KR101728601B1

KR101728601B1 - System for monitoring active vehicle safety and havesting energy

Info

Publication number: KR101728601B1
Application number: KR1020150069537A
Authority: KR
Inventors: 김남윤; 김관하
Original assignee: 대하테크원(주)
Priority date: 2015-05-19
Filing date: 2015-05-19
Publication date: 2017-04-20
Also published as: KR20160135977A

Abstract

The present invention relates to a detection unit for detecting air pressure and multiple vibration frequencies of each tire using a pressure sensor and a multifrequency vibration sensor provided in each tire and a detection unit for detecting at least one of the detected air pressure and the multiple vibration frequency And a micro controller unit (MCU) for monitoring a state of each of the tires by comparing a threshold value corresponding to the vehicle state variable with a threshold range value corresponding to the vehicle state variable.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an active vehicle safety monitoring and energy harvesting system,

The present invention relates to an active vehicle safety monitoring and energy harvesting system, and more particularly, to an active vehicle safety monitoring and energy harvesting system for monitoring the state of a vehicle in real time using a detection value and a harvesting energy obtained through a sensor, &Lt; / RTI >

Factors that can cause a vehicle accident include, but are not limited to, vehicles that exceed vehicle load carrying criteria (e.g., vans, etc.), tire failure, tire aging (or crack), tire wear, tire deformation (e.g., Foreign matter attached to the tire, lack of tire air pressure, and combined factors.

Conventionally, the method of measuring the load of a vehicle is a method of measuring the shaft weight by guiding a moving vehicle to a metering station or a shoulder line, and using the middle shaft after stopping.

However, in the conventional method of measuring the load of the vehicle, it is necessary to arrange the specialists who install the vehicle on the vehicle guiding and the vehicle on the hourly basis, and the vehicle exceeding the vehicle load load standard must be visually identified, Technical efficiency was very low.

In the conventional method of measuring the tire condition, the air pressure of the tire is monitored in real time using the tire air pressure monitoring system. However, since only the information of the air pressure is informed to the driver, there is a limit to accurately predict tire damage.

For example, in a conventional tire air pressure monitoring system, when measuring the air pressure of a tire with a deformed tire or foreign matter, satisfactory air pressure in the normal range may be measured and it may be difficult to predict the damage of the correct tire.

Korean Patent No. 101095843 (December 13, 2011). "Fixed Axis Heavy Duty" Korean Patent No. 101408001 (June 10, 2014). "Vehicle tire air pressure monitoring apparatus and method"

The present invention relates to an active vehicle safety monitoring and energy harvesting system that actively recognizes factors that cause a vehicle accident by comparing a detected value for at least one of the air pressure and multiple vibration frequencies of each tire with a threshold range value corresponding to the vehicle state variable System.

The present invention provides an active vehicle safety monitoring and energy harvesting system that harvests multiple vibrational frequencies to electrical energy and transmits information about detected values using harvested electrical energy.

An active vehicle safety monitoring and energy harvesting system according to an embodiment of the present invention includes a detection unit that detects air pressure and multiple vibration frequencies of each tire using a pressure sensor and a multi-frequency vibration sensor provided in each tire, And a micro controller unit (MCU) for monitoring the state of each tire by comparing a detected value for at least one of the detected air pressure and the multiple vibration frequency with a threshold range value corresponding to the vehicle state variable.

The multi-frequency vibration sensor includes a fixing body; And a plurality of piezoelectric elements having a predetermined length, depth, and spacing, having different widths, and extending on at least one of the one surface and both surfaces of the fixture.

Wherein said detection unit comprises a first conversion circuit for converting at least one vibration frequency having a predetermined response characteristic at said detected multiple vibration frequencies into said detection value and for converting said detected multiple vibration frequencies to electrical energy, And a second conversion circuit that transmits information on the converted detection value to the microcontroller unit using electrical energy.

In addition, the detection unit can detect the vehicle state variable for at least one of vehicle speed, vehicle load, and vehicle compartment load using a speed sensor and a weight sensor.

In addition, the detection unit can detect temperature and sound of each tire using a temperature sensor and an acoustic sensor provided in each tire.

The microcontroller unit can check the state of each tire through the detected air pressure and the detected multiple vibration frequencies, and can precisely monitor the state of each tire through the detected temperature and the detected sound.

According to one aspect of the present invention, the detection unit generates each cumulative value for at least one of the detected air pressure, the detected multiple vibration frequencies, the detected temperature, and the detected sound, The average value, and the deviation of the sum of the sum, the mean, and the deviation.

