How many parts does a general measurement system consist of? What is the function of each part?

It is mainly composed of four links: controller, controlled object, actuator and transmitter.

Controller: A master device that can change the wiring of the main circuit or control circuit in a predetermined sequence and change the resistance value in the circuit to control the starting, speed regulation, braking and reverse direction of the motor.

Controlled object: generally refers to the equipment or process to be controlled, such as the control of reactors and distillation equipment, or the control of heat transfer processes and combustion processes, etc.

From the perspective of quantitative analysis and design, the control object is only some of the factors that affect the input and output parameters of the object in the controlled equipment or process, not all of the equipment.

Actuator: uses liquid, gas, electricity or other energy and converts it into driving action through motors, cylinders or other devices.

Transmitter: Its function is to detect process parameters and transmit the measured values ??in a specific signal form for display and adjustment.

The function of the automatic detection and adjustment system is to convert various process parameters such as temperature, pressure, flow, liquid level, composition and other physical quantities into a unified standard signal, and then transmit it to the regulator and indication recorder for adjustment, indication and

Record.

Extended information The role of a measurement system: A measurement system is a collection of instruments or measuring tools, standards, operations, methods, fixtures, software, personnel, environments and assumptions used to quantitatively measure or qualitatively evaluate measured characteristics; used to obtain measurement results

the whole process.

In the ISO/TS16949 standard, a measurement systems analysis method (Measurement Systems Analysis) is provided, which is one of the five manuals of the standard. Measurement system analysis also has special software for analysis.

The purpose of the measurement system: 1. Determine whether the data used is reliable.

2. Evaluate new measuring instruments.

3. Compare two different measurement methods.

4. Evaluate measurement methods that may have problems.

5. Identify and solve measurement system error problems.