CN205450251U - Digital electric energy meter verifying device - Google Patents

Abstract

The utility model discloses a digital electric energy meter verifying device, including interface module, power module and host system, interface module externally provides the standard connection port and the electric energy meter is connected, power module is connected with host system and the power supply, host system and interface module are connected, send standard output signal and give the electric energy meter to follow electric energy meter received signal, be used for detecting the performance of electric energy meter, including the shell wraps up interface module, power module and host system, in order to provide the protection. The utility model discloses to the detection requirement design of electric energy meter hardware circuit, require to detect to the detection of electric energy meter, testing goal nature is strong, it is convenient quick to detect, adoption host system automatic control detects process automation, no humanization, accuracyization, simultaneously to the measuring of electric energy meter the utility model discloses the circuit is simple reliable, and the cost is lower.

Description

Digital electric energy meter checking device

Technical field

This utility model is specifically related to a kind of digital electric energy meter checking device.

Background technology

Along with development and the raising of people's living standard of national economy technology, electric energy has had become as people and has produced and one of indispensable secondary energy sources in life.Electric energy meter as metering electric energy measuring instrument, its metering accuracy, either to power system or to user, all it is critical that.

At present, although have the calibration instrument of electric energy meter, but existing calibration instrument generally uses complex, use inconvenience, and calibration instrument circuit is complicated, relatively costly, be unfavorable for the use of calibration personnel.Being additionally, since existing calibration instrument volume relatively big, the most not readily portable, for the calibration of the electric energy meter of Special geographical position, it often cannot use, and brings can inevitably bother to the calibration of electric energy meter.

Utility model content

The purpose of this utility model is to provide a kind of digital electric energy meter checking device that be applicable to laboratory and field work, that cost is relatively low, easy to use.

This digital electric energy meter checking device that this utility model provides, including interface module, power module and main control module, interface module externally provides standardized connection port and electric energy meter to connect；Power module is connected with main control module and powers；Main control module is connected with interface module, and transmission standard output signals is to electric energy meter, and receives signal from electric energy meter, for detecting the performance of electric energy meter；In interface module, power module and main control module are wrapped in by shell, to provide protection.

Described digital electric energy meter checking device, also includes LCD MODULE；LCD MODULE is connected with main control module, for the state of display digit electric energy meter checking device with carry out parameter setting.

Described interface module includes that optical signal receiving port circuit, optical signal send mouth circuit, calibration pulse output circuit and tested pulse input port circuit.

Described power module includes ac/dc modular converter, 3.3V power-switching circuit and 12V power-switching circuit.

Described main control module is industrial computer.

Described main control module is DPS and FPGA；When signal receives, the optical signal of electric energy meter output is converted into the signal of telecommunication, and DSP delivers to FPGA after being decoded by the signal of telecommunication and is calculated and be shown；When signal sends, FPGA generates after reference waveform Data Conversion Protocol is converted to optical signal by standard detection Wave data feeding DSP, DSP and exports to electric energy meter.

This utility model is for the detection Demand Design hardware circuit of electric energy meter, it is possible to the testing requirement for electric energy meter detects targetedly, testing goal is strong, easy to detect quickly；This utility model uses main control module to automatically control the detection to electric energy meter, detects process automation, unmanned, accuracy；This utility model circuit is simple and reliable simultaneously, and cost is relatively low.

Accompanying drawing explanation

Fig. 1 is functional block diagram of the present utility model.

Fig. 2 is interface module circuit schematic diagram of the present utility model.

Fig. 3 is power module 12V power-switching circuit schematic diagram of the present utility model.

Fig. 4 is power module 3.3V power-switching circuit schematic diagram of the present utility model.

Fig. 5 is LCD MODULE circuit theory diagrams of the present utility model.

Fig. 6 is main control module circuit diagram of the present utility model.

Fig. 7 is shell mechanism schematic diagram of the present utility model.

Detailed description of the invention

It is illustrated in figure 1 functional block diagram of the present utility model: this digital electric energy meter checking device that this utility model provides, including main control module, LCD MODULE, power module and interface module；Power module is connected with LCD MODULE, main control module and powers；LCD MODULE is connected with main control module, for the operational factor of display digit electric energy meter checking device, it is also possible to for digital electric energy meter checking device is carried out parameter setting；Main control module is connected with interface module, for detected electric energy meter outputting standard is detected signal, is also used for the signal receiving the output of detected electric energy meter to differentiate the performance of electric energy meter.

