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发明公开
CN110174126A 接近传感器 无效 - 撤回

接近传感器
摘要：
本发明提供一种可减少周期性噪声的影响的接近传感器。本发明的一实施例的接近传感器(100)是利用磁场对检测体(200)进行检测，接近传感器(100)包括：检测线圈(11)，产生磁场；励磁电路(20)，朝检测线圈(11)中反复供给脉冲状的励磁电流；检测电路(30)，根据在励磁电流的供给被阻断后的规定期间内在检测线圈(11)的两端产生的电压，对检测体(200)进行检测；以及控制电路(40)，以阻断朝检测线圈(11)中的励磁电流的供给的时机变成非周期性的方式控制励磁电路(20)。
摘要（英）：

A proximity sensor (100) capable of reducing the influence of periodic noise is provided. A proximity sensor (100) according to an embodiment of the disclosure detects a detection object (200) using amagnetic field, and includes a detection coil (11) for generating the magnetic field, an excitation circuit (20) for repeatedly supplying a pulsed excitation current to the detection coil (11), a detection circuit (30) for detecting the detection object (200) based on a voltage generated across both ends of the detection coil (11) during a predetermined period after the supply of the excitation current is cut off, and a control circuit (40) for controlling the excitation circuit (20) so that a timing of cutting off the supply of the excitation current to the detection coil (11) becomes aperiodic.

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