43results about "Electrostatic instruments" patented technology

The invention is a detection system and in one embodiment uses inexpensive, miniaturized sensors for detecting electric field (E-field) disturbances. Such sensors are easily and covertly deployable and have low power consumption. The devices may incorporate visual or audio alerts and can include communications hardware for transmitting data for further processing of the electrostatic events.

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.

The invention relates to a device of stimulating the multi-factor joint effect of the electrostatic dynamic potential which comprises the imitating chamber, the data collecting and processing system connected with each other. The chamber comprises the rotating friction disk, static friction disk, thermoprobe, hygrometric probe, elevating controlling device and deriving motor, wherein the friction disk is fixed relative to the static friction disk and connected with the deriving motor, the static friction disc is connected with the elevating controlling device through the force application pallet. The data collecting and processing system comprises the electrostatic dynamic potential measuring probe connected with the host machine and computer in turn.

A system and method for using loop topology identification to investigate a transmission line having a plurality of cable segments. At a measurement plane for each segment, a probing signal is transmitted into the cable. A reflected signal is detected, and an equivalent total input impedance is calculated. The system iteratively calculates the distance between the measurement planes as well as the length, characteristic impedance, and the propagation constant of each segment. A model is used to calculate the respective equivalent input impedance of each segment using the calculated characteristic impedance, propagation constant, and length of the preceding segment. The equivalent total input impedance is then calculated from the iteratively calculated segment values.

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.

The electric potential measuring instrument comprises an electrode arranged on a semiconductor substrate at a position opposite to the object of measurement and a modulator 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 modulator. The output signal that appears on the gate electrode of a field effect 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 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.

The invention discloses to a gas-solid phase pipe flow static measuring appliance and a gas-solid phase pipe flow static measuring method, and relates to a pipe flow static measuring device. The gas-solid pipe flow static measuring device is provided with an internal shielding metal layer, a first insulating layer, a metal layer, a second insulating layer and an external fielding metal layer in sequence from inside to outside. The internal shielding metal layer is provided with an electrode, and is grounded, the metal layer is provided with a measuring electrode, the measuring electrode is externally connected with a static measuring instrument, and the external shielding metal layer is grounded. A pipeline to be measured is inserted into the internal shielding metal layer, and the internal shielding metal layer is tightly attached to the outer wall of the pipeline to be measured. A computer and the static measuring instrument are started, a program window for controlling the static measuring instrument in the computer is started, and a data recording program of the static measuring instrument is started. When the gas-solid phase pipe flow static measuring appliance is started, particles move in the pipeline to be measured by pneumatic transmission, and static generated when the particles impact the wall surface of the pipeline is measured. After the measurement, the gas-solid phase pipe flow static measuring appliance is turned off, the pneumatic transmission is stopped, and a measurement controlling window of the computer is closed, and the static measuring instrument is turned off to accomplish the measuring process.

An electronic detecting circuit includes at least one electrostatic protective module, at least one detection module, and a microprocessor controller module. The at least one detection module is respectively connected to the at least one electrostatic protective module, and the at least one detection module generates a driving record signal according to a driving state of the at least one electrostatic protective module. The microprocessor controller module is coupled with the at least one detection module, wherein the microprocessor controller module records the driving record signal when the at least one detection module transmits the driving record signal to the microprocessor controller module.

An interconnection verification device 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 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.

A capacitance measurement method employing a floating gate of a semiconductor device in a circuit having a MOSFET in which a drain is connected to a ground and a source and a gate are connected to each other, and a capacitor having a capacitance Cr connected to the gate, includes: obtaining a slope S from a relationship between voltage Vs of the source and a voltage Vf applied to the capacitor; setting a standard slope S0 as a y-intercept of a first-order linear equation obtained from a relationship between the slope S depending on the source current Is and the Vo(Is); and calculating a gate-to-drain overlap capacitance Cdgo of the MOSFET based on a capacitance Cr of the capacitor and the standard slop S0.

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.