The detection unit according to an embodiment of the present invention uses a pressure sensor and a multi-frequency vibration sensor provided in each tire to detect the air pressure and multiple vibration frequencies of the respective tires, a speed sensor, A second detection unit for detecting a vehicle state variable for at least one of a speed, a vehicle load and a load per vehicle compartment, and a second detection unit for detecting a detected value for at least one of the detected air pressure and the detected multiple vibration frequency, And a control unit for controlling the microcontroller unit comparing the threshold range values and monitoring the state of each tire to provide the detected value and the vehicle state variable.

The microcontroller unit according to an embodiment of the present invention includes a first obtaining unit that obtains a detected value of at least one of the air pressure and the multiple vibration frequencies of the respective tires detected by the pressure sensor and the multi- A second obtaining section for obtaining a vehicle state variable for at least one of a vehicle speed, a vehicle load, and a load per vehicle segment detected by a speed sensor and a weight sensor, and a second obtaining section for obtaining a threshold corresponding to the obtained detected value and the vehicle state variable And an inspection unit for comparing the range values and monitoring the condition of each of the tires.

The method for operating a vehicle safety monitoring and energy harvesting system according to an embodiment of the present invention includes detecting air pressure and multiple vibration frequencies of each tire using a pressure sensor and a multi-frequency vibration sensor provided in each tire, And monitoring the status of each tire by comparing a detected value for at least one of the detected air pressure and the detected multiple vibration frequency with a threshold range value corresponding to the vehicle condition variable.

A method of operating a detection unit according to an embodiment of the present invention includes the steps of detecting air pressure and multiple vibration frequencies of each tire using a pressure sensor and a multi-frequency vibration sensor provided in each tire, using a speed sensor and a weight sensor Detecting a vehicle condition variable for at least one of a vehicle speed, a vehicle load and a load per vehicle compartment, and determining a threshold value corresponding to the vehicle condition variable and a detected value for at least one of the detected air pressure and the detected multiple vibration frequency And controlling the microcontroller unit comparing the range values to monitor the state of each tire to provide the detected value and the vehicle state variable.

A method of operating a microcontroller unit according to an embodiment of the present invention includes obtaining a detection value of at least one of an air pressure and a multiple vibration frequency of each tire detected by a pressure sensor and a multi- Obtaining a vehicle state variable for at least one of a vehicle speed, a vehicle load, and a load per vehicle segment detected by a speed sensor and a weight sensor, and calculating a threshold range value corresponding to the obtained detected value and the vehicle state variable And monitoring the status of each of the tires in comparison.

The present invention can actively recognize a factor that causes a vehicle accident by comparing the detected value for at least one of the air pressure and the multiple vibration frequency of each tire with the threshold range value corresponding to the vehicle state variable.

The present invention can harvest multiresponse frequencies to electrical energy and transmit information about detected values using harvested electrical energy.

1 is a block diagram illustrating an active vehicle safety monitoring and energy harvesting system in accordance with an embodiment of the present invention.
2 is a block diagram showing a detection unit according to an embodiment of the present invention.
FIG. 3 is a block diagram illustrating a detection unit including multiple vibrational frequencies of FIG. 2;
4 is a view showing a multi-frequency vibration sensor according to an embodiment of the present invention.
FIG. 5 shows an example of characteristics of multiple vibration frequencies detected from the multi-frequency vibration sensor of FIG.
6 is an example showing deformation characteristics of a tire according to changes in multiple vibration frequencies and air pressure.
Fig. 7 is an example showing the tire deformation.
8A shows an example of a tire balance according to tire deformation.
FIG. 8B shows an example of a vehicle including an active vehicle safety monitoring and energy harvesting system according to an embodiment of the present invention.
Fig. 9 is a block diagram showing a detection unit including the acoustic sensor of Fig. 2; Fig.
10 is an example showing a waveform for the detected sound in Fig.
11 is a block diagram illustrating a microcontroller unit according to an embodiment of the present invention.
12 is a flowchart illustrating an operation method of an active vehicle safety monitoring and energy harvesting system according to an embodiment of the present invention.
13 is a flowchart showing an operation method of the detection unit according to the embodiment of the present invention.
14 is a flowchart illustrating an operation method of a microcontroller unit according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and accompanying drawings, but the present invention is not limited to or limited by the embodiments.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terminology used herein is a term used for appropriately expressing an embodiment of the present invention, which may vary depending on the user, the intent of the operator, or the practice of the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.

