CN207502603U - A kind of multiple metering ammeter - Google Patents
A kind of multiple metering ammeter Download PDFInfo
- Publication number
- CN207502603U CN207502603U CN201721670171.0U CN201721670171U CN207502603U CN 207502603 U CN207502603 U CN 207502603U CN 201721670171 U CN201721670171 U CN 201721670171U CN 207502603 U CN207502603 U CN 207502603U
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- metering
- ammeter
- sent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model provides a kind of multiple metering ammeter, suitable for intelligent electric meter field.The multiple metering ammeter of the utility model includes：Signal acquisition module, metering module and communication module.Signal acquisition module is electrical connected with metering module, for acquiring multi-channel electric signal from the multiple power grids being electrical connected with itself, and collected multi-channel electric signal is sent to metering module, multiple power grids correspond respectively with multi-channel electric signal, which is multichannel analog signals.Metering module is electrical connected with communication module, for receiving multichannel analog signals, and multichannel analog signals is converted to multi-path digital signal, and generate multiple ammeter datas according to the multi-path digital signal and be sent to communication module.Communication module, for receiving multiple ammeter datas and being sent to server, so that the server receives and shows multiple ammeter datas.The multiple metering ammeter can improve the accuracy of electric energy detection, reduce production cost and convenient for assembling and debugging.
Description
Technical field
The utility model is suitable for intelligent electric meter field more particularly to a kind of multiple metering ammeter.
Background technology
With the development of economy, metering ammeter is indispensable for electrical system, and traditional AC ammeter is
It is difficult to meet using needs in increasingly sophisticated application scenarios.For the monitoring electricity consumption quantity such as computer room, base station or power distribution station pole
For more occasions, multiple metering ammeter comes into being, and possesses more and more extensive purposes in electrical system engineering.
The hardware plan of multiple metering ammeter currently on the market generally includes microcontroller, operational amplifier and reference voltage
Source, but this scheme need hardware circuit device is more, electric energy detection error greatly, production cost is higher, circuit is complicated and
It is unfavorable for assembling and debugs.Alternatively, the hardware plan that multiple metering ammeter uses includes microcontroller and Multifunctional measuring chip, but
Be this scheme production cost it is higher.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of multiple metering ammeters, can improve electric energy detection
Accuracy reduces production cost and convenient for assembling and debugging.
The utility model provides a kind of multiple metering ammeter, which includes：Signal acquisition module, metering mould
Block and communication module；The signal acquisition module is electrical connected with the metering module, for more from what is be electrical connected with itself
A power grid acquires multi-channel electric signal, and collected multi-channel electric signal is sent to the metering module, multiple power grids point
It is not corresponded with electric signal described in multichannel, the multi-channel electric signal is multichannel analog signals；The metering module leads to described
News module is electrical connected, and for receiving the multichannel analog signals, and the multichannel analog signals is converted to multi-path digital letter
Number, and multiple ammeter datas are generated according to the multi-path digital signal and are sent to the communication module；The communication module, is used for
It receives the multiple ammeter data and is sent to server, so that the server receives and shows the multiple ammeter data.
From above-described embodiment it is found that acquiring multi-channel electric signal by signal acquisition module, metering module converts the Multi-path electricity
Signal, and multiple ammeter datas are generated according to the multi-path digital signal and are sent to communication module, then by communication module to receive this more
A ammeter data is simultaneously sent to server, and server is caused to receive and show multiple ammeter datas, and what is needed in the program is hard
Part circuit devcie is few, and can improve the accuracy of multiple electric energy detections, reduce production cost and convenient for assembling and debugging.
Description of the drawings
Fig. 1 is the structure diagram of multiple metering ammeter that the first embodiment of the utility model provides；
Fig. 2 is the structure diagram of multiple metering ammeter that the second embodiment of the utility model provides；
Fig. 3 is the circuit of the electric signal protection circuit in the multiple metering ammeter that the second embodiment of the utility model provides
Schematic diagram；
Fig. 4 is the circuit of the electric signal sample circuit in the multiple metering ammeter that the second embodiment of the utility model provides
Schematic diagram；
Fig. 5 is the circuit theory of the computation chip in the multiple metering ammeter that the second embodiment of the utility model provides
Figure；
Fig. 6 is that the sample circuit of the computation chip in the multiple metering ammeter that the second embodiment of the utility model provides is former
Reason figure；
Fig. 7 is the circuit of the electric signal sample circuit in the multiple metering ammeter that the 3rd embodiment of the utility model provides
Schematic diagram.
