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| Number | Title | Issue Date |
| 7315355 | Method and device for optical distance measurement A method and a device for optically measuring a distance by emitting an amplitude modulated and bundled optical signal and by receiving the signal reflected from a target object. The modulation frequency is continuously regulated by means of a regulating loop in suc... | 01/01/2008 |
| 7239262 | Delivery of quasi-periodic pulses of EM energy utilizing the principle of beating-wave amplification The present invention is related a method and system for irradiating a target location or material with high-amplitude narrow pulses of electromagnetic (EM) energy at a periodic or quasi-periodic rate. The method and system comprises generating at least three electr... | 07/03/2007 |
| 7145452 | Detection of bodies Detection of the presence of an animal body, for instance a human, in a detection zone is achieved by generating a low power LF field (17) between antennae (12, 18), and by measuring the disturbance of this field by the body. An analyser (16) is... | 12/05/2006 |
| 7102487 | Detector and lock controller using same A lock controller has main apparatus provided to a lockable door and a detector for detecting an approaching or retreating target object. The detector includes an oscillator device for generating a transmission wave, a branching device for branching the transmission... | 09/05/2006 |
| 7080554 | High-precision measuring method and apparatus A method and apparatus for monitoring a condition having a known relation to, or influence on, the transit time of a cyclically-repeating energy wave moving through a transmission channel, by: (a) transmitting a cyclically-repeating energy wave through the transmiss... | 07/25/2006 |
| 6856141 | High-precision measuring method and apparatus A method and apparatus of measuring a predetermined parameter having a known relation to the transit time of movement of an energy wave through a medium, by transmitting from a first location in the medium a cyclically-repeating energy wave; receiving the cyclically... | 02/15/2005 |
| 5617098 | Multichannel radar system for motor vehicles A multichannel radar system for use on a motor vehicle has a plurality of transmission and reception channels each composed of an AM or FM signal generator for generating an AM or FM signal including a carrier which is amplitude- or frequency-modulated by... | 04/01/1997 |
| 5125736 | Optical range finder An optical range finder includes two detectors for minimizing frequency dispersion affects of the detectors on the system. The optical range finder is calibrated by locking a voltage controlled oscillator onto adjacent null modulation signal frequencies a... | 06/30/1992 |
| 4812035 | AM-FM laser radar A laser radar system wherein a beam of continuous wave (CW) electromagnetic energy is generated with frequency modulation (FM) and amplitude modulation (AM) being imposed thereon to produce an amplitude and frequency modulated, continuous wave beam of ene... | 03/14/1989 |
| 4315260 | Method and apparatus for measuring the distance between a primary station and a secondary station A method and apparatus for measuring the distance between a primary station and a secondary station, each having an antenna for transmitting and receiving continuous wave signals, modulated by a measuring signal, the distance being determined at the prima... | 02/09/1982 |
| 4186397 | Short range precision navigation and tracking system and method therefor A short range, precision navigation and tracking system and method therefor are disclosed. The navigation and tracking system utilizes a master-repeater configuration with a phase lock loop controlling the modulation frequency of the master FM transmitter... | 01/29/1980 |
| 4107684 | Phase locked detector A microwave or ultrasonic detection system is disclosed which has a voltage controlled transmitter oscillator. The output of the transmitter oscillator is transmitted into a designated area from a transmit antenna and is reflected by objects in the area a... | 08/15/1978 |
| 3973259 | Device for indicating changes in the position of an object Apparatus for measuring vibrations in turbines and like objects in which electromagnetic signals are directed at the object by a transmitter and reflections of the signals from the object are received by a signal receiver. The transmitted and received sig... | 08/03/1976 |
