CN201654106U - Multi-group power measurement transmission device with full-time and multi-time-sharing measurement - Google Patents

Abstract

The utility model discloses a multiunit power measurement transmission device with measure in full time and multiplex timesharing, contain a small-size measurement transmission body that has wireless transmission function and a multiunit electric current inspection input device rather than linking to each other, but for cooperating the switch box and install and constitute, can measure the power consumption of each power along separate routes of total power and multiplex timesharing measurement in full time, and via the wireless Zigbee interface of measuring transmission body built-in, with the power consumption situation of total power and each return circuit in the block terminal, convey outside monitored control system, with the purpose that reaches electric power information and collect, and the needs that energy-conserving carbon reduction and power consumption safety pushed away the exhibition.

Description

Multi-group power measurement transmission device with full-time and multi-work time-sharing measurement

technical field

The utility model relates to the design of a multi-group power measurement transmission device with full-time and multi-work and time-sharing measurement. It uses the smallest volume and lowest cost framework to measure the power consumption of the total power supply and each branch power supply in the distribution box. Information, such as the collection of power consumption information of the power switch boxes of households and small low-voltage power users, etc., because the volume is small, and multiple sets of power sources must be measured and transmitted together, so a very special solution is required, which is extremely simple and automatic The calibrated power measurement structure and a small wireless transmission module (such as Zigbee wireless transmission technology) can achieve the design technology of using wireless and monitoring devices to connect to the network and collecting power information of the power switch box. the

Background technique

Today's power measurement is mostly a power meter or a power meter to measure a circuit, and use a wired transmission interface such as RS-485 to transmit the measured power information to the monitoring device. Therefore, in a power distribution box with a small space For the purpose of measuring the electricity consumption information of each circuit, multiple power meters or multiple meters and communication wiring between them are required, which is not only insufficient in space, unsafe, but also too expensive to be popularized. the

Utility model content

The main purpose of the utility model is to provide a multi-group power measurement and transmission device design with full-time and multi-work and time-sharing measurement. It is a multi-group power measurement and transmission device with simple structure, few wiring, and small volume. It includes a common measurement voltage input and a small measurement transmission body with a built-in wireless transmission device, and a multiplex current detection input device composed of multiple groups of detachable current transformers. The multiplex current detection input device Connect the main power supply and each branch power supply. The measurement transmission body is connected to the multiplex current detection input device, which can be properly installed and composed in conjunction with the power switch box. For example, the measurement transmission body and the multiplex current detection input can be connected during implementation. The devices are all installed in the power switch box at the same time, or the measurement transmission body can also be individually drawn out and installed outside the power switch box, so as to form a system that can measure the total power supply full-time and each branch power supply in time-division multiplexing. Power consumption status, including information such as voltage, branch current, power consumption and cumulative power consumption, and share a wireless transmission device (such as Zigbee) to transmit the measured information to an external monitoring system. the

Wherein, the measurement transmission body is connected with a set of total power input lines, and a power line sleeve is arranged on the outside of the total power input lines; the measurement transmission body is also connected to a plurality of detachable current comparators The composed current detection input device forms a connection, wherein the two current comparators with larger currents are set on the input end of the main power supply, and the other current comparators with smaller currents are set on other branches. Each current comparator The detection signal plug is inserted into the current detector detection signal socket. the

The multi-group power measurement transmission device of the utility model has full-time and multi-work time-sharing measurement, and its composition structure includes a power supply and isolation circuit, a full-time power measurement circuit, a time-sharing power measurement circuit, a voltage detection isolation processing circuit, and a multi-group Current detection and isolation circuit, time-division multiplexing processing circuit, Zigbee transmission interface circuit, microprocessor circuit and peripheral control circuit, including:

Power supply and isolation circuit, connected to the main power supply, used to obtain various low-voltage DC power supplies from the total power supply voltage to be tested by using the switching power supply circuit;

The voltage detection isolation processing circuit is connected to the main power supply, and is used to obtain the voltage signal amplitude required by the power measurement circuit at a fixed ratio from the mains voltage to be measured, and completely electrically isolate the voltage signal from the mains power to be measured;

Multiple sets of current detection and isolation circuits are connected to the main power supply and each branch power supply for detecting the total current and the current of each branch power supply; the detection signals of the multiple sets of current detection and isolation circuits are provided by a detachable The current comparator is obtained, and the opening of the detachable current comparator is opened to allow the wire to be tested to pass through the core hole of the current comparator, and then the opening is closed. Each set of current comparators provides a set of ratios to the detected wire current The voltage signal of the signal is given to the time-division multiplexing processing circuit;

