the like. Through the ideal gas state equation PV ═ NRT (P is the gas pressure, V is the volume, N is the amount of the substance, R is the constant, T is the temperature), it can be known that the gas pressure and the gas temperature are positively correlated under a certain volume and amount of the gas substance, so a temperature parameter list is established, in which correction parameters corresponding to different temperatures are set, so as to correct the initial gas pressure value at different temperatures or correct the gas pressure difference value.
And S3, calculating the pressure value of the air bag according to the air pressure difference value, the force measurement correction parameter and the calibration proportionality coefficient.
The calibration proportionality coefficient is a coefficient obtained by converting the pressure of the outer surface of the air bag into the internal air pressure difference and calibrating the preset weight.
In this step, the air pressure difference is a difference between the first air pressure value and an initial air pressure value of the airbag at a certain temperature when the airbag is unloaded, so that the air pressure difference needs to be corrected by a force measurement correction parameter, the corrected air pressure difference is a pressure value generated by the measured pressure, although the measured pressure may be generated by a part of an external object acting on the outer surface of the airbag, the entire elastic outer surface of the airbag is subjected to extrusion under the condition of being full of air, and thus, a specific pressure can be obtained according to a formula P F/S (F is pressure, P is pressure, and S is area).
However, since the irregularity of the outer surface area S of the balloon is difficult to measure or calculate, a calibration scale factor is introduced in this embodiment in which the outer surface pressure of the balloon is converted into an internal air pressure difference, which is calibrated by a standard weight. Specifically, the pressure of the same volume of the sealing gas with the same mass is proportional to the temperature, so the pressure at the temperature of T1 is converted into the pressure P1' at the initial temperature of T0, which is P1x (T0/T1), where P1 is the pressure measured by the pressure sensor at the temperature of T1, and T0 is the initial temperature of the empty air bag. The pressure difference when the bladder is under pressure and at a temperature T0 is P1' -P0, where P0 is the initial pressure corresponding to the initial temperature T0, and in order to maintain the force balance, the surface force added by the pressure difference is proportional to the pressure F added by the bladder surface (neglecting the change of the external atmospheric pressure of the bladder during the test), that is: p1x (T0/T1) -P0 ═ KF, i.e.: f is T0/K (P1/T1-P0/T0), and the measured weight F is obtained by the above formula, where F is a pressure after temperature correction.
It should be noted that the calibration proportionality coefficient when K is at the temperature T0 can be obtained through experiments, for example, when the airbag leaves the factory, at the temperature T0, by adding a weight of F1, it is calculated by the formula F1 ═ K (P measurement — P0), i.e., K ═ F1/(P measurement-P0), where the weight is a preset weight, i.e., F1 is known; the P measurement can be directly read by an air pressure sensor, the P measurement is the air pressure value measured by the air pressure sensor when the temperature is T0 by adding a weight with the weight of F1; p0 is the initial air pressure value measured by the air pressure sensor (i.e. the air pressure value measured by the air pressure sensor when the air bag is empty and at the temperature T0).
Referring to fig. 2, in the present embodiment, before the step S1 of acquiring the first gas pressure value and the current first gas temperature in the airbag when the measured pressure acts on the airbag, the method includes:
s101, acquiring an initial gas pressure value and a second gas temperature value when the air bag is in no-load;
s102, judging whether the initial gas pressure value and the second gas temperature value are in a preset range value or not;
s103, if yes, carrying out initial pressure zero setting processing;
and S104, if not, performing alarm processing.