Described power module includes ac-dc converter circuit, 3.3V power-switching circuit and 12V power-switching circuit；Described interface module includes that optical signal receiving port circuit, optical signal send mouth circuit, calibration pulse output circuit and tested pulse input port circuit；Described main control module can use industrial control computer, the control chip of " DPS+FPGA " can also be used: use DPS+FPGA control chip, when signal receives, the optical signal of electric energy meter output is converted into the signal of telecommunication, and DSP delivers to FPGA after being decoded by the signal of telecommunication and is calculated and be shown；When signal sends, FPGA generates after reference waveform Data Conversion Protocol is converted to optical signal by standard detection Wave data feeding DSP, DSP and exports to electric energy meter.

It is illustrated in figure 2 interface module circuit schematic diagram of the present utility model: the interface that this utility model provides includes that P1, P3 and the P4 shown in figure, three interfaces use standard interface form to be connected with tested electric energy meter；Three road signals (indicating ISO_REACT_PLUSE_IN, ISO_ACT_PLUSE_IN and ISO_ACT_PLUSE_OUT in the figure) interface that three road interfaces provide exports three road signals (indicating REACT_PLUSE_IN_1, ACT_PLUSE_2 and ACT_PLUSE_OUT in figure) after carrying out signal isolation by isolating chip；Two paths of signals REACT_PLUSE_IN_1 and ACT_PLUSE_2 therein again by phase inverter reversely after be input to controller again.

Being illustrated in figure 3 12V power-switching circuit schematic diagram: the P8 in figure is interface, it is connected with the outfan of ac/dc modular converter；Ac/dc modular converter uses AC220V to turn the ac/dc modular converter of DC12V, 12V outfan is by being input to 1 foot of linear voltage regulator (indicating U8 in figure) after two filter capacitors (indicating C29 and C30 in figure), 2 feet of linear voltage regulator are connected to ground, 3 feet are outfan, stable 12V supply voltage is exported after the 12V voltage of input is carried out voltage stabilizing, then by two filter capacitors (indicating C31 and C33 in figure) supplying power for outside afterwards.

It is illustrated in figure 4 power module 3.3V power-switching circuit schematic diagram of the present utility model: 5V power supply input signal (indicating CM_nPWD in figure) turns 2 feet of 3.3V power supply chip (indicating U1 in figure) by two current-limiting resistances (indicating R8 and R9 in figure) or output to 5V; by 2 feet of chip by multiple filter capacitors (in figure indicate C14, C15 and C16) ground connection, by a Zener diode ground connection as protection, simultaneously also by a display lamp (indicating LED1 in figure) ground connection as the instruction of working power；1 foot of chip and 8 feet are connected by electric capacity (indicating C13 in figure), and 4 feet of chip are directly by filter capacitor (indicating C18 in figure) ground connection；8 feet of chip are output pin, and 7 feet are that grounding pin is directly grounded；8 feet of chip are by two filter inductances (indicating L4 and L5 in figure) output+3.3V power supply, and+3.3V the power supply of output is also by three filter capacitors (indicating C10, C11 and C12 in figure) ground connection；Ground connection after 3 voltage sample resistance (indicating R11, R12 and R13 in the figure) concatenation of outfan, the signal of voltage sample is connected between resistance R12 and R13, and voltage sampling signal is connected to 5 feet developed a film；Connect between 6 feet and 7 feet of chip and have the RC circuit of parallel connection (indicating R10 and C19 in figure) and filter capacitor (indicating C17 in figure).

It is illustrated in figure 5 LCD MODULE circuit theory diagrams of the present utility model: the P1 in figure is binding post, the 1 of terminal, 3,5,7,9 and 11 feet are connected with controller, the 13 of terminal, 15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45 and 47 feet are the most directly connected to ground, 38 feet connect signal FPGA-INT, 40 feet connect signal PG7,42 feet connect signal PG3,44 feet connect signal PG4,46 feet connect signal PG2,48 foot feet connect signal PF15,34 feet and 36 feet are all connected with 3.3V power supply, 32 foot ground connection；The 6 of terminal, 8,10,12,14,16,18,20,22,24,26,28 and 30 feet output signals to LCD MODULE by respective current-limiting resistance respectively, and the signal simultaneously exported is also by respective filter capacitor ground connection；2 feet of terminal connect ground, and 4 feet connect the power supply signal of LCD_VDD.

