CN113729637A - Fingerstall device for real-time air pressure tracking and air pressure tracking method - Google Patents
Fingerstall device for real-time air pressure tracking and air pressure tracking method Download PDFInfo
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- CN113729637A CN113729637A CN202111147497.6A CN202111147497A CN113729637A CN 113729637 A CN113729637 A CN 113729637A CN 202111147497 A CN202111147497 A CN 202111147497A CN 113729637 A CN113729637 A CN 113729637A
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6825—Hand
- A61B5/6826—Finger
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Abstract
The invention relates to a fingerstall device and a method for tracking air pressure in real time, wherein the fingerstall device comprises: the device comprises an air bag, a finger sleeve shell, a controller, an inflating unit, a deflating unit and an air pressure sensor; the air bag is positioned at the inner side of the finger sleeve shell; the inflation unit is communicated with the air bag and is used for inflating the air bag; the air discharging unit is connected with the air bag and used for discharging air in the air bag; the air bag is used for pressurizing the fingers through the gas filled in the air bag; the air pressure sensor is used for acquiring a pressure signal of the air bag in real time and sending the pressure signal to the controller; and the controller is respectively in control connection with the inflation unit and the deflation unit and is used for controlling the opening and closing of the inflation unit and the deflation unit according to the magnitude relation between the pressure signal and the set pressure threshold. The air pressure in the air bag is monitored in real time through the air pressure sensor, the air pressure in the air bag is adjusted in real time through the controller, the inflating unit and the deflating unit, and real-time tracking and self-adaptive adjustment of the air pressure of the finger sleeve are achieved.
Description
Technical Field
The invention relates to the technical field of biological signal detection, in particular to a finger stall device for real-time air pressure tracking and an air pressure tracking method.
Background
At present, carry out the device that noninvasive detection often used to physiological signal in medical science mainly be bandeau, pectoral girdle, sleeve area or wrist strap, the user can receive stronger oppression sense when using, and the use is felt relatively poor to there is not the dactylotheca that can self-adaptation suppression to appear yet, in addition, has invasive physiological signal detection mode to need carry out the pipe intubate, can bring very big infection risk for the user. Therefore, how to design a finger cot capable of realizing real-time tracking of air pressure is an urgent problem to be solved for the field of non-invasive real-time monitoring of physiological signals.
Disclosure of Invention
The invention aims to provide a fingerstall device for tracking air pressure in real time and an air pressure tracking method, which can adaptively adjust the air pressure of the fingerstall.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a finger stall device for tracking air pressure in real time, which comprises: the device comprises an air bag, a finger sleeve shell, a controller, an inflating unit, a deflating unit and an air pressure sensor; the air bag is positioned at the inner side of the finger sleeve shell;
the inflation unit is communicated with the air bag and is used for inflating the air bag;
the air discharging unit is connected with the air bag and used for discharging the air in the air bag;
the air bag is used for pressurizing the fingers through the gas filled in the air bag;
the air pressure sensor is used for acquiring a pressure signal of the air bag in real time and sending the pressure signal to the controller;
the controller is respectively in control connection with the inflation unit and the deflation unit and is used for controlling the opening and closing of the inflation unit and the opening and closing of the deflation unit according to the magnitude relation between the pressure signal and the set pressure threshold value.
Optionally, the number of the finger sleeve shells is at least two; the diameters of all the finger sleeve shells are different so as to adapt to fingers with different sizes.
Optionally, the balloon comprises a balloon groove and an airway;
the air bag groove surrounds the inner side of the finger sleeve shell and is used for storing gas;
the air passage is communicated with the air bag groove and is used for providing a passage for air to enter and flow out of the air bag groove.
Optionally, the airbag slots include a first airbag slot, a second airbag slot, and a third airbag slot;
the first airbag groove, the second airbag groove and the third airbag groove are communicated.
