272 results about "Potentiometric sensor" patented technology

A differential non-contact sensor system for measuring biopotential signals is described. The sensor is a low-noise, non-contact capacitive sensor system to measure electrical voltage signals generated by the body comprising two capacitive electrodes and outputting a differential signal.

A transducer system is disclosed for detecting actual or simulated body sounds. An audio signal generation and detection system is disclosed for the purposes of simulating the medical examination of a patient or simulating the listening of sounds seeming to emanate from a live or inanimate body. A signal generator sets up a voltage potential at an electrode physically attached to the body, or electrically connected to a body, thereby setting up a voltage potential on a surface area of the body. An electric field potential sensor or a capacitive electrical sensor placed in proximity to the electrode or body surface then detects the voltage potential. The signals produced by the signal generator can represent heart, lung, bowel or other sounds and the electrical sensor can take the physical form of a listening device such as a stethoscope, thereby creating a simulation of listening to body sounds for medical diagnostic purposes.

A capacitive sensor system including a sensing plate, an amplifier, and a switching circuit is described. The sensing plate is capacitively coupled to a body surface. A change in the electric potential on the body surface generates an electric field that induces change in the electric potential of the sensing plate. The sensing plate includes a sensing node positioned in the electric field for generating an input signal from the electric field. The sensing plate is not in contact with the body surface. The amplifier receives the input signal at the input port, amplifies the input signal and generates an output signal at the output port. The switching circuit is connected to the input port and a reference voltage. The switching circuit non-continuously closes a shunting path from the sensing node to the reference voltage to reset the voltage at the sensing node.

Disclosed in a non-contacting electric potential sensor capable of being readily reduced in its size, which includes a detecting electrode, an electrically-conductive movable shutter, and a driving unit for driving the electrically-conductive movable shutter. The detecting electrode is to be placed facing a measurement object whose electric potential is to be measured. The electrically-conductive movable shutter is disposed so as to be movably located in a spacing formed between the detecting electrode and the measurement object when the detecting electrode is placed facing the measurement object, so that an exposure degree of the detecting electrode against the measurement object can be controlled. The driving unit includes a current injecting unit for selectively injecting current into the electrically-conductive movable shutter in a direction approximately perpendicular to a moving direction of the electrically-conductive movable shutter.

This invention is directed to materials and devices for sensing bio-potential signals from animals, particularly to sensing bio-potential signals to monitor humans in the medical field. In general, bio-potential sensors may be attached to the body of an animal, such as a human, in order to receive bio-potential signals such that information about the bioelectrical properties of the cells and/or tissues of the animal may be gathered. The bio-potential sensor may generally include a dry electrode that may be placed in contact with the skin of an animal to receive bio-potential signals from the animal. A dry electrode may generally include an electrically conductive solid material which may conduct electrical signals from an animal.

The inventions relates to a kit comprising a swallowable capsule (1, 45) with a potentiometric sensor (3), such as a pH sensor, with an unfilled electrolyte cell (31). The kit further includes a separate container (46) containing a liquid electrolyte. The kit can, e.g., be packed in a blister package. After unpacking the capsule the electrolyte cell (31) is filled with the electrolyte.

An electrical potential sensor device comprises sensor electrodes arranged to measure a voltage based on a change in electrical charge induced in the sensor electrodes by exposure to an electrical potential of a source to be measured. An electro-thermally operated mechanism, adjacent to the sensor electrodes, is movable between a first position in which only first ones of the sensor electrodes are exposed to the electrical potential of the source to be measured and other sensor electrodes are shielded from the electrical potential, and a second position in which other ones of the sensor electrodes are exposed to the electrical potential and the first ones are substantially shielded from the electrical potential. A controller combines the output from the two sets of electrodes which are alternately exposed to the electrical potential to calculate a resulting measured/sensed voltage or measured/sensed electrical potential of the device.

A method and system for contact potential sensing of dielectric properties of a fluid. The method and system include a contact potential sensor, an open or closed loop for passing a fluid past the sensor, measuring a contact potential to characterize dielectric properties of the fluid and outputting the dielectric property information for analysis and response thereto.

The invention relates to a hydraulic swing cylinder and potential sensor closed-loop control based modular robot driving joint. The modular robot driving joint includes a mechanical section and a control section. The mechanical section includes a driving joint L-shaped carrier, a plane side plate, a hydraulic swing cylinder, a swing cylinder gear, a potentiometer gear, a potentiometer connection block, a hydraulic swing cylinder cushion block, a swing cylinder backing plate A, a swing cylinder backing plate B, a fixing end cover, a motor and hydraulic pump support, and a shaft coupling. The control section includes a host computer, a potentiometer sensor, a signal control card, a flowmeter, a hydraulic pump and a hydraulic pump driving motor. According to the invention, a function relationship between the flow of the hydraulic pump and the rotation angle of the hydraulic swing cylinder of the driving joint is established, the rotation angle of the hydraulic swing cylinder can be adjusted in real time, and then a closed feedback loop is formed, and accurate control of the hydraulic swing cylinder can be achieved; the robot hydraulic driving joint can output large torque, is simple in structure, and is modular and standardized; series connection of mechanical arms and rapid establishment of multi-degree of freedom mechanical arms can be achieved, and modular production can be achieved.

The invention relates to a sensor, in particular to a polymer liquid film potential sensor for detecting enzymatic activity and a detection method thereof. A potential detector is respectively connected with an internal reference electrode and an external reference electrode through wires, the internal reference electrode is inserted in a working electrode filled with internal liquid, the working electrode and the external reference electrode are inserted in a detection pool with detection liquid, the working electrode is an electrode carrier on which a polymer sensitive film is fixed, and a power device with a solution disturbance function is arranged in the detection pool. According the detection method, the potential detector is used for detecting the change of the potential of the polymer sensitive film at the bottom of the working electrode before and after enzymatic reaction, and the enzymatic activity concentration can be detected on the basis of a standard working curve according to a potential change signal. The potential sensor has the advantages of high generality, good selectivity, high sensitivity and low cost and is suitable for detection under a complicated matrix condition.

