CN101837714A - Tire pressure monitoring system with dual-polarization antenna and method for receiving and processing signal thereof - Google Patents
Tire pressure monitoring system with dual-polarization antenna and method for receiving and processing signal thereof Download PDFInfo
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Abstract
The invention relates to a tire pressure monitoring system with dual-polarization antenna and a method for receiving and processing the signal thereof. The method for receiving and processing the signal of the tire pressure monitoring system comprises the following steps: (1) providing a transmitting module and a receiving module which comprises a first antenna and a second antenna, a first receiving chip, a second receiving chip and a micro control unit, wherein the first receiving chip and the second receiving chip are respectively and electrically connected with the first antenna and the second antenna, and the micro control unit is electrically connected with the first receiving chip and the second receiving chip; (2) transmitting the data with grouping serial number identification at set intervals by the transmitting module, wherein the data transmitted in each time form a complete signal; (3) receiving the data transmitted by the transmitting module through the first antenna, the second antenna, the first receiving chip and the second receiving chip, and delivering the received data to the micro control unit; (4) checking the correctness of the received data by the micro control unit; and (5) processing the effective received data with grouping serial number identification by the micro control unit. The signal is received by using two antennas and two receiving chips so as to reduce the occurrence frequency of the event that the signal can not be received due to the continuous turning of the tires in the driving process and improve the stability of the tire pressure monitoring system.
Description
Technical field
The present invention relates in particular to a kind of automobile tire pressure monitoring system and method for receiving and processing signal thereof that adopts dual polarized antenna about automobile tire pressure monitoring system.
Background technology
In the process of galloping, tire fault is that all drivers worry and the most difficult prevention the most, also is the major reason that sudden traffic accident takes place.Tire is subjected to the external force influence or the variation of weather of environment in the midium or long term of travelling, and then causes the wearing and tearing and the distortion of tire itself, and these factors all can have influence on the pressure of tire and the safety of driving.In addition, when driving inflation not at that time, the pressure that also can have influence on inside tires changes.Because the carelessness of driving is not done suitable tire maintenance or is used the wheel load meter to check the pressure condition of tire, so the contingency of tire takes place in vehicle ' in regular meeting on time.Moreover, keep normal pressure of tire can also save the consumption of oil mass.Therefore, the tire pressure of motor tire is measured for the safety of vehicle ' and important.
Under above-mentioned background, produced system for monitoring pressure in tyre TPMS (Tire PressureMomitoring System), this TPMS is mainly used in when running car tire pressure is monitored automatically, causing low tire pressure and the high tire pressure of high temperature to blow out to tire flat carries out early warning, guarantees traffic safety.In this system for monitoring pressure in tyre, antenna is the key that improves the monitoring system performance, and it is all multifactor that antenna technology relates to the geometric configuration, material, medium of antenna etc.The antenna of TPMS projector is positioned at wheel hub, thereby must considers the shielding of metal wheel hub and tire metal silk screen when designing antenna near valve nozzle, and wheel when running at high speed antenna constantly change direction, the influence of angle.
At present, a lot of TPMS receiving wires are single antenna, and this antenna only receives like-polarized signal, and wheel the TPMS antenna is constantly changed direction when running at high speed, angle causes that signal changes, the frequent obliterated data of receiving wire.According to test statistics, adopt single antenna to receive, when running, carry out acceptance test, general 500 data just have 170 loss of datas, and Loss Rate reaches 30%.
Summary of the invention
The objective of the invention is to, a kind of system for monitoring pressure in tyre with dual polarized antenna is provided, it can effectively overcome the drawback that does not receive signal in the driving process because of the polarizations change, obviously improves the signal reception of system for monitoring pressure in tyre;
Another object of the present invention is to, a kind of method for receiving and processing signal of system for monitoring pressure in tyre is provided, it adopts dual polarization, binary channel to receive the processing of data, can reduce in the driving process and rotate the situation that does not receive signal that causes, improve the stability of system for monitoring pressure in tyre because of tire is continuous.