1 is a block diagram illustrating an active vehicle safety monitoring and energy harvesting system in accordance with an embodiment of the present invention.

Referring to FIG. 1, an active vehicle safety monitoring and energy harvesting system 10 includes a detection unit 100 and a micro controller unit (MCU)

The detection unit 100 detects the air pressure and multiple vibration frequencies of each tire by using a pressure sensor and a multi-frequency vibration sensor provided in each tire, and the microcontroller unit 200 detects the detected air pressure and the detected multiple vibration frequencies The state of each tire is monitored by comparing the detected value for at least one with the threshold range value corresponding to the vehicle state variable.

The pressure sensor can detect the air pressure such as the internal pressure of the tire for the running or stopped vehicle, and the air pressure can detect the tire damage (for example, tire failure, tire aging, tire wear, etc.) Can be used to monitor status.

The multi-frequency vibration sensor can detect multiple vibrational frequencies generated in the tires of a running vehicle, and the multiple vibrational frequencies can be used to detect tire damage, tire deformation (e.g., tire wheel deformation), foreign matter attached to the tire, Can be used to monitor the loading weight condition of the vehicle.

In addition, the vibrational energy that generates multiple vibrational frequencies can be used as electrical energy for communication with the microcontroller unit 200. Hereinafter, the detection unit 100 will be described in detail with reference to FIG. 2, and the microcontroller unit 200 will be described in detail with reference to FIG.

2 is a block diagram showing a detection unit according to an embodiment of the present invention.

Referring to FIG. 2, the detection unit 100 includes a first detection unit 110, a second detection unit 120, and a control unit 130.

The first detection unit 110 detects the air pressure and the multiple vibration frequency of each tire by using a pressure sensor and a multi-frequency vibration sensor provided in each tire.

Here, the first detection unit 110 may include a circuit configuration for converting to a detected value based on the detected multiple vibration frequencies and a circuit configuration for performing energy harvesting, and will be described with reference to FIG.

FIG. 3 is a block diagram illustrating a detection unit including multiple vibrational frequencies of FIG. 2;

Referring to FIG. 3, the detection unit 100 may include a multi-frequency vibration sensor 110a, a first conversion circuit 110b, a second conversion circuit 110c, and a controller 130. Here, the multi-frequency vibration sensor 110a, the first conversion circuit 110b and the second conversion circuit 110c may be included in the first detection unit 110 of FIG.

The multi-frequency vibration sensor 110a can detect multiple vibration frequencies generated in the tire of the vehicle under running, and the detected multiple vibration frequencies are detected as a tire damage, a tire deformation, a foreign substance attached to the tire, Lt; / RTI >

The multi-frequency vibration sensor 110a can detect frequencies of various bands in order to detect a tire vibration frequency which may vary depending on the traveling speed, road surface condition, and the like in a wide range.

In addition, since the range of the vibration frequency can be varied according to the tire deformation, it is possible to detect the vibration frequency in various frequency ranges through the multi-frequency vibration sensor.

Hereinafter, the structure of the multi-frequency vibration sensor 110a and the response characteristics of multiple vibration frequencies will be described with reference to Figs. 4 to 8. Fig.

4 is a view showing a multi-frequency vibration sensor according to an embodiment of the present invention.

Referring to FIG. 4, the multi-frequency vibration sensor 110a may include a fixed body and a plurality of piezoelectric elements, and a plurality of fixed bodies 112a-1, 112a-2, ..., 112a-n ).

The plurality of fixed bodies 112a-1, 112a-2, ..., and 112a-n are fixed at one end, and the plurality of piezoelectric elements have a predetermined length, depth, and spacing and have different widths. And may be arranged to extend on at least one of the both surfaces.

A plurality of piezoelectric elements can detect multiple oscillation frequencies in multiple frequency ranges and can draw energy generated by the detected multiple oscillation frequencies.

Since each of the plurality of piezoelectric elements can respond to the vibration frequency with each other, the multi-frequency vibration sensor can detect the vibration in the multiple frequency range.

The piezoelectric element 111a may include a piezoelectric body for converting a vibration frequency into energy and an upper electrode and a lower electrode for drawing the converted energy.

Further, the piezoelectric element 111a may be characterized in that the upper electrode is disposed on the upper portion of the piezoelectric body, and the lower electrode is disposed on the lower portion of the piezoelectric body.