Specific embodiment
Purpose of utility model, feature, advantage to enable the utility model is more apparent and understandable, below will knot
The attached drawing in the utility model embodiment is closed, the technical scheme in the utility model embodiment is clearly and completely described,
Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all embodiments.Based on the utility model
In embodiment, those skilled in the art's all other embodiments obtained without making creative work, all
Belong to the range of the utility model protection.
Referring to Fig. 1, Fig. 1 is the structure diagram of multiple metering ammeter that the first embodiment of the utility model provides.It should
Multiple metering ammeter includes：Signal acquisition module 101, metering module 102 and communication module 103, signal acquisition module 101 and meter
Amount module 102 is electrical connected, and metering module 102 is electrical connected with communication module 103.As shown in Figure 1, in the present embodiment, it is more
The operation principle of road metering ammeter is：
Signal acquisition module 101 acquires multi-channel electric signal from the multiple power grids being electrical connected with itself, and will be collected
Multi-channel electric signal is sent to metering module 102, and multi-channel electric signal is multichannel analog signals, multiple power grids respectively with multi-channel electric signal
It corresponds.
The operation principle of signal acquisition module 101 is, when the electricity consumption for using multiple metering ammeter metering power grid, to need
Signal acquisition module 101 is electrically connected on multiple power grids, multiple power grids can use electric line to be multiple.Signal acquisition module
101 acquire multi-channel electric signal from the multiple power grids being connected with itself, which can be that voltage signal or electric current are believed
Number, it is possible to understand that, multi-channel electric signal can be plurality of voltages signal or multichannel current signal, multiple power grids and Multi-path electricity
Signal corresponds.Based on the considerations of power transmission cost, the signal transmitted in transmission channel at present is usually analog signal, because
This, it is possible to understand that, 101 collected multi-channel electric signal of signal acquisition module is multichannel analog signals.It and will be collected more
Road electric signal is sent to metering module 102, carries out subsequent electric quantity metering record and processing.
Metering module 102 receives multichannel analog signals, and multichannel analog signals are converted to multi-path digital signal, and according to
Multi-path digital signal generates multiple ammeter datas and is sent to communication module 103.
The operation principle of metering module 102 is, since analog signal is during transmission, what is be superimposed with analog signal is dry
It is difficult separation to disturb signal, and interference signal can increase, and then influence accuracy of instrument with transmission, the amplification of analog signal,
And the information in digital signal is included among the presence or absence of pulse, as long as therefore the absolute value of interference signal be not above presetting
Threshold value, then the mode of regenerative repeating can be used in appropriately distance or Signal Terminal, remove the interference signal, ensures letter
Number transmission stability.And digital signal is since using binary-coded mode, confidentiality is higher than analog signal.Cause
After this metering module 102 receives the multichannel analog signals of the transmission of signal acquisition module 101, which is converted to
Multi-path digital signal, and multiple ammeter datas are generated according to multi-path digital signal and are sent to communication module 103, it is subsequent to perform
Processing operation.
Optionally, multiple ammeter datas include but not limited to：Active power and active energy, reactive power and idle electricity
Can, the data such as apparent energy and apparent electric energy, voltage effective value, current effective value and frequency.
Communication module 103 receives multiple ammeter datas and is sent to server, so that server receives and shows multiple electricity
Table data.
The operation principle of communication module 103 is that communication module 103 receives multiple ammeter numbers of the transmission of metering module 102
According to rear, multiple ammeter data is sent to server, so that server receives and shows multiple ammeter datas, for the people that works
Member checks.Optionally, server can be handled and analyzed to the ammeter data, such as calculation interval electricity consumption, according to the period
Electricity consumption is scheduled electric power.
In the present embodiment, multi-channel electric signal being acquired by signal acquisition module, metering module converts the multi-channel electric signal,
And multiple ammeter datas are generated according to the multi-path digital signal and are sent to communication module, then multiple ammeter is received by communication module
Data Concurrent gives server, and server is caused to receive and show multiple ammeter datas, the hardware circuit needed in the program
Device is few, and can improve the accuracy of multiple electric energy detections, reduce production cost and convenient for assembling and debugging.
