117results about How to "Avoid false triggers" patented technology

The utility model relates to the technical field of man-machine interaction of electronic equipment, and particularly discloses a backlight touch key. The backlight touch key comprises a shell and a plurality of key assemblies, each key assembly comprises a key unit and a touch conduction unit, and each key unit is provided with a first end and a second end which are opposite to each other; the first end is embedded in the shell, the key unit penetrates through the touch conduction unit, the outer surface of the touch conduction unit is provided with a capacitive sensing surface, the capacitive sensing surface is attached to the shell, and the relative position of the shell and the touch conduction unit is fixed. According to the backlight touch key, the specific structure is improved, so that high integration of the structure and simplification of the manufacturing process are realized while the backlight uniformity and the induction sensitivity are ensured.

The utility model discloses a kind of DC mobile energy storage system commercial power wake-up circuit, including power supply electronic circuit;Energy storage delay subcircuit, energy storage delay subcircuit is parallelly connected in power supply electronic circuit;Current amplification subcircuit, current amplification subcircuit includes primary amplification branch and secondary amplification branch, primary amplification branch is parallelly connected in energy storage delay subcircuit, secondary amplification branch is parallelly connected in primary amplification branch;Load filter subcircuit, load filter subcircuit is connected in secondary amplification branch;Wake-up subcircuit, wake-up subcircuit is parallelly connected in load filter subcircuit.The utility model when commercial power is accessed, power supply electronic circuit starts power supply, energy storage delay subcircuit stores energy and delays false trigger, to output charging current is amplified after primary amplification branch, again secondary amplification branch is amplified, filter out ripple by load filter subcircuit, trigger wake-up subcircuit starts to wake up BMS, simplify commercial power power-up wake-up process, to improve operating convenience and wake-up efficiency.

The application discloses a flight control oriented OTA upgrading method, system, device, computer readable storage medium and program product, belongs to the field of computer science and technology, and aims to solve the problems of insufficient safety of an existing upgrading process, unreliable data transmission and weak batch management capability for a heterogeneous architecture. The method establishes a first connection, sends a start request frame containing a specific identification code and an inverse code, sets an upgrading flag and resets the flight control, and disconnects the connection. After resetting, a second connection is established, firmware is transmitted and written, an end request frame with the same frame structure is sent, the flight control is finally reset and starts new firmware, and the connection is disconnected. The frame structure containing the identification code and the inverse code, the instruction code and the check code enhances the communication reliability and the anti-interference capability. The stage resetting and the flag mechanism ensure that the upgrading process is controllable and recoverable, avoids firmware damage or startup failure, and improves the safety and stability of the flight control system remote upgrading.

The present application relates to the technical field of vehicle safety control, and particularly relates to a mine dump truck side and rear overturning prevention control device and a control method thereof, which comprises a pressure detection module, a vehicle speed detection module, a main control module, an execution control module, a power take-off execution module and a power supply module, wherein the power supply module provides working power for each module, the pressure detection module is electrically connected with the main control module, is used for collecting pressure signals of a front axle oil gas spring of the mine dump truck and transmitting the pressure signals to the main control module, and the vehicle speed detection module is communicatively connected with the main control module, is used for collecting vehicle drive shaft speed signals and transmitting the vehicle drive shaft speed signals to the main control module. The present application controls the power take-off to be actively cut off through cooperation of pressure sensing detection and vehicle speed signal judgment, replaces a passive protection mode in the prior art, timely intervenes when the vehicle appears a head lifting or side tilting trend, avoids occurrence of unloading accidents from the source, and greatly improves the safety of mine truck unloading operation.

The utility model relates to the field of beverage bottle lid discloses a beverage bottle lid with press trigger suction accessory falling function, including the cover, the top of cover is provided with the false touch press assembly, the upper portion of cover is provided with the installation mouth, the top of cover is connected with the limit lug of fixed connection and the number is multiple, the false touch press assembly includes the protection cover, the bottom of protection cover is fixedly connected with the control pipe, the inside movable joint of control pipe has the press bar, the outside of control pipe is provided with the auxiliary pipe, the outside fixed connection of auxiliary pipe has the fixed ring, the fixed ring is fixedly connected with the inner wall of installation mouth. In the utility model, through setting false touch press assembly and setting limit lug and limit recess etc. between the cooperation of parts, the bottle cap can be effectively protected, the false trigger of bottle cap in the process of transportation or selling can be effectively avoided, is more practical.

