| Patent Number |
Title Of Patent |
Date Issued |
| D390483 |
Compact laser-based distance measuring equipment |
February 10, 1998 |
|
| 7349073 |
Efficient optical system and beam pathway design for laser-based distance measuring device |
March 25, 2008 |
| 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 las |
| 7112793 |
One-chip compass implemented using magnetoresistive (MR) sensor temperature compensation and mag |
September 26, 2006 |
| A measurement technique for normalizing the sensitive-axis output of a magnetoresistive (MR) sensor which greatly reduces both temperature effects and magnetic contributions from the insensitive-axis cross-terms. Specifically, the normalization techniques disclosed may be effectuated |
| 7057173 |
Magnetoresistive (MR) sensor temperature compensation and magnetic cross-term reduction techniqu |
June 6, 2006 |
| A measurement technique for normalizing the sensitive-axis output of a magnetoresistive (MR) sensor which greatly reduces both temperature effects and magnetic contributions from the insensitive-axis cross-terms. Specifically, the normalization techniques disclosed may be effectuated |
| 6985827 |
Speed measurement system with onsite digital image capture and processing for use in stop sign e |
January 10, 2006 |
| A speed measurement system for measuring speeds of vehicles, capturing images of vehicles, and detecting violation of stop sign and traffic signal laws. The system includes a laser speed detector for determining a speed of a vehicle adjacent a stop sign. When a speed is determined, the |
| 6738148 |
Upper stem diameter measurement and basal area determination device and method for utilization i |
May 18, 2004 |
| An upper stem diameter measurement ("USDM") 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 l |
| 6681195 |
Compact speed measurement system with onsite digital image capture, processing, and portable dis |
January 20, 2004 |
| 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 generate |
| 6445444 |
Self-calibrating precision timing circuit and method for a laser range finder |
September 3, 2002 |
| 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 "zer |
| 6377186 |
Industrial position sensor |
April 23, 2002 |
| 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 |
| 6339468 |
Remote sensor head for laser level measurement devices |
January 15, 2002 |
| Disclosed is an optical sensor used for remote laser level monitoring in liquid storage vessels. The sensor is mounted directly to a standard tank nipple, located on top of the vessel, by a threaded connecting means and is linked to a laser measurement device via fiber optic cabling. The |
| 6282803 |
Self calibration circuit for determining an accurate zero compensation for a fluxgate compass |
September 4, 2001 |
| A self calibrating zero compensation circuit for a fluxgate compass comprising a toroidal core; a drive winding coupled to said core, and at least one and preferably two secondary sensing windings coupled to said core comprises a continuously operating demodulator coupled to the sensing |
| 6226077 |
Self-calibrating precision timing circuit and method for a laser range finder |
May 1, 2001 |
| 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 instrument's internal central processing unit crystal oscillator. A multi-point calibration function includes the determination of a "ze |
| 6212480 |
Apparatus and method for determining precision reflectivity of highway signs and other reflectiv |
April 3, 2001 |
| An apparatus and method for measuring coefficients of retroreflectance of retroreflective surfaces such as road signs involves use of a modified light based range finder. The apparatus includes a power attenuation factor data base which relates pulse width of received pulses to power |
| 6144308 |
Tilt compensation apparatus and method for use with a monopod mounted laser range finder apparat |
November 7, 2000 |
| A tilt compensation method, circuit and apparatus utilizes a two axis tilt sensor or two single axis tilt sensors for alerting, a user and/or compensating a surveying instrument for off vertical alignment above a reference point when the instrument support is free to move about the r |
| 6073352 |
Laser bow sight apparatus |
June 13, 2000 |
| A laser rangefinder bow sight adapted for use preferably with a conventional multi-pin bow sight having a frame and a plurality of sighting pins adjustably positioned on said frame. The laser rangefinder has a housing removably fastened to the bow sight frame. The housing supports a |
| 6064330 |
Fog piercing ranging apparatus and method |
May 16, 2000 |
| An apparatus and method for accurately determining a target distance in adverse weather conditions utilizing both LASER and RADAR is disclosed. The radar signals are used to determine an approximate range which is then used as a gating window for the determination of which laser reflection i |
| 6057910 |
Self-calibrating precision timing circuit and method for a laser range finder |
May 2, 2000 |
| 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 instrument's internal central processing unit crystal oscillator. A multi-point calibration function includes the determination of a "ze |
| 6055490 |
Apparatus and method for determining precision reflectivity of highway signs and other reflectiv |
April 25, 2000 |
| An apparatus and method for measuring coefficients of retroreflectance of retroreflective surfaces such as road signs involves use of a modified light based range finder. The apparatus includes a power attenuation factor data base which relates pulse width of received pulses to power |
| 6043868 |
Distance measurement and ranging instrument having a light emitting diode-based transmitter |
March 28, 2000 |
| A circuit and apparatus for generating a light pulse from an inexpensive light-emitting diode (LED) for an accurate distance measurement and ranging instrument comprises an LED and a firing circuit. An optional pre-biasing circuit provides a reverse-bias signal to the LED to ensure t |
