CN213069024U - Multifunctional instrument of digital display power network - Google Patents
Multifunctional instrument of digital display power network Download PDFInfo
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- CN213069024U CN213069024U CN202021116729.2U CN202021116729U CN213069024U CN 213069024 U CN213069024 U CN 213069024U CN 202021116729 U CN202021116729 U CN 202021116729U CN 213069024 U CN213069024 U CN 213069024U
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Abstract
The utility model relates to a multi-functional instrument of digital display power network, a serial communication port, include: the method comprises the following steps: the electric energy pulse module, the communication module, the switching value module and the transmitting module are electrically connected. Through setting up electric energy pulse module, communication module, switching value module, transformer module, implementation mode is simple and easy, and the function is various, can measure the electric power parameter commonly used with high accuracy, like three-phase voltage, three-phase current, active power, reactive power, frequency, power factor, four-quadrant electric energy etc.: the instrument panel is provided with four programming keys, so that a user can conveniently realize display switching and instrument parameter programming setting on site, and the instrument panel has strong flexibility; the method can be widely applied to power monitoring of power systems, industrial and mining enterprises, public facilities, intelligent buildings and the like.
Description
Technical Field
The utility model relates to an instrument and meter technical field, more specifically say, relate to a multi-functional instrument of digital display power network.
Background
With the development of electronic technology, people have higher and higher demands on multifunctional network power meters used in power systems, industrial and mining enterprises, public facilities, intelligent building power monitoring and the like. In the prior art, in the functions of the multifunctional network power instrument, the field convenient display and switching of a user is inflexible, the programming setting of instrument parameters is complex, and the flexibility is poor. Thus, significant advances in the art are needed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the foretell defect of prior art, provide a multi-functional instrument of digital display power network, include: the electric energy pulse module, the communication module, the switching value module and the transmitting module are electrically connected.
Among the digital display power network multifunctional instrument, the electric energy pulse module includes: one end of the resistor R49 is connected with one end of the capacitor C32 and the anode of the photoelectric coupler P521, the other end of the capacitor C32 is grounded, the cathode of the photoelectric coupler P521 is connected with the anode of the photosensitive diode D2, and the cathode of the photosensitive diode D2 is grounded;
one end of the resistor R48 is connected with one end of the capacitor C31 and the anode of the photoelectric coupler P521, the other end of the capacitor C32 is grounded, the cathode of the photoelectric coupler P521 is connected with the anode of the photosensitive diode D1, and the cathode of the photosensitive diode D1 is grounded.
Among the digital display power network multifunctional instrument, communication module includes:
a pin 6 of the optocoupler U2 is RXD, and a resistor R32 is connected in series between the pin 6 of the optocoupler U2 and a pin 8 of the optocoupler U2; pin 5 of optocoupler U2 is grounded; a resistor R34 is connected in series between the pin 2 of the optocoupler U1 and the pin 8 of the optocoupler U2; pin 3 of optocoupler U1 is TXD; a resistor R33 is connected in series between the pin 8 of the optocoupler U1 and the pin 2 of the optocoupler U2; pin 3 of the optical coupler U2 is connected with pin 1 of the serial port communication chip U3; a resistor R33 is connected in series between the pin 2 of the optocoupler U2 and the pin 8 of the serial communication chip U3; a resistor R31 is connected in series between a pin 6 of the optocoupler U1 and a pin 8 of the serial communication chip U3; the pin 6 of the optocoupler U1 is also connected with one end of a resistor R52, and the other end of the resistor R52 is connected with the base electrode of a triode Q1; an emitter of the triode Q1 is respectively connected with a pin 5 of the optical coupler U1, a pin 5 of the serial port communication chip U3, one end of the resistor R54 and one end of the capacitor C20; a collector of the triode Q1 is respectively connected with a pin 2 of the serial port communication chip U3, a pin 3 of the serial port communication chip U3 and one end of a resistor R53; the other end of the resistor R53 is respectively connected with a pin 8 of the optical coupler U1, a pin 8 of the serial port communication chip U3 and one end of a resistor R55; a pin 7 of the serial port communication chip U3 is connected with one end of a resistor R46, and the other end of the resistor R46 is connected with the other end of a resistor R54; pin 6 of serial port communication chip U3 is connected with one end of resistor R45; the other end of the resistor R45 is connected with the other end of the resistor R55; the other end of the capacitor C20 is connected to one end of a resistor R55.