The full-time power measurement circuit is connected to the voltage detection isolation processing circuit and multiple sets of current detection and isolation circuits, and is used to receive the total power supply voltage signal from the voltage detection isolation processing circuit and the total signal from multiple sets of current detection and isolation circuits. Power supply current signal; After the two signals are measured by full-time power, the power measurement and power accumulation results are sent to the microprocessor and peripheral control circuits for processing into the total power supply information to be sent later;

The time-division multiplexing processing circuit is connected to the multiple groups of current detection and isolation circuits, and is used to switch the current signals from multiple groups of current detection and isolation circuits in time-sharing, convert the current signals into voltage signals, and switch The voltage signal sensed by each group of current counters is sent to the time-sharing power measurement circuit;

The time-sharing power measurement circuit is connected to the voltage detection isolation processing circuit and the time-division multiplexing processing circuit, and is used to receive the total voltage signal from the voltage detection isolation processing circuit and each branch current signal from the time-division multiplexing processing circuit , measure and accumulate the power information of each branch in a time-sharing manner, the time-division multiplexing processing circuit switches the current signal of each branch at a fixed and accurate time, and the time-sharing power measurement circuit synchronously cooperates with the power Measure and accumulate electric energy, and send the results of each branch to the microprocessor and peripheral control circuit to process the power measurement information of each branch in time-sharing, and calculate the ratio of the program to restore the real power information of each branch;

Microprocessor and peripheral control circuit, connected with the full-time power measurement circuit, time-sharing power measurement circuit and time-division multiplexing processing circuit, used to process and calculate the data of full-time and time-sharing power measurement, and convert it into a real total power supply And the power and consumption information of each branch power supply, and through the Zigbee transmission interface circuit, use the wireless communication method to connect the measured power information with the external monitoring system;

The Zigbee transmission interface circuit is connected to the microprocessor and the peripheral control circuit, and is used to transmit the measured power information to the external monitoring system that also has the Zigbee transmission interface through the built-in Zigbee wireless transmission module, and automatically forms with the external monitoring system network. the

The secondary purpose of this utility model is to provide a multi-group power measurement transmission device design with full-time and multi-work time-sharing measurement, which can provide an external monitoring system to collect the total power supply and the cumulative power consumption information of each circuit. The monitoring system can Through these data, the statistics and analysis of energy consumption are completed, so as to achieve the purpose of energy management, energy saving and carbon reduction. the

Another purpose of this utility model is to provide a multi-group power measurement transmission device design with full-time and multi-work time-sharing measurement, which can provide a monitoring system to collect real-time power consumption information of the total power supply and each branch, including real-time power consumption And current and voltage, etc., the monitoring system can use these data to judge whether the power consumption is abnormal and whether it is safe, and can issue warnings in real time, and can also store measurement data and draw various reports such as power trend diagrams. the

Description of drawings

Fig. 1 is a diagram of the composition of the multi-group power measurement transmission device with full-time and multi-work and time-division measurement of the utility model. the

Fig. 2 is a composition diagram of the measurement and transmission body of the utility model. the

Fig. 3 is a diagram of the composition of the multiplex current detection input device of the present invention. the

Fig. 4 is a schematic diagram of the configuration of the utility model applied to a single-phase three-wire household power distribution box. the

Fig. 5 is a structural block diagram of a multi-group power measurement transmission device with full-time and multi-work time-division measurement according to the present invention. the

Fig. 6 is a circuit diagram of a multi-group power measurement transmission device with full-time and multi-work time-division measurement of the present invention. the

Fig. 7 is a circuit diagram of a multi-group power measurement transmission device with full-time and multi-work time-division measurement of the present invention. the

Part Name:

1.1 main power cord

1.2 Power cord set

1.3 Measurement and transmission body

1.4 Current measurement line (including fixed sleeve)

1.5 multiplex current detection input device

1.6 total power current detection detachable current comparator (100A)

1.7 shunt current detection detachable current comparator (60A) 

