CN101572352A - Wheel hub antenna for pressure monitoring system of car tyre - Google Patents
Wheel hub antenna for pressure monitoring system of car tyre Download PDFInfo
- Publication number
- CN101572352A CN101572352A CNA2008100368963A CN200810036896A CN101572352A CN 101572352 A CN101572352 A CN 101572352A CN A2008100368963 A CNA2008100368963 A CN A2008100368963A CN 200810036896 A CN200810036896 A CN 200810036896A CN 101572352 A CN101572352 A CN 101572352A
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- China
- Prior art keywords
- wheel hub
- antenna
- valve
- metal
- tyre
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0491—Constructional details of means for attaching the control device
- B60C23/0494—Valve stem attachments positioned inside the tyre chamber
Abstract
A wheel hub antenna for a pressure monitoring system of a car tyre mainly comprises a wheel hub, a wireless tyre pressure sensor, a metal connecting needle, a signal feed-in hole and a metal valve cock component. The wheel hub antenna is characterized in that the inner side of a valve hole of the wheel hub is provided with the wireless tyre pressure sensor, the surface of the inner side is provided with the signal feed-in hole, the shell of the wireless tyre pressure sensor is provided with the metal connecting needle, one end of the metal connecting needle is connected with a high-frequency signal output end, and the other end is connected with the signal feed-in hole. The invention has the advantages that the influence to the transmission performance when the tyre is turned is reduced by using the wheel hub which is remodeled into the antenna, the sending efficiency of the antenna is high, the sending power of a sender can be effectively reduced, the service life of the wireless tyre pressure sensor is prolonged, and the working performance of the pressure monitoring system of the car tyre is improved.
Description
Technical field
The present invention relates to a kind of vehicle tyre pressure monitoring system, particularly a kind of wheel hub antenna that is used for pressure monitoring system of car tyre.
Background technology
Adopt metal valve cocks or other small size antenna transmitting antenna at present in the radio tire pressure transducer that uses as the radio tire pressure transducer more.And the size of valve cock antenna is less than 5 centimetres, and much smaller than the operation wavelength of automotive tire pressure surveillance (TPMS), TPMS is the english abbreviation form of " Tire Pressure MonitoringSystem ", i.e. the automotive tire pressure surveillance.And the structure of wheel metal wheel hub and vehicle body can have a strong impact on the radiance of valve cock antenna, particularly is in motion and wheel when being in rotary state when automobile, and high-frequency signal radiance and space transmission performance can reduce greatly.
In order to improve the effect of vehicle tyre pressure monitoring system, people are applied to TPMS with many methods and improve its vehicle-mounted performance, but these method great majority focus on the signal condition of radio tire pressure transducer, temperature-compensating, software controlling strategies, the application of TPMS radio tire pressure sensor antenna in actual environment seldom considered in the influence of the aspects such as thermodynamic behaviour of communication protocol and wireless senser antenna encapsulating material.
Summary of the invention
In order to overcome the problem of radio tire pressure sensor antenna radiance and electromagnetic wave propagation decreased performance in vehicle-mounted use, the objective of the invention is at the defective that exists in the prior art, a kind of wheel hub antenna that is used for pressure monitoring system of car tyre is provided.Wheel hub antenna of the present invention can be when automobile be kept in motion, and the accuracy of its signal radiation efficient and data frame transfer all obtains very big improvement.
The present invention mainly comprises: wheel hub, radio tire pressure transducer, metal connection pin and signal feed-in hole, metal valve assembly, the radio tire pressure transducer is equipped with in the valve port inboard that it is characterized in that described wheel hub, and the radio tire pressure transducer comprises signal processing circuit, pressure sensor, temperature sensor, acceleration transducer, signal condition module, low frequency receiving interface, high frequency transmission circuit and high-frequency signal output.Inner surface is provided with signal feed-in hole, metal is housed on the radio tire pressure sensor outer housing connects pin, one end of this metal connection pin is connected with the high-frequency signal output on the sensor circuit board, the other end is connected with signal feed-in hole, signal feed-in hole is a hemispherical groove, the end that metal connects pin is outstanding hemisphere, and interior the coincideing of hemispherical groove that this hemisphere embeds signal feed-in hole connects.Metal connects pin provides the interface of radiofrequency signal from radio tire pressure transducer high frequency transmission circuit feed-in wheel hub antenna, thereby realizes that radiofrequency signal is effectively to space radiation.