Optionally, when the air bags are filled with air, the included angle between the connecting line of the center of the first air bag groove and the center of the cross section of the finger sleeve and the included angle between the connecting line of the center of the second air bag groove and the center of the cross section of the finger sleeve form a first preset angle;
a connecting line between the center of the second air bag groove and the center of the cross section of the finger sleeve and an included angle between the connecting line between the center of the third air bag groove and the center of the cross section of the finger sleeve form a second preset angle;
the included angle between the connecting line of the center of the first air bag groove and the center of the cross section of the finger sleeve and the connecting line of the center of the third air bag groove and the center of the cross section of the finger sleeve is a third preset angle;
the first preset angle, the second angle and the third preset angle are equal.
Optionally, the airway comprises: an inner port of the air passage and an external air pipe;
the bottom of the air bag is provided with a square hole communicated with the outside; the inner opening of the air passage is connected with the square hole at the bottom of the air bag;
one end of the external air pipe is connected with the air passage inner opening and is connected with the air bag through the air passage inner opening; the other end of the air inlet pipe is connected with the air charging unit, the air discharging unit and the air pressure sensor through a tee joint respectively; the air pressure sensor is used for detecting the air pressure of the air in the air bag led out from the external air pipe.
Optionally, the finger cuff housing further comprises:
the groove is arranged on the inner side of the fingerstall shell;
and the clamping groove is fixed on the groove and used for clamping the external air pipe.
Optionally, the apparatus further comprises:
the finger stall frame is used for placing the finger stall shell.
In order to achieve the above object, the present invention further provides a method for tracking air pressure in real time, wherein the method is based on the finger cot device tracked by air pressure in real time, and the method comprises:
acquiring a pressure signal in the air bag in real time through an air pressure sensor, and sending the pressure signal to the controller;
the controller compares the pressure signal to a set pressure threshold:
if the pressure signal is larger than the set pressure threshold value, the controller controls the deflation unit to be started, and the deflation unit releases the gas of the air bag;
if the pressure signal is smaller than the set pressure threshold value, the controller controls the inflation unit to be started, and the inflation unit inflates air into the airbag;
until the pressure signal of the air bag is equal to the set pressure threshold value.
Optionally, the controller controls the air bleeding unit to bleed air based on a proportional-derivative principle.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a fingerstall device and a method for tracking air pressure in real time, wherein the fingerstall device comprises: the device comprises an air bag, a finger sleeve shell, a controller, an inflating unit, a deflating unit and an air pressure sensor; the air bag is positioned at the inner side of the finger sleeve shell; the inflation unit is communicated with the air bag and is used for inflating the air bag; the air discharging unit is connected with the air bag and used for discharging air in the air bag; the air bag is used for pressurizing the fingers through the gas filled in the air bag; the air pressure sensor is used for acquiring a pressure signal of the air bag in real time and sending the pressure signal to the controller; and the controller is respectively in control connection with the inflation unit and the deflation unit and is used for controlling the opening and closing of the inflation unit and the deflation unit according to the magnitude relation between the pressure signal and the set pressure threshold. The air pressure in the air bag is monitored in real time through the air pressure sensor, the air pressure in the air bag is adjusted in real time through the controller, the inflating unit and the deflating unit, and real-time tracking and self-adaptive adjustment of the air pressure of the finger sleeve are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural view of a pneumatic real-time tracking finger cot device according to the present invention;
FIG. 2 is a schematic view of the structure of the finger cot device for real-time tracking of air pressure according to the present invention
FIG. 3 is a schematic diagram of the structures of the finger cot frame and the groove of the finger cot device for real-time tracking of air pressure according to the present invention;
fig. 4 is a schematic view of a card slot structure of the finger cot device for real-time tracking of air pressure according to the present invention.