Referring to Fig. 2 to Fig. 6, Fig. 2 is the structural representation of multiple metering ammeter that the second embodiment of the utility model provides
Figure；Fig. 3 is the circuit theory of the electric signal protection circuit in the multiple metering ammeter that the second embodiment of the utility model provides
Figure；Fig. 4 is the circuit theory of the electric signal sample circuit in the multiple metering ammeter that the second embodiment of the utility model provides
Figure；Fig. 5 is the circuit diagram of the computation chip in the multiple metering ammeter that the second embodiment of the utility model provides；Fig. 6
Be the utility model second embodiment provide multiple metering ammeter in computation chip sample circuit schematic diagram.With Fig. 1
Unlike the multiple metering ammeter provided in shown the utility model embodiment, as shown in Figures 2 to 6, in the present embodiment,
The operation principle of multiple metering ammeter is：
Further, signal acquisition module 101 includes multiple electric signal sample circuits 1011.Metering module 102 includes meter
Measure chip 1021.Multiple electric signal sample circuits 1011 are electrical connected with computation chip 1021.
Specifically, multiple electric signal sample circuits 1011 measure the electricity consumption of multiple power grids, an electric signal is adopted
Sample circuit 1011 can acquire the electric signal of a power grid, which can be voltage signal or current signal.Computation chip
1021 be the minimum computation chip of metering module 102, provides metering required High Accuracy Parameter for metering module 102, if any
Work(power, active energy, reactive power and reactive energy etc..In practical applications, the chip that computation chip 1021 uses can be for
ATT7037 chips, the chip have the advantages that low-power consumption and high performance.
The operation principle of electric signal sample circuit 1011 is, electric signal sample circuit 1011 is from the electricity being electrical connected with itself
Net acquisition electric signal, and collected electric signal is sent to computation chip 1021, which is analog signal.It is appreciated that
, multiple electric signal sample circuits 1011 will be more from the collected multiple electric signal transmissions of multiple power grids to computation chip 1021
A electric signal is multiple analog signals.After computation chip 1021 receives the analog signal, multiple analog signals are converted into multiple
Digital signal, and multiple digital signals are handled, it generates multiple ammeter datas and is sent to communication module 103.Such as Fig. 3 and figure
Shown in 4, electric signal sample circuit 1011 acquires electric signal from port IA+ and IA-, and metering is sent to from port V1P and port V1N
Chip 1021.
Further, 1011 collected electric signal of electric signal sample circuit is voltage signal, then electric signal sample circuit
1011 include protection circuit 10111, plug-in unit resistance 10112, current mode voltage transformer 10113, sampling resistor 10114 and filtering
Device 10115.As shown in Figures 3 and 4, protection circuit 10111 is in parallel with plug-in unit resistance 10112, plug-in unit resistance 10112 and current mode
Voltage transformer 10113 is connected, and current mode voltage transformer 10113 is in parallel with sampling resistor 10114, sampling resistor 10114 with
Wave filter 10115 is electrically connected, and wave filter 10115 is connected with computation chip 1021.
The operation principle of protection circuit 10111 is that protection circuit 10111 may include that varistor and transient state inhibit
(Transient Voltage Suppressor, TVS) diode, the varistor are connected with the TVS diode, form protection
Circuit 10111.The varistor can be D5D681K series varistors, which can be CD-LT85G600L series two
Pole pipe.For the voltage signal that collected absolute value is larger, based on shorter response time and higher surge absoption ability,
Protection circuit 10111 plays over-voltage protection function to electric signal sample circuit 1011.Illustratively, if electric signal sample circuit
10111 by port IA+ and IA- receive voltage range be 0-460V (units：Volt), then when collected voltage signal is more than
During 460V, protection circuit 10111 plays the role of overvoltage protection, and the voltage signal of acquisition is controlled in 0-460V and passes through end
Mouth VA and port VAN is sent to plug-in unit resistance 10112.
