电位器

介绍

电位器是一种模拟传感器，用于测量旋转轴的角位置。它输出的电压与其位置成正比。

根据电位器型号的不同，其可检测的旋转量也不同：

• 电位器 – 最高可达 250 度

• 电位器 V2 – 330 度（连续）

电位器	电位器 V2

This page uses potentiometer_a as the example Potentiometer name. Replace it with your own configured name as needed.

以下是可用方法列表：

• angle – Reports the angular position of the Potentiometer in degrees or as a percent.

• changed – Registers a function to be called whenever the Potentiometer’s value changes.

构造函数 – 手动初始化电位器或电位器 V2。

• PotentiometerV2 – Create a Potentiometer V2.

• Potentiometer – Create a Potentiometer.

角度

angle returns the angular position of the Potentiometer.

Usage:
potentiometer_a.angle(units)

范围	描述
单位	The unit of measurement: DEGREES (default) 0.0 to 250.0 for a Potentiometer 0.0 to 330.0 for a Potentiometer V2 PERCENT – The position as a percentage of full rotation (0 to 100%)

已更改

changed registers a function to be called whenever the Potentiometer’s value changes.

Usage:
changed(callback, arg)

参数	描述
callback	先前定义的 函数，当电位器的值发生变化时执行。
arg	可选。包含要传递给回调函数的参数的元组。有关更多信息，请参阅带参数的函数。

def my_function():
  brain.screen.print("Value changed!")

# Call my_function whenever potentiometer_a's angle changes
potentiometer_a.changed(my_function)

构造函数

Constructors are used to manually create PotentiometerV2 and Potentiometer objects, which are necessary for configuring Potentiometers outside of VEXcode.

PotentiometerV2

PotentiometerV2 creates a V5 Potentiometer V2.

Usage:
PotentiometerV2(port)

范围	描述
port	The 3-Wire Port that the Potentiometer V2 is connected to: On the V5 Brain – brain.three_wire_port.x where x is the number of the port. On a 3-Wire Expander – expander.a where expander is the name of the expander instance.

# Create a Potentiometer V2 in Port A
potentiometer_a = PotentiometerV2(brain.three_wire_port.a)

Potentiometer

Potentiometer creates a Potentiometer.

Usage:
Potentiometer(port)

范围	描述
port	The 3-Wire Port that the Potentiometer is connected to: On the V5 Brain – brain.three_wire_port.x where x is the number of the port. On a 3-Wire Expander – expander.a where expander is the name of the expander instance.

# Create a Potentiometer in Port A
potentiometer_a = Potentiometer(brain.three_wire_port.a)