Description of the symbols:
an air bag-1, an air bag groove-11, a first air bag groove-111, a second air bag groove-112 and a third air bag groove-113; an airway-12, an inner opening-121 of the airway and an external trachea-122; a fingerstall shell-2, a groove-21, a clamping groove-22 and an external air pipe placing channel-221; the device comprises a controller-3, an inflation unit-4, a deflation unit-5, an air pressure sensor-6 and a finger stall frame-7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a fingerstall device for tracking air pressure in real time and a tracking method, which can adaptively adjust the air pressure of the fingerstall.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the finger cot device for real-time tracking of air pressure of the present invention comprises: the device comprises an air bag 1, a finger stall shell 2, a controller 3, an inflation unit 4, a deflation unit 5 and an air pressure sensor 6; the air bag 1 is positioned inside the finger stall casing 2.
The inflation unit 4 is communicated with the airbag 1 and used for inflating the airbag 1.
The deflation unit 5 is connected with the air bag 1 and used for releasing the gas in the air bag 1.
The air bag 1 is used for pressurizing the fingers through the gas filled in the air bag.
The air pressure sensor 6 is used for acquiring a pressure signal of the air bag 1 in real time and sending the pressure signal to the controller 3.
The controller 3 is respectively connected with the inflation unit 4 and the deflation unit 5 in a control manner, and is used for controlling the opening and closing of the inflation unit 4 and the opening and closing of the deflation unit 5 according to the magnitude relation between the pressure signal and the set pressure threshold.
Specifically, in the embodiment of the present invention, the inflation unit 4 is an inflator, and the deflation unit 5 is a deflation valve.
In one embodiment of the present invention, the inflator may be a micro inflator and/or an acoustic pump represented by a gas sampling pump and a micro vacuum pump. The air release valve is a proportional valve and/or an electromagnetic valve. The working principle of the technical scheme is as follows: the miniature inflator pump used in the invention is a miniature direct current vacuum pump. The working principle is that the motor makes circular motion, and the diaphragm in the pump makes reciprocating motion through the inclined shaft, so that air in the pump cavity with fixed volume is compressed and stretched to form vacuum (negative pressure), a pressure difference is generated between the pump suction port and the external atmospheric pressure, and gas is pressed (sucked) into the pump cavity and then discharged from the exhaust port under the action of the pressure difference. Just as the suction or exhaust port may create a pressure differential with the outside atmosphere. The air release valve used in the invention is a proportional electromagnetic valve. It is based on the principle of an electromagnetic switching valve: when the power is cut off, the spring directly presses the iron core on the valve seat to close the valve. When the coil is energized, the generated electromagnetic force overcomes the spring force to lift the core, thereby opening the valve. The proportional solenoid valve makes some changes to the structure of the electromagnetic switch valve: at any coil current, a balance is created between the spring force and the electromagnetic force. The magnitude of the coil current or the magnitude of the electromagnetic force will affect the stroke of the plunger and the valve opening, with an ideal linear relationship between the valve opening (flow) and the coil current (control signal). The flow direction of the direct-acting proportional electromagnetic valve is below the valve seat. The medium flows in from below the valve seat, and the acting force of the medium is the same as the electromagnetic force and opposite to the spring force. Therefore, it is necessary to set maximum and minimum flow rate values corresponding to the operating range (coil current) in the operating state. The proportional solenoid valves of the mine fluid are closed when the power is off (NC, normally closed).
The beneficial effects of the above technical scheme are: the micro inflator pump does not need lubricating oil and vacuum pump oil like a large vacuum pump, does not pollute working media, has small volume, low noise and no maintenance, and can continuously work for a long time. The proportional valve can continuously and proportionally control the pressure and the flow of a hydraulic system, realize the control on the position, the speed and the force of an actuating mechanism, and reduce the impact during pressure conversion. And the number of elements is reduced, and the oil circuit is simplified. Compared with other valves, the valve has strong pollution resistance and reliable work.
Further, the number of the finger stall shells 2 is at least two; the diameters of the respective finger stall housings 2 are different to accommodate fingers of different sizes. If only a single finger stall is provided, the finger can be pressed by long-time measurement, blood blockage and blood flow blockage in the finger are caused, and the quality of a detection signal can be greatly influenced. Therefore, the problem can be alleviated by alternately using a plurality of finger stall shells with different sizes and alternately measuring different fingers.
