摘要:
Gas flow rate measuring apparatus comprising resistive element disposed in a gas flow path, a gas flow rate detection circuit, and a gas temperature detection element or a substrate temperature detection element. The detection circuit detects a current flowing through the resistive element, or a voltage generated in response to the current to output a gas flow rate detection signal in accordance with a flow rate of gas flowing. The apparatus corrects characteristics of the gas flow rate detection signal on the basis of a temperature detection signal obtained from these elements and includes signal conversion means for correcting a characteristic bend displaced by more than a certain fixed amount from target characteristics.
摘要:
A gas flow rate measuring apparatus including a gas flow rate detection circuit configured to output a first analog signal of a gas flow rate of a gas; a gas temperature detection element configured to output a second analog signal of a temperature of the gas or a temperature of an integrated circuit; analog-to-digital converters for converting the analog signals into respective digital signals; a digital signal correction device comprising a map table and configured to correct a characteristic bend of the first digital signal based on the map table and the second digital signal, wherein the map table comprises correction constants arranged as lattice points, wherein a first number of lattice points in a first region of the characteristic bend of the gas flow rate signal is larger than a second number of lattice points of a second region outside the first region of the characteristic bend.
摘要:
Provided is a highly accurate, highly reliable gas flow rate measurement device that provides an enlarged temperature range over which the resolution at a high temperature and at a low temperature can be increased to achieve high accuracy no matter whether the characteristics of a gas temperature detection element are nonlinear. The gas flow rate measurement device includes a plurality of resistors that are disposed in a gas flow path, a gas flow rate detection circuit that outputs a gas flow rate detection signal in accordance with the flow rate of a gas flowing in the gas flow path by detecting a current flowing in the resistors or by detecting a voltage generated in accordance with the current, and a gas temperature detection element 1 that detects the temperature of the gas in the gas flow path. The gas flow rate detection circuit includes signal conversion means for converting a signal output from the gas temperature detection element to a signal that has a predetermined maximum output and a predetermined minimum output and is linear within a predetermined temperature range.
摘要:
Provided is a highly accurate, highly reliable gas flow rate measurement device that provides an enlarged temperature range over which the resolution at a high temperature and at a low temperature can be increased to achieve high accuracy no matter whether the characteristics of a gas temperature detection element are nonlinear. The gas flow rate measurement device includes a plurality of resistors that are disposed in a gas flow path, a gas flow rate detection circuit that outputs a gas flow rate detection signal in accordance with the flow rate of a gas flowing in the gas flow path by detecting a current flowing in the resistors or by detecting a voltage generated in accordance with the current, and a gas temperature detection element 1 that detects the temperature of the gas in the gas flow path. The gas flow rate detection circuit includes signal conversion means for converting a signal output from the gas temperature detection element to a signal that has a predetermined maximum output and a predetermined minimum output and is linear within a predetermined temperature range.
摘要:
A shaping machine system is presented. The shaping machine system includes a shaping device including at least one jig mount body for mounting a jig for supporting a workpiece, a shaping tool support body for supporting a shaping tool for shaping the workpiece, a first drive device for rotating the shaping tool, and a second drive device for driving at least one of the shaping tool support body, the jig mount body, or to change a posture of the shaping tool relative to the workpiece. The shaping machine system also includes a computer including an input unit for receiving a jig selection, a shaping tool selection, a shape data reading unit for reading shape data representing a shape of the workpiece after shaping, a shaping data producing unit for producing shaping data for controlling the first and the second drive devices.
摘要:
A thrust bearing for a turbocharger of an internal-combustion engine is made of a copper alloy including a brass matrix and a needle-like Mn-Si-based compound dispersed in the brass matrix. Not less than 50% of the needle-like Mn-Si-based compound dispersed in a region from a surface of a sliding portion of the thrust bearing to a depth of 50 μm have a major axis extending from the inside of the sliding portion to the surface. The major axis makes an angle of 30° to 150° with the surface of the sliding portion when observed in a sectional view perpendicular to the surface of the sliding portion.
摘要:
A film antenna whose antenna characteristics are unaffected by chassis is provided. A recessed groove portion 26 is formed in a ground portion 13 which is attached to a chassis 18. A first radiating element portion 14 is formed from a wall 26a on one side of the groove portion 26 to a wall 26b on the other side. A capacitive coupling piece portion 27 which is capacitively coupled via a specified gap g to the first radiating element portion 14 is formed on the wall 26b on the other side to thereby allow antenna characteristics to be unaffected by the chassis 18.
摘要:
A film antenna whose antenna characteristics are unaffected by chassis is provided. A recessed groove portion 26 is formed in a ground portion 13 which is attached to a chassis 18. A first radiating element portion 14 is formed from a wall 26a on one side of the groove portion 26 to a wall 26b on the other side. A capacitive coupling piece portion 27 which is capacitively coupled via a specified gap g to the first radiating element portion 14 is formed on the wall 26b on the other side to thereby allow antenna characteristics to be unaffected by the chassis 18.
摘要:
A heating resistor type flow-measuring device is capable of adjusting heating temperature of a heating resistor according to the ambient temperature as well as making the initial adjustment. A heating resistor, a thermoresistance, a group of the resistors, and an amplifier constitute a bridge circuit, and leading terminals of the group of resistors are connected to one of input terminals of an amplifier for amplifying an error voltage through MOS transistors. The heating temperature of the heating resistor can be changed by selecting one of the MOS transistors and turning it on.
摘要:
An information recording/reproducing apparatus includes an optical device, a photo-detector and a calculation unit. The optical device irradiates light beams, including one main beam and at least two sub-beams with respect to an information recording medium. The photo-detector receives return lights of the main beam and sub-beams to output light detection signals. The calculation unit produces a tracking error signal and a position information signal based on the light detection signals. The optical device irradiates the at least two sub-beams onto positions shifted to opposite sides of a center of the guide track, respectively, when the main beam is being irradiated onto a center of the information recording track. Thus, the apparatus produces the tracking error signal and the position information signal by utilizing a common optical system and a common signal processing system and thereby executes tracking servo control and random access processing with high accuracy.