Here, the multi-frequency vibration sensor 110a may further include a resonance circuit (not shown) connected to the plurality of piezoelectric elements and hovering the extracted energy, and the resonance circuit may include a capacitor, a resistor, an inductor, And may include at least one.

The energy harvesting through the plurality of piezoelectric elements is capable of harvesting only the energy drawn out from the piezoelectric element having the greatest amplitude among the multiple frequency vibrations or combining the energy drawn from each of the piezoelectric elements to perform harvesting.

FIG. 5 shows an example of characteristics of multiple vibration frequencies detected from the multi-frequency vibration sensor of FIG. 4, and FIG. 6 shows an example of deformation characteristics of a tire according to changes of multiple vibration frequencies and air pressure.

As shown in FIG. 5, the multi-frequency vibration sensor 110a can detect multiple vibrational frequencies having various response characteristics, so that it is possible to efficiently detect the state change of the tire.

For example, a frequency having the largest amplitude among a plurality of piezoelectric elements may be determined as a vibration frequency of the tire, or an average value of frequencies having an amplitude of a reference value or more may be determined as a vibration frequency of the tire.

Referring to FIG. 6, the variation amount of the multiple vibration frequency increases as the deformation of the tire increases, while the air pressure may be slightly increased as the deformation of the tire becomes larger. Hereinafter, the relationship between the air pressure and the multiple vibration frequency will be described in detail with reference to Figs. 7, 8A and 8B.

Fig. 7 shows an example showing a tire deformation, and Fig. 8A shows an example showing a tire balance according to a tire deformation.

Referring to Fig. 7, the tire of the vehicle may have a slight air pressure deviation before and after the wheel deformation, but vibration may occur during running, and there may be a vibration deviation before and after the wheel deformation.

Referring to FIG. 8A, the active vehicle safety monitoring and energy harvesting system 10 measures at least one of the air pressure and the vibration frequency of each tire to efficiently detect an air pressure abnormality of a vehicle that is a stop or a driving vehicle, tire damage, For example, a tire wheel deformation), foreign objects attached to the tire, and the weight of the vehicle loaded (or the balance of the tire by the weight of the load).

According to the embodiment, the active vehicle safety monitoring and energy harvesting system 10 can monitor the abnormality of the air pressure of the vehicle traveling or stopping, the tire damage and the load weight state through the detected air pressure.

In addition, the active vehicle safety monitoring and energy harvesting system 10 may be configured to determine vehicle speed, vehicle load (e.g., vehicle self-load, vehicle load and load including driver or passenger) (For example, the load per vehicle position, the load of the vehicle including the load), or the load per vehicle segment (e.g., load per each tire position, axial weight of each tire pair, load per seat of the vehicle, can do.

At this time, the active vehicle safety monitoring and energy harvesting system 10 can detect the air pressure using the electric energy generated by the multiple vibration frequencies in a situation where the vehicle is stopped.

In addition, the active vehicle safety monitoring and energy harvesting system 10 can detect vehicle loads or vehicle compartment loads included in vehicle condition variables using electrical energy generated by multiple vibrational frequencies.

In addition, the active vehicle safety monitoring and energy harvesting system 10 can perform communication between the detection unit 100 and the microcontroller unit 200 using electrical energy generated by multiple vibration frequencies, 100 may transmit to the microcontroller unit 200 at least one of the detected air pressure and vehicle condition variables.

According to another embodiment, the active vehicle safety monitoring and energy harvesting system 10 may be adapted to detect an abnormality in the air pressure of the vehicle under running, tire damage, tire deformations (e.g., die wheel deformations, etc.) It is possible to monitor the attached foreign matter and the loading weight state of the vehicle while driving.

Further, the active vehicle safety monitoring and energy harvesting system 10 can monitor the state of the vehicle with reference to the vehicle speed, vehicle load, or vehicle compartment load included in the detected multiple vibration frequency and vehicle state variables.

In addition, the active vehicle safety monitoring and energy harvesting system 10 can perform communication between the detection unit 100 and the microcontroller unit 200 using electrical energy generated by multiple vibration frequencies, 100 may transmit to the microcontroller unit 200 at least one of the detected multiple vibration frequency and vehicle state variables.

Therefore, the active vehicle safety monitoring and energy harvesting system 10 according to the embodiment of the present invention can monitor tire damage and loading weight status of a vehicle that is stopped or running through the detected air pressure, It is possible to additionally monitor tire deformation not detected by the air pressure or foreign matter adhered to the tire, and the error of the detected air pressure can be reduced.

