WO2023138194A1

WO2023138194A1 - Control system and method for reducing generation of vehicle infrasonic vibration

Info

Publication number: WO2023138194A1
Application number: PCT/CN2022/132105
Authority: WO
Inventors: 郑伟; 叶占国; 倪祯浩; 陈立定; 王小青; 吴银富; 胡晓霞; 施已平; 汪永斌
Original assignee: 浙江中车电车有限公司
Priority date: 2022-01-18
Filing date: 2022-11-16
Publication date: 2023-07-27
Also published as: CN114590213A

Abstract

The present invention relates to the technical field of vehicle control, and provides a control system for reducing generation of vehicle infrasonic vibration, comprising a sensor module configured to acquire vibration signals of a vehicle in multiple directions when the vehicle runs; a control module configured to determine that the vibration frequency of the current vehicle is within a preset range of the infrasonic frequency according to the vibration signals acquired by the sensor module and generate a corresponding control signal after a preset time period; and an execution mechanism configured to adjust a motion trajectory of a pedal according to the control signal generated by the control module.

Description

A control system and method for reducing vehicle infrasonic vibration

technical field

The invention relates to the technical field of vehicle control, in particular to a control system and method for reducing the generation of vehicle infrasonic vibration.

Background technique

Infrasound waves are sound waves with a frequency below 20 Hz. Generally speaking, the sound waves that the human ear can accept are between 20-20,000 Hz, and those with a frequency higher than 20,000 Hz are called ultrasonic waves; those with a frequency lower than 20 Hz are called infrasonic waves. Infrasound waves, like ultrasonic waves, are invisible, inaudible, and intangible, but infrasound waves have low frequencies and long wavelengths, so they travel a long distance.

When external infrasound waves are naturally formed or man-made, once its vibration frequency is the same or close to the vibration frequency of human internal organs, it will cause resonance of various organs. This resonance will cause irritability, tinnitus, headache, insomnia, nausea, blurred vision, difficulty swallowing, and liver and stomach dysfunction.

At present, the extensive use of cars has brought great convenience to people's travel, especially when taking a bus, bus or private car, which can reduce people's sense of fatigue when traveling, but the vehicle will inevitably accelerate or decelerate during driving, and according to the driver's habit of stepping on the accelerator and braking, it is easy to cause infrasound waves to resonate with human organs, causing passengers to easily feel dizzy when riding in a vehicle.

Contents of the invention

The object of the present invention is to provide a control system for reducing the generation of vehicle infrasonic vibrations to solve the problem of vehicle generation of infrasonic vibrations;

In order to achieve the above object, the technical scheme adopted in the present invention is:

A control system for reducing generation of infrasonic vibrations in a vehicle, comprising:

The sensor module is used for acquiring vibration signals of the vehicle in multiple directions when the vehicle is running.

A control module, configured to generate a corresponding control signal after judging that the vibration frequency of the current vehicle is within the preset range of the infrasonic frequency and lasts for a preset time according to the vibration signal obtained by the sensor module;

An actuator, which adjusts the trajectory of the pedals according to the control signal generated by the control module.

Further, the implementing agencies include:

The first executive mechanism includes a roller, and a support assembly for supporting the diaphragm is arranged in the roller; the support assembly includes a push plate for supporting the diaphragm and a driver for moving the push plate; the driver includes a first iron core arranged in the roller, and a first coil is wound on the surface of the first iron core, and the first coil is electrically connected to the control module.

Further, the implementing agencies include:

The second actuator includes a liquid storage frame, and nano-magnetic liquid is stored inside the liquid storage frame, and a second coil is arranged on the periphery of the nano-magnetic liquid, and the second coil is electrically connected to the control module;

Further, an alarm module is included, which is connected with the control module, and is used for sending out light flashing alarms and/or sound alarms according to the control signals.

Further, the wireless communication module is used to send the ratio data of vehicle infrasonic vibration duration and vehicle working time calculated by the control module to the server for storage.

Further, the sensor module is arranged in the space below the driver's seat.