To achieve these goals, the invention provides a kind of system for monitoring pressure in tyre with dual polarized antenna, it comprises transmitter module and receiver module, described receiver module comprises: first antenna, second antenna, first receiving chip that electrically connects with this first and second antenna respectively and second receiving chip, and with a micro-control unit of this first and second receiving chip electric connection, described first and second antenna is intersected, and its angle is more than 45 degree.
Described first and second antenna vertically is provided with in same plane.
Described first and second receiving chip is the receiving chip of freescale MC33696 model.
Further, the present invention also provides a kind of method for receiving and processing signal of system for monitoring pressure in tyre, and it may further comprise the steps:
Transmitter module and receiver module are provided, this receiver module comprise one first antenna, second antenna, first receiving chip that electrically connects with this first and second antenna respectively and second receiving chip, and with a micro-control unit of this first and second receiving chip electric connection, described first and second antenna is intersected, and its angle is more than 45 degree;
Step 2: transmitter module is launched at set intervals once has the grouping serial number recognition data, and all of each emission have the grouping serial number recognition data and form a complete signal;
Step 3: by first and second antenna, and first and second receiving chip carry out the data that binary channel receives the transmitter module emission, and the data that receive are sent into micro-control unit;
Step 4: micro-control unit carries out the correctness verification to the data that receive: if verification succeeds is then carried out next step, if this group data are then abandoned in the verification failure;
Step 5: micro-control unit is handled the valid data of the tool grouping serial number identification that receives.
In step 4, adopt the CRC method to carry out verification.
In the described step 5, the micro-control unit adopts the data of that passage that signal is stronger in two channel datas that received respectively by first and second antenna, if existing, the data of this passage lose, then the data that obtain the same packets sequence number from another channel data are used, if these group data of another channel data are also lost, loss of data that then should the period takes defeat, and waits for that the data sink of next period is handled.
In the step 1, described first and second antenna is vertical mutually to be provided with.
Beneficial effect of the present invention: system for monitoring pressure in tyre and the method for receiving and processing signal thereof with dual polarized antenna of the present invention, it carries out signal by two-way antenna, receiving chip and receives, binary channel reception data are carried out error correction and are come out, can reduce in the driving process and rotate the situation that does not receive signal that causes, improve the stability of system for monitoring pressure in tyre because of tire is continuous; In addition, after the double antenna reception, general 500 data are exactly 10 loss of datas, and Loss Rate is 2%, and reception is greatly improved.
In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provide with reference to and the explanation usefulness, be not to be used for the present invention is limited.
Description of drawings
Below in conjunction with accompanying drawing,, will make technical scheme of the present invention and other beneficial effects apparent by the specific embodiment of the present invention is described in detail.
In the accompanying drawing,
Fig. 1 has the schematic circuit diagram of receiver module in the system for monitoring pressure in tyre of dual polarized antenna for the present invention;
Fig. 2 is the schematic flow sheet of the method for receiving and processing signal of system for monitoring pressure in tyre of the present invention.
The specific embodiment
Technological means and the effect thereof taked for further setting forth the present invention are described in detail below in conjunction with the preferred embodiments of the present invention and accompanying drawing thereof.
As shown in Figure 1, the invention provides a kind of system for monitoring pressure in tyre with dual polarized antenna, it comprises transmitter module (not shown) and receiver module, and this receiver module further comprises: the first antenna E1, the second antenna E2, first receiving chip 10 that electrically connects with this first and second antenna E1, E2 respectively and second receiving chip 20, and with the micro-control unit (MCU) 30 of these first and second receiving chip 10,20 electric connections.Wherein, described first and second antenna E1, E2 are vertical mutually to be provided with, and its angle is more than 45 degree, and this is provided with and can guarantees under any circumstance, all has No. one antenna can receive signal, and does not reduce the gain of antenna.In embodiments of the present invention, described first and second antenna E1, E2 vertically are provided with in same plane, first and second receiving chip 10,20 is the receiving chip of freescale MC33696 model, this chip has reception and carries out decoding function, to the frequency shift keying (FSK:Frequency-shift keying) of two-way signal amplifies, after the mixing, demodulation, coding, send into MCU30, carry out the processing that binary channel receives data then.