Among the digital display power network multifunctional instrument, the switching value module includes:
one end of the resistor R38 outputs 5V, the other end of the resistor R38 is connected with the anode of the optocoupler U6, and the emitter of the optocoupler U6 is connected with one end of the resistor R42 and the base of the triode Q1 respectively; the other end of the resistor R42 is connected with an emitting electrode of the triode Q1; the collector of the optocoupler U6 is connected with the resistor R5; the collector of the triode Q1 is connected with the anode of the diode D6;
one end of the resistor R39 outputs 5V, the other end of the resistor R39 is connected with the anode of the optocoupler U7, and the emitter of the optocoupler U7 is connected with one end of the resistor R43 and the base of the triode Q2 respectively; the other end of the resistor R43 is connected with an emitting electrode of the triode Q2; the collector of the optocoupler U7 is connected with the resistor R6; the collector of the triode Q2 is connected with the anode of the diode D7;
one end of the resistor R40 outputs 5V, the other end of the resistor R40 is connected with the anode of the optocoupler U8, and the emitter of the optocoupler U8 is connected with one end of the resistor R44 and the base of the triode Q4 respectively; the other end of the resistor R44 is connected with an emitting electrode of the triode Q4; the collector of the optocoupler U8 is connected with the resistor R7; the collector of the triode Q2 is connected with the anode of the diode D12;
one end of the resistor R41 outputs 5V, the other end of the resistor R41 is connected with the anode of the optocoupler U9, and the emitter of the optocoupler U9 is connected with one end of the resistor R45 and the base of the triode Q5 respectively; the other end of the resistor R45 is connected with an emitting electrode of the triode Q5; the collector of the optocoupler U9 is connected with the resistor R8; the collector of the transistor Q5 is connected to the anode of the diode D13.
Among the digital display power network multifunctional instrument, the transmitting module includes: and multiple paths of analog quantity transmitting output, wherein each path of analog quantity transmitting output can select multiple electric quantity parameters to set, and the analog transmitting output of the electric quantity is achieved through an analog quantity transmitting module of the multifunctional instrument.
Implement the utility model discloses a digital display power network multifunctional instrument has following beneficial effect: through setting up electric energy pulse module, communication module, switching value module, transformer module, implementation mode is simple and easy, and the function is various, can measure the electric power parameter commonly used with high accuracy, like three-phase voltage, three-phase current, active power, reactive power, frequency, power factor, four-quadrant electric energy etc.: the instrument panel is provided with four programming keys, so that a user can conveniently realize display switching and instrument parameter programming setting on site, and the instrument panel has strong flexibility; the method can be widely applied to power monitoring of power systems, industrial and mining enterprises, public facilities, intelligent buildings and the like.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is the structure schematic diagram of the digital display power network multifunctional instrument of the utility model.
Fig. 2 shows an electric energy pulse module (a) in the digital display electric power network multifunctional instrument.
Fig. 3 is the electric energy pulse module (b) in the digital display electric power network multifunctional instrument of the utility model.
Fig. 4 is a switching value module (a) in the digital display power network multifunctional instrument of the utility model.
Fig. 5 shows the switching value module (b) in the digital display power network multifunctional instrument.
Fig. 6 shows the switching value module (c) in the digital display power network multifunctional instrument.
Fig. 7 shows the switching value module (d) in the digital display power network multifunctional instrument.
Fig. 8 is a switching value module (e) in the digital display power network multifunctional instrument of the utility model.
