CN104015576A - Bluetooth tire pressure sender antenna - Google Patents
Bluetooth tire pressure sender antenna Download PDFInfo
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- CN104015576A CN104015576A CN201410242687.XA CN201410242687A CN104015576A CN 104015576 A CN104015576 A CN 104015576A CN 201410242687 A CN201410242687 A CN 201410242687A CN 104015576 A CN104015576 A CN 104015576A
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- antenna
- radio frequency
- tire pressure
- bluetooth
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Abstract
The invention provides a Bluetooth tire pressure sender antenna. The Bluetooth tire pressure sender antenna comprises an inflating valve and an antenna optimizing circuit, wherein the inflating valve is used as an antenna carrier of a Bluetooth tire pressure sender; the antenna optimizing circuit is arranged between the inflating valve and a chip radio frequency signal input end, and used for normally transmitting a radio frequency signal received by the inflating valve to the chip radio frequency signal input end. According to the Bluetooth tire pressure sender antenna, an existing structure of the tire pressure sender is used as a working carrier of a Bluetooth antenna, and through an additional optimizing circuit of a circuit, the Bluetooth tire pressure sender realizes a Bluetooth communication link in an optimal manner under the condition of not increasing the antenna cost, and a possible abnormal condition is also effectively avoided.
Description
Technical field
The invention belongs to electronic circuit technology field, relate to a kind of tire pressure transmitter antenna, particularly relate to a kind of bluetooth tire pressure transmitter antenna.
Background technology
Tire Pressure Monitor System (TPMS) is a kind of can automatically detection air pressure of automobile tire, temperature, and the forewarn system that abnormal tyre situation is reported to the police.TPMS system can be divided into two kinds of indirect type and direct-type.Indirect type is that the wheel speed sensors by automobile ABS system carrys out the rotating speed difference between comparison wheel, to reach the object that monitors tire pressure.Direct-type utilization is arranged on the air pressure that each pressure sensor of taking turns tyre cavity is directly measured tire, and is transmitted on the receptor that is arranged on operator platform by wireless-modulated.The current following two schemes of the more employing of direct-type TPMS transmitter module: a kind of is battery+micro controller system+sensor+radio frequency chip, and another kind is sensor+radio frequency chip of battery+inner integrated MCU (microcontroller).Before a kind of scheme because integrated level is low, volume and power consumption large and by market, eliminated gradually the product design form that rear a kind of scheme is main flow on Vehicles Collected from Market.Traditional tire pressure transmitter is owing to being operated in 433Mhz frequency, and its radiofrequency signal wavelength is oversize, in the design of tire pressure transmitter, can only adopt large-sized spring antenna or longer copper cash spiral winding mode to realize final Antenna Design.
The radiofrequency signal wavelength of traditional tire pressure transmitter is approximately 6 times of left and right of bluetooth 2.4Ghz.The frequency of operation of bluetooth low-power consumption communications protocol is at 2.4Ghz, mutual for guaranteeing the communication of data, needs a special bluetooth antenna element, guarantees the transmission stabilization efficiency of data.At present in traditional blue tooth products design, generally can according to mechanism size and PCB bulk different situations, select glue rod shell fragment antenna, paster Bluetooth antenna or PCB microstrip line etc. to apply.But this application can increase the cost of tire pressure transmitter undoubtedly.
Summary of the invention
The shortcoming of prior art, the object of the present invention is to provide a kind of bluetooth tire pressure transmitter antenna in view of the above, for solving existing tire pressure transmitter antenna size greatly and the problem of increase cost.
For achieving the above object and other relevant objects, the invention provides a kind of bluetooth tire pressure transmitter antenna, described bluetooth tire pressure transmitter antenna comprises: tire tube valve, as the antenna carrier of described bluetooth tire pressure transmitter; Antenna optimized circuit, is arranged between described tire tube valve and chip radio-frequency (RF) signal input end, for the radiofrequency signal normal transmission that guarantees to receive by described tire tube valve to chip radio-frequency (RF) signal input end.
