4results about "Mechanical transmission signalling systems" patented technology

This invention relates to the field of industrial safety monitoring equipment technology, and discloses an automatic overheat detection and alarm device for thermal power plants based on the principle of thermal expansion. The device includes a housing and a bimetallic strip. A vertical rod is slidably connected to the middle of the housing, and a horizontal plate is fixedly connected to the top of the vertical rod. An engaging assembly is disposed inside the housing, and the bimetallic strip is located in the middle of the engaging assembly. The bottom of the vertical rod contacts the top of the bimetallic strip. A visual warning assembly is disposed in the middle of the vertical rod, and an auditory warning assembly is disposed on the rear inner wall of the housing. The bimetallic strip deforms due to heat, pushing the vertical rod upwards, which causes a stop block to release the lock on the spring-loaded gear set, thereby releasing the stored energy of the spring to drive a hammer to continuously strike the warning bell. Simultaneously, a warning sign at the top of the vertical rod extends out of the housing, providing continuous audible and visual signals when overheating occurs, ensuring timely detection of hazards in the noisy environment of a thermal power plant.

Method for operating a haptic feedback device for persons to perceive the environment as an orientation aid and to direct attention to dangerous situations by means of haptic information elements and to trigger a tactile stimulus in conjunction with shape memory elements (4) characterized by that in a first process step, at least one shape memory actuator (2, 12) in conjunction with a tactile information element (3, 13, 14, 15) and in conjunction with at least one shape memory element (4) designed as an actuating element causes the corresponding shape memory actuator (2, 12) to perform a linear movement of the respective tactile information element (3, 13, 14, 15) by heating it, to press against a contact point of a user or at a human-machine interface to trigger the tactile stimulus, and that in further process steps, the actuation speed of the tactile information elements (3, 13, 14, 15) is adjusted to haptic information, the penetration depth of the tactile information element(s) (3, 13, 14, 15) is continuously changed depending on the haptic information, and the position and / or force of the pressure of the tactile information elements (3, 13, 14, 15) on the contact point of a person or at the human-machine interface is measured when the tactile stimulus is triggered by a sensor or by a change in the intrinsic resistance of the shape memory element (4) during the crystalline transformation takes place. that in order to achieve a combination of tactile and vibrotactile information, the movement of the shape memory element (4) is superimposed by at least one further movement of the shape memory element (4), and the further movement takes the form of a linear movement offset by 90° or an oscillating movement, or that by combining an penetrating movement with a second movement to change the position of the corresponding tactile information element (3,13,14,15) on the skin, an alternating movement of tactile information elements (3,13,14,15) and elements within an array takes place. and that in a final process step, when the shape memory element (4) cools down, the tactile information elements (3, 13, 14, 15) are returned to their initial position.

The present invention discloses a digital display torque wrench, comprising a ratchet wrench body assembly, strain gauges and a torque tube structure; in the present invention, when the ratchet wrench body assembly is loaded, the strain gauges are deformed in the torque tube structure, and deformation is converted into a corresponding torque and displayed on an LCD display screen; the overall length of the torque tube structure is adjustable to adapt to different environmental requirements, the overall torque arm length of the wrench is monitored in real time by an internal laser displacement sensor after the length of the torque tube structure is changed, and the torque value is corrected in real time based on the change of the overall torque arm length, so as to improve the accuracy of torque monitoring, and improve the adaptability to operating environment.

The application discloses a kind of based on semiconductor refrigeration and desiccant self-regeneration server cabinet, including cabinet body, sound-light alarm mechanism, heat dissipation cooling mechanism and dry dehumidification mechanism.Heat dissipation cooling mechanism simultaneously generates cold and hot airflow using semiconductor refrigeration sheet, cold air is used to cool IT equipment, and hot air is used to regenerate desiccant;Dry dehumidification mechanism realizes continuous dehumidification and self-regeneration cycle by the alternate work of double dehumidification boxes.Sound-light alarm mechanism uses thermosensitive glass tube as temperature trigger element, and automatically breaks down circuit when overheating, triggers sound-light alarm, without external power supply, high reliability.Cabinet also integrates smoke alarm, air guide heat dissipation and man-machine interaction panel, effectively prevent condensation, fire and heat accumulation.The application solves the problems of traditional cabinet, such as easy condensation in high temperature and high humidity environment, desiccant needs manual maintenance, electronic alarm failure, etc., has the advantages of energy saving, maintenance free, safe and reliable, etc., and is suitable for various harsh operating environments.