| 6040897 |
Remote sensor head for laser level measurement devices |
March 21, 2000 |
| Disclosed is an optical sensor used for remote laser level monitoring in liquid storage vessels. The sensor is mounted directly to a standard tank nipple, located on top of the vessel, by a threaded connecting means and is linked to a laser measurement device via fiber optic cabling. The |
| 5949529 |
Modularized laser-based survey system |
September 7, 1999 |
| A modular laser-based surveying system is disclosed which comprises a laser-based distance measuring module and a separable compass module removably coupled to the laser based distance measuring module. Each of these modules may be operated as stand alone units as each has its own po |
| 5938717 |
Speed detection and image capture system for moving vehicles |
August 17, 1999 |
| A system for automatically capturing an image of a moving vehicle and recording data parameters, such as date, time, speed operator, location, etc. on the image. A capture window that comprises a predetermined range of distances of the system from the moving vehicle can be set by the |
| 5926260 |
Compact laser-based distance measuring apparatus |
July 20, 1999 |
| A light-weight, hand-held range finding apparatus of the present invention includes signal emitting circuitry and lens for emitting signals, and signal receiving circuitry and lens for receiving reflected signals, which are positioned within a chamber of a housing. The housing includes a |
| 5889583 |
Distance measurement and ranging instrument having a light emitting diode-based transmitter |
March 30, 1999 |
| A circuit and apparatus for generating a light pulse from an inexpensive light-emitting diode (LED) for an accurate distance measurement and ranging instrument comprises an LED and a firing circuit. An optional pre-biasing circuit provides a reverse-bias signal to the LED to ensure t |
| 5880821 |
Self-calibrating precision timing circuit and method for a laser range finder |
March 9, 1999 |
| 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 instrument's internal central processing unit crystal oscillator. A multi-point calibration function includes the determination of a "ze |
| 5859693 |
Modularized laser-based survey system |
January 12, 1999 |
| A modular laser-based surveying system is disclosed which comprises a laser-based distance measuring module and a separable compass module removably coupled to the laser based distance measuring module. Each of these modules may be operated as stand alone units as each has its own po |
| 5806020 |
Laser based speed and accident reconstruction measuring apparatus and method |
September 8, 1998 |
| An apparatus is disclosed for determining, in a first speed mode of operation, speed and range of a moving object and, in a second survey mode of operation, determining direct distances to an object and automatically calculate horizontal and vertical component distances to the object. Al |
| 5790244 |
Pre-biasing technique for a transistor based avalanche circuit in a laser based distance measure |
August 4, 1998 |
| A pre-biasing technique for a transistor-based avalanche circuit which improves the initial rate of rise in the current applied through a laser diode or other light emitting device in a laser based distance measurement and ranging instrument and, therefore, the sharpness of the leading e |
| 5781147 |
Fog piercing ranging apparatus and method |
July 14, 1998 |
| An apparatus and method for accurately determining a target distance in adverse weather conditions utilizing both LASER and RADAR is disclosed. The radar signals are used to determine an approximate range which is then used as a gating window for the determination of which laser reflecti |
| 5780999 |
Voltage conversion circuit for a laser based distance measurement and ranging instrument |
July 14, 1998 |
| A voltage conversion circuit for transforming an input voltage level at an input voltage node to a relatively higher output voltage level at an output voltage node with respect to a common reference voltage node includes an inductor coupling the input voltage node to the output voltage |
| 5715045 |
Countermeasure detecting circuit, and associated method, for a laser speed detecting apparatus |
February 3, 1998 |
| A countermeasure-detecting circuit, and associated method, for a laser speed detector. Countermeasures taken at a moving target, such as a vehicle, to interfere with operation of the laser speed detector are detected. When countermeasures taken at the moving target are detected, the |
| 5703678 |
Self-calibrating precision timing circuit and method for a laser range finder |
December 30, 1997 |
| 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 instrument's internal central processing unit crystal oscillator. A multi-point calibration function includes the determination of a "ze |
| 5696705 |
System and method for reconstruction of the position of objects utilizing a signal transmitting |
December 9, 1997 |
| A system and method for data entry and retroactive reconstruction of the relative position of features and objects, in particular with respect to scenes such as transitory occurrences, utilizing a signal transmitting and receiving distance determining device. In a particular embodiment, |
| 5652651 |
Laser range finder having selectable target acquisition characteristics and range measuring prec |
July 29, 1997 |
| A laser based range finder which may be inexpensively produced yet provides highly accurate precision range measurements has a number of user selectable target acquisition and enhanced precision measurement modes which may viewed on an in-sight display during aiming and operation of the |
| 5617199 |
Device, and associated method, for determining distances between moving objects |
April 1, 1997 |
