31results about How to "Reduce external influence" patented technology

In a capacitance detecting circuit, changes in capacitances at intersections between a plurality of row lines and a column line are detected as voltages. The capacitance detecting circuit includes a column-line driver for driving the column line. A code generator generates code having orthogonality in chronological order. A selection synthesizer selects a certain number of row lines from the plurality of row lines by using the code and synthesizes measured voltages at the intersections between the selected row lines and the driven column line so as to output the synthesized measured voltage. A decoding computation unit separates the measured voltages corresponding to the capacitances at the intersections by performing product sum computation between the synthesized measured voltage and the code.

The present invention provides a gravity gradiometer for measuring components of the gravity gradient tensor. The gravity gradiometer comprises a housing and a gimballed support structure with at least one actuator. The gravity gradiometer further comprises at least one sensor mass arranged for movement in response to a gravity gradient. The gravity gradiometer also comprises a transducer that is arranged so that the movement of the at least one sensor mass relative to a portion of the transducer generates a transducer signal. Further, the gravity gradiometer comprises an electrical feedback loop arranged to direct an electrical signal to the actuator of the external support structure. The gravity gradiometer is arranged so that an influence of an external angular acceleration on the rotation of the housing is reduced by the actuator when the transducer generates a transducer signal effected by the external angular acceleration on the gravity gradiometer.

The invention provides a signal transmission device that transmits a signal applied to a pair of input terminals to a pair of output terminals insulated electrically from the pair of input terminals while reducing the influence of an external noise magnetic field. The signal transmission device has a pair of coils, a pair of magnetic sensors and a signal output section. Each of the coils is connected between the pair of input terminals. Each of the coils generates a magnetic field respectively in response to the input signal applied between the pair of input terminals. A direction of the magnetic field generated by one of the coils is opposite to a direction of the magnetic field generated by the other of the coils. Each of the magnetic sensors corresponds to one of the coils exclusively. Each of the magnetic sensors detects the magnetic field generated by the corresponding coil, and outputs a detection signal in response to the detected magnetic field. The signal output section outputs an output signal to the pair of output terminals. The output signal corresponds to a difference between the pair of detection signals outputted by the pair of magnetic sensors. In the difference, the signal component caused by an external noise magnetic field is canceled. On the other hand, in the difference, the signal component caused by the input signal applied between the pair of input terminals are doubled with respect to the input signal. Thereby, the signal output section outputs the output signal with high S/N ratio.

An electrostatic capacitance detection circuit includes a charge amplifier that has an operational amplifier in which a capacitor is provided on a feedback path, and into which a signal including detection of electric charge of an inter-electrode capacitor of a sensor electrode and electric charge due to an external noise, and a selection switch that can switch a direction of a capacitor that is connected to input and output terminals of the charge amplifier through a feedback path that switches the direction of the capacitor depending on a direction of electric charge flowing in from a detection-side electrode of the sensor electrode, due to a drive signal applied to the sensor electrode.

A circuit breaker for overcurrent protection and earth leakage protection includes a main housing, a circuit board, a zero-phase current transformer, an earth leakage detection circuit, a trip coil, a sensitivity current-switch, an action time switch, and an earth leakage test switch. The earth leakage detection circuit, the sensitivity current-switch, the action time switch, and the earth leakage test switch are mounted on the circuit board and installed in the main housing.

A circuit for generating an output signal, which depends on a physical useful quantity includes means for detecting the physical useful quantity, wherein the means for detecting is arranged to generate an output signal, which depends on the physical useful quantity, a control signal for the means for detecting and, with an unchanged control signal, on an external control quantity. The circuit further includes sensor means for detecting the external disturbing quantity and for providing a sensor signal, which depends on the external disturbing quantity and means for processing the sensor signal to influence the control signal dependent on the sensor signal such that the influence of the external disturbing quantity on the output signal is reduced.

A superconducting X-ray detection apparatus is provided; wherein a structure is made, where in an end portion of the superconducting X-ray detection apparatus, which comprises a superconducting X-ray detector, low-temperature first-stage amplifier and sensor holder, influence of disturbance noise on output from the detector is minimized, and connection of wiring can be easily made. In addition, a superconducting X-ray analyzer using the apparatus is provided. A stacked structure, in which the superconducting X-ray detector is mounted in a three dimension on the low-temperature first-stage amplifier, is made.

An electroacoustic transducer comprises a carrier portion, a diaphragm supported by the carrier portion, an electrode portion opposed to the diaphragm at a predetermined interval, and a housing accommodating the diaphragm and the electrode portion, wherein the carrier portion has a saucer-like shape, at the bottom surface of which a plurality of upstanding posts are provided, and wherein the upper surface of the periphery of the carrier portion and the upper end surfaces of the posts are in the same plane, the diaphragm is bonded to the surface of the periphery of the carrier portion and the end surfaces of the posts, and the electrode portion is fixed to the end surfaces of the posts which are covered by the diaphragm with spacers interposed therebetween.

