7 results about "Lamp current" patented technology

A lamp current detection device comprises a control unit and a power connection unit, the control unit is connected with the power connection unit, after the power connection unit is connected with a lamp, detection is carried out through the control unit, a detection structure is output and displayed, a plurality of detection circuits are arranged in the control unit, each detection circuit comprises a main circuit and a plurality of auxiliary circuits, and the main circuits are connected with the auxiliary circuits. The main circuit and the plurality of auxiliary circuits are respectively connected to power connection terminals of the power connection unit, the main circuit and the plurality of auxiliary circuits are arranged in the control unit through cooperative work of the control unit and the power connection unit, each auxiliary circuit and the main circuit can form an independent detection circuit, a plurality of circuit modules in the lamp can be detected at the same time, and the detection efficiency is improved. Synchronous detection of parameters of all the modules is achieved, the detection time is greatly shortened, the detection efficiency is remarkably improved, and the production progress of a lamp production line is effectively accelerated.

The utility model relates to the technical field of garden lighting, in particular to a garden lamp with an insect repelling function, which comprises a support frame, one side of the support frame is connected with a solar panel, the bottom of the solar panel is provided with a shielding shell, the bottom of the shielding shell is provided with a connecting rod, one side of the connecting rod is provided with a protective rod, and the protective rod is connected with the support frame. A current net is arranged on one side of the protection rod, a supporting base is installed at the bottom of the current net, an inducing lamp is installed at the upper end of the supporting base, a garden lamp is arranged at the upper end of the inducing lamp, a fixed base is installed at the bottom of the connecting rod, a rotating handle is installed on one side of the fixed base, and a stop block is installed at the bottom of the rotating handle. According to the improved garden lamp, a current net and a luring lamp are additionally arranged, the current net conducts current killing on mosquitoes through current, the mosquitoes are prevented from influencing passers-by, and the collecting box and a check block are additionally arranged so that the collecting box can be rapidly disassembled and replaced.

Driver circuit for operating a light source, preferably at least one LED, comprising a galvanically isolated converter switched on the primary side by a control unit (SE', SE'') by means of at least one controlled switch unit (S), the switch unit (S) with a first inverter switch (Q1) and a second inverter switch (Q2), which feeds a rectifier (D1, D2) from which the light source can be supplied, wherein a detection circuit (E', E'') for indirect detection of the current on the secondary side of the converter comprises a transformer (L3_1, L3_3) with at least one primary-side winding (L3_1), wherein the detection circuit (E', E'') includes an active detection rectifier (AG, AG'), wherein the control unit (SE', SE'') activates / deactivates a first diagonal of the active rectifier (AG, AG') synchronously with the first inverter switch (Q1), and wherein the control unit (SE', SE'') activates / deactivates a second diagonal of the active rectifier (AG', AG'') synchronously with the second inverter switch (Q2), and wherein only the first or the second diagonal is active at any given time, wherein the secondary winding (L3_3) of the transformer (L3_1, L3_3) is part of each of the diagonals of the active sensing rectifier (AG, AG'), where, by switching the tap of the secondary winding (L3_3), the fault-inducing "reverse current" is measured as a negative current, so that the lamp current is controlled by the control unit (SE'') by a corresponding control of the switch unit (S) on the primary side of the circuit, wherein the parameter representing the current through the light source is detected by means of an integration circuit (I), wherein a feedback signal is detected at the midpoint of a voltage divider formed from two resistors (R1, R2) by the control unit (SE''), where the voltage divider (R1, R2) is connected in parallel with a capacitor (C3), and wherein the rectified output signal from the active detection rectifier (AG') is supplied to the parallel circuit at the higher potential terminal of the capacitor (C3).

This utility model belongs to the field of power supply circuit technology. It provides an ultraviolet lamp comprising a power supply module, a transformer module, a rectifier module, a filter module, a voltage regulator module, and a drive load module; these modules are connected sequentially. The ultraviolet lamp provided by this utility model uses a transformer module to convert the AC power output from the power supply module into unidirectional pulsating DC power. The filter module and voltage regulator module are connected between the main circuit and the load, effectively filtering out the AC component in the pulsating DC voltage. This provides a high starting voltage for the ultraviolet lamp and limits the lamp current to a stable range, enabling effective and stable high-intensity output for better sterilization.

The invention relates to the technical field of municipal lighting public service application, in particular to a municipal lighting street lamp electric leakage monitoring and positioning system which comprises a municipal street lamp public service platform, a distribution box gateway and a street lamp electric leakage monitoring terminal. The municipal street lamp public service platform is used for displaying the working state of the street lamp; the distribution box gateway comprises a main processing module, a LoRa communication module, a 4G / 5G network communication module, a Beidou positioning module and a power supply module; the street lamp electric leakage monitoring terminal comprises a main processing module, a LoRa communication module, a residual current monitoring module, a street lamp current and voltage monitoring module, a lamp control module, a temperature sensor and a water sensor. The system has the following beneficial effects: the system is accurate in electric leakage positioning, low in communication cost and power consumption, high in installation and maintenance efficiency, high in reliability and safety, capable of supporting an energy-saving control strategy, and remarkable in economic benefit.

The utility model discloses a trailer detection circuit compatible with an LED lamp flasher, comprising a PNP triode Q6 and a PNP triode Q7, the base electrode of the PNP triode Q6 is connected with a left steering trailer control IO through a resistor R24, the emitter electrode of the PNP triode Q6 is connected with one end of a resistor R73, and the other end of the resistor R73 is respectively connected with one end of a resistor R65 and the negative electrode of a diode D22. According to the utility model, the output of the trailer detection circuit is controlled through the two triodes, when the steering switch is not turned on, the current flowing through the LED lamp is zero, and the LED lamp is not lightened, and only when the steering switch is turned on, the triodes are conducted for several milliseconds, so that whether the trailer exists or not is detected. According to the trailer detection circuit compatible with the LED lamp flasher, the working state of the light of the trailer can be monitored in real time, faults can be found in time, a driver is reminded to maintain the trailer, and therefore the driving safety of the trailer is improved.

The invention provides a detection method for determining the content of vitamin B12 by atomic absorption spectrometry, which comprises the following steps: S1, digesting a specified amount of sample, destroying organic matters, dissociating cobalt element to form ions, and quantitatively diluting digestive juice by using a 1% nitric acid solution to obtain a to-be-tested sample solution; s2, the to-be-tested sample solution is subjected to flame atomic absorption spectrometry determination, the analysis spectral line of cobalt is 240.7 nm, the slit width is 0.5 nm, the lamp current is 5 ma, and a cobalt air core cathode lamp is used as a light source; s3, after the content of the cobalt element is measured, the content of vitamin B12 is calculated through the conversion coefficient; the method provided by the invention is simple in sample pretreatment, does not need complex separation and purification steps, and is high in sensitivity.