Disclosed is a field device electronics for a field device of automation engineering, comprising: first and second terminals for connecting the field device electronics to a cable for an electrical input current to the field device electronics; a series regulator to set the input current; a shunt regulator following the series regulator; a first capacitance connected in parallel with the shunt regulator for energy storage; a supply circuit connected in parallel with the shunt regulator and the first capacitance for providing an operating voltage; and connected after the supply circuit and supplied by the operating voltage, a control unit adapted to register a buffer voltage lying across the first capacitance, based on the registered buffer voltage, to make a decision concerning at least one part of the field device electronics.

A circuit for processing a logic input, including a first comparator capable of comparing the logic input with a first reference voltage and of providing a logic output at a first output logic level if the logic input is higher than the first reference voltage and otherwise at a second output logic level different from the first output logic level. The power supply of the first comparator and the first voltage reference are activated by the logic input.

An electronic device includes a first graphic composer that composes first graphic data associated with a layer of a first composition type, a second graphic composer that composes second graphic data associated with a layer of a second composition type different from the first composition type. The electronic device also includes a processor that sets a composition type of each of a plurality of layers associated with at least one application to the first or second composition type, composes first graphic data corresponding to a layer set to the first composition type using the first graphic composer, compose the composed graphic data in the frame buffer and second graphic data corresponding to a layer set to the second composition type using the second graphic composer, and display the composed graphic data through a display connected with the electronic device.

Systems and methods are disclosed to improve energy efficiency of a farm with livestock wastes by generating a cooling, heating, and power (CCHP) microgrid model; performing on a computer a multi-objective optimization to improve system efficiency of energy utilization and reduce environmental problems caused by animal wastes; and displaying results of the optimization for review.

Disclosed is a hierarchical management method and system for a terminal device. The terminal device comprises at least one control system, and at least one peripheral apparatus, which is connected to the control system. In the method, when a terminal device receives a wake-up signal during dormancy, a control system corresponding to the wake-up signal is woken up, and the control system in a wake-up state grades an operation mode of the control system according to a data load; and according to the operation mode, a peripheral apparatus that needs to perform data processing is woken up.

Systems and methods are provided and include a variable frequency drive configured to drive a fan motor of an HVAC system to ventilate an indoor space, the HVAC system having a cooling assembly that includes at least one of an economizer and a compressor. A controller is configured to communicate with the variable frequency drive, receive at least one signal from an occupancy sensing device, determine whether the indoor space is less than fully occupied based on the at least one signal, and control the variable frequency drive to reduce a speed of the fan motor in response to determining that the indoor space is less than fully occupied.

An energy-reducing method and apparatus for retrofitting a single zone, constant volume HVAC system, with or without an economizer, that provides heating, cooling, and ventilation to occupants within a building space. The present invention includes the introduction of a programmable logic controller and variable frequency drive (VFD) that takes control of the existing fan, heating, cooling, and optional economizer operation. The reduction of the fan speed in the ventilation mode when the 100% operation is not needed saves significant energy of the existing constant volume HVAC system where the fan motor is designed to run 100% of the time.

A sensing device includes a power supply, a sensing element, a communication element, a controller and a microprocessor. The controller is configured to control the sensing element and the communication element. The microprocessor is configured to be activated from the sleep state periodically according to a time period. The microprocessor is configured to control the power supply to supply power to the controller, the sensing element and the communication element, such that the sensing element senses the environment to acquire a plurality of sensing values. After the communication element transmits the sensing values to a server, the microprocessor controls the power supply to stop supplying power to the controller, the sensing element and the communication element, and also the microprocessor enters the sleep state.

A circuit for processing a logic input, including a first comparator capable of comparing the logic input with a first reference voltage and of providing a logic output at a first output logic level if the logic input is higher than the first reference voltage and otherwise at a second output logic level different from the first output logic level. The power supply of the first comparator and the first voltage reference are activated by the logic input.

Disclosed is a field device electronics for a field device of automation engineering, comprising: first and second terminals for connecting the field device electronics to a cable for an electrical input current to the field device electronics; a series regulator to set the input current; a shunt regulator following the series regulator; a first capacitance connected in parallel with the shunt regulator for energy storage; a supply circuit connected in parallel with the shunt regulator and the first capacitance for providing an operating voltage; and connected after the supply circuit and supplied by the operating voltage, a control unit adapted to register a buffer voltage lying across the first capacitance, based on the registered buffer voltage, to make a decision concerning at least one part of the field device electronics.