FIG. 8B shows an example of a vehicle including an active vehicle safety monitoring and energy harvesting system according to an embodiment of the present invention.

Referring to FIG. 8B, the active vehicle safety monitoring and energy harvesting system 10 can communicate with an external device (e.g., a mobile communication terminal such as a smart phone) using electric energy generated by multiple vibration frequencies Can be performed.

According to an embodiment, the active vehicle safety monitoring and energy harvesting system 10 may further include a power storage (not shown) for storing or charging electric energy.

According to another embodiment, when the active vehicle safety monitoring and energy harvesting system 10 requests information on the status of each tire from the smartphone in a state where the vehicle is stopped, the electric energy stored or charged electric energy Can be used to transmit information about the status of each tire to the smartphone.

Wherein the state information of each tire may include a detected value including at least one of the detected air pressure and the detected multiple vibration frequencies, and comparing the detected value with a threshold value corresponding to the vehicle state variable or the vehicle state variable . &Lt; / RTI >

The critical range value may include at least one of the air pressure corresponding to the vehicle state variable, the multiple vibration frequency, the temperature, and the normal range value of the sound.

The critical range value may be a value considering at least one of the speed of the vehicle, the vehicle load, the load per vehicle segment, the road on which the vehicle is traveling, the road surface, the type of vehicle, and the type of tire.

Referring again to FIG. 3, the first conversion circuit 110b may convert at least one vibration frequency having a predetermined response characteristic at the detected multiple vibration frequencies into a detection value.

According to the embodiment, the first conversion circuit 110b may include a first ADC (Analog Digital Converter) 111b and a lower stage (not shown).

The first ADC 111b detects the impedance of at least one oscillation frequency having a predetermined response characteristic at the detected multiple oscillation frequency and the output impedance change at the lower stage to acquire a detection value (or voltage value) can do.

The second conversion circuit 110c may convert the detected multiple oscillation frequencies into electrical energy, and may transmit information on the converted detection value to the microcontroller unit using the converted electrical energy.

The second conversion circuit 110c may include a second ADC 111c, a voltage regulator 112c, a power storage 113c, and a communication unit 114c.

The second ADC 111c converts the DC voltage into the detected multiple vibration frequency DC voltage. The voltage regulator 112c rectifies the converted DC voltage to convert it into electrical energy. The storage unit 113c stores the converted electrical energy , The communication unit 114c can transmit information on the converted detection value to the microcontroller unit using the stored electrical energy.

According to the embodiment, the communication unit 114c can transmit information about the detected value to the microcontroller unit using at least one of wired communication, short-range wireless communication, and CAN communication.

The control unit 130 can control at least one vibration frequency having a predetermined response characteristic at the detected multiple vibration frequencies to be converted into the detection value and control the converted detection value to be transmitted to the microcontroller unit .

According to the embodiment, the detection unit 100 can detect the temperature and sound of the tire using the temperature sensor and the acoustic sensor provided in each tire. Hereinafter, the detection unit 100 including the acoustic sensor will be described in detail with reference to Figs. 9 and 10. Fig.

Fig. 9 is a block diagram showing a detection unit including the acoustic sensor of Fig. 2, and Fig. 10 is an example showing a waveform for the detected sound of Fig.

9, the detection unit 100 may include an acoustic sensor 110a, a conversion circuit 110b, and a control unit 130. [ Here, the acoustic sensor 110a and the conversion circuit 110b may be included in the first detection unit 110 of FIG.

The acoustic sensor 110a can detect the sound generated in the tire of the running vehicle and the converting circuit 110b can convert the detected sound into the detected value.

Referring to FIG. 10, the detected sound may include a tire sound with a foreign substance attached thereto, a tire sound according to the state of the road (e.g., a general road expressway and an unpaved road), a road surface (e.g., The tire sound according to the kind of the vehicle (for example, the internal combustion engine of the passenger car, the lorry or each vehicle), the sound according to the tire deformation and the sound according to the tire type according to various conditions, But are not limited to, waveforms.

According to the embodiment, the conversion circuit 110b may include an ADC 111b, a negative terminal 112b, and a communication unit 113b.

The ADC 111b can detect the impedance of the detected sound and the change in the output impedance of the loading terminal 112b to acquire the detection value for the sound and the communication unit 113b supplies the information about the converted detection value to the microcontroller To the unit.

Thus, the acoustic sensor 110a can detect the sound generated from the tire of the running vehicle, and the detected sound can be used to monitor the tire damage, the tire deformation, and the foreign matter attached to the tire.