As described in the above steps S101 to S104, that is, in the process of zeroing the initial pressure value, it is necessary to determine whether the initial pressure value is in a permitted condition for zeroing, and if the initial pressure value is in the permitted condition, zeroing is performed, otherwise, an alarm is given. The second gas temperature is a gas temperature in the airbag when no pressure is applied to the airbag, or a gas temperature in the airbag when the airbag is pressed by a specific force such as a contraction force of the airbag itself, or a weight of a tray placed on the airbag to contain a measurement object. The second gas temperature value is the same as or similar to the atmospheric gas temperature. The preset range of the initial gas pressure value and the preset range of the second gas temperature value are positively correlated, for example, if the second gas temperature value is normal and the initial gas pressure value is much smaller than the preset range, there are three possibilities: the first possibility is that the air pressure in the air bag is low, the second possibility is that the air pressure sensor is damaged, and the third possibility is that the temperature sensor is damaged; for another example, if the initial gas pressure value is normal and the second gas temperature value is much less than its preset range, there are two possibilities: the first may be a damaged air pressure sensor, the second may be a damaged temperature sensor, etc. And only if the initial gas pressure value and the second gas temperature value are within the preset range value, the airbag, the air pressure sensor and the temperature sensor are in normal states, and the measured pressure can be accurately measured. The initial air pressure value of the air bag also influences the use comfort and the measurement accuracy. When the air pressure is low, the air bag is deformed greatly by external force, so that the internal volume and the surface area of the air bag are changed, and certain nonlinearity is generated to influence the measurement precision. Therefore, the no-load initial air pressure value of the air bag needs to meet certain requirements, and is generally slightly larger than the atmospheric pressure by 10-30%. If the initial air pressure in the air bag is too large, the requirement on the strength of the air bag material is high, the measuring range of the air pressure sensor is also improved, and the comfort is poor.
Referring to fig. 3, in this embodiment, after the step S3 of calculating the pressure value applied to the airbag according to the air pressure difference value, the force measurement correction parameter, and the calibration proportionality coefficient obtained by converting the external surface pressure of the airbag into the internal air pressure difference and calibrating the standard weight, the method includes:
and S4, converting the pressure value into an output value corresponding to a unit according to a preset unit conversion formula.
In the step, in daily life, people have different habits on the unit of the weighing result when weighing. For example, Chinese habits translate forces into jin, kg units, etc., while Western habits translate forces into pounds, etc. Different users can customize output units, so that the user can use the system conveniently, and the user experience is improved.
In this embodiment, after the step S4 of converting the pressure value into the output value corresponding to the unit according to the preset unit conversion formula, the method includes:
and S5, outputting the output value in a display or voice broadcasting mode.
In this step, the user can obtain the measurement result conveniently. The display can be directly displayed on the measuring device, and the measuring result can also be sent to a designated mobile terminal for displaying.
In this embodiment, before the step S101 of obtaining the initial gas pressure value and the second gas temperature value when the airbag is unloaded, the method includes:
and S101', triggering a starting command through an inductive switch, and starting an air pressure sensor and a temperature sensor for acquiring the air pressure and the air temperature in the air bag.
In this embodiment, the inductive switch includes, for example, a mechanical trigger switch, a photosensitive inductive switch, and the like. The pressure sensor and the air pressure sensor are triggered and started through the inductive switch, so that the use is convenient.
According to the force measuring method provided by the embodiment of the invention, the pressure change of the air bag and the correction of the temperature on the pressure value are utilized to measure the force, the air bag is utilized to manufacture the force measuring device, the using condition is simple, and the force measuring device is convenient to use on intelligent wearable equipment, such as intelligent shoes.
Referring to fig. 4, an embodiment of the present invention further provides a force measuring device, including:
the first acquiring unit 10 is used for acquiring a first gas pressure value in the air bag and a current first gas temperature when the detected pressure acts on the air bag.
In the first acquiring unit 10, the air bag is a flexible sealed bag made of a high elastic rubber material or the like, or a partially flexible sealed bag, for example, the bag is formed of parallel plates on the upper and lower sides, and the peripheral sides of the plates are hermetically connected by a flexible gas impermeable material. The air bag is generally provided with an air inlet and an air outlet, the air inlet is used for filling air into the air bag and is provided with a valve core, and the air outlet is used for connecting an air pressure sensor so that the air pressure sensor acquires the air pressure in the air bag; in another embodiment, the air bag may be provided with only one vent hole, i.e. used as an air inlet, or may be used as an air outlet, and is normally sealed by a collecting end of the air pressure sensor. The first gas pressure value refers to the gas pressure value inside the air bag after an external object acts on the air bag. The first gas temperature value refers to the current temperature value of the compressed gas in the air bag. When measuring the measured pressure, the physical quantities acquired by the above-described air pressure sensor and temperature sensor are received by the first acquisition unit 10.
A calculation and search unit 20, configured to calculate a pressure difference value between the first gas pressure value and an initial gas pressure value in the airbag when the airbag is empty; and searching a force measurement correction parameter corresponding to the first gas temperature value in a temperature parameter list.
