KR101902960B1 - Using accelration and rssi data tpms tire position registration device and method for operating - Google Patents

Abstract

The present invention relates to a TPMS tire position discrimination algorithm using acceleration and RSSI data. More specifically, the invention relates to a TPMS tire position discrimination algorithm using accelerations and RSSI data, And to an algorithm for discriminating between them. When the user starts the vehicle and activates the accelerator, the left and right front and rear tires increase in acceleration 0G. The TPMS sensor axis measuring the acceleration is installed on the left tire and the right tire as axes opposite to each other. The acceleration is increased and the acceleration is decreasing with the progress of the vehicle tires. A step of discriminating positions of the left and right tires through the acceleration and deceleration, and a monitoring device 40 receiving distance information of the tires and the monitoring device from the TPMS, the steps of determining the positions of front and rear tires using RSSI data .

Description

[0001] The present invention relates to an apparatus and method for determining a TPMS tire position using acceleration and RSSI data,

The present invention relates to an apparatus and method for determining a position of a TPMS tire using acceleration and RSSI data. More particularly, the present invention relates to an apparatus and method for determining a position of a tire by using a TPMS sensor, The present invention relates to a technique for determining front and rear tire positions using data.

Tire Pressure Monitoring System (hereinafter referred to as TPMS) consists of TPMS sensor and monitoring device, which allows the driver to easily identify the tire information (high pressure, low pressure, air pressure, etc.) to be. The TPMS sensor measures pressure and temperature of the tire and transmits the measured pressure to the monitoring device. The monitoring device confirms the tire information transmitted from the TPMS sensor and displays it to the user, It notifies the user when it occurs. Therefore, using TPMS, it can recognize the dangerous situations such as high pressure, low pressure, and air pressure leakage of the tire quickly, thereby preventing unexpected accident.

The conventional TPMS has to pass the process of registering the ID of the TPMS sensor (the unique identifier of the TPMS sensor for identifying the tire position) directly to the monitoring device. This requires the cumbersome procedure to re-register the TPMS sensor with the monitoring device when replacing the tire position. Therefore, TPMS is currently being studied to identify the position of a tire by itself. There is an algorithm for determining a position by a combination of current acceleration data and pressure data or a combination of two-axis acceleration data. The above methods require additional conditions that the vehicle must cross the obstruction jaws or have directional rotation sections. If these conditions are not satisfied, there is a disadvantage that the location registration can not be performed quickly.

In addition, a method of identifying the position of the TPMS sensor by attaching an initiator to four wheels of the vehicle has been developed, but it is not cost effective because a separate process and components are added for attaching the initiator. The method of determining the position of the tire using only the data measured by the TPMS sensor is typically a method of determining the position of the tire by using the two-axis acceleration data and the combination of the one-axis acceleration and the input. However, the above algorithms are difficult to distinguish immediately after driving, the algorithms are complicated, and there is a disadvantage in that the sensor consumes a lot of power because it requires real-time information transmission.

Accordingly, it is an object of the present invention to provide a method and apparatus for determining the position of a tire by using an RSSI (Received Signal Strength Indication) data, which is an acceleration provided at a predetermined position of each tire and a signal intensity received from a plurality of TMPS sensors, TPMS tire position discrimination device using acceleration and RSSI data that can easily determine the tire position without a procedure to register the TPMS sensor ID in case of changing the position and drive the TPMS (Tire Pressure Monitoring System) to the discriminated tire position And a method thereof.

In order to achieve the above object,

A plurality of TPMS (Tire Pressure Monitoring System) sensors installed at predetermined positions of left and right front and rear tires of the vehicle to measure acceleration and air pressure of the tire; And

And a monitoring device equipped with a TPMS tire position determination algorithm using the acceleration and received signal strength indication (RSSI) data,

The monitoring device comprising:

An acceleration value receiver for receiving an acceleration value of the TPMS sensor when the vehicle speed increases during straight running of the vehicle; And

And a left and right tire position determiner for determining positions of left and right tires corresponding to the plurality of TPMS sensors using the received acceleration.

Preferably, the plurality of TPMS sensors comprise:

(Positive) acceleration values with respect to the running direction of the right tire among the left and right tires of the vehicle,

And to generate a negative acceleration value with respect to the rotation direction of the left tire.

Preferably, the monitoring device

An RSSI receiver for receiving an RSSI value of an acceleration signal generated from a TPMS sensor received in a wireless communication environment; And

And a front and rear tire position determiner for estimating distances from the TPMS sensors using the RSSI values of the acceleration signals generated from the TPMS sensors received in the wireless communication environment and determining the front and rear tire positions at the estimated distances .