Preferably, described antenna optimized circuit comprises electrostatic protection device, direct current (DC) isolating device, and radio frequency antenna matching circuit; Described electrostatic protection device is electrically connected to the feedback point that contacts of described tire tube valve, for avoiding electrostatic signal to enter into described chip radio-frequency (RF) signal input end; Described direct current (DC) isolating device is electrically connected to described electrostatic protection device and radio frequency antenna matching circuit respectively, for avoiding external high voltage direct current (DC) to be circulated into described chip radio-frequency (RF) signal input end by tire tube valve; Described radio frequency antenna matching circuit is electrically connected to described chip radio-frequency (RF) signal input end by impedance line, for optimizing antenna directional pattern.
Preferably, described electrostatic protection device comprises esd protection device; One end of described esd protection device is electrically connected to the feedback point that contacts of described tire tube valve, other end ground connection.
Preferably, described direct current (DC) isolating device comprises isolation capacitance; One end of described isolation capacitance is electrically connected to the feedback point that contacts of described tire tube valve, and the other end is electrically connected to described radio frequency antenna matching circuit.
Preferably, described radio frequency antenna matching circuit comprises radio frequency inductive, the first radio frequency electric capacity and the second radio frequency electric capacity; One end of described radio frequency inductive is electrically connected to described direct current (DC) isolating device, and the other end is electrically connected to described chip radio-frequency (RF) signal input end; Described first one end of radio frequency electric capacity and one end of described radio frequency inductive are electrically connected to, other end ground connection; Described second one end of radio frequency electric capacity and the other end of described radio frequency inductive are electrically connected to, other end ground connection.
As mentioned above, bluetooth tire pressure transmitter antenna of the present invention, has following beneficial effect:
The present invention utilizes on tire pressure transmitter existing tire tube valve as the working material of Bluetooth antenna, simultaneously by optimized circuit additional on circuit, allow bluetooth tire pressure transmitter in the situation that not increasing antenna cost, in best mode, realize the communication link of bluetooth, also well avoided possible abnormal condition to introduce simultaneously.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of bluetooth tire pressure transmitter antenna of the present invention.
Fig. 2 is a kind of particular circuit configurations schematic diagram of bluetooth tire pressure transmitter antenna of the present invention.
Element numbers explanation
100 bluetooth tire pressure transmitter antenna
110 tire tube valves
120 antenna optimized circuits
121 electrostatic protection devices
122 direct current (DC) isolating devices
123 radio frequency antenna matching circuit
124 impedance lines
130 chip radio-frequency (RF) signal input end
The specific embodiment
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification sheets.The present invention can also be implemented or be applied by the other different specific embodiment, and the every details in this specification sheets also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
Refer to accompanying drawing.It should be noted that, the diagram providing in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy and only show with assembly relevant in the present invention in graphic but not component count, shape and size drafting while implementing according to reality, during its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
Embodiment
The invention provides a kind of bluetooth tire pressure transmitter antenna, as shown in Figure 1, described bluetooth tire pressure transmitter antenna 100 comprises: tire tube valve 110, antenna optimized circuit 120.
Described tire tube valve 110 is as the antenna carrier of described bluetooth tire pressure transmitter.
Antenna optimized circuit 120 is arranged between described tire tube valve 110 and chip radio-frequency (RF) signal input end 130, for the radiofrequency signal normal transmission that guarantees to receive by described tire tube valve to chip radio-frequency (RF) signal input end.
Bluetooth tire pressure transmitter antenna shown in Fig. 1 is applied to built-in tire pressure transmitter; generally be arranged on inside tires; by the tire tube valve carrying, be fixed on tire wheel hub; the concrete structure of its antenna optimized circuit can be referring to Fig. 2, but the protection domain of antenna optimized circuit 120 of the present invention includes but not limited to the circuit structure shown in Fig. 2.Every optimized circuit according to principle design of the present invention is all included in protection scope of the present invention.
Further, as shown in Figure 2, described antenna optimized circuit 120 comprises electrostatic protection device 121, direct current (DC) isolating device 122, and radio frequency antenna matching circuit 123.
Described electrostatic protection device 121 is electrically connected to the feedback point that contacts of described tire tube valve 110, for avoiding electrostatic signal to enter into described chip radio-frequency (RF) signal input end.Further, described electrostatic protection device 121 comprises esd protection device ESD1; One end of described esd protection device ESD1 is electrically connected to the feedback point that contacts of described tire tube valve, other end ground connection.The electrostatic defending that ESD1 goes out for antenna feed point (being the contact feedback point of tire tube valve 110), avoids electrostatic signal to enter into chip radio frequency input pin (being chip radio-frequency (RF) signal input end), breaks chip.Electrostatic protection device 121 of the present invention includes but not limited to esd protection device, everyly can realize the device of electrostatic protection or the protection domain that circuit all belongs to electrostatic protection device 121 of the present invention.