Preferably, as shown in fig. 1, the balloon 1 includes a balloon groove 11 (not shown) and an airway 12.
The air bag groove 11 surrounds the inner side of the finger sleeve shell 2 and is used for storing air.
The gas duct 12 communicates with the bladder groove 11 for providing a passage for gas to enter and exit the bladder groove 11. Specifically, the air passage 12 is located at the bottom of the airbag 11.
Preferably, as shown in fig. 2, the airbag housing 11 includes a first airbag housing 111, a second airbag housing 112, and a third airbag housing 113. The structure that the gasbag divides the groove can reach better oppression effect.
The first, second, and third airbag grooves 111, 112, and 113 communicate with each other. Specifically, a first vent hole is provided at a position intermediate between the first airbag groove 111 and the second airbag groove 112, and a second vent hole is provided at a position intermediate between the second airbag groove 112 and the third airbag groove 113. A square hole is reserved at the bottom end of the right side of the second air bag groove 112 and is used for connecting an external air passage. The three air bag grooves have equal gas capacity and are all made of milk white materials. In this embodiment, the preset thicknesses of the three air bag grooves are 0.15mm +/-0.05 mm.
Further, when the air bags are filled with air, the included angle between the connecting line of the center of the first air bag groove 111 and the center of the cross section of the finger sleeve and the included angle between the connecting line of the center of the second air bag groove 112 and the center of the cross section of the finger sleeve form a first preset angle.
The included angle between the connecting line of the center of the second air bag groove 112 and the center of the cross section of the finger sleeve and the connecting line of the center of the third air bag groove 113 and the center of the cross section of the finger sleeve is a second preset angle.
The included angle between the connecting line of the center of the first air bag groove 111 and the center of the cross section of the finger sleeve and the connecting line of the center of the third air bag groove 113 and the center of the cross section of the finger sleeve is a third preset angle.
The first preset angle, the second preset angle and the third preset angle are equal. In this embodiment, when the air bag is filled with air, the preset included angle of the three air bag grooves is 120 degrees ± 10 degrees. Experiments for many times prove that the fingerstall is inflated based on different compression angles, corresponding physiological signals are measured at the finger, the signal quality at the angle is optimal, the subjective feeling compression effect of a subject is not very strong, and the angle relation of the three air bags is favorable for improving the detection accuracy of the physiological signals under the preset pressure threshold value.
Further, the airway 12 includes: an airway internal port 121 and an external trachea 122.
The bottom of the air bag 1 is provided with a square hole communicated with the outside; the air passage inner opening 121 is connected with a square hole at the bottom of the air bag 1.
One end of the external air pipe 122 is connected with the air passage inner opening 121 and is connected with the air bag 1 through the air passage inner opening 121; the other end is respectively connected with the inflation unit 4, the deflation unit 5 and the air pressure sensor 6 through a three-way interface; the air pressure sensor 6 is used for detecting the air pressure of the air in the air bag 1 led out from the external air pipe 122 and converting an air pressure signal into a resistivity change signal based on a piezoresistive effect. The external air pipe 122 is an air pipe supported by a high-performance polyolefin thermoplastic elastomer (TPE) material, the bottom of the external air pipe 122 is disc-shaped, and the external air pipe is fixed at the inner opening of the air passage after being hot-melted, so that the air tightness of the air passage is ensured.
The working principle of the technical scheme is as follows: when the air pressure sensor 6 is stressed, the energy band changes due to the stress, and the energy of the energy valley moves, so that the resistivity of the air pressure sensor changes.
The beneficial effects of the above technical scheme are: the piezoresistive sensor has high sensitivity and good linearity; the miniaturization and the integration are easy; the structure is simple, the work is reliable, and the performance is kept unchanged after dozens of fatigue tests; the dynamic characteristic is good, and the response frequency is 103-105 Hz. Piezoresistive pressure sensors are used by various industries as a means of measuring pressure.
