34results about "Electrostatic instruments" patented technology

An interconnection verification means for sensors and a software implementation of interconnection verification between cabling and sensors in large, multi-channel test configurations are disclosed. In a preferred embodiment the sensor assembly comprises a sensor and an indicator electrically connected inline with the sensor. In a preferred embodiment the indicator is an LED. In an even more preferred embodiment, the sensor is an IEPE.

A triaxial piezoelectric sensor includes a PVDF layer, a first line layer, and a second line layer. The PVDF layer has multiple first electrodes and multiple second electrodes. Each first electrodes corresponds to each second electrodes for forming directions of polarization along the X-Y-Z axes. The first line layer has multiple first electrical connection portions and multiple first signal lines. Each first electrical connection portions corresponds to each first electrodes. The second line layer has multiple second electrical connection portions and multiple second signal lines. Each second electrical connection portions corresponds to each second electrodes. The PVDF layer is sandwiched between the first line layer and the second line layer. When an external force is applied to the PVDF layer, the first signal lines and the second signal lines transmit electrical signals according to the deformation of the PVDF layer.

An apparatus for detecting a static field includes a microelectromechanical systems (MEMS) device having two cantilevered beams of conductive material that are adjacent and substantially parallel to each other. The two beams repel each other in the presence of a static field. At least one sensor detects a respective amount of displacement of the two cantilevered beams from a rest position and determines an amount of repulsion of the two cantilevered beams from each other.

The electric potential measuring instrument comprises an electrode arranged on a semiconductor substrate at a position opposite to the object of measurement and a modulation means for modulating the coupling capacitance between the object of measurement and the electrode. The electrode is the gate electrode of a field effect type transistor. The modulated electric current that flows between the source diffusion region and the drain diffusion region of the field effect type transistor is synchronously detected by a detection circuit with the modulation frequency of the modulation means. The output signal that appears on the gage electrode of a field effect type transistor can be measured with ease by changing the coupling capacitance between the electrode of an electric potential measuring instrument and an object of measurement.

A carpet static electricity tester belongs to the carpet inspection device technical field, and comprises a base, a rotary mechanism and a rolling mechanism arranged on the base and a static electricity eliminating device which are connected together, wherein, the rotary mechanism is connected with the rotary disc which can rotate horizontally on the base by the electrical motor fixed inside the base via a rotary shaft; the rolling mechanism is connected with a rolling element by a support seat fixed on the base via a support arm. The tester can simulate human walking in a laboratory to evaluate carpet static electricity performance; moreover, the tester can complete automatic operation, automatic data acquisition and automatic computation of results to reduce manual work, thereby ensuring identical test conditions and the comparability of test result. In addition, a friction rolling mechanism can simulate both feet of human to walk on a carpet; a needle ring can fix a test sample on a turntable, therefore, the test sample can rotary along with the turntable; the rolling element which has certain weight is pressed on a carpet test sample; the rolling surface of the rolling element has a conductive elastic layer; moreover, the conductive elastic layer can conduct the static electricity generated due to the friction between the elastic layer and the carpet. The tester has simple structure and design, low cost, convenient manufacture and safe operation.

A static warning module is attached to an electronic equipment, including a power supply, a signal amplification device, a triode and an alarm. The power supply supplies power to the signal amplification device, the positive-phase input end of the signal amplification device is electrically connected with the electronic equipment, the negative phase input end of the signal amplification device is connected with the negative electrode of the power supply, the output end of the signal amplification device is connected with the base electrode of the triode, the collecting anode of the triode is connected with the positive electrode of the power supply through the alarm and the emitter is connected with the negative electrode of the power supply. The static warning module can detect the excessive static electricity with damages on the electronic equipment and remind the operator to notice by issuing warnings through the alarm, thus improving the security of the electronic equipment.

A voltage detecting device and an analog-to-digital converter (ADC) using the same are provided. The voltage detecting device determines whether input voltage is higher than threshold voltage based on contact of a strip and a membrane. Therefore, high resolution and high speed operation is possible, but with consuming lower power, and an element capable of performing the function of resistor and comparator is provided. Furthermore, a more effective ADC may be provided using the above.

