KR20030032226A - Brake Pad Wear Detecting Device and Method thereof - Google Patents

Abstract

The present invention installs the capsule-type wireless recognition device on the brake pad and records the brake pad replacement date, the mileage when replacing the brake pad in the memory in the capsule-type wireless recognition device to brake the wear state of the brake pad at the time of wearing the maintenance shop. A wear check apparatus and a method for checking the wear of a brake pad without disassembling it, the method comprising: a wireless recognition device (10) for storing data about the thickness of the brake pad and converting the data into electromagnetic data and outputting the data; Wireless reading means (20) for reading electromagnetic wave data output from the wireless recognition device; Memory means (70) for storing a variety of data and a program for controlling the transmission and reception of data between the radio recognition device and the radio reading means; Key input means (30) for inputting data with a plurality of key input buttons; Display means (40) for displaying display data; Clock means 50 for providing actual time data; Consists of the control means 60 for controlling each means, it is possible to know the exact replacement time of the brake pads without disassembling the brake device and to easily check the remaining thickness of the brake pads, replacement date, mileage during replacement, etc. Effective management of brake pads and accidents due to brake failure can be prevented.

Description

Brake Pad Wear Detecting Device and Method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wear check device for a brake pad and a method for checking the same, and in particular, a capsule type wireless recognition device is installed in a brake pad, and the brake pad replacement date and the mileage when replacing the brake pad are stored in a memory in the capsule type wireless recognition device. The present invention relates to a brake pad wear checking device and a method of checking the brake pad to be able to grasp the wear state of the brake pad without disassembling the brake device when the workshop is received.

In general, a brake is a device for decelerating or stopping a driving vehicle, and maintaining a stopped vehicle in a stationary state, and converting kinetic energy of a vehicle into thermal energy using friction force generated by a driver's operation force or an auxiliary power. In other words, it functions as a braking action.

This brake system is actually using the force generated from the braking force generating system and the braking force generating device to generate the force required for braking using the driver's operating force or auxiliary power (Vacuum, Hydraulic, Air). It is an auxiliary system for obtaining auxiliary power of pipes, pistons, valves, and power generators that transfer the power of the braking system to the braking system. It is composed.

Among them, a brake device includes a drum brake and a disc brake, and the disk brake fixes the brake disc 2 to the wheel axle 1 of the vehicle as shown in FIGS. 1A and 1B. In addition, a pair of brake pads 3a and 3b are provided inside the wheels so as to be in close contact with or spaced from both the left and right surfaces of the brake disc 2.

As shown in FIG. 1A, the pair of braking pads 3a and 3b thus installed are placed in a driving state by rotating the wheels when spaced apart from the surface of the brake disc 2, and as shown in FIG. 1B. When the pads 3a and 3b are pressed against the surfaces of the left and right sides of the brake disc 2, frictional force is applied by the pressing force to decelerate or stop the rotating brake disc 2 and brake it.

As described above, the brake pad constituting a part of the brake braking device gradually decreases as the thickness of the brake pad is used, and eventually, when worn out, the braking force is completely lost, which causes a large accident. Since the braking pad is installed inward, it is difficult for the driver to visually check the current wear state of the braking pad in use, that is, its thickness.

Therefore, in order to check this, in the past, as shown in FIG. 2A, the wear indicator pins 4 are vertically embedded in the brake pads 3a and 3b, and the brake pads 3a and 3b have a predetermined thickness or more. When worn, as shown in FIG. 2B, the wear indicator pin 4 comes into contact with the surface of the disk 2 to generate friction noise while foretelling a replacement time of the brake pads 3a and 3b.

However, when the vehicle is driving, the external noise is so great that it is very difficult for the driver who is driving to hear this friction, and if it is not taken promptly, it will damage the brake disc and reduce the braking function. What happens is that

In addition, if the wear indicator breaks during use of the brake pad due to corrosion or the like, a friction sound between the wear indicator and the disc does not occur, and thus a notice function is lost. Therefore, there is a risk of causing a large accident by missing a replacement time of the brake pad.