1.8 Current detector detection signal plug

1.9 Current detector detection signal socket

1.31 Upper cover nameplate

1.32 Operate the touch panel

1.33 cover

1.34 Zigbee wireless transmission module

1.35 power measurement substrate

1.36 power isolation voltage comparator

1.37 lower cover

1.51 shell seat

1.52 switch circuit board. the

1.53 Integrated circuits for multiplex switching

1.54 connector

4.1 Total power input

4.2 Main power switch

4.4 General power wiring

4.10 shunt switch

Box 5.1 Power supply and isolation circuit

Box 5.2 full-time power measurement circuit

Box 5.3 Time-sharing power measurement circuit

Box 5.4 Voltage detection isolation processing circuit

Box 5.5 Multiple sets of current detection isolation circuits

Box 5.6 Time-division multiplexing processing circuit

Block 5.7 Zigbee transmission interface circuit

Box 5.8 Microprocessor and peripheral control circuit

Detailed ways

As shown in Figure 1, the multi-group power measurement and transmission device with full-time and multi-work and time-division measurement of the utility model, its preferred embodiment includes a group of common main power lines 1.1 through the power line sleeve 1.2 to a built-in measurement And the body 1.3 of wireless Zigbee transmission, and through a current measurement line (including fixed sleeve) 1.4 and a multiplexer composed of a plurality of (ten as shown in the figure) detachable current comparators 1.6, 1.7, etc. The current detection input device 1.5, when in use, put the two current comparators 1.6 (100A) with large currents as shown in the figure, and the buckle can be opened to cover the input end of the main power supply, and the other eight smaller current comparators 1.7 (60A) will be set on other branches. When in use, each choke detection signal plug 1.8 is inserted into the choke detection signal socket 1.9; and the voltage input is directly connected to the main power switch. On the one hand, Provide power for the internal circuit of the measurement and transmission body 1.3. On the one hand, take out the appropriate proportional voltage through the voltage comparator device inside the measurement and transmission body 1.3, and provide it for the full-time measurement and time-sharing measurement inside the measurement and transmission body 1.3 The voltage signal of the total power supply is obtained by induction on the input wire of the total power supply through two large detachable current comparators (CT) 1.6 sets, and directly enters the measurement circuit of the measurement and transmission body 1.3, so it can be obtained The full-time total energy consumption information of the power supply, while the current of other shunts is obtained through eight detachable CTs 1.7 pulled out from the current detection input device 1.5, which are respectively placed on the wires of each circuit for induction, and passed through the current detection input device 1.5. The internal time-sharing switching of the input device 1.5 measures the eight branch currents in turn, but through the calculation of the program, the energy consumption information of each circuit can still be obtained, and then through the wireless transmission built in the measurement and transmission body 1.3 The interface (preferably the wireless transmission interface using Zigbee technology) transmits the consumption information of the total power supply and each branch power supply in the switch box to the external monitor, so as to achieve the purpose of collecting power information and promoting energy saving and carbon reduction and electricity safety. needs. the

As shown in Figure 2, it is the composition form of the measurement and transmission body 1.3 of the present utility model, which mainly indicates the related structure and connection mode of the connected components, which includes an upper cover nameplate 1.31, an operation touch nameplate 1.32, a top cover 1.33, a Zigbee wireless transmission module 1.34, a power measurement substrate 1.35, a power isolation voltage comparator 1.36, of which:

A nameplate 1.31 on the upper cover is used to protect the Zigbee transmission module from being touched by external force;

1. Operation touch nameplate 1.32, available for touch operation, but electrically insulated;

One upper cover 1.33, which is used for assembling and fixing the internal measurement substrate and transmission module;

A Zigbee wireless transmission module 1.34;

1. Power measurement substrate 1.35;

A power isolation voltage comparator 1.36, which can isolate the power supply and provide the measurement signal of the common voltage;

The lower cover 1.37 is locked with the upper cover 1.33 by using screws, which is closely combined and secures the wire sleeves 1.4 (power wire sleeve and current measurement wire sleeve) at both ends;

1. Current measurement line (including fixed sleeve) 1.4, matched with the shape and groove of the shell mold, so that the connected wires are safe and stable;

Using the above components, in order to put the Zigbee wireless transmission module 1.34, the power measurement substrate 1.35, and the power isolation voltage comparator 1.36 into the upper cover 1.33 and the lower cover 1.37 and fix them together, and then put the upper cover nameplate 1.31 and the operation touch nameplate The plate 1.32 is locked and combined with the upper cover 1.33, and a matching and combined current measurement line (including a fixed sleeve) 1.4 (power line sleeve and current measurement line sleeve) is provided at both ends of the housing, so that the current measurement line (including a fixed sleeve) Set) 1.4 can safely and stably connect wires to form the measurement and transmission body 1.3 of the present utility model. the

