Jeremy G. Dunne - Littleton CO Patrick J. Delohery - Castle Rock CO
Assignee:
Laser Technology, Inc. - Englewood CO
International Classification:
G08B 2100
US Classification:
340679, 3406861, 340 343, 340 37
Abstract:
A sensor for determining the position of a movable object along a selected axis. The system includes a target positioned at a location aligned with the selected axis. An optical energy emitter is mounted on the movable object and has a beam dispersion greater than two degrees directed at the target. An optical energy receiver is mounted on the movable object and aligned to receive optical energy reflected by the target. The optical energy detector generates a receive signal indicating reception of the optical energy. A time of flight circuit coupled to the emitter and receiver generates a flight time signal indicating the elapsed time from emission of the optical energy to reception of reflected optical energy. A control circuit monitors the flight time signal and outputs a position signal indicating position of the movable object with respect to the target.
Self-Calibrating Precision Timing Circuit And Method For A Laser Range Finder
A highly precise range measurement instrument is made possible through the use of a novel and efficient precision timing circuit which makes use of the instruments internal central processing unit crystal oscillator. A multi-point calibration function includes the determination of a âzeroâ value and a âcalâ value through the addition of a known calibrated pulse width thereby providing the origin and scale for determining distance with the constant linear discharge of capacitor.
Compact Speed Measurement System With Onsite Digital Image Capture, Processing, And Portable Display
Richard J. Poland - Denver CO Eric A. Miller - Englewood CO Jeremy G. Dunne - Highlands Ranch CO David W. Williams - Littleton CO Mark Frischman - Thornhill, CA Bruce Kenneth Clifford - Brampton, CA
Assignee:
Laser Technology, Inc. - Englewood CO
International Classification:
G06F 1500
US Classification:
702142, 702143, 702149, 700159, 701119
Abstract:
A compact speed measurement system for field or onsite use in measuring speeds of vehicles and capturing images of select vehicles. The system includes a laser speed detector for determining a speed of a vehicle in a specific target area. When a speed is determined, the detector generates a speed signal. The system includes a camera generally aligned with the speed detector operable to capture and store digital still images of vehicles in memory. The camera is programmed to respond to an image capture signal to generate and transmit a digital image file including a still image of the vehicle targeted by the detector. A portable field processor is communicatively linked to the speed detector and the camera to first receive the speed signal, to process the speed signal and to transmit an image capture signal to the camera, and to receive the digital image file from the camera.
Upper Stem Diameter Measurement And Basal Area Determination Device And Method For Utilization In Timber Cruising Applications
Jeremy G. Dunne - Highlands Ranch CO William R. Carr - Missoula MT
Assignee:
Laser Technology, Inc. - Centennial CO Kama-Tech (HK) Limited - Hong Kong
International Classification:
G01B 1102
US Classification:
356635, 25055924, 25055925, 348135
Abstract:
An upper stem diameter measurement (âUSDMâ) and basal area determination device for timber cruising operations incorporates a viewing window in which are projected variable, visual brackets for manual alignment by the user, or automatic setting under processor section control, with the left and right sides of a target tree stem or trunk. The device further includes a built-in inclinometer such that computations of height and stem diameter can be automatically adjusted depending on the users line of sight with respect to a horizontal plane. In a preferred embodiment, a user actuatable keypad is provided for inputting data, such as a desired operational mode, a specified basal area factor and the like, a user viewable display as well as control buttons for adjusting the visual brackets and indicating an acceptance of various of the device parameters and operational characteristics.
Efficient Optical System And Beam Pathway Design For Laser-Based Distance Measuring Device
Laser Technology, Inc. - Centennial CO Kama-Tech (HK) Limited - Hong Kong
International Classification:
G01C 3/08
US Classification:
356 401
Abstract:
An efficient optical system and beam transmission and reception pathway design of particular applicability in the implementation of a cost effective, compact laser-based range-finding instrument. The design is one in which the visual pathway may be made coincident with either the laser transmission or laser reception pathway and may conveniently be implemented in conjunction with a low cost liquid crystal display (LCD) aiming reticle and head up (HUD) information display or in conjunction with a light emitting diode (LED) element. In accordance with the present invention, relatively inexpensive plate mirrors may be used to replace more conventional and costly prism-based implementations.
High Precision Optical System And Beam Pathway Design For A Laser-Based Distance Measuring Device
Laser Technology, Inc. - Centennial CO Kama-Tech (HK) Limited - Tsim Sha Tsui, Hong Kong
International Classification:
G03H 1/00
US Classification:
359 13, 359399, 359833, 359412, 356 401, 356 502
Abstract:
A high precision, high performance optical system and beam pathway design for laser-based distance measuring, or range-finding, devices includes an etched, or etched and filled, aiming reticle in the image plane which does not require daytime use illumination, and only minimal auxiliary illumination during nighttime operation, thereby conserving available battery power. In a preferred embodiment, a low power consuming back-lit liquid crystal display provides high contrast distance or other operational information to a user superimposed upon a black-appearing field stop thereby further providing operational power savings.
Jeremy G. Dunne - Highlands Ranch CO, US Samuel J. Andrews - Castle Rock CO, US
Assignee:
Laser Technology, Inc. - Centennial CO Kama-Tech (HK) - Tsim Sha Tsui, Hong Kong
International Classification:
H03M 1/06
US Classification:
341118, 382278, 369 4752, 372 3802
Abstract:
Error introduced by analog to digital conversion of a set of laser pulses can be reduced by shifting the clock reference time associated with the firing of the laser pulse. A timing offset module shifts the timing reference of each laser pulse. Digital codes generated by the ADC from the received signals are realigned and summed eliminating systematic error introduced by clock driven operations of the ADC. A comparison of the total ADC output of detected laser pulses over a select number of clock intervals enables a return signal to be distinguishable over the systematic error.
Jeremy G. Dunne - Highlands Ranch CO, US Samuel J. Andrews - Castle Rock CO, US
Assignee:
Laser Technology, Inc. - Centennial CO Kama-Tech (HK) Limited - Tsin Sha Tsui
International Classification:
H03M 1/06
US Classification:
341118, 348302, 359656, 382278
Abstract:
Error introduced by analog to digital conversion of a set of laser pulses can be reduced by shifting the clock reference time associated with the firing of the laser pulse. A timing offset module shifts the timing reference of each laser pulse. Digital codes generated by the ADC from the received signals are realigned and summed eliminating systematic error introduced by clock driven operations of the ADC. A comparison of the total ADC output of detected laser pulses over a select number of clock intervals enables a return signal to be distinguishable over the systematic error.