工人, 因此, 一个好的机器人系统的设计需要使用许多传感器与机 器人控制器相接,使其尽可能接近操作工人得感知能力。
机器人技术最经常使用的传感器分为接触式的与非接触式的。 接触式传感 器可以进一步分为触觉传感器、 力和扭矩传感器。 触觉或接触传感器可以测出受 动器端与其他物体间的实际接触, 微型开关就是一个简单的触觉传感器, 当机器 人得受动气端与其他物体接触时, 传感器是机器人停止工作, 避免物体间的碰撞, 告诉机器人已到达目标; 或者在检测时用来测量物体尺寸。 力和扭矩传感器位于 机器人得抓手与手腕的最后一个关节之间, 或者放在机械手得承载部件上, 测量 反力与力矩。力和扭矩传感器有压电传感器和装在柔性部件上的应变仪等。 非接触传感器包括接近传感器、视觉传感器、声敏元件及范围探测器等。 接近传感器和标示传感器附近的物体。 例如, 可以用涡流传感器精确地保持与钢 板之间的固定的距离。 最简单的机器人接近传感器包括一个发光二极管发射机和
一个光敏二极管接收器, 接收反射面移近时的反射光线, 这种传感器的主要缺点 是移近物对光线的反射率会影响接收信号。 其他得接近传感器使用的是与电容和 电感相关的原理。
视觉传感系统十分复杂, 基于电视摄像或激光扫描的工作原理。 摄像信号 经过硬件预处理, 以 30帧至 60帧每秒的速度输入计算机。 计算机分析数据并提 取所需的信息,例如,物体是否存在以及物体的特征、位置、操作方向,或者检 测元件的组装及产品是否完成。
声敏元件用来感应并解释声波, 从基本的声波探测到人们连续讲话的逐字 识别, 各种声敏元件的复杂程序不等, 除了人机语音交流外, 机器人还可以使用 声敏元件控制弧焊, 听到碰撞或倒塌的声音时阻止机器人的运动, 预测将要发生 的机械破损及检测物体内部缺陷。
还有一种非接触系统使用投影仪和成像设备获取物体的表面形状信息或 距离信息。
传感器有静态探测与闭环探测两种使用方法。 当机器人系统的探测和操作 动作交替进行时, 通常就要使用传感器, 也就是说探测时机器人不操作, 操作时 与传感器无关, 这种方法被称为静态探测, 使用这种方法, 视觉传感器先寻找被 捕捉物体的位置与方向,然后机器人径直朝那个地点移动。
相反, 闭式探测的机器人在操作运动中, 始终受传感器的控制, 多数视觉传感器 都采用闭环模式, 它们随时监测机器人的实际位置与理想位置间的偏差, 并驱动 机器人修正这一偏差。在闭环探测中,即使物体在运动,例如在传送带上,机器 人也能抓住它并把它送到预定位置。
Robots and robot sensor Introduction
Industrial robot and its operation is the subject of this article. Industrial robots are used
in manufacturing environment as a tool to increase productivity. It can be used to undertake routine, tedious assembly line work, or the implementation of those workers may be hazardous work. For example, in the first generation of industrial robots, there were a nuclear power plant is for the replacement of fuel rods. Workers engaged in this work may be exposed to harmful amounts of radiation in the next. Industrial robots can operate in the assembly line - to install small-scale components, such as electronic components mounted on circuit board. To this end, workers from the tedious task of this routine operation freed. The robot can be programmed to remove the bomb detonators for the disabled in our community services and play a role in many applications.
Robot arm can be seen as the end of the implementation of tools, sensors, and / or jaws to move to a predetermined position of a machine. When the robot reaches the position, it will perform a task. The task may be welded, sealed, mechanical loading, mechanical unloading, or many assembly work. In addition to programming, and open
and close the system, the general, not require the participation of people will be able to complete such work.
Robotics Glossary
Robot is a reprogrammable multifunctional manipulator that can be programmable motion moving parts, materials, tools or special devices to perform a different task. By the following paragraphs of this definition may lead to other definitions were described, which provides a complete system for the robot itself.
Location is pre-programmed robot must follow in order to complete the work and the way through. A point in these locations, the robot will stop and perform some operations, such as assembling parts, painting or welding. These pre-programmed robot position is stored in the memory device to continue operation for later use. In addition, when job requirements change, the only other programming data and these can be modified pre-programmed locations. Therefore, precisely because of the characteristics of this program, an industrial robot and one can store data, and can recall and edit the computer
is very similar.
Robot is a robot arm, which allows the robot pitch, stretching and rotating. This action is provided by the robot axis, mechanical axis, also known as robot hand of freedom. A robot can have 3-16 axis. In my later, the term degrees of freedom and a total number of robot axes associated.
Tools and not within the robot gripper itself, which is mounted on the robot arm end attachment. With the end of the robot arm connected to these attachments, the robot can lift parts, spot welding, painting, welding, drilling, deburring, the request can also point to various types of tasks.
Robot system can also control the operation of the robot's work unit. Robotic work cell is a general environment in the environment, the robot must perform the tasks entrusted to it. The unit can accommodate the controller, the robot manipulator, working platforms, safety devices, or conveyor. Robot to carry out all the equipment needed for the work are included in this unit of work. In addition, the signal from the external device to communicate with the robot, so that you can tell the robot when it is part of the assembly, pick up the parts or the parts to the unloading conveyor.
Basic components
Robotic system has three basic components: the robot, controller and power source. In some robot system can be seen in the first four components, end of the implementation of parts, these parts will be described in the following sections.
Manipulator
Robot bear robot system manual work, which consists of two parts: the mechanical parts and is connected to appendages. There is also a robot appendage connected to the base.
The base of the robot work area is usually fixed in the ground. Sometimes, the base can be moved. In that case, the base is installed to the rail so that the robot can move from one place to another. For example, a robot can work for a few machine tools, loading and
unloading for each machine.
As mentioned earlier, the appendage extending from the base of the robot. The attachment is a robot arm. It can be a linear movable arm, it can be a hinged arm. Articulated arm, also known as articulated arm.
Adjunct manipulator can provide a variety of sports-axis robot. The shaft is connected with the fixed base, which base has been tightened to the rack. This rack can ensure that the robot is in a position to maintain.
Ends of the arm connected to a wrist. The axis of the wrist and wrist flange by additional components, with the flange of the wrist, the robot according to the different users can work in different tools installed on the wrist.
Axis allows the robot manipulator in a certain area implementation. As mentioned earlier, the region known as the robot work unit, and its scale and size of the
corresponding robot. When the robot's physical size increases, the size of the unit of work must also increase. Mechanical hand movements by the driver, or drive system control. Drive or shaft drive system allows the movement in the work unit, drive system using electric, hydraulic or pneumatic power. Drive the energy emitted from a variety of mechanical drive into mechanical power. These drives are joined together by a
mechanical linkage. The linkage in turn drive the various robot axes. Mechanical linkage from the sprocket body, composed of gears and ball screws.
Controller
Robot controller is running in the heart. After the memory controller stores used for the pre-programmed information, control peripherals, to communicate it with the factory computer to make the production of constantly updated.
Controller used to control the manipulator motion and the outer parts of the work unit. Staff can use the box to teach hand-delivery actions programmed into the robot controller. This information can be stored in the controller's memory for later recall using the device. Robot controller stores all program data. It can store several different programs, and they
can be in any program to be edited.