Preferably, the plurality of TPMS sensors

It is possible to determine the front and rear tire positions using the acceleration data of the vertical axis with respect to the running direction of the tire.

Another technical problem of the present invention using the above-described apparatus

Starting and running the vehicle;

Inputting an acceleration value of the tire to a monitoring device equipped with a TPMS tire position determination algorithm in a plurality of TPMS (air pressure) sensors provided at predetermined positions of front and rear tires of the vehicle for measuring acceleration and air pressure of the tire;

Determining whether a positive acceleration value (a positive acceleration value greater than 0G) or a negative acceleration value (a negative acceleration value smaller than OG) in the monitoring device;

Setting a right tire as the positive acceleration value and a left wheel as the negative acceleration value; And

And determining the positions of the front and rear tires using the RSSI data from the information received from the plurality of TPMS sensors in the monitoring device.

According to the present invention, an apparatus and method for determining a TPMS tire position using acceleration and RSSI data includes a step of changing the ID of a TPMS sensor installed at a predetermined position corresponding to each tire to a monitoring device The TPMS operates without registration, recognizes the tire position change without any additional conditions other than the driving of the vehicle, and drives the TPMS (Tire Pressure Monitoring System) to quickly recognize dangerous situations such as high pressure, low pressure, It is effective to prevent injurious accident.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further understand the technical idea of the invention. And should not be construed as limiting.
1 schematically shows a configuration according to the invention;
2 shows a detailed configuration of a monitoring device according to the present invention;
Fig. 3 is a view showing the axial direction of the sensor acceleration when the TPMS sensor according to the present invention is mounted on a tire. Fig.
FIG. 4 is a table for discriminating left and right tire positions according to acceleration and deceleration inputted by the TPMS sensor according to the present invention; FIG.
5 is a diagram illustrating RSSI reception for the breakdown logic of the front and rear tires according to the present invention.
FIG. 6 is a diagram illustrating an algorithm for determining positions of left and right front and rear tires through acceleration and RSSI data measured by a TPMS sensor according to the present invention. FIG.
FIG. 7 is a table for determining right and left front and rear tire positions by measuring the acceleration in the vertical direction with respect to the tire traveling direction through the TPMS sensor according to the present invention.
FIG. 8 is an operation diagram illustrating a method of determining a position of a TPMS tire using acceleration and RSSI data according to the present invention. FIG.

For a better understanding of the present invention and its operational advantages and the objects attained by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It should also be noted that the device or element orientation (e.g., "front," "back," "up," "down," "top," "bottom, Expressions and predicates used herein for terms such as "left," " right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation. Also, terms such as " first "and" second "are used in the present invention and the appended claims for the purpose of explanation and are not intended to represent or imply relative importance or purpose.

Whenever an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but it should be understood that other elements may be present in between something to do. On the other hand, when it is mentioned that an element is "directly connected" or "directly contacted" to another element, it should be understood that there are no other elements in between. Other expressions for describing the relationship between components, such as "between" and "between" or "adjacent to" and "directly adjacent to" should also be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It will be further understood that the terms " comprises ", or "having ", and the like in the specification are intended to specify the presence of stated features, integers, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

The present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view showing a configuration according to the present invention. FIG. 2 is a detailed view of the monitoring device 40 of FIG. 1. FIG. 3 is a cross- FIG. 4 is a table for discriminating the positions of left and right tires according to acceleration and deceleration input by the TPMS sensor of FIG. 1, FIG. 5 is a view showing RSSI reception for the rearrangement logic of the front and rear tires of FIG. FIG. 7 is a diagram illustrating an algorithm for determining the position of left and right front and rear tires through the acceleration and RSSI data measured by the TPMS sensor of FIG. 1, Thereby determining the positions of the left and right front and rear tires.

The TPMS tire position determination apparatus and method using the acceleration and received signal strength indication (RSSI) data according to the present invention are configured as shown in FIG. 1, including a left front tire 20a, a right front tire 20b, A plurality of TPMS sensors 30a, 30b, 30c and 30d provided at predetermined positions corresponding to the plurality of tires of the tire 20c and the right rear tire 20d and the respective tires and a monitoring device 40, .

2, the monitoring device 40 includes an acceleration value receiver 41 for receiving an acceleration value from the plurality of TPMS sensors when the speed of the vehicle increases in accordance with the straight running of the vehicle and there is a change in the acceleration; And

And a left and right tire position determiner (42) for determining left and right tire positions corresponding to the plurality of TPMS sensors using the received acceleration.

