CN209208380U - One kind not powering off tyre pressure sensor and air tube - Google Patents

Abstract

The utility model relates to tyre pressure sensor or air tube fields, and on the one hand disclosing one kind and not powering off tyre pressure sensor includes: sequentially connected pressure sensor chip, controller, Rechargeable battery, rectification and charging circuit and charge coil；In addition, the controller is also connected with radiofrequency launcher.Wherein, the charge coil is Rechargeable battery charging through over commutation and charging circuit for generating induced current.On the other hand a kind of air tube is disclosed, which is provided with the above-mentioned whole components for not powering off tyre pressure sensor.Utility model has the advantages that recycling electric energy when electric car brake is utilized well, wireless charging is carried out to tyre pressure sensor by way of electromagnetic induction；Due to automobile frequent brake in the process of moving, allow the electric energy supplement of the utility model at any time, realizes the work not powered off.In addition, the utility model also has the function of the features such as structure is simple, reliable, cost is low and popularization is good.

Description

A kind of continuously electric tire pressure sensor and automobile inner tube

technical field

The utility model relates to the field of a tire pressure sensor or an automobile inner tube, in particular disclosing a tire pressure sensor with continuous electricity and the inner tire of an automobile.

Background technique

The tire pressure sensor of the car is installed in the tire of the car. It has a high-precision temperature sensor chip and a pressure sensor chip, which are used to detect the air pressure and temperature in the car tire in real time; and transmit it to the receiver in the cab through radio frequency. Device, and then remind the driver of abnormal tire pressure, to ensure driving safety.

Because the tire pressure sensor is installed in the tire, it is not easy to disassemble it. Therefore, most tire pressure sensors are disposable products and are discarded when the battery power is exhausted. There are disclosed tire pressure sensors capable of wireless charging in the existing technology. For example, a magnetic field is generated by an energized coil arranged near the wheel and connected to the battery, and then the coil connected to the charging unit is used to cut the magnetic field to supplement electric energy; and for example, a magnetic field is generated by a permanent magnet, and then the coil connected to the charging unit is used Cut the magnetic field to supplement electric energy; in the above two methods, the electrified coil method needs to use the electric energy in the battery to supplement electric energy for the charging unit; although the permanent magnet method does not consume additional electric energy, when it is placed near the wheel or When it is near the fender, due to the limitation of the number of permanent magnets and the distance from the wheel, its efficiency is low, and it is easily damaged and invalidated by foreign objects.

Utility model content

In view of the above situation, according to one aspect of the utility model, a kind of continuous electric tire pressure sensor is disclosed, including: a pressure sensor chip, a controller, a rechargeable battery, a rectification and charging circuit and a charging coil connected in sequence; wherein, the The pressure sensor chip is used to detect the tire pressure of the tire; the controller is used to control the hardware connected to it; the rechargeable battery is used to supply power to the control module; the charging coil is arranged in the tire cavity, and Its normal line points to the center of the hub, and is used to couple with the hub coil set on the hub for recovering electric energy to generate current; the rectification and charging circuit is used to rectify the current generated by the charging coil to generate the current. Rechargeable battery charging.

Preferably, when the tire rotates, the charging coil can perform synchronous circular motion with the hub coil.

More preferably, the charging coil generates an induced current by cutting the magnetic field generated by the hub coil.

Preferably, the continuous power tire pressure sensor further includes: a radio frequency transmitter; the radio frequency transmitter is connected to the controller and is used to generate and transmit radio frequency signals.

More preferably, the radio frequency transmitter is also connected with an antenna.

Preferably, the controller is: single-chip microcomputer, ARM, MCU or CPU.

Preferably, the continuous power tire pressure sensor further includes: a temperature sensor chip; the temperature sensor chip is connected to the controller for detecting the temperature of the gas in the tire.

Preferably, the rechargeable battery is: a rechargeable lithium battery.

According to another aspect of the present utility model, an automobile inner tube is disclosed. The interior of the automobile inner tire is provided with the continuous current tire pressure sensor described in any one of the above.

Preferably, the charging coil of the tire pressure sensor is laid flat on the inner wall of the inner tire of the automobile near the hub.