This application discloses a GIS high-voltage switch housing with a safety protection structure for use in the field of high-voltage switches. This switch housing, through the inclusion of a sealing protection mechanism, allows the mechanism to monitor the sealing performance of the main housing. If a problem occurs in the sealing performance of the main housing, leading to SF6 failure... 6 When a gas leak occurs, the trigger board will activate the leak detection switch, causing the alert control module to activate the alarm and alert the staff. This allows staff to detect the gas leak in a timely manner and prompts them to conduct appropriate inspections and maintenance. This provides a protective effect, reducing the impact of problems with the casing's sealing. Furthermore, through the installation of gas sensors and gas analysis modules, when the leak detection switch is triggered, the sealing protection mechanism will also perform a self-check on its internal sealing to prevent false alarms. This avoids misleading staff and greatly improves practicality.

The invention discloses a side slope biomineralization protection system and method based on a double-response type signal capsule, and the method comprises the steps: preparing the double-response type signal capsule, a germination capsule and a reaction capsule respectively, a wall material of the double-response type signal capsule is obtained by mixing poly (N-isopropylacrylamide) and xanthan gum according to a preset proportion; mixing the double-response signal capsule, the germination capsule and the reaction capsule with graded fine sand and chopped basalt fiber to obtain a capsule-aggregate mixture; the capsule-aggregate mixture is laid on the surface of the slope, planting soil is covered, vegetation is planted, and when the preset temperature-water content condition is met, slope time sequence repairing is triggered. According to the scheme, the temperature and the moisture can be responded at the same time, and the complex climatic environment can be accurately adapted.

The utility model relates to a kind of key device, comprising: base, the printed circuit board being set to the base outside, the support framework being elastically set to the base inside and key body, key body is fixedly arranged in the base inside, support framework is clamped between the key body in the base inside, microswitch is set on printed circuit board and from the inside of base and appears from the base of passing through base.Support framework has framework bottom plate and the protruding block that protrudes from framework bottom plate;Key body has pedestal and the longitudinal protruding portion that extends from pedestal towards outside;The inner wall of longitudinal protruding portion and the bottom end of protruding block contact, the top end of protruding block and microswitch contact.The key device of the present application adopts super-long button structure, which is beneficial for blind operation in the position that cannot be seen on the handlebar;And using spring and microswitch structure, it realizes that comfortable pressing feeling and the function of executing on-off trigger signal can be achieved in any position pressing.

This invention discloses a line detection and protection method for grid-type energy storage systems, comprising: online sampling of voltage and current signals of the lines in the grid-type energy storage system; multi-scale decomposition of the sampled signals based on a recursive frequency band decomposition algorithm to obtain the recursive frequency band coefficients of each sub-frequency band; continuous processing of the coefficients in segments using a piecewise fidelity contraction function; extraction of transient characteristic parameters of each frequency band; determination of whether the line is in an abnormal operating state; if abnormal, current analysis of the line in the abnormal operating state, combined with a delay setting strategy to generate protection action commands; and, according to the protection action commands, implementation of current limiting, energy suppression, or isolation operations on the grid-type energy storage system to achieve electrical protection of the line. This invention effectively improves the early detection sensitivity of the line to transient faults and regenerative impacts, reduces the false alarm rate, and achieves rapid fault suppression, electrical isolation, and safe recovery without weakening the grid support capability.

The utility model discloses a rearview mirror anti-dazzling system, which relates to the technical field of rearview mirror anti-dazzling, and comprises a power supply module, a detection module, a control module and a driving module, the power supply module is connected with the detection module, the control module and the driving module, and is used for supplying power to the detection module, the control module and the driving module; the detection module comprises a first light sensor and a second light sensor, the first light sensor is used for detecting the light intensity in front of a vehicle where the rearview mirror is located, and the second light sensor is used for detecting the light intensity behind the vehicle where the rearview mirror is located; the driving module is connected with the control module and the rearview mirror lens; the control module is used for calculating the light intensity difference between the light intensity in front of the vehicle and the light intensity behind the vehicle and controlling the color depth of the rearview mirror lens through the driving module according to the light intensity difference. The system can realize full-automatic rearview mirror glare suppression, and has the advantages of false triggering prevention, low cost and high response speed.

