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7428472 |
Monitoring activity of a user in locomotion on foot
A device supported by a user while the user is in locomotion on foot during an outing may monitor a performance parameter of the user. The performance parameter may comprise a pace and/or a speed...
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6536139 |
Detachable foot mount for electronic device
In one embodiment, an apparatus includes a mount, a housing, and a sensor. The mount is adapted to be disposed at least partially underneath a shoelace of a shoe, and the housing is adapted to be...
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6507799 |
Method and apparatus for reducing microprocessor speed requirements in data acquisition applications
A method and apparatus for improving microprocessor data acquisition. Noise in analog signals is removed by a low pass filter with a variable cutoff frequency controlled to cut off all frequencies...
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6418181 |
Method and measuring arrangement for determining speed of runner, walker or another moving and living object
The invention relates to a method and a measuring arrangement for determining the speed of a runner, walker or another moving and living object by a measuring arrangement. In the actual...
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6289072 |
Near-zero speed estimation method for a pulse counting speed calculation
An improved speed indication method for a sensor that develops one or more electrical pulses per unit movement of a movable part, wherein the indicated speed is based on the number of speed pulses...
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6130928 |
Acceleration processing method and apparatus
A method of determining the acceleration of a rotating body by counting the number of teeth on a rotating gear member for one or more revolutions. The method minimizes the measurement lag using an...
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5617458 |
Clock divider
The invention discloses a method and an apparatus for implementing an L phase clock in conjuction with L counters, where L is an integer, to count at a frequency scalable by L.
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RE35296 |
Full and partial cycle counting apparatus and method
Apparatus for determining the number of cycles occurring in a frequency modulated signal during a sample period, including not only the number of full cycles but any portion of a cycle, by...
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5446775 |
Motion detector and counter
A device for detecting and counting occurrences of specific human motions. The device includes structure for mounting the device to an object or a part of the human body which takes part in the...
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5305640 |
Digital flexure beam accelerometer
Acceleration is measured using an array of micro-machined elements. The array is configured so each successive element is deflected by a higher acceleration. For each acceleration there will be a...
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5123035 |
Processing circuit for signals supplied by two transducers measuring a physical parameter in the differential mode
A processing circuit is provided for signals (S 1 , S 2 ) supplied by two transducers measuring a physical quantity parameter in a differential mode and delivering a signal representative of this...
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5010769 |
Automatic pseudokeyphasor generator
A pseudokeyphasor signal control unit incorporated into apparatus for analyzing the vibratory behavior of a rotating machine in response to signals representing vibrations occuring in the machine,...
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4953095 |
Apparatus and method for measuring the frequency of a pulse signal
An apparatus for measuring the frequency of a pulse train signal and method therefor applicable to a speedometer of a vehicle are disclosed in which a count value C of at least one counter which...
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4862394 |
Drop height recorder
A drop height recorder apparatus includes a housing suitable for packaging for shipment from an origin point to a destination point, a triaxial accelerometer provides three signals to corresponding...
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4852875 |
Racquet swing training apparatus
A swing training apparatus for use with a hand held sports implement having a head and a handle with a longitudinal axis extending between the head and handle includes a housing that is mounted to...
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4722094 |
Digital rate detection circuit
A device for measuring the rate of change of speed of a machine such as a turbine engine which includes a digital counter for counting a speed signal having a frequency proportional to engine speed...
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4535462 |
Automatic velocity controlled delay circuit
An automatic velocity delay circuit utilizes the output signal of a radio equency velocimeter for determining the time a projectile takes to pass a sensor located at the muzzle end of a gun. The...
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4485452 |
Speed measurement system
A speed measurement system including a magnetic pickup positioned in proximate relation to a driven element of a gas turbine engine having a plurality of discontinuities therein. The pickup...
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4399548 |
Compressor surge counter
A surge counter for a rotating compressor is provided which detects surging by monitoring the vibration signal from an accelerometer mounted on the shaft bearing of the compressor. The circuit...
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4308452 |
Monitoring the operation of a vehicle
A method of and apparatus for monitoring the operation of a vehicle comprises sensing means in the form of one or more mercury-containing capsules to sense whether accelerative forces acting on the...
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4114450 |
Electronic recording accelerometer
A self-contained and internally powered shock, temperature and relative humidity acquisition and recording device particularly adapted for the rapid, accurate and automatic analysis of material...
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4101869 |
Vehicle warning devices
A safety device for use particularly with vehicles embodies a switching arrangement which is closed when excessive accelerative forces are applied thereto. Recording means are included to record...
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4070562 |
Acceleration/deceleration alarm system
A system for warning the driver of an acceleration or deceleration of a vehicle. A wheel sensor detects wheel rotational speeds N i and N i + 1 during two predetermined time intervals T i and T...
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4016766 |
Counting accelerometer apparatus
Counting apparatus having a transducer for measuring a certain parameter and providing an output, with filtering means for filtering the output from the transducer and decision circuit means...
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3943345 |
Digital acceleration detecting system
There is provided a digital acceleration detecting system for rotating bodies comprising a first counter for counting the number of pulse signals corresponding to the rotational speed of a rotating...
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3829785 |
CIRCUIT ARRANGEMENT FOR DIGITAL FREQUENCY MEASUREMENT
For the measurement of the unknown frequency or period of a measuring signal within a given measuring time interval the number of full cycles of the measuring signal within the measuring time...
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3798454 |
DEVICE FOR COUNTING ACCELERATIONS, MEASURING MAGNITUDES THEREOF, RECORDING AND CLASSIFYING THE SAME ACCORDING TO MAGNITUDE
An accelerometer comprising a resiliently mounted shutter element mounted tween a light source and an array of light detecting elements so that acceleration forces move the shutter element to...
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3769844 |
SOLID STATE ACCELERATION COUNTER
An accelerometer mounted to an aircraft structure supplies an electrical nal to a low-pass filter in which all frequencies above 2.5 Hz are attenuated. The signal from the filter is applied to a...
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3761917 |
GUN RUGGED RECORDER
An on-board electronic system for providing and recording acceleration prle data during the firing and launch of an artillery projectile, wherein the system comprises: means for sensing...
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3638192 |
ASYNCHRONOUS PULSE INFORMATION CLOCK PHASE IMPARTED SHIFT REGISTER DECODER
An asynchronous data to clock phase scripted shift register encoder and time/phase decoder circuit with clock phase information in the shift register in the form of two clock period wide pulses or...
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3379862 |
Device for indicating the angular velocity of a system
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3046792 |
Accelerometer with velocity and distance integrating means
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3033043 |
Digital accelerometer system
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2902232 |
Web tensioning control system
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2879053 |
Accelerometer
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2867382 |
Maneuvering loads accelerometer
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