729results about How to "Prevent tripping" patented technology

An augmented reality system in which video imagery of a physical environment is combined with video images output by a game engine by the use of a traveling matte which identifies portions of the visible physical environment by techniques such as Computer vision or chroma keying and replaces them with the video images output by the video game engine. The composited imagery of the physical environment and the video game imagery is supplied to a trainee through a headmounted display screen. Additionally, peripheral vision is preserved either by providing complete binocular display to the limits of peripheral vision, or by providing a visual path to the peripheral vision which is matched in luminance to higher resolution augmented reality images provided by the binocular displays. A software/hardware element comprised of a server control station and a controller onboard the trainee performs the modeling, scenario generation, communications, tracking, and metric generation.

The invention is a pad having a layer of resilient gel disposed on a layer of foam. The gel layer is preferably a silicone gel or other resilient gel such as a thermoplastic elastomer (TPE), SEBS or SEPS and the foam layer is preferably EVA foam. A soft rubber could also be used. The gel layer of the pad may have geometric cutouts such as pleats, grooves, flutings, corrugations, serrated shape, or any combination. The geometric cutouts may have a round, square, trapezoidal, triangular, rectangular, rectangular with rounded corners, half round shape or any combination. The geometric cutouts may also be hollow to further reduce gel material. The shape of the gel layer may be different or independent of the shape of any serrations or geometric cutouts on the foam layer. The pad may be flat or may be formed into a sleeve, a holder for beverage containers, a support pad, or a seat cushions. Many other uses and shapes are conceivable.

A harness-like fishing gear holder vest upon which various pouches are mounted for storing fishing supplies and caught fish. The harness includes two shoulder straps on which are attached six pockets, three on the front of each straps. The two straps are attached to a waist belt, which has two additional pouches attached to the sides. A chest strap is provided between the two shoulder straps. Two adjustable rod-holding rings for holding a fishing rod are attached to the straps. This enables the user's hands to be free for performing various other activities. A detachable line cutter and a snap hook are placed on the waist belt by looped snap bands. Pouches are attached to the shoulder straps by clamp-like clips. The device is fully adjustable, fastened with VELCRO belt and shoulder adjustment. The vest is worn by an angler while wading in water up to his chest.

The invention relates to a brushless doubly-fed motor excitation control system, which is characterized by comprising a PWM (Pulse-Width Modulation) rectifying unit, a first current sensor, a smoothing reactor, a contactor, an excitation controller and an inverter unit, an operation and display unit, an energy storage device, a BOOST reactor, a soft start circuit, a first voltage detection circuit and a second voltage detection circuit. The brushless doubly-fed motor excitation control system can always keep a speed-variable load-variable constant-frequency and constant-voltage power generation state when a brushless doubly-fed motor is at an electric operating state, the rotating speed of a brushless rotor rapidly changes and the load condition is within a larger range; and when the brushless doubly-fed motor is at the electric operating state, the brushless doubly-fed motor excitation control system can finish rapid adjustment of the rotating speed of the brushless rotor by excitation control and realizes multiple electric operating modes, such as synchronous operating, asynchronous operating and doubly-fed speed adjustment. When the load condition changes in a larger range, the brushless doubly-fed motor excitation control system can always keep the hard mechanical property of a synchronous motor. The invention also comprises the control method using the brushless doubly-fed motor excitation control system.

A system for charging an electric storage battery in an electric vehicle includes a first converter electrically connectable to a first source of AC electric power, for converting AC from the first power source to a first DC output, a second converter electrically connectable to a second source of AC electric power that is out of phase relative to the first AC power source, for converting AC from the second power source to a second DC output, and a regulator electrically coupled to the first DC output, the second DC output and the battery, for producing and charging the battery with a third DC output having a higher voltage than the voltage of the first and the second DC outputs.

An audible distance measurer object-face discriminator cognition stimulant system device housed in a handheld shaft, walking stick, belt attachment, or portable housing. The system device will capture, detect, merge, convert, process, compute and/or synthesize signals, measurements, images, objects-faces, colors, and shapes to output assistive phrases and measurements in electronic voice, to inform and make the user knowledgeable of objects and aware of surroundings and environment directly in path of movement-direction pointed, comprising in combination strategically positioned signal receivers, transmitters or satellite, embedded distance measurer sensor, digital video camera, cellular phone, radio, electronic travel aid (ETA), electronic orientation aid (EOA), position locator device (PLD), embedded restroom facility locator sensor, and embedded vehicle presence alert system (VPAS) sensor, which will generally aid sighted and visually impaired students, teachers and students of the No Child Left Behind (NCLB) Act, and more particularly, the elderly, and visually impaired military war veterans in a Right to Personal Privacy, while simultaneously providing sighted and blind-visually impaired children with an educational toy and interactive game.

