CN210911907U

CN210911907U - Tire pressure monitoring device

Info

Publication number: CN210911907U
Application number: CN201921827943.6U
Authority: CN
Inventors: 陈昆; 杨小清; 耿玉银; 蒋震
Original assignee: Wuhan Qiwu Technology Co ltd
Current assignee: Wuhan Qiwu Technology Co ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-07-03
Anticipated expiration: 2029-10-28

Abstract

The utility model relates to the technical field of tire pressure monitoring of tires, and discloses a tire pressure monitoring device of a tire, which comprises a detection terminal and a monitoring terminal, wherein the detection terminal comprises a gravity sensor, an ultrasonic sensor, a controller and a wireless communication circuit; the gravity sensor and the ultrasonic sensor are both arranged on the vehicle body, and a probe of the ultrasonic sensor is arranged towards the ground; the gravity sensor is electrically connected with the controller; the ultrasonic sensor is electrically connected with the controller; the controller is electrically connected with the wireless communication circuit and is wirelessly connected with the monitoring terminal through the wireless communication circuit. The utility model discloses it need not to contact the tire to have tire pressure monitoring, can not cause the technological effect of influence to the tire.

Description

Tire pressure monitoring device

Technical Field

The utility model relates to a tire pressure monitoring technology field, concretely relates to tire pressure monitoring device.

Background

The tire pressure is directly related to driving safety, the tire pressure is monitored in real time, and the abnormal tire pressure is timely reminded, so that potential safety hazards caused by the abnormal tire pressure can be effectively reduced; in the prior art, the tire pressure is generally detected by directly contacting the tire with the pressure sensor, and the performance of the sensor and the performance of the tire are influenced to a certain extent by the detection mode.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned technique not enough, provide a tire pressure monitoring device, solve among the prior art tire pressure detection and need sensor direct contact tire, cause the technical problem of influence to tire performance and sensor performance.

In order to achieve the technical purpose, the technical scheme of the utility model provides a tire pressure monitoring device for a tire, which comprises a detection terminal and a monitoring terminal, wherein the detection terminal comprises a gravity sensor, an ultrasonic sensor, a controller and a wireless communication circuit;

the gravity sensor and the ultrasonic sensor are both arranged on the vehicle body, and a probe of the ultrasonic sensor is arranged towards the ground; the gravity sensor is electrically connected with the controller, the ultrasonic sensor is electrically connected with the controller, and the controller is electrically connected with the wireless communication circuit and is wirelessly connected with the monitoring terminal through the wireless communication circuit.

Compared with the prior art, the beneficial effects of the utility model include: the utility model converts the detection of the tire pressure into the detection of the distance, adopts the gravity sensor and the ultrasonic sensor, the two sensors are both arranged on the vehicle body and do not need to be contacted with the tire, the gravity sensor is used for detecting the inclination angle between the tire and the gravity direction, the ultrasonic sensor is used for detecting the detection distance between the detection surface and the ground, the real-time vertical distance between the contact point of the tire and the ground and the detection surface can be calculated according to the inclination angle and the detection distance, when the tire pressure of the tire is abnormal, the tire deforms, the real-time vertical distance is smaller than the normal vertical distance between the contact point of the tire and the detection surface when the tire pressure of the tire is normal, the controller judges whether the tire pressure of the tire is normal or not by comparing the real-time vertical distance with the normal vertical distance, and an abnormal signal is sent to the monitoring terminal through the wireless communication circuit, so that the tire pressure monitoring without contact with the tire is realized.

Drawings

Fig. 1 is a circuit structure diagram of an embodiment of the tire pressure monitoring device of the present invention;

FIG. 2 is a schematic diagram illustrating a real-time vertical distance calculation in an embodiment of a tire pressure method of a vehicle tire provided by the present invention;

fig. 3 is an installation schematic diagram of an embodiment of the tire pressure monitoring device provided by the present invention.

Reference numerals:

1. the device comprises a detection terminal, 11, a gravity sensor, 12, an ultrasonic sensor, 13, a controller, 14, a wireless communication circuit, 2, a monitoring terminal, 10 and a tire.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

As shown in fig. 1, embodiment 1 of the present invention provides a tire pressure monitoring device for a tire, including a detection terminal 1 and a monitoring terminal 2, where the detection terminal 1 includes a gravity sensor 11, an ultrasonic sensor 12, a controller 13, and a wireless communication circuit 14;

the gravity sensor 11 and the ultrasonic sensor 12 are both mounted on a vehicle body, and a probe of the ultrasonic sensor 12 is arranged towards the ground; the gravity sensor 11 is electrically connected with the controller 13 and is used for detecting the inclination angle between the tire 10 and the gravity direction; the ultrasonic sensor 12 is electrically connected with the controller 13 and is used for detecting the detection distance between the detection surface where the probe is located and the ground; the controller 13 is electrically connected to the wireless communication circuit 14 and wirelessly connected to the monitoring terminal 2 through the wireless communication circuit 14, the controller 13 is configured to determine whether the tire 10 is in an abnormal state according to the inclination angle and the detection distance, and send an abnormal signal to the monitoring terminal 2 through the wireless communication circuit 14 when the tire 10 is in the abnormal state, and the monitoring terminal 2 is configured to send an abnormal prompt according to the abnormal signal.

