Payload Control System (PCS) 2.X Caterpillar


Sensors

Usage:

972G 1EW
传感器为有效载荷系统的电子控制模块 ECM 提供信息。 此信息是提升油缸内油压和提升臂位置等变化情况的相关说明。 ECM 认可来自传感器的两种信号。

  • 频率信号。 传感器会产生一个AC信号。 频率(Hz)随条件变化而变化。

  • 脉冲宽度调制 PWM。 该传感器产生数字信号。 占空比随条件变化而变化。 这个信号的频率恒定。

频率传感器

频率传感器产生信号。 此信号为正弦波信号或方波信号。 频率随条件变化而变化。

提升油缸的油压传感器




图 1g00582059

提升油缸的油压传感器

(1) 示意图符号。 (2) 传感器。




图 2g01358940

系列 H 提升油缸的油压传感器

油压传感器 (2) 对提升油缸内的压力做出反应。 此传感器从机器的电气系统获得工作电源。 传感器向 ECM 发送方波信号。 随着提升油缸内油压的变化,信号的频率发生变化。 ECM 通过测量频率确定提升油缸内的压力。 传感器不需要标定。

脉冲宽度调制 PWM 传感器




图 3g00582060

脉冲宽度调制信号




图 4g00582064

典型的 PWM 传感器示意图

脉冲宽度调制 PWM 传感器产生数字信号。 信号的占空比随条件变化而变化。 频率保持不变。

提升位置传感器




图 5g00582067

提升位置传感器

(1) 示意图符号。 (2) 传感器。




图 6g00983934

提升位置传感器

(1) 示意图符号。 (2) 传感器。

提升位置传感器为 ECM 的输入。 此位置传感器安装在提升臂的枢轴上。 此传感器为脉冲宽度调制 PWM 传感器。 它以机器电压为工作电源。 此信号的频率(Hz)为 500 Hz。 此频率保持恒定。 该传感器连续产生 PWM 信号。 传感器的占空比与提升臂的角度成正比。 控制装置负责接收 PWM 信号和测量占空比。 从而确定提升臂的角度。

注: 提升位置传感器是必须标定的唯一传感器。

参考关于更多信息,请参阅维修手册, SENR6614, "位置传感器(提升连杆)- 调整"。

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