Fig. 9 shows the switching value module (f) in the digital display power network multifunctional instrument of the present invention.
Fig. 10 shows the switching value module (g) in the digital display power network multifunctional instrument of the present invention.
Fig. 11 shows the switching value module (h) in the digital display power network multifunctional instrument of the present invention.
Fig. 12 is the utility model discloses communication module in the multi-functional instrument of digital display power network.
Fig. 13 is a transmission module in the digital display power network multifunctional instrument of the utility model.
Detailed Description
Please refer to fig. 1, which is a schematic diagram of the structure of the digital display power network multifunctional instrument of the present invention. As shown in fig. 1, the utility model discloses in the digital display power network multifunctional instrument that the first embodiment provided, include electric energy pulse module, communication module, switching value module, the transmission module through the electricity connection at least. The electric energy pulse module and the communication module are adopted, so that the functions of the multifunctional meter can be realized. The electric energy pulse module, the communication module, the switching value module and the transmitting module are adopted, so that the function of the network meter can be realized. The power pulse module can include two way power pulse outputs, and the communication template can include RS485 communication and Modbus RTU communication. The switching value module can adopt 4-way open-in and 2-way open-out to be optional; the transmitter module may implement a 4-20mA or 0-20mA option.
The utility model discloses electric power parameter among the multi-functional instrument measurable quantity electric wire netting of digital display electric power network has: ua, Ub, Uc (phase voltage); uab, Ubc, Uca (line voltage); ia. Ib, Ic (current); pa, Pb, Pc, Ps (active power per phase and total active power); qa, Qb, Qc, Qs (per phase reactive power and total reactive power); PFa, PFb, PFc, PFs (power factor per item and total power factor); sa, Sb, Sc, Ss (apparent power per phase and total apparent power); f (frequency) 26 electric quantities and four-quadrant electric energy, all measured electric quantity parameters are stored in an electric quantity information meter inside the meter, and the data can be accessed and collected through a digital communication interface of the meter.
Please refer to fig. 2, which is an electric energy pulse module (a) in the digital display power network multifunctional instrument of the present invention. As shown in fig. 2, the power pulse module (a) includes: one end of the resistor R49 is connected with one end of the capacitor C32 and the anode of the photoelectric coupler P521, the other end of the capacitor C32 is grounded, the cathode of the photoelectric coupler P521 is connected with the anode of the photosensitive diode D2, and the cathode of the photosensitive diode D2 is grounded.
Please refer to fig. 3, which is an electric energy pulse module (b) in the digital display power network multifunctional instrument of the present invention. As shown in fig. 3, the power pulse module (b) includes: one end of the resistor R48 is connected with one end of the capacitor C31 and the anode of the photoelectric coupler P521, the other end of the capacitor C32 is grounded, the cathode of the photoelectric coupler P521 is connected with the anode of the photosensitive diode D1, and the cathode of the photosensitive diode D1 is grounded.
The switching value module part provides 4-way switching value input function and 4-way switching value output function of the optical coupling relay. The 4-path switch input adopts a dry node resistance switch signal input mode, and a +12V working power supply is arranged in the instrument without external power supply. When the external is connected, the instrument switch input module DI acquires connection information and corresponding road number numbers 1, 2, 3 and 4 to display; when the external is disconnected, the disconnection information is acquired through the instrument switch input module DI, and the corresponding road number is displayed as 0. The switching value input module can not only collect and display local switching information, but also realize a remote transmission function, namely a remote signaling function, through a digital interface RS485 of the instrument; the switching value output function of the 4-path optical coupling relay can be used for alarm indication, protection control and other output functions in various places. When the switch output is effective, the relay output is switched on, and when the switch output is switched off, the relay output is switched off.
