3检测技术1（3 detection technique 1）.docVIP

3检测技术1（3 detection technique 1） This paper consists of 315560859 contributions Ppt documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. The third chapter review review: introduction: Given value, x+, deviation, control signal, controller, manipulated variable Automation of chemical instrument interfere E - P Actuator Q Controlled object Controlled variable Y Z measured value Detecting element and transmitter Detection is an important part of the control system! The third chapter overview: 3-1 detection technology - overview: Automation of chemical instrument The concept of detection: detection concept: using experimental method, through the comparison process, get a numerical unknown. To correctly guide the production operation, ensure the safety of production, ensure product detection: detection function: quality and automation of the production process. The process of detection: detection of process parameters to be measured: Convert into a corresponding physical quantity; transform and enlarge S Standard signal (display) The composition of testing instrument: the composition of sensor + change amplifying device + display monitor The third chapter, detection technology, the basic knowledge of instrumentation: the basic knowledge of instrumentation: 1, instrument working conditions: Reference conditions: instrument calibration, calibration of environmental conditions, normal working conditions: instrument can be used normally in environmental conditions Automation of chemical instrument Such as: a temperature instrument detection fan 2, instrument measuring range and range: the circumference is: 100 degrees to 1500 degrees of temperature measurement range: measuring range Xmin ~ Xmax X: measurement limit Xmax: measurement limit Min Range: L=Xmax -Xmin, range 3, instrument measurement error: Error Classification (source): system error: random error: negligence error: The r