- What is an acoustic emission sensor? What is the principle and types of AE sensors?
Brief: Acoustic emission sensors are made of the principle that the physical properties of certain substances (such as semiconductors, ceramics, piezoelectric crystals, strong magnetic bodies and superconductors) change with the action of the outside world t - What is AST (Auto Sensor Testing) function of AE sensor?
Brief: Automatic sensor testing (AST) is transmitting pulse signals through a certain channel sensor, the signal reception of all channels is observed to check the connection of each channel, the coupling of sensors and sensitivity. This AST function could b - Is the AE sensor customizable? What are the requirements? How long is the lead time?
Brief: Special acoustic emission sensors are available for customization according to customer requirements. - Is the AE sensor compatible with acquisition boards from other companies like PAC or VALLEN?
Brief: AE sensor converts the displacement signal of the object surface into the analog voltage signal through the piezoelectric effect, and then amplifies the signal and transmits it to the data acquisition board through the preamplifier. - AE sensor calibration method
Brief: AE sensor calibration method - The connection mode of acoustic emission sensor and NI acquisition card and related connection diagram description.
Brief: Most of the NI acquisition cards cannot be directly connected to the acoustic emission sensor, instead of connecting preamplifier between NI and sensor. One of the reasons is that the voltage signal output by the acoustic emission sensor is too small - How to choose the length of the signal cable?
Brief: If the sensor without built-in preamplifier is used, the signal cable between sensor and preamplifier should not be longer than 2m. The signal cable between preamplifier and data acquisition device is recommended not longer than 100m. If the sensor wi - How to supply power to AE sensors?
Brief: If the sensor without preamplifier inside was used, no power supply is required. If the sensor with a built-in preamplifier was used, a phantom power supply from by the acoustic emission acquisition card can connected to the preamplifier with 28V DC/ - What is the output of the acoustic emission sensor? What is the output range? What is the frequency coverage of acoustic emission sensors?
Brief: Acoustic emission sensor outputs are analog voltage signals. The original AE sensor output before amplification is between 0dB to 100dB (0dB = 1uV, i.e. +/-1uV to 100mV). The acoustic emission signals from the sensors are usually followed by the pream - How to choose the corresponding acoustic emission sensor according to different material and application scenarios？
Brief: How to choose the corresponding acoustic emission sensor according to different material and application scenarios？ - What is the difference between integral preamp sensor and general type sensor?
Brief: General type sensor: the sensor is generally composed of a shell, protective film, piezoelectric element, damping block, connecting wire and high frequency socket. There is no signal preamplifier circuit inside. When the sensor is used, it needs to us - How to fix the sensor on the surface of the object under test?
Brief: In general, there are three ways to fix the sensor on the surface of the object under test ： 1. Magnetic hold-downs: when the measured object is metal and the surface of the object is flat, the magnetic hold-downs can be used to fix, this way can be - How to select sensor model and determine number of channels in acoustic emission detection?
Brief: The choice of sensor model mainly depends on the frequency of the measured acoustic emission signal
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