This system illustrates the force sensor to PC communication system. The 6-axis load cell in the laboratory is usually composed of four strain gauges in the form of a Wheatstone bridge. This device produces an output signal on the order of a few millivolts. So, an instrumentation amplifier is used to amplify the signal before sending it to an ADC. Additionally, this system must use a low-pass filter to pass low-frequency signals and avoid interference from high-frequency noise. Then, the 6 channels are measured simultaneously by the time multiplexing method. Additionally, there is a sample and hold circuit to convert the analog signal to digital. Finally, this system uses a digital interface to transmit all information to the digital processor.B. Describe the need for signal conditioning to convert the change in resistance into the strain gauge signal ±10 volts. Basically, the strain gauge signal conditioning circuit provides a controlled excitation source and works with the instrumentation amplifier. The instrumentation amplifier provides gain that amplifies the input signal to fully exploit the range of the data acquisition system as well as the resolution of the ADC. It can also adjust the offset to zero the resting loads. On the other hand, some strain gauge signal conditioners support fixed gain, offset, and excitation adjustments. Figure 2: Instrumentation amplifier circuit According to the equation given by V_out/(V_2-V_1)=(1+〖2R〗_1/R_gain) R_3/R_2With this circuit is shown built from the precise amplification of the difference between two voltages with three resistors connecting a third operational amp. Consider all resistors to be equal in value except ...... middle of paper ...... e using a multiplexer. The six analog signals from the strain gauges are combined into a single signal using a multiplexer. After that, the logic multiplexer will send the signal to the ADC converter which will then convert the signal into digital format for the PC to interpret. This process is illustrated in Figure 6Figure 6: Interfacing six channels with MultiplexerD5 support. The minimum “sampling rate” used in this system. The sampling rate to use depends on how quickly the ADC is able to collect samples into an on-board buffer. In other words, it is the speed at which the digitizer ADC converts the input signal, once the signal has passed through the analog input path, into digitized values. The sample rate is based on the sample clock which tells the ADC when to convert the analog signal to digital values..