Described direct current (DC) isolating device 122 is electrically connected to described electrostatic protection device 121 and radio frequency antenna matching circuit 123 respectively, for avoiding external high voltage direct current (DC) to be circulated into described chip radio-frequency (RF) signal input end by tire tube valve.Further, described direct current (DC) isolating device 122 comprises isolation capacitance C1; One end of described isolation capacitance C1 is electrically connected to the feedback point that contacts of described tire tube valve, and the other end is electrically connected to described radio frequency antenna matching circuit.Isolation capacitance C1, for direct current (DC) isolation, avoids external high voltage direct current (DC) to be circulated into chip radio frequency input pin, defective chip by tire tube valve.Direct current (DC) isolating device 122 of the present invention includes but not limited to isolation capacitance C1, everyly can realize the device of direct current (DC) isolation or the protection domain that circuit all belongs to direct current (DC) isolating device 122 of the present invention.
Described radio frequency antenna matching circuit 123 is electrically connected to described chip radio-frequency (RF) signal input end 130 by impedance line 124, for optimizing antenna directional pattern.Further, described radio frequency antenna matching circuit 123 comprises radio frequency inductive L1, the first radio frequency electric capacity C2 and the second radio frequency electric capacity C3; One end of described radio frequency inductive L1 is electrically connected to described direct current (DC) isolating device 122, and the other end is electrically connected to described chip radio-frequency (RF) signal input end 130; One end of described the first radio frequency electric capacity C2 is electrically connected to one end of described radio frequency inductive L1, other end ground connection; One end of described the second radio frequency electric capacity C3 is electrically connected to the other end of described radio frequency inductive L1, other end ground connection.L1, C2, and C3 is the antenna-matching circuit that the present embodiment is enumerated, for antenna directional pattern optimization.What the present embodiment middle impedance line 124 adopted is 50 ohmage lines, guarantees the impedance continuity of antenna traces, the signal attenuation of avoiding impedance to jump and cause.The large I of resistance of impedance line 124 is selected according to practical application.Radio frequency antenna matching circuit 123 of the present invention includes but not limited to radio frequency inductive L1, the first radio frequency electric capacity C2 and the second radio frequency electric capacity C3, everyly can realize the device of radio frequency antenna matching or the protection domain that circuit all belongs to radio frequency antenna matching circuit 123 of the present invention.
The present invention mainly coordinates the existing structure mold of bluetooth tire pressure transmitter, based on the short advantage of Bluetooth signal wavelength, utilize on transmitter existing metal tire tube valve as the working material of Bluetooth antenna, simultaneously by special circuit additional on circuit (being antenna optimized circuit), both realized the laser propagation effect of Bluetooth antenna, do not affect again the normal function of original tire tube valve, for bluetooth tire pressure transmitter provides stable, a failure-free physical communication link, while having guaranteed transmitter work, its broadcast data, handshake authentication, interconnected operation can be effectively executed.
The present invention utilizes on tire pressure transmitter existing tire tube valve as the working material of Bluetooth antenna, simultaneously by optimized circuit additional on circuit, allow bluetooth tire pressure transmitter in the situation that not increasing antenna cost, in best mode, realize the communication link of bluetooth, also well avoided possible abnormal condition to introduce simultaneously.
Major advantage of the present invention is as follows:
1, without adding special Bluetooth antenna, save hardware cost and assembly cost.
2, by electrostatic protection device, having avoided possibility static to introduce the chip causing damages.
3,, by alternating current-direct current isolated component (direct current (DC) isolating device), avoided the chip that possible high voltage induction causes to damage.
4, utilize existing large-area metal carrier, realized the optimum working efficiency of Bluetooth antenna, and realized stable communication link effect.
In sum, the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (5)
1. a bluetooth tire pressure transmitter antenna, is characterized in that, described bluetooth tire pressure transmitter antenna comprises:
Tire tube valve, as the antenna carrier of described bluetooth tire pressure transmitter;
Antenna optimized circuit, is arranged between described tire tube valve and chip radio-frequency (RF) signal input end, for the radiofrequency signal normal transmission that guarantees to receive by described tire tube valve to chip radio-frequency (RF) signal input end.
