CN219891316U - Multifunctional input and output port of electric energy meter - Google Patents
Multifunctional input and output port of electric energy meter Download PDFInfo
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- CN219891316U CN219891316U CN202320819874.4U CN202320819874U CN219891316U CN 219891316 U CN219891316 U CN 219891316U CN 202320819874 U CN202320819874 U CN 202320819874U CN 219891316 U CN219891316 U CN 219891316U
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Abstract
The utility model discloses a multifunctional input and output port of an electric energy meter, which relates to the field of electric energy meters, and comprises an input channel, an output channel, an external signal terminal of the electric energy meter and a peripheral adapting circuit, wherein the input channel comprises a first change-over switch, and the output channel comprises a second change-over switch; the input channel is connected with the external signal end button of the electric energy meter, the output channel is connected with the external signal end button of the electric energy meter, and each peripheral adapting circuit sends an input signal to a corresponding input function port through the input channel; the input and output functions are switched through the external signal terminal button of the electric energy meter, when the electric energy meter is switched into the input functions, the first switch is conducted, the input channel is operated, when the electric energy meter is switched into the output functions, the second switch is conducted, the output channel is operated, the input channel and the output channel cannot operate simultaneously, the input and output functions of multiple functions can be realized through the external signal terminal button of the electric energy meter, the input and output functions of the electric energy meter are expanded, and the input and output ports are increased without the need of repairing the module again.
Description
Technical Field
The utility model relates to the field of electric energy meters, in particular to a multifunctional input/output port of an electric energy meter.
Background
In general electric energy meters, because of cost and volume limitations, the electric energy meters generally do not have the functions of inputting and outputting various signals and communicating.
The input/output ports are added by repairing the module newly, or a multifunctional or intelligent meter is adopted to meet the requirements of customers.
However, the cost of retooling is not just the cost of retooling, meaning that the original phenotype will not exist. If the multifunctional meter or the intelligent meter is adopted to meet the demands of customers, the market competitiveness of the electric energy meter is very weak, and thus the profit of the electric energy meter is very small or even the cost is lost.
Therefore, how to utilize the existing ports of the electric energy meter to realize the input and output of various signals is a technical problem to be solved urgently by the person skilled in the art.
Disclosure of Invention
The utility model aims to provide a multifunctional input/output port of an electric energy meter, which utilizes the existing port of the electric energy meter to realize the input/output of various signals.
In order to solve the above technical problems, the present utility model provides a multifunctional input/output port of an electric energy meter, including:
the input channel comprises a first change-over switch, and the output channel comprises a second change-over switch;
the input channel is connected with the external signal end button of the electric energy meter, the output channel is connected with the external signal end button of the electric energy meter, and the external signal end button of the electric energy meter is connected with the peripheral adaptation circuit;
each peripheral adapting circuit transmits an input signal to a corresponding input function port through an input channel; the output function port sends an output signal to a corresponding peripheral adaptation circuit through an output channel, wherein when the first switch is on and the input channel works, the second switch is off; when the second change-over switch is turned on and the output channel works, the first change-over switch is turned off; the electric energy meter is used for realizing the switching of input and output functions.
As a preferred solution, in the multifunctional input/output port of the electric energy meter, the second change-over switch includes: the first resistor and the first optocoupler;
the first end of the first resistor is connected with each output function port, the second end of the first resistor is connected with the negative electrode of the first optical coupler, the positive electrode of the first optical coupler is connected with a power supply, the collector electrode of the first optical coupler is connected with the positive connection port of the external signal end button of the electric energy meter, and the emitter electrode of the first optical coupler is connected with the negative connection port of the external signal end button of the electric energy meter.
As a preferable mode, in the multifunctional input/output port of the electric energy meter, the first switch includes: the second resistor, the third resistor, the fourth resistor, the first diode and the second optocoupler;
the collector of the second optocoupler is connected with the first end of the second resistor and each input function port, the second end of the second resistor is connected with a power supply, the emitter of the second optocoupler is grounded, the anode of the second optocoupler is connected with the first end of the third resistor and the negative connection port of the external signal end button of the electric energy meter, the cathode of the second optocoupler is connected with the second end of the third resistor and the first end of the fourth resistor, the second end of the fourth resistor is connected with the anode of the first diode, and the cathode of the first diode is connected with the positive connection port of the external signal end button of the electric energy meter.