Fig. 3 is the form of composition of the multiplex current detection input device 1.5 of the present invention. Switching integrated circuit 1.53 and a connector 1.54, wherein:

Shell seat 1.51 is the overall appearance of the molded body of the multiplex current detection input device;

The switching circuit board 1.52 is a current time-sharing switching circuit board, and its upper end is combined with a plurality of sockets 1.9 for detecting signals of current comparators. In this embodiment, 10 sockets 1.9 are provided in total to provide 10 Comparator signal input;

The integrated circuit 1.53 for multi-tasking switching is an integrated circuit (IC) providing multi-tasking switching, and is arranged on the switching circuit board 1.52;

Connector 1.54 is the connector of the current time-sharing switching board, and is matched and combined on the switching circuit board 1.52;

According to the above-mentioned components, it is composed of the socket 1.9, the switching circuit board 1.52, the integrated circuit 1.53 for multiplex switching, and the connector 1.54 which are fully encapsulated together by mold injection, and the other end of the connector 1.54 is connected to the power supply. The flow measurement line (including the fixed sleeve) 1.4 is used to form the multiplex current detection input device 1.5 of the present utility model. the

Figure 4 is a schematic diagram of the configuration of the utility model applied to a single-phase three-wire household power distribution box. As shown in the figure, it is the main power line 4.1, code-named L1, L2 and N, three power lines, wherein N is the ground wire, 4.2 The main power switch (non-fuse switch N.B) controls the opening and closing of the two live wires L1 and L2. After the main power switch, there are 8 shunt switches 4.10 in the figure (as shown in the figure), and the switches control eight respectively. The shunt power supply, as shown in the figure, is measured by the utility model transmission body 1.3, pulls out the total power supply connection 4.4, and is connected to the total power supply end of the total power switch 4.2, to obtain the total power supply voltage signal and provide the internal required of the utility model power supply. In addition, for the current detection part of the total power supply, two larger (100A) detachable current comparators 1.6, numbered 9 and 10 in the figure, are used to set them on the input lines L1 and L2 of the total power supply. In addition, there are 8 in the figure. A plurality of detachable current comparators 1.7 numbered 1 to 8 are set on the output power lines of each branch respectively, and each current comparator 1.6 or 1.7 is connected with a plug 1.8 as shown in the figure. 10 sockets 1.9 such as 1 to 10 arranged by the multiplex current detection input device 1.5, so as to complete the power measurement configuration of the overall main power supply and branch power supply of the entire distribution box. When the main power switch is ON, the measurement and transmission The main body measures the total power supply and each branch power supply in a time-sharing manner, and transmits the measured information through the built-in Zigbee wireless transmission module 1.34 of the main body 1.3, and transmits the power information through the distribution iron box for direct and external monitoring The equipment is automatically connected to a network to achieve the purpose of power collection. the

As shown in Figure 1 to Figure 4 above, it can be seen that the utility model can indeed provide a very simple and cheap way, and the power consumption status of the total power supply and each branch power supply inside the switch box can be obtained from the external monitoring system through wireless , to achieve the purpose of power information collection and the needs of energy saving and carbon reduction and the promotion of electricity safety. the

Fig. 5 is the functional block diagram of composition framework of the present utility model, and the main action of each block and association are explained as follows:

Block 5.1 power supply and isolation circuit mainly uses the switching power supply circuit to obtain various low-voltage DC power supplies required by the utility model from the total power supply voltage to be tested, and to achieve the purpose of electrical isolation from the mains. the

Box 5.2 full-time power measurement circuit is to continuously measure and accumulate the power information of the total power supply. The measurement signal, the voltage part comes from the total power supply voltage signal after the voltage detection and isolation processing in box 5.4, and the current part comes from multiple groups of box 5.5 Total supply current signal after current sensing and isolation. After the two signals are measured by the full-time power at block 5.2, the power measurement and electric energy accumulation results can be sent to the microprocessor and peripheral control at block 5.8 to be processed into the total power information to be sent later. the

