This system illustrates the communication system from load cell to PC. The laboratory’s 6-axis load cell is usually composed of four strain gauges in a Wheatstone bridge form. This device produces an output signal in the order of a few millivolts. Thus, an instrumentation amplifier is used to amplify the signal before feeding it to an ADC. Moreover, this system should use a low-pass filter to pass the low-frequency signals and to avoid interference from high-frequency noises. Afterwards, all the 6 channels are measured simultaneously by time division multiplexing method. In addition, there is a sample-and-hold circuit for converting the signal from analog to digital. Finally, this system uses a digital interface to convey all of information to the digital processor.
B. Describe the signal conditioning need to convert the resistance change in the strain gauge ±10 volt signal.
Basically, the strain gauge signal conditioning circuit provides a controlled excitation source and works together 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 out quiescent loads. On the other hand, some strain-gauge signal conditioners support adjustments of fixed gain, offset, and excitation.
Figure 2: Instrumentation Amplifier circuit
From the equation given as, V_out/(V_2-V_1 )=( 1+ 〖2R〗_1/R_gain ) R_3/R_2
With this circuit is represented construct out of the accurate amplification of the difference between two voltages with three resistors linking a third op Amp. Consider all resistors to be of equal value except for...
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...e by the use of a multiplexer. The six analog signals from the strain gauges are associated into one signal by the help of a multiplexer. After that, the logic multiplexer will send the signal to the ADC converter which then converts the signal into digital format for the PC to interpret. This process is shows in figure 6
Figure 6: Interfacing Six channels with the support of Multiplexer
D5. The minimum “ Sampling rate” use in this system
The sampling rate to be used depends on the speed at which the ADC is able to collect samples into an on-board buffer. In other words, it is the speed at which the digitizer’s ADC converts the input signal, after the signal has passed through the analogue input path to digitalised values. The sample rate is based on the sample clock that notifies the ADC when to convert the analogue signal to digital values.
After compression, the structure data, audio and video must be multiplexed. A number of compressed TV signals are combined by a multiplexer and put unto a shared transition medium. This is done by one of the two possible kinds of multiplexers that result in either a transport or a program stream, which is suited for secure transmission paths since it can contain large amounts of information. In addition multiplexing can be done using various methods. Time division multiplexing allocates a distinct time interval for each channel in a set; with the help of synchronization and a fixed interval order the channels take turns using the common line.
Using the electronic balance given, mass the copper wire and record it in the data table.
Synchronized measurements of voltages and currents are done by Phasor measurement Units (PMUs). Each PMU has three essential components.
In turn these voltages are measured and the derived values are inputted into the digital computer which is a highly coordinated network of wires. In addition, the aircraft travels through the air or is airborne with the aid of some certain input programme which the digital computer passed into the system and controls the aircraft. Accordingly, the digital computers output is processed and sent out in the form of electrical signals, which is fed by wires to the actuators, which then moves the control surfaces.
The uses of Digital Signal Processing in communications has become so large scale that nearly any form of analog communication is considered obsolete. Today, nearly any form of communication used, aside from verbal communication, relates to Digital Signal Processing. Some of the more prominent uses for DSP in communications are; local area networks, cell pho...
5) Add a weight of 100N (change appropriately). Wait for a few seconds for the system to “stabilise”. Measure the length of the elastic and record the data. Special care must be taken to ensure that when the mass is added the elastic should not retract.
• For this particular experiment the gain of the output for the strain gauges are set to 1 as 0 to 8 degrees slip angle is been measured. If smaller angles are measured a larger gain may be required.
Microbalance is designed so that a change in the weight of sample generates an electrical signal proportional to the change of weight. By data processing system, the electrical signal transform into weight or weight loss and it is plotted on the y-axis of thermal curve.
On the first subsystem I measured the voltage at the points that will be going to the op-amp. On the first subsystem I me...
To read a signal in an oscilloscope it includes the following steps: voltage measurements, time and frequency measurements, pulse and rise measurements and phase shifts.
3. To analyze the simulation results using MATLAB on the changed of parameters of the DC
It is a quick and efficient method of estimating number of bacteria in liquid media. It is basically to measure the turbidity or cloudiness of culture and convert it into number of cells.
This essay will look at the differences of two filters, the infinite impulse response (IIR) and the finite impulse response (FIR). Each filter will be observed and will be discussed how they operate differently to each other. Each filter has its own unique characteristics in the filtration of signal. Each filter has its advantages and disadvantages, each filter operates differently and in turn causes different results when modulating a signal.
People in the present society have turned from the use of the old means of communication to the more advanced and technological ways of communicating. Technology has made it easier for people to communicate in a faster, efficient, and cost saving means through the introduction of the communication channels. The world has turned out to be the centre for technology with different technologies emerging daily as the people continue to develop from time to time to cope with the growing technology. The benefits of adopting the communication technology are explained in this article which shows why people do not function without technology.