An electric power system includes a variable-frequency drive and a control module. The variable-frequency drive includes a first power converter, a second power converter and at least one energy storage module. The first power converter is connected between a DC bus and a power terminal. Moreover, electric energy is transferred between the first power converter and the power terminal at a first power. The second power converter is connected between the DC bus and an electric/kinetic energy conversion device. Moreover, electric energy is transferred between the second power converter and the electric/kinetic energy conversion device at a second power. As the second power is dynamically changed, the control module controls a charge/discharge operation of the at least one energy storage module. As a consequence, the operational change of the electric/kinetic energy conversion device is reversely compensated.

The invention belongs to the technical field of cables and particularly relates to a submarine high voltage cable which is formed by a conducting unit, a metal shielding layer, a water-resistant layer, an inner sheath, an armoring layer, an outer sheath and an outer sheath protective layer which are arranged sequentially from inside to outside. The conducting unit is formed by a conductor, an insulation layer, an insulation shielding layer and a conductor protective layer. On one of any cross sections, the circle center of the conductor coincides with the circular center of the insulation layer, the diameter of the insulation layer is 1.5 to 5 times that of the conductor, and the minimum value of the thickness of the insulation layer is 1.5mm. Filling rope groups and reinforcing part groups are distributed outside the inner sheath in an alternating mode and cling to the inner sheath. The outer sheath protective layer is made of polyamide. The insulation layer is made of organosilane crosslinked polyethylene or special materials. The invention further discloses a manufacturing method of the submarine high voltage cable. The submarine high voltage cable mainly has the following advantages of being proper in mechanical performance redundancy, capable of saving resources, high in abrasion resistance, water seepage resistance, sea water resistance and shielding performance and good in high voltage transmission.

The invention discloses a method for repairing cultivation soil by using a semi-matrix covering, and belongs to the field of agricultural planting. The method comprises the following steps that S1, surface soil of a cultivation tank is pretreated, wherein the soil 20-30 cm away from the ground is turned to obtain the pre-treated surface soil; S2, deep treatment of the surface soil is conducted, wherein a disinfectant is added to the filtered surface soil; S3, the cultivation tank is repaired and maintained, and the deep-treated surface soil is placed into the cultivation tank; S4, the semi-matrix covering is added, wherein the semi-matrix covering covers the surface of the cultivation tank; S5, data counting is performed, and repaired nutrient soil is obtained when the parameters of a germination test plant meet the normal plant standards. Through disinfectant application (a chemical modifier method), soil deep ploughing (a soil replacement method) and semi-matrix covering (a bioremediation method), multi-layer soil repairing is conducted, cultivation semi-soil semi-matrix repairing is conducted, the occurrence of disease and pest damage is reduced, the dead rate of plants is reduced and accordingly the annual yield is improved.

The invention relates to a short-type thermocouple calibration system. The heat conduction medium in the constant temperature field subsystem adopts pure copper material, and the pure copper is wrapped with a high-temperature-resistant alloy material. The inside of the calibration hole and the inside of the temperature control sensor hole are inlaid with high-temperature alloy material. The upper part is designed with a protective tube of ceramic material, and the top of the furnace mouth is designed with a thermostatic block sealing plate. There is a high-temperature sealant between the constant temperature block, the anti-oxidation cylinder, the constant temperature block pillar, the protective tube and the constant temperature block sealing plate. An insulation layer is designed on the top of the block sealing plate, a heating wire is arranged around the anti-oxidation cylinder, and an insulation layer is wrapped around the heating wire. Pure copper is used as the heat conduction medium, and the calibration hole and the temperature control sensor hole are equipped with a sealed inlay layer of superalloy material. The temperature measurement method that touches the bottom greatly reduces the uniformity of the axial temperature field near the furnace mouth. Currently, only There are 35mm long thermocouples for calibration, which solves the problem of difficult calibration of short thermocouples.

The invention belongs to the technical field of cables and particularly relates to a submarine high-voltage cable. The cable comprises a conductive unit, a metal shielding layer, a waterproof layer, an inner sheath, an armor layer, an outer sheath and an outer sheath protection layer. The conductive unit comprises a conductor, an insulation layer, an insulation shielding layer and a conductor protection layer. On any one cross section, the circular center of the conductor and the circular center of the insulation layer coincide, the diameter of the insulation layer is 1.5 times to 5 times of that of the conductor, and the minimum insulation layer thickness is 1.5mm. Filling rope layers and reinforcing elements are distributed on the outside of the inner sheath alternately and are attached to the inner sheath. The outer sheath protection layer is made of polyamides, and the insulation layer is made of silane crosslinked polyethylene or special materials. The invention further discloses a production method for the cable. The cable and the production method have the advantages of being appropriate in mechanical performance redundancy is, capable of saving resources, anti-abrasion, anti-water-seepage, anti-seawater, good in shielding performance and capable of transmission high voltages.