The object of the present invention is also to provide a kind of control method that reduces vehicle infrasonic vibration to produce, comprises steps:

When the vehicle is running, the vibration signals of the vehicle in multiple directions are obtained through the sensor module;

According to the obtained vibration signal, it is judged whether the vibration frequency of the current vehicle is within the preset numerical range of the infrasonic frequency and lasts for the preset time within the preset range;

When the vibration frequency of the vehicle is within the preset value range and lasts for a preset time within the preset range, the running track of the pedal is adjusted through the control signal.

Further, the step of adjusting the pedal running trajectory through the control signal includes:

The first coil is energized through the control signal, and then the iron core generates magnetic force to move the push plate and change the track on the surface of the roller;

The control module obtains the vibration signal of the vehicle through the sensor module again, and judges whether the vibration frequency of the current vehicle is still within the preset range and lasts for the preset time within the preset range;

If so, the control signal is used to energize the second coil to generate a magnetic field, so that the liquid storage frame is deformed under pressure, thereby changing the running track of the pedal.

Compared with the prior art, the present invention at least includes the following beneficial effects:

(1) Real-time detection of the vibration situation during vehicle operation through the sensor module, and real-time adjustment of the running track of the pedal through the judgment of the control module, thereby reducing the response rate of the pedal device on acceleration or deceleration, and reducing the infrasound generated by vehicle vibration;

(2) The first actuator is set so that when the roller is rolling, the response rate of the acceleration or deceleration of the pedal structure is reduced by changing the running track of the roller, and the infrasonic wave generated by the vehicle is reduced. When the reduced infrasonic wave still continues, the viscosity of the nano-magnetic material in the second actuator is reduced, thereby further reducing the response rate of the pedal device on acceleration or deceleration, thereby eliminating the infrasonic wave generated by the vehicle, which can avoid resonance between vehicles and people, and reduce the probability of motion sickness when passengers ride;

(3) Provide the generation of infrasonic waves for the driver through light and sound alarms, so that the driver can change the force of stepping on the pedals, and realize the dual control of people and vehicles to reduce the generation of infrasonic waves;

(4) Upload the data information generated by infrasonic waves to the server through the wireless communication module, and then conduct in-depth research on the data in the server, and continuously optimize the vehicle structure to avoid the generation of infrasound waves.

Description of drawings

FIG. 1 is a schematic diagram of a framework of Embodiment 1 of the present invention;

Fig. 2 is a schematic diagram of the pedal structure in Embodiment 1 of the present invention;

3 is a schematic diagram of the internal structure of the roller in Embodiment 1 of the present invention;

FIG. 4 is a flow chart of Embodiment 2 of the present invention.

In the figure, base 100, rotating plate 110, liquid storage frame 120, supporting plate 130, rotating foot 210, roller 220, push plate 221, diaphragm 222, accommodating chamber 223, first iron core 224, first coil 225, movable rod 226, movable hole 227, spring 230, pedal 300, third coil 310, second iron core 320.

Detailed ways

It should be noted that all directional indications (such as up, down, left, right, front, rear...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions among the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

In addition, descriptions such as "first", "second", "a" and so on in the present invention are used for description purposes only, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary; Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In addition, the technical solutions of the various embodiments of the present invention can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist, nor is it within the scope of protection required by the present invention.

The following are specific embodiments of the present invention, and further describe the technical solution of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

Embodiment one

As shown in FIG. 1 , the present invention is a control system for reducing vehicle infrasonic vibration, which includes a sensor module, a control module, an actuator, an alarm module and a wireless communication module.

The sensor module is used to acquire vibration signals of the vehicle in multiple directions when the vehicle is running. The control module is used to determine that the vibration frequency of the current vehicle is within the preset range of the infrasonic frequency according to the vibration signal obtained by the sensor module and after staying within the preset range for a preset time, generate a corresponding control signal. The actuator is used to adjust the running track of the pedal according to the control signal generated by the control module. The alarm module is connected with the control module, and it is used for sending out light flashing alarm and/or sound alarm according to the control signal. The wireless communication module is used to send the ratio data of vehicle infrasonic vibration duration and vehicle working time calculated by the control module to the server for storage.