Wheel hub antenna is set up the 3 D electromagnetic simulation model, utilize parameters such as the impedance of this model emulation wheel hub antenna and gain, and determine that with what the parameter that obtains was applied to the design of radio frequency matching network, antenna and transmitting power size the design for TPMS high frequency receiving antenna and system simultaneously provides reference.Advantage of the present invention is to utilize the bigger advantage of hub size to be adapted as antenna, the operation wavelength of itself and automotive tire pressure surveillance TPMS can be compared, when reducing wheel to the influence of transmission performance, antenna emission effciency height, can effectively reduce the transmitting power of transmitter, prolong the useful life of radio tire pressure transducer, promote the service behaviour of TPMS.
Description of drawings
Fig. 1 wheel hub antenna composition diagram of the present invention;
Fig. 2 structural representation of the present invention;
Fig. 3 wheel hub antenna and single-antenna power directional diagram;
Fig. 4 wheel hub antenna and single antenna received power figure.
1 metal connects pin, 2 signal feed-in holes, 10 wheel hubs, 11 radio tire pressure transducers, 12 tyre valves, 13 rubber washers, 14 rubber washers, 15 metal circular packing rings, 16 screws, 17 nuts, 18 tire valve caps
Embodiment
Further specify embodiments of the invention below in conjunction with accompanying drawing:
Referring to Fig. 1, referring to Fig. 2, wheel hub antenna comprises that wheel hub 10, radio tire pressure transducer 11, metal connect pin 1, signal feed-in hole 2, metal valve assembly.Radio tire pressure transducer 11 is installed in the valve cock position of wheel hub 10.Radiofrequency signal in the radio tire pressure transducer 11 is fed into the metal that is inlaid on radio tire pressure transducer 11 shells through the microstrip line on the high-frequency signal output and connects pin 1 after amplifying via the high-frequency emission module and modulating.Metal connects pin 1 one ends and is connected with radio tire pressure transducer 11 shells, and the other end is connected with signal feed-in hole 2 on the wheel hub 10.Signal feed-in hole 2 is a hemispherical groove, and metal connects pin 1 this terminal hemisphere for giving prominence to, and this hemisphere just coincide with hemispherical groove and is connected.Therefore metal connects pin 1 provides radiofrequency signal to pass to the path of wheel hub 10 from radio tire pressure transducer 11, and then realizes that radiofrequency signal is to space radiation.
The metal valve assembly comprises tyre valve 12, metal circular packing ring 15, rubber washer 13,14, screw 16, nut 17 and tire valve cap 18, tyre valve embeds in the valve port of wheel hub, be fixed on the valve port of wheel hub by nut 17, the inside and outside both sides of valve port are lined with rubber washer 13, rubber washer 14 respectively, be with metal circular packing ring 15 on the rubber washer 14 of the outside, tire valve cap 18 screws in tyre valve 12, and screw 16 is installed in the inboard of tyre valve 12.
Wheel hub adopts aluminum alloy materials matter to make, and signal feed-in hole surface carries out nickel plating or chromium plating or carries out electric conductive oxidation and handle, and can guarantee conductive effect, can prevent the oxidation in the wheel hub use again.