The utility model discloses an intelligent bird repelling device for insulator, include: power module, with main control module electric connection, be used for to main control module power supply, vibration detection module, with main control module electric connection, be used for detecting the vibration signal of bird pecking insulator when, bird module, including sounding unit and light unit, main control module and bird module electric connection, be used for according to vibration signal drive sounding unit and light unit to respectively produce different frequency sound and rhythm change's light to drive bird. The utility model discloses through vibration detection module to detect the vibration signal of bird pecking insulator when, get main control module can according to vibration signal drive sounding unit and light unit respectively produce different frequency sound and rhythm change's light to drive bird, can effectively improve the bird repelling effect, reduce deployment and maintenance cost, through vibration detection module can prevent the false triggering of bird module, reduce operating power consumption, improve the life.

This invention belongs to the technical field of fast reactor installation, commissioning, operation, and routine maintenance, specifically relating to a local alarm device for a distributed sodium leak detector. A switch, power supply, alarm light, display screen, buzzer, and resistance display control meter are connected in series between two wires. The power supply and alarm light are grounded. After startup, tweezers at the end of the wires are used to clamp the two metal wires after the ceramic insulated terminal of the sodium leak detector to begin measurement. If a value is displayed, it indicates a short circuit in the sodium leak wire, and the location of the short circuit is determined. This invention quickly locates the fault point of the sodium leak wire, reducing the time and labor required for disassembling insulation during maintenance.

This invention discloses an infusion device for bone marrow aspiration, belonging to the field of medical device technology. The invention includes a base, a counterweight, and an infusion assembly. The key features are: the base contains multiple pressure sensing mechanisms, a balancing and stabilizing mechanism, and a protective mechanism. The pressure sensing mechanism includes a pressure groove and a sensing piston, connected to a large air reservoir and a small air reservoir; the balancing and stabilizing mechanism includes a balancing groove, a moving slider, a telescopic spring, a stabilizing plate, and a lifting piston. The lifting piston is connected to the moving slider via a traction line, and the small air reservoir is connected to a limiting cavity via an air inlet pipe; the protective mechanism includes a fixed support, a rotating shaft, a protective cloth, and a reinforcing rope. The large air reservoir is connected to an adjusting cavity, and the adjusting piston is driven by the rotating shaft; the rotating shaft is also connected to a limiting assembly for controlling the extension length of the stabilizing plate. This invention achieves dynamic stabilization, intelligent protection, and coordinated adjustment through pneumatic linkage, effectively preventing needle displacement and ensuring infusion safety.

This utility model provides a portable bio-enzyme deodorizing spray device, relating to the field of deodorizing equipment technology. It includes a deodorizing spray assembly with a portable component and a protective component. The deodorizing spray assembly includes a bottle and a spray nozzle. The portable component includes a connecting ring, and second strong magnetic metal rings are symmetrically arranged on the outer side of the connecting ring. In this utility model, the first and second strong magnetic metal rings are magnetically connected, facilitating the attachment of a lanyard to the deodorizing spray assembly. This allows the deodorizing spray assembly to be easily hung on the wrist or neck for convenient use. By pressing the clamp, the elasticity of the torsion spring allows the deodorizing spray assembly to be clipped onto a belt or backpack, eliminating the need to store it in a backpack and allowing for immediate use without searching. This improves the convenience of use and achieves ease of use for the deodorizing spray assembly.

A pull-out sensing structure for a pull-out faucet includes a faucet body, a pull-out tube assembly, a magnet, a Hall sensor, and a solenoid valve. The faucet body has an installation channel, the pull-out tube assembly is movably inserted through the installation channel, the magnet is disposed on the pull-out tube assembly, and the Hall sensor is fixed to the inner wall of the installation channel and spaced relative to the magnet, and is electrically connected to the solenoid valve. When the pull-out tube assembly is pulled out or reset, the relative distance between the magnet and the Hall sensor changes, causing the Hall sensor to output a signal to control the solenoid valve to open or close the water circuit. Because the Hall sensor and magnet are used in conjunction to replace the traditional infrared sensor, false triggering or malfunction caused by environmental factors is avoided, and the sensing stability is improved. At the same time, the pull-out action is directly linked to the water circuit control, achieving "water comes out when pulled out and water turns off when reset" without additional operation, simplifying operation and enhancing functional integration.

