KR-102962103-B1 - TIRE PRESSURE MONITORING SYSTEM AND METHOD FOR DETECTING WRONG OPERATION THEREOF

KR102962103B1KR 102962103 B1KR102962103 B1KR 102962103B1KR-102962103-B1

Abstract

The present invention relates to a tire pressure monitoring device and a method for detecting malfunctions therein, which prevents system reset caused by user error in a low tire pressure state. The device comprises a wheel speed sensor mounted on each wheel of a vehicle, a setting button for resetting the air pressure setting, and a controller that determines whether the tire pressure is low using the wheel speed sensor and outputs a low pressure warning. The controller, upon detecting operation of the setting button after the low pressure warning, checks whether the user intends to reset the air pressure setting and performs the air pressure setting reset according to the user's response.

Inventors

조재성
강용구

Assignees

현대자동차주식회사
기아 주식회사

Dates

Publication Date: 20260511
Application Date: 20201110

Claims (18)

Wheel speed sensors mounted on each wheel of the vehicle; A setting button for resetting the air pressure setting; and It includes a controller that determines whether the tire pressure is low using the wheel speed sensor and outputs a low pressure warning. The above controller is, At least one of the change in tire diameter and the change in frequency obtained through analysis of the tire's diameter and frequency at the time of the above low pressure warning is stored as tire air pressure judgment information, A tire pressure monitoring device characterized by detecting operation of the setting button after the above low pressure warning, checking whether the user intends to reset the air pressure setting, and performing the air pressure setting reset according to the user's response.
Wheel speed sensors mounted on each wheel of the vehicle; A setting button for resetting the air pressure setting; and It includes a controller connected to the above-mentioned wheel speed sensor and the above-mentioned setting button, and The above controller is, Using the wheel speed sensor mentioned above, check whether the tire pressure is low, output a low pressure warning, and store the tire pressure determination information. When stopping and operation of the above setting button are detected, it enters a tire pressure setting reset prohibition mode, and In the above air pressure setting reset prohibition mode, if incorrect operation of the above setting button is detected, a low pressure warning is output, and A tire pressure monitoring device characterized by including at least one of the tire pressure determination information obtained through tire pressure diameter and frequency analysis, and a tire pressure change amount.
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In claim 2, The above controller is, A tire pressure monitoring device characterized by counting the number of low pressure occurrences when at least one of the above-mentioned change in diameter and the above-mentioned change in frequency exceeds a threshold, and outputting the low pressure warning when the number of low pressure detections exceeds a reference number.
In claim 2, The above controller is, A tire pressure monitoring device characterized by monitoring the tire pressure status using previously stored tire pressure judgment information as the initial value when the vehicle stops and then drives again.
In claim 2, The above controller is, A tire pressure monitoring device characterized by determining that if the setting button is operated again within a predetermined time from the point in time when the low pressure warning is output in the above air pressure setting initialization prohibition mode, it is an incorrect operation of the setting button.
In claim 5, The above controller is, A tire pressure monitoring device characterized by determining that the operation of the setting button is a normal operation when the setting button is operated again after a predetermined time has elapsed since the point in time when the low pressure warning is output in the above air pressure setting initialization prohibition mode.
In claim 2, The above controller is, A tire pressure monitoring device characterized by counting the number of errors whenever an error in the setting button is detected, and releasing the low pressure warning and performing the air pressure setting initialization when the number of errors exceeds a threshold.
In claim 2, The above controller is, A tire pressure monitoring device characterized by releasing the low pressure warning while maintaining the air pressure setting reset prohibition mode when the operation of the setting button is normal operation in the above air pressure setting reset prohibition mode.
In claim 2, The above controller is, A tire pressure monitoring device characterized by releasing the low pressure warning and releasing the air pressure setting reset prohibition when the tire pressure is confirmed to be in a normal state in the above air pressure setting reset prohibition mode.
In claim 2, The above controller is, A tire pressure monitoring device characterized by outputting the low pressure warning again and maintaining the tire pressure setting reset prohibition mode when the tire pressure is detected to be in an abnormal state when the tire pressure is in the above tire pressure setting reset prohibition mode.
A step of checking the tire pressure status using a wheel speed sensor; A step of outputting a low pressure warning if the above tire pressure is determined to be in a low pressure state; A step of confirming whether the driver intends to reset the tire pressure setting when operation of the setting button is detected during the above low pressure warning; and If the above driver has an intention to reset the tire pressure setting, the method includes the step of performing a tire pressure setting reset. The step of outputting the above low pressure warning is, A method for detecting malfunction of a tire pressure monitoring device, characterized by including the step of storing at least one of the change in tire diameter and the change in frequency obtained through analysis of the tire's diameter and/or frequency as tire pressure information.
In claim 12, The step of checking whether there is an intention to reset the above air pressure settings is, A method for detecting malfunction of a tire pressure monitoring device, characterized by including a step of allowing the driver to select, by default, that there is no intention to reset the air pressure setting.
A first step of detecting a low tire pressure state using a wheel speed sensor, outputting a low pressure warning, and storing tire pressure determination information; A second step of detecting operation of the stop and setting button after the above low pressure warning, entering a mode to prohibit air pressure setting initialization, and determining whether the operation of the setting button is an incorrect operation; and It includes a third step of outputting a low-pressure warning if the operation of the above setting button is determined to be an incorrect operation, and A method for detecting malfunction of a tire pressure monitoring device, characterized in that the above tire pressure determination information includes at least one of the change in tire diameter and the change in frequency obtained through analysis of the tire's diameter and/or frequency.
In claim 14, The above first step is, A step of checking whether at least one of the change amount of the tire's diameter change amount and the change amount of the frequency change amount exceeds a threshold; A step of counting the number of low-pressure detections when at least one change amount exceeds the threshold; A step of outputting the low pressure warning when the number of low pressure detections exceeds a reference number; and A method for detecting malfunction of a tire pressure monitoring device, characterized by including the step of storing at least one change amount.
In claim 14, The above second step is, A step of determining a misoperation of the setting button if the setting button is operated again within a predetermined time from the point in time when the low pressure warning is output; and A method for detecting malfunction of a tire air pressure monitoring device, characterized by including a step of determining normal operation of the setting button when the setting button is operated after a predetermined time has elapsed from the point in time when the low pressure warning is output.
In claim 16, The above third step is, A step of counting the number of errors when an error in operation of the above setting button is determined; and A method for detecting malfunctions in a tire air pressure monitoring device, characterized by further including the step of releasing the low pressure warning and performing an air pressure setting initialization when the number of malfunctions exceeds a threshold number.
In claim 16, The above third step is, A method for detecting malfunction of a tire pressure monitoring device, characterized by further including the step of releasing the low pressure warning when normal operation of the above setting button is detected, and learning the tire pressure using the above wheel speed sensor and storing the learned value.