According to the embodiment, the detection unit 100 can detect the temperature of the tire using a temperature sensor (not shown).

In addition, the detection unit 100 may include a conversion circuit (not shown) for converting the detected temperature into a detection value for temperature, as shown in Figs.

According to the embodiment, since the air pressure of the tire can be changed according to the temperature, the temperature sensor can detect the temperature for accurately correcting the tire air pressure of the stopped or running vehicle.

2, the first detection unit 110 detects at least one of the air pressure, the multiple vibration frequency, the temperature, and the sound of each tire by using at least one of a pressure sensor, a multi-frequency sensor, a temperature sensor and an acoustic sensor .

Further, the first detection unit 110 may generate respective accumulated values for at least one of the detected air pressure, the detected multiple vibration frequencies, the detected temperature, and the detected sound, and the sum, average And a deviation to generate a detection value.

The second detection unit 120 detects a vehicle state variable for at least one of vehicle speed, vehicle load, and vehicle segment load using a speed sensor and a weight sensor.

For example, the speed and load of the vehicle may be referred to for monitoring the condition of the tire, and the vehicle state variable including the vehicle speed and load may be compared with the detected value to determine whether the tire of the vehicle is normal or abnormal It may be a variable that is referenced.

Here, the circuit structure of the speed sensor and the weight sensor is the same as the circuit structure shown in Figs. 3 and 9 (for example, the circuit for converting at least one of the speed and the weight detected in the sensor into the vehicle state variable and the vehicle state variable A circuit for transmitting information to the microcontroller unit, etc.).

The weight sensor is used to calculate the weight of the vehicle based on the vehicle load (for example, the vehicle own load, the vehicle load including the driver or the passenger and the vehicle load including the load), and the vehicle compartment load (for example, Shaft weight, load per vehicle seat, and load per loading position of the vehicle).

The controller 130 compares the detected value of at least one of the detected air pressure and the detected multiple vibration frequencies with a threshold value corresponding to the vehicle state variable to inform the microcontroller unit that the state of each tire is monitored, Variable to be provided.

According to the embodiment, the control unit 130 can be controlled to be able to be converted into a detected value for at least one of the detected air pressure, the detected multiple vibration frequencies, the detected temperature, and the detected sound, So that it can be converted into a vehicle state variable for at least one of the loads.

11 is a block diagram illustrating a microcontroller unit according to an embodiment of the present invention.

Referring to FIG. 11, the microcontroller unit 200 includes a first acquiring unit 210, a second acquiring unit 220, and a checking unit 230.

The first obtaining unit 210 obtains a detection value for at least one of the air pressure and the multiple vibration frequencies of each tire detected by the pressure sensor and the multi-frequency vibration sensor provided in each tire.

According to the embodiment, the first acquiring unit 210 may acquire at least one of air pressure, multiple vibration frequencies, temperature, and sound.

The second obtaining unit 220 obtains a vehicle state variable for at least one of the vehicle speed, the vehicle load, and the load per vehicle detected by the speed sensor and the weight sensor.

Vehicle condition variables include vehicle speed, vehicle load (vehicle self-load, vehicle load including driver or passenger load and vehicle load including load), and vehicle compartment load (load at each tire position, Load by loading position).

The checking unit 230 monitors the state of each tire by comparing the obtained detection value with a threshold range value corresponding to the vehicle state variable.

According to the embodiment, the checking unit 230 can check the state of each tire through the detected air pressure and the detected multiple vibration frequency, and can precisely monitor the state of each tire through the detected temperature and the detected sound .

For example, the checking unit 230 compares the detected value including the detected temperature with a normal range value of temperature to generate a temperature correction value, and corrects the generated temperature correction value to a detection value including the detected air pressure So that the state of each tire can be precisely monitored.

In addition, the checking unit 230 generates a sound correction value by comparing the detected value including the detected sound with the normal range value of the sound, and corrects the generated sound correction value to a detection value including the detected multiple vibration frequencies The state of each tire can be precisely monitored.

Also, the checking unit 230 can help improve the vehicle fuel economy by precisely monitoring the condition of each tire.

According to the embodiment, the critical range value may be a value considering at least one of the speed of the vehicle, the vehicle load, the load per vehicle segment, the road on which the vehicle is traveling, the road surface, the type of vehicle, and the type of tire.

12 is a flowchart illustrating an operation method of an active vehicle safety monitoring and energy harvesting system according to an embodiment of the present invention.

