238results about How to "Change sensitivity" patented technology

In some embodiments, an oxygen concentrator may include lightweight injection molded housing components coupled to dual-pump diaphragm compressors. The oxygen concentrator may be coupled to a pressure transducer that detects a user's inhalation. The detected inhalation may signal the release of a bolus of oxygen. The sensitivity of the pressure transducer readings may be adjusted based on a detected environment. The user's breathing rate may also be determined to control the number of compressors used for increased efficiency. An ultrasonic sensor and gas flow rate meter may be used to determine an amount of oxygen being delivered to the user. Other components such as step valves and a solar panel may also be used to further conserve battery power. The oxygen concentrator may also incorporate an audio device such as a mobile phone.

A system and method for patient control of the stimulation parameters of a Spinal Cord Stimulation (SCS) system, or other neurostimulation system, provides an increased Therapeutic Ratio (TR). Measurements of the just-perceptible stimulation level and the maximum-comfortable stimulation level are made for at least two values of pulse duration and two values of pulse amplitude. A Therapeutic Ratio is determined for stimulation level control strategies based on fixed pulse duration and variable pulse amplitude, and alternatively for fixed pulse amplitude and variable pulse duration. The control strategy providing the greatest therapeutic ratio is then selected for use by the patient. In an alternative embodiment, the pulse durations at the just-perceptible and maximum-comfortable stimulation levels are measured, and the pulse amplitudes at the just-perceptible and maximum-comfortable stimulation levels are determined using a curve-fitting process. Similarly, the pulse amplitudes may first be measured and the pulse widths determined using a curve-fitting process.

A photosensor system including a photosensor array having a plurality of photosensors arranged two-dimensionally comprises a driver circuit and a readout circuit for applying signal voltages to each photosensor, and also a control circuit having a function of controlling the voltages applied to each photosensor and adjusting the sensitivity of each photosensor. During an image reading operation and a reading operation for setting the sensitivity of each photosensor, a correction signal is generated, which has an effective voltage that can adjust an effective voltage, applied to each gate electrode of each photosensor, to 0 V, or to a value that minimizes degradation of the characteristics of each photosensor. This correction signal is applied to each gate electrode.

The invention relates to the optical fiber sensor technical field, disclosing a cantilever beam-type optical fiber grating accelerometer. The accelerometer comprises an outer casing used as a support structure of the accelerometer, a support column used to fix a cantilever beam, a cantilever beam, a first lug boss and a second lug boss arranged at both ends of the upside of the cantilever beam, an optical fiber grating used to measure acceleration and a mass block arranged at one end or both end of the underside of the cantilever beam, wherein one end of the support column is fixed with the cantilever beam, while the other end is fixed with the downside surface of the accelerometer; both lug bosses are used to horizontally fix the optical fiber grating and ensures a certain space between the optical fiber grating and the cantilever beam; both ends of the optical fiber grating are respectively fixed on the first lug boss and the second lug boss on the cantilever beam with one end parallel to the surface of the cantilever beam passing through the hole on the sidewall of the accelerometer to extend outside the accelerometer; and the mass block is used to adjust the sensitivity and the natural vibration frequency of the accelerometer. The cantilever beam-type optical fiber grating accelerometer increases sensitivity and improves packaging technology.

A multi-freedom laser measuring system is composed of laser emitter, polarizing-splitting unit, 4-freedom error sensing unit, photoelectric receiver unit and signal processing unit. Said 4-freedom error sensing unit consists of quater-wavelength wave plate, optical splitter and optical reflector. The laser beam is splitted into the perpendicular mutually linear polarized light beams in two polarizing directions. The light beam received by said 4-freedom error sensing unit is splitted to two beans received by two photoelectric receiver. The linearity error of an object in two directions and the pitch angle error can be obtained after signal processing.

