Experimental Research on Electronic Correlator
1.1 Introduction to the research significance of experiments
1.2 Introduce the experimental development process
1.3 Introduction to the application of experimental results in life
Second, the text
2.1 working principle of the correlator (1, correlation detection 2, correlator)
2.2 Block diagram, schematic diagram and panel diagram of the correlator
2.3 PSD waveform observation and output voltage measurement of correlator
2.4 Measurement and Observation of Correlator Harmonic Response (1, Experimental Instrument 2, Experimental Connection Figure 3, Experimental Results 4, Drawing Waveform Graph)
2.5 Correlator suppression of incoherent signals (1.Experimental instrument 2, Test block diagram of incoherent signal suppression 3.Measurement data and summary analysis)
2.6 Measurement of Overload Level of Incoherent Signals (1.Experimental Instrument 2.Test Block Diagram)
2.7 Noise Reduction and Equivalent Noise Bandwidth
2.8 Phase-sensitive detection characteristics
2.9 DC drift
2.10 Total Dynamic Range
2.11 Analysis of experimental data
2.12 Analyze experimental errors and summarize experimental conclusions.
3.1 Measuring the moving speed of a moving object with correlation
3.2 Detection of Hall potential with a sampling integrator
Notes and references
Talking about the dissertation of electromotive force
Measure the voltage U and current I at the end of the circuit, then: U = EI r, U = EI r
So the measured values of power emf and internal resistance are:
E = (UI -UI) / (I -I), r = (U -U) / (I -I)
Data processing can use U & mdash; I image.
2. Sources of systematic errors
If the road-side voltage U and current I are measured with an ideal meter, no system error will occur due to the meter's access, but the actual meter has a certain internal resistance. When the meter is connected to the circuit, the circuit structure will inevitably be changed, resulting in error.
3. Relationship between measured value and true value
In Figure 1, because the reading of the ammeter is taken as the total current, then the voltmeter becomes a part of the internal circuit, that is to say, the voltmeter and the power supply are used as the power source together, and the ammeter and the sliding rheostat are used as the external circuit. r true R v / (r + R)
When the external circuit is disconnected, the voltage at the end of the power supply is the reading of the voltmeter, that is, the measured value of the electromotive force, E test, obviously E test = E true-IVr r true
Because the reading of the voltmeter is taken as the voltage at the end of the road, the ammeter becomes a part of the internal circuit, that is, the ammeter and the power supply are used together as the power source, and the voltmeter and the slide rheostat are used as the external circuit. Therefore: r Measure = r + R> r
When the external circuit is disconnected, the current of the power supply is 0. At this time, there is E test = E true
If you start from the measurement principle and analyze the relationship between the measured value and the real value, you can reduce the difficulty of understanding the error analysis. The editor teacher organized a brief discussion and analysis of electromotive force for everyone. I hope it will be helpful to everyone.