As a preferable scheme, in the multifunctional input/output port of the electric energy meter, the input function port comprises a built-in communication receiving port, and the output function port comprises a built-in communication output port; the peripheral adaptation circuit includes: a communication adaptation circuit; further comprises: a fifth resistor, a second diode;
the communication adaptation circuit includes: the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the ninth resistor, the third diode, the first NPN triode and the PNP triode;
the first end of the fifth resistor is connected with the built-in communication receiving port, the second end of the fifth resistor is connected with the collector electrode of the second optical coupler, the cathode of the second diode is connected with the built-in communication output port, and the anode of the second diode is connected with the first end of the first resistor;
the positive connection port of the external signal terminal of the electric energy meter is connected with the first end of the sixth resistor, the negative electrode of the third diode and the communication external transmission port; the negative connection port of the external signal terminal button of the electric energy meter is connected with the collector electrode of the PNP triode, the first end of the eighth resistor and the first end of the ninth resistor, the second end of the sixth resistor is connected with the base electrode of the PNP triode, and the emitter electrode of the PNP triode is connected with a power supply; the positive electrode of the third diode is connected with the second end of the eighth resistor and the base electrode of the first NPN triode; the collector of the first NPN triode is connected with the first end of the seventh resistor and the communication external receiving port; the emitter of the first NPN triode and the second end of the ninth resistor are grounded.
In a preferred scheme, in the multifunctional input/output port of the electric energy meter, the output function port comprises an electric energy metering pulse output port and a clock second pulse signal output; further comprises: a fourth diode and a fifth diode;
the peripheral adaptation circuit includes: an electric energy metering and clock pulse adapting circuit; the method specifically comprises the following steps: a tenth resistor;
the electric energy metering pulse output port is connected with the cathode of a fourth diode, the clock second pulse signal output is connected with the cathode of a fifth diode, and the anodes of the fourth diode and the fifth diode are connected with the first end of a first resistor;
the first end of the tenth resistor is connected with the positive connection port and the positive output end of the external signal terminal of the electric energy meter; the second end of the tenth resistor is connected with a power supply; the negative connection port of the electric energy meter to the external signal terminal is grounded.
As a preferable scheme, in the multifunctional input/output port of the electric energy meter, the output function port comprises a load control output port; further comprises: a sixth diode;
the peripheral adaptation circuit includes: a load control circuit; the method specifically comprises the following steps: a seventh diode, a second NPN triode and an intermediate relay;
the load control output port is connected with the cathode of a sixth diode, and the anode of the sixth diode is connected with the first end of the first resistor;
the positive connection port of the electric energy meter to the external signal terminal is connected with the negative electrode of the seventh diode, the collector electrode of the second NPN triode and the first end of the coil of the intermediate relay, the negative connection port of the electric energy meter to the external signal terminal is connected with the base electrode of the second NPN triode, the emitter electrode of the second NPN triode is grounded, the second end of the coil of the intermediate relay and the negative electrode of the freewheel diode of the second intermediate relay are connected with a power supply, and the normally open contact of the intermediate relay is connected with a load.
As a preferable scheme, in the multifunctional input/output port of the electric energy meter, the output function port comprises a meter box door opening detection port; further comprises: an eleventh resistor;
the peripheral adaptation circuit includes: a meter box door opening detection circuit; the method specifically comprises the following steps: a door opening detection travel switch;
the meter box door opening detection port is connected with the first end of the eleventh resistor, and the second end of the eleventh resistor is connected with the first end of the second resistor;
the positive connection port of the external signal end button of the electric energy meter is grounded, the negative connection port of the external signal end button of the electric energy meter is connected with the first end of the door opening detection travel switch, and the second end of the door opening detection travel switch is connected with a power supply.
As a preferable scheme, in the multifunctional input/output port of the electric energy meter, the output function port comprises a rate switching port; further comprises: a twelfth resistor;
the charge rate switching port is connected with the first end of the twelfth resistor, and the second end of the twelfth resistor is connected with the first end of the second resistor;
the electric energy meter is connected with an external rate signal control source through an external signal terminal.
As a preferable scheme, in the multifunctional input/output port of the electric energy meter, the electric energy meter comprises an external signal terminal button comprising a wheel display key.
As a preferable solution, in the multifunctional input/output port of the electric energy meter, the method further includes: and the communication module is connected with the control terminal and the electric energy meter to the external signal terminal.