The utility model relates to comparator circuit protection technical field discloses the load short circuit protection circuit based on comparator, include: current sampling resistance RS2, first end connects public end, second end ground connection, comparator U13 the opposite phase input end through resistance R106 and electric capacity C67 shunt network connection RS2's public end, the positive phase input end through resistance R107 connects TL431 reference source U14's cathode, TL431 reference source U14's reference pole passes through resistance R111 ground connection, drive chip EG27324. In the utility model, through comparator U13 the direct triggering of B light coupling U10 action, force MCU to shut off drive chip EG27324, and after receiving hardware fault signal, through software filtering algorithm secondary verification load state, simultaneously, three -level hardware filter and software dynamic threshold value compensation, realize the cooperative protection mechanism of hardware fast response and software accurate fault tolerance.

The application relates to the technical field of air conditioner intelligent control, and specifically discloses a multi-heat-exchanger intelligent defrosting control method and device based on multi-parameter fusion and heat load prediction and a storage medium, which comprises the following steps: collecting multi-dimensional operation data; performing feature calculation on the collected original data to obtain fin temperature change rate, evaporation pressure fluctuation rate and air enthalpy difference absolute value; constructing a fuzzy reasoning system to generate a frost formation confidence value; constructing a feedforward neural network model to generate an optimal defrosting cycle prediction value; generating a defrosting trigger instruction or a continuous monitoring instruction according to the confidence interval and the cycle achievement situation; detecting and pre-adjusting the pressure difference between the high-pressure side and the low-pressure side to execute switching between the running heat exchanger and the defrosting heat exchanger; collecting fin temperature data of the defrosted heat exchanger to generate a defrosting completion judgment result. Through improvement of the defrosting method, accurate frost formation state sensing, self-adaptive adjustment of the defrosting cycle, optimization of the judgment strategy and smooth control of the switching process are realized.

The present application belongs to the technical field of wear state detection, and specifically discloses a method for detecting the wear state of a drill bit of a roof anchor rod drill of a roof bolter based on balance analysis, which comprises the following steps: collecting axial thrust force and torque to determine a stable state; continuously collecting axial thrust force, drilling speed, drilling depth and drilling deviation after the stable state is reached, comparing the collected data with a temporary reference before a reference value interval is determined and with the reference value interval after the reference value interval is determined, recording abnormal time points and drilling depth; collecting parameters in a verification time window to perform authenticity verification; matching the depth interval with a rock stratum profile after a real abnormality is confirmed, and determining wear when there is a rock stratum change and the deviation amplitude exceeds a fluctuation range; and finally calculating the axial thrust force rise rate, drilling speed drop rate and deviation growth rate, weighting the total deviation coefficient to determine the wear state and provide an early warning. The present application realizes continuous monitoring of the drilling process, eliminates rock stratum change interference and instantaneous disturbance, and reduces the false alarm rate.

The application provides a safety boundary proxy method based on vehicle-cloud cooperation and related equipment thereof, and relates to the technical field of automatic driving. By deploying a non-intrusive safety proxy module in the vehicle middleware layer, the original control instruction can be intercepted in real time and the vehicle state can be acquired synchronously without modifying the third-party algorithm code. In combination with the dynamic parameters such as the road adhesion coefficient and the scene margin issued by the cloud, a multi-dimensional dynamic safety envelope containing the space value range boundary and the time gradient boundary is constructed by using the vehicle kinematics model, so that the double precise verification of the control instruction on the numerical range and the change rate is realized. The method can not only effectively identify abnormal jump instructions exceeding the physical response limit of the actuator, but also flexibly perform hierarchical degradation processing according to the out-of-bound degree, thereby avoiding the false triggering or intervention stiffness problem caused by the traditional single threshold monitoring, and significantly improving the safety and ride comfort of the automatic driving system under complex working conditions.

The application discloses a washing machine and a control method thereof. The washing machine comprises a disc seat having a clothes feeding port; further comprising: a detergent feeding device connected with the disc seat, used for spraying detergent to the clothes feeding port; a water outlet assembly connected with the disc seat, used for spraying water to the clothes feeding port; and a detection device arranged on the side wall of the clothes feeding port, configured to generate a starting signal of the detergent feeding device or the water outlet assembly when the signal duration of the detection of the approaching of clothes to be washed exceeds a set threshold. The application generates the starting signal of the detergent feeding device or the water outlet assembly only when the detection device detects that the signal duration of the approaching of clothes to be washed exceeds a certain set threshold, thereby avoiding the false triggering of the detergent feeding device and the water outlet assembly.