Moreover, in the structure of the braking pads, most of them are sold without a wear indicator which serves as a notice function for the replacement of the braking pads, and it is currently in a real danger state.

An example of a method for resolving these hazards and inconveniences is disclosed in US Pat. No. 6,257,374 (name of the invention: brake pad wear detection system and method), which prior art discloses a brake shoe as shown in FIG. Permanent magnets 6a and 6b are mounted on 5a and 5b and sensors 8a and 8b (e.g. Hall element switches) are mounted on caliper 7 so that the pads 9a and 9b are worn out. As the distance between the magnets 6a and 6b and the sensors 8a and 8b is closer, the intensity of the sensed signal is increased to detect the wear state of the pads 9a and 9b.

However, this prior art also generates the abrasion mark of the brake pad as an audible and visible signal by generating an electric signal instead of the friction sound, but cannot display the residual thickness, replacement date, and mileage after replacement of the brake pad. The problem is that the braking pad cannot be managed correctly.

Accordingly, the present invention was devised to solve such a conventional problem, and an object of the present invention is to provide a brake pad wear check apparatus and a method for checking the brake pad wear state without disassembling the brake device. have.

Another object of the present invention is to provide a wear check device for a brake pad and an inspection method thereof for detecting a wear state of the pad in an electronic manner using a radio frequency identifier device.

It is still another object of the present invention to provide a brake pad wear checking apparatus and a method of checking the brake pad capable of displaying a residual thickness of the brake pad, a replacement date, a mileage after replacement, and the like.

1A and 1B are schematic operation diagrams showing an operating state of an automobile brake pad;

2A and 2B are structural views of a device for checking the thickness of a conventional brake pad;

3 is a schematic structural diagram of a conventional brake pad wear detection system;

Figure 4 is a block diagram showing the configuration of the wear check device of the brake pad according to an embodiment of the present invention;

5 is a circuit diagram showing the configuration of a radio recognition device and radio reading means;

6a and 6b are views showing a state in which the radio recognition device is installed on the brake pad and a state worn out by the brake operation after installation;

7 is a circuit diagram of a wireless recognition device capable of measuring a residual thickness of a brake pad by connecting a ladder resistor;

8A and 8B are views showing a state where a wireless recognition device having a ladder resistor is installed on a brake pad;

9 is a configuration diagram showing an arrangement of key input means and display means;

10 is a flowchart showing a main program of the control method of the wear check apparatus for a brake pad according to the present invention;

11 is a flowchart of a subroutine showing a method of performing a new replacement processing function of a brake pad according to the present invention;

12 is a flowchart illustrating a method of performing a pad check function according to the present invention;

Fig. 13 is a flowchart showing a method of performing a setting processing function according to the present invention.

<Description of Symbols for Major Parts of Drawings>

10: wireless recognition device 20: wireless reading means 30: key input means

40: display means 50: clock means 60: control means

70: memory means 80: alarm means

In order to achieve the above object, the wear check apparatus for a brake pad according to the present invention includes: a wireless recognition device for storing data on a brake pad and converting the data into electromagnetic data; Wireless reading means for reading electromagnetic wave data output from the wireless recognition device; Memory means for storing a data and a program for controlling the transmission and reception of data between the wireless recognition device and the wireless reading means; Key input means for inputting data with a plurality of key input buttons; Display means for displaying display data; Clock means for providing actual time data; Control means for controlling the respective means.

The wireless recognition device according to the present invention is provided with a capsule type in a brake pad, which is worn together with its wear, thereby increasing the resistance value; A data integrated circuit unit which stores data on the brake pad and converts the data and the resistance of the ladder resistor into electromagnetic data and outputs the electromagnetic data; An antenna unit radiating electromagnetic wave data output from the data integrated circuit unit as electromagnetic waves; A rectifier for rectifying the high frequency voltage input from the antenna unit; And a smoothing unit supplying power to the data integrated circuit unit by smoothing the pulsed voltage output from the rectifying unit to a DC voltage.