Block 5.3 The time-sharing power measurement circuit measures and accumulates the power information of each branch in a time-sharing manner. The measurement signal, the voltage part comes from the total voltage signal after the voltage detection and isolation processing of the block 5.4, and the current part comes from the block 5.6 The current signal of each branch after time-division multiplexing processing. The time-division multiplexing switches the current signal of each branch at a fixed and accurate time. Block 5.3 Time-sharing power measurement is synchronously coordinated with power measurement and accumulated electric energy , and send the results of each branch to the block 5.8 microprocessor and peripheral control to process the power measurement information of each branch in time-sharing, and through the ratio calculation of the program, the real power information of each branch can be restored. the

Box 5.4 The voltage detection isolation processing circuit, its main function is to obtain the voltage signal amplitude suitable for the power measurement circuit at a fixed ratio from the mains voltage to be measured, and the voltage signal is completely electrically isolated from the mains power to be measured , to increase the safety of use. the

Block 5.5 Multiple groups of current detection and isolation circuits, the main function of which is to detect the total current and the current of each branch power supply, open the detachable (openable) current comparator (CT), and open the opening to allow the The wire passes through the core hole of the current comparator, and then closes the opening. At this time, the magnetic field generated by the wire to be tested due to the current will induce a current on the current comparator, and the current passes through the load of the current comparator (generally called resistance), it generates a voltage signal that is proportional to the current on the wire to be tested, that is, to complete the double purpose of current detection and electrical isolation. In other words, each set of current comparators can provide a set of ratios to the detected wire The voltage signal of the current signal is given to block 5.6 for time-division multiplexing. the

Block 5.6 is a time-division multiplexing processing circuit whose main function is to switch the current signals from multiple sets of current detection and isolation in block 5.5 in turn. The current signal is converted into a voltage signal here. This block is accurate and Fixed time ratio, switch the voltage signal induced by each group of current comparators to the block 5.3 Time-sharing power measurement, so that the purpose of using a group of power measurement circuits can measure multiple groups of circuits, and reduce material costs and volume . the

Block 5.7 Zigbee transmission interface circuit, its main function is to transmit the measured power information to an external monitoring system that also has a Zigbee interface through the built-in Zigbee wireless communication module of this block, and automatically form a network with the external monitoring system. To achieve the purpose of information link and communication. the

Block 5.8 microprocessor and peripheral control circuit are the control center of the present utility model, built-in control program, can process and calculate the information of full-time and time-sharing power measurement by block 5.2 and block 5.3, convert into real total power supply and The power and consumption information of each branch power supply, and through the block 5.7 Zigbee transmission interface, use wireless communication to connect the measured power information with the external monitoring system to achieve the purpose of collecting the total power of the distribution box and the power information of each branch. the

The utility model has the action principle and effect of each block of the multi-group power measurement transmission device with full-time and multi-worker time-sharing measurement as follows:

As shown in Figure 6, the block 5.1 is the power supply and isolation circuit. The contacts P1 and P2 in the figure are the main power input. L3 constitutes a filter circuit, RV1 is a surge absorber to prevent the surge from entering the power filter circuit; U3 is a switching voltage regulator IC (integrated circuit), and its working power is obtained from windings 4 and 5 of T1. Rectification and filtering of D5, C11, R13, C18, etc., D4, C7, R2, ZD1, and R5 constitute the pulse voltage elimination circuit caused by the switch U3. In addition to power conversion, T1 also electrically isolates the power supply and secondary Low-voltage circuit, the secondary low-voltage circuit passes through D2, C3, L1, C4, C5, D3, L5 and D6, EC3, R8, D7, C15 and other rectification and filter circuits to provide two power supplies, +5V and -1V respectively. Other circuits of the utility model are used, wherein the 5V part can obtain a stable 5V power supply through the feedback function of R22, R23, SHR1, R17, R18 and U4 optical isolation IC, while -1V uses the forward direction of D7LED The voltage is stabilized, and a negative voltage supply of about -1V is obtained. the

The total power input P1 and P2 are not only connected to block 5.1, but also connected to block 5.4 voltage detection isolation processing circuit. In the figure, the contact point of P1 passes through R9, R12, R16 and T2 to the contact point of P2, and T2 is an isolated PT. Coil windings 1-2 and 3-4 have the same number of coils, which means that the primary coil (1-2) and the secondary coil (3-4) flow the same magnitude of current, which means that the voltage on R20 is the same as P1, The voltage on P2 exists in a certain proportional relationship. In other words, through the isolation voltage comparator (PT) of T2, the total power supply voltage of P1 and P2 on the primary side can be indirectly measured on the load resistance of the secondary side coil, and it is related to the total The power supply is electrically isolated to avoid electric shock and increase safety. the

