33results about How to "No external power supply required" patented technology

The invention relates to the field of energy storage and utilization and discloses an islet energy system and a working method thereof. The islet energy system comprises a bidirectional energy storageinverter, a photovoltaic subsystem, an optical thermal subsystem, an absorption refrigeration subsystem and an energy storage subsystem, wherein the photovoltaic subsystem is powered on at day time to generate power through solar energy; power is output from the photovoltaic subsystem; direct current is converted into alternative current to be supplied to users through the bidirectional energy storage inverter; extra current is stored in the energy storage subsystem; the optical thermal subsystem is used for generating and storing thermal energy from solar energy; the absorption refrigerationsubsystem is used for generating cold energy from electric energy and thermal energy; the energy storage subsystem is powered on at night; power is output from the energy storage subsystem and is rectified by the bidirectional energy storage inverter to be supplied to users; the absorption refrigeration subsystem is driven through electric energy and thermal energy, and cold energy is generated.By using an energy storage technique and a bidirectional energy storage inversion technique, power supply, heat supply and cold supply to an islet are achieved under the condition that no large powergrid support is available, external power supply is not needed, and comprehensive utilization of renewable energy is achieved.

An untrusted energy collection relay transmission method and system under full-duplex destination scrambling, divides a time block T into two identical time slots, and in the first time slot T / 2, the source end S sends information To the untrusted relay R and the destination terminal D, the destination terminal D sends an interference signal to the untrusted relay R while receiving the information, and the untrusted relay R uses the power distribution-based energy collection protocol to collect energy and information Receiving; in the second time slot T / 2, the source end and the untrusted relay send information to the destination end D, and the destination end D uses the maximum ratio combining technology to combine the signals sent by the source end and the untrusted relay. The invention makes full use of the advantages of full duplex, energy collection, antenna selection and maximum ratio combining technology, and can significantly improve the system throughput and capacity.

A design method and circuit for a serial port multi-stage charging and discharging power supply. The method and circuit are designed to charge a dedicated multi-stage charging and discharging circuit by taking power from the micro-current signal source of the serial port to obtain a power supply powered by an instantaneous large current. Under the premise of not affecting the quality of signal communication, solve the problem of self-power supply based on serial port. The micro-signal source includes a 3-wire system that takes power from the TxD terminal of the RS232 port, and obtains charging power through bidirectional rectification and filtering and charge pump reverse polarity. The first-stage power supply is the main power supply, and the second-stage power supply is the backup power supply. , the main power supply is supported by the backup power supply, so that the method and the circuit meet the extreme power supply requirements in the following cases when the power supply current does not exceed 5mA: support Bluetooth devices at +8dB radio transmission, instantaneous current 20mA, communication distance Up to 300 meters, send data every 4 seconds, and the data length supports 255 bytes. In addition, as an option, a long-life battery micro-current power supply is also used to provide display and connector validity monitoring for up to 9.5 years in storage.

The application discloses a fireless outdoor food heating system based on solar catalytic oxidation, which relates to the technical field of solar energy application. The heating system includes a pot body, a methanol-air spray tank, a heat exchanger and a photovoltaic module; the pot body includes a heating chamber for placing food, an annular flue arranged outside the heating chamber, and an Between the catalytic chamber and the spray chamber, the opening of the heating chamber is upward, and the spray chamber is located above the catalytic chamber; a fan is arranged in the spray chamber; the methanol-air spray tank is arranged on the outside of the heating chamber, and the outlets of the methanol-air spray tank are sequentially The spray chamber, the catalytic chamber and the annular flue are connected; the heat exchanger is arranged under the heating chamber and on the side away from the methanol-air spray tank, and the photovoltaic module is arranged outside the annular flue. The photovoltaic module can store electric energy and assist the heat exchanger To heat food, photovoltaic modules can also provide electricity for fans. This application is used to improve the performance of outdoor food heating systems.

The invention discloses a full-duplex energy collection relay transmission method based on the self-interference minimization criterion, comprising: acquiring information received by a destination terminal and a corresponding first signal-to-noise ratio; selecting a receiving antenna and a transmitting antenna of the relay; Obtain the signal received by the relay in the first time slot αT; obtain the signal received by the relay when the source information is transmitted through the relay in the second time slot (1‑α)T; obtain the signal received by the relay in the second time slot (1‑α)T In the slot (1‑α)T, when the source information is transmitted through the relay, the information received by the destination and the corresponding second signal-to-noise ratio; the destination adopts the maximum ratio combining technology to combine the information from the relay and the source, The receiving signal-to-noise ratio of the destination is obtained by summing the first signal-to-noise ratio and the second signal-to-noise ratio; and the instantaneous safety capacity and system throughput of the system are obtained based on the receiving signal-to-noise ratio of the destination. The simultaneous and same-frequency full-duplex technology of the present invention can nearly double the use efficiency of wireless resources, thereby significantly improving system throughput and capacity.

The invention discloses a super-cooled temperature monitoring method based on a shape memory alloy. The method comprises the following steps: 1) taking a shape memory alloy, of which the weight is 10-20 mg and which is in arbitrary shape, as a super-cooled temperature monitoring material; 2) attaching the super-cooled temperature monitoring material directly onto the surface of a monitored product or an internal or external fit position of a package box and then, carrying out super-cooled temperature monitoring; 3) after the monitoring is finished, carrying out analysis on the super-cooled temperature monitoring material through a thermal analysis instrument, and comparing the monitoring result with an original measurement result to obtain information about whether the monitored product is lower than the minimum temperature in the monitoring process and specific temperature exceeding information; and 4) carrying out heating processing on the super-cooled temperature monitoring material until reaching a temperature higher than the austenite transformation finish temperature, so that recycle use of the super-cooled temperature monitoring material can be realized. The super-cooled temperature monitoring method does not need external power supply and can keep history temperature information for a long time.

A multi-touch piezoelectric warning circuit comprises an energy storage circuit and an alarm circuit. The multi-touch piezoelectric warning circuit adopts three triggering modes, the first mode is that a produced current fluctuation signal is transferred to a 555 timer chip to give an alarm when a piezoelectric sensor produces vibration, the second mode is that the produced fluctuation signal is transferred to a 555 timer chip to give an alarm when an electrode plate produces vibration, the third mode is that a TR interface of the 555 timer chip is connected with a grounding wire to produce low level and give an alarm when a vibration sensor produces vibration. Energy used by the multi-touch piezoelectric warning circuit is produced through the piezoelectric sensor and stored for utilization, and the piezoelectric sensor is a multi-layer composite plate or a beam structure and comprises a piezoelectric layer and a metal base layer. The multi-touch piezoelectric warning circuit is high in sensitivity and reliability, uses self-generated electricity energy and does not need battery replacement or external charging and other operations.