In the calculation and search unit 20, if the pressure of the external object acting on the airbag is calculated, it is necessary to use a variation value of the gas pressure after the external object acts on the airbag, that is, "a gas pressure difference value between the first gas pressure value and the initial gas pressure value in the airbag when the airbag is empty". The no-load means that the air bag is kept in a static state, no foreign object presses the air bag, or the air bag is pressed by a specific force, such as the contraction force of the air bag, or the gravity of a tray which is horizontally placed on the air bag and contains the object to be measured, and the like. Through the ideal gas state equation PV ═ NRT (P is the gas pressure, V is the volume, N is the amount of the substance, R is the constant, T is the temperature), it can be known that the gas pressure and the gas temperature are positively correlated under a certain volume and amount of the gas substance, so a temperature parameter list is established, in which correction parameters corresponding to different temperatures are set, so as to correct the initial gas pressure value at different temperatures or correct the gas pressure difference value.
And the pressure calculating unit 30 is used for converting the air pressure difference, the force measurement correction parameters and the surface pressure of the air bag into a calibration proportionality coefficient of the internal air pressure difference calibrated by standard weight, and the pressure value borne by the air bag.
In the pressure calculating unit 30, the air pressure difference is a difference between the first air pressure value and an initial air pressure value when the air bag is unloaded at a certain temperature, so that the air pressure difference needs to be corrected by a force measurement correction parameter, the corrected air pressure difference is a pressure value generated by the measured pressure, although the measured pressure may be generated by a part of an external object acting on the outer surface of the air bag, the air bag bears extrusion on the whole elastic outer surface under the condition of being filled with air, and a specific pressure can be obtained according to a formula P of F/S (F is the pressure, P is the pressure, and S is the area).
However, since the irregularity of the outer surface area S of the balloon is difficult to measure or calculate, a calibration scale factor is introduced in this embodiment in which the outer surface pressure of the balloon is converted into an internal air pressure difference, which is calibrated by a standard weight. Specifically, the pressure of the same volume of the sealing gas with the same mass is proportional to the temperature, so the pressure at the temperature of T1 is converted into the pressure P1' at the initial temperature of T0, which is P1x (T0/T1), where P1 is the pressure measured by the pressure sensor at the temperature of T1, and T0 is the initial temperature of the empty air bag. The pressure difference at the temperature T0 when the bladder is pressurized is P1' -P0, where P0 is the initial pressure corresponding to the initial temperature T0, and in order to maintain the equilibrium of the forces under the same surface area of the bladder, the surface force added by this pressure difference is proportional to the pressure F added by the surface of the bladder (ignoring the change in the atmospheric pressure outside the bladder during the test), i.e.: p1x (T0/T1) -P0 ═ KF, i.e.: f is T0/K (P1/T1-P0/T0), and the measured weight F is obtained by the above formula, where F is a pressure after temperature correction.
It should be noted that the calibration proportionality coefficient when K is at the temperature T0 can be obtained through experiments, for example, when the airbag is shipped from a factory, at the temperature T0, by adding a weight of F1, it is calculated by the formula F1 ═ K (P measured-P0), i.e., K ═ F1/(P measured-P0), since the weight is a preset weight, i.e., F1 is known; the P measurement can be directly read by an air pressure sensor, the P measurement is the air pressure value measured by the air pressure sensor when the temperature is T0 by adding a weight with the weight of F1; p0 is the initial air pressure value measured by the air pressure sensor (i.e. the air pressure value measured by the air pressure sensor when the air bag is empty and at the temperature T0).
Referring to fig. 5, in this embodiment, the force measuring device further includes:
a second obtaining unit 101, configured to obtain an initial gas pressure value and a second gas temperature value when the airbag is empty;
the judging unit 102 is configured to judge whether the initial gas pressure value and the second gas temperature value are within preset range values;
a first determination execution unit 103, configured to perform initial pressure zeroing processing if the initial gas pressure value and the second gas temperature value are both within a preset range value;
the second determination unit 104 is configured to perform an alarm process if one of the initial gas pressure value and the second gas temperature value is not within a preset range.
