摘要:
A thermally insulated test chamber for performing antenna testing over a broad frequency range. An antenna to be tested is placed within the test chamber, which is constructed of non-RF-reflective styrofoam sheets surrounding the antenna on all sides. The air in the test chamber is heated or cooled, as desired, for testing the antenna over a range of temperatures.
摘要:
A method of determining the location and type of dimensional defects, particularly friction generating defects, which comprises: (a) initiating simulated operation at ambient conditions of an assembly having certain sliding or rolling contact surfaces; (b) sensing any change in the temperature of such assembly surrounding each certain sliding or rolling contact surfaces (i) with a resolution of 0.02-1.0 C.degree. (preferably 0.1-0.7 C.degree.) and (ii) during a time span of 2-10 seconds measured from such initiation to provide separated voltage signals for each location; (c) converting the signals to a digitized thermal map; and (d) comparing the sensed digitized thermal map with a reference digitized thermal map for such an assembly without defects operated during the same time span and adjusted to compensate for any differing thermal conditions. Any deviations detected by such comparison representing defects.
摘要:
The disclosed apparatus provides a universal wheeled cart for carrying electronic devices to be stress tested in a sealed environmental chamber in which the temperature is varied between high and low limits while the power to the electronic components is being turned on and off. The cart is configured to substantially fully occupy the insulated heated chamber which is provided with tracks for the wheels of the cart. In addition to a front access door for admitting the cart, the chamber is provided with a rear rectangular aperture through which a novel rectangular bustle mounted on the cart extends. The bustle support a plurality of connectors through which power is supplied to the electronic devices. Complementary power actuated electrical connectors are mounted in fixed relation to the rear aperture, and when actuated, all power connections to the electronic components are made through the bustle and standardized busses on the cart. A unique removable seal on the bustle provides an insulated closure for the rear aperture. The chamber is provided with conventional heating apparatus.
摘要:
A probe assembly for a test fixture for a heatsink, may include a thermocouple probe configured to measure a surface temperature of the heatsink. The probe assembly may include a base portion with an opening for receiving the thermocouple probe. The probe assembly may include a spring-loaded collet assembly connected to the thermocouple probe via the opening of the base portion and configured to cause the thermocouple probe to removably contact a bottom surface of a pedestal of the heatsink. The probe assembly may include a thermocouple cable connected to the thermocouple probe and configured to communicate the surface temperature of the heatsink.
摘要:
A system includes an installation that has a heating system and a device or component, wherein the system is configured to heat the device or component via a heated medium transported within the heating system, where the heating system includes a supply system within which the heated medium is supplied to the device or component, where the supply system includes at least one supply-system sensor, the heating system includes a removal system for the medium, the removal system includes at least one removal-system sensor, and where the system includes a computer device that is configured to simulate the heating system using data from the at least one supply-system sensor and/or the at least one removal-system sensor, where the computer device is configured to ascertain energy-flow information.
摘要:
Techniques for determining a thermal condition of a pipeline include identifying a pipeline that carries a fluid at a steady-state temperature, where the pipeline includes a tubular conduit that includes a bore that carries the fluid, and a layer of insulation installed over an exterior surface of the tubular conduit; changing the steady-state temperature of the fluid by applying a thermal contrast to the pipeline; based on changing the steady-state temperature, detecting a thermal gradient between the fluid carried in the bore and at least one of the tubular conduit or the layer of insulation at a particular location of the pipeline; and based on the detected thermal gradient, determining a presence of at least one of water or water vapor between the exterior surface of the tubular conduit and the layer of insulation at the particular location of the pipeline.
摘要:
A testing apparatus includes a base structure and a supporting structure rotatably coupled to the base structure. The supporting structure includes an engaging portion configured to engage a liquid-retaining article. A load cell assembly connects the base structure to the supporting structure. The load cell assembly includes a load cell configured to measure a reaction force present between the base structure and the supporting structure resulting from an imbalance of the supporting structure about an axis of rotation thereof. The reaction force corresponds to a weight of liquid that has accumulated on the liquid-retaining article following a balancing of the supporting structure about the axis of rotation thereof.
摘要:
A monitoring system that monitors at least one component of a cutting edge supported on an implement, the monitoring system comprising a monitor controller; at least one sensor in sensing communication with the at least one component, the at least one sensor configured to monitor wear of the at least one component; wherein the at least one sensor is connected to the monitor controller to communicate a sensor signal indicative of the wear of the at least one component to the monitor controller; the monitor controller including an output, wherein upon receiving a selected signal from the at least one sensor, the monitor controller is configured to communicate an alert via the output.
摘要:
An information processing device acquires operation information by a user regarding setting of the operation control information, arrays and displays, independently for each type on a setting screen, a plurality of types of setting parts corresponding to a plurality of types of control setting items included in the operation control information based on the operation information having been acquired, and generates the operation control information based on the arrayed information, and outputs the operation control information having been generated.
摘要:
Disclosed are a device and a method for measuring a fretting displacement in a power cycling of a press-pack insulated gate bipolar transistor (IGBT). The IGBT includes: a bracket; slide bars slidably mounted on the bracket and are arranged at least four along a circumferential direction of the bracket; sensors respectively slidably installed on the bracket and the slide bars; and a power cycling experiment device arranged inside the bracket.