An apparatus and method for detecting electrical arc faults that has reduced susceptibility to nuisance tripping. The apparatus includes a current sensor, an input sense circuit, an arcing sense circuit, a power supply, a tripping circuit, a processing unit, and an electromechanical interface. The processing unit measures multiple voltage levels provided by the arcing sense circuit during a specified number of consecutive time periods. Next, the processing unit determines the number of consecutive time periods during which the voltage levels exceeded a specified minimum value, take on successively lower or higher values, or fall outside a predetermined normal range of values. Based upon the results of this determination, the processing unit either trips the electromechanical interface to interrupt power to a load, or inhibits tripping of the electromechanical interface, thereby reducing the occurrence of nuisance tripping.

An apparatus that provides for the measurement of a person's weight via a portable remote readout located at eye-level. The weight measuring device comprises a low profile mat with weight sensors that are activated whenever someone steps on the mat. The sensors communicate a sensor weight signal to a transmitter, which in turn communicates the weight signal to a receiver preferably located at eye-level and provided with a variety of mounting means. A preferred embodiment provides for a magnet which enables mounting of the receiver on a refrigerator door. Such a location is envisioned to provide an incentive for those trying to lose weight, by providing one's current weight on the refrigerator door to avoid any unnecessary snacks.

The invention relates to a lightning protection and especially relates to a 10-35kV overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus which is suitable for a 10-35kV overhead transmission line. The apparatus is installed in parallel on two ends of a line insulator string to protect a flash-over voltage between gaps to be less than the voltage of a protected insulator string so that the apparatus is punctured prior to the protected insulator string when the power transmission line is suffered from lightning stroke. During disruptive discharging, a signal acquisition device automatically senses a lightning current signal and triggers a high speed injection gas generation apparatus. A high speed injection air flow is instantly generated so as to carry out great impact on a follow current arc in a constraint space along a vertical direction, and carry out cooling till the arc is quenched. According to the invention, a structure is simple, installation and maintenance are convenient. Through using the apparatus of the invention, when the line is suffered from the lightning stroke, a lightning current can be rapidly led to the ground and simultaneously a high speed airflow quenching power frequency follow current is generated so that electric equipment can be effectively protected and power supply reliability is increased.

The invention provides a pressure control method and control device for an air conditioner and the air conditioner. The pressure control method for the air conditioner comprises the steps that 1, therunning mode of the air conditioner is detected; 2, the air exhaust pressure and the air return pressure of a compressor in the air conditioner are detected; and 3, the rotation speed of an outer fanand an inner fan in the air conditioner is controlled according to the running mode of the air conditioner, the air exhaust pressure and the air return pressure. According to the pressure control method and control device for the air conditioner and the air conditioner, the unit running pressure is continuously detected, the rotation speed of the outer fan or the inner fan is correspondingly adjusted according to comparison of the air exhaust pressure and the air return pressure with a preset value, therefore, the unit running pressure is in an appropriate range value, and the unit jumping phenomenon caused by high-pressure protection or low-pressure protection is prevented; and the control method is high in accuracy, has no delay and is simple and reliable.

The invention relates to a device for positioning and detecting an accident well on the basis of a transient electromagnetic method. The device comprises a relief well and the accident well, an emitting electrode and a micro inertial measurement unit combination are arranged on a drill collar in the relief well at an interval, the micro inertial measurement unit combination comprises a three-axis flux-gate sensor, a gravity accelerometer and an underground receiving unit, the emitting electrode is connected with a high-power pulse generation circuit through a cable, the micro inertial measurement unit combination is sequentially connected with a ground receiving unit and a high-power power supply through cables, the high-power power supply can provide power for the high-power pulse generation circuit and the ground receiving unit, the emitting electrode receives current signals and generates a primary field, the primary field motivates an accident well sleeve to generate a secondary field, and signals received by the three-axis flux-gate sensor and the gravity accelerometer are transmitted to and processed in the underground receiving unit and are uploaded to the ground receiving unit. The device can be widely used in the processes of rescuing and detecting in the accident well, grade assessing of an accident and formulating of rescue schemes.

The invention relates to a lightning protection device and especially relates to a multi-interspace self-expanding strong-airflow arc extinguishing lightning protection device used in power transmission lines with different voltage grades. The device is installed in parallel on one side of a line insulator substring. Insulation strength of a main discharge protection gap and an auxiliary discharge gap is less than the insulation strength of the protected insulator substring so that an overvoltage generated when lightning stroke is generated on the line punctures the protection gap preferentially. When the protection gap is punctured so as to discharge, high temperature arc is generated in the auxiliary discharge gap, air is rapidly heated and expanded in a semi-closed space of the auxiliary discharge gap so that the arc is elongated and is erupted along a gas guidance hole. Simultaneously, a signal acquisition device automatically collects signals and starts a gas generation apparatusso as to instantly generate high speed airflow to extinguish the arc. The protection device of the invention has a simple structure. Installation is convenient. When the lightning stroke is generatedon the line, the lightning current can be rapidly leaked to the ground and simultaneously the high speed airflow is generated to extinguish the arc. Therefore, electric power equipment can be effectively protected and power supply reliability can be increased.