Description

Tire Pressure Monitoring System and Method for Detecting Wrong Operation Thereof The present invention relates to a tire pressure monitoring device and a method for detecting malfunctions thereof. A Tire Pressure Monitoring System (TPMS) is a safety system that prevents accidents caused by tire damage by detecting tire pressure and warning the driver when it is insufficient. The tire pressure measurement methods of such TPMS are classified into a direct method, which directly measures internal tire pressure through sensors, and an indirect method, which measures internal tire pressure using wheel speed measured by a wheel speed sensor. Among these, if a driver unintentionally operates the reset button without adjusting the tire pressure, the indirect TPMS may determine that point in time as normal pressure; consequently, it may fail to alert the driver to the low pressure condition or delay the alert, even if the actual tire pressure is low. FIG. 1 illustrates a block diagram of a tire air pressure monitoring device according to embodiments of the present invention. FIG. 2 illustrates the operation mode transition diagram of a tire air pressure monitoring device according to embodiments of the present invention. FIG. 3 is a flowchart illustrating a method for detecting a malfunction of a tire air pressure monitoring device according to one embodiment of the present invention. Figure 4 is an example diagram illustrating a step-by-step display screen according to the malfunction detection method shown in Figure 3. FIG. 5 is a flowchart illustrating a method for detecting a malfunction of a tire air pressure monitoring device according to another embodiment of the present invention. FIG. 6 illustrates a timing diagram showing the process of initializing after adjusting tire pressure in a low-pressure state according to embodiments of the present invention. FIG. 7 illustrates a timing diagram showing the process of initializing without adjusting tire pressure in a low-pressure state according to embodiments of the present invention. FIG. 8 is a timing diagram for explaining the situation of entering an initialization prohibition mode according to embodiments of the present invention. FIG. 9 is a timing diagram for explaining a situation in which a low-pressure warning is maintained in an initialization prohibition mode according to embodiments of the present invention. FIG. 10 is a timing diagram for explaining a situation in which a low-pressure warning is released after entering an initialization prohibition mode according to embodiments of the present invention. FIG. 11 is a timing diagram for explaining a situation in which a transition occurs from an initialization prohibition mode to a learning mode according to embodiments of the present invention. Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted. In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. FIG. 1 illustrates a block diagram of a tire air pressure monitoring device according to embodiments of the present invention. Referring to FIG. 1, the tire pressure monitoring device (100) may include wheel speed sensors (110), a setting button (120), an output device (130), and a controller (140). A wheel speed sensor (110) is mounted on a wheel to measure wheel speed (wheel speed) while the vehicle is in motion. For example, wheel speed sensors (111, 112, 113, 114) can be mounted on the left front wheel, the right front wheel, the left rear wheel, and the right rear wheel, respectively. The measurement signal output from the wheel speed sensor (110) can be used to measure the tire's radius and frequency change. The setting button (120) can generate data based on user operat