In addition, the wireless recognition device according to the present invention is provided between the pad support and the brake pad in the form of a capsule, the pad support and the brake pad is characterized in that it is integrally bonded and disassembled during manufacturing at the factory.

The wireless reading means according to the present invention includes a carrier generator for generating a carrier; A high frequency amplifier which modulates and amplifies the carrier wave generated by the carrier generator into data inputted from a control means; Characterized in that it comprises an antenna for emitting a high frequency signal output from the high frequency amplification unit to the air.

Key input means according to the present invention comprises a moving key for moving the cursor displayed on the display means; A transmission and reception confirmation key for selecting an operation for transmitting and receiving wireless data between the radio recognition device and the radio reading means; A power key for applying power; Numeric / English keys for entering numbers from 0 to 9; It is characterized by consisting of a special key for selecting a special function.

The wear check method of the brake pad according to the present invention includes the steps of performing an initialization process after applying power; Modifying the time of the clock means to the current time and storing the recognition information in the memory means; Displaying the function selection screen on which the keys for selecting functions of "new replacement", "pad check", and "setting" are displayed on the display means after storing the recognition information; When the user selects a key of "new replacement", "pad check", or "setting", the main program is composed of subroutine steps that perform the function of the key.

The new exchange function subroutine transmits a carrier wave to a radio recognition device through a radio reading means, receives a carrier wave from the radio recognition device, and reads the manufacturer name, date of manufacture, serial number and password code stored in the memory. ; Receiving data transmitted from the wireless recognition device through the wireless reading means to determine whether the article is genuine; If not genuine, displaying a message indicating " non-genuine " on the display means, and returning to the function selection screen of the main program; In the case of a genuine product, reading the current year, month, day, hour, minute from a clock means and recording an exchange date in a wireless recognition device; After recording the replacement date as described above, displaying on the display means a screen for inputting a workshop name, maintenance name and mileage; And displaying the repair shop name, maintenance name and mileage inputted by the key input means on the display means, and transmitting the data to the wireless recognition device through the wireless reading means for recording.

The pad check function subroutine includes the steps of: transmitting a carrier wave to a wireless recognition device through a wireless reading means; Receiving the data transmitted from the wireless recognition device and displaying the data on the display means; Calculating and displaying a remaining thickness of the pad from the received data; And displaying on the display means a message for replacing the brake pad when the remaining thickness is less than or equal to the threshold thickness.

The setting processing function subroutine includes displaying a " time change " and " erase internal memory " menu on the display means; If the "time change" menu is selected, reading the time from the clock means and displaying the time on the display means, and displaying a message for selecting the time change; If the time change is not selected, returning to the main program, and if the time change is selected, changing the year, month, day, hour, and minute displayed on the display means; And setting the clock means to operate at the changed time.

DESCRIPTION OF EMBODIMENTS The technical configuration of a wear check apparatus for a brake pad according to the present invention will be described with reference to the accompanying drawings.

4 is a block diagram showing the configuration of a wear check apparatus for a brake pad according to an embodiment of the present invention.

The wear checking apparatus of a brake pad according to an embodiment of the present invention stores the data on the brake pad, converts the data into electromagnetic data, and outputs the radio recognition device 10 installed between the brake pad and the pad support. )Wow; Wireless reading means (20) for reading electromagnetic wave data output from the wireless recognition device (10); Memory means (70) for storing a variety of data and a program for controlling the transmission and reception of data between the wireless recognition device (10) and the wireless reading means (20); Key input means (30) for inputting data with a plurality of key input buttons; Display means (40) for displaying display data; Clock means 50 for providing actual time data; Alarm means (80) for sounding an alarm; It consists of a control means 60 for controlling the respective means.