The invention relates to a capacitive micro-acceleration sensor with a symmetrically combined elastic beam structure and a production method thereof. The acceleration sensor comprises a symmetric center mass block, an external support frame, eight symmetric straight beams, two symmetric frame beams, a combined elastic beam structure, an upper cover plate and a lower cover plate, wherein the eight symmetric straight beams are used for connecting the center mass block with the external support frame, and the combined elastic beam structure is formed by connecting eight symmetric L-shaped beams together; and the other end of each straight elastic beam connected with the frame beams is connected to the middle or a vertex angle at the top end and the bottom end of the lateral face of the center mass block, and the other end of each L-shaped beam connected with the frame beams is connected to the inner side face of the external support frame. The acceleration sensor adopts the combined elastic beam structure which is formed by connecting the symmetric straight beams, the frame beams and the L-shaped beams together, has high symmetry and can remarkably reduce the cross-sensitivity of the sensor; and the sensor is produced by adopting a microelectronic mechanical system technology and is the capacitive micro-acceleration sensor with high sensitivity.

A magnetostrictive torque sensor includes a rotating shaft that is rotated by an applied torque, magnetostrictive films formed around the entire circumferential periphery of a surface of the rotating shaft in at least one location, sensor coils for sensing a change in impedance of the magnetostrictive films, and a torque calculation unit for calculating the torque applied to the rotating shaft on the basis of a signal relating to the change in impedance outputted from the sensor coils. In this magnetostrictive torque sensor, a width of the magnetostrictive films in the axial direction of the rotating shaft and a width of the sensor coils in the axial direction of the rotating shaft are set so as to fulfill the relationship 1<(W1 / W2)<1.35.

An oxygen concentrator may rely on a pressure swing adsorption process to produce an oxygen enriched gas stream from canisters filled with granules capable of separation of oxygen from an air stream. The adsorption process uses a cyclical pressurization and venting of the canisters to generate an oxygen enriched gas stream. The oxygen concentrator system may deliver oxygen as one or more pulses of oxygen per breath.

The invention discloses a temperature-insensitive optical fiber grating acceleration sensor, which comprises an outer casing used as a support structure of the acceleration sensor, an optical fiber grating used to measure acceleration, a shaft fixed on the front sidewall and the back sidewall of the acceleration sensor, an L-type lever arranged on the shaft and a mass block fixed on the horizontal end part of the lever, wherein one end of the optical fiber grating is fixed on the inner wall of one end of the acceleration sensor, while the other end parallelly passes through the small hole on the other end of the acceleration sensor and extends outside the acceleration sensor; the L-type lever is used to send vibration signal to the optical fiber grating connected with the lever, and the folding point of the cross part of the vertical part and the horizontal part of the L-type lever is in movable connection with the shaft; and the mass block is used to adjust the sensitivity and the natural vibration frequency of the sensor. The optical fiber grating acceleration sensor increases sensitivity and improves packaging technology.

A method and device for sensing food quality includes a detection material having an inherent sensitivity to a contaminant and changing a property in response thereto. The detection material is subjected to a modulating agent to alter the sensitivity of the detection material, so that exposure of the detection material to the contaminant causes the property to change in response to a level corresponding to the altered detection sensitivity.

An oxygen concentrator may rely on a pressure swing adsorption process to produce an oxygen enriched gas stream from canisters filled with granules capable of separation of oxygen from an air stream. The adsorption process uses a cyclical pressurization and venting of the canisters to generate an oxygen enriched gas stream. Coupling an oxygen concentration sensor to the generated oxygen enriched gas stream may allow monitoring of the purity of the produced gas.

The invention relates to a capacitive type micro-acceleration sensor with a double-sided symmetrical elastic beam structure and a manufacturing method. The capacitive type micro-acceleration sensor is characterized in that: (1) an SOI silicon wafer of a double-device layer is a substrate with an elastic beam-mass block structure; (2) a fixed upper electrode and a fixed lower electrode are respectively located on the upper and lower sides of the mass block; (3) the elastic beam is a straight beam of which one end is connected with the mass block, and the other end is connected with a support frame; (4) overload protection salient points are formed on the upper and lower surfaces of the mass block; (5) damping regulation grooves are formed on the upper and lower surfaces of the mass block; and (6) an electrode leading through hole of the mass block is located above the support frame. By adopting the wet etching self-stop technology, the elastic beam-mass block structure which is the most important in the acceleration sensor is processed and formed once in the wet etching; and the bonding of three layers of silicon wafers is realized by a silicon-silicon direct bonding method, and the electrode leading through hole of the mass block is formed on the fixed upper electrode through infrared aligned photoetching. According to the invention, the cross-axis sensitivity is reduced while the device sensitivity is improved.

