74results about How to "Detection malfunction" patented technology

An implantable medical device for delivering a therapeutic substance to a delivery site in a patient. A reservoir holds a supply of the fluid therapeutic substance. A catheter has a proximal end, a delivery region and a lumen extending from the proximal end to the delivery region. The proximal end of the catheter is operatively coupled to the reservoir. The delivery region of the catheter is adapted to be placed proximate the delivery site in the patient. The therapeutic substance is adapted to be delivered through the lumen to the patient. A sensing device is operatively coupled with the lumen of the catheter being capable of detecting a pressure of the therapeutic substance in the lumen. A controller is operatively coupled to the sensing device, the controller being capable of taking an action in response to the pressure in the lumen.

A capacitance type seat occupant sensor system of a vehicle includes an AC electric power source, a main electrode disposed at a seat of the vehicle to form an electric field between the main electrode and the body of the vehicle, a guard electrode disposed between a seat frame and the main electrode, a switch unit for establishing connection of the guard electrode to have the same potential as the main electrode to provide a seat occupant sensing mode, an impedance calculating unit for calculating an impedance of a sensing circuit based on the AC voltage and an amount of current flowing through the sensing circuit, a real-part-and-imaginary-part calculating unit and judging unit for discriminating an occupant on the seat based on at least the imaginary part of the first impedance. The impedance calculating unit calculates a first impedance of an electric circuit including the main electrode when the switch means provides the seat occupant sensing mode, and the real-part-and-imaginary-part calculating unit calculates the real part and the imaginary part of the impedance.

The present invention is a high-sensitivity insulation resistance detection method and circuit for an ungrounded DC power supply systems. When the ratio of the voltage of the positive bus to that of the negative bus exceeds a preset range, the DC current is injected into the ungrounded DC power supply systems. DC power supply systems have essentially some grounded stray and external capacitors, so some of the injected DC current will flow into the grounded capacitor, increasing the voltage of the fault bus and the leakage current. The proposed method increases the leakage current by the injection of DC current, so the current sensor can detect the leakage current from which the insulation resistance can be calculated. The DC current injection method can significantly improve the detection of ground insulation faults in ungrounded DC power supply systems.

A power conversion system includes a power conversion device, a connector, and a processing module. The power conversion device is connected to a power system. The attached state and the unattached state of the connector relative to a connecting port that is provided in an apparatus having a battery mounted therein can be selected. The processing module is configured to determine that a malfunction has occurred when a voltage is applied to a portion that electrically connects the connector and the connecting port in a period in which transmission of electric power with respect to the battery is stopped.

A liquid ejecting apparatus includes: a liquid ejecting unit that ejects a liquid supplied through a liquid supply path from a nozzle; a maintenance unit that performs a maintenance operation of the liquid ejecting unit; and an ejection state detecting unit that is able to detect a state inside a pressure chamber communicating with the nozzle. The ejection state detecting unit detects a state inside the pressure chamber before the maintenance operation and at least one state inside the pressure chamber during the maintenance operation or after the maintenance operation, and is able to determine malfunction of at least one of the maintenance unit and function units arranged in the liquid supply path based on a change in a state inside the pressure chamber due to the maintenance operation.

There is provided a data processing system-implemented method, system and an article of manufacture for providing a serviceability framework for autonomic resource management in a computer data centre. The data centre is monitored based on a logical representation (model) in the serviceability framework representative of the actual physical devices. The data centre logical model is constantly synchronized with the physical devices of the actual data centre where inconsistencies occur, and fast reporting is required before more problems occur. Monitoring agents associated with all the data centre devices are implemented to quickly identify and deal with problems before human intervention is required. A data centre health monitor is capable of detecting the malfunctions of typical devices and sub-systems in the data centre. For problems or failures that require drastic steps, the subsystem may be isolated and then interrogated separately from the rest of the data centre. Interruptions may be avoided by cloning a designated portion of the data centre systems for off-line trouble-shooting, thereby saving the systems from shutting down totally. A robust set of messages and trace logs including current operational status and health of the data centre may be provided for further diagnostic problem determination.

An image forming apparatus includes a heat radiation unit to emit heat by an operating power supplied to the heat radiation unit, a switching unit to supply the heat radiation unit with the operating power, a relay unit to control the operating power to be supplied to the switching unit, a malfunction detector to detect whether the operating power is being supplied to the heat radiation unit and to output a malfunction signal corresponding to the switching unit or the relay unit if the power is not supplied thereby denoting a malfunction, and a controller to output an off-signal to at least one of the switching unit and the relay unit if the malfunction signal is received from the malfunction detector.

