英语阅读：利用无线电波探测压力的微妙变化.docxVIP

Stanford engineers have invented a wireless1 pressure sensor2 that has already been used to measure brain pressure in lab mice with brain injuries. The underlying3 technology has such broad potential that it could one day be used to create skin-like materials that can sense pressure, leading to prosthetic devices with the electronic equivalent of a sense of touch.A nine-member research team led by Chemical Engineering Professor ZhenanBao detailed4 two medical applications of this technology in Nature Communications.In one simple demonstration5 they used this wireless pressure sensor to read a team members pulse without touching6 him.In a more complex application, they used this wireless device to monitor the pressure inside the skull7 of a lab mouse, an achievement that could one day lead to better ways to treat human brain injuries.Baos wireless sensor is made by placing a thin layer of specially8 designed rubber between two strips of copper9. The copper strips act like radio antennas10. The rubber serves as an insulator11.The technology involves beaming radio waves through this simple antenna-and-rubber sandwich. When the device comes under pressure, the copper antennas squeeze the rubber insulator and move infinitesimally closer together.That tiny change in proximity12 alters the electrical characteristics of the device. Radio waves passing through the two antennas slow down in terms of frequency. When pressure is relaxed, the copper antennas move apart and the radio waves accelerate in frequency.The engineers proved that this effect was measurable, giving them a way to gauge13 the pressure exerted on the device by tracking the frequency of radio waves passing through the device.词汇表：1 wireless adj.无线的；n.无线电参考例句：There are a lot of wireless links in a radio.收音机里有许多无线电线路。Wireless messages tell us that the ship was sinking.无线电报告知我们那艘船正在下沉。2 sensor n.传感器，探测设备，感觉器（官）参考例句：The temperature sensor is enclosed in a protective well.温度传感器密封在保护套管中。He plugged the sensor