This invention discloses a radar-coordinated braking control method for electric-assist bicycles in complex road conditions, relating to the field of electric-assist bicycle control technology. The method includes acquiring radar-detected rear target signals, determining the presence of collision risk based on the changing trend of the rear target signals, and identifying the movement pattern of the rear targets; acquiring the rider's pedaling torque signal; when a collision risk is determined, predicting the moment when the rider's pedaling torque will begin to decrease based on the changing trend of the rear target signals; at the predicted moment, initiating mechanical braking pre-pressure and simultaneously reducing the motor's assist output. This invention utilizes residual assist to provide soft support for the rider's body posture, compensating for the instability caused by the forward shift of the center of gravity, and solving the timing conflict problem between braking intervention and rider posture changes in existing technologies. This improves braking efficiency in dangerous rear-end scenarios while enhancing the stability and smoothness of the riding process.

The invention discloses a photovoltaic MPPT (Maximum Power Point Tracking) control algorithm, which relates to the technical field of photovoltaic control algorithms, utilizes the characteristics of simple structure, high convergence speed, high global optimization capability, wide applicability and the like of a gradient optimization algorithm, and improves the defects of premature convergence and sensitivity to control parameters of the gradient optimization algorithm. Meanwhile, the photovoltaic output energy efficiency and the stability of the photovoltaic output energy efficiency serve as the evaluation basis, an MPPT algorithm performance evaluation model is constructed through an analytic hierarchy process, photovoltaic MPPT performance is evaluated, and GTO performance is verified and improved.

The utility model relates to the sealing device field for door, especially prevent clamping prevent dragging rubber strip subassembly and door. Through the support limit top edge of inside and / or outside of sensitive element installation cavity of setting on at least one of the pair of two anti -pinch rubber strip, and the other anti -pinch cooperation in the front -back direction, in two anti -pinch rubber strip sealing cooperation state, through the support of support limit top edge, the pair of two anti -pinch rubber strip is limited in the front -back direction, can limit the distance between the sensitive element of one anti -pinch rubber strip and another anti -pinch rubber strip main part, avoid because the body vibration leads to two anti -pinch rubber strip to further close and misfire sensitive element, lead to misfire, so need not to carry out signal shielding to sensitive element, in the door closed state two anti -pinch rubber strip between clamping the situation such as belt or rope, sensitive element can also be triggered and deliver to vehicle controller signal, realize prevent dragging function.

The pipeline dredger is pre-buried in a pipeline and comprises a dredging piece and a connecting line, the dredging piece is of a sheet-shaped structure, a gap is formed in the dredging piece, and the gap extends from inside to outside along a preset path and penetrates through the peripheral face of the dredging piece so that the dredging piece can be divided into at least two structural units which are connected with each other; one end of the connecting line is fixedly connected with the free end of one of the structural units; when pulling force is applied to the connecting line, and the blocking force of the dredging piece by blockages in the pipeline reaches a set value, the structural units relatively displace under the combined action of the pulling force and the blocking force, so that the dredging piece is converted into a three-dimensional unfolding state from a flat folding state. When the connecting line is pulled, an effective contact area can be formed between the connecting line and a blockage object, extrusion and pushing effects are generated, a flat folded state can be converted into a three-dimensional unfolded state, and the problem that a traditional dredging tool is more and more tightly pushed and gets stuck is solved.

The utility model discloses a telescopic electrotome pen which comprises a pen body and a limiting piece, the pen body is provided with an inner cavity, a circuit board is installed in the inner cavity, a telescopic electrode and an LED lamp bead which are electrically connected with the circuit board are installed at the front end of the pen body, a power connection seat is arranged on the middle rear portion of the pen body, and a toggle switch electrically connected with the circuit board is installed on the front portion of the power connection seat. The toggle switch can move back and forth to control the LED lamp bead to work, and a storage battery electrically connected with the circuit board is arranged in the rear portion of the pen body. A toggle part is arranged at the front end of the limiting piece, a limiting part is arranged at the rear end of the limiting piece, buckling parts are arranged on the left side and the right side of the limiting piece respectively, clamping grooves are correspondingly formed in the two sides of the power connection base respectively, the buckling parts can be clamped in the clamping grooves, and when the buckling parts are clamped in the clamping grooves, the limiting part can prevent the toggle switch from moving forwards. According to the embodiment of the utility model, the lamp source can be effectively prevented from being accidentally turned on in the transportation process.