Box 5.2 Full-time power measurement circuit, U2 in the figure is the power measurement IC, the working time base of this IC comes from the X1 oscillating crystal, and the oscillating circuit composed of C16, C17, R10, etc., to generate a stable working frequency, and at the same time, through R11 to the block 5.3 The other power IC U1 shares this signal. The two signal sources required by the energy measurement IC U2, namely V1 and V2, are respectively connected to the current signal and voltage signal to be measured, and the current signal is connected to S1-2 and S1 in the figure via R4, R7, C8, and C10 On the contact of -3, the contact comes from the output of two detachable current comparators CT9 and CT10 in block 5.6, and the voltage signal is connected to the PT-1 and PT-2 contacts in the figure through R21, R15, C20, and C14 , the contact comes from the voltage signal on the secondary side 3 and 4 pins R20 of the isolation comparator T2 in block 5.4. These two signals are continuously connected to the V1 and V2 access pins of U2 at all times, so it is called full-time power measurement. The frequency of CF2 output in the figure is proportional to the measured value, and the frequency of CF2 is counted and processed by block 5.8, and the power consumption and cumulative value of the total power supply can be known. the

Block 5.3 Time-sharing power measurement circuit, U1 in the figure is the power measurement IC and U2 share the working time base signal, its working principle is similar to U2, the difference lies in the V1 and V2 of U1, and the control of the IC can be switched via U5, so in CF1 will have a variety of output information, although they are all output to the microprocessor of block 5.8 in the form of pulse signals, but because the U5 multi-tasking switching IC is controlled by the four control lines C3, C4, C5, and C6, CF1 will There are signals such as W, V, I, etc., and the power information of each branch, accumulated electric energy, voltage and current can be measured. the

As shown in block 5.5 of Figure 7, it is a multi-group current detection and isolation circuit. In the figure, CT1~CT8 are external detachable current comparators, and each current comparator corresponds to a load resistor, namely R24 and R25 , R26, R30, R36, R38, R42, R45, etc., the external detachable current comparator is to put the current comparator on the wire loop to be measured, induce the magnetic field of the wire, and the magnetic field cuts the current comparator coil to generate When the current flows through the connected load resistance, a voltage is generated at both ends of the resistance, and the voltage is proportional to the current of the wire passing through the CT core. In other words, the corresponding load resistance can be measured indirectly on each load resistance. The shunt current to be measured by each current comparator, and is electrically isolated. the

Block 5.6 Time-division multiplexing processing circuit mainly uses U8 one-to-eight linear switching IC for switching selection, that is, controls the potential of A, B, and C pins of U8, and can control the output pin, that is, S1-1 is connected to CT1~CT8 In other words, the microprocessor of block 5.8 controls A, B, and C of U8 in time-sharing through pins S1-4, 5, and 6, and then the eight to be measured can be selected. A group of shunt currents to achieve the purpose of time-division multiplexing measurement. In addition, CT9 and CT10 in the figure, and R41 and R47 are the detection current regulators of the total power supply. The total current detection signal detected by it has not been switched, and it is supplied to the block 5.2 Full-time power measurement at all times, and a complete total power supply can be obtained power information. the

Block 5.8 Microprocessor and peripheral control circuit, U11 in the figure is a microprocessor IC (μP), which contains programs and I/O, etc., its working time base is supplied by Y1, and U9 is a memory IC, which can store measurement data and power off Data can still be retained. In addition, D10 is the power indicator LED, which lights up once when the total power consumption is 1Wh, and is used for power correction. Numbers S1-4, S1-5, and S1-6 in the figure are used to select the shunt current measurement, C3, C4, C5, and C6 are used to control the energy measurement IC of the block 5.3 time-sharing measurement circuit, and the content of V1 and V2 of U1 , because U1 will multiply the two signals of V1 and V2, and output the measurement information in the form of pulses. Therefore, as long as the measurement procedures and steps are handled in the program of the microprocessor, the time-sharing power measurement IC can automatically The output CF1 of (U1) gets W (V1=V, V2=I, V×I), V (V1=V, V2=V, V×V=V2) and I (V1=I, V2=I, I ×I=I2), and then select the shunt current with multi-task time-sharing to obtain the W, V, I and Wh data of each group, and place them in the U9 memory IC by category. And it can communicate with the Zigbee communication module in box 5.7 through the TXD and RXD signal lines in the figure, so as to achieve the purpose of wireless transmission and networking of measurement data through Zigbee. the