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 invention relates to a piezoelectric measuring device (100) comprising a sensor element (10) which generates a measurement signal (M) for a pressure to be measured, a conductor element (13) for deriving the measurement signal (M) to a data acquisition device (12), which data acquisition device (12) is configured to acquire and evaluate the derived measurement signal (M), wherein the sensor element (10) comprises an operational amplifier (20) which has an inverting input and an output, a feedback capacitor (22) which is arranged in parallel to the inverting input and output of the operational amplifier (20), and a reset switching element (27) arranged in parallel to the inverting input and output of the operational amplifier (20), wherein the data acquisition device (12) is further configured toto provide an electrical supply voltage (U) for the sensor element (10), wherein the data acquisition device (12) has a measurement cycle circuit (35) configured to switch on the electrical supply voltage (U) for the sensor element (10) before the start of a measurement cycle and to switch it off after completion of the measurement cycle; and that the sensor element (10) has a power-on reset logic (25, 26) configured to detect the presence of the electrical supply voltage (U) and, if the electrical supply voltage (U) is present before the start of a measurement cycle, closes and reopens the reset switching element (27).

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 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.

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.

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.

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 elementhas 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 simplestructure and design, low cost, convenient manufacture and safe operation.

An electrostatic warning module attached to electronic equipment, which includes a power supply, a signal amplifying device, a triode and an alarm; the signal amplifying device is an operational amplifier, the power supply supplies power to the operational amplifier, and the positive The phase input terminal is electrically connected to the electronic device, the inverting input terminal of the operational amplifier is connected to the negative pole of the power supply, the output terminal of the operational amplifier is connected to the base of the triode, and the collector of the triode is connected to the positive pole of the power supply through the alarm The emitter is connected to the negative pole of the power supply. When the amount of static electricity carried by the human body or objects is too small to pose a threat to electronic equipment, the operational amplifier does not respond; if the static electricity is large, the operational amplifier outputs a high level. By turning on the triode, the siren sounds as a warning of excessive static electricity. The static electricity warning module can detect excessive static electricity that is harmful to electronic equipment, and sends a warning through an alarm to remind operators to pay attention, thereby improving the safety of electronic equipment.

The invention relates to a piezoelectric measuring device (100) comprising a sensor element (10) which generates a measurement signal (M) for a pressure to be measured, a conductor element (13) for deriving the measurement signal (M) to a data acquisition device (12), which data acquisition device (12) is configured to acquire and evaluate the derived measurement signal (M), wherein the sensor element (10) comprises an operational amplifier (20) which has an inverting input and an output, a feedback capacitor (22) which is arranged in parallel to the inverting input and output of the operational amplifier (20), and a reset switching element (27) arranged in parallel to the inverting input and output of the operational amplifier (20), wherein the data acquisition device (12) is further configured toto provide an electrical supply voltage (U) for the sensor element (10), wherein the data acquisition device (12) has a measurement cycle circuit (35) configured to switch on the electrical supply voltage (U) for the sensor element (10) before the start of a measurement cycle and to switch it off after completion of the measurement cycle; and that the sensor element (10) has a power-on reset logic (25, 26) configured to detect the presence of the electrical supply voltage (U) and, if the electrical supply voltage (U) is present before the start of a measurement cycle, closes and reopens the reset switching element (27).

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 invention relates to a piezoelectric measuring device having a sensor element for generating a measurement signal for a pressure to be measured and a conductor element for conducting the measurement signal to a data detection device which detects and analyses the conducted measurement signal; the sensor element includes: an operational amplifier having an inverting input terminal and an output terminal; the feedback capacitor is arranged in parallel with the inverting input end and the inverting output end of the operational amplifier; the reset switch element is arranged in parallel with the inverting input end and the inverting output end of the operational amplifier; the data detection device is configured to supply a supply voltage to the sensor element, the data detection device having a measurement period circuit configured to switch on the supply voltage of the sensor element before the start of a measurement period and to switch off after the end of the measurement period; and the sensor element has a power-on reset logic configured to detect the presence of the supply voltage and, in the presence of the supply voltage, close and open the reset switching element again before the start of the measurement period.