5 is a circuit diagram showing the configuration of the radio recognition apparatus and radio reading means.

The wireless recognition device 10 includes a ladder resistor 15 whose resistance value decreases or increases with wear of a brake pad; A data integrated circuit unit (11) for storing data on the brake pads and converting the data and the resistance values of the ladder resistors (15) into electromagnetic data; An antenna unit 12 which radiates electromagnetic wave data output from the data integrated circuit unit 11 as electromagnetic waves; A rectifier 13 for rectifying the high frequency voltage input from the antenna unit 12; It is composed of a smoothing unit 14 for smoothing the pulse current voltage output from the rectifying unit 13 to a DC voltage to supply the power to the data integrated circuit unit 11.

The wireless recognition device 10 is installed between the brake pad and the pad support to record, update, and read data on the state of the brake pad, and is mounted in a small capsule.

The radio reading means 20 includes a carrier generator 21 for generating a carrier; A high frequency amplifier 22 for modulating (for example, amplitude modulation) and amplifying the carrier wave generated by the carrier generator 21 with data input from the control means 60; It consists of an antenna 23 for radiating the high frequency signal output from the high frequency amplifier 22 into the air.

6A and 6B show a state in which the wireless recognition device is installed on the brake pad and a state worn by the brake operation after installation.

The wireless recognition device 10 is provided between the pad support 16 and the brake pad 17 in a capsule form, so that the pad support 16 and the brake pad 17 are integrally bonded and disassembled during manufacturing at the factory. In the case where the brake pad is newly mounted, as shown in FIG. 6A, the thickness thereof is relatively large as t ₁ , thereby exhibiting a braking function.

When the brake operates in a state where the wireless recognition device 10 is installed between the pad support 16 and the brake pad 17, the brake pad 17 is pressed against the brake disc 18 to generate frictional force. After a long period of wear, as shown in Fig. 6b, the wireless recognition device 10 wears to the surface of the brake disc 18, so that the thickness thereof is reduced to t ₂ .

In this state, when the wearer wears a little more, the wireless recognition device 10 wears and is destroyed. Thus, a signal indicating data on the brake pad 17 is not emitted from the wireless recognition device 10. The exchange point of 17) can be known.

As another embodiment, FIG. 7 shows a circuit diagram of a wireless recognition device capable of measuring a residual thickness of a brake pad by connecting a ladder resistor.

Constitute a plurality of resistors R _1, R _2, ..., a ladder resistor 15 is connected to R _n with the parallel connected resistors in the integrated circuit 11, as shown. As the brake pads wear, the number of parallel connection resistors constituting the ladder resistor 15 decreases, thereby increasing the resistance value. The remaining thickness of the brake pad 17 can be measured by sensing the increasing resistance value.

Here, when R ₁ = R ₂ = ·· = R _n = r, the resistance value of the ladder resistor 15 composed of n is r / n. Therefore, this resistance value is measured and compared with the resistance value of one parallel resistor. The remaining thickness of the brake pad 17 can be easily measured.

8A and 8B show a state in which a wireless recognition device having a ladder resistor is mounted on a brake pad.

As shown in the drawing, a ladder resistor 15 is attached to one end of the wireless recognition device 10 and inserted into a hole 19 formed between the brake pad 17 and the pad support 16 by a screw or welding method. Mount it. At this time, the ladder resistor 15 is mounted toward the brake disc 18 so as to be worn by the contact with the brake disc 18.

Therefore, as illustrated in FIG. 8B, when the brake disc 18 and the ladder resistor 15 come into contact with each other and are worn, the resistance value of the ladder resistor 15 measured by the integrated circuit unit 11 is changed.

The variable resistance value is input to the control means 60 through the wireless reading means 20, and the control means 60 calculates the remaining thickness of the brake pad according to the resistance value and displays it on the display means 40. .

9 is a block diagram showing an arrangement of key input means and display means.