The utility model provides a tire pressure monitoring device, its tire pressure detection principle does: when the tire pressure of the bicycle tire is abnormal, the tire deforms, the height of the tire changes, and based on the change, the detection of the tire pressure is converted into the detection of the distance. The real-time vertical distance between the detection surface and the ground is detected through the ultrasonic sensor, the detection surface of the ultrasonic sensor is preferably arranged in parallel with the ground, when the tire pressure of a tire changes, the real-time vertical distance between the detection surface of the probe of the ultrasonic sensor 12 and the road surface also changes, the ultrasonic sensor 12 transmits detection distance data to the controller 13 in real time, the gravity sensor 11 detects the space attitude of the wheel in real time, transmits inclination angle data of the wheel to the controller 13 in real time, and the auxiliary ultrasonic sensor 12 determines the tire pressure state more accurately. The vertical distance between the contact point of the tire 10 and the ground and the detection surface can be calculated according to the inclination angle and the detection distance. When the tire pressure is abnormal, namely the real-time vertical distance when the tire is flat can be obviously smaller than the normal vertical distance when the tire pressure is normal, so that the monitoring of the tire pressure abnormality can be realized by monitoring the real-time vertical distance.

Specifically, the calculation principle of the real-time vertical distance is shown in fig. 2, where X in fig. 2 represents the ground, Y represents the gravity direction, and the real-time vertical distance between the tire 10 and the ground contact point to the detection surface is calculated according to the inclination angle and the detection distance:

b＝d-c/cotβ

wherein b is the real-time vertical distance, d is the detection distance, c is the horizontal distance between the contact point of the tire 10 and the ground and the vertical plane of the detection surface, c is a constant, and β is the inclination angle;

the above-mentioned calculating process adopts prior art to realize for having utilized simple trigonometric function theory of calculation, the utility model discloses do not relate to the improvement to this. After the real-time vertical distance calculates simultaneously, its and normal vertical distance's comparison is simple threshold value comparison judgement process, adopts current control logic to realize, the utility model discloses do not relate to the improvement to this yet.

The horizontal distance and the normal vertical distance are related to the installation position of the ultrasonic sensor 12, and thus some deviation may occur between the horizontal distance and the normal vertical distance when the vehicle body is repaired or used for an excessively long time, and thus it is preferable to calibrate the horizontal distance and the normal vertical distance. The calibration of the normal vertical distance is achieved by using the ultrasonic sensor 12 and the gravity sensor 11, that is, the real-time vertical distance is detected and calculated as the normal vertical distance when the tire pressure is normal. The calibration of horizontal distance can set up an ultrasonic sensor for calibration again, and ultrasonic sensor for the calibration is connected with the controller electricity, and ultrasonic sensor for the calibration and ultrasonic sensor 12 fixed connection, and detection direction mutually perpendicular, and ultrasonic sensor sets up along the axis direction of tire pivot for the calibration, and sets up towards the tire pivot for horizontal distance's calibration, ultrasonic sensor for the calibration is generally in the off-state, gets into operating condition during the calibration, in order to save the electric quantity. The calibration can be divided into manual calibration and automatic calibration, the automatic calibration is automatically performed by the controller 13 sending a calibration instruction at a set time interval, and the manual calibration is performed by the monitoring terminal 2 manually sending a calibration instruction to the detection terminal 1 for calibration when a user is in maintenance or the like.

The ultrasonic sensor 12 in this embodiment adopts an active ultrasonic sensor 12, and the active ultrasonic sensor 12 can transmit ultrasonic waves and receive reflected waves, and the distance between the active ultrasonic sensor 12 and the detection target can be determined by measuring the time interval between transmission and reception. Specifically, the present embodiment employs an ultrasonic sensor 12 of the type TELESKY US-015. The gravity sensor 11 works by using the positive piezoelectric effect, that is, for a heteropolar crystal without a symmetric center, an external force applied to the crystal not only deforms the crystal, but also changes the polarization state of the crystal to establish an electric field inside the crystal. When the crystal inside the sensor is polarized due to deformation to generate a voltage, the relationship between the generated voltage and the applied acceleration is known to convert the acceleration into a voltage output. The utility model discloses well gravity sensor 11 is used for monitoring the space gesture of wheel, rectifies for getting rid of because of the vehicle turns to or factor such as rugged road surface leads to the interference that ultrasonic sensor 12 probe horizontal vertical alignment leveled ground and produced, and supplementary ultrasonic sensor 12 confirms the tire pressure state more accurately. Specifically, the present embodiment employs a three-axis gravity acceleration sensor with a model number of TELESKY ADXL 345; the controller 13 is a Huada MCU controller with model number HC32F 460.