An E-healthy partitioned mattress capable of recognizing and recording sleep behavior without interference is characterized by being formed by combining an upper-layer mattress body and a lower-layer mattress body, wherein multiple logarithmic potentiometric sensors distributed in a reticular matrix shape are fixed in an upper surface layer fabric composite layer of the upper-layer mattress body and connected with an information collector, and human-bed interface dent amount information and logarithmic potentiometer output voltage signals synchronously changed with the human-bed interface dent amount information, which are continuously collected, are transmitted to a data processor through the information collector, so that human-bed interface dent shapes and sleeper behavior event occurrence signals are obtained simultaneously; the lower-layer mattress body is formed by combining five independent unit modules, namely, a head area, a shoulder area, a waist area, a hip area and a leg area. The mattress can recognize and record the human sleep behavior, provide technical support for healthy sleep monitoring and research as well as E-healthy sleep experience and quantitatively research the supporting relationship between a human and a bed.

A potential sensor (101) including first and second detection electrodes (121 a, b) opposed to an object of which a potential is to be measured, and a movable shutter (125) so positioned between the detection electrodes and the potential-measured object with gaps thereto; wherein the movable shutter can assume a first state and a second state, the first detection electrode is exposed to the potential-measured object wider when the movable shutter assumes the first state than when the movable shutter assumes the second state, and the second detection electrode is exposed to the potential-measured object narrower when the movable shutter assumes the first state than when the movable shutter assumes the second state.

The invention discloses a pipe transmission oriented cathode protection system which comprises a plurality of cathode protection potential sensors, a cathode protection potential receiving device and a computing and processing deivce, wherein the plurality of cathode protection potential sensors are respectively distributed at underground pipes and connected with the cathode protection potential receiving device through transmission cables, the cathode protection potential receiving device is connected with the computing and processing device, the computing and processing device operates cathode protection online detection software for detecting and evaluating cathode protection operation. The invention provide a whole set of technical solution about cathode protection potential detection, evaluation and data transmission and has significance for protecting the normal and effective operation of a system, realizing effective protection of cathode protection pipes in a gas station, preventing leakage accidents caused by corrosion and guaranteeing the safety of the gas station.

The invention discloses a partial discharge comprehensive itinerant detector for high voltage electric power equipment. The partial discharge comprehensive itinerant detector for the high voltage electric power equipment is characterized by comprising a host and a sensor group connected with the host, wherein the sensor group comprises a transient state ground potential sensor, an ultrahigh frequency electromagnetic wave sensor, a non-contacting ultrasonic sensor and a contacting ultrasonic sensor; the transient state ground potential sensor is used for detecting a current pulse signal on the shell of the electric power equipment; the ultrahigh frequency electromagnetic wave sensor is used for detecting an electromagnetic wave signal transmitted from the inside of the electric power equipment; the non-contacting ultrasonic sensor is used for detecting an ultrasonic wave signal transmitted from the inside of the electric power equipment; the contacting ultrasonic sensor is used for detecting shell vibration caused by the ultrasonic wave signal transmitted from the inside of the electric power equipment; and the transient state ground potential sensor, the ultrahigh frequency electromagnetic wave sensor, the non-contacting ultrasonic sensor and the contacting ultrasonic sensor are all connected with the host. According to the partial discharge comprehensive itinerant detector, a transformer, a composite apparatus (gas insulated switchgear) and a switch cabinet can be conveniently subjected to partial discharge electrification detection, and the partial discharge comprehensive itinerant detector for the high voltage electric power equipment has the outstanding advantages of convenience in carrying the instrument, as well as quickness and intellectualization in detection.

The invention provides a method and apparatus for the detection of charge density distribution at the surface of a material sample. The apparatus comprises an electric potential sensor for measuring surface charge on a material sample, wherein the electrical potential sensor includes a probe for capacitively coupling the electric potential sensor to the surface of the material sample, an amplifier for generating a measurement output, the probe being connected to an input of the amplifier and the measurement output being supplied at an output of the amplifier, and a feedback arrangement driven from the output of the amplifier for enhancing the input impedance of the amplifier. A positioning system mounts the probe of the electric potential sensor above the material sample and moves the probe at a constant height over a surface of the said sample, and a processing system receives and processes the measurement output of the electric potential sensor for generating a digital record of the charge density distribution at the surface of the material sample.

The present invention is a method and apparatus for measuring the total NO_x concentration in a gas stream utilizing the principles of a NO_x sensor, i.e., mixed potential sensor. The exhaust gas is first conditioned by a catalyst assembly that converts the various species of nitrogen oxide gases present to a fixed steady state concentration ratio of NO₂/NO, where NO₂ is approximately 0-10% of the total NO_x concentration present in the gas exhaust, thereby enabling the NO_x sensor to generate a meaningful and reproducible determination of the concentration of total NO_x present in the gas being measured. The catalyst assembly also functions to oxidize any unburned combustibles such as CH₄, CO, etc., and remove potential contaminants such as SO₂.

The present discloses an ion sensor and its readout circuit. The sensor includes potentiometric, amperometric ion sensors or dual mode electrochemical sensor. The dual mode electrochemical sensors can be measured by the same measurement circuit system. The dual mode sensors are extended gate ion sensitive field effect transistors and amperometric biosensors. The measurement circuit system is adaptable to the different mode sensors.