57 results about "Meter-Bus" patented technology

A receiver particularly suited for an M-BUS is described. During transmission, the receiver is disabled. After each transmission, nodes and states in the receiver are set to prepare the receiver to receive a signal. Once data is sensed, a feedback loop clips the input signal to the receiver to limit the swing of the input signal. The line of the power supply at the lower potential is modulated, rather than modulating the line at the higher potential, for the transmission of data.

The invention provides a main control circuit of a centralized meter reading system. The main control circuit comprises a main chip, a power module, an SRAM (Static Random Access Memory) data storage module, a clock module, a man-machine operation interface, an SD (Secure Digital) card, an LCD (Liquid Crystal Display) liquid crystal display screen, a GPRS (General Packet Radio Service) wireless communication module, an MBUS (Meter-Bus) channel selection module, an MBUS communication module, a 485 communication module and an RS232 converter, wherein the power module is used for providing voltages. The communication modes of the main control circuit are optionally wireless and wired modes; the GPRS remote communication function is capable of providing reliable operations and high-efficiency operations for remote monitoring and operations; meanwhile, a concentrator and meters are connected in two manners of 485 and MBUS, and therefore, the main control circuit is simple and convenient in construction and good in compatibility with commercial heat meters; in addition, the MBUS communication module is matched with the MBUS channel selection module, and simultaneous working of a plurality of channels and district networking are realized by virtue of channel selection, and therefore, the market requirements are met to the utmost extent; the whole circuit is good in data acquisition effect and high in instantaneity and accuracy; besides, real-time reliable operations can be realized by use of the man-machine operation interface.

The invention discloses a wireless meter reading system which comprises a plurality of meters, data acquisition devices, an MBUS (Meter Bus) module, a concentrator, a DTU (Data Transfer unit) and a WEB server. According to the wireless meter reading system, real-time data of different frame structures of the meters are converted into real-time data of a unified standard frame structure by adopting an MBUS, so that the aim that the real-time data of a variety of meters are obtained in a unified manner is realized, the efficiency of the meter reading system is then increased, and the problem that the work efficiency of the meter reading system is reduced caused due to the fact that the usage amount of the meters cannot be obtained in the unified manner is solved. In addition, the real-time data, i.e. the usage amount, of all the meters are displayed in a web page in a GIS (Geographic Information System) map form by adopting the WEB server, so that users can view the usage amount of the meters at any time through webpage login, and then, the users can conveniently know the usage amount of the meters.

The invention provides a communication method of an M-BUS (meter-BUS), and the method is suitable for a slave in an M-BUS system to receive signals sent by a host. The slave comprises a singlechip, a communication interface module, a direct current supply module and other functional modules, wherein the communication interface module comprises a bridge rectifier circuit and a resistance voltage division circuit. The method is characterized in that after the signals of the M-BUS system host, which are input into the slave, are rectified by a rectifier bridge, the voltage of the signals is divided by a resistance network, the signals subjected to voltage division are directly connected with the input port of an ADC (analog to digital converter) an ADC module is used for measuring the input signals, the boundary thresholds of the high and low electric signals input via the M-BUS are computed according to the values obtained after measurement, after setting of the boundary thresholds is completed, the ADC module or an analog comparator module is started and communication monitoring on the signals input via the bus is completed by comparing the input signals with the boundary thresholds, thus achieving a communication data receiving function. The slave has the characteristics of strong antijamming capability and low cost.

The invention discloses an intelligent meter house. An electric energy meter is arranged in a container; the meter house comprises a meter house main body; an identifying mechanism, a conveying mechanism, a storage mechanism and a controlling system are arranged in the meter house main body. By adopting the technical scheme, through arranging the identifying mechanism, the conveying mechanism, the storage mechanism and the controlling system in the meter house main body, the identifying mechanism, the conveying mechanism, the storage mechanism and the controlling system are effectively combined; through the match among the mechanisms, the automation of in and out of the electric energy meter is realized; the participation of workers in the whole process is reduced; lots of manpower is not needed; the whole system is convenient to manage and control.

A self test adapter (STA) for automatic test equipment (ATE) is provided. The STA includes an enclosure. A backplane is housed by the enclosure. A dual data bus is integrated into the backplane. At least one STA card module is inserted into the backplane. The at least one STA card module has a port for interconnection with an ATE station receiver. The at least one STA card module includes a generic region adapted for interfacing with an additional STA card module over the dual data bus, and a resource specific region adapted for self test of at least one ATE station resource.

An electric meter base bracket apparatus and system. Embodiments include a meter bracket installed between studs of a dwelling or structure having. The bracket includes several holes to install the bracket to the studs as well as feed-through holes for wiring to the dwelling. Bolts are included on the bracket to attach directly to the meter base. A hole can be cut through the siding so that the meter base and the bracket can connect. In dwellings having brick, the meter base is typically set further from the studs due to spacing left between the brick and the studs. As such, the invention further includes an extension that connects directly to the bracket on one side and to the meter base on the other side. An alternative embodiment of the meter base bracket includes a variable size feature.