The second obtaining unit 101, the judging unit 102, the first determining executing unit 103, and the second determining and specifying unit 104 work as a process of zeroing the initial pressure value, in the zeroing process, it needs to judge whether the initial pressure value is in a permitted condition of zeroing, if the initial pressure value is in the permitted condition, the zeroing is performed, otherwise, an alarm is given. The second gas temperature is a gas temperature in the airbag when no pressure is applied to the airbag, or a gas temperature in the airbag when the airbag is pressed by a specific force such as a contraction force of the airbag itself, or a weight of a tray placed on the airbag to contain a measurement object. The second gas temperature value is the same as or similar to the atmospheric gas temperature. The preset range of the initial gas pressure value and the preset range of the second gas temperature value are positively correlated, for example, if the second gas temperature value is normal and the initial gas pressure value is much smaller than the preset range, there are three possibilities: the first possibility is that the air pressure in the air bag is low, the second possibility is that the air pressure sensor is damaged, and the third possibility is that the temperature sensor is damaged; for another example, if the initial gas pressure value is normal and the second gas temperature value is much less than its preset range, there are two possibilities: the first may be a damaged air pressure sensor, the second may be a damaged temperature sensor, etc. And only if the initial gas pressure value and the second gas temperature value are within the preset range value, the airbag, the air pressure sensor and the temperature sensor are in normal states, and the measured pressure can be accurately measured. The initial air pressure value of the air bag also influences the use comfort and the measurement accuracy. When the air pressure is low, the air bag is deformed greatly by external force, so that the internal volume and the surface area of the air bag are changed, and certain nonlinearity is generated to influence the measurement precision. Therefore, the no-load initial air pressure value of the air bag needs to meet certain requirements, and is generally slightly larger than the atmospheric pressure by 10-30%. If the initial air pressure in the air bag is too large, the requirement on the strength of the air bag material is high, the measuring range of the air pressure sensor is also improved, and the comfort is poor.
In this embodiment, the force measuring device further includes: the conversion unit 40 is configured to convert the pressure value into an output value in a corresponding unit according to a preset unit conversion formula. The conversion unit 40 is primarily used to convert the force into other corresponding unit values. In daily life, people have different habits on units of weighing results when weighing. For example, Chinese habits translate forces into jin, kg units, etc., while Western habits translate forces into pounds, etc. Different users can customize output units, so that the user can use the system conveniently, and the user experience is improved.
In this embodiment, the force measuring device further includes: and an output unit 50 for outputting the output value in a display or voice broadcast manner. The user can obtain the measuring result conveniently. The display can be directly displayed on the measuring device, and the measuring result can also be sent to a designated mobile terminal for displaying.
In this embodiment, the force measuring device further includes: and the trigger starting unit 105' is used for triggering a starting command through the inductive switch and starting the air pressure sensor and the temperature sensor for acquiring the air pressure and the air temperature in the air bag. The inductive switch includes a mechanical trigger switch, a photosensitive inductive switch, etc. The pressure sensor and the air pressure sensor are triggered and started through the inductive switch, so that the use is convenient.
The force measuring device provided by the embodiment of the invention measures the force by utilizing the air pressure change of the air bag and the correction of the temperature on the pressure value, and the air bag is used for manufacturing the force measuring device, so that the use condition is simple, and the force measuring device is convenient to use on intelligent wearable equipment, such as intelligent shoes.
Referring to fig. 6, an embodiment of the present invention further provides a force measuring device, including: an airbag 100 for carrying a gas; the air pressure sensor 200 is used for acquiring the air pressure value of the air in the air bag 100; a temperature sensor 300 for acquiring a gas temperature value of the gas in the airbag 100; the processor 400 is configured to calculate the pressure applied to the airbag 100 according to the gas pressure value and the gas temperature value, and convert the pressure into an output value of a specified unit; an output device 500 for outputting the measurement result of the processor 400; and the terminal device 600 is used for displaying or broadcasting the measuring result.
In the embodiment, the force measuring device is used for measuring the force by utilizing the air pressure change of the air bag 100 and the correction of the temperature on the pressure value, and the force measuring device manufactured by utilizing the air bag 100 has simple use conditions and is convenient to use on intelligent wearable equipment, such as intelligent shoes.
In this embodiment, the output device 500 includes a wireless transmission device. Such as bluetooth, wifi, 2G, 3G, 4G, 5G, etc.