An oxygen concentrator may rely on a pressure swing adsorption process to produce an oxygen enriched gas stream from canisters filled with granules capable of separation of oxygen from an air stream. The adsorption process uses a cyclical pressurization and venting of the canisters to generate an oxygen enriched gas stream. The oxygen concentrator system may include one or more flow restrictors to allow controlled release of oxygen enriched gas between the canisters.

The present invention relates to a capacitance type micro-acceleration sensor with a symmetrical and straight-girder structure and a manufacturing method thereof. The characteristics reside in that said acceleration sensor consists of a centrosymmetric quality block, an external supporting frame, eight direct elastic girders which are up-down symmetrical for connecting the quality block and the external supporting frame, an upper cover board and a lower cover board. On end of each direct elastic girder is connected to the top or the lateral of the bottom of the quality block that is parallel with the elastic girder, while the other end is connected to inner surface of the external supporting frame vertical to the elastic girder. The capacitance type micro-acceleration sensor with a symmetrical and straight-girder structure can improve the sensitivity at the same time of reducing the transversal effect remarkably. The capacitance type micro-acceleration sensor with a symmetrical and straight-girder structure is made by using the technology of a micro-electronics mechanism system and is a micro-mechanism acceleration sensor with a high performance.

An oxygen concentrator may rely on a pressure swing adsorption process to produce an oxygen enriched gas stream from canisters filled with granules capable of separation of oxygen from an air stream. The adsorption process uses a cyclical pressurization and venting of the canisters to generate an oxygen enriched gas stream. During venting of the canisters, use of oxygen as a purge gas may improve the efficiency and lifetime of the oxygen concentrator.

The invention relates to the optical fiber sensor technical field, disclosing an optical fiber grating accelerometer based on cantilever beam deflection. The accelerometer comprises an outer casing 1 used as a support structure of the accelerometer, an optical fiber grating 2 used to measure acceleration, a cantilever beam 3 with one end horizontally fixed on the third sidewall p of the accelerometer and a mass block 5 fixed at the other end of the cantilever beam 3, wherein the outer casing 1 has a first sidewall m, a second sidewall n, a third sidewall p and a fourth sidewall q; one end of the optical fiber grating 2 is fixed with the mass block 5, while the other end is parallel to the first sidewall m and passes through the hole 6 on the second sidewall n of the accelerometer to extend outside the accelerometer; the cantilever beam 3 is used to send vibration signal to the optical fiber grating 2; and the mass block 5 is used to adjust the sensitivity and the natural vibration frequency of the accelerometer. The optical fiber grating accelerometer increases sensitivity and improves packaging technology.

In some aspects, compositions and methods for identifying therapeutic targets for treatment of mitochondrial disorders are provided. In some aspects compositions and methods for identifying therapeutic agents for treatment of mitochondrial disorders. In some aspects, the disclosure identifies ATPIF1 as a therapeutic target for mitochondrial disorders.

The invention relates to a bionic detection device and method for electronic nose time-space smell information. A gas sensing array and a bionic air chamber are constructed in conjunction with a temperature modulation technology and a film retardation technology, and smell information data of various substances to be identified are acquired to be identified in a classified way through a subsequent mode identification algorithm. The method comprises the following steps: changing the sensitivity and selectivity of a sensor specific to different smell components through the temperature modulation technology, forming a scanning response process specific to different components of complex smell, and acquiring rich time sequence signals of different sensors in the array; setting different breathable films / semi-breathable films in an air path, simulating biological nasal cavity and mucus functions according to the characteristic of difference of diffusion transmission rates of various gas components, and acquiring the difference through the sensors distributed at different positions, namely, spatial information reflecting air chamber spreading of the smell. By adopting the method, the time-space information of the complex gas components is acquired, and a signal foundation is laid for fine identification of complex smell.