Please refer to fig. 4, which is a switching value module (a) of the digital display power network multifunctional instrument of the present invention. As shown in fig. 4, the switching value module (a) includes: one end of the resistor R38 outputs 5V, the other end of the resistor R38 is connected with the anode of the optocoupler U6, and the emitter of the optocoupler U6 is connected with one end of the resistor R42 and the base of the triode Q1 respectively; the other end of the resistor R42 is connected with an emitting electrode of the triode Q1; the collector of the optocoupler U6 is connected with the resistor R5; the collector of the transistor Q1 is connected to the anode of the diode D6.
Please refer to fig. 5, which is a switching value module (b) of the digital display power network multifunctional instrument of the present invention. As shown in fig. 5, the switching value module (b) includes: one end of the resistor R39 outputs 5V, the other end of the resistor R39 is connected with the anode of the optocoupler U7, and the emitter of the optocoupler U7 is connected with one end of the resistor R43 and the base of the triode Q2 respectively; the other end of the resistor R43 is connected with an emitting electrode of the triode Q2; the collector of the optocoupler U7 is connected with the resistor R6; the collector of the transistor Q2 is connected to the anode of the diode D7.
Please refer to fig. 6, which is a switching value module (c) of the digital display power network multifunctional instrument of the present invention. The switching value module (c) includes: one end of the resistor R40 outputs 5V, the other end of the resistor R40 is connected with the anode of the optocoupler U8, and the emitter of the optocoupler U8 is connected with one end of the resistor R44 and the base of the triode Q4 respectively; the other end of the resistor R44 is connected with an emitting electrode of the triode Q4; the collector of the optocoupler U8 is connected with the resistor R7; the collector of the transistor Q2 is connected to the anode of the diode D12.
Please refer to fig. 7, which is a switching value module (d) in the digital display power network multifunctional instrument of the present invention. The switching value module (d) includes: one end of the resistor R41 outputs 5V, the other end of the resistor R41 is connected with the anode of the optocoupler U9, and the emitter of the optocoupler U9 is connected with one end of the resistor R45 and the base of the triode Q5 respectively; the other end of the resistor R45 is connected with an emitting electrode of the triode Q5; the collector of the optocoupler U9 is connected with the resistor R8; the collector of the transistor Q5 is connected to the anode of the diode D13.
Please refer to fig. 8, which is a switching value module (e) in the digital display power network multifunctional instrument of the present invention. The switching value module (e) includes: one end of a direct digital interface DDI1 is arranged at one end of a resistor R59, the other end of the resistor R59 is connected with the anode of a photocoupler opto 1, and the cathode of the photocoupler opto 1 is grounded. An emitter of the photoelectric coupler optiso 1 is connected with one end of a capacitor C45 and grounded, the other end of the capacitor C45 is connected with a collector of the photoelectric coupler optiso 1 and one end of a resistor R68, and VCC is led out of the other end of the resistor R68.
Please refer to fig. 9, which illustrates the switching value module (f) in the digital display power network multifunctional instrument of the present invention. The switching value module (f) includes: one end of a direct digital interface DDI2 is arranged at one end of a resistor R58, the other end of the resistor R58 is connected with the anode of a photocoupler opto 1, and the cathode of the photocoupler opto 1 is grounded. An emitter of the photoelectric coupler optiso 1 is connected with one end of a capacitor C44 and grounded, the other end of the capacitor C44 is connected with a collector of the photoelectric coupler optiso 1 and one end of a resistor R67, and VCC is led out of the other end of the resistor R67.
Please refer to fig. 10, which is a switching value module (g) of the digital display power network multifunctional instrument of the present invention. The switching value module (g) includes: one end of a direct digital interface DDI3 is arranged at one end of a resistor R57, the other end of the resistor R57 is connected with the anode of a photocoupler opto 1, and the cathode of the photocoupler opto 1 is grounded. An emitter of the photoelectric coupler optiso 1 is connected with one end of a capacitor C43 and grounded, the other end of the capacitor C43 is connected with a collector of the photoelectric coupler optiso 1 and one end of a resistor R66, and VCC is led out of the other end of the resistor R66.
