HB1. 00 Microwave Motion Sensor An Introduction. Electronics hobbyists, experimenters and constructors of microcontroller project frequently need to measuredetect voltage, current, frequency, temperature and proximity. Most measure mentsdetections can be carried out using pre wired add on modules integrated with suitable sensorstransducers. Unfortunately, real motion detection requires rather more sophisticated and thus more expensive sensor. Design Equations Patch Antenna' title='Design Equations Patch Antenna' />However, the microwave motion sensor module HB1. HB1. 00 miniature microwave motion sensor is an X band, Bi static doppler transceiver module. This module is ideal for alarm, motion detection, vehicle speed measurement, automatic lighting, and door projects. HB1. 00 General Features. Low current consumption 3. A typicalCW or Pulse operation. Flat profile. Long detection range. ITUR Study Groups celebrate 90 years 2017 marks the 90th anniversary of the CCIRITUR Study Groups, a testimony of global collaboration to produce universally. In radio an antenna is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or. International Journal of Engineering Research and Applications IJERA is an open access online peer reviewed international journal that publishes research. Homebrew RF Circuit Design Ideas There is no such thing as a new idea. Beats Audio Apk For Android Free Download. It is impossible. We simply take a lot of old ideas and put them into a sort of mental. Antenna design calculators collected in AntennasAntenna Calculators at The DXZone. Supply voltage 4. V and 5. 2. 5VX band frequency 1. GHz typicalRadiated power EIRP 1. Bm minimumRelated Products Tuners RF ICs Misc. The Doppler Effect. Doppler radar uses the same principles discovered by Christian Doppler when observing sound and applies them to electromagnetic waves. Using the Doppler Effect is a great way to measure relative speed. In practice, the Doppler Effect is a shift in frequency perceived by a receiver from a signal source due to relative movement of the sender andor receiver. In a Doppler radar system, a known frequency signal is transmitted from an antenna which is pointed at a reference object. A separate antenna is used to receive the signal that is reflected back from the reference to measure the Doppler shift of the signal. A simple Doppler module, also called as the microwave motion sensor, can be easily integrated into multiple types of systems for various purposes. Doppler modules have an internal oscillator used to produce the signal frequency transmitted as the source. The received signal is then mixed with this set signal, which produces an output that is a sinusoid containing the frequency difference between the sender and receiver signals. Usually, these values need to be processed in a tangible way and is usually done with the help of a microcontroller. HB1. 00 outline diagram and antenna beam pattern. HB1. 00 Insights. The HB1. 00 module consists of Dielectric Resonator Oscillator DRO, microwave mixer and patch antenna. The module operates at 5 Vdc for Continious wave CW operation, but module can be powered by 5. V low duty cycle pulsed trains in order to reduce its power consumption sample hold circuit at the IF output is required for pulse operation. The following indicators should be considered when using the HB1. There is no user adjustable part in this module to set the transmit frequency and power of the module. The module must be mounted with the antenna patches facing to the desired detection zone. The magnitude of the Doppler Shift output from IF is proportional to reflection of transmitted energy and is in the range of microvolts V, and the frequency of Doppler shift is proportional to the velocity of motion typical human walking generates Doppler shift below 1. HzThe received signal strength RSS is the voltage measured of the Doppler shift at the IF output. Design Equations Patch Antenna' title='Design Equations Patch Antenna' />
Special attention has to be given to the interference pick up from fluorescent light, as the 1. Hz noise is closed to the Doppler frequency generated by human movement. Similarly, rapid switching of certain devices relay,motor, etc. IF terminal. DC level exists at the IF output and its polarity can be positive or negative. Its magnitude may vary over temperature. AC coupling is recommended for IF output connection. HB1. 00 block diagram and connection pads. Quick Maths. The easiest way for a microcontroller to read data from an analog device is if it outputs a dc level voltage. Although some modules have this feature built into them, many others output just an AC signal, so a frequency to voltage F V circuit must be implemented. This F V circuit can be used to calibrate the output data for a specific set of expected frequencies coming from the module to contain it in reference voltage range. Sampling of the available data and the manipulation of it through software is needed to make it useful for the system. This pre processed value can then be manipulated using Doppler equations to find the speed of the target object. Arduino HB1. 00 Unlimited If you are in a plan to build something similar like an intelligent device on a door which alerts you about an attack in progress on the other side of the door, then go through this amazing Arduio HB1. Ch341 Drivers Windows 7. Microwave Motion Sensors for Fun and Profit http jpnelson. Authors lab Tech. Node PROTOLABZ is waiting for the arrival of more HB1.