In this embodiment, the terminal device 600 includes a display screen and/or a voice player, where the display screen may directly display the measurement result, and the voice player may directly broadcast the measurement result.
In this embodiment, the force-measuring device further comprises an inductive switch, and the inductive switch controls on/off of a power supply of the force-measuring device. The inductive switch includes a mechanical trigger switch, a photosensitive inductive switch, etc. The pressure sensor and the air pressure sensor 200 are triggered and started through the inductive switch, and the use is convenient.
In this embodiment, the airbag 100 is provided with an air hole for inflation and deflation, and a valve core is provided on the air hole. The amount of gas in the airbag 100 can be adjusted through the inflation hole and the deflation hole.
In a specific embodiment, the force measuring device is disposed at the sole of the intelligent shoe, the sensing switch of the force measuring device is a mechanical trigger switch, the mechanical trigger switch is disposed on the upper of the intelligent shoe, when the user wears the intelligent shoe, the mechanical trigger switch is triggered to be closed, the force measuring device starts the air pressure sensor 200 and the temperature sensor 300 for collecting the air pressure and the air temperature in the air bag 100, the processor 400 obtains an initial air pressure value and a second air temperature value when the air bag 100 is unloaded, and judges whether the initial air pressure value and the second air temperature value are within a preset range value, if so, initial pressure zeroing processing is performed, and if not, alarm processing is performed. After zero setting is completed, acquiring a first gas pressure value in the airbag 100 when the foot of the human body acts on the airbag 100 through the gas pressure sensor 200 and acquiring a current first gas temperature through the temperature sensor 300, and calculating a gas pressure difference value between the first gas pressure value and an initial gas pressure value in the airbag 100 when the airbag 100 is unloaded; searching a force measurement correction parameter corresponding to the first gas temperature value in a temperature parameter list; calculating the pressure value of the air bag 100 according to the air pressure difference value, the force measurement correction parameter and a calibration proportionality coefficient obtained by converting the air bag outer surface pressure into the internal air pressure difference and calibrating the standard weight; and converting the pressure value into an output value of a corresponding unit according to a preset unit conversion formula, wherein the output value is output in a display or voice broadcast mode.
The force measuring device provided by the invention measures the force by utilizing the air pressure change of the air bag 100 and the correction of the temperature on the pressure value, and the force measuring device is manufactured by utilizing the air bag 100, so that the force measuring device has simple use conditions, and is convenient to use on intelligent wearable equipment, such as intelligent shoes.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A method of measuring force, comprising:
acquiring a first gas pressure value in the air bag and a current first gas temperature when the detected pressure acts on the air bag;
calculating a pressure difference value between the first gas pressure value and an initial gas pressure value in the air bag when the air bag is in no-load; searching a force measurement correction parameter corresponding to the first gas temperature value in a temperature parameter list;
calculating the pressure value of the air bag according to the air pressure difference value, the force measurement correction parameter and a calibration proportionality coefficient, wherein the calibration proportionality coefficient is a coefficient obtained by converting the pressure on the outer surface of the air bag into the pressure difference inside the air bag and calibrating the preset weight;
the measured pressure F is T0/K (P1/T1-P0/T0), wherein K is a calibration proportional coefficient at the temperature T0, T0 is the initial temperature of the air bag when the air bag is unloaded, P0 is the initial pressure value corresponding to the initial temperature T0, P1 is the air pressure value measured by an air pressure sensor at the temperature T1, and P0/T0 is a force measurement correction parameter of the initial gas in the air bag at the temperature T0 when the air bag is unloaded;
before the step of obtaining the first gas pressure value in the air bag and the current first gas temperature when the measured pressure acts on the air bag, the method comprises the following steps:
acquiring an initial gas pressure value and a second gas temperature value when the air bag is in no-load;
judging whether the initial gas pressure value and the second gas temperature value are within preset range values or not;
if so, carrying out initial pressure zero setting treatment;
if not, alarming.
2. A method of measuring force according to claim 1, wherein said step of calculating a pressure value to which said bladder is subjected based on said air pressure difference value, said force measurement correction parameter and said calibration proportionality coefficient, is followed by:
and converting the pressure value into an output value of a corresponding unit according to a preset unit conversion formula.