The utility model provides a multifunctional input/output port of an electric energy meter, comprising: the input channel comprises a first change-over switch, and the output channel comprises a second change-over switch; the input channel is connected with the external signal end button of the electric energy meter, the output channel is connected with the external signal end button of the electric energy meter, and the external signal end button of the electric energy meter is connected with the peripheral adaptation circuit; each peripheral adapting circuit transmits an input signal to a corresponding input function port through an input channel; the output function port sends an output signal to a corresponding peripheral adaptation circuit through an output channel, wherein when the first switch is on and the input channel works, the second switch is off; when the second change-over switch is turned on and the output channel works, the first change-over switch is turned off; the electric energy meter is used for realizing the switching of input and output functions. The input and output functions are switched through the external signal terminal button of the electric energy meter, when the electric energy meter is switched into the input function, the first switch is conducted, the input channel is operated, when the electric energy meter is switched into the output function, the second switch is conducted, the output channel is operated, the input channel and the output channel cannot simultaneously operate, the input and output of the multiple functions can be realized through the external signal terminal button of the electric energy meter, the input and output functions of the electric energy meter are expanded, and the input and output ports are increased without the need of repairing the die again.
Drawings
For a clearer description of embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of a multifunctional input/output port of an electric energy meter according to an embodiment of the present utility model;
FIG. 2 is a circuit diagram of an input channel and an output channel according to an embodiment of the present utility model;
fig. 3 is a circuit diagram of a communication input/output port of an electric energy meter according to an embodiment of the present utility model;
FIG. 4 is a circuit diagram of an electric energy metering and clock pulse output port according to an embodiment of the present utility model;
FIG. 5 is a circuit diagram of a load control output port according to an embodiment of the present utility model;
FIG. 6 is a circuit diagram of a door opening detection port of a watch box according to an embodiment of the present utility model;
fig. 7 is a circuit diagram of a rate switching control port according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.
The core of the utility model is to provide a multifunctional input/output port of an electric energy meter.
In order to better understand the aspects of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and detailed description.
In general electric energy meters, because of cost and volume limitations, the electric energy meters generally do not have the functions of inputting and outputting various signals and communicating. The input/output ports are typically added by reworking or a multi-function or smart meter is employed to meet customer needs.
However, the cost of the repair is not only the cost of the repair, but also means that the original phenotype will not exist. If the multifunctional meter or the intelligent meter is adopted to meet the demands of customers, the market competitiveness of the electric energy meter is very weak, and thus the profit of the electric energy meter is very small or even the cost is lost. The existing ports of the electric energy meter are utilized to realize the input and output of various signals and communication functions, and the input and output of the multifunctional signals of the common meter are realized with a small amount of cost.
In order to solve the above-mentioned problems, the present embodiment provides a multifunctional input/output port of an electric energy meter, as shown in fig. 1, including:
the input channel 11, the output channel 12, an external signal terminal button 13 of the electric energy meter and the peripheral adapting circuit 14, wherein the input channel 11 comprises a first change-over switch, and the output channel 12 comprises a second change-over switch;
the input channel 11 is connected with the electric energy meter external signal terminal 13, the output channel 12 is connected with the electric energy meter external signal terminal 13, and the electric energy meter external signal terminal 13 is connected with the peripheral adaptation circuit 14;
each peripheral adaptation circuit 14 sends an input signal to a corresponding input function port through the input channel 11; the output function port sends an output signal to a corresponding peripheral adaptation circuit 14 through the output channel 12, wherein when the first switch is turned on and the input channel 11 works, the second switch is turned off; when the second change-over switch is turned on and the output channel 12 works, the first change-over switch is turned off; the electric energy meter external signal terminal 13 is used for realizing the switching of input and output functions.
The input channel 11 mentioned in this embodiment may include a plurality of input function ports, and not limited to a specific circuit structure, each peripheral adapting circuit 14 sends an input signal to a corresponding input function port through the input channel 11, for example, the peripheral adapting circuit 14 is configured to receive a signal or monitor a state, and then send a signal to a corresponding input function port through the input channel 11, and further send the signal to a main control chip of the electric energy meter for data analysis or storage.
The output channel 12 mentioned in this embodiment may include a plurality of output function ports, without limiting a specific circuit structure, where the output function ports send output signals to the corresponding peripheral adaptation circuits 14 through the output channel 12, for example, the electric energy meter needs to send control signals or parameter output signals to external loads, and send output signals to the corresponding peripheral adaptation circuits 14 through the output channel 12.
The specific structure of the peripheral adapting circuit 14 is not limited in this embodiment, and may be set according to practical situations. The implementation manner of the first switch and the second switch is not limited, and when the first switch is turned on and the input channel 11 works, the second switch is turned off; when the second change-over switch is turned on and the output channel 12 works, the first change-over switch is turned off.
