第五章速度、转速和加速度的测量讲述
合集下载
相关主题
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
7.2 Measurement of Velocity
7.3 Measurement of Acceleration
7.4 Vibration test
7.1 Overview
Measurement of velocity and acceleration for vehicle, train, ship, plane, etc，and that of their moving attitude Rotational velocity for output shaft speed of engine and generator Velocity of rolled plate, strip, bar, tubing material Measurement of vibration for large devices and engineering
Average velocity method
Correlation velocity measurement
Strong anti-interference
ability and make the measurement under complex interference conditions .
and magnitude of changes in velocity.物体运动时单 位时间内的速度增量，m/s2
Rotational Velocity：物体运动时单位时间内的转 数，r/min Angular Velocity：物体单位时间内转过的角度， rad/s
Chapter Seven Measurement of velocity, acceleration and vibration
Contents
7.1 Overview
7.2 Measurement of Velocity
7.3 Measurement of Acceleration
7.4 Vibration test
7.2 Measurement of Velocity
From motion form： measurement of linear velocity( 线速度) and angular velocity(角速度) From reference: measurement of absolute velocity(绝 对速度) and relative velocity(相对速度)
7.2 Measurement of Velocity
Instantaneous velocity, on the other hand, describes the motion of a body at one particular moment in time. From accessible means: measurement of direct velocity(直接速度)and indirect one(间接速度)
From numerical feature: measurement of average velocity(平均速度) and instantaneous velocity(瞬时 速度) The average velocity of an object is the total displacement during some extended period of time, divided by that period of time.
7
School of mechanical and power engineering/Henan polytechnic university
Chapter Seven Measurement of velocity, acceleration and vibration
Contents
7.1 Overview
Applications in inertial navigation
7.1 Overview
Velocity：a vector which shows the direction and rate of motion. 物体直线运动时单位时间内的位移
量，mLeabharlann Baidus
Acceleration：a vector which shows the direction
measurement of plane, ship, and rolling mill strip, etc. principle, two sensors is set in the direction of velocity of a moving object, and the velocity can be measured using crosscorrelation principle.
Measurement of linear velocity
Average velocity method
Definition
of velocity：v=L/t
Acceleration integration method/Differential of the displacement
在振动测量中，通过测量振动体的加速度，积分得到振
动速度、振幅等
Velocity measurement using physical parameters
Mathematical
as E=BLv
model of speed and physical quantity，such conductor velocity measurement
Bernoulli's equation in hydromechanics
Doppler velocity
Average velocity method
光束切断法(短距离平均速度法)
Average velocity method
Correlation velocity measurement
y(t ) x(t t 0 )
1 T 1 T Ryx ( ) lim y (t ) x(t )dt lim x(t t0 ) x(t )dt Rx ( t0 ) T T 0 T T 0
7.3 Measurement of Acceleration
7.4 Vibration test
7.1 Overview
Measurement of velocity and acceleration for vehicle, train, ship, plane, etc，and that of their moving attitude Rotational velocity for output shaft speed of engine and generator Velocity of rolled plate, strip, bar, tubing material Measurement of vibration for large devices and engineering
Average velocity method
Correlation velocity measurement
Strong anti-interference
ability and make the measurement under complex interference conditions .
and magnitude of changes in velocity.物体运动时单 位时间内的速度增量，m/s2
Rotational Velocity：物体运动时单位时间内的转 数，r/min Angular Velocity：物体单位时间内转过的角度， rad/s
Chapter Seven Measurement of velocity, acceleration and vibration
Contents
7.1 Overview
7.2 Measurement of Velocity
7.3 Measurement of Acceleration
7.4 Vibration test
7.2 Measurement of Velocity
From motion form： measurement of linear velocity( 线速度) and angular velocity(角速度) From reference: measurement of absolute velocity(绝 对速度) and relative velocity(相对速度)
7.2 Measurement of Velocity
Instantaneous velocity, on the other hand, describes the motion of a body at one particular moment in time. From accessible means: measurement of direct velocity(直接速度)and indirect one(间接速度)
From numerical feature: measurement of average velocity(平均速度) and instantaneous velocity(瞬时 速度) The average velocity of an object is the total displacement during some extended period of time, divided by that period of time.
7
School of mechanical and power engineering/Henan polytechnic university
Chapter Seven Measurement of velocity, acceleration and vibration
Contents
7.1 Overview
Applications in inertial navigation
7.1 Overview
Velocity：a vector which shows the direction and rate of motion. 物体直线运动时单位时间内的位移
量，mLeabharlann Baidus
Acceleration：a vector which shows the direction
measurement of plane, ship, and rolling mill strip, etc. principle, two sensors is set in the direction of velocity of a moving object, and the velocity can be measured using crosscorrelation principle.
Measurement of linear velocity
Average velocity method
Definition
of velocity：v=L/t
Acceleration integration method/Differential of the displacement
在振动测量中，通过测量振动体的加速度，积分得到振
动速度、振幅等
Velocity measurement using physical parameters
Mathematical
as E=BLv
model of speed and physical quantity，such conductor velocity measurement
Bernoulli's equation in hydromechanics
Doppler velocity
Average velocity method
光束切断法(短距离平均速度法)
Average velocity method
Correlation velocity measurement
y(t ) x(t t 0 )
1 T 1 T Ryx ( ) lim y (t ) x(t )dt lim x(t t0 ) x(t )dt Rx ( t0 ) T T 0 T T 0