12 results about "Photoresistor" patented technology

This invention provides an automatic dimming lighting power supply, relating to the field of lighting power supply technology. The automatic dimming lighting power supply includes a main body with a placement groove on its surface. Considering the problems of lighting power supplies, this invention incorporates a linked combination structure of a photoresistor, a microcontroller, and an LED lighting module on one side of the main body. First, the photoresistor detects the external light intensity. As the light intensity changes, the detected signal is transmitted to the microcontroller on one side for analysis and processing. Second, the microcontroller controls the output voltage to adjust the output power of the LED lighting module, thereby ultimately controlling the light intensity of the LED lighting module, achieving an automatic adjustment effect. This automatic dimming power supply technology can automatically adjust the brightness of the lighting fixture according to changes in the brightness of the environment, achieving both energy saving and lighting comfort.

This utility model discloses a makeup mirror capable of automatic fill light adjustment. Its structure includes a mirror shell and a support base. The bottom of the mirror shell is fixedly connected to the support base. Light-transmitting films are installed on both sides of the front end of the mirror shell, and a control button is located at the bottom of the front end. The mirror shell includes a control circuit board located at its inner bottom. Dimming devices are located on both sides of the interior of the mirror shell, and a display screen is installed in the center of the interior. This utility model utilizes the dimming device in conjunction with a photoresistor to detect light. When the detected light brightness is too bright or too dim, a servo motor drives a gear to mesh with the bottom of a light guide tube, causing it to rotate. This allows light-blocking coatings of different thicknesses on the end face of the light guide tube to block the light, achieving different light intensities and realizing the fill light and dimming effect on the face during makeup application.

This invention relates to a device and method for measuring the deflection of a component in a full-size test. The device mainly consists of a parallel worktable, a laser ranging array, a laser receiving array, an inertial sensor, and a controller. The parallel worktable includes a base, an electric push rod, and a working platform. The upper end of the electric push rod is connected to the working platform via a ball joint, and the lower end is connected to the base via a universal joint. The laser ranging array includes three laser rangefinders, each connected to the upper surface of the working platform via an angle adjuster. The laser receiving array includes three laser receivers, each including a fixed plate and a photoresistor. A processor connected to the photoresistor is also mounted on the fixed plate. The inertial sensor can detect the pose of the laser ranging array. The controller is communicatively connected to the laser ranging array, the inertial sensor, the electric push rod, and the processor. This invention has advantages such as high measurement accuracy, simple installation, and fast response speed.

Disclosed in the present invention are a modular monitoring system and an interconnection framework thereof. The modular monitoring system comprises a light control circuit, which controls a PWM signal by means of a light single-chip microcomputer to complete the action execution of an LED lamp; an electric motor control circuit, which controls a photoresistor interface by means of an electric motor single-chip microcomputer to detect environmental information, and feeds back same to a driving electric motor; and a communication circuit, which implements data interconnection by means of a multi-interface circuit and a monitoring apparatus. An upper-level Internet of Things system monitors and manages the system operation state and data collection; by means of a middle-level execution system, an underlying operating system and protocol data conversion are derived; and by means of a lower-level feedback system, data service interfaces and hardware devices are established. Therefore, a multi-module and multi-unit independent circuit system is formed, and circuits can also perform functional interaction to complement each other while executing tasks independently. By means of a multi-channel and multi-interval modular design, the monitoring efficiency and data interaction capability are improved; and the overall operation and maintenance costs are reduced by means of a multi-unit configuration.

This utility model discloses an automatic energy-saving control device for a photovoltaic distributed inverter, including a protective shell. A power supply interface and an output interface are fixedly installed on the inner wall of the protective shell. A transparent window is fixedly connected to the inner wall of the protective shell. A control main board and a mounting plate are fixedly connected to the inner wall of the protective shell. An automatic energy-saving control structure is provided on the surface of the mounting plate. The automatic energy-saving control structure includes an inverter body fixedly connected to the surface of the mounting plate, and a D718 transistor is fixedly connected to the surface of the mounting plate. The transparent window corresponds to the position of a photoresistor. When the ambient light decreases from day to night, the photoresistor senses the weakening of the ambient light and the circuit starts working. When night turns into day, the circuit stops working due to increased light intensity. The advantage of this is that it can achieve automatic control, automatically changing its working state according to the ambient brightness, so that it does not work during the day and automatically works at night.