The key input means 30 includes a movement key 31 for moving the cursor displayed on the display means 40; A transmission and reception confirmation key 32 for selecting an operation for transmitting and receiving wireless data between the radio recognition device 10 and the radio reading means 20; A power key 33 for applying power; A number / english key 34 for inputting a number or alphabetic character from 0 to 9; It consists of a special key 35 for selecting a special function.

The key input means 30 and the display means 40 configured as described above are arranged on the front of the inspection apparatus so that the key input means 30 and the display means 40 can be easily read and input when used in a factory.

In addition, the key input means 30 and the display means 40 may be provided on the front panel of the driver's seat so that the driver can easily check and manipulate the driver at any time. Since the brake pad 17 has a long replacement cycle, the general driver may forget or be indifferent to the replacement timing.

However, when the key input means 30 and the display means 40 of the brake pad checking apparatus according to the present invention are installed in the driver's seat, the remaining thickness, the traveling distance, the replacement date, etc. of the brake pad can be grasped by a simple operation. When it is necessary to drive, it is possible to grasp the state of the brake pads without disassembling the brake system.

Therefore, the general driver who is indifferent to the wear state of the brake pad can easily grasp the wear state and replace the brake pad before long-distance travel or determine the replacement time in advance to prevent the risk of an accident due to the inoperability of the brake.

On the other hand, the memory means 70 is a ROM (ROM) for storing software, such as software for controlling the operation of transmitting and receiving wireless data between the wireless recognition device 10 and the wireless reading means 20, and for storing temporary data It consists of RAM and flash memory.

The alarm means 80 sounds an alarm by the control means 60. When the ladder resistor 15 of the wireless recognition device 10 wears down little by little by the operation of the brake, and the ladder resistor 15 elapses for a long time, It will wear out.

Since the wireless recognition device 10 is worn and destroyed while directly contacting the brake disc 18, a signal representing data on the brake pad 17 is not emitted from the wireless recognition device 10, and the wireless recognition device ( The capsule surrounding the outside of 10) rubs against the brake disc, causing noise. At this time, the control means 60 operates the alarm means 80 to inform the time of replacement of the brake pad 17.

The operation of the wear check device of the brake pad configured as described above will be described with a flowchart showing a software program executed by the control means 60.

10 is a flowchart showing a main program of the control method of the wear check apparatus for a brake pad according to the present invention.

After the power is applied, an initialization process is performed (step S81), the time of the clock means 50 is corrected to the current time, and the recognition information is stored in the memory means 70 (step S82). After the recognition information is stored, the display means 40 displays a screen on which the keys for selecting functions of "new replacement", "pad check", and "setting" are displayed (step S83).

If the user selects one of " new replacement ", " pad check " and " setting ", a subroutine for performing the function of the key is executed (step S84).

11 is a flowchart of a subroutine showing a method of performing a new replacement processing function of a brake pad according to the present invention.

When a new exchange function is selected on the function selection display screen of the main program, the control means 60 transmits a carrier wave to the radio recognition device 10 through the radio reading means 20, and transmits the carrier wave from the radio recognition device 10. It receives and reads the manufacturer's name, manufacturing date, manufacturing serial number and password code stored in the memory (step S91).

The control means 60 receives the data transmitted from the radio recognition apparatus 10 through the radio reading means 20 and determines whether it is genuine (step S92).

If it is not genuine, a message indicating " non-genuine is displayed " is displayed on the display means 40, and the display returns to the function selection display screen of the main program (step S93). 50, the current year, month, day, hour and minute are read out and the exchange date is recorded in the wireless recognition device 10 (step S94).

After recording the replacement date as described above, the display unit 40 displays a screen on which the workshop name, maintenance name and mileage can be input (step S95), and the operator presses the key of the key input means 30. Press to display data for inputting the workshop name, maintenance name and mileage on the display means 40 (step S96), and when the confirmation key 32 is pressed (step S97), the control means 60 reads the data wirelessly. It transmits to the radio recognition device 10 via the means 20 for recording (step S98).