Radio tire pressure transducer 11 comprises signal processing circuit, pressure sensor, temperature sensor, acceleration transducer, signal condition module, low frequency receiving interface, high frequency transmission circuit and high-frequency signal output.Pressure sensor is a silicon resistance formula pressure sensor, and its resistance bridge is output as differential voltage signal.Signal processing circuit is proofreaied and correct and temperature-compensating the output signal of pressure sensor 4, make its precision in operating temperature range (40～125 ℃) internal pressure monitoring be controlled at ± 2%FSO in; Integrated temperature sensor and battery voltage sensor are used to monitor temperature and cell voltage in the tire in the signal processing circuit.The baseband digital signal of the 9.6Kbit/s of signal processing center output is sent to the radiofrequency signal that radio circuit is modulated into 315MHz/433MHz, radiate via high frequency antenna.Acceleration transducer is used to monitor the motion state of automobile, when the speed of a motor vehicle during more than or equal to 24km/h, radio tire pressure transducer 11 is in the operation mode of operation, detects one time pressure and temperature per 4 seconds, detected primary cell voltage in per 30 minutes, per 2 minutes emission one secondary data; When the speed of a motor vehicle during less than 24km/h, radio tire pressure transducer 11 is in quiescent mode of operation, and this moment still can detected pressures and temperature, and carries out the alarm under the abnormal conditions, and software controlling strategies can be more concise, efficient and energy-conservation.When tire pressure was lower than alarming threshold, radio tire pressure transducer 11 was launched the pressure and temperature data in the several seconds.Low-frequency antenna is used to receive the low frequency signal of outside 125KHz, and radio tire pressure transducer 11 was in the energy saver mode of super low-power consumption before entrucking, and special equipment can pass through low frequency signal wake on wireless tyre pressure sensor, thereby removes power save mode.In the entrucking process, low-frequency antenna is used for the location of front and back wheel, is confirmed to be still back tire fault of front tyre to make things convenient for the driver when alarming.
Referring to Fig. 3, the wheel hub antenna characteristic keeps omnidirectional substantially, and the single antenna direction has very big-difference in the radianting capacity of different directions, and this shows that vehicle body, wheel hub are very big to the beam-shaping effect of antenna.
Referring to Fig. 4, radio tire pressure transducer radio-frequency power is made as 3dBm, the frequency shift keying carrier signal of emission 433.92MHz; Receiver is positioned at the fascia top position, and the antenna of receiver adopts 1/4 wavelength simple oscialltor antenna, after connect frequency spectrograph; The received power of 12 points of rotating-wheel record is carried out 2 kinds of contrast tests; Radio tire pressure transducer 11 adopts wheel hub antenna coupling, the power that the recorder machine receives; The radio tire pressure transducer adopts static single antenna coupling, the power that the recorder machine receives.Two kinds of test results show the radio tire pressure transducer that adopts the wheel hub antenna coupling, and its through-put power has increased by 20～30dB.
Claims (4)
1. wheel hub antenna that is used for pressure monitoring system of car tyre, mainly comprise: wheel hub, the radio tire pressure transducer, metal connects pin and signal feed-in hole, the metal valve assembly, the radio tire pressure transducer is equipped with in the valve port inboard that it is characterized in that described wheel hub, inner surface is provided with signal feed-in hole, metal is housed on the radio tire pressure sensor outer housing connects pin, one end of this metal connection pin is connected with the high-frequency signal output on the sensor circuit board, the other end is connected with signal feed-in hole, signal feed-in hole is a hemispherical groove, the end that metal connects pin is outstanding hemisphere, and interior the coincideing of hemispherical groove that this hemisphere embeds signal feed-in hole connects.
2. the wheel hub antenna that is used for pressure monitoring system of car tyre according to claim 1 is characterized in that described radio tire pressure transducer comprises signal processing circuit, pressure sensor, temperature sensor, acceleration transducer, signal condition module, low frequency receiving interface, high frequency transmission circuit and high-frequency signal output.
3. the wheel hub antenna that is used for pressure monitoring system of car tyre according to claim 1, it is characterized in that described metal valve assembly comprises tyre valve, metal circular packing ring, rubber washer, screw, nut and tire valve cap, tyre valve embeds in the valve port of wheel hub, be fixed on the valve port of wheel hub by nut, the inside and outside both sides of valve port are lined with rubber washer respectively, be with the metal circular packing ring on the rubber washer of the outside, the tire valve cap screws in tyre valve, and screw is installed in the inboard of tyre valve.