Referring to FIG. 12, in step 1210, the active vehicle safety monitoring and energy harvesting system detects the air pressure and multiple vibration frequencies of each tire using a pressure sensor and a multi-frequency vibration sensor provided in each tire.

According to an embodiment, the active vehicle safety monitoring and energy harvesting system may detect at least one of air pressure, multiple vibration frequencies, temperature, and acoustics at step 1210 and may detect at least one of the detected air pressure, And at least one of the detected sounds, and may generate at least one of a sum, an average, and a deviation for each cumulative value to produce a detected value.

The active vehicle safety monitoring and energy harvesting system monitors the status of each tire by comparing the detected value for at least one of the detected air pressure and the detected multiple vibration frequencies to a threshold range value corresponding to the vehicle condition variable in step 1220 .

According to an embodiment, in step 1220, the active vehicle safety monitoring and energy harvesting system checks the condition of each tire through the detected air pressure and the detected multiple vibration frequencies, Can be precisely monitored.

13 is a flowchart showing an operation method of the detection unit according to the embodiment of the present invention.

Referring to FIG. 13, in step 1310, the detection unit detects the air pressure and the multiple vibration frequencies of each tire by using a pressure sensor and a multi-frequency vibration sensor provided in each tire.

Here, the detection unit may include, in step 1310, a circuit configuration for converting the detection frequency based on the detected multiple vibration frequencies and a circuit configuration for performing energy harvesting.

According to the embodiment, in step 1310, the detection unit may detect at least one of air pressure, multiple vibration frequencies, temperature, and sound, and may include a circuit configuration for conversion to a detected value.

In step 1320, the detection unit detects a vehicle state variable for at least one of vehicle speed, vehicle load, and vehicle compartment load using a speed sensor and a weight sensor.

Vehicle condition variables include vehicle speed, vehicle load (e.g., vehicle self-load, vehicle load including driver or passenger and vehicle load including load), or vehicle compartment load (e.g., load per tire position The shaft weight for each tire pair, the load for each seat of the vehicle, and the load for each loading position of the vehicle).

The detection unit compares the detected value of at least one of the detected air pressure and the detected multiple vibration frequencies with the threshold value range corresponding to the vehicle state variable to detect the detected value The vehicle state variable is provided.

14 is a flowchart illustrating an operation method of a microcontroller unit according to an embodiment of the present invention.

14, the microcontroller unit obtains a detection value for at least one of the air pressure and the multiple vibration frequencies of each tire detected by the pressure sensor and the multi-frequency vibration sensor provided in each tire,

According to an embodiment, the microcontroller unit may obtain at least one of air pressure, multiple oscillation frequencies, temperature and sound in step 1410.

In step 1420, the microcontroller unit obtains vehicle state variables for at least one of the vehicle speed, the vehicle load, and the vehicle compartment load detected by the speed sensor and the weight sensor.

In step 1430, the microcontroller unit monitors the status of each tire by comparing the obtained sensed value with a threshold range value corresponding to the vehicle condition variable.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

10: Active Vehicle Safety Monitoring and Energy Harvesting System
100: Detection unit
110: first detection unit
120: second detection section
130:
200: Microcontroller unit
210: first acquiring unit
220: second acquiring unit
230:

Claims

A detection unit for detecting air pressure and multiple vibration frequencies of the respective tires using a pressure sensor and a multi-frequency vibration sensor provided in each tire; And
A micro controller unit (MCU) for monitoring a state of each tire by comparing a detected value of at least one of the detected air pressure and the detected multiple vibration frequency with a threshold range value corresponding to a vehicle state variable,
/ RTI >
The multi-frequency vibration sensor
Fixture; And
A plurality of piezoelectric elements having a predetermined length, depth and spacing, having different widths, and extending on at least one of the one surface and both surfaces of the fixture,
Including active vehicle safety monitoring and energy harvesting systems.

delete

The method according to claim 1,
The detection unit
A first conversion circuit for converting at least one vibration frequency having a predetermined response characteristic at the detected multiple vibration frequencies into the detection value; And
A second conversion circuit for converting the detected multiple oscillation frequencies into electrical energy and transmitting information about the converted detection value to the microcontroller unit using the converted electrical energy,
Including active vehicle safety monitoring and energy harvesting systems.

The method according to claim 1,
The detection unit
A speed sensor and a weight sensor are used to detect the vehicle condition variable for at least one of vehicle speed, vehicle load and load per vehicle compartment
Active vehicle safety monitoring and energy harvesting systems.