The operation principle of plug-in unit resistance 10112 is that plug-in unit resistance 10112 receives protection electricity by port VA and port VAN
Treated on road 10111 voltage signal, the voltage signal of reception is converted, adaptation analog signal is obtained and is sent to electric current
Type voltage transformer 10113, the adaptation analog signal are current signal.Illustratively, the resistance value of plug-in unit resistance 10112 can be
220000 Ω (units：Ohm), the voltage signal of the 0-460V of reception is converted into 0-2mA (units：Milliampere) current signal.
The operation principle of current mode voltage transformer 10113 is that current mode voltage transformer 10113 receives adaptation simulation
After signal, which by electromagnetic induction is converted, obtains converting analogue signals.Illustratively, current mode
Voltage transformer 10113 includes first winding and secondary windings, and first winding accesses power grid, secondary windings access multiple metering electricity
Table when accessing electric signal in first winding, due to electromagnetic induction, induces electromotive force, if secondary windings in secondary windings
It is powered, then can generate electric signal, therefore, which is electrically connected with being adapted to be not present between analog signal, so as to
Multiple metering ammeter with power grid is isolated, and causes multiple metering ammeter that there is good anti lightning interference performance.
The operation principle of sampling resistor 10114 is that sampling resistor 10114 receives the converting analogue signals, and this is converted
Analog signal is converted, and is obtained transformation analog signal and is sent to wave filter 10115, which believes for voltage
Number, which is current signal.Illustratively, the resistance value of sampling resistor 10114 is 100 Ω, by the electric current of 0-2mA
Signal is transformed to the voltage signal of 0-200mV.
The operation principle of wave filter 10115 is that after wave filter 10115 receives the transformation analog signal, which is simulated
High-frequency interferencing signal in signal is filtered out, and is obtained target simulation signal and is passed through port V1P and port VIN is sent to metering
Chip 1021.The frequency values of the high-frequency interferencing signal are more than the frequency values of the target simulation signal.Illustratively, wave filter
10115 be low-pass filter, and including filter resistance and filter capacitor, the resistance value of the filter resistance is 1200 Ω, the filter capacitor
Capacitance be 33nF (units：Nanofarad), which connects with sampling resistor 10114, the filter capacitor and sampling resistor
10114 is in parallel, and the filter resistance and filter capacitor form wave filter 10115, eliminate signal interference.
The operation principle of computation chip 1021 is that as shown in Figures 5 and 6, computation chip 1021 includes multiple programmable increasings
Beneficial amplifier (Pmgrammable Gain Amplifier, PGA) 10211 and multiple analog-digital converter (Analog-to-
Digital Converter, ADC) quantity of 10212, PGA10211, the quantity of ADC10212 and electric signal sample circuit
1011 quantity is identical.Multiple electric signal sample circuits 1011 are electrical connected and correspond with multiple PGA10211 respectively.It is more
A PGA10211 is electrical connected and corresponds with multiple ADC10212 respectively.
Tri- tunnel analog signals of computation chip Ke Jiang as shown in Figure 5 are carried out being converted to three railway digital signals and be handled,
Three road ADC are internally integrated, wherein V1P, V1N, V2P, V2N, V3P, V3N as shown in dashed box are defined as follows：
V1P：First via voltage or current signal input (just), V1N：First via voltage or current signal input
(negative)；V2P：Second road voltage or current signal input (just), V2N：Second road voltage or current signal input (negative)；
V3P：Third road voltage or current signal input (just), V3N：Third road voltage or current signal input (negative).
Specifically, the target simulation letter that the electric signal sample circuit 1011 that PGA10211 receptions are electrical connected with itself is sent
Number, the amplitude of target simulation signal is amplified, amplified analog signal is obtained and is sent to the ADC10212 being electrical connected with itself.
The amplified analog signal of PGA10211 that ADC10212 receptions are electrical connected with itself, and amplified analog signal is converted into number
Signal.
As shown in fig. 6, the analog signal of PGA10211 receiving ports V1P and port V1N inputs, PGA10211, which will be simulated, to be believed
It number is amplified, and be sent to ADC10212, after ADC10212 receives the analog signal, is translated into digital signal.
