Abstract: The present disclosure relates to pressure-sensitive detection apparatus. One example apparatus includes a pressure sensor array located in a touch display screen. One half-bridge circuit is constituted in each row of the pressure sensor array. When there is a touch input signal on the touch display screen, a first half-bridge circuit and a second half-bridge circuit corresponding to a touch location of the touch input signal output signals. A deformation amount generated when pressure is applied to a first pressure sensor component in the first half-bridge circuit is less than a deformation amount generated when the pressure is applied to a second pressure sensor component in the first half-bridge circuit, and a deformation amount generated when the pressure is applied to a first pressure sensor component in the second half-bridge circuit is greater than a deformation amount generated when the pressure is applied to a second pressure sensor component in the second half-bridge circuit.

Abstract: A point level switch for industrial interface detection is described, the switch including a microwave waveguide sensor in place of the more commonly encountered vibrating fork.

Abstract: A fault current limiter, including: two inductors, a direct current circuit breaker, a shunt resistor, a first fixed resistor, and metal oxide arresters. The two inductors include wound superconducting wires. The inductors have identical number of windings and identical structure. Magnetic fluxes of the inductors are forward coupled, and the inductors are connected in parallel to form a superconducting inductor structure. The direct current circuit breaker and the superconducting inductor structure are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker. The metal oxide arresters are two in number, and are connected to two ends of the inductors in parallel.

Abstract: A fault current limiter, including: an inductor, a direct current circuit breaker, a shunt resistor, and a first fixed resistor. The inductor includes wound superconducting wires. The direct current circuit breaker and the inductor are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker.

Abstract: The invention provides a method for configuring for use a vibrating fork level switch having a dry fork frequency DFF. The method involves establishing a wet fork frequency WFF and combining this with the DFF to configure the switch for use in media of differing densities.

Abstract: An infusion pump comprises a housing (1); and a controller (3), a direct current motor (4), a transmission mechanism (6), a rotary encoder (5), and a liquid reservoir (7), which are located within the housing (1), wherein: a piston (71) is provided within the liquid reservoir (7); the transmission mechanism (6) has one end connected with the piston (71) and the other end connected with the direct current motor (4); the rotation shaft of the rotary encoder (5) is connected with the rotation shaft (41) of the direct current motor (4); the controller (3) is connected with the rotary encoder (5) and is provided thereon with a built-in clock and an input key (2) capable of receiving an external control signal. The infusion pump can freely adjust the infusion time and the infusion dose.

Abstract: An infusion pump comprises a housing (1); and a controller (3), a direct current motor (4), a transmission mechanism (6), a rotary encoder (5), and a liquid reservoir (7), which are located within the housing (1), wherein: a piston (71) is provided within the liquid reservoir (7); the transmission mechanism (6) has one end connected with the piston (71) and the other end connected with the direct current motor (4); the rotation shaft of the rotary encoder (5) is connected with the rotation shaft (41) of the direct current motor (4); the controller (3) is connected with the rotary encoder (5) and is provided thereon with a built-in clock and an input key (2) capable of receiving an external control signal. The infusion pump can freely adjust the infusion time and the infusion dose.

Abstract: The present invention provides a level sensor, preferably a level switch, which in use is mounted at the position at which a fluid level is to be monitored and uses a relatively low resolution TDR circuit to discriminate only between wet and dry states.

Abstract: A collimation lens system for converging the light from an LED into a light beam, includes a central lens aligned along the optical axis of the LED for converging inner light from the LED, the central lens including an aspheric collimation plano convex lens having a planar entrance surface and an aspheric exit surface; and a peripheral lens surrounding the central lens for converging outer light from the LED, the peripheral lens including a total internal reflection collimation lens having an entrance surface and an exit surface and including a high order aspheric total internal reflection surface for reflecting the outer light by total internal reflection. The central lens and the peripheral lens share a common focal point at which the LED may be positioned.

Abstract: A novel method to fabricate nanoscale pits on Au(111) surfaces in contact with aqueous solution is claimed. The method uses in situ electrochemical scanning tunnelling microscopy with independent electrochemical substrate and tip potential control and very small bias voltages. This is significantly different from other documented methods, which mostly apply high and short voltage pulses. The most important advantages of the present method are that the dimensions and positions of the pits can be controlled with high precision in aqueous environment so that nanopatterns of the pits can be designed, and that the operations are simple and require no instrumental accessories. Parameters, which control the pit formation and size, have been systematically characterized and show that the primary controlling parameter is the bias voltage. A mechanism based on local surface reconstruction induced by electronic contact between tip and substrate is in keeping with the overall patterns for pit formation.