A processing system for use in an aircraft display system, or other applications, comprises two parallel lanes. Nominally-identical input signals from sensors are supplied to the input of a first processor in each lane which produces display driving signals that are supplied to respective displays. The display driving signals are also supplied to a second processor in the same lane and to a third processor in the other lane. The second and third processors perform inverse functions on the displa...

The operation of an engine or other assembly is monitored by detecting the sound it makes and deriving from this, in conjunction with its speed, temperature and control settings, a multi-dimension condition vector. The vector changes during operation of the engine and is supplied to a processor which continuously builds a model of the engine at different stages of operation such as by a sequence-learning neural net or by hidden markov model when an atypical condition vector is received, the proc...

An aircraft has several ultrasonic phased arrays acoustically bonded to parts of its structure to be monitored. The arrays are energized to produce an ultrasonic beam that scans the structure in two planes. A monitor receives the output from the arrays produced by reflection of energy from discontinuities within the structure. When there is a change in these outputs, the monitor signals a pilot display unit and a flight control system such that the aircraft flight envelope can be restricted to m...

The invention provides apparatus and methods which facilitate movement of an instrument relative to an item or location being monitored and/or the item or location relative to the instrument, whilst successfully excluding extraneous ions from the detection location. Thus, ions generated by emissions from the item or location can successfully be monitored during movement. The technique employs sealing to exclude such ions, for instance, through an electro-field which attracts and discharges the i...

Monitoring system particularly for detecting the presence of moving persons in a monitored area. This system comprises two detection stages 2 and 22, two processing stages 3 and 23 and a selective switching-on stage 4 which the two groups of stages 2, 22 and 3, 23 have in common. Each one of the detection stages 2 and 22, which comprise cameras 7 and 27, respectively, send field signals to the associated processing stages, these signals corresponding with the observed images. Each processing sta...

Monitoring equipment including means for receiving a measurement result indicating the patient's blood glucose level, and for staring it in a first memory means. In order to improve and facilitate the treatment of the patient, the monitoring equipment further includes means for receiving data concerning the patient's diet, medication and physical strain, and for storing it in the first memory means, data processing means for calculating a predictive value on the basis of the data stored in the f...

Monitoring circuit for monitoring a voltage, comprising a coil, which is incorporated in a first current branch to be connected to the voltage to be monitored, and an auxiliary relay, the actuating winding of which is incorporated in a second current branch connected in parallel to the first current branch. In the first current branch a first make contact of the auxiliary relay is connected in series with the coil. In the second current branch a first resistor is connected in series with the act...

A tape switch near the edge of a bed frame closes a warning signal circuit when the weight of a patient near the edge of the bed presses on an actuating switch arm that is cantilevered from the bed frame.

A system for monitoring the operational status of lamps remote from the view of a vehicle operator is disclosed comprising a visual indicator and means coupling a source of electrical energy to the lamp to be monitored which is responsive to the contemporaneous application of voltage to the coupling means and flow of current therefrom to the lamp to energize the monitor. In a preferred embodiment a plurality of monitor lamps are provided on an automobile dash board to provide the driver with vis...

A system is provided for monitoring a series connection of a plurality of contacts across a voltage source, by responding as the contacts drop out to generate a binary coded display signal indicative of the initial contact to drop out. The system includes a detector connected in parallel across each contact to generate a detector output signal in response to the dropping out of its associated relay contact. A binary logic system, electrically isolated from the contacts and detectors, is responsi...