Patent application number | Description | Published |
20140090530 | Power Tool With Circuit For Sensing Contact Between An Implement And An Object - A power tool includes a sensing circuit mounted on a printed circuit card is electrically connected to a switching power supply that supplies electrical power to the sensing circuit. The sensing circuit is not connected to earth ground to enable detection of an operator approaching a moving implement without the operator necessarily being electrically connected to earth ground. | 04-03-2014 |
20140090860 | SYSTEM AND METHOD FOR REDUCING FALSE POSITIVE DETECTION BETWEEN A HUMAN AND A MOVING IMPLEMENT IN A POWER TOOL - A method for detection of false positive condition that an object is in contact with an implement in a power tool includes sampling an electrical signal received from the implement, identifying in-phase and a quadrature components of the sampled electrical signal, identifying a magnitude of each of the samples with reference to the in-phase component and the quadrature component for the samples, detecting an object approaching the implement with reference to the plurality of samples, identifying a signal-to-noise ratio for the samples, and identifying a false positive condition for the detected object with reference to the identified signal-to-noise ratio for the identified samples. | 04-03-2014 |
20140090948 | PROXIMITY BASED THERMAL PROFILING FOR A POWER TOOL - A power tool includes an actuator that moves an implement, an infrared sensor, and a range sensor. A controller in the power tool receives temperature data and range data corresponding to objects in a region proximate to the implement. If an object in the predetermined has a temperature within a predetermined range and is identified as being within a predetermined minimum distance of the moving implement, then the controller deactivates the actuator to halt the implement. | 04-03-2014 |
20140094955 | System And Method For Identification Of Contact Between An Object And A Static Implement In A Power Tool - A method for operating a power tool detects human contact with a non-moving implement of the power tool. The method includes sampling an electrical signal that passes through the non-moving implement, identifying in-phase and quadrature phase components for the sample, identifying a first distance between the components of the sample and a centroid of a cluster of samples corresponding to human contact with the non-moving implement, identifying a second distance between the components of the sample and a second centroid identified for another cluster of samples corresponding to no human contact with the non-moving implement, and identifying human contact with the non-moving implement with reference to the first distance being less than the second distance. | 04-03-2014 |
20140094956 | System And Method For Identification Of Contact Between A Human And A Static Implement In A Power Tool - A method of operating a power tool detects human contact with a non-moving implement in the power tool. The method includes generating a series of samples of an electrical signal passing through the non-moving implement, identifying a component for each sample in the series of samples of the electrical signal, identifying a first max−min value corresponding to a first plurality of samples in the series of samples occurring during a first periodic time interval with reference to a difference between a maximum value and a minimum value identified in the components of the first plurality of samples, and identifying human contact with the non-moving implement in response to the first max−min value being greater than a first predetermined threshold. | 04-03-2014 |
20140094957 | System And Method For Identification Of Implement Motion In A Power Tool - A method of operating a power tool identifies motion of an implement in a power tool. The method includes obtaining a plurality of samples of an electrical signal that passes through the implement, identifying a parameter for the plurality of samples corresponding to a variation in values of predetermined groups of samples in the plurality of samples, updating a status for the implement with a first status indicating that the implement is not moving with reference to the identified parameter being less than a predetermined threshold, and updating a status for the implement with a second status indicating that the implement is moving with reference to the identified parameter being greater than the predetermined threshold. | 04-03-2014 |
Patent application number | Description | Published |
20080236288 | INSPECTION SYSTEMS AND METHODS FOR DETECTION OF MATERIAL PROPERTY ANOMALIES - A method for inspecting a part is provided. The method includes immersing the part in a couplant medium, delivering ultrasonic wave energy to at least one subvolume of the part using an ultrasonic transducer immersed in the couplant medium and receiving ultrasonic wave energy from the part at a fundamental frequency and at least one harmonic frequency using an ultrasonic receiver immersed in the couplant medium. The method also includes generating a nonlinear image corresponding to at least one material property variation of the part using the received ultrasonic energy and using the nonlinear image of the part to determine whether one or more material property anomalies are present in the part. | 10-02-2008 |
20080270070 | Methods and systems for computing gear modifications - A method of computing gear modifications from a gear inspection chart is provided. The method includes extracting a gear profile from the gear inspection chart. The method also includes quantifying the gear profile. The method also includes determining a gear modification based on a quantified gear profile. The method also includes qualifying a gear based on the gear modification. | 10-30-2008 |
20090249879 | INSPECTION SYSTEMS AND METHODS FOR DETECTION OF MATERIAL PROPERTY ANOMALIES - An inspection system includes an ultrasonic transducer configured to deliver ultrasonic wave energy to at least one sub volume of the part, and an ultrasonic receiver configured to receive ultrasonic wave energy from the part at a fundamental frequency and at least one harmonic frequency. Both the ultrasonic transducer and the ultrasonic receiver are located on the same side of the part in various configurations. In a method, ultrasonic wave energy is delivered to at least one subvolume of the part using an ultrasonic transducer and ultrasonic wave energy from the part at a fundamental frequency is received at least one harmonic frequency using an ultrasonic receiver positioned on the same side of the part to determine whether one or more material property anomalies are present in the part. | 10-08-2009 |
20090283569 | SYSTEM AND METHOD FOR MONITORING WELDING - A system for monitoring a weld process is provided. The system includes an ultrasonic wave generator adapted to deliver an ultrasonic signal to a target material during a weld operation. The system also includes a pair of ultrasonic receiver elements with opposite directions of polarization relative to each other, the ultrasonic receiver elements configured to receive the ultrasonic signal propagated through the target material. The system further includes an electronic circuit coupled to the pair of ultrasonic receiver elements. The electronic circuit is configured to receive respective signals from the pair of ultrasonic receiver elements; wherein the respective signals comprise the ultrasonic signal and a noise signal. The electronic circuit is also configured to output the ultrasonic signal devoid of the noise signal. The system also includes a signal processor coupled to the electronic circuit, wherein the signal processor is configured to determine a quality level of a weld created during the weld operation by extracting data corresponding to the ultrasonic signal and comparing the data to a profile that corresponds to an acceptable quality level. | 11-19-2009 |
20100158349 | METHOD AND SYSTEM FOR ESTIMATING CONTACT PATTERNS - A gear inspection system and method for a gearbox, wherein an image acquisition unit is oriented proximate the gearbox with a field of view of a section of the gears. The image acquisition unit obtains images of a gear tooth and corresponding contact pattern. In one embodiment a processing unit transforms the images to a gear tooth model so that the gear tooth image and contact pattern image matches the model gear tooth. Metrics are computed for the contact pattern, and based on threshold values, a determination is made as to whether the gearbox is acceptable. | 06-24-2010 |
20100242607 | INSPECTION METHOD FOR DETERMINING A LOCATION OF INCIPIENT DAMAGE - A method for determining a location of incipient damage of an object comprises insonifying the object at a plurality of locations using ultrasonic signals during an inspection, acquiring signals indicative of a possible damage condition from the plurality of locations of the insonified object in said inspection, determining a value for each of the locations to indicate accumulated damage by mathematically combining the acquired signals from said inspection and at least a portion of prior inspections, and comparing the values of the plurality of locations to determine a location indicating possible incipient damage. | 09-30-2010 |