4. the wheel hub antenna that is used for pressure monitoring system of car tyre according to claim 1 is characterized in that described wheel hub adopts aluminum alloy materials matter to make, and signal feed-in hole surface nickel plating or chromium plating or electric conductive oxidation are handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100368963A CN101572352A (en) | 2008-04-30 | 2008-04-30 | Wheel hub antenna for pressure monitoring system of car tyre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100368963A CN101572352A (en) | 2008-04-30 | 2008-04-30 | Wheel hub antenna for pressure monitoring system of car tyre |
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| CN101572352A true CN101572352A (en) | 2009-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100368963A Pending CN101572352A (en) | 2008-04-30 | 2008-04-30 | Wheel hub antenna for pressure monitoring system of car tyre |
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| CN (1) | CN101572352A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102555697A (en) * | 2010-12-17 | 2012-07-11 | 联创汽车电子有限公司 | Method of positioning tire pressure sensors in automobile tire air pressure monitoring system |
| CN103786534A (en) * | 2012-10-30 | 2014-05-14 | 蓝宝汽车电子（扬州）有限公司 | Built-in auto tyre pressure detection system |
| CN107512142A (en) * | 2017-09-05 | 2017-12-26 | 矽力杰半导体技术(杭州)有限公司 | Code writing station, tire pressure monitoring unit and control method |
| CN108574500A (en) * | 2017-03-09 | 2018-09-25 | 深圳市航盛电子股份有限公司 | The matching process of tire pressure monitoring sensor radio-frequency antenna based on valve inside antenna |
| CN108698457A (en) * | 2016-03-04 | 2018-10-23 | 大陆汽车有限公司 | Wheel unit, for the system and method from wheel unit transmission data |
| CN111497531A (en) * | 2019-01-04 | 2020-08-07 | 益力半导体股份有限公司 | Rim punching type monitoring structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2808625Y (en) * | 2005-04-26 | 2006-08-23 | 重庆汉邦网络技术有限公司 | Tyre pressure and temperature detection and transmitting device |
| CN101025848A (en) * | 2007-01-30 | 2007-08-29 | 华南理工大学 | Wireless data transmission anti-collision method for automobile brake perfrmance monitoring system |
-
2008
- 2008-04-30 CN CNA2008100368963A patent/CN101572352A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2808625Y (en) * | 2005-04-26 | 2006-08-23 | 重庆汉邦网络技术有限公司 | Tyre pressure and temperature detection and transmitting device |
| CN101025848A (en) * | 2007-01-30 | 2007-08-29 | 华南理工大学 | Wireless data transmission anti-collision method for automobile brake perfrmance monitoring system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102555697A (en) * | 2010-12-17 | 2012-07-11 | 联创汽车电子有限公司 | Method of positioning tire pressure sensors in automobile tire air pressure monitoring system |
| CN103786534A (en) * | 2012-10-30 | 2014-05-14 | 蓝宝汽车电子（扬州）有限公司 | Built-in auto tyre pressure detection system |
| CN108698457A (en) * | 2016-03-04 | 2018-10-23 | 大陆汽车有限公司 | Wheel unit, for the system and method from wheel unit transmission data |
| CN108698457B (en) * | 2016-03-04 | 2020-10-09 | 大陆汽车有限公司 | Wheel unit, system and method for transmitting data from a wheel unit |
| CN108574500A (en) * | 2017-03-09 | 2018-09-25 | 深圳市航盛电子股份有限公司 | The matching process of tire pressure monitoring sensor radio-frequency antenna based on valve inside antenna |
| CN108574500B (en) * | 2017-03-09 | 2020-08-28 | 深圳市航盛电子股份有限公司 | Matching method of tire pressure monitoring sensor radio frequency antenna based on valve core antenna |
| CN107512142A (en) * | 2017-09-05 | 2017-12-26 | 矽力杰半导体技术(杭州)有限公司 | Code writing station, tire pressure monitoring unit and control method |
| CN111497531A (en) * | 2019-01-04 | 2020-08-07 | 益力半导体股份有限公司 | Rim punching type monitoring structure |
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Application publication date: 20091104 |