The invention aims to provide a remote meter reading method of a public utility meter. In the method provided by the invention, an improved and encrypted M-Bus (meter bus) transmission mode is adopted, thus the transmission mode is simplified. In order to achieve the effects, in the remote meter reading method of the public utility meter provided by the invention, a host and a slave are adopted, and the host is in communication connection with the slave through a bus and provides working power for the slave. The method comprises the following steps: a communication configuration step, a encryption step and a communication step which are carried out between the host and the slave, wherein the communication configuration step comprises a bus initialization step and an equipment determination step; the communication step is carried out after the encryption step; the communication step comprises a data reading step and a transmission interruption step after the communication step; the data reading step comprises data requesting; the slave replies and reads the data; the receiving processing is carried out on the data through the slave; and the receiving processing is divided into interruption receiving processing and link layer processing. Because the technical scheme of the invention is adopted, the M-Bus can be used for conveniently and safely realizing the functions of starting the networking and remote meter reading of meters such as an electricity meter, a water meter, a heat meter and the like.

The invention discloses a data receiving device for a Meter-BUS (M-BUS) bus master station. In the data receiving device, a small-capacity current sampling resistor is connected in series in an M-BUS bus and the M-BUS does not have voltage drop basically, and has high slave station-carrying capacity and remote communication distance; voltage drop signals at both ends of the current sampling resistor are detected by adopting the differential current detection technology and are subjected to differential amplification, so the inhibiting effect on a common-mode input (interference) signal and the amplification effect on a difference-mode input (effective) signal are achieved effectively, and the sensitivity and interference resistant capacity are high; the receiving device has the function of the automatic adaption of loads and can adapt to the change of the bus loads automatically, so that data are received stably and reliably; and a current signal of the M-BUS bus is consistent with demodulated receiving data, is undistorted and does not influence data communication.

The invention provides a no-shutdown meter changing structure of an insertion-typed electric energy meter, consisting of an electric energy meter and a meter base; wherein, the electric energy meter comprises a meter shell, a plug, a metering mechanism, a flange and an insertion rod; the meter base comprises a base body, a cover plate, a hole-shaped spring, a convex edge, an inlet wire, an outlet wire, an upper spring leaf and a lower spring leaf. After the electric energy meter is inserted into the meter base, the insertion rod passes through a through hole at the upper edge of the upper spring leaf and pushes the upper edge of the lower spring leaf to be open; the power is turned on by the electric energy meter; and after the electric energy meter is pulled out, the power is turned on by the upper spring leaf and the lower spring leaf. The no-shutdown meter changing structure solves the problem that the insertion-typed electric energy meter is changed without turning off the power.

A power supply providing current interruption based on the energy from the supply over a sliding window of time is disclosed. The output current from the supply is periodically reestablished.

The invention relates to a low power consumption power supply circuit of a meter bus slave computer, which belongs to the technical field of instruments and meters and comprises a constant voltage source circuit with high pressure resistance and low quiescent current and a low-pass filter circuit, wherein two triodes which are connected into a Darlington form are used as an emitter follower of the constant voltage source circuit, the base electrode of the emitter follower is connected with a standard voltage generated by a voltage reference, and a voltage with low output resistance is output from an emitter to form a constant voltage source; the low-pass filter circuit is formed by connecting a resistor with a low resistance value and a capacitor in series; and the emitter of the emitter follower is connected with the resistor of the low-pass filter circuit. Compared with the solution of the prior art, the current consumption of the slave computer in a dormant state is greatly reduced on the basis of not increasing the cost of the single slave computer, thus the overall energy consumption is reduced, and meanwhile, the number of the slave computers of a traditional meter bus network can be greatly increased, and the nodes of the meter bus network can be increased. The low power consumption power supply circuit of the meter bus slave computer is particularly suitable for low power consumption meter bus systems, such as water meters, gas meters and the like.

The invention relates to a meter-bus data collector with ultra-low power loss. The meter-bus data collector comprises a main CPU module integrated with a universal asynchronous receiver/transmitter (UART) chip, a clock module, a memorizer and an RS-485 communication module. The meter-bus data collector is characterized in that the main CPU module employs a 16-bit Flash type MSP 430 series ultra-low power loss singlechip computer waken up by the clock module; and the RS-485 communication module is isolated by a high-speed isolation chip, is waken up by the clock module and is provided with an M-bus communication collection module for collecting the data. The power loss of the meter-bus data collector is 1/20 that of a conventional data collector. The meter-bus data collector can save a lot of energy for long-term running, can collect the data according to collection solutions during running process, has relatively high collection reliability, and can mark metering devices having faults, so that the faults can be found and dealt with as early as possible, thereby facilitating reducing metering loss. The meter-bus data collector has relatively high communication speed with no need of frequently reading meter, so that the power consumption of the system can be further reduced.

