Selectable filed motion detector

Abstract

A detection field selectable motion sensor that includes a modulator having a output with a shaped response to received radiation emissions forming a detection field and a sensor configured to detect the output from the modulator. The motion sensor can be configured with a set of lenses that can be aligned with the sensor. Further, the motion sensor can be an active sensor that transmits electromagnetic radiation which is detected after reflection from a detection field. Infrared radiation is the preferred source of received and transmitted radiation but microwave or visible light can be used. For an active motion detection either coherent or incoherent radiation can be used. The motion sensor includes a means for mounting and a hinge or swivel for orientating the sensor.

1 . A detection field selectable motion sensor comprising:
 a. a modulator having an output with a shaped response to received radiation emissions forming a detection field; and   b. a sensor configured to detect the output.   
     
     
         2 . The motion sensor of  claim 1 , wherein the output is infrared, radar, or laser radiation. 
     
     
         3 . The motion sensor of  claim 1 , wherein the modulator includes a set of movable lenses each having a different shaped response to the radiation emissions. 
     
     
         4 . The motion sensor of  claim 3 , wherein the set of movable lenses includes Fresnel lenses. 
     
     
         5 . The motion sensor of  claim 3 , wherein the set of moveable lenses are coupled to an adjustable housing configured to move each of the lenses in and out of the alignment with the sensor. 
     
     
         6 . The motion sensor of  claim 5 , wherein the adjustable housing is wheel with the set of movable lenses, and wherein the wheel is configured for each lens to be aligned with the sensor upon a rotation. 
     
     
         7 . The motion sensor of  claim 5 , wherein the adjustable housing is a tube, wherein the set of lens are coupled to the tube, and wherein the tube is configurable to align each lens with the sensor. 
     
     
         8 . The motion sensor of  claim 7 , wherein the tube is rotated to align each lens with the sensor. 
     
     
         9 . The motion sensor of  claim 5 , wherein the adjustable housing is moved along an axis to align each lens with the sensor. 
     
     
         10 . The motion sensor of  claim 9 , further comprising a member having an aperture and slidable coupled to the adjustable housing, wherein the aperture is aligned with the sensor and the member is configured so that each lens can be positioned within the aperture. 
     
     
         11 . The motion sensor of  claim 1 , comprising an adjustable bracket for changing the detection field. 
     
     
         12 . The motion sensor of  claim 10 , wherein in the bracket is movable in one axis. 
     
     
         13 . The motion sensor of  claim 1 , further comprising means for generating the radiation emissions. 
     
     
         14 . The motion sensor of  claim 12 , wherein the means for generating the radiation emissions are an infrared, radar, or laser transmitter. 
     
     
         15 . A method for selecting a detection field for a motion detector comprising the steps;
 a. generating a shaped response to received radiation emissions; and   b. detecting the shaped response.   
     
     
         16 . The method of  claim 15 , wherein the received radiation emissions are infrared, radar, or laser radiation. 
     
     
         17 . The method of  claim 15 , wherein the method of shaping the response to received radiation emissions is with a set of movable lenses. 
     
     
         18 . The method of  claim 15 , further comprising the step of moving an adjustable bracket to change the detection field. 
     
     
         19 . The method of  claim 15 , further comprising the step of generating the radiation emissions. 
     
     
         20 . The method of  claim 19 , wherein the generated radiation emissions are infrared, radar, or laser radiation.