| A device, and an associated method, for determining separation distances separating motor vehicles travelling along a roadway. A separation distance separating the motor vehicles is calculated responsive to targeting the vehicles with a laser range finder and determining the speeds o |
| 5612779 |
Automatic noise threshold determining circuit and method for a laser range finder |
March 18, 1997 |
| An automatic noise threshold circuit and method automatically sets an operating threshold for a signal receiving section of a laser pulse transmitting device such that a constant noise pulse firing rate is output from a detector to provide maximum return signal sensitivity and enable |
| 5574552 |
Self-calibrating precision timing circuit and method for a laser range finder |
November 12, 1996 |
| 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 instrument's internal central processing unit crystal oscillator. A multi-point calibration function includes the determination of a "ze |
| 5539513 |
System and associated method for determining and transmitting positional data utilizing optical |
July 23, 1996 |
| A system including a laser survey instrument for determining positional data of a selected target. The laser survey instrument generates optical pulses which are transmitted to and reflected from the selected target back to the survey instrument. The survey instrument determines the rang |
| 5528518 |
System and method for collecting data used to form a geographic information system database |
June 18, 1996 |
| A portable data acquisition device, including a position-determining device and data collector, determines and stores positional data associated with objects positioned in a geographical area within sight of the device. Data representative of attributes associated with the objects are al |
| 5521696 |
Laser-based speed measuring device |
May 28, 1996 |
| A laser speed detector is described which includes a laser rangefinder which determines the time-of-flight of an infrared laser pulse to a target and a microprocessor-based microcontroller. The device is small enough to be easily hand-held, and includes a trigger and a sighting scope for |
| 5418609 |
Apparatus and method for mounting a range finding instrument to a theodolite telescope |
May 23, 1995 |
| An apparatus and method for mounting a range finding instrument to a theodolite telescope incorporates the necessary geometry to enable a linear spring assembly to be able to accurately balance the mass of the range finder and theodolite combination rotating in a vertical plane about |
| 5359404 |
Laser-based speed measuring device |
October 25, 1994 |
| A laser speed detector is described which includes a laser rangefinder which determines the time-of-flight of an infrared laser pulse to a target and a microprocessor-based microcontroller. The device is small enough to be easily hand-held, and includes a trigger and a sighting scope for |
| 5307139 |
Apparatus and method for detecting leaks in packages |
April 26, 1994 |
| This invention detects leaks in small, hermetically sealed packages, especially microchips or other packages of electronic circuits. The invention includes a procedure for detecting fine leaks, and a somewhat different procedure for finding gross leaks. To detect gross leaks, one pla |
| 5257088 |
Apparatus and method for nondestructive inspection of a vehicle |
October 26, 1993 |
| This invention tests a vehicle, such as an aircraft, using nondestructive interferometry. An interferometer detects movements in the vehicle surface due to stress. One applies such stress by pressurizing the vehicle. In one embodiment, a hood housing the interferometer attaches to the ve |
| 5146289 |
Nondestructive testing using air-coupled acoustic excitation |
September 8, 1992 |
| An object is tested for defects by interferometry, by comparing images of the object taken under stressed and unstressed conditions. The stress is applied by perturbing the object with acoustic waves, produced by a speaker directed towards the object, without any mechanical coupling to |
| 5094528 |
Apparatus and method for performing electronic shearography |
March 10, 1992 |
| Two laterally-displaced images of a test object interfere with each other to form a shearogram. Two shearograms, taken while the object is unstressed and stressed, respectively, are compared electronically to yield a composite interference pattern. According to the invention, each sh |
| 5091776 |
Apparatus and method for enhancing the quality of a video signal produced by electronic shearogr |
February 25, 1992 |
| The purpose of the present invention is to improve the quality of a video signal generated by the method of nondestructive testing known as electronic shearography. In electronic shearography, two laterally-displaced images of a test object are made to interfere, and the interference |
| 5082366 |
Apparatus and method for detecting leaks in packages |
January 21, 1992 |
| This invention detects leaks in small, hermetically sealed packages, especially microchips or other packages of electronic circuits. The invention includes a procedure for detecting fine leaks, and a somewhat different procedure for finding gross leaks. To detect gross leaks, one pla |
| 4506945 |
Hologram apparatus for detecting flaws with developing chamber |
March 26, 1985 |
| Hologram apparatus for detecting flaws has a photographic station for supporting a photosensitive medium. The photographic station together with the photosensitive medium forms a developing chamber with a transparent face having a depth in the range of from about 0.005" to about 0.125, |
| 4462668 |
Hologram apparatus for detecting flaws with developing chamber |
July 31, 1984 |
| Hologram apparatus for detecting flaws has a photographic station for supporting a photosensitive medium. The photographic station together with the photosensitive medium forms a developing chamber with a transparent face having a depth in the range of from about 0.005" to about 0.125, |
