摘要:
A pressure sensor including a housing extending along an axial line, a diaphragm fixed to a front-end side of the housing, a piezoelectric unit disposed in a hole in the housing and including a piezoelectric element, a transmission member that transmits deformation of the diaphragm to the piezoelectric unit, and a guide member having a through hole extending along the axial line and surrounding the piezoelectric unit in the through hole. (SL/AL)≤0.26 is satisfied in the cross section perpendicular to the axial line passing through the piezoelectric element, where SL is the maximum value of the distance in the radial direction between the center of the through hole and the center of the piezoelectric element and AL is the maximum value of the distance in the radial direction between the outside surface of the piezoelectric element and the center of the through hole.
摘要:
Disclosed herein are an integrated monitoring CCTV, an abnormality detection apparatus, and a method for operating the apparatus. The abnormality detection apparatus includes a monitoring information collection unit for collecting monitoring information that includes location information, sound information and time information of a monitoring area from at least one integrated monitoring CCTV including multiple microphones; and an abnormal sound determination unit for determining whether an abnormality has occurred in the monitoring area, based on the sound information of the monitoring area, wherein the abnormality detection apparatus further comprises an explosion occurrence determination unit for, based on information about installation locations and installation directions of multiple integrated monitoring CCTVs transmitted from the multiple integrated monitoring CCTVs, generating a sensor matrix map for the multiple integrated monitoring CCTVs and calculating a location of occurrence of an abnormal sound based on the sensor matrix map when the abnormal sound occurs.
摘要:
A first housing of a first connector being fitted to a second housing of a second connector includes first and second rotation check lock portions. A third housing of the first connector includes rotation rail portions with first and second rotation prevention walls. The first rotation prevention wall allows rotation of the first rotation check lock portion beyond the first rotation prevention wall in one rotational direction, and does not allow the rotation beyond the first rotation prevention wall in the other rotational direction to blocks the rotation at a rotational position of 180 degrees or more. The second rotation prevention wall does not allow rotation of the second rotation check lock portion beyond the second rotation prevention wall in the one rotational direction to block the rotation at a rotational position of 180 degrees, and allows the rotation beyond the second rotation prevention wall in the other rotational direction.
摘要:
A turbine is provided and includes a rotor, which is rotatable about a centerline thereof, a sensor to measure a condition at a point of measurement interest defined on the rotor at a radial distance from the centerline, a communication system by which condition measurements are transmittable from the sensor to a non-rotating recording system and a probe holder to secure the sensor and a portion of the communication system on the rotor proximate to the point of measurement interest.
摘要:
A component adapted to transmit a dynamic pressure signal from a high temperature environment to a location where it can be measured without causing significant attenuation of the signal. In particular, the component provides for a dynamic pressure signal transmission in the manner that will not result in the formation of condensation in the measurement system and thus eliminates the need to periodically purge condensate from the system.
摘要:
A method for attaching a sensing device to a substrate at a pre-determined distance from the substrate is provided. The method preferably includes providing a compliant adhesive and depositing a first layer of the compliant adhesive onto the substrate, curing the first layer of the compliant adhesive, depositing a second layer of the compliant adhesive directly onto the first layer of the compliant adhesive, inserting the sensing device into the second layer of the compliant adhesive and curing the second layer of the compliant adhesive.
摘要:
A circuit for the generation of a deflecting voltage for the time-base deflection of an oscilloscope, which deflection is proportional to the speed of an engine and including a sawtooth generator controlled by the input pulses of a speed sensor on the engine. A variable attenuator regulates the slope of the sawtooth generator deflecting voltage so as to vary the frequency of the sawtooth voltage in accordance with the repetition rate of the engine ignition signals.
摘要:
In an internal combustion engine which includes a combustion pressure sensor incorporated glow plug and sensor nonincorporated glow plugs, a first plug regression line Lp1 and the second plug regression line Lp2 are in such a relation that, at any temperature Tx within the temperature range Tr, a second voltage Vp2x is lower than a first voltage Vp1x; the resistance of a second electricity supply line is greater than the resistance of a first electricity supply line; and a first section regression line and a second section regression line are in such a relation that, at any temperature Tx within the temperature range Tr, an overall voltage deviation |Vc1x−Vc2x|, which is the absolute value of the difference between a third voltage Vc1x and a fourth voltage Vc2x, is smaller than a first-second plug voltage difference (Vp1x−Vp2x).
摘要:
A method for controlling a stroke velocity in a pump includes using a sensor to detect a start of a pump stroke and an end of the pump stroke. A stroke time is calculated, the stroke time being a time period between the start of the pump stroke and the end of the pump stroke. The stroke velocity is calculated based on a stroke length and the stroke time. The stroke velocity is compared to a reference stroke velocity. A hydraulic supply pressure to the pump is increased if the calculated stroke velocity is less than the reference stroke velocity, and the hydraulic supply pressure is decreased if the calculated stroke velocity is more than the reference stroke velocity.