这各向同性辐射功率和从源一定距离的发电量在1探测器可用取决于距离以及探测器的地区元素。热释电探测器转换成电信号事件的热辐射。 This conversion takes place in three steps—the incident thermal radiation results in a change in temperature, altering the charge density on the electrodes.这种转换发生在三个步骤中,在温度变化的热辐射事件发生的结果,改变了电极上的电荷密度。 An electrical signal is generated by a preamplifier or impedance converter.一个电子信号由前置放大器或阻抗变换器。 The current generated by incident radiation is proportional to the change in temperature as well as the area of the detector elements.13 If iP represents the current flowing through the device on which an incident thermal radiation causes a temperature change where p is the pyroelectric constant and depends on the material, and As is the area of the elements of the detector. Since detection of human motion is of interest to us, pyroelectric detectors seem ideal since they respond only to changes in the heat flux that is associated with motion.目前由事件产生的辐射比例的温度变化以及探测器的elements.13地区,如果目前的IP代表通过设备上的事件造成的热辐射温度变化,其中p是热释电常数和流动取决于材料,并由于是对探测器的元素地区由于人体运动检测我们感兴趣的是。,热释电探测器似乎理想选择,因为他们只响应的热通量是与运动相关的变化。 This also helps to cancel out ambient fluctuations.这也有助于抵消环境波动。 The important characteristics of the pyroelectric detector that we used are summarized in Table 1. The power radiated by a human body is radiated isotropically and the power at the detector is a function of the area of the detecting elements as well as the distance between the source and the detector.热释电探测器,我们使用的表1总结的重要特征。由人体辐射的各向同性辐射功率和功率的探测器,是对部分地区的探测功能以及源之间的距离和探测器。 The maximum range at which the sensor will work can be determined using the noise equivalent power NEP value from Table 1.最大射程在该传感器将使用可确定从表1中的等效噪声功率新经济政策的价值。 This parameter indicates the power level at which the SNR is 1, ie, the minimum amount of power required to distinguish signal from the noise.此参数表示的权力层次上信噪比为1,即权力所需的最低金额,以区别于噪声信号。 The maximum range is determined to be about 100 m, using a detector having an NEP of 0.96 nW.最大的范围确定为100米,使用的探测器有0.96纳瓦的新经济政策。 This assumes ideal environmental conditions and noise-free circuits.这是假设的理想环境条件和无噪声电路。 The practical range would therefore be much less than this theoretical value. Another important parameter is the response time of the sensor to an input stimulus the sensor can respond to.实际范围将因此比这一理论的价值。另一个重要参数是传感器的响应时间输入刺激传感器可以回应。 The response time of this detector is about 500 ms, making it suitable for detecting human motion.这个探测器的响应时间约为500毫秒,使人体运动检测合适。 By suitably modulating the visibility of these detectors using optics and ensuring that the limits of the detector in terms of response time or in noise performance are not reached, human motion can be detected over large areas. We use a dual-element, current-mode pyroelectric detector PIR325 obtained from Glolab Corporation.14 Using the experimental setup shown in Fig.通过适当的调节,这些使用光学探测器的能见度,并确保在响应时间,或在噪音性能方面探测器的限制没有达到,人体运动可以大面积发现。我们使用了一个双元件,电流模式热释电探测器获得的Glolab Corporation.14利用实验装置如图PIR325。 2, the step response and the field of view of the sensor was obtained. 2,阶跃响应和传感器的视野得到。 An incandescent bulb was used as the heat source with a shutter to modulate the heat flux on the pyroelectric detector.白炽灯泡的被用来作为与快门调节热释电探测器上的热通量热源。搞定,啊哈,应该是全对的吧,呵呵,希望能对楼主有所帮助。我也趁此机会练练英语能力