Abstract: The present invention is directed to an improved logging apparatus. The logging apparatus includes transmitters, receivers, and a controller member. The controller member is utilized to selectively energize the transmitters to generate an interrogation signal. The receivers are utilized to obtain measurements of the interrogation signal. The controller member can be utilized to substantially simultaneously process the recorded samples--such as by mathematically combining a plurality of measurements in order to obtain a measure of an attribute value which relates to at least one of the wellbore and surrounding formation.

Abstract: An automotive electronic circuit analyzer that plugs into an automobile's electronic control module is disclosed. The disclosed analyzer includes positive and negative load sensing cells each having a series resistor coupled to an ECM load via the ECM connector and having an LED transistor for conducting current when the ratio between the load and the series resistor exceeds a predetermined value. A regulated power circuit for sinking current from the positive load sensing cells and for supplying current to the negative load sensing cells includes a timing circuit for controlling the active power pulse width so that the LEDs are illuminated with high frequency, short duration power pulses to indicate a shorted load.

Abstract: An electronic monitoring system provides an actual value sensor which detects an actual value of a component to be monitored, e.g., the rotational speed of a drive motor, and emits actual value signals, a signal path along which actual value signals are transmitted, and an evaluating unit connected to the signal path. The signal path is divided into two separate but parallel signal paths along which the actual value signals emitted by the actual value sensor are processed differently. For example, the actual value signals emitted by the actual value sensor may undergo digital signal processing along one path and analog signal processing along the other path. The actual value signals transmitted along the two paths are received by the evaluating unit which compares the signals and initiates appropriate steps if there are deviations between the two sets of actual value signals.

Abstract: A measuring method for vehicles equipped with an internal combustion engine, the engine including a starter battery and a driven staffer motor used when an attempt is made to start the engine, is disclosed. According to the method, a voltage across a measuring shunt inserted in a current circuit between the battery and the starter motor is repeatedly measured, at a sampling rate, during each revolution of a crankshaft of the engine during activation of the starter motor. Corresponding values of a current delivered from the starter battery to the starter motor are derived from voltage measuring results. Values of the current are registered in a memory of a measuring computer. The registered values are used to establish a status of the combustion engine and its starting system. A value of a derivative of a rotational speed of the combustion engine crankshaft is obtained from the registered values.

Abstract: The present invention relates to a sensor system that uses two sensors for measuring and monitoring of angular position of a member in two or three axes. The sensor system of the present invention preferrably uses a pair of magnetoresistive sesors that are maintained in the same plane and in orthogonal configuration with respect to each other, and which reference their position according to the Earth's magnetic field or a magnetic field provided by a user. Accordingly, the sensors of the present invention are useful for a variety of purposes, including, virtually any application that requires monitoring and measurement of any combination of roll, pitch, and yaw.

Abstract: A device for measuring the thickness of a layer of coating on a metal surface is disclosed. The device includes a housing, a first magnetic probe mounted on the housing for measuring the thickness of the layer on a metal substrate containing iron, and a second eddy current probe mounted on the housing for measuring the thickness of the layer on a metal substrate which does not contain iron. The first and second probes are physically separated from each other on the housing. A calculating circuit receives the output of one of the first and second probes and calculates the thickness of the layer as a function of the output of the one of the first and second probes. A display is coupled to the calculating circuit for displaying the thickness of the layer being measured.

Abstract: Apparatus and method for detecting rotation of a shaft include a first antenna for transmitting electromagnetic energy into the shaft, a second antenna disposed for rotation with the shaft for modulating electromagnetic energy passing through the shaft in relation to the shaft rotational speed, and a detector for detecting the modulated electromagnetic energy that passes through the shaft.

Abstract: In a snap-in type spark plug voltage probe device, the insulator base has an upper half and a lower half, both ends of which are integrally connected by means of a flexible portion. The upper half and the lower half have a plurality of grooves in which spark plug cables are placed. The upper half and the lower half are joined together by the flexible portion when in a closed position. The upper half has an opening to receive a protrusion provided on the lower half of the insulator base to maintain the upper half of the insulator base along the grooves, providing static capacity between the electrode layer and the spark plug cables when voltage is applied across the spark plugs. A lead wire electrically connects the electrode layer to a microcomputer so as to analyze the burning condition based on the static capacity between the electrode layer and the spark plug cables.