The embodiment provides a multi-functional input/output port of electric energy meter, includes: the input channel 11, the output channel 12, an external signal terminal button 13 of the electric energy meter and the peripheral adapting circuit 14, wherein the input channel 11 comprises a first change-over switch, and the output channel 12 comprises a second change-over switch; the input channel 11 is connected with the electric energy meter external signal terminal 13, the output channel 12 is connected with the electric energy meter external signal terminal 13, and the electric energy meter external signal terminal 13 is connected with the peripheral adaptation circuit 14; each peripheral adaptation circuit 14 sends an input signal to a corresponding input function port through the input channel 11; the output function port sends an output signal to a corresponding peripheral adaptation circuit 14 through the output channel 12, wherein when the first switch is turned on and the input channel 11 works, the second switch is turned off; when the second change-over switch is turned on and the output channel 12 works, the first change-over switch is turned off; the electric energy meter external signal terminal 13 is used for realizing the switching of input and output functions. The input and output functions are switched through the external signal terminal 13 of the electric energy meter, when the electric energy meter is switched into the input functions, the first switch is conducted, the input channel works, when the electric energy meter is switched into the output functions, the second switch is conducted, the output channel works, the input channel and the output channel cannot work simultaneously, the input and output of the multiple functions can be realized through the external signal terminal of the electric energy meter, the input and output functions of the electric energy meter are expanded, and the input and output ports are increased without the need of repairing the die again.
According to the above embodiment, this embodiment provides a preferred solution, as shown in fig. 2, the second change-over switch includes: the first resistor R1 and the first optical coupler OP1;
the first end of the first resistor R1 is connected with each output functional port, the second end of the first resistor R1 is connected with the negative electrode of the first optical coupler OP1, the positive electrode of the first optical coupler OP1 is connected with a power supply, the collector electrode of the first optical coupler OP1 is connected with the positive connection port of the electric energy meter external signal end button 13, and the emitter electrode of the first optical coupler OP1 is connected with the negative connection port of the electric energy meter external signal end button 13.
The electric energy meter is provided with an external signal terminal 13, namely a terminal S in fig. 2. In general, a common electric energy meter will have a pulse output port, and the pulse output adopted in this embodiment is used as the output channel 12, but the present embodiment is not limited to realizing pulse output, and can be used for output expansion of other signals.
According to the above embodiment, the present embodiment provides a preferable solution, as shown in fig. 2, the first switching switch includes: the second resistor R2, the third resistor R3, the fourth resistor R4, the first diode D1 and the second optocoupler OP2;
the collector of the second optocoupler OP2 is connected with the first end of the second resistor R2 and each input function port, the second end of the second resistor R2 is connected with a power supply, the emitter of the second optocoupler OP2 is grounded, the anode of the second optocoupler OP2 is connected with the first end of the third resistor R3 and the negative connection port of the electric energy meter external signal end button 13, the cathode of the second optocoupler OP2 is connected with the second end of the third resistor R3 and the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected with the anode of the first diode D1, and the cathode of the first diode D1 is connected with the positive connection port of the electric energy meter external signal end button 13.
Through the scheme provided by the embodiment, the input signals of the peripheral adapting circuit 14 are sent to each input function port through the input channel 11, and then sent to the main control chip, so that the function expansion through the input signals is realized.
According to the above embodiment, the present embodiment provides a preferred solution, as shown in fig. 3, the input function port includes a built-in communication receiving port, and the output function port includes a built-in communication output port; the peripheral adaptation circuit 14 comprises: a communication adaptation circuit; further comprises: a fifth resistor R5 and a second diode D2;
the communication adaptation circuit includes: a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a third diode D3, a first NPN triode Q1 and a PNP triode Q2;
the first end of the fifth resistor R5 is connected with the built-in communication receiving port RXD_M, the second end of the fifth resistor R5 is connected with the collector electrode of the second optical coupler OP2, the negative electrode of the second diode D2 is connected with the built-in communication output port TXD_M, and the positive electrode of the second diode D2 is connected with the first end of the first resistor R1;
the positive connection port of the external signal terminal button 13 of the electric energy meter is connected with the first end of the sixth resistor R6, the negative electrode of the third diode D3 and the communication external transmission port TXD; the negative connection port of the electric energy meter external signal terminal button 13 is connected with the collector electrode of the PNP triode Q2, the first end of the eighth resistor R8 and the first end of the ninth resistor R9, the second end of the sixth resistor R6 is connected with the base electrode of the PNP triode Q2, and the emitter electrode of the PNP triode Q2 is connected with a power supply; the positive electrode of the third diode D3 is connected with the second end of the eighth resistor R8 and the base electrode of the first NPN triode Q1; the collector of the first NPN triode Q1 is connected with the first end of the seventh resistor R7 and the communication external receiving port RXD; the emitter of the first NPN triode Q1 and the second end of the ninth resistor R9 are grounded.