Further, as shown in Figure 2, the present invention also provides a kind of method for receiving and processing signal of system for monitoring pressure in tyre, and it may further comprise the steps:
Step 1: transmitter module and receiver module are provided, this receiver module comprise one first antenna, second antenna, first receiving chip that electrically connects with this first and second antenna respectively and second receiving chip, and with a micro-control unit of this first and second receiving chip electric connection, described first and second antenna is intersected, and its angle is more than 45 degree.As a preferred embodiment of the present invention, in step 1, this first and second antenna is vertical mutually to be provided with, and this is provided with and can guarantees under any circumstance, all has No. one antenna can receive signal, and does not reduce the gain of antenna.
Step 2: transmitter module is launched at set intervals once has the grouping serial number recognition data, and all of each emission have the grouping serial number recognition data and form a complete signal.
Step 3: by first and second antenna, and first and second receiving chip carry out the data that binary channel receives the transmitter module emission, and the data that receive are sent into micro-control unit.In embodiments of the present invention, first and second receiving chip all can adopt the receiving chip of freescale MC33696 model, this chip has reception and carries out decoding function, start and be the reception program in the control unit, to the frequency shift keying (FSK:Frequency-shift keying) of two-way signal amplifies, after the mixing, demodulation, coding, send into micro-control unit, carry out the processing that binary channel receives data then.
Step 4: micro-control unit carries out the correctness verification to the data that receive: if verification succeeds is then carried out next step, if this group data are then abandoned in the verification failure.In this step, adopt Cyclic Redundancy Code effect (CRC:Cyclical Redundancy Check) method to carry out verification.In order to guarantee the correctness of data, just have to adopt the means of error detection, in many error detection means, CRC is foremost a kind of, this CRC method is to utilize the principle of division and remainder to make error detection (Error Detecting), be characterized in: error detecing capability is extremely strong, and expense is little, is easy to realize with coder and testing circuit.From its error detecing capability, it the probability of the mistake that can not find only be below 0.0047%, on performance and expense consider, all be far superior to modes such as odd even effect and arithmetic sum effect.When practical application, sending set calculates crc value and together sends to receiving device with data, and receiving device recomputates CRC to the data of receiving and compares with the CRC that receives, if two crc value differences, illustrate that then mistake appears in data communication, this time reception then is labeled as error code; If two crc values are identical, verification succeeds then, to after receiving data-signal and adding up than intensity, the operation that enters next step.
Step 5: micro-control unit is handled the valid data of the tool grouping serial number identification that receives.In this step, the micro-control unit need carry out the identification of packet sequence number to guarantee the integraty of data in the whole receiving course to the data that receive.In wireless communication procedure, data are divided into groups to transmit the correctness and the sensitivity that can improve data sink, short more grouping, the communication port time that takies is just more little, and a plurality of groupings bump also just more little with disturbed probability.But losing of integrated data will cause the imperfect of whole data in the communication process, in order to address this problem, the in esse binary channel of Physical layer is abstracted into a data flow pipeline on software, add grouping serial number at each integrated data end, receptor then can be discerned integrated data.Because receiving is two antennas, therefore exist two passages to receive data.In this step, the micro-control unit adopts the data of that passage that signal is stronger in two channel datas that received respectively by first and second antenna, if existing, the data of this passage lose, then the data that obtain the same packets sequence number from another channel data are used, if these group data of another channel data are also lost, loss of data that then should the period takes defeat, and waits for that the data sink of next period is handled.