A lace or draw string fastening system can include a clamping unit and a capture element. The clamping unit can clamp onto the laces, such as shoe laces, to tighten the shoes and the capture element can capture and contain the free ends of the laces that extend from the clamping unit to prevent tripping by securing them to other portions of the laces or the article that houses the laces. The fastening system can be used in a shoe lace fastening system without the need for knot tying. The clamping unit can clamp the laces together at the top of the shoe to hold the laces tight while the capture element can contain or secure the free ends of the shoe lace to the shoe or the laces adjacent the toe to prevent tripping.

An automotive water heater having application to a windshield of an automobile, which is able to produce hot water that can be sprinkled on the windshield to melt accumulated snow and frost, in which a water heater is mainly structured from a laminated assembled heating unit side joined to a heat conducting surface of an exchange bed. Heat quantity produced by the heating unit forms a heat balance function, which transfers the heat to the exchange bed, and water flow paths are defined interior of the exchange bed. The face joining of the laminated heating units is used to facilitate maintenance of component members and allow changing of the number of heating units assembled to the exchange bed, thereby providing choice to accommodate different power requirements.

An object is to improve the operating rate. A first switch is provided in a power line connecting a power generator to a power system, and a second switch that can be opened and closed by remote control is provided in the power line between the power generator and the first switch. In the second switch, a withstand current capability is set that allows current flowing in a low-voltage event and that withstands current having a value equal to or less than a current value specified by the thermal setting of the power generator. In the first switch, a withstand current capability is set that is superior to the withstand current capability of the second switch and that withstands current having a value equal to or less than the current value specified by the thermal setting of the power generator.

A controller-based detection system configured to adaptively learn to distinguish between detected light that is indicative of an arc fault event and detected light that is not related to an arc fault event. In particular, the detection system is configured to observe the electrical power system as it is operated under various conditions to induce light events that are unrelated to arc fault events. Using the observed information about the light events that are unrelated to arc fault events, the detection system determines one or more detection algorithms. During normal operation of the electrical power system, the adaptively determined one or more detection algorithms are utilized to identify arc fault events in the electrical power system.

The invention relates to a street floor tile. The street floor tile comprises a hollow tile body, and the peripheral wall of the tile body is provided with flow guide holes; a rotary driven barrel is vertically mounted on an inner bottom plate of the tile body; the outer wall of the rotary driven barrel is provided with shifting teeth, and the inner wall of the rotary driven barrel is threaded; a reset pressure spring is mounted in the rotary driven barrel; a ratchet wheel matched with the shifting teeth externally sleeves the rotary driven barrel, and an impeller sleeves the ratchet wheel externally, coaxially and fixedly; a step plate is mounted on a top plate of the tile body and connected with the tile body through a driving rod vertically penetrating the top plate of the tile body; the driving rod is capable of freely rotating around own axis, one end of the driving rod is connected onto the step plate, and the other end of the driving rod extends into the rotary driven barrel to abut against the reset pressure spring. The street floor tile has the advantages of novel structure, functional diversification and effectiveness in prevention of splashing of water accumulated at tile joints.

The invention discloses an anti-dust ventilation waterproof device for a power distribution cabinet. The anti-dust ventilation waterproof device comprises a power distribution cabinet body, a vacuum cleaner, a dryer box, an exhaust fan, a filter screen, a flashing, a sunshade, a camera, an LED lamp, a temperature sensor and a humidity sensor. The bottom end of the power distribution cabinet body is provided with a damping plate and a moisture-proof plate. The power distribution cabinet body is provided internally with the vacuum cleaner. The vacuum cleaner communicates with a suction inlet through a suction duct. The power distribution cabinet body is provided internally with the exhaust fan. The filter screen is disposed on the side wall of the power distribution cabinet body. The rear side of the exhaust fan is provided with the dryer box. The side wall of the power distribution cabinet body is provided with the flashing. The top end of the power distribution cabinet body is provided with a support. The sunshade is disposed on the support. The inner wall at the top end of the power distribution cabinet body is provided with the camera. The top end of the power distribution cabinet body is provided with the LED lamp. The inner wall of the power distribution cabinet body is provided with the temperature sensor and the humidity sensor. The invention reduces component aging caused by over high temperature, extends the service life, prevents the dust and moisture from affecting the operation of the electronic components, and is simple in structure, easy to use and conducive to promotion.

The invention discloses an air-conditioner control system which comprises a detection device, an anti-trip control device and an air conditioner, wherein the detection device is used for detecting the total current or the total power of a current circuit in real time or at a fixed time; the anti-trip control device is used for receiving the total current or the total power of the current circuit detected by the detection device and judging whether the total current of the current circuit is greater than a preset current threshold value or not, or judging whether total power is greater than a preset power threshold value or not, and sending a power-reducing command to the air conditioner by the anti-trip control device when the total power of the current circuit is greater than the preset current threshold value or the total powder of the current circuit is greater than the preset power threshold value; and the air conditioner is used for receiving the power-reducing command sent by the anti-trip control device and performing operation at a reduced frequency or stopping operation according to the power-reducing command. The invention also discloses the anti-trip control device, the air conditioner and a computer readable storage medium. The air-conditioner control system can prevent a trip phenomenon of a circuit breaker when the household electric power is limited.