摘要:
A method of operating a process a combustion analyzer having a measurement cell is provided. The method includes exposing the measurement cell to exhaust of a combustion process where fuel and oxygen are combined in a burner to produce a flame. The measurement cell is heated to a temperature above a flashpoint of the fuel. When a condition is detected, such as a fault or abnormal situation, gas is directed to the measurement cell to form a gaseous barrier between the measurement cell and unburned fuel while the detected condition exists. Once the condition abates, the gas flow is disengaged and process combustion gas measurements are provided.
摘要:
A process analytic device includes a metallic enclosure having electronics disposed therein. The enclosure has an enclosure wall with a reference surface. A plurality of operating rods is provided. Each operating rod is configured to pass through an aperture in the enclosure wall and to cooperate with the enclosure wall to provide a flame quenching pathway. A plurality of electrical switches is provided where each electrical switch is aligned with a respective operating rod, and is mounted a controlled distance from the reference surface. Each operating rod transfers movement to a respective electrical switch through the flame quenching pathway.
摘要:
A bearing block for anchoring a self-contained bearing for a moving part of a robotic manipulator to such robotic manipulator is provided, wherein the self-contained bearing has a known outside diameter. In particular, the bearing block comprises a body portion having attachment means for attaching the bearing block to the robotic manipulator, with such body portion being split into a base piece and a clamp piece along a dividing axis. A bearing race or bore is formed through the body portion and centered therewithin on the dividing axis. The bore is formed after the body portion has been split along the dividing axis, and has an effective diameter slightly undersized relative the outside diameter of the self-contained bearing to be held therewithin. Means are provided to removably attach the clamp piece to the base piece and to thereby provide relatively uniform inward compressive forces about substantially the entire outer periphery of the bearing when the clamp piece is attached to the base piece thereabout.
摘要:
Methods, systems and software are described for analyzing micro-blog messages to detect abnormal activity of interest. The system includes a clusterer for clustering micro-blog messages received over a first period of time, a classifier for scoring the clustered messages; a knowledge base, a rule generator for generating classification rules from the knowledge base; and a matcher for matching the scored messages to information requests. Methods for operating the system and its components are described.
摘要:
There is provided a backlash control rotation gear assembly for robotic applications, with such assembly comprising an input device to provide rotational force of a predetermined maximum torque. The system further includes a first drive gear which is connected to the rotational input device and a second drive gear which is connected to the first drive gear by an elastic torsion spring preloaded with a predetermined spring torque force. An output driven gear is connected to a moveable robotic part to be rotated, with such driven gear being connected to the first and second drive gears, wherein the first drive gear is driven by the rotational input device and the second drive gear is driven indirectly by the input device through the preloaded elastic torsion spring. The preloaded torque force of the elastic torsion spring maintains the intermeshing teeth of the first and second drive gears and the driven gear is loaded, substantially constant contact, thereby eliminating gear backlash normally encountered in such gear systems.
摘要:
A robotic base compartment has an interior locating surface. A plurality of pins extend squarely from the locating surface. The pins are located by pre-assembly machining and the extending pin surfaces are coated with a release agent. A robotic component plate, such as a gear-carrying plate, is assembled in the base compartment, with clearance slots surrounding the locating pins. After adjustably positioning the gear elements with one another by shifting the component plate, the slots are filled, for at least a portion, with a pourable hardenable material such as epoxy which is then allowed to harden. The components may thereafter be disassembled and reassembled without the loss of precision location. The assembly method obviates the need for manual drilling and reaming of pin holes at assembly and the attendant chip contamination that results therefrom.
摘要:
A process analytic device includes a metallic enclosure having electronics disposed therein. The enclosure has an enclosure wall with a reference surface. A plurality of operating rods is provided. Each operating rod is configured to pass through an aperture in the enclosure wall and to cooperate with the enclosure wall to provide a flame quenching pathway. A plurality of electrical switches is provided where each electrical switch is aligned with a respective operating rod, and is mounted a controlled distance from the reference surface. Each operating rod transfers movement to a respective electrical switch through the flame quenching pathway.
摘要:
Methods, systems and software are described for analyzing micro-blog messages to detect abnormal activity of interest. The system includes a clusterer for clustering micro-blog messages received over a first period of time, a classifier for scoring the clustered messages; a knowledge base, a rule generator for generating classification rules from the knowledge base; and a matcher for matching the scored messages to information requests. Methods for operating the system and its components are described.
摘要:
A stationary robotic base carries a movable robotic platform and supports a pair of vertical striker plates spaced apart by a central, elastomeric block. The striker plates are confined within a compartment of the stationary base, and extend upward into a pathway defined by a lug depending from the moving platform. The lug contacts the top portion of a given striker plate and, as the plate is struck, it tends to pivot about its bottom edge toward the other plate, compressing the elastomeric block, while the other plate is held from moving away from the block. The assembly is bidirectional, with each striker plate being yieldable toward the other as it is encountered by the moving lug. In the event that the moving element possesses more energy than the maximum stopping energy of the elastomeric block, the first encountered striker plate will pivot to such position that the lug will overtravel the striker plate and pass over the elastomeric block until it comes to rest against the stationary, nonpivoting striker plate.