75results about How to "Detection of leakage" patented technology

A method of managing and conserving water at a point of use, by installing a control panel and at least one electrically operated valve in a plumbing line, which valve can monitor at least pressure and flow rate, and allow the calculation of the total volume of flow in a particular line. The valve being controlled by a controller programmed to prevent water loss by monitoring the pressure and flow rate in a particular line to detect and prevent water consumption outside controlled parameters by shutting off the valve if the system detects an uncontrolled flow, such as faucet being left on, or a leaky toilet cistern, or the water flow in a zone exceeding a predetermined quota.

A hydraulic vehicle brake system in which normal service brake operation can be carried out by using external hydraulic energy, and in the event of a lack of external hydraulic energy, auxiliary brake operation by muscle power is possible, with a hydraulic transmission that comes from a master cylinder that can be actuated by means of the brake pedal. The external hydraulic energy is stored, for example, in an accumulator with a gas buffer, which can lead to a gas content in the hydraulic fluid for the service brake operation. The system includes a dual-circuit master cylinder associated with those wheel brakes of a vehicle axle that make a higher contribution to the vehicle deceleration and at the same time, cylinder / piston devices are installed between these wheel brakes and their associated service brake valves for the purpose of preventing hydraulic fluid from getting into these wheel brakes from the external energy source. The advantage is that neither gas nor air is carried into the wheel brakes where it could lead to the formation of bubbles in the event of a pressure drop and would be disadvantageous for an auxiliary brake operation by the master cylinder. The cylinder / piston devices increase the operational safety of the vehicle brake system when braking by muscle power.

A method for detecting memory leakage of a linked list in a running program, includes saving current size of the linked list as a new maximum size of the linked list when a new element is added to the linked list that causes the current size of the linked list to exceed a former maximum size of the linked list, determining whether a first pre-determined period of time has elapsed from when the liked list was created, and determining whether the new maximum size of the linked list exceeds the former maximum size of the linked list during a second pre-determined period of time.

A method for testing the operability of a tank shutoff valve of a fuel tank system which is controlled by valves includes performing defined triggering of the tank shutoff valve and simultaneous introduction of an overpressure or partial vacuum into the fuel tank system via a pressure source, and the operability of the tank shutoff valve is determined on the basis of a variable which characterizes the introduction of the overpressure or partial vacuum.

A liquid-transferring hose of single-carcass configuration, with a rubber tube layer, main pressure-resistant cord layer and cover rubber layer, in this order from the inside, wherein a transponder installed between the rubber tube layer and cover rubber layer transmits and receives waves of specific frequency, which are attenuated by at least -60 dB when passing through liquid to be transferred, and transmits a response signal on receiving the above waves. This design prevents the response signal transmitted by the transponder, when it is covered with leaked liquid, from being detected, to tell occurrence of liquid leakage, allowing liquid leakage to be easily detected during the initial stage.

A leak inspection device comprises: a vacuum chamber 2 for accommodating a product 1; a vacuum pump 3 for discharging air from the vacuum chamber; a He gas bomb 4 for supplying and charging He gas into the product; and a leak detector 5 for detecting He gas which has leaked out from the product, wherein a heater 8 is provided on an outer wall of the vacuum chamber and an inner surface temperature of the vacuum chamber is maintained to be higher than the temperature of the outside air. Due to the above constitution, moisture contained in the atmosphere is not attached onto the inner surface of the vacuum chamber.

Computer-implemented methods, systems, and software of detecting leaks, for example, in a pipeline that conveys a liquid or gas. Embodiments include inputting into a computer system a first set of data acquired (e.g., from the pipeline) during (e.g., normal) operation (e.g., of the pipeline), acquiring a second set of data (e.g., from the pipeline) while simulating leaks (e.g., from the pipeline) by releasing quantities of the liquid or gas (e.g., from the pipeline) from multiple locations (e.g., along the pipeline), inputting into the computer system the second set of data, and training the computer system to detect the leaks (e.g., from the pipeline) including communicating to the computer system that no leaks existed while the first set of data was acquired and communicating to the computer system that leaks existed while the second set of data was acquired.

An electrical leakage detection apparatus for a fuel cell includes a voltage detector that detects a voltage applied to coolant in a fuel cell; an electrical leakage determining portion that determines that electrical leakage has occurred when the voltage detected by the voltage detector is equal to or higher than a voltage threshold value; a resistance value detector that detects a resistance value of the coolant in the fuel cell; and a correction portion that corrects the voltage threshold value such that the voltage threshold value is increased with an increase in the resistance value detected by the resistance value detector.