5 results about "24-bit" patented technology

The utility model discloses a kind of nickel-titanium shape memory alloy resistance strain gauges for bridge strain monitoring, comprising: sensing element, by NiTi shape memory alloy wire is constituted, and the both ends of the NiTi shape memory alloy wire are fixed electrically connected by cold-pressing terminal;Packaging structure, is covered in the sensing element outside;Resistance measurement circuit, with cold-pressing terminal electric connection, resistance measurement circuit adopts four-wire system measurement layout, and integrated with constant-current source, differential amplifier, 24 bit analog-digital converter and the PT1000 temperature sensor for temperature compensation;Data acquisition and communication module are connected with the output end of resistance measurement circuit.By using NiTi shape memory alloy wire as core sensing element, combined with cold-pressing terminal fixing process and double-layer protection packaging structure, while ensuring that sensing element high sensitivity and fatigue resistance characteristics, significantly improve the environmental adaptability of device, provide high-precision, long life, strong adaptability comprehensive solution for large bridge structure health monitoring.

The utility model relates to the technical field of on-site data acquisition, in particular to an on-line temperature self-compensating circuit of a transmitter for force measurement. The temperature self-compensating circuit comprises a double-path precision constant current source module which is composed of a high-precision reference voltage source, an operational amplifier and a sampling resistor and is used for providing equivalent excitation current for a working strain gauge and a temperature compensating gauge; the signal acquisition module comprises an embedded MCU and an external signal conditioning chip, a 24-bit ADC is integrated in the MCU and used for acquiring differential voltage signals of the working strain gauge, and a 24-bit ADC of the external signal conditioning chip is used for synchronously acquiring differential voltage signals of the temperature compensation gauge. According to the utility model, the temperature drift interference introduced by the adjustment of a traditional potentiometer is eliminated from the circuit level through the symmetric excitation architecture of the double-path precise constant current source module and the differential decoupling design of the synchronous ADC signal acquisition module.

The invention provides a smart home anomaly detection system and method, and the system comprises an equipment identification layer module, a verification layer module and an anomaly processing layer module, and also comprises the following steps: S1, generating an equipment unique identifier through a CID-Gen algorithm, and enabling the expression of the equipment unique identifier to be as shown in the specification; in the formula, an SHA-256 hash function is used for converting input of any length into 256-bit fixed-length output, MAC is the last 24-bit of a physical address of equipment and ensures uniqueness of the equipment, and Ts is a UNIX timestamp accurate to microseconds. According to the method, a brand-new safety protection system is constructed through a triple core innovation mechanism, firstly, a hardware-level identification solidification scheme is adopted, and the hardware-level identification solidification scheme is adopted; a global unique identifier is generated based on a space-time composite algorithm CID-Gen, the entropy value of the global unique identifier reaches 256 bits, compared with 122 bits of traditional UUIDv4, the global unique identifier is greatly improved, and a system architecture adopts a layered design and is composed of three modules including an equipment identification layer, a verification layer and an exception handling layer.

The invention belongs to the technical field of Internet of Things equipment access management, and particularly relates to an MAC address storage method, an MAC address verification method and an MAC address verification device. The method comprises the steps that an MAC address is preprocessed, a 48-bit unsigned binary number is obtained, the high 24 bits of the MAC address are OUI manufacturer codes, and the low 24 bits of the MAC address are device identifiers; taking the high 24 bits of the 48-bit unsigned binary number as a bucket index, and searching a container in a bucket; and storing the MAC address in the searched barrel inner container according to an updating mode corresponding to the container type of the searched barrel inner container. According to the method, an OUI defined by IEEE and a Roaring Bitmap data structure are deeply integrated for the first time, MAC high 24-bit OUI is directly used as a bucket key, and the conflict risk of Hash bit reduction operation is avoided; and the containers are switched in real time based on the density of data in the buckets, and memory use is optimized.

The utility model provides a shared crystal oscillator high-speed acquisition circuit, which belongs to the field of data signal acquisition and processing, and comprises a plurality of external data acquisition channels which are connected in parallel on the same pin of a circuit board chip in a mode of sharing crystal oscillator pins and clock lines in the data acquisition channels; the plurality of external data acquisition channels are completely the same, the main body of each data acquisition channel is an analog-to-digital converter, and the analog-to-digital converter is a 24-bit analog-to-digital converter with an ultra-low noise amplifier, and the model of the analog-to-digital converter is CS5530; a sensor information data output port, a serial data input port, a serial data output port, a serial data communication clock port and an oscillator port are reserved in a bus of the analog-to-digital converter; and the sensor information data output port and the serial data output port are connected with pins of the circuit board chip.