A method and computer program product are provided for controlling the airflow direction through a device enclosure. A first device enclosure is positioned adjacent a second device enclosure, wherein both enclosures have an airflow pathway extending from the front to the back, and a fan for moving air through the airflow pathway, wherein the fan of the first device enclosure is a reversible rotary fan. The method automatically determines whether the first device enclosure is in a first orientation with its front facing in the same direction as the front of the adjacent second device enclosure or in a second orientation with the front facing in the same direction as the back of the adjacent second device enclosure. The airflow direction imparted by a reversible rotary fan is then controlled according to the determined orientation of the first device enclosure relative to the second device enclosure.

The positioning detection device includes a positioning detection combination, a plurality of positioning sheets, an origin position, a negative limit, a positive limit, a controller and an encoder. The positioning material moving system is provided on the basis of the positioning detection device.

Certain aspects of the present disclosure provide a method for setting a working distance of an additive manufacturing system, including: moving a deposition element towards a build surface; detecting, via a contact detection system, a contact between the deposition element and the build surface; stopping the moving of the deposition element in response to detecting the contact between the deposition element and the build surface; and moving the deposition element away from the build surface a determined working distance.

A propulsion system is provided for advancing a cable of a sewer cleaning and/or sewer inspection system, comprising a propulsion device, a measuring device for measuring the advancement of the cable, and an evaluation device. The propulsion device and the measuring device are adapted to provide a first and a second measured value of the advancement of the cable independently of one another, and the evaluation device is adapted to form a difference between the first measured value and the second measured value. A control device may be provided which adjusts the advancement based on the determined difference. A correspondingly designed method is also provided.

An articulated fluid delivery unit (FDU) is disposed to deliver fluid remotely to, for example, a mating fluid connection housing assembly provided on a wellhead. Flow iron on the FDU preferably includes at least one swivel joint rated for high fluid pressure and high fluid volume flow. More preferably, the swivel joint has an internal diameter of not less than about 5 inches and is further capable of rotation while retaining an internal pressure of not less than about 10,000 psi.

The present invention provides a method and apparatus for controlled burning of experimental solid fuel test strands. The fuel test strand is advanced by a screw attached to a computer-controlled stepper motor. The stepper motor controls the fuel test strand position via a proportional-integral-derivative (PID) control loop, adjusting velocity based on transmission of a diode laser beam located at the desired fuel surface position. This provides real-time monitoring of fuel strand position and fuel regression rate during combustion experiments.

An electromagnetic actuator device includes an actuator having an actuator coil and a tappet that can be moved in and against a longitudinal direction. The actuator device includes a sensor device having a transmitter element arranged on the tappet and a sensor element for generating a measurement signal, containing information about a current actual position of the tappet, depending on a magnetic field generated by the transmitter element. The actuator device includes a control unit with a controller, which applies a control voltage to the actuator coil for generating an electromagnetic field during operation in dependence on a position signal based on the measurement signal, so that the tappet moves into a target position. During operation, a stray magnetic field is generated by the at actuator coil, an adaptation of the measurement signal is performed to compensate for the influence on the measurement signal caused by the stray field.

Disclosed are an apparatus and method for controlling a remote-controlled excavator for preventing overload. The apparatus for controlling a remote-controlled excavator according to an embodiment of the present invention comprises: inertial sensors provided in the excavator; a communication unit for receiving a remote control signal from a remote control apparatus; and a control unit for driving the excavator in response to the remote control signal, wherein the control unit stops driving the excavator when a difference between an expected posture of the excavator estimated on the basis of the remote control signal and an actual posture of the excavator measured by using the inertial sensors exceeds an allowable value.

Disclosed are an apparatus and method for controlling a remote-controlled excavator for preventing overload. The apparatus for controlling a remote-controlled excavator according to an embodiment of the present invention comprises: inertial sensors provided in the excavator; a communication unit for receiving a remote control signal from a remote control apparatus; and a control unit for driving the excavator in response to the remote control signal, wherein the control unit stops driving the excavator when a difference between an expected posture of the excavator estimated on the basis of the remote control signal and an actual posture of the excavator measured by using the inertial sensors exceeds an allowable value.

An inspection apparatus for inspecting horizontal tubes in an industrial environment includes a drive module including a pair of wheels to engage a top tube of a vertically arranged layer of tubes, a telescoping pole, a sensor carriage assembly coupled to the telescoping pole, a lowering mechanism operationally coupled to the telescoping pole to selectively extend or retract the telescoping pole providing a selected vertical position of the sensor carriage assembly, and an encoder including a passive wheel, a spring, and a sliding coupler. The spring biases the passive wheel toward the top tube to ensure contact between the passive wheel and a surface of the top tube.