A sensor system for receiving an input signal and applying a digital control signal to adjust an output sensitivity of a triggering signal within the sensor system. The input signal includes a bias DC and a fluctuation bias voltage. The sensor system includes a first voltage contact, a normalized voltage contact, a normalized circuit and a comparison circuit. The first voltage contact provides a first comparison voltage based on the digital control signal, wherein the first comparison voltage defines a standby voltage region. The normalized voltage contact provides a reference voltage based on the digital control signal, wherein the reference voltage is located within the standby voltage region. When the fluctuation bias voltage is located outside of the standby voltage region, the sensor system outputs a triggering signal so as to adjust the digital control signal.

A dual spin valve giant magnetoresistance (GMR) sensor having two spin valves with the second spin valve being self-biased is disclosed herein. According to the present invention a dual spin valve system is disclosed wherein the first of the two spin valves in the dual spin valve element is pinned through exchange coupling, i.e., a first anti-ferromagnetic pinning layer and a first ferromagnetic pinned layer structure are exchange coupled for pinning the first magnetic moment of the first ferromagnetic pinned layer structure in a first direction. The second of the two spin valves in the dual spin valve system is self-pinned. The self-pinned spin valve does not use any anti-ferromagnetic layers to pin the magnetization of the pinned layers.

A magneto-resistive layer system, in which a layer arrangement is provided in an environment of a magneto-resistive layer stack working on the basis of the GMR effect or the AMR effect, in particular the layer arrangement generating a resulting magnetic field that acts upon the magneto-resistive layer stack. The layer arrangement has a first magnetic layer and a second magnetic layer, which are separated from one another by a non-magnetic intermediate layer and are ferromagnetically exchange-coupled via the intermediate layer. Furthermore, a sensor element having such a layer system is provided, particularly for the detection of magnetic fields with respect to their strength and / or direction.

The present invention provides an alarm sensitivity detection method and apparatus for a driver state early warning system. The alarm sensitivity detection method includes a fatigue determining step, a lane keeping ability determination step, a road danger degree determination step and an alarm sensitivity determination step; according to the fatigue determining step, the face of a driver is photographed, the eye and mouth images of the driver are identified through image analysis, and fatigue degree is determined through an algorithm; according to the lane keeping ability determination step, the lane keeping ability of the driver is determined based on steering information and lane change information in vehicle driving information; according to the road danger degree determination step, road danger degree is determined based on road position information and vehicle speed; and according to the alarm sensitivity determination step, the degree of alarm sensitivity is determined according to the fatigue degree, the lane keeping ability and the road danger degree. According to the alarm sensitivity detection method and apparatus for the driver state early warning system of the invention, the alarm sensitivity of the driver state early warning system is detected based on the fatigue degree of the driver, the lane keeping ability and the road danger degree, and therefore, detection accuracy can be improved, and the abnormal driving state of the driver can be monitored and warned in real time, and the safety of vehicle driving can be ensured more effectively.

The invention relates to a vehicle dynamic display device and a displaying method thereof. The vehicle dynamic display device comprises an MEMS microaccelerometer, a vehicle state discriminator, a driver, a LED display or an EL emitting diode. An accelerometer is adopted for detecting state; an automatic decision can be performed on states of collision, emergency brake, urgency speed reduction, general speed reduction and acceleration through the vehicle state discriminator; real-time display can be respectively performed according to the urgent degree ordering in various colors, graphics, characters or the combination thereof; hand operation is replaced by automatic control, and the two signals of Preparation-Break replace break signals, so that the difficulty of Emergency Brake Precaution is solved. Once a vehicle is in danger, all vehicles thereafter can synchronously put on the brakes as well as the front vehicle, and an early warning time of 0.8 second to 1 second can be gained, thereby effectively avoiding the phenomena of driving too close to the car in front and serially driving too close to the car in front. The comprehensive early warning mechanism overcomes a plurality of defects in the traditional signal lamp and creates the beginning of mutual communication among vehicles, knowing one and others and safe driving. The invention has the advantages of low cost, high cost performance and simple installation, and is suitable for high-level installation at the tail parts of various vehicles and the installation of rear boxes of motorcycles and mopeds.