Please refer to fig. 11, which illustrates the switching value module (h) in the digital display power network multifunctional instrument of the present invention. The switching value module (h) includes: one end of a direct digital interface DDI4 is arranged at one end of a resistor R56, the other end of the resistor R56 is connected with the anode of a photocoupler opto 1, and the cathode of the photocoupler opto 1 is grounded. An emitter of the photoelectric coupler optiso 1 is connected with one end of a capacitor C42 and grounded, the other end of the capacitor C42 is connected with a collector of the photoelectric coupler optiso 1 and one end of a resistor R65, and VCC is led out of the other end of the resistor R65.
Switching value input function: the network power meter has a 4-path switching value input real-time acquisition function. And switching to a switching value display page by the instrument display page. The lowermost row on the liquid crystal display is the character "K10301204": "K" switching value code: the "10301204" switching value status indicates that the four high bits "1030" are in status, and from left to right represent the switching value inputs of 1 st, 2 nd, 3 rd and 4 th paths, respectively, a "0" represents off, a non-zero number represents on, such as "1030" represents that the 1 st and 3 rd paths are on, and the 2 nd and 4 th paths are off. The lower four bits "1204" are the on state. Information from the switch information register (DI0) can be transmitted to a remote computer terminal via the meter RS485 digital interface.
Switching value output function: remote control is an important function of the switching value output function. The remote control function code is 05, and is defined according to the 05 function code of the standard MODBUS-RTU protocol: 0000-way 1 switching value output logic address; 0001-way 2 switching value output logic address; the method of use is illustrated by the following example: the site has a circuit breaker that controls the switching on and off of the user's load. The switching-on and switching-off state of the circuit breaker is required to be controlled in a remote control mode through the 1 st switching value output on the instrument.
The implementation method comprises the following steps: let the meter communication address be 1. As the remote control function is adopted, the 1 st switching value of the meter is firstly set to be in a remote control mode, namely the 2 nd row value of a D0-1 page in a programming menu is set to be 0. After the setting is finished, the master station issues the following remote control instructions to the instrument:
programming example: for 10 KV/100V; 400A/5A meter settings: d01 alarm when Ua is larger than 11 KV; the Ia at the DOS2 position is greater than 400A for alarming; DOS3 alarms when PF is less than 0.9; DOS4 alarms for F greater than 51.00HZ, with the control words written as:
the switching value setting parameter DOSi can be realized by programming setting of a keyboard. In a programming operation, DOS 1-related parameters can be expressed as: d0-1 shows that the set item is a first switching value output quantity; 0007 is the selected alarm charge item, 7 is a 1a low alarm. 2000 is the alarm interval, when 1a < 2000, D01 outputs the alarm signal, namely: the relay is turned on. Switching value output and transmission output electric quantity parameter comparison table (the following table):
please refer to fig. 12, which is a communication module in the digital display power network multifunctional instrument of the present invention. The communication module includes: pin 6 of the optocoupler U26N 137 is RXD, and a resistor R32 is connected in series between pin 6 of the optocoupler U26N 137 and pin 8 of the optocoupler U26N 137. Pin 5 of optocoupler U26N 137 is connected to ground. A resistor R34 is connected in series between pin 2 of the optocoupler U16N 137 and pin 8 of the optocoupler U26N 137. Pin 3 of optocoupler U16N 137 is TXD. A resistor R33 is connected in series between pin 8 of the optocoupler U16N 137 and pin 2 of the optocoupler U26N 137. Pin 3 of the optocoupler U26N 137 is connected to pin 1 of the serial communication chip U36 LB 184. Resistor R33 is connected in series between pin 2 of optocoupler U26N 137 and pin 8 of serial communication chip U36 LB 184. Resistor R31 is connected in series between pin 6 of optocoupler U16N 137 and pin 8 of serial communication chip U36 LB 184. The pin 6 of the optocoupler U16N 137 is also connected with one end of a resistor R52, and the other end of the resistor R52 is connected with the base of a transistor Q1. An emitter of the transistor Q1 is connected to the pin 5 of the optocoupler U16N 137, the pin 5 of the serial communication chip U36 LB184, one end of the resistor R54, and one end of the capacitor C20, respectively. The collector of the transistor Q1 is connected to pin 2 of the serial communication chip U36 LB184, pin 3 of the serial communication chip U36 LB184, and one end of the resistor R53, respectively. The other end of the resistor R53 is connected to the pin 8 of the optocoupler U16N 137, the pin 8 of the serial communication chip U36 LB184, and one end of the resistor R55, respectively. Pin 7 of the serial communication chip U36 LB184 is connected to one end of a resistor R46, and the other end of the resistor R46 is connected to the other end of the resistor R54. Pin 6 of serial communication chip U36 LB184 is connected to one end of resistor R45. The other end of the resistor R45 is connected to the other end of the resistor R55. The other end of the capacitor C20 is connected to one end of a resistor R55.