3. The method of claim 2, wherein said step of converting said pressure value to an output value in corresponding units according to a predetermined unit conversion formula is followed by:
and outputting the output value in a display or voice broadcasting mode.
4. Force measuring method according to claim 1, wherein said step of obtaining an initial gas pressure value and a second gas temperature value at empty load of said air bag is preceded by:
and triggering a starting command through the inductive switch, and starting the air pressure sensor and the temperature sensor for acquiring the air pressure and the air temperature in the air bag.
5. A force measuring device, comprising:
the first acquisition unit is used for acquiring a first gas pressure value in the air bag and a current first gas temperature when the detected pressure acts on the air bag;
the calculation searching unit is used for calculating a gas pressure difference value between the first gas pressure value and an initial gas pressure value in the air bag when the air bag is in no load; searching a force measurement correction parameter corresponding to the first gas temperature value in a temperature parameter list;
the pressure calculation unit is used for calculating the pressure value borne by the air bag according to the air pressure difference value, the force measurement correction parameter and a calibration proportionality coefficient, wherein the calibration proportionality coefficient is a coefficient obtained by converting the outer surface pressure of the air bag into the inner air pressure difference and calibrating the inner air pressure difference by preset weight; calculating the measured pressure F to be T0/K (P1/T1-P0/T0), wherein K is a calibration proportionality coefficient at the temperature of T0, T0 is the initial temperature of the air bag when the air bag is unloaded, P0 is the initial pressure value corresponding to the initial temperature of T0, P1 is the air pressure value measured by an air pressure sensor at the temperature of T1, and P0/T0 is a force measurement correction parameter of the initial gas in the air bag at the temperature of T0 when the air bag is unloaded;
the second acquisition unit is used for acquiring an initial gas pressure value and a second gas temperature value when the air bag is in no-load;
the judging unit is used for judging whether the initial gas pressure value and the second gas temperature value are within preset range values or not;
the first judgment execution unit is used for carrying out initial pressure zero adjustment processing if the initial gas pressure value and the second gas temperature value are both within a preset range value;
and the second judgment and designation unit is used for carrying out alarm processing if one of the initial gas pressure value and the second gas temperature value is not in a preset range value.
6. The force measuring device of claim 5, further comprising:
and the conversion unit is used for converting the pressure value into an output value of a corresponding unit according to a preset unit conversion formula.
7. The force measuring device of claim 5, further comprising:
and the triggering starting unit is used for triggering a starting command through the inductive switch to start the air pressure sensor and the temperature sensor for acquiring the air pressure and the air temperature in the air bag.
8. A force-measuring device, comprising:
an airbag for carrying gas;
the air pressure sensor is used for acquiring the air pressure value of the air in the air bag;
the temperature sensor is used for acquiring a gas temperature value of gas in the air bag;
the processor is used for calculating the pressure applied to the air bag according to the gas pressure value and the gas temperature value and converting the pressure into an output value of a specified unit; calculating the measured pressure F ═ T0/K (P1/T1-P0/T0), wherein K is a calibration proportionality coefficient at the temperature T0, T0 is the initial temperature of the air bag when the air bag is unloaded, P0 is the initial pressure value corresponding to the initial temperature T0, and P1 is the air pressure value measured by an air pressure sensor at the temperature T1; acquiring an initial gas pressure value and a second gas temperature value of the air bag in no-load, judging whether the initial gas pressure value and the second gas temperature value are in a preset range value, if so, carrying out initial pressure zero setting processing, and if not, carrying out alarm processing;
an output device for outputting the measurement result of the processor;