Wherein, the chip that computation chip 1021 uses be ATT7037 chips, on the chip, integrate 3 road PGA10211 and
3 road ADC10212, then correspondingly, electric signal sample circuit 1011 is 3 tunnels.3 road ADC10212 are the completely self-contained second order in 3 tunnels
The digital signal resolution ratio of sigma-delta ADC, sigma-delta ADC are higher, are widely used in fields such as electronic surveyings.It is exemplary
, the amplitude for the voltage signal of the 0-200mV of electric signal sample circuit 1011 connected with itself is amplified 4 times by PGA10211,
The voltage signal for making to be sent to the ADC10212 to connect with itself is 0-800mV, it is ensured that the multichannel when minimum signal inputs
The linearity of metering ammeter.ADC10212 receives the voltage signal of 0-800mV, and is converted to digital signal.
Wherein, the inside of computation chip 1021 may also include the circuits such as processor, liquid crystal display driving, power management,
It is connected with ADC10212, abundant measurement parameter is provided for multiple metering ammeter.
Further, multiple metering ammeter further includes display module 104, display module 104 and 102 electrical phase of metering module
Even.
The operation principle of display module 104 is, in order to directly read ammeter data, metering module on multiple metering ammeter
After multi-channel electric signal from signal acquisition module 101 is converted to multi-path digital signal by 102, which is carried out
Processing generates multiple ammeter datas, and is sent to display module 104.Display module 104 receives the multi-path digital signal, according to
The multi-path digital signal shows multiple ammeter datas, such as A families electricity consumption：50 degree, B families electricity consumption：42 degree and C families electricity consumption：
86 degree.
Wherein, display module 104 includes liquid crystal display, which is electrical connected with metering module 102.Due to
Liquid crystal display has many advantages, such as that display quality is high, picture effect is good and digital interface, therefore in order to export ammeter data,
The display screen that display module 104 uses is liquid crystal display.
Further, multiple metering ammeter further includes：Memory module 105 and key-press module 106.Memory module 105 and meter
Amount module 102 is electrical connected, and key-press module 106 is electrical connected with metering module 102.
The operation principle of memory module 105 is that memory module 105 stores ammeter configuration parameter, ammeter calibration parameter and electricity
List event journal (Sequence Of Event, SOE) data, ammeter configuration parameter include the ground of multiple metering ammeter
Location, baud rate and communications protocol etc..Parameter is configured including checking parameter etc. in ammeter calibration.Ammeter SOE data are electric system
The events such as switch, the protection act of middle generation are in the temporal logout of Millisecond.
The operation principle of key-press module 106 is that key-press module 106 receives key command and is sent to metering module 102.It presses
Key module 106 may be provided on display module 104, and the input instruction of key-press module 106 is utilized on display module 104 for user.
After user inputs key command by key-press module 106, which is sent to metering module 102 by key-press module 106,
After metering module 102 receives the key command, ammeter configuration parameter and ammeter calibration parameter are changed according to the key command, obtained
Modified ammeter configuration parameter and ammeter calibration parameter, as the first modification parameter and are sent to memory module 105, store mould
Block 105 receives the first modification parameter and is stored.Wherein, when metering module 102 receives user by key-press module 106
During the reading instruction of input, the first configuration parameter is read from memory module 105.
Further, multiple metering ammeter further includes system time module 107, system time module 107 and metering module
102 are electrical connected.
The operation principle of system time module 107 is that the chip that the system time module 107 uses can be real-time clock
(Real-Time Clock, RTC) chip, provides time signal for multiple metering ammeter and is sent to metering module 102.Metering
After module 102 receives the time signal, event is occurred according to the time signal and aforementioned described ammeter, generates multiple SOE
Data, and it is sent to communication module 103, display module 104 and memory module 105.Memory module 105 receives multiple SOE numbers
According to and stored.After communication module 103 receives multiple SOE data, multiple SOE data are sent to server, so that
Server receives and shows multiple SOE data.After display module 104 receives multiple SOE data, according to multiple SOE data
It is shown.Illustratively, multiple SOE data can be that the input of multiple switch amount or output switch parameter action event record data,
User can judge whether abnormal conditions according to the SOE data, so as to fulfill the real-time monitoring to electric system.