After performing the new replacement processing subroutine of the brake pad described above, the control means 60 returns to the main program.

12 is a flowchart illustrating a method of performing a pad check function according to the present invention.

When the operator selects the pad check function in the function selection display step of the main program, the pad check subroutine is performed.

The control means 60 transmits a carrier wave to the wireless recognition device 10 through the wireless reading means 20 (step S101), and the data transmitted from the wireless recognition device 10, for example, an exchange date and a maintenance factory name. The name of the operator, the mileage, the ladder resistance value, etc. are received and displayed on the display means 40 (step S102).

The remaining thickness of the pad is calculated and displayed from the received ladder resistance value (step S103), and if the remaining thickness is less than or equal to the threshold thickness (step S104), a message to display the brake pads is displayed on the display means 40 (step S105). ).

After performing the pad check subroutine described above, the control means 60 returns to the main program.

13 is a flowchart showing a method of performing a setting processing function according to the present invention.

If the operator selects the setting processing function in the function selection display step of the main program, the setting processing subroutine is executed.

In the display means 40, the menu "time change" and "erase internal memory" is displayed (step S111). When the operator selects the "time change" menu (step S112), the time is read from the clock means 50 and displayed on the display means 40 (step S113).

A message for confirming the time change, for example, a message " press the confirmation key or any key if not desired " is displayed on the display means 40 (step S114).

If the operator presses another key without pressing the confirmation key 32, the program returns to the main program, and when the operator presses the confirmation key 32 (step S115), the operator moves to the display position of the year among the displayed years, months, days, hours, and minutes. The cursor moves.

After the cursor is moved, the operator inputs the corresponding year by using the numeric keys 34 of the key input means 30, and when the confirmation key 32 is pressed, the cursor moves to the display position of the month. In the same manner, days, hours, and minutes can be changed in the same manner as described above (step S116). The clock means 50 is set to operate at this changed time (step S117), and the process returns to the main program.

The " internal memory erase " subroutine is carried out when " internal memory erase " is selected in step S111 (step S118), which is not a feature of the present invention and is described in a general manner, so that description thereof is omitted here.

According to the present invention, the data on the brake pads can be read or recorded by the non-contact wireless recognition device, so that the correct replacement timing of the brake pads can be known without disassembling the brake device. Easily check the back of the brake pad to effectively manage the traffic accidents caused by brake failure can be prevented in advance.

In addition, the brake pad checker can be made easy to carry so that the state of the brake pad can be grasped by a simple operation at the time of receiving the workshop or during operation.

Therefore, even a general driver who is indifferent to maintenance can easily grasp the wear state of the brake pad and prevent the risk of an accident due to the inoperability of the brake.

Claims (10)