In this embodiment, the external communication transmitting port TXD and the external communication receiving port RXD are connected to the host computer, when the host computer initiates communication through the communication adapter circuit, and taking the transmission start bit as an example, the external communication transmitting port TXD is set low, the PNP transistor Q2 is saturated and turned on by the base current limiting resistor sixth resistor R6, the current loop of the signal transmitted by the external communication transmitting port TXD is 3V3 power supply→pnp transistor Q2→second optocoupler OP2// third resistor R3→fourth resistor R4→first diode D1→external communication transmitting port TXD, the current bypassed by the third resistor R3 in the second optocoupler OP2// third resistor R3 in the loop is negligible, at this time, the primary side light emitting tube of the second optocoupler OP2 is turned on, the secondary side triode is saturated and turned on, and the internal communication receiving port rxd_m is pulled low. Thus, the signal transmission function of the communication external transmitting port TXD-built-in communication receiving port RXD_M is realized. When the communication external transmitting port TXD is restored to a high level, the PNP triode Q2 is cut off, and no current flows through the primary side of the second optocoupler OP2, so that the secondary side triode is cut off, and the built-in communication receiving port RXD_M is pulled up under the action of the second section of the pull-up resistor. This completes the transmission of one bit.
Under the action of the third diode D3, when the communication external transmitting port TXD is set low, due to the existence of the third diode D3, the base of the first NPN triode Q1 is pulled low, the first NPN triode Q1 is turned off, and the communication external receiving port RXD continues to keep high level under the action of the seventh resistor R7 of the pull-up resistor, so that the problem of self-receiving is avoided. Of course, if the host computer turns off the reception of the signal during transmission, the third diode D3 does not need to be installed.
When the electric energy meter responds to the communication, taking the transmission start bit as an example. The built-in communication output port TXD_M is set low, the second diode D2 is conducted, the sending signal current loop is a digital power supply DVDD→a first optocoupler OP1→a first resistor R1→a second diode D2→the built-in communication output port TXD_M, at this time, a primary side luminous tube of the first optocoupler OP1 is lightened, a secondary side triode is saturated and conducted, at this time, because TXD of the external communication equipment is high level, when the secondary side of the first optocoupler OP1 is conducted, the first end of a ninth resistor R9 is also high level, then the first NPN triode Q1 is conducted through an eighth resistor R8 of a base current limiting resistor, and a communication external receiving port RXD is pulled low. Thus, the signal transmission from the built-in communication output port TXD_M to RXD is realized. When the internal communication output port txd_m is restored to the high level, the second diode D2 is turned off, and then no current flows through the primary side of the first optocoupler OP1, and then the secondary side transistor thereof is turned off, and the base of the first NPN transistor Q1 is pulled to the low level by the ninth resistor R9, so that the first NPN transistor Q1 is turned off. Meanwhile, the communication external receiving port RXD is restored to a high level under the action of the pull-up resistor seventh resistor R7. Thus, the external communication equipment completes one-time receiving.
The signals output by the communication external transmitting port TXD and the communication external receiving port RXD are TTL levels, and if an RS232 or RS485 interface is needed, conversion is needed.
Because the reverse withstand voltage of the primary side luminotron of the second optocoupler OP2 is lower, the diode reverse maximum withstand Voltage (VR) is only 6V, so the first diode D1 and the third resistor R3 are added, and because the reverse impedance of the first diode D1 is far greater than that of the third resistor R3, the reverse voltage is almost born by the first diode D1, and the safety of the second optocoupler OP2 is ensured. The fourth resistor R4 is a current limiting resistor, so as to avoid damage to the second optocoupler OP2 caused by excessive working current.
Through the scheme provided by the embodiment, the existing ports of the electric energy meter are utilized to realize the input and output of various signals and the communication function.
According to the above embodiment, the present embodiment provides a preferable solution, as shown in fig. 4, the output function ports include an electric energy metering PULSE output port pulseactive, and a clock second PULSE signal output port CLKOUT; further comprises: a fourth diode D4 and a fifth diode D5;
the peripheral adaptation circuit 14 comprises: an electric energy metering and clock pulse adapting circuit; the method specifically comprises the following steps:
a tenth resistor R10;
the electric energy metering PULSE output port pulse_active is connected with the cathode of a fourth diode D4, the clock second PULSE signal output port CLKOUT is connected with the cathode of a fifth diode D5, and the anodes of the fourth diode D4 and the fifth diode D5 are connected with the first end of a first resistor R1;
the first end of the tenth resistor R10 is connected with the positive connection port and the positive output end of the external signal end button 13 of the electric energy meter; the second end of the tenth resistor R10 is connected with a power supply; the negative connection port of the electric energy meter to the external signal terminal 13 is grounded.