In sum, system for monitoring pressure in tyre and method for receiving and processing signal thereof with dual polarized antenna of the present invention, it carries out signal by two-way antenna, receiving chip and receives, binary channel reception data are carried out error correction and are come out, can reduce in the driving process and rotate the situation that does not receive signal that causes, improve the stability of system for monitoring pressure in tyre because of tire is continuous; In addition, after the double antenna reception, general 500 data are exactly 10 loss of datas, and Loss Rate is 2%, and reception is greatly improved.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection domain of accompanying Claim of the present invention.
Claims (7)
1. system for monitoring pressure in tyre with dual polarized antenna, it comprises transmitter module and receiver module, it is characterized in that, described receiver module comprises: first antenna, second antenna, first receiving chip that electrically connects with this first and second antenna respectively and second receiving chip, and with a micro-control unit of this first and second receiving chip electric connection, described first and second antenna is intersected, and its angle is more than 45 degree.
2. the system for monitoring pressure in tyre with dual polarized antenna as claimed in claim 1 is characterized in that, described first and second antenna vertically is provided with in same plane.
3. the system for monitoring pressure in tyre with dual polarized antenna as claimed in claim 1 is characterized in that described first and second receiving chip is the receiving chip of freescale MC33696 model.
4. the method for receiving and processing signal of a system for monitoring pressure in tyre is characterized in that, comprises the steps:
Step 1: transmitter module and receiver module are provided, this receiver module comprise one first antenna, second antenna, first receiving chip that electrically connects with this first and second antenna respectively and second receiving chip, and with a micro-control unit of this first and second receiving chip electric connection, described first and second antenna is intersected, and its angle is more than 45 degree;
Step 2: transmitter module is launched at set intervals once has the grouping serial number recognition data, and all of each emission have the grouping serial number recognition data and form a complete signal;
Step 3: by first and second antenna, and first and second receiving chip carry out the data that binary channel receives the transmitter module emission, and the data that receive are sent into micro-control unit;
Step 4: micro-control unit carries out the correctness verification to the data that receive: if verification succeeds is then carried out next step, if this group data are then abandoned in the verification failure;
Step 5: micro-control unit is handled the valid data of the tool grouping serial number identification that receives.
5. the method for receiving and processing signal of system for monitoring pressure in tyre as claimed in claim 4 is characterized in that, in step 4, adopts the CRC method to carry out verification.
6. the method for receiving and processing signal of system for monitoring pressure in tyre as claimed in claim 4, it is characterized in that, in the described step 5, the micro-control unit adopts the data of that passage that signal is stronger in two channel datas that received respectively by first and second antenna, if existing, the data of this passage lose, then the data that obtain the same packets sequence number from another channel data are used, if these group data of another channel data are also lost, loss of data that then should the period, take defeat, wait for that the data sink of next period is handled.
7. the method for receiving and processing signal of system for monitoring pressure in tyre as claimed in claim 4 is characterized in that, in the step 1, described first and second antenna is vertical mutually to be provided with.
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Cited By (5)
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| CN106864180A (en) * | 2017-04-20 | 2017-06-20 | 北京罗耐科技发展有限公司 | One kind is blown out emergency system |
| CN106926645A (en) * | 2017-04-20 | 2017-07-07 | 北京罗耐科技发展有限公司 | One kind is blown out emergency set |
| CN107618318A (en) * | 2017-04-20 | 2018-01-23 | 北京罗耐科技发展有限公司 | One kind is blown out emergency system |
| CN108720795A (en) * | 2018-06-21 | 2018-11-02 | 重庆金山医疗器械有限公司 | A kind of data can search capsule endoscope system and the compensation method of compensation |
| CN112327184A (en) * | 2020-10-14 | 2021-02-05 | 江苏纵帆微电子有限公司 | Battery pack data transmission system and transmission method thereof |
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| CN112327184A (en) * | 2020-10-14 | 2021-02-05 | 江苏纵帆微电子有限公司 | Battery pack data transmission system and transmission method thereof |
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