Download Microwave Noncontact Motion Sensing and Analysis by Changzhi Li PDF

By Changzhi Li

An authoritative advisor to the idea, applied sciences, and cutting-edge purposes in microwave noncontact sensing and analysis

Engineering researchers have lately built fascinating advances in microwave noncontact sensing and research, with new purposes in fields starting from drugs to structural engineering, production to transportation. This publication offers an authoritative examine the present cutting-edge within the box.

Drawing upon their years of expertise in either state-of-the-art study and functions, the authors deal with microwave radar for either noncontact very important signal detection and mechanical circulate dimension. They discover key advances in daily functions of microwave and Doppler radar, particularly within the parts of radio frequency applied sciences, microelectronic fabrication strategies, and sign processing and algorithms.

Microwave Noncontact movement Sensing and Analysis:

  • Reviews the idea and technical fundamentals, from electromagnetic propagation to sign processing
  • Discusses all significant forms of movement sensing radar, together with Doppler, pulse, and FMCW
  • Explores very important advances in detection and research techniques
  • Uses a number of case experiences to demonstrate present functions in an array of fields
  • Provides built-in insurance of human very important signal detection, through-wall radar, and Doppler vibrometry
  • Offers a well-informed examine rising applied sciences and the form of items to come

An vital source for engineers and researchers with a qualified curiosity in micro-wave sensing expertise, Microwave Noncontact movement Sensing and Analysis is additionally a resource of perception and assistance for execs in healthcare, transportation security, the army, and legislation enforcement.Content:
Chapter 1 advent (pages 1–5):
Chapter 2 idea of Microwave Noncontact movement Sensors (pages 7–52):
Chapter three improvement of Microwave movement Sensors (pages 53–105):
Chapter four Advances in Detection and research ideas (pages 107–155):
Chapter five purposes and destiny developments (pages 157–202):

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Example text

489λ. 1. The H-Pair with index “i” means the (i + 2)th-to-ith and the (i + 3)th-to-(i + 1)th harmonic ratio pair. 214λ. 5 Theoretical harmonic ratio as a function of the movement amplitude. The movement amplitude m is normalized to the carrier wavelength λ. (a) H3 /H1 and H4 /H2 ratio. (b) H5 /H3 and H6 /H4 ratio (Li and Lin, 2007a). 909 By tuning the frequency for about 10% to change the wavelength, the gap can also be covered. 214λmin for a frequency tunable system, where λmin is the minimum carrier wavelength.

The desired fundamental frequency component will always be present in the spectrum. Meanwhile, even though DC offsets exist in the I /Q channels and may lead to the error of measured DC component, they only affect the DC term of S(t). Therefore, the existence of DC offset does not affect obtaining the information of the desired frequency tones. In practice, the residual baseband DC level that is the sum of the motionrelated movement and the DC offset, can be easily extracted as the average of signals in every time-domain sliding window and thus be safely removed.

If both the even-order and the odd-order harmonic ratios are used to extract the amplitude of movement, there will be more than a single result for the same measurement. The accuracy of the measurement can thus be verified by checking whether the two results agree with each other. , an even-order ratio and an odd-order ratio) will be used simultaneously for a single measurement. For example, Fig. 5 shows up to the sixth-to-fourth harmonic ratio as a function of normalized movement amplitude. 27.

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