Block 5.7 Zigbee transmission interface circuit, U7 in the figure is the Zigbee communication module, its operating power is 3.3V, the power from 5V passes through the 3.3V voltage regulator IC of U6 to get the working voltage of 3.3V, U10 is the capacitive touch IC , KEY1 and KEY2 in the figure are two touch points, which are designed near the upper cover. When the human finger approaches KEY1 or KEY2, U10 will convert the change of its capacitance into a digital output signal, that is, BUTTON1 and BUTTON2 in the figure. Corresponding to the touch points KEY1 and KEY2, in other words, when the finger is close to the nameplate, BUTTON1 and BUTTON2 can generate HI and LOW potentials. Touching KEY2 can also cause the D9 indicator LED to blink to indicate the signal strength. For example, if it blinks once, it means the signal is weak, and if it blinks five times, it means the signal is strong. D8 blinks once every time a connection is made, which means the communication is OK. The data transmission is through the RXD and TXD interfaces, and the two-way communication with the 5.8U11 microprocessor of the block. In other words, the main task of this block is to be responsible for the external connection, and to achieve the purpose of automatic networking through the Zigbee communication protocol. CON 1 in the figure is a reserved socket for burning the Zigbee module program, through which the application program of the Zigbee module can be modified or updated. the

In addition to the description of the above embodiments, regarding the specific application of the present invention, the main components of the measurement transmission body 1.3 and the multiplex current detection input device 1.5 are not limited to be installed in the power switch box at the same time. When the utility model is actually used, it can be flexibly changed according to the needs. For example, the length of the current measurement line 1.4 shown in the figure should not be limited to a specific length. 1.3 are individually led to any outside of the power switch box, and the other end of the measurement transmission body 1.3 only needs to be plugged and connected to the general mains, which also belongs to the specific application category of the present invention. the

The disclosure of the above-mentioned embodiments is only an illustration of the main technology of the present utility model, but it is not used to limit the technical scope of the present utility model. Any simple change or replacement involving equivalent applications or based on the preceding technical means shall be considered as an example. It should be regarded as belonging to the scope of protection of the utility model, such as using time-division multiplexing to measure other quantities of current, or measuring three groups of circuits as three-phase power information, etc. the

Claims (9)

1. one kind has many groups power measurement transmitting device full-time and that multiplex's timesharing is measured, it is characterized in that, comprising one built-inly has small-sized measurement transmission body and multiplex's electric current of radio transmitting device to detect input media, this multiplex's electric current detects input media and connects general supply and each branch supply, this measurement transmission body is linked to multiplex's electric current and detects input media, the power consumption that each branch supply is measured in full-time measurement general supply and multiplex's timesharing, and, measured every power information is sent to the outer monitoring system with wireless transmission method via measuring the built-in radio transmitting device of transmission body.

2. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, and it is characterized in that it is the Zigbee wireless transport module that the built-in radio transmitting device of body is transmitted in this measurements.

3. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, and it is characterized in that, this measurements is transmitted body and multiplex's electric current and detected input media and insert in source box simultaneously.

4. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, and it is characterized in that, this measurements transmission body utilizes the prolongation of magnitude of current survey line to link and will measure and transmit body and be seated in outside the switch box.

5. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, and it is characterized in that this measurements transmission body is connected with one group of general supply incoming line, is provided with the power lead cover outside the described general supply incoming line; Described measurement transmission body also detects input media via a magnitude of current survey line and an electric current of being made up of a plurality of removable jew current transformers and forms and be connected, wherein two current transformers of big electric current are enclosed within the input end of general supply, the current transformer of all the other less electric currents then be enclosed within other each along separate routes on, each current transformer detects Signal plug and is inserted in current transformer and detects signal plug.

6. as claimed in claim 5 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, it is characterized in that, described other electric currents along separate routes detect the timesharing commutation circuit of input media inside via electric current, carry out each branch current multiplex (MUX) in turn and measure.

7. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, it is characterized in that, this measurement transmission body comprises loam cake inscription plate, one operation touch-control inscription plate, one loam cake, one Zigbee wireless transport module, an one power measurement substrate and an isolated from power PT, lower cover and loam cake are sealed, and the two ends line cover of combining closely, thereby with wireless transport module, the power measurement substrate, the isolated from power PT is inserted in loam cake and the lower cover and is set firmly and combines, loam cake is engraved plate and operation touch-control inscription plate lock and be incorporated into loam cake, and each coupling of housing two ends is in conjunction with a line cover.

8. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, it is characterized in that, this multiplex's electric current detects input media and comprises an outer shell base, one switches circuit board, integrated circuit and a connector that one multiplex (MUX) is switched, outer shell base is formed by detect input media mould injection body with multiplex's electric current, the commutation circuit plate is an electric current timesharing commutation circuit plate, its upper end is in conjunction with being provided with the socket that a plurality of current transformers detect signal, an integrated circuit that provides the multiplex (MUX) to switch is provided the integrated circuit that the multiplex (MUX) is switched, be located on the commutation circuit plate, connector is the connector of electric current timesharing switch boards, and coupling is incorporated on the commutation circuit plate, utilize mould to annotate mode with socket, the commutation circuit plate, integrated circuit that the multiplex (MUX) is switched and connector with mould encapsulating total incapsulation together, the connector other end then connects electric wire and line cover.

9. as claimed in claim 1 have many groups power measurement transmitting device that full-time and multiplex's timesharing is measured, it is characterized in that, it is formed framework and comprises power supply supply and buffer circuit, full-time power measurement circuit, timesharing power measurement circuit, voltage detecting isolation processing circuit, organizes that electric current detects and buffer circuit, time division multiplexing treatment circuit, Zigbee transmission interface circuit and microcontroller circuit and peripheral control circuit more, wherein:

Power supply supply and buffer circuit connect general supply, are used for utilizing the switching type power supply supply circuit from general supply voltage to be measured, to obtain required various low-voltage dc power supplies;

Voltage detecting isolation processing circuit connects general supply, is used for line voltage to be measured is obtained the required voltage signal amplitude of power measurement circuit with fixing ratio, and makes voltage signal and the complete electrical isolation of civil power to be measured;

Many group electric currents detect and buffer circuit, connect general supply and each branch supply, are used to detect the electric current of total current and each branch supply; Described many group electric currents detect and the detection signal of buffer circuit is obtained by the current transformer of removable jew, the current transformer opening of removable jew is opened and is allowed electric wire to be measured pass the iron core hole of current transformer, and then closing any opening, every group of current transformer all provide one group of ratio in the voltage signal of detecting electric wire current signal to the time division multiplexing treatment circuit;

Full-time power measurement circuit, connect described voltage detecting isolation processing circuit and organize electric current more and detect and buffer circuit, be used to receive general supply voltage signal, reach general supply current signal from many groups current detecting and buffer circuit from voltage detecting isolation processing circuit; With both signals after full-time power measurement, with power measurement and the electric energy accumulation results is delivered to microprocessor and peripheral control circuit removes to be processed into the general supply power information that desire is sent backward;

The time division multiplexing treatment circuit, connecting described many group electric currents detects and buffer circuit, being used for timesharing switches in turn from many groups electric current and detects and the current signal of buffer circuit, convert this current signal to voltage signal, and give timesharing power measurement circuit by the voltage signal that each group current transformer of switching is sensed;

Timesharing power measurement circuit, connect described voltage detecting isolation processing circuit and time division multiplexing treatment circuit, be used for receiving, from the total voltage signal of voltage detecting isolation processing circuit with from each branch current signal of time division multiplexing treatment circuit, the mode of taking turns with timesharing is measured and is accumulated each power information along separate routes, this time division multiplexing treatment circuit is with fixing, correct time is switched each current signal along separate routes in timesharing, timesharing power measurement circuit then cooperates power measurement and accumulation electric energy synchronously, and each result along separate routes delivered to microprocessor and peripheral control circuit goes each power measurement information along separate routes of time-division processing, and calculate via the ratio of program, with each real power information along separate routes of reduction;

Microprocessor and peripheral control circuit, connect described full-time power measurement circuit, timesharing power measurement circuit and time division multiplexing treatment circuit, be used to handle and calculate full-time and the data timesharing power measurement, convert real general supply and each branch supply electric power and consumption information to, and via Zigbee transmission interface circuit, use wireless communication mode, with measured power information and outer monitoring system line;

Zigbee transmission interface circuit, connect described microprocessor and peripheral control circuit, the power information that is used for measuring is sent to the outside and has the supervisory system of Zigbee transmission interface equally via built-in Zigbee wireless transport module, and forms the networking automatically with the outer monitoring system.

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