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【简答题】
Pipeline Exploration Robot Regular inspection of pipelines is a key factor in ensuring safe transport and finding pipe leakages or blockages for a wide variety of applications , e.g. oil and gas transport. Using pipeline exploration robots to enter pipelines and carry out inspection work with HD cameras greatly increases Efficiency and quality of inspection. A pipeline exploration robot system includes a control station and a robot. A control station is a single board computer or a PC responsible for receiving, storing and displaying video signals sent by robots as well as controlling robots’behavior by sending instructions. Pipeline exploration robots consist of a multimedia application processor, status and environment information, camera and a communication system. The application processors controls robots’ movements and operate the camera system based on the instructions sent by the control station, while simultaneously sending robot status and encoded video signals back to the control station. Pipeline exploration robots usually use wheels or caterpillar tracks (履带) as their moving system because gas/ oil pipelines always have a large diameter. An individual moving system of this kind is equipped with multiple brushless motors to ensure the capability of overcoming obstacles. The status and environment information system is composed of a rotary encoder (旋转编码器) , an electronic compass, a 3—axis accelerometer and temperature & humidity sensors. The system can provide general information about robots’locations, speed and inclination angle, temperature & humidity data which are helpful for the operators to make decisions on robot behavior control. The camera system consists of motion control and video processing units, and usually is coupled with an ultrasonic sensor to detect the thickness status of pipelines. The motion control unit has a servo motor to adjust the camera’s height and rotation so that all the areas in the pipelines can be scanned by camera. The task of video signal processing is handled by imaging sensors and multimedia application processors which work together to implement video capture , signal conversion and encoding processes. In order to achieve better communication quality and longer distance, the encoded video and control signals are combined into a single signal by a FPGA (现场可编程门阵列) included in the communication system, and then processed by a serializer to produce LVDS (Low Voltage Differential Signal) to be transmitted through twisted-pair cables. If signals have to travel a much longer distance, fiber-optic cables could be a good option as they can cover distances up to several kilometers. As robotics technology develops, future pipeline exploration robots would feature more sophisticated A. I. (Artificial Intelligence), making them capable of “thinking and working” with minimum human intervention.
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举一反三
【单选题】以下对于直方图说法不正确的是:( )。
A.
当剔除了不合格品后,容易出现绝壁型直方图
B.
双峰型直方图是异常直方图的一种,表示可能测量值来自两种分布
C.
只要直方图的分布范围没有超出标准范围,就说明加工能力是充分的
D.
正常型直方图是中间高,两边低,左右对称的
【单选题】丙酰溴与乙酸钠反应,生成[ ]
A.
乙酸酐
B.
丙酸酐
C.
乙酸丙酸酐
D.
不反应
【判断题】应酬式的自我介绍一般用于应试、应聘场合。
A.
正确
B.
错误
【单选题】丙酰溴与乙酸钠反应,生成[ ]
A.
乙酸酐
B.
丙酸酐
C.
乙酸丙酸酐
D.
以上都是
【单选题】按照透视的规律 , 灭点消失在
A.
地平线
B.
视平线
C.
地中央
D.
视基线
【判断题】雇员30人以上的日本企业的工资水平大约为每月29.34万日元。( )
A.
正确
B.
错误
【简答题】血府逐瘀汤的功用是
【单选题】在气相色谱中,调整保留时间实际上反映了()分子间的相互作用
A.
组分与载气
B.
组分与固定相
C.
组分与组分
D.
载气与固定相
【单选题】丙酰溴与乙酸钠反应,生成[ ]
A.
乙酸酐
B.
丙酸酐
C.
乙酸丙酸酐
D.
以上都不是
【单选题】以下对于直方图说法不正确的是:________。
A.
正常型直方图是中间高,两边低,左右对称的
B.
当剔除了不合格品后,容易出现绝壁型直方图
C.
双峰型直方图是异常直方图的一种,表示可能测量值来自两种分布
D.
只要直方图的分布范围没有超出标准范围,就说明加工能力是充分的
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