In this embodiment, when the electric energy metering and clock pulse adapting circuit outputs as the electric energy metering pulse, the primary side light emitting tube of the first diode D1 and the second optocoupler OP2 is turned off reversely, so that the original function is not affected. The other ports of the output function port are all high level, the PULSE signal output by the pulse_active of the electric energy metering PULSE output port is isolated and output by the PULSE signal through the fourth diode D4, the first resistor R1 and the first optical coupler OP1, and the passive switching value signal is converted into an electric PULSE signal through a pull-up resistor tenth resistor R10 by a 15-27V power supply of the meter.
The electric energy metering and clock pulse adapting circuit has similar output function with the electric energy metering pulse when being used as the clock second pulse, at the moment, the other ports of the output function port are all high level, the output signal of the clock second pulse signal output port CLKOUT is output through a fifth diode D5, the first resistor R1 and the first optocoupler OP1 realize the isolation output of pulse signals, and the passive switching value signals are converted into electric pulse signals through a pull-up resistor tenth resistor R10 by a 15-27V power supply of a table.
According to the above embodiment, the present embodiment provides a preferable solution, as shown in fig. 5, the output function ports include load_control output ports; further comprises: a sixth diode D6;
the peripheral adaptation circuit 14 comprises: a load control circuit; the method specifically comprises the following steps: the second NPN triode Q3, the intermediate relay J1 and the freewheel diode D7 of the intermediate relay J1;
the LOAD CONTROL output port LOAD_CONTROL is connected with the cathode of a sixth diode D6, and the anode of the sixth diode D6 is connected with the first end of the first resistor R1;
the positive connection port of the electric energy meter external signal terminal 13 is connected with the positive pole of the follow current diode of the intermediate relay J1, the collector of the second NPN triode Q3 and the first end of the coil of the intermediate relay J1, the negative connection port of the electric energy meter external signal terminal 13 is connected with the base of the second NPN triode Q3, the emitter of the second NPN triode Q3 is grounded, the second end of the coil of the intermediate relay J1 and the negative pole of the follow current diode D7 of the second intermediate relay J1 are connected with a power supply, and the normally open contact of the intermediate relay J1 is connected with a load.
When LOAD CONTROL output is carried out, the other ports of the output function port are all high level, a LOAD CONTROL signal output by the LOAD CONTROL output port load_control is isolated and output by the LOAD CONTROL signal through a sixth diode D6, a first resistor R1 and a first optocoupler OP1, a secondary side triode of the first optocoupler OP1 and a second NPN triode Q3 are combined to improve driving force for driving an intermediate relay J1, and then a normally open contact of the intermediate relay J1 is utilized for controlling external LOAD. The seventh diode D7 is a freewheeling diode of the intermediate relay J1, and is configured to absorb the back voltage of the relay, so as to ensure the safety of the second NPN triode Q3.
According to the above embodiment, the present embodiment provides a preferable solution, as shown in fig. 6, the output function port includes a meter box door opening detection port DOPEN; further comprises: an eleventh resistor R11;
the peripheral adaptation circuit 14 comprises: a meter box door opening detection circuit; the method specifically comprises the following steps: a door opening detection travel switch K;
the meter box door opening detection port DOPEN is connected with the first end of an eleventh resistor R11, and the second end of the eleventh resistor R11 is connected with the first end of a second resistor R2;
the positive connection port of the electric energy meter external signal terminal 13 is grounded, the negative connection port of the electric energy meter external signal terminal 13 is connected with the first end of the door opening detection travel switch K, and the second end of the door opening detection travel switch K is connected with a power supply.
When the door opening detection function is performed, the output function port is at a high level, the secondary side of the first optical coupler OP1 is cut off, and the external signal end button 13 of the electric energy meter cannot be affected. In addition, the other ports of the input functional ports are connected to the input port of the main control chip, and the output state of the second optical coupler OP2 is not affected, so that only relevant circuits are reserved in the process of analysis. The right side K of the diagram is a door opening detection travel switch K of the meter box, when the meter box is opened and closed by the travel switch, a current loop is formed by a power supply VP, a second optocoupler OP2// a third resistor R3, a fourth resistor R4, a first diode D1 and a grounding end GND_P, at the moment, the secondary side of the second optocoupler OP2 is saturated and conducted, a meter door opening detection port DOPEN is pulled down by an eleventh resistor R11, and a meter records a meter box opening event, so that a meter door opening detection function is realized.