2. bluetooth tire pressure transmitter antenna according to claim 1, is characterized in that: described antenna optimized circuit comprises electrostatic protection device direct current (DC) isolating device, and radio frequency antenna matching circuit; Described electrostatic protection device is electrically connected to the feedback point that contacts of described tire tube valve, for avoiding electrostatic signal to enter into described chip radio-frequency (RF) signal input end; Described direct current (DC) isolating device is electrically connected to described electrostatic protection device and radio frequency antenna matching circuit respectively, for avoiding external high voltage direct current (DC) to be circulated into described chip radio-frequency (RF) signal input end by tire tube valve; Described radio frequency antenna matching circuit is electrically connected to described chip radio-frequency (RF) signal input end by impedance line, for optimizing antenna directional pattern.
3. bluetooth tire pressure transmitter antenna according to claim 2, is characterized in that: described electrostatic protection device comprises esd protection device; One end of described esd protection device is electrically connected to the feedback point that contacts of described tire tube valve, other end ground connection.
4. bluetooth tire pressure transmitter antenna according to claim 2, is characterized in that: described direct current (DC) isolating device comprises isolation capacitance; One end of described isolation capacitance is electrically connected to the feedback point that contacts of described tire tube valve, and the other end is electrically connected to described radio frequency antenna matching circuit.
5. bluetooth tire pressure transmitter antenna according to claim 2, is characterized in that: described radio frequency antenna matching circuit comprises radio frequency inductive, the first radio frequency electric capacity and the second radio frequency electric capacity; One end of described radio frequency inductive is electrically connected to described direct current (DC) isolating device, and the other end is electrically connected to described chip radio-frequency (RF) signal input end; Described first one end of radio frequency electric capacity and one end of described radio frequency inductive are electrically connected to, other end ground connection; Described second one end of radio frequency electric capacity and the other end of described radio frequency inductive are electrically connected to, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410242687.XA CN104015576B (en) | 2014-06-03 | 2014-06-03 | Bluetooth tire pressure transmitter antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410242687.XA CN104015576B (en) | 2014-06-03 | 2014-06-03 | Bluetooth tire pressure transmitter antenna |
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| CN104015576A true CN104015576A (en) | 2014-09-03 |
| CN104015576B CN104015576B (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410242687.XA Active CN104015576B (en) | 2014-06-03 | 2014-06-03 | Bluetooth tire pressure transmitter antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US20190001764A1 (en) * | 2017-06-30 | 2019-01-03 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Tire pressure monitoring unit |
| CN112781780A (en) * | 2020-12-30 | 2021-05-11 | 上海文襄汽车传感器有限公司 | Automobile oil pressure sensor |
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| CN202749511U (en) * | 2012-06-04 | 2013-02-20 | 北京兴科迪科技有限公司 | Dynamic micro-strip antenna applied to TPMS (Tyre Pressure Monitoring System) emitter |
| CN203920285U (en) * | 2014-06-03 | 2014-11-05 | 上海纵目科技有限公司 | Bluetooth tire pressure transmitter antenna |
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2014
- 2014-06-03 CN CN201410242687.XA patent/CN104015576B/en active Active
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| CN2758993Y (en) * | 2004-12-27 | 2006-02-15 | 苏州沃野系统控制技术有限公司 | Transmitting antenna for tyre alarm |
| CN101389497A (en) * | 2006-01-23 | 2009-03-18 | 施拉德尔电子学有限公司 | Tire monitor system having tire valve antenna |
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| CN102404958A (en) * | 2010-09-16 | 2012-04-04 | Aq株式会社 | Mobile communication terminal casing equipped with internal antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| US20190001764A1 (en) * | 2017-06-30 | 2019-01-03 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Tire pressure monitoring unit |
| CN112781780A (en) * | 2020-12-30 | 2021-05-11 | 上海文襄汽车传感器有限公司 | Automobile oil pressure sensor |
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| Publication number | Publication date |
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| CN104015576B (en) | 2017-04-05 |
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Address after: 201201 room B, block, No. 977, Feng Lu, Pudong New Area, Shanghai, China Patentee after: Zongmu Technology (Shanghai) Limited by Share Ltd Address before: 201201 room B, block, No. 977, Feng Lu, Pudong New Area, Shanghai, China Patentee before: Shanghai Zongmu Technology Co., Ltd. |
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