The utility model discloses digital display power network multifunctional instrument provides serial asynchronous half worker RS458 communication interface, adopts MOD-BUS-RTU agreement, and various data notes all can convey on the communication line. The network power meters can be connected to one line simultaneously, each network power meter can be set with a communication address, communication terminal numbers of different series of meters are different, a shielding twisted pair with a copper mesh is used for communication connection, and the wire diameter is not less than 0.5 mm'. Parallel lines are not required because they are susceptible to interference. When wiring, the communication line is far away from a strong electric cable or other strong electric field environments, and a connection mode of a network is recommended. Star or other connection means are not suggested.
MODBUS/RTU communication protocol: the MODBUS protocol adopts a communication connection mode of a master-slave response mode on one communication line. The master computer signals are addressed to a uniquely addressed terminal (slave) and the terminal sends a response signal in the opposite direction to the master, i.e. the signal transmits all communication data streams in the opposite two directions over a single communication line (half-duplex mode of operation).
The MODBUS protocol only allows communication between the host (PC, PLC, etc.) and the end devices, but not data exchange between the individual end devices, so that the end devices do not occupy the communication line when they initialize, but only respond to inquiry signals arriving locally.
Host inquiry: the inquiry message frame comprises a device address code, a function code, a data information code and a check code. The address code indicates the slave device to be selected: function codes tell the selected slave device what function to perform, e.g., function code 03 or 04 is a request for the slave device to read registers and return their contents; the data segment contains other additional information of the function to be executed by the slave device, such as in a read command, the additional information of the data segment has the number of registers from which to start reading: the check code is used to verify-the correctness of the frame information-a method is provided for the slave device to verify that the message content is correct, which uses the calibration rules of CRC 16. The slave responds: if the slave device generates a normal response, the response message includes the slave address code, the function code, the data information code, and the CRC16 check code. The data information code includes data collected from the device: such as register values or states. If an error occurs, we agree that the slave will not respond.
The transmission mode refers to a series of independent data structures in a data frame and a limited rule for transmitting data, and the transmission mode compatible with the MODBUS protocol-RTU mode is defined below. Bits of each byte: 1 start bit, 8 data bits, 2 stop bits (no parity bits).