A device for displaying flight characteristics of an aircraft is provided. The device includes a display for the selective display of flight characteristics of an aircraft, as a function of a state of credibility assigned to measurements from static pressure, total pressure and incidence sensors, configured for selectively displaying a primary set of flight characteristics comprising at least one flight characteristic coming from a measurement from one of said sensors, when the measurements from said sensors are deemed reliable, and a secondary set of flight characteristics, distinct from said primary set, comprising at least one secondary flight characteristic designed to replace a counterpart flight characteristic from the primary set, when the measurements from at least one sensor are deemed unreliable, said secondary flight characteristic being independent of any measurement by the or each sensor deemed unreliable done when the measurements from that sensor are deemed unreliable.

The embodiment is to provide a liquid crystal display device capable of detecting malfunctions. The liquid crystal display device includes pixels configured to be connected to scan lines and data lines, data pads electrically connected to the data lines, a data integrated circuit supplying data signals to the data lines through the data pads, first data transistors coupled to the data pads, and second data transistors coupled to the data lines. The first data transistors are disposed on the data integrated circuit and the second data transistors are separated from the data integrated circuit.

A method for determining a state of credibility of measurements of an incidence sensor of an aircraft is provided. This method includes at least one coherence test between incidence measurements from said incidence sensor, and the measurements of a flight characteristic of the aircraft, distinct from the incidence. The coherence test includes determining an incidence value from said incidence sensor, determining said flight characteristic of the aircraft, determining a value of at least one indicator of the coherence of the incidence value with the value of said flight characteristic, and activating a low state of credibility, in which the measurements of said incidence sensor are deemed unreliable, or an intermediate state of credibility, in which the measurements from said incidence sensor are deemed coherent with said flight characteristic, based on the value of said coherence indicator.

A print head and method that are capable of detecting a plurality of performance conditions such as a dry-fire, no-fire or clogged-nozzle condition. Pressure wave sensors within a print head are disclosed that are capable of detecting pressure waves generated by the firing of an ink expulsion mechanism. The characteristics of the pressure wave generated by the firing event (e.g., magnitude and timing) are indicative of the operating condition within the head. Multiple sensor types are disclosed.

Provided is a small and lightweight device for treating Meniere's disease and similar conditions that is transported by a patient and gives a safe and correct treatment when used by the patient. The portable device treats Meniere's disease and similar conditions by introducing pressure pulses to the ear canal so as to vibrate the auditory ossicles through the tympanic membrane. It comprises a pump unit for generating the pressure pulses, the earpiece for transmitting the pressure pulses to the tympanic membrane, and the controller for controlling the pump unit. The period, pressure, width, and frequency of the pressure pulses are adjustable.

A field device for process instrumentation comprising a measurement transducer having an analog output to which a two-wire line can be connected for transmitting an analog output signal, wherein a unit galvanically separates the processor from an analog output circuit. A read-back channel for a pulse-width modulated digital signal, which is tapped behind an element for galvanic separation, is provided for monitoring generation of the analog output signal, and a unit is provided for monitoring the analog output signal to maintain a specifiable maximum deviation from a reference signal, which is generated in the same manner as the analog output signal by low-pass filtering from the pulse-width modulated digital signal. In the case of transient signals, the monitoring unit advantageously detects error states quickly and appropriate measures for reacting to the error states can therefore be implemented in less time.

Disclosed are a condition based preventive maintenance apparatus and method for a large operation system. The condition based preventive maintenance apparatus for a large operation system comprises: a collection part for collecting sensor data from a plurality of sensors installed in a system; a feature extraction part for wavelet-transforming the collected sensor data and extracting an energy spectrum as a feature value; a calculation part for calculating a slope and an intercept of the extracted feature value; and a monitoring part for monitoring whether the system is broken or not using the calculated slope and intercept.

An oil deterioration detection apparatus includes a sensor, an evaluation circuit, and a malfunction detecting circuit. The evaluation circuit has a determination circuit. The malfunction detecting circuit has a resistor and a switch. The evaluation circuit evaluates a condition of the oil based on a normal voltage. The normal voltage is measured when the switch is opened so that the resistor is not electrically conducted. The determination circuit determines whether the sensor malfunctions based on a relation between the normal voltage and a divided voltage. The divided voltage is measured when the switch is closed so that the resistor is electrically conducted in parallel with the sensor.