The invention discloses an intelligent remote metering control system for cities and towns. The intelligent remote metering control system comprises meters, data acquisition units, a concentrator and a monitoring management center, wherein the data acquisition units are used for receiving read data and analyzing, storing and quantizing the read data and are connected with the concentrator through a USB (universal serial bus); the concentrator is used for managing a field lower computer, acquiring data, communicating with the monitoring management center and sending meter data acquired by the data acquisition units to the monitoring management center; the monitoring management center is used for sending a command for controlling the meters, reading the data and storing and analyzing the data and is connected with a client terminal and an internal terminal through an Internet network; and the data acquisition units are arranged in buildings in a residential area and connected with the meters through an MBUS (meter bus) in a one-to-one correspondence way. The intelligent remote metering control system has the advantages of high reading speed, high calculation accuracy and good meter reading practicality; and the labor intensity of meter reading workers is greatly reduced and meter reading errors caused by human factors are reduced.

The invention relates to a centralized power supply method implemented by the aid of an M-Bus (meter-bus). The centralized power supply method is implemented by an M-Bus host and driven equipment connected with the M-Bus host, the driven equipment consists of a voltage reduction module, a communication module, a controller and an electric unit, the voltage reduction module can directly convert current outputted by the M-Bus host into working current of the electric unit so that the electric unit is driven, the communication module is used for communicating with the M-Bus host, and the controller is used for controlling operation of the voltage reduction module and operation of the electric unit. By the aid of the method, the driven equipment can be powered without a battery or an additional power source, the existing M-Bus is directly used for supplying power, installation and maintenance costs are low, and usage is safe, reliable and pollution-free.

The invention discloses a steering engine gear rack precision value comprehensive detection device and test method. The device comprises a pedestal (1) which is provided with a workpiece place bench (2) for controlling and adjusting workpiece positions, and a meter base (3) for installing and supporting a measurer (4); the direction of the measuring meter hand of the measurer (4) is vertical to the axial direction of the support workpiece of the workpiece place bench (2); the pedestal (1) is provided with a guide sliding device; along the guide sliding device, the meter base (3) can drive the measurer (4) to move along a parallel axis direction. According to the invention, the test method combines a traditional standard measuring tool and a tool structure, and integrates the separate measurement of the circular runout and linearity of an elongated rod in a traditional measurement method into a same measurer; in a measuring process, clamping is finished once, precision index detection items of a gear rack are simultaneously measured, and measurement data accuracy and efficiency are guaranteed.

The invention discloses a control system and method of a modularized autonomous underwater exploration robot. The control system of the modularized autonomous underwater exploration robot comprises anintelligent bus, an intelligent navigation control node, an intelligent exploration node, an intelligent propulsion node and an intelligent energy node. The intelligent bus is composed of an energy bus, a kilomega network communication bus, a CAN communication bus, a photo-communication bus, a synchronization bus and an emergency bus. According to the control system and method, through the designof the intelligent bus and the intelligent nodes suitable for the exploration type underwater robot, the modularization, reliability and expandability of the control system are fully guaranteed, andmeanwhile the hardware conditions needed for expanding other optics and harmonics exploitation devices applied to underwater environments are met. The design method of the distributed control system of the modularized autonomous underwater exploration robot is provided. When the control system is designed, the factors such as electromagnetic compatibility, acoustic compatibility, high/low-speed data communication, fault detection and self-relief measures are taken into full consideration.

The invention belongs to the field of automatic data acquisition technologies and relates to an M-BUS circuit and a multi-mode communication multi-protocol water meter collector. The M-BUS circuit comprises a data transmitting circuit, a data receiving circuit and a protection circuit; the data transmitting circuit comprises a power source control circuit, an overcurrent detecting circuit and an external connection bus circuit; the input end of the power source control circuit is connected with the output end Mbt of an MCU; the output end of the power source control circuit is connected with the input end of the external connection bus circuit; the first output end and second output end of the external connection bus circuit are respectively connected with the first end AO and second end BO of a water meter bus; the output end of the overcurrent detecting circuit is connected with the detecting end Dec of the MCU; and the input end of the overcurrent detecting circuit is connected withthe external connection bus circuit. The multi-mode communication multi-protocol water meter collector includes an uplink communication unit, a downlink communication unit, and the M-BUS circuit.