According to the above embodiment, the present embodiment provides a preferable solution, as shown in fig. 7, the output function port includes a tariff switching port PRICE; further comprises: a twelfth resistor R12;
the charge rate switching port PRICE is connected with the first end of a twelfth resistor R12, and the second end of the twelfth resistor R12 is connected with the first end of a second resistor R2;
the electric energy meter is connected with an external rate signal control source through an external signal terminal 13.
The external rate signal control source W1 is directly connected to the external signal terminal 13 of the electric energy meter, when the external rate signal control source W1 is in the rate 1, no output is generated, the second optical coupler OP2 is cut off, and the rate switching port PRICE signal outputs a high level under the action of the second resistor R2 of the pull-up resistor. When the power factor is in the power factor 2, the external power factor signal control source W1 outputs a signal to enable the second optocoupler OP2 to be conducted, the PRICE signal is pulled down by the secondary side triode of the second optocoupler OP2, and the power factor switching function is completed.
According to the above embodiment, in order to conveniently realize the switching of the input and output functions, the present embodiment provides a preferred scheme, and the external signal terminal 13 of the electric energy meter includes a wheel display key.
The switching of the output mode of the electric energy meter to the external signal terminal 13 can be realized by a wheel display key, for example, the switching can be defined as double-click or long-press.
The switching of the functional modes can also be performed by means of menu options.
If the meter has no wheel display key, the embodiment provides a preferable scheme, and the method further comprises the following steps: and the communication module is connected with the control terminal and the electric energy meter external signal terminal 13.
Through communication module, control terminal can control the electric energy meter to switch over to required mode to external signal end button 13 to the electric energy meter by sending function switching instruction, more is fit for intelligent manufacturing's automation line.
The multifunctional input and output ports of the electric energy meter provided by the utility model are described in detail above. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A multifunctional input/output port of an electric energy meter, comprising:
the electric energy meter comprises an input channel (11), an output channel (12), an external signal terminal (13) of the electric energy meter and a peripheral adaptation circuit (14), wherein the input channel (11) comprises a first change-over switch, and the output channel (12) comprises a second change-over switch;
the input channel (11) is connected with the electric energy meter external signal end button (13), the output channel (12) is connected with the electric energy meter external signal end button (13), and the electric energy meter external signal end button (13) is connected with the peripheral adaptation circuit (14);
each peripheral adaptation circuit (14) sends an input signal to a corresponding input function port through the input channel (11); an output function port sends an output signal to the corresponding peripheral adaptation circuit (14) through the output channel (12), wherein when the first switch is turned on and the input channel (11) works, the second switch is turned off; when the second change-over switch is turned on and the output channel (12) works, the first change-over switch is turned off; the electric energy meter is used for realizing switching of input and output functions by the external signal terminal (13).
2. The multifunction input and output port of an electrical energy meter of claim 1, wherein the second diverter switch comprises: the first resistor and the first optocoupler;
the first end of the first resistor is connected with each output function port, the second end of the first resistor is connected with the negative electrode of the first optocoupler, the positive electrode of the first optocoupler is connected with a power supply, the collector electrode of the first optocoupler is connected with the positive connection port of the electric energy meter external signal terminal (13), and the emitter electrode of the first optocoupler is connected with the negative connection port of the electric energy meter external signal terminal (13).
3. The multifunction input and output port of an electrical energy meter of claim 2, wherein the first switch comprises: the second resistor, the third resistor, the fourth resistor, the first diode and the second optocoupler;
the collector of the second optocoupler is connected with the first end of the second resistor and each input function port, the second end of the second resistor is connected with a power supply, the emitter of the second optocoupler is grounded, the anode of the second optocoupler is connected with the first end of the third resistor and the negative connection port of the electric energy meter external signal end button (13), the cathode of the second optocoupler is connected with the second end of the third resistor and the first end of the fourth resistor, the second end of the fourth resistor is connected with the anode of the first diode, and the cathode of the first diode is connected with the positive connection port of the electric energy meter external signal end button (13).