Wherein, during metering module 102 handles multi-path digital signal, protection act event occurs in electric system
When, metering module generation daily record, and the time signal that system time module 107 provides is combined, generation SOE data are sent to storage
Module 105.If metering module receives the reading instruction from communication module 103 or key-press module 106, metering module
102 obtain the SOE data, and the SOE data are sent to communication module 103 and display module 104 from memory module 105,
It is shown and is read.
Further, multiple metering ammeter further includes switching input module 108 and switching value output module 109, switch
Amount input module 18 is electrical connected with metering module 102, and metering module 102 is electrical connected with switching value output module 109.
The operation principle of switching input module 108 and switching value output module 109 is that switching input module 108 is
Multiple metering ammeter provides detection signal and is sent to metering module 102.After metering module 102 receives the detection signal, according to
The detection signal judges itself with the presence or absence of exception, and generates SOE data.Metering module 102 is when detecting the presence of abnormal, hair
Abnormal control signal is sent to switching value output module 109.After switching value output module 109 receives the abnormal control signal, according to
The abnormal control signal performs relay output operation, such as exports actuation of an alarm by relay.Wherein, SOE data can be such as
Communication module 103, display module 104 and memory module 105 are sent to described in preceding, also can carry out self-measuring mould as previously mentioned, receiving
The reading order of block 102, SOE data are sent to metering module 102.
Further, communication module 103 receives the control instruction from server, and control instruction is sent to metering mould
Block 102.After metering module 102 receives the control instruction, ammeter configuration parameter is changed according to the control instruction and ammeter calibration is joined
Number obtains modified ammeter configuration parameter and ammeter calibration parameter, as the second modification parameter and is sent to memory module 105
With communication module 103.After memory module 105 receives the second modification parameter, which is stored.Communicate mould
Block 103 receives the second modification parameter and is sent to server, so that server obtains the second modification parameter.Communication module 103
Using RS485 communication interfaces.Wherein, when metering module 102 receives the reading instruction of server by communication module 103,
Second modification parameter is obtained, and be read out from memory module 105 according to reading instruction.
Optionally, multiple electric signal sample circuits 1011 include first via electric signal sample circuit, the second road electric signal is adopted
Sample circuit and third road electric signal sample circuit.Multiple PGA10121 include first via PGA, the second road PGA and third road PGA.
Multiple ADC10122 include first via ADC, the second road ADC and third road ADC.
First via electric signal sample circuit is electrical connected with first via PGA, for acquiring the first electric signal from the first power grid,
And the first electric signal is sent to first via PGA, the first electric signal is the first analog signal.First via PGA and first via ADC electricity
Property be connected, for receiving the first analog signal, the first analog signal is amplified, and amplified first analog signal is sent to
First via ADC.First via ADC for receiving amplified first analog signal, and simulation No. the amplified first is converted to
First digital signal.
Second road electric signal sample circuit is electrical connected with the second road PGA, for acquiring the second electric signal from the second power grid,
And the second electric signal is sent to the second road PGA, the second electric signal is the second analog signal.Second road PGA and the second road ADC electricity
Property be connected, for receiving the second analog signal, the second analog signal is amplified, and amplified second analog signal is sent to
Second road ADC.Second road ADC for receiving amplified second analog signal, and simulation No. the amplified second is converted to
Second digital signal.
Third road electric signal sample circuit is electrical connected with third road PGA, for acquiring third electric signal from third power grid,
And third electric signal is sent to third road PGA, third electric signal is third analog signal.Third road PGA and third road ADC electricity
Property is connected, and for receiving third analog signal, third analog signal is amplified, and amplified third analog signal is sent to
Third road ADC.Third road ADC for receiving amplified third analog signal, and the simulation number of amplified third is converted to
Third digital signal.
In the present embodiment, multi-channel electric signal being acquired by signal acquisition module, metering module converts the multi-channel electric signal,
And multiple ammeter datas are generated according to the multi-path digital signal and are sent to communication module, then multiple ammeter numbers are received by communication module
According to and be sent to server, and server is caused to receive and show multiple ammeter datas, the hardware circuit device needed in the program
Part is few, and can improve the accuracy of multiple electric energy detections, reduce production cost and convenient for assembling and debugging.Also, the electricity
Signal sample circuit includes current mode voltage transformer, it can be achieved that the isolation of multiple metering ammeter and power grid；Further include wave filter,
The high-frequency interferencing signal in collected analog signal can be eliminated.The computation chip further includes PGA, can realize analog signal
Amplification, increase measure minimum signal when the linearity；Including multi-channel A/D C, multichannel analog signals can be converted to multichannel
Digital signal.