A stray voltage detection system for detecting a stray voltage in pool water within a pool The system comprises a pair of elongate conductive elements, with one of the elongate conductive elements having a detector electrode end and a terminal end, and with the other elongate conductive element having a reference electrode end and a terminal end. The detector electrode end is positioned adjacent to an electrical fixture within the pool and the reference electrode end is positioned opposite from the detector electrode end. The terminal ends are connected to a microprocessor for measuring a voltage between the detector electrode end and reference electrode end. A voltage detection system for a pier, with the system having a pair of elongate conductive elements attached to a pair of corresponding pier pilings on opposite sides of a pier deck, and with the pair of conductive elements for measuring a voltage between the conductive elements.

The invention can calibrate a surface electrometer conveniently in the past. As a result, the user has to entrust the surface electrometer to a third department for calibrating, therefore generating a problem of entrustment cost. The fixed clamp (1) for calibrating comprises: an upper board (2); a side board (5a, the first side board) connecting with the side (S1, the first side) of the upper board (2); a side board (5b, the second side board) connecting with the side (S2, the second side) of the upper board (2) which faces the side (S1); and an opening (3) disposed on the upper board (2) for inserting a sensor of the surface electrometer which is calibrated as an object.

This surface potential sensor is provided with an electret electrode (28), which is configured of a metal film (26) and an electret film (27), said electret electrode being provided on an upper surface of a diaphragm (25) of a semiconductor substrate. Four piezoresistors (29a, 29b, 29c, 29d) are formed on the diaphragm (25), and a distortion quantity detecting unit (32) is configured by forming a bridge circuit using the piezoresistors. Since an electrostatic force that operates between an object and the electret electrode (28) changes corresponding to potential of the object, and the electret electrode (28) warps corresponding to the change, the potential of the object can be detected by measuring a distortion quantity of the electret electrode (28) by means of the distortion quantity detecting unit (32). Consequently, not only the potential of the object but also a polarity thereof can be detected with reduced size and high sensitivity.

The disclosure relates to a method for calculating surface electric field distribution of nanostructures. The method includes the following steps of: providing a nanostructure sample located on an insulated layer of a substrate; spraying first charged nanoparticles to the insulated surface; blowing vapor to the insulated surface and imaging the first charged nanoparticles via an optical microscope, recording the width w between the first charged nanoparticles and the nanostructure sample, and obtaining the voltage U of the nanostructure sample by an equation.

The invention belongs to the field of electrostatic elimination monitoring, and particularly relates to electrostatic elimination monitoring equipment and a monitoring method. Aiming at the problems that the existing monitoring equipment for eliminating static electricity is complex to operate and poor in monitoring effect, and meanwhile, heat generated by the monitoring equipment is not easy to dissipate during monitoring, so the service life of the monitoring equipment is influenced, the invention provides the following scheme: the equipment comprises a base; the top of the base is fixedly connected with a fixing base and electrostatic elimination equipment, the top of the base is slidably connected with a monitoring equipment main body, and the monitoring equipment main body is located between the fixing base and the electrostatic elimination equipment. The equipment is reasonable in structure, and is convenient to operate; the first electrified plate and the second electrified plate are respectively inserted into the two connecting ports, so the electrostatic elimination equipment can be monitored conveniently and quickly, the monitoring equipment main body can be well cooled, the monitoring equipment main body is prevented from being damaged due to over-high temperature, and the service life of the monitoring equipment main body is prolonged.

The invention discloses a static measurement deflector which comprises a conducting rod, furs and a rubber rod and is characterized by also comprising a base, a bracket, a moving plate device and a pair of stator plates, wherein one end of the conducting rod is vertically connected with one end of one of the stator plates; the furs and the rubber rod are arranged at one side of the base; one stator plate is horizontally arranged on the base, and the other stator plate is connected with the bracket and is horizontally arranged above the one stator plate; the moving plate device is arranged between a pair of the stator plates, and comprises a moving plate, a moving plate bracket, a pulley and a groove; the moving plate slides between a pair of the stator plates; the moving plate and a pair of the stator plates are arc metal sheets; the moving plate is connected with one end of the moving plate bracket, and the other end of the moving plate bracket is connected with the pulley; and the pulley is arranged in the groove. The invention has low cost, simple structure, easy application, small volume, convenient carrying, easy popularization and application, more obvious and lucid experiments, obvious experimental effect, environmental protection, energy saving, safety and practicability.

The disclosure relates to a method for detecting surface electric field distribution of nanostructures. The method includes the following steps of: providing a sample located on an insulated surface of a substrate; spraying first charged nanoparticles to the insulated surface; and blowing vapor to the insulated surface to observe a distribution of the first charged nanoparticles via an optical microscope.