It is illustrated in figure 6 main control module circuit diagram of the present utility model: the left side chip in figure is PHY chip (physical interface transponder chip), and centre is controller module, uses the circuit mode of DSP+FPGA；Upper right side chip in figure is power supply chip (indicating Power in figure), and lower right is the memory chip (indicating Flash in figure) of extension；Controller module has 8 road signals and is connected with power supply chip, respectively power supply signal VROUT, reset signal nRST, the first clock signal RsCLK0, RFX0 signal, DR0PRI signal, second clock signal TSCLK0, IFX0 signal and DI0PRI signal；Being connected by winding displacement (indicating PF [0 ... 15] in figure) between controller module and extended menory Flash, control module connects again by winding displacement (indicating PG [0 ... 15] in figure) with PHY chip；In addition, control module is connected also by 18 tunnel signal pins with PHY chip, signal E_TX_EN and receiving terminal clock E_TX_CLK is enabled with receiving terminal including control signal E_MDC, E_MDIO signal, receiving terminal data signal E_TXD0, E_TXD1, E_TXD2, E_TXD3, E_DN signal, E_COL signal and receiving terminal data signal E_RXD0, E_RXD1, E_RXD2 and E_RXD3, E_RX_DV signal, receiving terminal clock signal E_DX_CLK signal, receiving terminal enable signal E_RX_ER signal and E_CRX signal；Additionally, PHY chip is also connected by two paths of signals (indicating E_LED0 and E_LED1 in figure) with power supply chip.

It is illustrated in figure 7 shell mechanism schematic diagram of the present utility model: in figure, label is respectively as follows: 1-panel；2-digital interface unit；3-connects post；4-support；5-central control unit；Box on 6-safety box；7-sealing ring；Box under 8-safety box；9-screw；This shell mechanism of this practical information includes box and panel under box on safety box, safety box, and panel offers the display window of liquid crystal display and notch matching used with interface module；Panel positions by connecting box under post and safety box and connects, and fixes with box under safety box also by screw simultaneously；On safety box, under box and safety box, box is linked together by hinges, is provided with sealing ring on safety box under box and safety box between box simultaneously；Under described safety box, box is additionally provided with the handle that can be mentioned by whole digital electric energy meter checking device, in order to carrying of digital electric energy meter checking device；Being provided with a coil support under safety box on box, described support is used for fixed panel.

Claims (6)

1. a digital electric energy meter checking device, it is characterised in that include interface module, power module and main control module, interface module externally provides standardized connection port and electric energy meter to connect；Power module is connected with main control module and powers；Main control module is connected with interface module, and transmission standard output signals is to electric energy meter, and receives signal from electric energy meter, for detecting the performance of electric energy meter；In interface module, power module and main control module are wrapped in by shell, to provide protection.

Digital electric energy meter checking device the most according to claim 1, it is characterised in that also include LCD MODULE；LCD MODULE is connected with main control module, for the state of display digit electric energy meter checking device with carry out parameter setting.

Digital electric energy meter checking device the most according to claim 1 and 2, it is characterised in that described interface module includes that optical signal receiving port circuit, optical signal send mouth circuit, calibration pulse output circuit and tested pulse input port circuit.

Digital electric energy meter checking device the most according to claim 1 and 2, it is characterised in that described power module includes ac/dc modular converter, 3.3V power-switching circuit and 12V power-switching circuit.

Digital electric energy meter checking device the most according to claim 1 and 2, it is characterised in that described main control module is industrial computer.

Digital electric energy meter checking device the most according to claim 1 and 2, it is characterised in that described main control module is DPS and FPGA；When signal receives, the optical signal of electric energy meter output is converted into the signal of telecommunication, and DSP delivers to FPGA after being decoded by the signal of telecommunication and is calculated and be shown；When signal sends, FPGA generates after reference waveform Data Conversion Protocol is converted to optical signal by standard detection Wave data feeding DSP, DSP and exports to electric energy meter.