31results about How to "Trigger stabilization" patented technology

The invention discloses a thyristor LED (Light Emitting Diode) light adjusting circuit and a mixed reference control method thereof, which belong to the technical field of semiconductor lighting. The light adjusting circuit comprises a thyristor light modulator and a drive circuit, wherein the drive circuit comprises a rectifier bridge, an inductor, a switching tube, a rectifier filter output circuit, a mixed reference controller, a voltage sampling circuit and a current sampling circuit. The mixed reference control method comprises the following steps that an instantaneous value of input voltage of the drive circuit is compared with a reference value of reference voltage set in the mixed reference controller, and current reference is obtained; and then an instantaneous value of current which passes through the switching tube is compared with the current reference, and a signal used for controlling the switching tube to connect and disconnect is obtained. A flexible current reference combined mode is adopted to guarantee that relatively larger working current can pass through a light adjusting thyristor even if the instantaneous amplitude of the input voltage is lower. By using the method, the LED flicker phenomenon due to thyristor light adjustment can be effectively reduced, a high power factor can be kept, and the conversion efficiency of the drive circuit is increased.

The invention discloses a vacuum trigger switch comprising a closed shell. Negative pole and positive pole are respectively arranged at two ends of the closed shell, the negative pole comprises a negative pole guide rod, a negative pole contact terminal and a negative pole contact terminal sheet, the positive pole comprises a positive pole guide rod, a positive pole contact terminal and a positive pole contact terminal sheet, and the negative pole and the positive pole are hollow cylindrical and are provided with spiral notching, and the negative pole contact terminal and the positive pole contact terminal are of a cup shape, are provided with cylindrical wall, are provided with round hole in the middle of the cup bottom and are provided with spiral notching. The negative pole guide rod and the positive pole guide rod are coaxially and tightly connected with the cup bottoms of the negative pole contact terminal and the positive pole contact terminal, and the cup mouths of the negative pole contact terminal and the positive pole contact terminal are tightly connected with the negative pole contact terminal sheet and the positive pole contact terminal sheet. With the vacuum trigger switch, the electric pole ablated problem caused by electric arc gathering is avoided, the problem that metal plasma bodies in the electric arc splashes to trigger surface can be effectively avoided, service life of the vacuum trigger switch is prolonged and trigger energy is greatly reduced.

The invention relates to the technical field of temperature control sensors, in particular to a PTC integrated sensor. The PTC integrated sensor comprises a base. A sensing component is arranged in the base. The upper end of the base is sleeved with an upper cover which independently acts relative to the base. A compression spring is arranged between the base and the upper cover. The upper cover is in abutting linkage with the sensing component in the base in the downward-pressing process. The sensing component comprises an overheating power-off device provided with a heat keeping device. According to the PTC integrated sensor, when the temperature rise of an inner pot exceeds a thermistor set value, a main control panel circuit is switched off to achieve power-off protection; a heating circuit can be switched off when a contact piece deforms, at the moment, the PTC heating source heats a temperature sensing piece, and the power-off state is kept to prevent the problem that the contact piece is cooled and connected with the heating circuit again; a fusing core is directly molten through high temperature, and the heating circuit is switched off with force to achieve final protection; the temperature sensing piece and an insulation support are used as stress reaction components, the off-line problem of lead welding points is reduced, and the sensor is high in overall integration, convenient to maintain and stable to trigger and is perfectly protected.

The invention discloses an oscilloscope and a timing setting method and system thereof under an automatic collection mode. The system comprises a state machine which sets n pieces of states, and a timer, wherein a first state corresponds to timing time and a serial number progressive increase detection period; the nth state corresponds to the timing time and a serial number progressive decrease detection period; other states independently correspond to the timing time, the serial number progressive increase detection period and the serial number progressive decrease detection period; the timing time of the first state to an (n-1)th state progressively increases in sequence; the timing time of the first state is greater than the nth state; when a trigger signal is not detected in the serial number progressive increase detection period of a current state, an adjacent high serial number state is entered; when a plurality of trigger signals are detected in the serial number progressive decrease detection period of the current state, an adjacent low serial number state is entered; and therefore, according to the timing time of the current state of the state machine, timing sampling is carried out. Therefore, the timing time of the timing sample is adaptively regulated, and the stable trigger of a waveform is realized.

