Tham khảo tài liệu 'newnes sensor technology handbook 2005 yyepg lotb part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter 5 Selecting and Specifying Accelerometers Table summarizes the advantages and disadvantages of different type of accelerometers along with some typical applications. Table Comparison of accelerometer types. Accelerometer Type Advantages Limitations Typical Applications IEPE Piezoelectric Accelerometer Wide Dynamic Range Wide Frequency Range Durable High Shock Protection Powered by Low Cost Constant Current Source Fixed Output Less Susceptible to EMI and RF Interference Can be Made Very Small Less Operator Attention Training and Installation Expertise Required High Impedance Circuitry Sealed in Sensor Long Cable Driving without Noise Increase Operates into Many Data Acquisition Devices with Built-in Constant Current Input Operates across Slip Rings Lower System Cost per Channel Limited Temperature Range Max Temperature of 175 C 350 F Low Frequency Response is Fixed within the Sensor Built in amplifier is exposed to same test environment as the element of the sensor Modal Analysis NVH Engine NVH Flight testing Body In White Testing Cryogenic Drop Testing Ground Vibration Testing HALT HASS Seismic Testing Squeak and Rattle Helmet and Sport Equipment Testing Vibration Isolation and Control Charge Piezoelectric Accelerometer High operating temperatures to 700 C Wide dynamic Range Wide Frequency Range Durable High Shock Protection Flexible Output Simpler Design fewer parts Charge Converter electronics is usually at ambient condition away from test environment More Care attention is required to install and maintain High impedance circuitry must be kept clean and dry Capacitive loading from long cable run results in noise floor increase Powered By Charge Amp which can be complicated and expensive Need to use Special Low Noise Cable Jet Engine High Temperature Steam Pipes Turbo Machinery Steam Turbine Exhaust Brake 150 Acceleration Shock and Vibration Sensors Table Comparison of accelerometer types continued . Accelerometer Type Advantages .