The present invention detects the vibration situation during the running of the vehicle in real time through the sensor, and adjusts the running track of the pedal in real time through the judgment of the control module, thereby reducing the response rate of the pedal device in acceleration or deceleration, and reducing or even avoiding the infrasonic wave generated by the vehicle vibration. And the generation of infrasonic waves is provided to the driver through light and sound alarms, so that the driver can change the force of stepping on the pedals, and realize the dual control of people and vehicles to reduce or even avoid the generation of infrasonic vibrations;

In addition, the present invention also uploads the data information generated by the infrasonic vibration to the server through the wireless communication module, and then conducts in-depth research on the data in the server, and can continuously optimize the vehicle structure to avoid the generation of infrasonic vibration.

Further, as shown in FIGS. 2 and 3 , the entire pedal structure includes a base 100 , a rotating plate 110 , a first actuator, a pedal 300 and a second actuator, and the first actuator includes a roller 220 and a rotating foot 210 . One end of the pedal 300 is hinged to the base 100 , a pair of rotating legs 210 are elastically connected to the side of the pedal 300 close to the base 100 , a roller 220 is movably installed between the two rotating legs 210 , and the rotating plate 110 is hinged to the base 100 .

The roller 220 is provided with a support assembly for supporting the diaphragm 222, the base 100 is provided with a rotating plate 110, the side of the roller 220 is in contact with the rotating plate 110, and the roller 220 is provided with a housing cavity 223, when the vehicle is to be accelerated or decelerated, people need to step on the corresponding pedal 300, and the two rotating feet 210 rotate relative to the pedal 300. There is a certain friction between the 10, so that the surface of the rotating plate 110 that the roller 220 is attached to rotates. When the vehicle is accelerating or decelerating, the vehicle will generate infrasonic waves. During this process, the control module will always receive the vehicle vibration signal obtained by the sensor module and judge that when the frequency of the vehicle vibration is within a preset range and lasts for a certain period of time, the control module will generate a control signal and transmit the signal to the support assembly. The support assembly will move inward, so that the diaphragm 222 is also inward. The contact part of 110 is the diaphragm 222, so that the acceleration or deceleration response rate of the pedal structure can be reduced, thereby reducing or even avoiding the infrasonic vibration generated by the vehicle, thereby avoiding resonance between the vehicle and people, reducing the probability of motion sickness when passengers are riding, and improving the comfort of passengers.

When the driver wants to accelerate or decelerate suddenly, people will step on the accelerator or brake pedal 300 hard, and the roller 220 will quickly pass over the receiving chamber 223 at this time, so that the contact part between the roller 220 and the rotating plate 110 is the outer surface of the roller 220, and the acceleration or deceleration response rate of the pedal structure will be normal again, thereby realizing the rapid acceleration or rapid deceleration of the vehicle.

A spring 230 is provided between the rotating foot 210 and the pedal 300 , and when people remove the force acting on the pedal 300 , the spring 230 will drive the rotating foot 210 to reset.

The diaphragm 222 seals the chamber 223, and the support assembly is located in the chamber 223. The support assembly includes a push plate 221 for supporting the diaphragm 222 and a drive for pushing the push plate 221 to move. The diaphragm 222 is connected to the push plate 221. When people step on the pedal 300 normally, that is, when the infrasonic wave generated by the vehicle is not in the preset range, the drive pushes the push plate 221 out, because the push plate 221 is far away from the side of the drive and the diaphragm 22. 2 contact, so that the push plate 221 props up the diaphragm 222, that is, the shape of the diaphragm 222 is the same as that of the original surface of the roller 220, so that the vehicle can run normally.

