摘要:
Modules, systems, and methods for monitoring environmental conditions, such as physical, electromagnetic, thermal, and/or chemical parameters within an environment, over extended periods of time with the use of one or more electromechanical sensing devices that include a sensing device and electronic circuitry for processing an output of the sensing device and generating a output of the module. The sensing device includes a microstructure, for example, a cantilevered beam, and at least one set of contacts configured for contact-mode operation with the microstructure in response to the microstructure deflecting toward or away from the contacts when exposed to the parameter of interest. The microstructure has a stack of layers of dissimilar materials, at least one of which has at least one property that changes as a result of curing of or absorption by the first material when exposed to the parameter.
摘要:
Systems, methods, and devices to protect electronics (36) of a downhole device (10) from overheating in high-temperature wells are provided. In one example, a method includes, while a downhole device (10) is disposed in a wellbore, providing power to first electronics (36) of the downhole device through a switch (40) and providing power to switch control circuitry (58) that controls the switch. The switch may be disposed on a first substrate (52) and the switch control circuitry (58) may be disposed on a second substrate (54). The method may also include receiving a measurement of a temperature of the downhole device (10) and, when the temperature exceeds a threshold, using the switch control circuitry (58) to open the switch to prevent power from being provided to the first electronics (36) of the downhole device.
摘要:
The invention relates to a miniature relay comprising: a first zone which is disposed face-to-face with a second zone; a first capacitor plate (3); a second capacitor plate (9) which is disposed in the second zone and which is smaller than or equal to the first plate; an intermediate space (25) between said two zones; a conductive element (7) which is disposed in the aforementioned intermediate space (25), which is mechanically independent of the adjacent walls and which can move freely through said intermediate space (25) as a function of voltages present between the plates; and contact points (15, 17) belonging to an electric circuit. According to the invention, the above-mentioned conductive element (7) closes the electric circuit by butting against the contact points (15, 17). The inventive relays can be used, for example, as an accelerometer, an airbag accelerometer, an inclinometer, a Coriolis force detector, a microphone, for acoustic applications, and as a pressure, flow, temperature, gas, magnetic field sensor, etc.
摘要:
A bi-stable microswitch (1) including a pair of contacts (4, 5) and an armature (10,11) movable between a first position and a second position to selectively break or make the pair of contacts, the armature being latched in the second position by a magnetic path including a permanent magnet (3) and a magnetisable element (7) having a first temperature, wherein the armature is resiliently biased towards the first position when latched, and is movable from the second position to the first position upon heating of the magnetisable element to above the first temperature.
摘要:
The invention concerns a microsystem, in particular for producing microswitches or microvalves, constituted on a substrate (50) and used for producing a shift between a first operating state and a second operating state by means of a heat actuated device with bi-metal switch effect. The heat-actuated device comprises a deformable element (51) connected, by opposite ends, to the substrate (50) so as to present naturally a deflection without stress relative to the substrate surface which faces it, said natural deflection determining the first operating state, the second operating state being produced by the heat-actuated device which induces, by the effect of temperature variation, a deformation of the deformable element (51) tending to reduce its deflection and submitting it to a compressive stress by buckling effect in a direction opposite to its natural deflection.
摘要:
L'invention concerne un circuit de surveillance de la température environnant ce circuit, comprenant : un élément de stockage de charges ; un élément d'évacuation de charges ; et un interrupteur thermomécanique connectant l'élément de stockage à l'élément d'évacuation, ledit interrupteur étant adapté à se fermer, sans que le circuit soit alimenté électriquement, lorsque la température excède un seuil.
摘要:
A microsystem, comprising a first static element (1), a second, movable and unattached element (2), an actuator (3) for effecting a force between the first and the second element (1, 2), which actuator (3) is designed for controlling a temperature (T1, T2) of one of the first element (1) and the second element (2). A corresponding method for positioning a second element (2) with respect to a first element (1) in a microsystem is introduced.
摘要:
A system includes a thin-film battery (50) and an activity-activated switch. The system is placed on a substrate (55) with an adhesive backing. In some embodiments, the substrate is flexible. Also formed on the substrate is an electrical circuit that includes electronics. The activity-activated switch places the thin-film battery in electrical communication with the circuit and electronics. The battery and the circuit are formed on the substrate and may be comprised of one or a plurality of deposited layers.