Further, the finger stall casing 2 further comprises:
a groove 21 is arranged at the inner side of the finger stall casing 2, and the position of the groove 21 is shown in figure 3.
And the clamping groove 22 is fixed on the groove 21 and used for clamping the external air pipe 122. The clamping groove is also provided with a placing channel 221 externally connected with an air pipe, and the structural schematic diagram of the clamping groove is shown in fig. 4.
Further, as shown in fig. 3, the apparatus further includes:
and the finger stall frame 7 is used for placing the finger stall shell 2. Specifically, the finger stall frame 7 is at least provided with two hollow cylindrical finger stall shells which are directly and fixedly connected. Based on the design of a plurality of finger stall shells and the finger stall shell of different models, can alternate the finger when the user uses the finger stall and go on, and can be applicable to the user group of different ages.
In order to achieve the above object, the present invention further provides a method for tracking air pressure in real time, wherein the method is based on the finger cot device tracked by air pressure in real time, and the method comprises:
the pressure sensor is used for acquiring pressure signals in the air bag in real time and sending the pressure signals to the controller.
The controller compares the pressure signal to a set pressure threshold:
if the pressure signal is larger than the set pressure threshold value, the controller controls the deflation unit to be started, and the deflation unit releases the gas of the air bag.
If the pressure signal is smaller than the set pressure threshold value, the controller controls the inflation unit to be started, and the inflation unit inflates air into the airbag.
Until the pressure signal of the air bag is equal to the set pressure threshold value.
Specifically, the controller controls the air bleeding unit to bleed air based on the proportional-derivative principle. In this embodiment, the controller controls the deflation of the deflation valve based on the proportional-integral-derivative (PID) principle. The PID is named in its three correction algorithms. The controlled variable is the result of the addition of three algorithms (proportional, integral, differential), i.e. its output, whose input is the error value (the result of subtracting the measured value from the set value) or a signal derived from the error value. If u (t) is defined as the control output, the PID algorithm can be represented by equation (1):
wherein the content of the first and second substances,Kpis a proportional gain, is an adaptation parameter; kiIs the integral gain, and is also an adaptive parameter; kdIs the differential gain, also an adaptation parameter; e is error, e is set value-feedback value; t is the current time; τ is an integral variable, and the value is from 0 to the current time t.
The PID control is actually PI and PD control. The PID controller calculates the control quantity by using proportion, integral and differential according to the error of the system to control.
Ratio (P) control: proportional control is one of the simplest control methods. The output of the controller is proportional to the input error signal. There is a Steady-state error in the system output when there is only proportional control. The proportion regulation function is as follows: is the deviation of a proportional reaction system, and once the deviation occurs in the system, the proportional adjustment immediately generates an adjusting effect to reduce the deviation. The proportion is large, so that the adjustment can be accelerated, and the error can be reduced, but the stability of the system is reduced and even the system is unstable due to the overlarge proportion.
Integral (I) control: in integral control, the output of the controller is proportional to the integral of the input error signal. For an automatic control system, if there is a Steady-state Error after entering a Steady state, the control system is called as a system with a Steady-state Error or a system with a difference Error for short. To eliminate steady state errors, an "integral term" must be introduced into the controller. The integral term integrates the error over time, increasing with time. Thus, even if the error is small, the integral term increases with time, which drives the output of the controller to increase, further reducing the steady state error until it equals zero. Therefore, the proportional Plus Integral (PI) controller can enable the system to have no steady-state error after the system enters the steady state. Integral adjustment action: the system eliminates steady state error and improves the tolerance. Because of the error, the integral adjustment is carried out until no difference exists, the integral adjustment is stopped, and the integral adjustment outputs a constant value. The strength of the integration depends on the integration time constant Ti, and the smaller Ti, the stronger the integration. Otherwise, if Ti is large, the integral action is weak, and the stability of the system is reduced by adding integral adjustment, so that the dynamic response is slowed down. The integration is often combined with two other regulation laws to form a PI regulator or a PID regulator.