The driver includes an iron core 224, a first coil 225 is wound on the surface of the first iron core 224, a magnetic movable rod 226 is arranged on the side of the push plate 221 facing the first iron core 224, the movable rod 226 is movably inserted in the first iron core 224, and the first coil 225 is electrically connected to the control module. The first iron core 224 is provided with a movable hole 227 for movable insertion of the movable rod 221. When the infrasonic wave detected by the sensor module is within the preset range, the control module will generate a control signal and pass the signal to the first coil 225 to energize, so that a magnetic field is generated around the first iron core 224. Because the movable rod 226 has a certain magnetic force, the magnetic field will produce a pulling force on the movable rod 226, thereby pulling the movable rod 226 back into the movable hole 227. Because the push plate 221 and the movable rod 22 6 connection, so that the push plate 226 moves to the inside of the accommodation cavity 223 with the movable rod 226, and the diaphragm 222 is connected with the push plate 221, so that the diaphragm 222 also retracts into the accommodation cavity 223 along with the push plate 221, so that a gap is formed at the contact position between the roller 220 and the rotating plate 110, which can reduce the acceleration or deceleration response rate of the pedal structure, thereby reducing the infrasonic vibration generated by the vehicle, and improving the passenger comfort.

When the infrasonic vibration is eliminated and the vehicle is running at a steady speed or at a stop, the control module controls the first coil 225 to be energized in reverse, so that the new magnetic field generated on the first iron core 224 will generate a magnetic force that pushes outward to the movable rod 226, so that the movable rod 226 can be pushed out again, so that the shape of the diaphragm 223 is the same as that of the original surface of the roller 220, and the reset of the support assembly is completed.

The present invention sets the first actuator so that when the roller is rolling, the acceleration or deceleration response rate of the pedal structure is reduced by changing the track of the roller when the roller is rolling, the infrasonic vibration generated by the vehicle is reduced, and the comfort of passengers is improved.

A second actuator is arranged between the base 100 and the rotating plate 110, and a liquid storage frame 120 is arranged in the second actuator, and nano-magnetic liquid is stored in the liquid storage frame 120, and a second coil (not shown in the figure) is arranged on the periphery of the nano-magnetic liquid, and the second coil is electrically connected to the control module.

The liquid storage frame 120 is made of rubber material, and the rubber has a certain elasticity, so that the liquid storage frame 120 has the ability to recover quickly when it is deformed by an external force.

When the vehicle is accelerating or decelerating, after the first actuator adjusts the pedal track, and the vehicle vibration signal acquired by the sensor module is still within the preset range, the control module will send a control signal to the second coil, and the second coil is energized to generate a magnetic field. The nano-magnetic liquid is located inside the liquid storage frame and the second coil is surrounded by the inside of the liquid storage frame, so that the nano-magnetic liquid is affected by the magnetic field, and its viscosity gradually decreases until the viscosity reaches the preset range. One end of 110 is located above the liquid storage frame 120 and is in contact with the top of the liquid storage frame 120, and the pedal 300 is movably installed on the rotating plate 110 through the roller 220, so that the liquid storage frame deforms, and the rotating plate 110 rotates, which can further reduce the response rate of the pedal device on acceleration or deceleration, thereby reducing the infrasonic vibration generated by the vehicle.

In addition, a second iron core 320 connected to the vehicle is provided directly above the liquid storage frame 120 , and a third coil 310 is wound on the surface of the iron core 320 . After a certain period of time, the control system of the pedal structure controls the third coil 310 to be energized, so that the second iron core 320 generates suction to the end of the rotating plate 110 close to the liquid storage frame, so that the rotating plate rotates in the opposite direction. Suction is generated to restore the pre-adjustment state.

The present invention further reduces the response rate of the pedal device in acceleration or deceleration by reducing the viscosity of the nano-magnetic material in the second actuator, thereby eliminating the infrasonic vibration generated by the vehicle, thereby avoiding resonance between the vehicle and people, and reducing the probability of motion sickness when passengers ride.

Embodiment two

As shown in Figure 4, a kind of control method that reduces vehicle infrasonic vibration generation of the present invention comprises steps:

S1. When the vehicle is running, the vibration signals of the vehicle in multiple directions are obtained through the sensor module;

S2. According to the obtained vibration signal, it is judged whether the vibration frequency of the current vehicle is within the preset value range of the infrasonic frequency and lasts for a preset time;

S3. When the vibration frequency of the vehicle is within a preset value range and lasts for a preset time, adjust the running trajectory of the pedals through the control signal.

