30 results about "Electrostatic voltmeter" patented technology

The invention discloses a portable electrostatic detection device and an electrostatic detection method thereof and belongs to the field of detection. A static inductive sensor of the portable electrostatic detection device comprises a shield casing with a signal receiving window; an electrostatic signal receiving surface is arranged inside the casing; a circuit board and a signal transmitting bracket are arranged in the casing; a vibration electrode slice with a vibration source is arranged on the signal transmitting bracket; a covering sheet in parallel to a metallic electrostatic signal receiving surface is arranged at the front end of the vibration electrode slice; the rear end of the vibration electrode slice is fixedly arranged on the signal transmitting bracket or fixedly arranged on the signal transmitting bracket through the vibration source; and an electrical signal processing unit of the portable electrostatic detection device at least comprises a vibration source driving circuit, a signal amplifying circuit, a rectifier circuit and a singlechip circuit. According to the portable electrostatic detection device and the electrostatic detection method thereof disclosed by the invention, the induced electrostatic voltage is converted into alternating voltage by adopting a mechanical interrupt method for an output and subsequent detection / amplifying unit to use, and thus the electrostatic quantitative determination is realized; and in addition, the repeatability of monitored and detected data is favorable and the precision and the stability of the electrostatic detection are improved.

Disclosed is an electrostatic atomizer, which comprises a high-voltage applying section adapted to apply a high voltage between an atomizing electrode and a counter electrode so as to electrostatically atomize water supplied onto the atomizing electrode, wherein the high-voltage applying section is operable to set an absolute value of a voltage to be applied to the atomizing electrode smaller than an absolute value of a voltage to be applied to the counter electrode. This allows a physical object, such as an article stored in a mist-receiving space or an inner wall of a structural member defining the mist-receiving space to become less likely to be electrostatically charged, and makes it possible to avoid causing a problem about discomfort due to discharge of static charges when a user touches the physical object.

An electrostatic voltmeter has an input sensing terminal, a first operational amplifier, a second operational amplifier, a first reference voltage terminal electrically connected to the non-inverting input of the second operational amplifier, a low reference voltage terminal electrically connected to the output of the second operational amplifier, and a voltage indicator, electrically connected between the low reference voltage terminal and the first reference voltage terminal.

The invention provides a device and method for calibrating a non-contact type electrostatic voltmeter. The method includes the steps that a direct-current high-voltage power supply and metal plate electrodes are utilized to acquire a standard static filed at local space near the centers of the electrodes, the voltage of the non-contact type electrostatic voltmeter can be traced to the direct-current voltage standard, and an experimental method that the edge effect is increased is adopted to test the edge effect of the metal plate electrodes. The risks that people get an electric shock are reduced through a glass flat plate support which bears the metal plate electrodes and through a protective resistor, and a perpendicular moving mechanism can adjust the test distance of a calibrated meter. A detachable vernier caliper is adopted, and therefore tracing is convenient to conduct.

This electrostatic atomizer is provided with: a pair of thermoelectric elements (2); a heat absorption-side electrode body (4) that electrically connects the pair of thermoelectric elements (2) on the heat absorbing sides thereof; heat discharge-side electrode bodies (8) that are electrically connected to the thermoelectric elements (2) on the heat discharge side; and a circuit board (20) on which a drive circuit (12) for controlling the passing of current between the pair of thermoelectric elements (2) is mounted. The heat absorption-side electrode body (4) doubles as a discharge electrode (6), and the heat discharge-side electrode bodies (8) double as heat discharge members (10). The heat discharge-side electrode bodies (8) are connected in such a manner as to be integrated with the circuit board (20).

The present invention provides a correcting assembly used for electrostatic voltmeter, a manufacturing method of correcting assembly and a correcting method thereof. The correcting assembly of electrostatic voltmeter comprises the following components: a base plate; a clamping part which is used for loading and clamping an electrostatic voltmeter; a high-voltage plate which is installed on the front end of moving direction of clamping part and is provided with an input end that provides a correcting standard according with the electrostatic voltmeter; a first slide way part which is installedon the base board and is provided with a body with one pair of first rails penetrating the clamping part; a scaleplate part which is installed on one side of clamping part and is provided with a graduated scale, a positioning bolt and a division indicator, and digital scratching marks are provided on the graduated scale; a second slide way part which is installed on the body of clamping part and is provided with one pair of second rails penetrating the clamping paw part that generates relative motion to the body; and a fine adjusting part which is provided at the back end of clamping part body and is used for fine adjusting the distance between the clamping paw part and the body.

The invention relates to a real-time measurement system for surface potential changes of insulating materials. The system includes base, probe and electrode fixing bracket, slide rail ruler, probe holder, support column, high voltage electrode, ground electrode, capacitance probe, probe protective cover, insulating material fixing groove, electrostatic voltmeter, data acquisition system, And a data processing system and a display interface. Among them, the fixed bracket of the probe and the electrode is fixed above the base through the support column, and the sliding guide rail is set on the fixed bracket. The ground electrode is fixed on the base, the insulating material fixing groove is opened on the base, and the electrostatic voltmeter, data acquisition module, data processing system and display interface are connected in sequence. The invention can realize on-line real-time measurement of surface potential of different solid insulating materials and similar solid insulating materials after surface modification under DC voltage and after power off.

An electrostatic atomizer (50) is provided with a chamber (1) and an air passage (7) which connects a liquid level maintaining hole (5) and an air hole (6) which supplies air to the chamber (1) from the outside of the electrostatic atomizer (50). The electrostatic atomizer (50) is configured in such a manner that the supply of liquid from a liquid supply section (3) to the chamber (1) is stopped when the liquid level maintaining hole (5) is closed. The air passage (7) has a bend section (8). A space (10) for holding liquid is formed in the air passage (7).