Differential (D) control: in the differential control, the output of the controller is in a proportional relationship with the differential of the input error signal (i.e., the rate of change of the error). The automatic control system may oscillate or even destabilize during the adjustment process to overcome the error. The reason for this is that the presence of a large inertia component (link) or a hysteresis (delay) component has the effect of suppressing the error, the variation of which always lags behind the variation of the error. The solution is to "lead" the change in the effect of the suppression error, i.e. when the error is close to zero, the effect of the suppression error should be zero. That is, it is often not enough to introduce a "proportional" term into the controller, which acts to amplify only the magnitude of the error, but what is needed to be added is a "derivative term" which predicts the trend of the error change, so that the controller with proportional + derivative can make the control action of the error suppression equal to zero or even negative in advance, thereby avoiding the serious overshoot of the controlled quantity. Therefore, for controlled objects with greater inertia or hysteresis, the proportional Plus Derivative (PD) controller can improve the dynamic characteristics of the system during adjustment. Differential regulation action: the derivative effect reflects the rate of change of the system deviation signal, has predictability, and can predict the trend of deviation change, so that the control effect can be generated in advance, and before the deviation is formed, the control effect is eliminated by the derivative regulation effect. Thus, the dynamic performance of the system can be improved. Under the condition that the selection of the differential time is proper, the overshoot can be reduced, and the adjusting time can be reduced. The differential action has amplification effect on noise interference, so that the excessive differential regulation is unfavorable for the interference resistance of the system. In addition, the derivative reacts to the rate of change, and when there is no change in the input, the derivative effect output is zero. The differential action cannot be used alone and needs to be combined with two other regulation laws to form a PD or PID controller.
The beneficial effects of the above technical scheme are:
the controller can realize real-time air pressure tracking for controlling the working states of the inflation pump and the deflation valve, and the deflation based on PID control is in a linear deflation mode, so that the air pressure information loss caused by too fast deflation and unstable deflation can be avoided.
In one embodiment of the invention, the controller acquires the current air pressure value in the finger stall through AD acquisition, stores the current pressure value based on wired communication or wireless communication, and acquires the set pressure threshold value.
The wired communication mode is an SPI communication mode and/or an I2C communication mode, and the wireless communication mode is a Bluetooth communication mode and/or a wireless communication mode.
The beneficial effects of the above technical scheme are: the current pressure value is stored based on wired communication or wireless communication, and the set pressure threshold value is obtained, so that the tracking and the maintenance of the air pressure in the remote operation finger sleeve can be realized, and the time and space cost is reduced.
The invention has the following technical effects;
1) the connection between the air bag and the controller can track the air pressure signal in the finger sleeve in real time and automatically adjust the air pressure signal in real time according to a set threshold value without manually adjusting the pressure in the finger sleeve.
2) The design of draw-in groove has guaranteed the stable steadiness of air flue, and there is not special draw-in groove to place, fragile in current air flue design that is used for the aerating device of signal monitoring.
3) The design of the finger stall air bag enables the finger stall to have an inflating function, and the existing finger stall for detecting physiological signals does not have the inflating function.
4) The controller controls the deflation process of the finger sleeve based on the PID technology, the linear deflation of the air bag can be stably controlled, and the signal capture precision is improved.
5) The threshold value in the controller can be acquired in a wireless mode, and space cost is saved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A finger cot device for real-time tracking of air pressure, the device comprising: the device comprises an air bag, a finger sleeve shell, a controller, an inflating unit, a deflating unit and an air pressure sensor; the air bag is positioned at the inner side of the finger sleeve shell;
the inflation unit is communicated with the air bag and is used for inflating the air bag;
the air discharging unit is connected with the air bag and used for discharging the air in the air bag;
the air bag is used for pressurizing the fingers through the gas filled in the air bag;
the air pressure sensor is used for acquiring a pressure signal of the air bag in real time and sending the pressure signal to the controller;
the controller is respectively in control connection with the inflation unit and the deflation unit and is used for controlling the opening and closing of the inflation unit and the opening and closing of the deflation unit according to the magnitude relation between the pressure signal and the set pressure threshold value.
