提出了一种热释电红外探测器视场调制策略。此策略能够提高人体定位分辨率，并且不会降低探测器的探测距离。对于此策略，热释电红外探测器的视场被遮光板调制，且调制后的探测器视场相互重叠交错形成一些采样区域。为了验证此策略，制作了包含九个热释电红外探测器的人体定位节点，节点中所有调制后的探测器视场角均为36°，每一个采样区域的角度均为4°。如果受测者在一个采样区域中运动，对应的热释电红外探测器将被触发，至少需要两个人体定位节点才能实现人体定位。根据节点中热释电红外探测器的状态，能够估计人体的位置。实验中，在600 cm × 600 cm的方形区域内设置两个人体定位节点，使用最小二乘法估计理论误差，其最大理论误差为70 cm。实验中估计了八个人体位置，将所有的估计位置点连接起来形成估计路径。估计路径与预设路径十分接近。实验中的最小和最大定位误差分别为4.42 cm和16.91 cm。

A field of views of pyroelectric infrared sensors modulation strategy is proposed. The strategy can improve the human localization resolution, and it will not reduce the detection distance of pyroelectric infrared sensor. For the strategy, the field of views of pyroelectric infrared sensors are modulated by a mask. And the modulated field of views overlap and interleave with each other to form some sampling areas. In order to verify the proposed field of views modulation strategy, the human localization node which includes nine pyroelectric infrared sensors is fabricated. The modulated degree of the field of views of each pyroelectric infrared sensor is 36°. The degree of each sampling area is 4°. If the human moves in a sampling area, the corresponding pyroelectric infrared sensors will be triggered. The human position can be localized by using at least two nodes. According to the states of the pyroelectric infrared sensors, the human position can be estimated. In the experiment, two nodes are set in a 600 cm × 600 cm square area, the theoretical error is analyzed by using least square estimation. The theoretical maximum error of the two nodes human localization equipment in a 600 cm×600 cm square area is about 70 cm. Eight human positions are estimated in experiments, and the estimation route is formed by connecting all the estimated positions. The estimation route is close to the predefined route. The minimum and maximum estimation errors are about 4.42 cm and 16.91 cm respectively.