The invention discloses a motor locked-rotor protection driving circuit, which relates to the field of motor locked-rotor protection, and is characterized in that a first thermosensitive detection unit and a second thermosensitive detection unit are respectively connected between two output ends of a motor and a corresponding power switch unit in series; and the control module automatically pulls down the control end of the connected power switch unit to be below a cut-off threshold value during stalling, so that a corresponding current path is cut off, and automatic stalling protection is realized. Although the scheme is realized on the basis of discrete electronic elements, a current sampling resistor, a voltage comparator and a latch logic circuit which are necessary in a traditional discrete scheme are omitted through a thermal-electric direct linkage mechanism, and self-triggering protection can be completed only through few devices such as a thermistor, a bipolar transistor and a bias resistor; according to the invention, customization limitation of a special driving chip is avoided, defects of large size, high cost and low reliability of a traditional discrete circuit are overcome, a topological structure is obviously simplified, and system cost, size and failure rate are reduced.

The utility model provides an intelligent robot emergency stop circuit, including power supply, emergency stop trigger source module is used for triggering emergency stop signal, emergency stop trigger source module includes at least one emergency stop button and at least one anti -collision strip sensor interface, and emergency stop button, anti -collision strip sensor interface are connected with power supply, a plurality of signal processing modules, and each signal processing module includes first photoelectric coupler, and the input of first photoelectric coupler is connected with emergency stop button or anti -collision strip sensor interface, and the output is connected with MCU, self -locking control module respectively, self -locking control module includes self -locking circuit, and the input of self -locking circuit is connected with a plurality of signal processing modules respectively, and the output is connected with motor control module, and motor control module is used for receiving the emergency stop signal of handled and control motor stop movement, the utility model has realized the effective integration to multiple emergency stop signal source, and its self -locking function can maintain the emergency stop state automatically after triggering.

This invention relates to the field of battery separator technology, and proposes a multilayer lithium battery separator, its preparation method, and its application. The multilayer lithium battery separator, from bottom to top, includes a base film and a composite layer; the composite layer includes a polyimide porous layer and a functional layer; the functional layer includes at least one of a thiophene polymer layer and a microcapsule particle layer. This technical solution solves the problem of low coulombic efficiency in lithium battery separators in related technologies.

The invention relates to the field of application control, and discloses a method and a system for continuous control of a swan gap application, computer equipment and a storage medium, the method comprises the following steps: monitoring a current display page through source end equipment, and when the current display page is identified as a function page, recording a unique identifier which takes routing information as a core and is associated with corresponding page function data and real-time state data; when a connection request is received, the source end device sends the unique identifier and the associated data thereof to the opposite end device; the opposite terminal device analyzes the route based on the received information, executes progressive application recovery according to the route, and sequentially completes recovery of corresponding pages, functions and states; according to the method and the device, the problems of inaccurate connection control, improper page recovery opportunity and incomplete function state information in the prior art are solved, and cross-device seamless application connection experience is realized.

The invention belongs to the technical field of dysphagia rehabilitation, and particularly relates to a cold stimulation device for dysphagia rehabilitation, which comprises a support column, one end of the support column is coaxially and fixedly connected with a reciprocating electric telescopic rod, the telescopic end of the reciprocating electric telescopic rod is fixedly connected with a semiconductor touch head, the support column is fixedly connected with an occlusion seat, and the occlusion seat is fixedly connected with a rotary shaft. Occlusion air bags are symmetrically and fixedly connected to the occlusion seat, the occlusion air bags are communicated with the supporting column, and a detection tube is fixedly connected to the occlusion seat; by means of an oral cavity sealing mechanism automatically triggered by the occlusion action, the swallowing action can be accurately detected according to the oral cavity negative pressure, stimulation can be paused through the delay starting switch after the effective swallowing action is detected, the next round of training is automatically started after a rest, it is guaranteed that the time and the rhythm of each time of stimulation meet physiological response, and the training efficiency is improved. And normal expiration can be realized while an oral cavity closed space is formed, so that the breathing safety is guaranteed.