The utility model has the advantages of: making good use of the electric energy recovered when the electric vehicle brakes, and wirelessly charging the tire pressure sensor through electromagnetic induction; due to the frequent braking action of the vehicle during driving, the utility model can The supplementary electric energy realizes the work of uninterrupted power supply; in addition, the utility model also has the characteristics of simple structure, reliable function, low cost and good popularity.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating preferred embodiments, and are not considered to limit the present invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

Accompanying drawing 1 shows the composition schematic diagram of an alternative embodiment of a continuous electric tire pressure sensor.

Figure 2 shows a schematic structural view of a hub provided with hub coils.

Accompanying drawing 3 shows the schematic diagram of the installation position of the tire pressure sensor of continuous electricity.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

As shown in FIG. 1 , it is a schematic composition diagram of an optional embodiment of a continuous electric tire pressure sensor. Wherein, the continuous power tire pressure sensor includes: MCU, pressure sensor chip, radio frequency transmitter, antenna, rechargeable lithium battery, rectification and charging circuit and charging coil. Wherein, the radio frequency transmitter is connected with the antenna for generating and transmitting radio frequency signals; the MCU is respectively connected with the pressure sensor chip, radio frequency transmitter and rechargeable lithium battery for controlling the collection of pressure signals and Generation and transmission of radio frequency signals; the rechargeable lithium battery is sequentially connected with a rectification and charging circuit and a charging coil. Wherein, the charging coil is used to cut the magnetic field generated by the hub coil in the electric vehicle, thereby generating an induced current; the rectifying and charging circuit is used to receive the induced current, rectify it and charge the rechargeable lithium battery. In addition, the working process of the utility model also includes, under the control of the MCU, periodically transmitting the tire pressure signal in the pressure sensor chip to the radio frequency transmitter, and finally sending it to the utility model by the antenna connected to the radio frequency transmitter. Receivers other than new models.

In the above, the continuous power tire pressure sensor can also be replaced by a sensing module with both a pressure sensor chip and a temperature sensor chip, which can detect the temperature of the gas in the inner tube of the car while detecting the tire pressure; the advantage is that when When either the pressure sensor chip or the temperature sensor chip fails, the data of the non-failure chip can be used for auxiliary judgment; the disadvantage is that the cost is higher than that of a single pressure sensor chip, and the corresponding volume is larger; therefore , based on the stable performance of the current sensor chip and considering the cost and volume, a single pressure sensor chip is used in this embodiment to monitor the tire pressure. The MCU can also be replaced by a single-chip microcomputer, ARM or CPU. On the basis of comprehensive consideration of the use effect and cost, the MCU is selected in this embodiment to control the hardware connected to it. The rechargeable lithium battery can also be replaced by a nickel-chromium battery or a nickel-hydrogen battery, wherein a nickel-hydrogen battery of the same volume is heavier than a nickel-chromium battery and a lithium battery, and the nickel-chromium battery has a memory effect. Before charging, when the battery When the power is not completely exhausted, the battery capacity will be reduced; therefore, in this embodiment, a lithium battery with lighter weight and better charging performance is selected. The installation position and working process of the continuous electric tire pressure sensor will be described below in conjunction with the following drawings:

As shown in FIG. 2 , it is a structural schematic diagram of a hub provided with hub coils. Wherein, 1 is a wheel hub, 2 is a permanent magnet, 3 is a stator support, 4 is a hub coil, 5 is a bearing, 6 is a shaft, 7 is an inner tube, and 8 is an outer tire. Among them, the stator bracket 3 is fixed on the shaft 6, the hub coil 4 is wound on the stator bracket 3, and the permanent magnet 2 is fixed on the hub 1, then the electric energy recovery process of the hub motor is, when the automobile brakes, the hub coil 4 becomes a conductor (the hub coil 4 does not constitute a conducting loop during normal driving, so no induced current is generated), at this time, the induced current will be generated due to the magnetic field of the hub coil cutting the permanent magnet, which is collected by other parts in the power recovery device. The recovery of electric energy is completed after the induction current. The tire pressure sensor of the utility model is optionally placed in the inner tube 7, specifically as follows:

As shown in Figure 3, it is a schematic diagram of the installation position of the continuous electric tire pressure sensor. Among them, 1 is the wheel hub, 2 is the permanent magnet, 3 is the stator bracket, 4 is the hub coil, 6 is the shaft, 9 is the continuous power tire pressure sensor module (that is, the part other than the charging coil), and 10 is the charging coil. As shown in the figure, when the automobile tire rotates, the permanent magnet 2 arranged on the hub 1 and the charging coil 10 arranged inside the inner tube will pass through the hub coil 4 in sequence, and just meet the space formed by the hub coil 4. The areas are opposite; when the permanent magnet 2 passes through the hub coil 4, the hub coil 4 cuts the magnetic field of the permanent magnet 2 to generate an induced current, at this time the hub coil 4 itself will also generate a magnetic field; when the charging coil 10 passes through the hub coil 4, The charging coil 10 generates an induced current due to the magnetic field generated by cutting the hub coil 4 , and then can charge the rechargeable lithium battery through a rectification and charging circuit. In Fig. 3, the situation of the charging coil shown in the figure is only to show its spatial position relationship. In fact, the charging coil 10 is arranged on the inner wall of the inner tire near the hub side in a tiled manner, and the projection plane of the area surrounded by it The vector points to the center of the hub.

In addition, the utility model also discloses an automobile inner tube provided with all parts of the continuous electric tire pressure sensor. The optional arrangement (not including the number) of the charging coils of the tire pressure sensor in the inner tube is shown in FIG. 3 .

The utility model makes good use of the electric energy recovered when the electric vehicle brakes, and wirelessly charges the tire pressure sensor through electromagnetic induction; due to the frequent braking action of the vehicle during driving, the utility model can supplement the electric energy at any time, Realize the work of uninterrupted power supply; in addition, the utility model also has the characteristics of simple structure, reliable function, low cost and good popularity.

Finally, it should be pointed out that the number of stator brackets, hub coils and permanent magnets shown in the drawings does not represent the actual number, and the drawings are only to illustrate the principle; the charging coil is actually made of multi-turn coils, and one tire The pressure sensor can be connected with multiple charging coils. At this time, the charging coils should be properly distributed on the inner wall of the inner tube with the axis as the center.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. A continuous electric tire pressure sensor is characterized in that, comprising: a pressure sensor chip, a controller, a rechargeable battery, a rectification and charging circuit and a charging coil connected in sequence; wherein, The pressure sensor chip is used to detect the tire pressure of the tire; The controller is used to control the hardware connected to it; The rechargeable battery is used to power the control module; The charging coil is arranged in the tire cavity, and its normal line points to the center of the hub, and is used to couple with the hub coil provided on the hub for recovering electric energy to generate current; The rectification and charging circuit is used for rectifying the current generated by the charging coil to charge the rechargeable battery. 2. The continuously powered tire pressure sensor according to claim 1, wherein the charging coil can perform synchronous circular motion with the hub coil when the tire rotates. 3. The continuously powered tire pressure sensor according to claim 2, wherein the charging coil generates an induced current by cutting the magnetic field generated by the hub coil. 4. The tire pressure sensor according to claim 1, further comprising: a radio frequency transmitter; the radio frequency transmitter is connected to the controller for generating and transmitting radio frequency signals. 5. The continuous current tire pressure sensor according to claim 4, characterized in that the radio frequency transmitter is also connected with an antenna. 6. The continuously powered tire pressure sensor according to claim 1, wherein the controller is a single chip microcomputer, ARM, MCU or CPU. 7. The continuously powered tire pressure sensor according to claim 1, further comprising: a temperature sensor chip; The temperature sensor chip is connected with the controller for detecting the temperature of the gas in the tire. 8. The tire pressure sensor according to claim 1, wherein the rechargeable battery is a rechargeable lithium battery. 9. A car inner tube, characterized in that, the interior of the car inner tube is provided with the continuous current tire pressure sensor according to any one of claims 1-8. 10 . The automobile inner tube according to claim 9 , wherein the charging coil of the tire pressure sensor is tiled on the inner wall of the inner tire of the automobile near the wheel hub. 11 .