and the terminal device is used for displaying or broadcasting the measuring result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710466060.6A CN107101776B (en) | 2017-06-19 | 2017-06-19 | Force measuring method and device and force measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710466060.6A CN107101776B (en) | 2017-06-19 | 2017-06-19 | Force measuring method and device and force measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107101776A CN107101776A (en) | 2017-08-29 |
| CN107101776B true CN107101776B (en) | 2020-01-21 |
Family
ID=59660594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710466060.6A Active CN107101776B (en) | 2017-06-19 | 2017-06-19 | Force measuring method and device and force measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107101776B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108955979A (en) * | 2018-07-09 | 2018-12-07 | 刘明亮 | Device, Monitoring on Earth Pressure system and method for soil pressure detection |
| CN111067763A (en) * | 2018-10-18 | 2020-04-28 | 北京大艾机器人科技有限公司 | Pressure detection device for exoskeleton robot |
| CN112611125B (en) * | 2020-12-18 | 2023-02-17 | 新奥数能科技有限公司 | Refrigerant parameter correction method and device |
| CN116158800B (en) * | 2023-02-15 | 2024-07-12 | 乐普（北京）医疗器械股份有限公司 | Coronary sinus pulse saccule control method and control device |
| CN116671964A (en) * | 2023-05-30 | 2023-09-01 | 无锡海斯凯尔医学技术有限公司 | Pressure correction method of elastic detection probe, elastic detection probe and system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1151267A (en) * | 1995-12-06 | 1997-06-11 | 黄瑞孟 | Shoes capable of measuring body weight |
| US5922966A (en) * | 1996-03-28 | 1999-07-13 | Ami Co. Ltd | Air-pack type contact pressure measuring method |
| CN103196527A (en) * | 2012-12-28 | 2013-07-10 | 中山市永衡日用制品有限公司 | Inflatable electronic balance |
| CN203366410U (en) * | 2013-06-28 | 2013-12-25 | 郑州森鹏电子技术有限公司 | Novel public transport passenger flow monitoring system |
| CN203988057U (en) * | 2014-07-31 | 2014-12-10 | 黄春福 | A kind of fracture recovering footwear with pressure instruction |
| CN105938028B (en) * | 2016-05-17 | 2019-03-29 | 东北农业大学 | A kind of wireless soil pressure sensor based on Pressure monitoring method |
-
2017
- 2017-06-19 CN CN201710466060.6A patent/CN107101776B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107101776A (en) | 2017-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107101776B (en) | Force measuring method and device and force measuring device | |
| US8387437B2 (en) | Weight applying unit for calibration and weight applying method for calibration | |
| CN100542480C (en) | Blood pressure measuring device and blood pressure measuring method | |
| US20180344210A1 (en) | Extensible Wearable Weight Scale and Sensor System | |
| US20090076756A1 (en) | Weight measuring apparatus | |
| US20090088661A1 (en) | Biometric apparatus | |
| Nicolopoulos et al. | Evaluation of the gait analysis FSCAN pressure system: clinical tool or toy? | |
| CN106994015A (en) | Height detection method and device and the method and system that body fat rate is detected according to height | |
| CN105640557B (en) | Load detection device and device of walking aid | |
| US20210080317A1 (en) | Extensible wearable weight scale and sensor system | |
| US6570395B2 (en) | Portable grain moisture meter | |
| WO2019042904A1 (en) | A monitoring device for monitoring breast milk consumption | |
| US20180242684A1 (en) | Foot protection device | |
| JPH0518810A (en) | Portable body weight meter and checking method for health using same | |
| CN103690155A (en) | Pneumatic electronic sphygmomanometer | |
| US20150107338A1 (en) | Pressure Measurement Device and Method | |
| EP3469980A1 (en) | A monitoring device for monitoring breast milk consumption | |
| CN107121179A (en) | A kind of wide-range air bag poidometer | |
| CN211066622U (en) | Weight detecting system | |
| North et al. | Sensor packaging design for continuous underfoot load monitoring | |
| CN111493454B (en) | Weight measurement insole, shoe, system and weight measurement method | |
| RU75738U1 (en) | ELECTRONIC ELECTRONIC FLOOR SCALES FOR MONITORING THE BODY WEIGHT DISTRIBUTION IN A PERSON STANDING ON THEM | |
| CN207007289U (en) | A kind of wide-range air bag poidometer | |
| TWI361272B (en) | Gasbag weight-measuring apparatus | |
| JP6676915B2 (en) | Blood pressure measurement device, blood pressure measurement system, and blood pressure measurement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210926 Address after: 518000 201, No.26, yifenghua Innovation Industrial Park, Xinshi community, Dalang street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen waterward Information Co.,Ltd. Address before: 518000 B, 503, 602, digital city building, garden city, 1079 Shekou Road, Shekou, Nanshan District, Shenzhen, Guangdong. Patentee before: SHENZHEN WATER WORLD Co.,Ltd. |