In an optical transmission module having a communication module which is freely movable in a case, when a tensile force is generated on an optical cable after connection of an optical transmission module, optical coupling surface and an optical axis center follow each other and thus stable optical transmission can be constantly performed.

A method and a device for testing an electronic appliance for determining at least one variable of a system. The electronic appliance is designed in the form of a sensor. The method includes defining an expected minimum and/or maximum value of the variable and producing an electric signal by means of the electronic appliance depending on the variable. The method also includes detecting at least one value of a parameter of the produced electric signal and defining an expected minimum and/or maximum value of the parameter depending on the defined minimum and/or maximum value of the variable of the system. A determination is made, based on whether the detected value of the parameter is greater than the minimum value defined for the parameter and/or smaller than the maximum value, whether there is a malfunction of the electronic appliance provoked by an external electromagnetic interference field.

The invention discloses a high-performance combustion gas turbine gas-exhaust system. The high-performance combustion gas turbine gas-exhaust system comprises a gas exhaust barrel, a gas exhaust towerand a heat storage device, wherein one end of the gas exhaust barrel is connected to a gas exhaust hole of a combustion gas turbine, and the other end of the gas exhaust barrel is connected to the gas exhaust tower; the heat storage device is further connected on the gas exhaust tower; the gas exhaust barrel is of a cylindrical steel plate structure with a big end and a small end; a plurality ofbumps are arranged on the outer wall of the gas exhaust barrel; a heat dissipation layer and an isolating layer are arranged on the inner wall of the gas exhaust barrel; the top end of the gas exhausttower is outwards extended to form a gas exhaust tower opening; a plurality of rainproof baffle plates are arranged on the gas exhaust tower opening from top to bottom; and the heat storage device comprises a heat storage box as well as a gas inlet tube and a gas outlet tube which are connected to the heat storage box, an electric louver valve is arranged in the gas exhaust tower, and the position, on the gas exhaust tower, of the electric louver valve is positioned between the gas inlet tube and the gas outlet tube. The high-performance combustion gas turbine gas-exhaust system is simple instructure, is high in safety, can recycle heat energy to certain extent, can reduce energy loss, and improves energy utilization efficiency.

The invention discloses multistage filtering type sewage treatment equipment. The equipment comprises a tank body, and a gas conversion device is arranged on the outer wall of the tank body. The gas conversion device comprises an anti-backflow elbow, a ventilation pipe, an activated carbon filter screen and a fan. The ventilation pipe is arranged on the outer surface of one end of the anti-backflow elbow, the activated carbon filter screen is arranged on the inner surface of the lower end of the ventilation pipe, the fan is arranged on the outer surface of the other end of the ventilation pipe, a bearing platform is fixedly connected to the inner wall of the tank body, and a compressed air pump is fixedly connected to the outer surface of the upper end of the bearing platform. According tothe multistage filtering type sewage treatment equipment, the sewage treatment capacity is improved, potential safety hazards in the sewage treatment process are reduced, meanwhile, fine treatment atthe ion degree can be carried out, the sewage treatment degree is further improved, the use efficiency is improved, and the equipment has great use prospects and brings huge economic prospects.

The invention belongs to the technical field of cables and particularly relates to a submarine high-pressure cable. The submarine high-pressure cable is composed of a conductive unit, a metal shielding layer, a water retention layer, an inner protecting bush, an armor layer, an outer protecting bush and an outer protecting bush protection layer; the conductive unit is composed of a conductor, an insulating layer, an insulation shielding layer and a conductor protecting layer, on any cross section, the circle center of the conductor coincides with the circle center of the insulating layer, the diameter of the insulating layer is 1.5-5 times that of the conductor, and the minimum value of the insulating layer thickness is 1.5 mm; filling rope groups and reinforcing piece groups are distributed outside the inner protecting bush in an alternate mode, and both the filling rope groups and the reinforcing piece groups are tightly attached to the inner protecting bush; the outer protecting bush protection layer is made of polyamide; the insulating layer is made of organosilane crosslinked polyethylene or a special material. The invention further discloses a manufacturing method of the submarine high-pressure cable. The submarine high-pressure cable and the preparation method thereof have the advantages that mechanical property redundancy is more proper, more resources are saved, wear resistance is better, water seepage performance is better, seawater resistance is better, shielding performance is better, and high voltage can be transmitted better.