4. The multifunction input-output port of claim 3, wherein the input function port comprises a built-in communication receiving port and the output function port comprises a built-in communication output port; the peripheral adaptation circuit (14) comprises: a communication adaptation circuit; further comprises: a fifth resistor, a second diode;
the communication adaptation circuit comprises: the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, the ninth resistor, the third diode, the first NPN triode and the PNP triode;
the first end of the fifth resistor is connected with the built-in communication receiving port, the second end of the fifth resistor is connected with the collector electrode of the second optical coupler, the negative electrode of the second diode is connected with the built-in communication output port, and the positive electrode of the second diode is connected with the first end of the first resistor;
the positive connection port of the external signal terminal button (13) of the electric energy meter is connected with the first end of the sixth resistor, the negative electrode of the third diode and the communication external transmission port; the negative connection port of the external signal terminal button (13) of the electric energy meter is connected with the collector electrode of the PNP triode, the first end of the eighth resistor and the first end of the ninth resistor, the second end of the sixth resistor is connected with the base electrode of the PNP triode, and the emitter electrode of the PNP triode is connected with a power supply; the positive electrode of the third diode is connected with the second end of the eighth resistor and the base electrode of the first NPN triode; the collector electrode of the first NPN triode is connected with the first end of the seventh resistor and the communication external receiving port; and the emitter of the first NPN triode and the second end of the ninth resistor are grounded.
5. The multifunction input-output port of the electric energy meter according to claim 2, wherein the output function port comprises an electric energy metering pulse output port, a clock second pulse signal output port; further comprises: a fourth diode and a fifth diode;
the peripheral adaptation circuit (14) comprises: an electric energy metering and clock pulse adapting circuit; the method specifically comprises the following steps: a tenth resistor;
the electric energy metering pulse output port is connected with the cathode of the fourth diode, the clock second pulse signal output port is connected with the cathode of the fifth diode, and the anodes of the fourth diode and the fifth diode are connected with the first end of the first resistor;
the first end of the tenth resistor is connected with the positive connection port and the positive output end of an external signal terminal (13) of the electric energy meter; a second end of the tenth resistor is connected with a power supply; the negative connection port of the external signal terminal button (13) of the electric energy meter is grounded.
6. The multifunction input-output port of an electrical energy meter of claim 2, wherein the output function port comprises a load control output port; further comprises: a sixth diode;
the peripheral adaptation circuit (14) comprises: a load control circuit; the method specifically comprises the following steps: a second NPN triode and an intermediate relay;
the load control output port is connected with the cathode of the sixth diode, and the anode of the sixth diode is connected with the first end of the first resistor;
the positive connection port of the electric energy meter external signal end button (13) is connected with the positive electrode of the follow current diode of the intermediate relay, the collector electrode of the second NPN triode and the first end of the coil of the intermediate relay, the negative connection port of the electric energy meter external signal end button (13) is connected with the base electrode of the second NPN triode, the emitting electrode of the second NPN triode is grounded, the second end of the coil of the intermediate relay and the negative electrode of the follow current diode of the intermediate relay are connected with a power supply, and the normally open contact of the intermediate relay is connected with a load.
7. A multifunction i/o port for an electrical energy meter according to claim 3, wherein said output function port comprises a meter door opening detection port; further comprises: an eleventh resistor;
the peripheral adaptation circuit (14) comprises: a meter box door opening detection circuit; the method specifically comprises the following steps: a door opening detection travel switch;
the meter box door opening detection port is connected with the first end of the eleventh resistor, and the second end of the eleventh resistor is connected with the first end of the second resistor;
the positive connection port of the electric energy meter external signal end button (13) is grounded, the negative connection port of the electric energy meter external signal end button (13) is connected with the first end of the door opening detection travel switch, and the second end of the door opening detection travel switch is connected with a power supply.
8. A multi-function input/output port for an electrical energy meter according to claim 3, wherein said output function port comprises a rate switching port; further comprises: a twelfth resistor;
the charge rate switching port is connected with the first end of the twelfth resistor, and the second end of the twelfth resistor is connected with the first end of the second resistor;
the electric energy meter is connected with an external rate signal control source through an external signal terminal (13).
9. The multifunction input-output port of electric energy meter according to any of the claims 1 to 8, characterized in that the electric energy meter external signal terminal (13) comprises a wheel display key.
10. The multifunction input and output port of an electrical energy meter of claim 1, further comprising: and the communication module is connected with the control terminal and the electric energy meter external signal terminal (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320819874.4U CN219891316U (en) | 2023-04-07 | 2023-04-07 | Multifunctional input and output port of electric energy meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320819874.4U CN219891316U (en) | 2023-04-07 | 2023-04-07 | Multifunctional input and output port of electric energy meter |
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| CN219891316U true CN219891316U (en) | 2023-10-24 |
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| CN202320819874.4U Active CN219891316U (en) | 2023-04-07 | 2023-04-07 | Multifunctional input and output port of electric energy meter |
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| CN (1) | CN219891316U (en) |
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