轮胎压力监测中英文资料外文翻译文献
This paper discusses the use of surface acoustic wave (SAW) XXX SAW sensors。tire pressure XXX during every phase of driving。The authors present their prototypes for measuring tire pressure。the SAW sensors used。and the XXX test rides.
ning tires XXX human life while operating a road XXX Nowadays。car manufacturers try to save space and weight by not including a XXX。this can lead to XXX and the need for a tire change is still XXX punctures。it is essential to measure tire XXX 20 grams。causing high dynamic load。
A few years ago。XXX。These devices use an one port SAW delay line XXX devices that do not require a power supply or XXX。XXX.
In this paper。we discuss XXX discuss the XXX。XXX driving。ensuring the safety of drivers and passengers on the road.
Passive SAW pressure sensors operate as either a one-port delay line with XXX。In the ca
se of a delay line。the interrogator transmits a burst signal and the sensor responds with a chain of bursts。one for each XXX delay een two or more response signals is XXX measure a physical value。the parameter must be converted into a change in the sensor's surface length or surface acoustic wave velocity。The delay of the response of a reflector is determined by the。of the SAW n length on the substrate's surface and the n velocity。
When XXX。the individual delay shifts of the response XXX。XXX compressing。which is XXX。XXX the edge of a sensor fixed on the other side。In this case。the sensor is loaded to be bent due to a shift of the center of a membrane loaded by the pressure。Alternatively。XXX substrate can be used。Figure 1 illustrates these methods.
XXX pressure into shift bending。as shown in Fig.1a。To fit the SAW sensor onto the membrane。XXX。as shown in Fig.2.The cover XXX and dust。while the cavity can be filled with a gas at reference pressure。When the cavity is evacuated。absolute pressure values can be measured using simple RF burst signals。The response impulses are eval
uated in magnitude and phase。and bending the membrane due to pressure load yields a phase shift of。for instance。100 degrees for 10^4 Pascal。This allows for the measurement of air pressure in car tires with a n of approximately 10 Pascal (0.01 Bar)。which can be further ced to 50 mBar for XXX.
XXX XXX assembly。as shown in Figure 3.
In order to enable serial n。the sensor system XXX。XXX pressure chamber (Figure 2) that could be fixed to the tire。The sensor was then fixed to the rim。with the XXX (Figure 4).
XXX。XXX assembly。shown in Figure 5.has a total mass of only a few grams and can XXX high speeds.
car and the sensors XXX。XXX.
seifert
To measure the sensors。XXX in the response signal bursts。This system was controlled by a one chip microcontroller and was able to display the measurement results on an LC
D display。A photograph of the system is shown in Figure 7.
XXX in and around the city of Vienna to test our sensors and the system。The n system was connected to a car and the sensors XXX
Overall。our XXX test rides。XXX of our system and sensors.
XXX
The pressure values of a。computer were recorded and saved to a file。as shown in Figures 8 and 9.These figures XXX。In Figure 8.the left part of the graph shows how the absolute pressure value fluctuates around the mean value by the least significant bit。0.05 Bar。due to the shocks from a rugged XXX)。while the longer increase and following d of decay is due to XXX snowstorm。the XXX.

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