The invention discloses a passive switch type heating kettle which comprises a kettle body and a kettle cover, and the kettle body comprises a kettle body and a base; the kettle body is provided witha heating inner container, a heating component is arranged outside the heating inner container, and a switch for controlling the heating component is arranged inside the base. A rotary cover is rotatably arranged at the top of the kettle cover, a transmission rod is vertically arranged in the kettle cover, and the transmission rod is slidably arranged in a first through hole in the bottom of the kettle cover; a driven part is arranged on one side of the kettle body in the vertical direction in a sliding mode, the bottom end of the driven part is located above a switch button of the switch, andwhen the kettle cover is completely connected with the kettle body in a screwed mode, the top end of the driven part corresponds to the transmission rod in position; when the rotary cover rotates, the switch is opened or closed based on the cooperation of the transmission rod and the driven part, and therefore, the heating component is started or stopped. In the embodiment of the invention, a heating trigger structure is arranged in the passive switch type heating kettle, so that the problem of empty heating of the passive switch type heating kettle can be effectively avoided, and the personal safety of a user is guaranteed.

The invention relates to a method and a system for high-accuracy simultaneous observation of a long air gap. The method comprises the following steps of: employing an optical observation system and an electrical measurement system, wherein the optical observation system comprises a static-state optical imaging device and a high-speed imaging device; and the electrical measurement system comprises a current measuring device, an electric field measuring device and a voltage measuring device; triggering the high-speed imaging device and the static-state optical imaging device by using a high-speed trigger and controlling the two devices to take photos, and obtaining the photos by a high-speed camera through a network cable via a computer; synchronously triggering the high-speed imaging device and the static-state optical imaging device by means of the high-speed trigger, and outputting the exposure clock signal and an imaging start recording signal of the high-speed imaging device through a coaxial cable; and triggering a high-speed storing / recording device by using the imaging start recording signal to record all electrical signals. The system is composed of the static-state optical imaging device, the high-speed imaging device, a transient-state electric field measuring device, a discharge current measuring device, a discharge voltage measuring device, a high-speed data memory device and the high-speed trigger.

The invention discloses a digital control device for three-phase AC voltage regulation. The primary side of a three-phase transformer is connected to a three-phase AC power supply, and the secondary side is electrically connected to a zero-crossing detection module and a three-phase rectifier circuit; the zero-crossing detection module, data acquisition The output ends of the modules are respectively connected to the host computer, and the host computer controls the three-phase rectification circuit through the pulse trigger module; the invention also discloses a digital control method for three-phase AC voltage regulation: the data acquisition module collects the measured voltage signal and the measured current of the load signal, the upper computer calculates the deviation between the measured voltage signal and the given voltage signal, and obtains the current control amount through voltage loop adjustment control; calculates the deviation between the current control amount and the measured current signal, and obtains the voltage control amount through current adjustment control, and the upper computer refers to The zero-crossing pulse signal output by the zero detection module enables the pulse trigger module to output a pulse signal to control the three-phase rectification circuit to realize three-phase AC voltage regulation. The invention has the characteristics of precise zero-crossing detection, stable triggering and the like.

The invention belongs to the technical field of pulse power, and particularly relates to a capacitive voltage division type self-triggering LTD (linear transformer driver). Common induction cavities and self-triggering induction cavities are serially connected by a secondary center bus bar to form the self-triggering LTD, the common induction cavities form a few front stages of the LTD, and the rest stages are the self-triggering induction cavities. The whole LTD can be triggered only by triggering the common induction cavities at the front stages when in operation. A metal triggering cylinder is added between inner metal and the secondary center bus bar in each common induction cavity, and insulating media are filled in two gaps, so that each self-triggering induction cavity is formed. The added metal triggering cylinders are used for realizing capacitive voltage division of the self-triggering induction cavities. The number of external triggering pulses can be effectively decreased, and the LTD is reliably triggered.

The invention discloses a bipolar trigger type multi-rod-electrode vacuum trigger switch which comprises a sealed shell body, wherein the sealed shell body is formed by an insulation outer shell, a cathode flange and an anode flange, and the cathode flange and the anode flange are arranged at the two ends of the insulation outer shell; a cathode and an anode are arranged at the two ends of the sealed shell body respectively, the cathode and anode have the same structure and are respectively provided with an electrode bottom column, an electrode platform and multiple rod-shaped electrodes arranged on the electrode platform; the rod-shaped electrodes of the cathode and rod-shaped electrodes of the anode extend in opposite directions and are arranged in a staggered mode, the widths of gaps between the adjacent rod-shaped electrodes are the same, and the widths of the gaps are the same as the widths from top ends of the rod-shaped electrodes to the opposite electrode platforms; a cathode trigger structure and an anode trigger structure are arranged in the cathode and the anode respectively. The switch can be stably triggered regardless of the polarity of voltage of main gaps, application requirements under power frequency voltage of an electric power system can be met, through-current capability is higher, the service life is longer, and self-breakdown does not easily occur.