Please refer to fig. 13, which is a transmission module in the digital display power network multifunctional instrument of the present invention. The transmitting module comprises: and multiple paths of analog quantity transmitting output, wherein each path of analog quantity transmitting output can select multiple electric quantity parameters to set, and the analog transmitting output of the electric quantity is achieved through an analog quantity transmitting module of the multifunctional instrument. One end of the resistor R300 is connected to the pin 2 of the optocoupler U301, the pin 3 of the optocoupler U301 is grounded, the pin 4 of the optocoupler U301 is connected to one end of the resistor R301, one end of the resistor R302, and one end of the resistor R303, respectively, and the other end of the resistor R302 is connected to one end of the capacitor C301 and one end of the capacitor C302, respectively, and is grounded. The other end of the resistor R303 is connected to the other end of the capacitor C301 and one end of the resistor R304, respectively. The other end of the resistor R304 is connected to the other end of the capacitor C302 and one end of the resistor R305, respectively. The other end of the resistor R305 is connected to pin 3 of the operational amplifier U301. Pin 2 of the operational amplifier U301 is connected to pin 7 of the operational amplifier U302, one end of the capacitor C304, and one end of the resistor R311. The other end of the resistor R311 is connected to the other end of the capacitor C304, one end of the resistor R310, and the pin 6 of the operational amplifier U302. The other end of the resistor R310 is connected to pin 1 of the com port J301 and one end of the resistor R309, respectively. Pin 2 of com port J301 is grounded. The other end of the resistor R309 is connected to one end of the resistor R307 and the pin 2 of the transistor Q301. The other end of the resistor R307 is connected to the pin 5 of the operational amplifier U302 and one end of the resistor R308, respectively, and the other end of the resistor R308 is grounded. Pin 4 of the operational amplifier U301 is connected to ground. The pin 8 of the operational amplifier U301 is connected to one end of the capacitor C303, and the other end of the capacitor C303 is grounded. Pin 1 of the operational amplifier U301 is connected to one end of a resistor R306, and the other end of the resistor R306 is connected to pin 1 of the transistor Q301. The device can measure all common electric parameters with high precision, such as three-phase voltage, three-phase current, active power, reactive power, frequency, power factor, four-quadrant electric energy and the like; the instrument panel is provided with four programming keys, so that a user can conveniently realize display switching and instrument parameter programming setting on site, and the instrument panel has strong flexibility.
The instrument has a plurality of expansion function modules for selection: the RS485 digital interface can realize the instrument networking communication function; the transmission output function of electric energy and electric quantity can be realized by 2 paths of electric energy pulse output and 3(2) paths of analog quantity (0^20 mA/420 mA) output functions; the 4-path switching value input function and the 2-path switching value output function can realize local or remote switching signal monitoring and control output functions (remote signaling and remote control functions), and can realize multiple electric quantity parameter alarming and automatic control functions in a combined manner.
The utility model discloses a design of above embodiment, its beneficial effect is: through setting up electric energy pulse module, communication module, switching value module, transformer module, implementation mode is simple and easy, and the function is various, can measure the electric power parameter commonly used with high accuracy, like three-phase voltage, three-phase current, active power, reactive power, frequency, power factor, four-quadrant electric energy etc.: the instrument panel is provided with four programming keys, so that a user can conveniently realize display switching and instrument parameter programming setting on site, and the instrument panel has strong flexibility; the method can be widely applied to power monitoring of power systems, industrial and mining enterprises, public facilities, intelligent buildings and the like.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. Furthermore, to adapt to the particular situation of the technology of the present invention, it is possible to make numerous modifications to the present invention without departing from its scope of protection. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (4)
1. A digital display power network multifunctional instrument, comprising: the electric energy pulse module, the communication module, the switching value module and the transmitting module are electrically connected; the electrical energy pulse module comprises: one end of the resistor R49 is connected with one end of the capacitor C32 and the anode of the photoelectric coupler P521, the other end of the capacitor C32 is grounded, the cathode of the photoelectric coupler P521 is connected with the anode of the photosensitive diode D2, and the cathode of the photosensitive diode D2 is grounded;
one end of the resistor R48 is connected with one end of the capacitor C31 and the anode of the photoelectric coupler P521, the other end of the capacitor C32 is grounded, the cathode of the photoelectric coupler P521 is connected with the anode of the photosensitive diode D1, and the cathode of the photosensitive diode D1 is grounded.