The invention discloses a receiving circuit of a meter-BUS (M-BUS) master station and a data receiving method for the receiving circuit, and aims to provide a receiving circuit, which is stable and reliable and has a self-adaptive communication band rate, of the M-BUS master station and the data receiving method for the receiving circuit. In order to solve the problem, the receiving circuit of the M-BUS master station comprises a current monitoring unit, a digital-to-analog (DA) conversion circuit, a comparator and a current/voltage conversion circuit, wherein the current monitoring unit monitors loop current in real time; the DA conversion circuit produces a reference voltage of the comparator; and the comparator compares the reference voltage produced by the DA conversion circuit with voltage produced by the current/voltage conversion circuit to obtain current change of an M-BUS circuit and module return data.

The invention provides a remote water meter data collection system. The system comprises a water quantity user unit, a data collection unit, an interface converter, a concentrator, a system master station and a data management layer, wherein the water quantity user unit is provided with an MBUS (Meter Bus) communication module; the data collection unit transmits water utilization data to the concentrator; the concentrator transmits water utilization data to the system master station; the system master station is connected with the concentrator in a full two-way channel; the data management layer receives, analyzes and stores the water utilization data of multiple water meters through the system master station and displays the data on the data management layer; the data management layer isfurther provided with a recharge module; and the recharge module is used for recharging the corresponding water meter. By adopting the remote water meter data collection system provided by the invention, the problem of existing manual meter reading is solved, automatic collection of water meter data is implemented; the collected data are accurate, the work efficiency is high, and the urge of fee payment is not required.

The invention relates to an MBUS-based power supply communication device and method. The device comprises a modulation/demodulation circuit, a rectifying circuit, a high-voltage charging circuit, a voltage conversion circuit, a low-voltage charging circuit and a voltage threshold control circuit; the modulation/demodulation circuit is used for demodulating a voltage pulse sequence in MBus into a TTL (Transistor-Transistor Logic) level signal and transmitting the TTL level signal to slave equipment, and modulating the TTL level signal of the slave equipment into a current pulse sequence and transmitting the current pulse sequence to the MBus; the rectifying circuit is used for converting a nonpolar MBus signal into a 20-42V high-voltage direct-current signal; the high-voltage charging circuit is used for charging a first energy storage unit at a constant current by using the high-voltage direct-current signal; the voltage conversion circuit is used for converting the high-voltage direct-current signal into a low-voltage direct-current signal not more than 5V; the low-voltage charging circuit is used for charging a second energy storage unit at a constant current by using the low-voltage direct-current signal; the voltage threshold control circuit is used for allowing the second energy storage unit to supply electric energy to the slave equipment under the condition that the voltage of the second energy storage unit reaches a preset voltage threshold. According to the device and the method, the stability and the reliability of MBus are improved.

The invention relates to an M-BUS (METER-BUS) slave communication circuit. The invention aims at providing an M-BUS slave communication circuit with low cost. According to the technical scheme for solving the problem, the M-BUS slave communication circuit is characterized by comprising a transmission circuit, a receiving circuit and a power supply circuit which are connected to one point mbuss, wherein the transmission circuit comprises a PNP-type triode Q4 and an NPN-type triode Q6, and a collector of the triode Q6 is connected with the point mbuss; the receiving circuit comprises a conversion circuit, wherein the input end of the conversion circuit is connected with the point mbuss, the output end of the conversion circuit is connected to a slave MCU, and the conversion circuit is used for converting the high-low electrical level at the point mbuss into a stable high-low electrical level signal which can be recognized by the slave MCU. The M-BUS slave communication circuit is mainly used for constructing a communication network among an intelligent electric meter, a customer display unit, a water meter and a gas meter.

The invention relates to a power circuit of a meter bus slave, belonging to the technical field of apparatus meters. The programmable power circuit of the meter bus slave consists of a program-controlled reference voltage generating circuit and an emitter follower, wherein the program-controlled reference voltage generating circuit consists of resistors, two voltage-stabilizing diodes, a reinforced NMOS (n-channel metal oxide semiconductor) tube and a singlechip MCU (micro control unit); a resistor R1 is serially connected with the two voltage-stabilizing diodes; the reinforced NMOS tube which is connected with one voltage-stabilizing diode in parallel is connected with a grid electrode of an NMOS tube VM through an I/O (input/output) port of the singlechip MCU; a resistor R2 is connected between the I/O port of the singlechip MCU and the grid electrode of the NMOS tube VM; a resistor R3 is connected between the I/O port of the singlechip MCU and a positive power supply; the emitter follower comprises two dynatrons V1 and V2 which are connected in a Darlington way; collector electrodes of the two dynatrons V1 and V2 are connected with a high voltage end of the meter bus; emitter electrodes of the dynatrons are connected on a slave load RL; and a substrate of the emitter follower formed by the two dynatrons is connected with the output of the program-controlled reference voltage generating circuit.