The TPMS sensors 30a, 30b, 30c and 30d are provided corresponding to the left tires 20a and 20c or the right tires 20b and 20d. As shown in FIG. 3, The TPMS sensor (including front and rear) on one side of the sensor is provided with the direction in which the tire rotates and advances due to the progress of the vehicle 10 as the X axis of the TPMS sensor on one side, (Including front and rear), the opposite direction in which the tire rotates and proceeds is set as the X axis of the TPMS sensor on the opposite side.

For example, the right front and rear tires 20b and 20d are arranged such that the advancing direction of the tire is aligned with the X axis direction of the TPMS sensor, the left front and rear tires 20a and 20c are aligned with the traveling direction of the tire, In the opposite direction.

When the rotational direction of the right front and rear tires 20b and 20d coincides with the X axis acceleration direction, the TPMS sensor detects a positive acceleration value (OG or more) that increases based on the acceleration OG in the stop state as the rotational speed of the tire increases Of the acceleration value). This is because the rotational force of the tire acts in the X-axis direction of the TPMS sensors 30b and 30d provided corresponding to the right front and rear tires. Likewise, in the case of the left front and rear tires 20a and 20c, since the rotational force of the wheel acts in the opposite direction to the axial direction of the acceleration sensor, the negative acceleration value (negative acceleration value below 0G) increases as the rotational speed of the tire increases.

The TPMS sensor inputs the measured X-axis acceleration data to a monitoring device (40). As shown in FIG. 4, the monitoring device 40 judges the two tires 20b and 20d to which two TPMS sensors having an X-axis acceleration greater than 0G are attached through the corresponding data, and the X-axis acceleration is smaller than 0G The two TPMS sensors are discriminated as the left tires 20a and 20c.

In addition, the monitoring device 40

An RSSI receiver for receiving an RSSI value of an acceleration signal generated from the plurality of TPMS sensors received in a wireless communication environment; And

Further comprising a front and rear tire position discriminator for estimating a distance to each of the TPMS sensors using the RSSI value of the acceleration signal generated from the plurality of TPMS sensors received in the wireless communication environment and discriminating the front and rear tire positions by the estimated distance can do.

5, the monitoring device 40 receives RSSI data from the plurality of TPMS sensors 30a, 30b, 30c, and 30d and transmits the RSSI data to the tires 20a, 20b, 20c , 20d are determined.

The received signal strength indication (RSSI) is an indicator for comparing the strength of a signal received in a wireless communication environment, and the intensity of the signal gradually decreases as the transmission distance increases. For example, the RSSI of the sensor having a distance closer to the monitoring device 40 is greater than the RSSI of the sensor having a longer distance, so that the monitoring device 40 can estimate the distance to the TPMS by comparing the RSSI data.

The monitoring device 40 is mounted on the dashboard of the vehicle so that the tire information measured by the plurality of TPMS sensors 30a, 30b, 30c, and 30d can be easily displayed to the driver. Since the monitoring device 40 is closer to the front tires 20a and 20b than the rear tires 20c and 20d so that the RSSI of the front tires 20a and 20b is larger than the rear tires 20c and 20d Respectively.

The monitoring device 40 compares the RSSI data of the two TPMS sensors 30b and 30d attached to the right tires 20b and 20d and registers the larger RSSI as the right front tire 20b and the smaller RSSI And registered in the right rear 20d. The monitoring device performs the same operation through the corresponding TPMS sensors 30a and 30c for the front-rear discrimination of the left tires 20a and 20c.

Fig. 6 shows an algorithm for determining the tire position using acceleration and RSSI data of two axes of the tires 20a, 20b, 20c and 20d of the vehicle 10. Fig. The measured information of the sensor is stored in the sens [i] structure. sens [i] is the TPMS sensor mounted on the ith tire, which consists of the variables x, z, rssi, and loc. Variable x and variable z indicate measured x-axis acceleration data and z-axis acceleration data, variable rssi indicates the measured RSSI value, and variable loc indicates which sensor is mounted on which tire. For example, sens [1] .x represents x-axis acceleration data of sensor # 1, and sens [4] loc represents position data of sensor # 4. Also, Var {sens [i] .z} represents the z-axis acceleration data difference of the ith sensor. First, tires having x-axis acceleration data larger than 0G are classified into groups of right tires 20b and 20d, and tires smaller than 0G are classified into left groups 20a and 20c. Next, the size of the RSSI of the two sensors in the group is compared with each other in the classified group to determine the tire having the large RSSI data as the forward position and the small tire as the rear position.

As shown in FIG. 7, the monitoring device 40 can determine the front and rear tire positions using the acceleration value of the TPMS sensor in the vertical axis with respect to the traveling direction of the tire.