2. The digital display electric power network multifunctional instrument according to claim 1, wherein the communication module comprises:
a pin 6 of the optocoupler U2 is RXD, and a resistor R32 is connected in series between the pin 6 of the optocoupler U2 and a pin 8 of the optocoupler U2; pin 5 of optocoupler U2 is grounded; a resistor R34 is connected in series between the pin 2 of the optocoupler U1 and the pin 8 of the optocoupler U2; pin 3 of optocoupler U1 is TXD; a resistor R33 is connected in series between the pin 8 of the optocoupler U1 and the pin 2 of the optocoupler U2; pin 3 of the optical coupler U2 is connected with pin 1 of the serial port communication chip U3; a resistor R33 is connected in series between the pin 2 of the optocoupler U2 and the pin 8 of the serial communication chip U3; a resistor R31 is connected in series between a pin 6 of the optocoupler U1 and a pin 8 of the serial communication chip U3; the pin 6 of the optocoupler U1 is also connected with one end of a resistor R52, and the other end of the resistor R52 is connected with the base electrode of a triode Q1; an emitter of the triode Q1 is respectively connected with a pin 5 of the optical coupler U1, a pin 5 of the serial port communication chip U3, one end of the resistor R54 and one end of the capacitor C20; a collector of the triode Q1 is respectively connected with a pin 2 of the serial port communication chip U3, a pin 3 of the serial port communication chip U3 and one end of a resistor R53; the other end of the resistor R53 is respectively connected with a pin 8 of the optical coupler U1, a pin 8 of the serial port communication chip U3 and one end of a resistor R55; a pin 7 of the serial port communication chip U3 is connected with one end of a resistor R46, and the other end of the resistor R46 is connected with the other end of a resistor R54; pin 6 of serial port communication chip U3 is connected with one end of resistor R45; the other end of the resistor R45 is connected with the other end of the resistor R55; the other end of the capacitor C20 is connected to one end of a resistor R55.
3. The digital display power network multifunctional instrument according to claim 1, wherein the switching value module comprises:
one end of the resistor R38 outputs 5V, the other end of the resistor R38 is connected with the anode of the optocoupler U6, and the emitter of the optocoupler U6 is connected with one end of the resistor R42 and the base of the triode Q1 respectively; the other end of the resistor R42 is connected with an emitting electrode of the triode Q1; the collector of the optocoupler U6 is connected with the resistor R5; the collector of the triode Q1 is connected with the anode of the diode D6;
one end of the resistor R39 outputs 5V, the other end of the resistor R39 is connected with the anode of the optocoupler U7, and the emitter of the optocoupler U7 is connected with one end of the resistor R43 and the base of the triode Q2 respectively; the other end of the resistor R43 is connected with an emitting electrode of the triode Q2; the collector of the optocoupler U7 is connected with the resistor R6; the collector of the triode Q2 is connected with the anode of the diode D7;
one end of the resistor R40 outputs 5V, the other end of the resistor R40 is connected with the anode of the optocoupler U8, and the emitter of the optocoupler U8 is connected with one end of the resistor R44 and the base of the triode Q4 respectively; the other end of the resistor R44 is connected with an emitting electrode of the triode Q4; the collector of the optocoupler U8 is connected with the resistor R7; the collector of the triode Q2 is connected with the anode of the diode D12;
one end of the resistor R41 outputs 5V, the other end of the resistor R41 is connected with the anode of the optocoupler U9, and the emitter of the optocoupler U9 is connected with one end of the resistor R45 and the base of the triode Q5 respectively; the other end of the resistor R45 is connected with an emitting electrode of the triode Q5; the collector of the optocoupler U9 is connected with the resistor R8; the collector of the transistor Q5 is connected to the anode of the diode D13.
4. The digital display electric power network multifunctional instrument as claimed in claim 1, wherein the transmitter module comprises: and multiple paths of analog quantity transmitting output, wherein each path of analog quantity transmitting output can select multiple electric quantity parameters to set, and the analog transmitting output of the electric quantity is achieved through an analog quantity transmitting module of the multifunctional instrument.
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| CN115862181A (en) * | 2023-02-01 | 2023-03-28 | 钛能科技股份有限公司 | Chain communication display instrument set and chain communication method thereof |
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