2. The cuff device for real-time tracking of air pressure according to claim 1, wherein the number of the cuff housings is at least two; the diameters of all the finger sleeve shells are different so as to adapt to fingers with different sizes.
3. The cuff apparatus for real-time tracking of air pressure according to claim 1, wherein the balloon comprises a balloon groove and an air passage;
the air bag groove surrounds the inner side of the finger sleeve shell and is used for storing gas;
the air passage is communicated with the air bag groove and is used for providing a passage for air to enter and flow out of the air bag groove.
4. The cuff apparatus for real-time tracking of air pressure according to claim 3, wherein the balloon grooves comprise a first balloon groove, a second balloon groove and a third balloon groove;
the first airbag groove, the second airbag groove and the third airbag groove are communicated.
5. The finger cot device for real-time tracking of air pressure according to claim 4, wherein when the air bladders are filled with air, an included angle between a connecting line of the center of the first air bladder groove and the center of the cross section of the finger cot and a connecting line of the center of the second air bladder groove and the center of the cross section of the finger cot forms a first preset angle;
a connecting line between the center of the second air bag groove and the center of the cross section of the finger sleeve and an included angle between the connecting line between the center of the third air bag groove and the center of the cross section of the finger sleeve form a second preset angle;
the included angle between the connecting line of the center of the first air bag groove and the center of the cross section of the finger sleeve and the connecting line of the center of the third air bag groove and the center of the cross section of the finger sleeve is a third preset angle;
the first preset angle, the second angle and the third preset angle are equal.
6. The cuff device for real-time tracking of air pressure according to claim 3, wherein the air passage comprises: an inner port of the air passage and an external air pipe;
the bottom of the air bag is provided with a square hole communicated with the outside; the inner opening of the air passage is connected with the square hole at the bottom of the air bag;
one end of the external air pipe is connected with the air passage inner opening and is connected with the air bag through the air passage inner opening; the other end of the air inlet pipe is connected with the air charging unit, the air discharging unit and the air pressure sensor through a tee joint respectively; the air pressure sensor is used for detecting the air pressure of the air in the air bag led out from the external air pipe.
7. The cuff apparatus for real-time tracking of air pressure according to claim 1, wherein said cuff housing further comprises:
the groove is arranged on the inner side of the fingerstall shell;
and the clamping groove is fixed on the groove and used for clamping the external air pipe.
8. The pneumatic pressure real-time tracking finger cot device according to claim 2, further comprising:
the finger stall frame is used for placing the finger stall shell.
9. A real-time tracking method of air pressure, which is based on the finger cot device for real-time tracking of air pressure according to any one of claims 1 to 8, and comprises the following steps:
acquiring a pressure signal in the air bag in real time through an air pressure sensor, and sending the pressure signal to the controller;
the controller compares the pressure signal to a set pressure threshold:
if the pressure signal is larger than the set pressure threshold value, the controller controls the deflation unit to be started, and the deflation unit releases the gas of the air bag;
if the pressure signal is smaller than the set pressure threshold value, the controller controls the inflation unit to be started, and the inflation unit inflates air into the airbag;
until the pressure signal of the air bag is equal to the set pressure threshold value.
10. The real-time tracking method of air pressure as claimed in claim 9, wherein the controller controls the air bleeding unit to bleed air based on the proportional-derivative principle.
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| CN202111147497.6A CN113729637A (en) | 2021-09-29 | 2021-09-29 | Fingerstall device for real-time air pressure tracking and air pressure tracking method |
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