The method according to claim 1,
The detection unit
The temperature and sound of each tire are detected using a temperature sensor and an acoustic sensor provided in each tire
Active vehicle safety monitoring and energy harvesting systems.

6. The method of claim 5,
The microcontroller unit
The state of each tire is checked through the detected air pressure and the detected multiple vibration frequency, and the state of each tire is closely monitored through the detected temperature and the detected sound
Active vehicle safety monitoring and energy harvesting systems.

6. The method of claim 5,
The detection unit
Generating at least one of a cumulative value for at least one of the detected air pressure, the detected multiple vibration frequencies, the detected temperature, and the detected sound, and calculating at least one of a sum, an average, and a deviation for each cumulative value And generates the detection value
Active vehicle safety monitoring and energy harvesting systems.

A first detection unit for detecting air pressure and multiple vibration frequencies of each tire using a pressure sensor and a multi-frequency vibration sensor provided in each tire;
A second detection unit for detecting a vehicle state variable for at least one of a vehicle speed, a vehicle load, and a load per vehicle segment using a speed sensor and a weight sensor; And
A microcontroller unit for comparing the detected value of at least one of the detected air pressure and the detected multiple vibration frequency with a threshold value value corresponding to the vehicle state variable to monitor the state of each tire, A control unit for controlling the state variable to be provided
Lt; / RTI >
The multi-frequency vibration sensor
Fixture; And
A plurality of piezoelectric elements having a predetermined length, depth and spacing, having different widths, and extending on at least one of the one surface and both surfaces of the fixture,
.

A first obtaining unit obtaining a detected value of at least one of an air pressure and a multiple vibration frequency of each tire detected by a pressure sensor and a multi-frequency vibration sensor provided in each tire;
A second obtaining unit for obtaining a vehicle state variable for at least one of a vehicle speed, a vehicle load, and a load per vehicle segment detected by the speed sensor and the weight sensor; And
A monitoring unit for monitoring the state of each tire by comparing the obtained detection value with a threshold range value corresponding to the vehicle state variable,
Lt; / RTI >
The multi-frequency vibration sensor
Fixture; And
A plurality of piezoelectric elements having a predetermined length, depth and spacing, having different widths, and extending on at least one of the one surface and both surfaces of the fixture,
And a microcontroller unit.

Detecting air pressure and multiple vibration frequencies of each tire using a pressure sensor and a multi-frequency vibration sensor provided in each tire; And
Monitoring the state of each tire by comparing a detected value for at least one of the detected air pressure and the detected multiple vibration frequency with a threshold range value corresponding to a vehicle state variable
Lt; / RTI >
The multi-frequency vibration sensor
Wherein a plurality of piezoelectric elements are arranged on the surface of at least one of the first surface and the second surface of the fixed body, the plurality of piezoelectric elements having a predetermined length, depth and interval, and different widths from each other. Vehicle safety monitoring and method of operation of an energy harvesting system.

Detecting air pressure and multiple vibration frequencies of each tire using a pressure sensor and a multi-frequency vibration sensor provided in each tire;
Detecting a vehicle state variable for at least one of a vehicle speed, a vehicle load, and a load per vehicle segment using a speed sensor and a weight sensor; And
A microcontroller unit for comparing the detected value of at least one of the detected air pressure and the detected multiple vibration frequency with a threshold value value corresponding to the vehicle state variable to monitor the state of each tire, Controlling which state variables are provided
Lt; / RTI >
The multi-frequency vibration sensor
A plurality of piezoelectric elements are arranged on a surface of at least one of a first surface and a second surface of the fixed body, wherein the plurality of piezoelectric elements have a predetermined length, depth and interval and have different widths. Method of operation of the unit.

Obtaining a detection value for at least one of an air pressure and a multiple vibration frequency of each tire detected by a pressure sensor and a multi-frequency vibration sensor provided in each tire;
Obtaining a vehicle state variable for at least one of a vehicle speed, a vehicle load, and a load per vehicle segment detected by a speed sensor and a weight sensor; And
Monitoring the state of each tire by comparing the obtained detected value with a threshold range value corresponding to the vehicle state variable
Lt; / RTI >
The multi-frequency vibration sensor
A plurality of piezoelectric elements are disposed on a surface of at least one of a first surface and a second surface of the fixed body, wherein the plurality of piezoelectric elements have a predetermined length, depth and spacing and have different widths. A method of operating a controller unit.

A computer-readable recording medium having recorded thereon a program for performing the method of any one of claims 10 to 12.