The utility model discloses the type variable of the distance indirect measurement tire contact road surface part based on ultrasonic sensor's 12 probe and road surface, this distance will change when the tire pressure is unusual to rectify this distance through gravity sensor 11, remove the interference of factors such as vehicle steering, and ultrasonic sensor 12 and gravity sensor 11 all need not the direct contact tire.

Preferably, each tire 10 is provided with one detection terminal 1, and the wireless communication circuit 14 of each detection terminal 1 is wirelessly connected with the monitoring terminal 2.

Each tire 10 is provided with a detection terminal 1, so that the detection of the tire pressure of each tire 10 is realized. Specifically, each detection terminal 1 can also perform wireless communication connection through its own wireless communication circuit 14, and after the connection is successful, only one of the detection terminals 1 needs to be connected with the monitoring terminal 2, so that the abnormal tire pressure condition of each wheel can be transmitted to the monitoring terminal 2.

Preferably, as shown in fig. 3, the bicycle body is a bicycle, there are two detection terminals 1, one detection terminal 1 is installed on a front fork of the bicycle and located below a shock absorber, the other detection terminal 1 is installed at a joint of a rear upper fork and a rear lower fork of the bicycle, and the wireless communication circuits 14 of the two detection terminals 1 are both wirelessly connected with the monitoring terminal 2.

The detection terminal 1 of front wheel is installed on the front fork, and is located the below of bumper shock absorber, is located the bumper shock absorber below in order to get rid of the bumper shock absorber and stretches out and draws back the interference to the detection distance, and the detection terminal 1 of rear wheel is in back upper fork and back lower fork junction, and the ultrasonic sensor 12 probe of two detection terminal 1 all aims at ground perpendicularly. Two detection terminal 1 install respectively on bicycle front fork and back fork, need not additionally set up monitoring devices's initial parameter after changing wheel or tire.

Preferably, the wireless communication circuit 14 is a bluetooth circuit or an ANT + wireless circuit.

The wireless communication circuit 14 may be implemented using conventional techniques. Specifically, the Bluetooth circuit can be realized by a Jinou BLE0305C2P Bluetooth chip, and the ANT + wireless band can be realized by an ANT ANT-E01-ML01D wireless chip.

Preferably, the monitoring terminal 2 is an intelligent code meter, an intelligent mobile phone or an electronic instrument panel.

Monitoring terminal 2 is mainly used for feeding back unusual signal of tire pressure, realizes the function of unusual warning, therefore all can regard as monitoring terminal 2 to use as the smart machine of radio communication function. The intelligent code table is the electronic equipment that is used for showing the data of riding that rides commonly used in the in-process of riding, adopts intelligent code table as monitor terminal 2 to make intelligent code table possess tire pressure anomaly monitoring function, need not additionally to increase equipment. The smart phone is an electronic device commonly used in daily life of people, and the smart phone has the advantages of convenience and practicability when used as the monitoring terminal 2. The electronic instrument panel is a common electronic device used for displaying the working condition of the automobile in the automobile, the electronic instrument panel is used as the monitoring terminal 2, additional equipment does not need to be added, and the tire pressure abnormity monitoring function is integrated in the electronic instrument panel.

Preferably, the wireless communication circuit 14 may be configured to transmit data detected by the gravity sensor 11 and the ultrasonic sensor 12 in addition to the tire pressure abnormality signal, and the data detected by the gravity sensor 11 and the ultrasonic sensor 12 may be used as a basis for determining the tire pressure abnormality detection. For example, the data detected by the gravity sensor 11 and the ultrasonic sensor 12 may reflect the posture change of the vehicle body, thereby realizing the recording of the posture of the vehicle body.

The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The tire pressure monitoring device is characterized by comprising a detection terminal and a monitoring terminal, wherein the detection terminal comprises a gravity sensor, an ultrasonic sensor, a controller and a wireless communication circuit;

2. The tire pressure monitoring device of claim 1, wherein each tire has a detection terminal mounted thereon, and the wireless communication circuit of each detection terminal is wirelessly connected to the monitoring terminal.

3. The tire pressure monitoring device according to claim 1, wherein the vehicle body is a bicycle, the number of the detecting terminals is two, one of the detecting terminals is mounted on a front fork of the bicycle and located below the shock absorber, the other detecting terminal is mounted at a joint of a rear upper fork and a rear lower fork of the bicycle, and the wireless communication circuits of the two detecting terminals are both wirelessly connected with the detecting terminal.

4. The tire pressure monitoring device of claim 1, wherein the wireless communication circuit is a bluetooth circuit or an ANT + wireless circuit.

5. The tire pressure monitoring device of the vehicle tire according to claim 1, wherein the monitoring terminal is a smart stopwatch, a smart phone or an electronic instrument panel.