The application discloses a mistake-proof detection system for longitudinal beam product production of an electric vehicle, and relates to the technical field of longitudinal beam mistake-proof measurement.The application comprises an execution part and a mistake-proof detection part.The execution part calculates the longitudinal beam outer contour size by means of a parallel light emitting unit, a double reflector lens and a photoresistor array through a shadow area width;the mistake-proof detection part adopts a structure of two coaxial plastic ejector pins cooperating with a sliding block, a swing arm and a resistance slide bar rheostat, and can judge the swing position orientation and whether the swing position is inclined in real time, and only when the resistance value matches and the light signal is consistent can the size result be output.The system realizes automatic contact and reset through electromagnetic drive lifting rods, solves the problems of uncertain orientation, inclined misjudgment and separation of measurement and mistake-proof, realizes position mistake-proof and size measurement closed-loop integration, and improves detection precision, automation level and production quality.

Sensor module for concentrated photovoltaic (CPV) technologies using a point-focusing glass Fresnel lens, whose sensor housing (1) is designed as a straight truncated square pyramid, where in an implemented sensor module, has, on its side surfaces facing north, south, east and west, photoresistors (3) with reduced active surfaces (4) as indirect radiation detecting photosensors. At the top of the sensor housing (1), a focal pinhole (8) is formed centrally, and the direct sunlight detecting lens (6) is centrally connected to the top of the sensor housing (1) via a spacer element (7) made of opaque material, the optical axis of which coincides with the longitudinal axis of the sensor housing (1) and the center of the focal pinhole (8).  The optical focal point (10) of the lens (6) coincides with the focal pinhole (8) in the plane of the top of the sensor housing (1) and coincident with the optical axis of the lens (6) inside the sensor housing (1). The central photosensor (9) is arranged at a distance to the optical focus point (10) of the lens (6), therefore it is not damaged by concentrated direct radiation. When the focal pinhole is located, the direct radiation falling on the photosensor stops the sun tracking exactly, while the CPV cells deliver the maximum power. The electrical output of the photosensors (9) is connected to the control unit used in current photovoltaic technology. 

This invention provides an automatic brightness control device and method for lighthouses. The device includes a lighting control module, a brightness adjustment module, a microcontroller module, and a wireless communication module. The lighting control module uses a photoresistor to control the switching between the AC power supply and the signal lights on the lighthouse. The brightness adjustment module uses multiple resistors connected to a circuit to control the brightness of the signal lights on the lighthouse. The microcontroller module is connected to an external control platform via the wireless communication module. The brightness adjustment module includes a buffer circuit, which includes a buffer drive input terminal, a buffer coil, and a buffer switch terminal connected in series with a transition resistor. The buffer drive input terminal is connected to the microcontroller module, and the buffer switch terminal is connected to the lighting control module to provide static clamping voltage division during the switching of the resistor-connected circuit. This invention has the effects of timely automatic start and stop of railway lighthouses and flexible control of lighthouse brightness.

This application relates to an adaptive TO-247 power device based on dual-threshold photosensitive detection, belonging to the field of electronic circuit technology. The device includes a light-transmitting window, a photoresistor located below it, a threshold-independent adjustment knob for independently adjusting the high threshold voltage VH and the low threshold voltage VL, and a TO-247 packaged power MOSFET, with its gate, drain, and source exposed as G, D, and S, respectively. The photoresistor and adjustment knob are electrically connected to form a dual-threshold detection module, and the power MOSFET forms a switching module. The photoresistor senses light and, based on the dual-threshold judgment, controls the on / off state of the MOSFET, achieving adaptive load energization. This application employs a combination of "dual-threshold hysteresis comparison" and "signal buffer capacitor" to form a dual hardware and software anti-jitter mechanism, completely solving the problem of frequent load switching caused by light intensity fluctuations at the illumination threshold in traditional single-threshold circuits, significantly improving system stability and lifespan.

This invention provides an ultra-low-power multi-parameter sensing node based on low-power radio frequency energy harvesting, belonging to the field of radio frequency energy harvesting. It includes a radio frequency energy harvesting circuit, a data acquisition circuit, and a voltage-controlled oscillator (VCO) circuit. The VCO output signal frequency and oscillation time respectively characterize ambient temperature and light intensity information, enabling communication with multiple long-distance mobile terminals. This ultra-low-power multi-parameter sensing node requires no dry-cell battery power, providing system power by harvesting low-power radio frequency energy from the environment. Utilizing the resistance characteristics of photoresistors and thermistors that change with environmental parameters, it achieves low-power environmental sensing without a microcontroller. This invention significantly reduces system power consumption and maintenance costs, improves system applicability in low-power environments, enhances system communication stability, and employs a dual-frequency VCO structure to achieve broadband output and multi-band communication. It supports communication with multiple mobile terminals and enables long-distance information transmission exceeding 350 m.