The plurality of TPMS sensors have the same z-axis acceleration value when the vehicle is straight ahead, but the front tires 20a and 20b are changed in direction when the vehicle 10 performs the echo switching, while the rear tires 20c and 20d are changed There is no. When the vehicle 10 changes direction, the z-axis acceleration of the front tires 20a, 20b increases or decreases and the z-axis acceleration of the rear tires 20c, 20d is constant. If the method of determining the position of the front and rear tires using the RSSI data is not available due to obstruction by the metal shield of the vehicle body or confusion with signals of other wireless communication devices, the front and rear tire position determination algorithm The accuracy of tire position determination can be improved.

FIG. 8 is an operation diagram illustrating a TPMS tire position determination process using the acceleration and RSSI data shown in FIG. 1. Referring to FIG. 8, a TPMS tire position determination process using acceleration and RSSI data according to another embodiment of the present invention Explain.

A step S110 of starting the vehicle (S101) and running (S101);

(20a, 20b, 20c, 20d) installed at predetermined positions on the left and right front and rear tires of the vehicle to measure the acceleration and pneumatic pressure of the tire, the acceleration values of the tires are monitored by a monitoring A step S120 of inputting to a monitoring device;

Determining whether the acceleration value in the monitoring device 40 is greater than or less than 0G (S130);

(S142) if the monitoring device 40 is set to the right tire if the acceleration value is greater than 0G and to the left tire if the acceleration value is less than 0G (S142); And

The monitoring device 40 determines the positions of front and rear tires (S151 and S152) using received signal strength indication (RSSI) data through the input information (S161, S162, S163, and S164) .

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

10: Vehicle
20a: left front tire 30a left front TPMS sensor
20b: right front tire 30b right front TPMS sensor
20c: Left rear tire 30c Left rear TPMS sensor
20d: Right rear tire 30d Right rear TPMS sensor
40: Monitoring Device
41: Acceleration value receiver
42: Left and right tire position determination unit

Claims (5)

A TPMS tire position discrimination apparatus using acceleration and RSSI (Received Signal Strength Indication) data,
A plurality of TPMS (Tire Pressure Monitoring System) sensors installed at predetermined positions of the front and rear tires of the left and right sides of the vehicle to measure acceleration and air pressure of the tire; And
And a monitoring device equipped with a tire position determination algorithm using the acceleration and the RSSI data,
The monitoring device comprising:
An acceleration value receiver for receiving an acceleration value of the TPMS sensor when the vehicle speed increases during straight running of the vehicle;
A left and right tire position determiner for determining positions of left and right tires corresponding to the plurality of TPMS sensors using the received acceleration; And
An RSSI receiver for receiving an RSSI value of an acceleration signal generated from a TPMS sensor received in a wireless communication environment; And
And a front and rear tire position determiner for estimating distances from the TPMS sensors using the RSSI values of the acceleration signals generated from the TPMS sensors received in the wireless communication environment and determining the front and rear tire positions by the estimated distances,
The TPMS sensor
Determining front and rear tire positions using acceleration data of a vertical axis with respect to a running direction of the tire,
The vertical axis acceleration data before and after the position determination portion Thai RSSI value that can not be calculated from the TPMS conditions Tire by the acceleration data and RSSI, characterized in that which is used to determine the front and rear Thai position location determination device. The system of claim 1, wherein the TPMS sensor comprises:
And may be provided to generate a positive acceleration value with respect to the running direction of the right tire among the left and right tires of the vehicle so as to generate a negative acceleration value with respect to the rotational direction of the left tire And TPMS tire position determination device using acceleration and RSSI data.
delete delete A method of determining TPMS tire position using acceleration and RSSI data,
Starting and running the vehicle;
Inputting an acceleration value of the tire to a monitoring device equipped with a TPMS tire position determination algorithm in a plurality of TPMS (air pressure) sensors provided at predetermined positions of front and rear tires of the vehicle for measuring acceleration and air pressure of the tire;
Determining whether a positive acceleration value (a positive acceleration value larger than 0G) or a negative acceleration value (a negative acceleration value smaller than 0G) in the monitoring device;
Setting a right tire as the positive acceleration value and a left wheel as the negative acceleration value; And
And determining the positions of the front and rear tires using the RSSI data from the information received from the plurality of TPMS sensors in the monitoring device,
Wherein the step of determining the positions of the front and rear tires comprises:
The TPMS sensor determines the front and rear tire positions using the acceleration data of the vertical axis with respect to the traveling direction of the tire, and the acceleration data of the vertical axis is used to determine the front and rear tire positions in a situation where the RSSI value can not be calculated A method for determining TPMS tire position using acceleration and RSSI data.

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