Specifically, the step of adjusting the pedal running trajectory through the control signal in step S3 includes:

S31. Energize the first coil through the control signal, and then the iron core generates magnetic force to move the push plate to change the track on the surface of the roller;

S32. The control module obtains the vibration signal of the vehicle through the sensor module again, and judges whether the vibration frequency of the current vehicle is still within the preset range and lasts for the preset time;

S33. If yes, energize the second coil to generate a magnetic field through the control signal, so that the liquid storage frame is deformed under pressure, thereby changing the running track of the pedal.

The present invention detects the vibration condition during vehicle operation in real time through the sensor module, and adjusts the running track of the pedal in real time through the judgment of the control module, thereby reducing the response rate of the pedal device on acceleration or deceleration, and reducing the infrasonic vibration generated by vehicle vibration.

And when adjusting the running track of the pedal, firstly, through the set first actuator, when the roller is rolling, by changing the running track of the rolling wheel, the acceleration or deceleration response rate of the pedal structure is reduced, and the infrasonic vibration generated by the vehicle is reduced, and then the frequency of the infrasonic wave is re-judged. Resonance reduces the probability of motion sickness for passengers when riding in a car.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains may make various modifications or supplements to the described specific embodiments, or replace them in similar ways, but they will not deviate from the spirit of the present invention or go beyond the scope defined in the appended claims.

Claims

A control system for reducing vehicle infrasonic vibration, characterized in that it includes:

The sensor module is used for acquiring vibration signals of the vehicle in multiple directions when the vehicle is running.

A control module, configured to generate a corresponding control signal after judging that the vibration frequency of the current vehicle is within the preset range of the infrasonic frequency according to the vibration signal obtained by the sensor module and within the preset range for a preset time;

An actuator, which adjusts the trajectory of the pedals according to the control signal generated by the control module.
The control system for reducing vehicle infrasonic vibration according to claim 1, wherein the actuator includes:

The first executive mechanism includes a roller, and a support assembly for supporting the diaphragm is arranged in the roller; the support assembly includes a push plate for supporting the diaphragm and a driver for moving the push plate; the driver includes a first iron core arranged in the roller, and a first coil is wound on the surface of the first iron core, and the first coil is electrically connected to the control module.
The control system for reducing the generation of vehicle infrasonic vibration according to claim 2, wherein the actuator comprises:

The second actuator includes a liquid storage frame, and nano-magnetic liquid is stored inside the liquid storage frame, and a second coil is arranged on the periphery of the nano-magnetic liquid, and the second coil is electrically connected to the control module;
A control system for reducing vehicle infrasonic vibrations according to claim 1, characterized in that it comprises an alarm module connected to the control module and configured to issue light flashing alarms and/or sound alarms according to the control signals.
A control system for reducing vehicle infrasonic vibration according to claim 1, characterized in that the wireless communication module is used to send the ratio data of vehicle infrasonic vibration duration and vehicle working time counted by the control module to the server for storage.
The control system for reducing vehicle infrasonic vibration according to claim 1, wherein the sensor module is arranged in the space below the driver's seat.
A control method for reducing the generation of vehicle infrasonic vibration, based on the control system for reducing the generation of vehicle infrasonic vibration according to claim 1, characterized in that it comprises the steps of:

When the vehicle is running, the vibration signals of the vehicle in multiple directions are obtained through the sensor module;

According to the obtained vibration signal, it is judged whether the vibration frequency of the current vehicle is within the preset numerical range of the infrasonic frequency and lasts for a preset time within the preset range;

When the vibration frequency of the vehicle is within the preset value range and lasts for a preset time, the running track of the pedal is adjusted through the control signal.
The control method for reducing the generation of vehicle infrasonic vibration according to claim 7, wherein the step of adjusting the pedal running trajectory through the control signal comprises:

The first coil is energized through the control signal, and then the iron core generates magnetic force to move the push plate and change the track on the surface of the roller;

The control module obtains the vibration signal of the vehicle through the sensor module again, and judges whether the vibration frequency of the current vehicle is still within the preset range and lasts for the preset time within the preset range;

If so, the control signal is used to energize the second coil to generate a magnetic field, so that the liquid storage frame is deformed under pressure, thereby changing the running track of the pedal.