A wireless recognition device 10 for storing data on the brake pads and converting the data into electromagnetic data; Wireless reading means (20) for reading electromagnetic wave data output from the wireless recognition device (10); Memory means (70) for storing a variety of data and a program for controlling the transmission and reception of data between the wireless recognition device (10) and the wireless reading means (20); Key input means (30) for inputting data with a plurality of key input buttons; Display means (40) for displaying display data; Clock means 50 for providing actual time data; Wear check device of the brake pad, characterized in that consisting of a control means for controlling the respective means (60). The apparatus of claim 1, wherein the wireless recognition device (10) comprises: a ladder resistor (15) mounted on the brake pad (17) and worn together with its wear to increase the resistance value; A data integrated circuit unit (11) for storing data on the brake pads and converting the data and the resistance values of the ladder resistors (15) into electromagnetic data; An antenna unit 12 radiating electromagnetic wave data output from the data integrated circuit unit 11 to electromagnetic waves; A rectifier 13 for rectifying the high frequency voltage input from the antenna unit 12; Brake pad wear check device, characterized in that consisting of a smoothing unit (14) for supplying power to the data integrated circuit unit (11) by smoothing the pulsating voltage output from the rectifier (13) to a DC voltage. According to claim 1, wherein the wireless recognition device 10 is provided between the pad support 16 and the brake pad 17 in the form of a capsule, the pad support 16 and the brake pad 17 is integral when manufacturing at the factory Wear check device for the brake pads, characterized in that the bonding is not possible to disassemble. The apparatus of claim 1, wherein the wireless reading means (20) comprises: a carrier generating unit (21) for generating a carrier; A high frequency amplifier 22 for modulating and amplifying the carrier wave generated by the carrier generator 21 into data input from the control means 60; Brake pad wear check device, characterized in that consisting of an antenna (23) for radiating the high frequency signal output from the high frequency amplification unit (22) into the air. According to claim 1, wherein the key input means 30 and the display means 40 is installed on the instrument panel in the driver's seat, the key input means 30 is a moving key 31 for moving the cursor displayed on the display means 40 Wow; A transmission and reception confirmation key 32 for selecting an operation for transmitting and receiving wireless data between the radio recognition device 10 and the radio reading means 20; A power key 33 for applying power; A number / english key 34 for inputting a number or alphabetic character from 0 to 9; Brake pad wear check device, characterized in that consisting of a special key (35) for selecting a special function. The method of claim 2, wherein the wireless recognition device 10 is in the form of a capsule, the ladder resistor 15 attached to one end thereof is inserted into the hole 19 formed in the brake pad 17 and the pad support (16). The brake pad is fixed and worn together with the wear of the brake pad 17 so that its resistance value changes, and the remaining thickness of the brake pad is displayed on the display means 40 according to the changing resistance value. Wear check device. Performing an initialization process after applying power; Modifying the time of the clock means 50 to the current time and storing the recognition information in the memory means 70; Displaying the function selection screen on which the keys for selecting functions of "new replacement", "pad check", and "setting" are displayed on the display means 40 after storing the recognition information; When the user selects one of the "new replacement", "pad check", "setting", the wear check method of the brake pad, characterized in that it comprises a subroutine performing the function of the key. The method according to claim 7, wherein the new exchange function subroutine, The carrier is transmitted to the wireless recognition device 10 through the wireless reading means 20, the carrier is received from the wireless recognition device 10, and the manufacturer name, date of manufacture, serial number and password code stored in the memory are read. Is a step; Receiving data transmitted from the wireless recognition device 10 through the wireless reading means 20 to determine whether it is genuine; If not genuine, displaying a message indicating " non-genuine " on the display means 40, and returning to the function selection screen of the main program; In the case of the genuine product, reading the current year, month, day, hour, minute from the clock means 50 and recording the exchange date in the wireless recognition device 10; After recording the replacement date as described above, displaying on the display means 40 a screen for inputting a maintenance factory name, a maintenance name and a mileage; The factory name, maintenance name and mileage inputted by the key input means 30 are displayed on the display means 40, and the data is transmitted to the wireless recognition device 10 via the wireless reading means 20 for recording. Wear check method of the brake pad, characterized in that consisting of steps. The method of claim 7, wherein the pad check function subroutine, Transmitting a carrier wave to the wireless recognition device 10 through the wireless reading means 20; Receiving the data transmitted from the radio recognition device (10) and displaying it on the display means (40); Calculating and displaying a remaining thickness of the pad from the received data; And displaying a message on the display means (40) to replace the brake pad when the residual thickness is less than or equal to the threshold thickness. The method of claim 7, wherein the setting processing function subroutine, Displaying a "time change" and "erase internal memory" menu on the display means 40; If the "time change" menu is selected, reading the time from the clock means 50 and displaying it on the display means 40, and displaying a message for selecting the time change; If the time change is not selected, returning to the main program, and if the time change is selected, changing the year, month, day, hour, and minute displayed on the display means (40); The wear check method of the brake pad, characterized in that consisting of the step of operating the clock means (50) is set to the changed time.