The invention discloses a capacitive slide tactile sensor. The capacitive slide tactile sensor is characterized in that a frame of the sensor is composed of a flexible substrate, a flexible upper substrate and rectangle columns; four rectangular flexible sensing pole plates not in contact with one another are arranged on the upper surface of the flexible substrate crosswise, a cross-shaped flexible public pole plate is arranged right above the rectangular flexible sensing pole plates at an interval, and four extension ends of the flexible public pole plate and the corresponding flexible sensing pole plates thereunder form parallel-plate capacitive sensors respectively; a cylindrical feeler lever penetrates the center of the public pole plate, and an anti-slide rubber connector is arranged at the top end of the cylindrical feeler lever. When a target object and the anti-slide rubber contactor generate relative sliding, the cylindrical feeler lever drives the flexible public pole plate to move, and equivalent area of the four parallel-plate capacitive sensors is changed, so that slide tactile information is acquired. The capacitive slide tactile sensor has the advantages of simple structure, high sensitivity and the like.

The present invention provides methods, compositions and kits for detecting the presence, absence or amount of a target nucleic acid or at least one variant nucleotide in one or more nucleic acids contained in a sample.

A system controller controls a solid-state image pickup device so as to read pixels at a predetermined pixel skip-reading-out rate. During pixel skip-reading-out, the system controller adds up, for example, four pixels to acquire a value representative of a unit area for pixel skip-reading-out. A space between adjoining ones of pixels to be added up is set to, for example, a half of an inter-sample space, whereby an MTF of an image signal representing added pixels, which is attained at the sample rate, is set to 0. Consequently, an aliasing noise can be eliminated and deterioration in image quality can be prevented. Moreover, since four pixels are added up irrespective of a pixel skip-reading-out rate, a sensitivity will not vary.

In an imaging device having an all-pixel read mode for reading signals from all pixels and a pixel downsampling read mode for reading signals by appropriately discarding pixels, adjacent ones of pixels use a floating diffusion capacitance, an amplifying transistor, a reset switch and a selection switch in common. In the pixel downsampling read mode, not only a primary capacitance but also a photodiode in each pixel to be discarded are used as capacitances for storing signal charges transferred from transfer switches. This makes it possible to lower the gate voltage of the amplifying transistor as compared with the case of using only the primary capacitance as a capacitance for storing signal charges transferred from a transfer switch to reduce the sensitivity of the pixels, thereby reducing the occurrence of flicker.

Adjacent pixels in a pixel circuit of an imaging device use a primary capacitance, an amplifying transistor, a reset switch and a selection switch in common. Each pixel has a photodiode and a transfer switch having first and second gates provided on the photodiode side and the primary capacitance side, respectively. In a pixel downsampling read mode, the first and second gate voltages of each pixel to be discarded are brought to high level, and thereafter the first and second gate voltages of each pixel to be read are brought to high level, to transfer charge generated in the photodiode of the pixel to be read to the primary capacitance and the photodiode in each pixel to be discarded. This enables reduction of the potential of the primary capacitance, and hence reduction of the pixel sensitivity than using only the primary capacitance to store charge transferred from the transfer switch.

The present invention relates to a radiation image capturing system. A radiation detector of a radiation detecting cassette detects a radiation that has passed through a patient, and an accumulated exposed radiation dose calculator calculates an accumulated exposed radiation dose by accumulating radiation image information detected by the radiation detector, at every image capturing. The calculated accumulated exposed radiation dose is transmitted, together with cassette ID information, to a console. In the console, a status determining unit compares the accumulated exposed radiation dose with an allowable accumulated exposed radiation dose for the radiation detecting cassette to determine the status of the radiation detecting cassette, and issues a warning based on the determined status.