Referring to Fig. 7, Fig. 7 is the electric signal sampling electricity in the multiple metering ammeter that the 3rd embodiment of the utility model provides
The circuit diagram on road.The multiple metering ammeter provided with the first and second embodiments in the utility model shown in Fig. 1 to Fig. 6
Unlike, as shown in fig. 7, in the present embodiment, the operation principle of electric signal sample circuit is：
1011 collected electric signal of electric signal sample circuit is current signal, then electric signal sample circuit 1011 includes electricity
Flow pattern mutual inductor 10116, sampling resistor 10114 and wave filter 10115.As shown in fig. 7, current mode voltage transformer 10116 with
Sampling resistor 10114 is in parallel, and sampling resistor 10114 is electrically connected with wave filter 10115, wave filter 10115 and computation chip
1021 series connection.
The operation principle of current mode mutual inductor 10116 is that current mode mutual inductor 10116 receives mould by port IA+ and IA-
After intending signal, which by electromagnetic induction is converted, converting analogue signals is obtained and is sent to sampling resistor
10114, the amplitude of the converting analogue signals is less than the amplitude of analog signal.In practical applications, by passing through current mode mutual inductance
1011 collected current signal of electric signal sample circuit can be limited in 5A (units by the selection of the model of device 10116：Peace
Training) or 1A, the current signal directly then can be converted to by 0-2mA by the current mode mutual inductor 10116 of selection.It is exemplary
, current mode mutual inductor 10116 includes first winding and secondary windings, and first winding accesses power network current, secondary windings access
Multiple metering ammeter when accessing electric signal in first winding, due to electromagnetic induction, induces electromotive force in secondary windings,
If secondary windings is powered, electric signal can be generated, therefore, which is not present electrically with being adapted between analog signal
Connection so as to which multiple metering ammeter be isolated with power grid, and causes multiple metering ammeter to have good anti lightning
Interference performance.
The operation principle of sampling resistor 10114 is that sampling resistor 10114 receives the converting analogue signals, and this is converted
Analog signal is converted, and is obtained transformation analog signal and is sent to wave filter 10115, which believes for voltage
Number, which is current signal.Illustratively, the resistance value of sampling resistor 10114 is 100 Ω, by the electric current of 0-2mA
Signal is transformed to the voltage signal of 0-200mV.
The operation principle of wave filter 10115 is that after wave filter 10115 receives the transformation analog signal, which is simulated
High-frequency interferencing signal in signal is filtered out, and obtains target simulation signal and pass through port V1P and V1N being sent to computation chip
1021.The frequency values of the high-frequency signal are more than the frequency values of the target simulation signal.Illustratively, wave filter 10115 is low pass
Wave filter, including filter resistance and filter capacitor, the resistance value of the filter resistance is 1200 Ω, and the capacitance of the filter capacitor is
33nF (units：Nanofarad), which connects with sampling resistor 10114, and the filter capacitor is in parallel with sampling resistor 10114,
The filter resistance and filter capacitor form wave filter 10115, eliminate signal interference.
It should be understood that multiple electric signal sample circuits 1011 include multiple mutual inductors.In practical applications, multiple mutual inductances
Device is current mode voltage transformer 10113 or is current mode mutual inductor 10116, but multiple current mode voltage transformers
10113 is identical with the shape and size of multiple current mode mutual inductors 10116, i.e., the distance between pin is identical, can be connected on identical
Interface on, with realize share.
In the present embodiment, multi-channel electric signal being acquired by signal acquisition module, metering module converts the multi-channel electric signal,
And multiple ammeter datas are generated according to the multi-path digital signal and are sent to communication module, then multiple ammeter numbers are received by communication module
According to and be sent to server, and server is caused to receive and show multiple ammeter datas, the hardware circuit device needed in the program
Part is few, and can improve the accuracy of multiple electric energy detections, reduce production cost and convenient for assembling and debugging.Also, the electricity
Signal sample circuit includes current mode mutual inductor, it can be achieved that the isolation of multiple metering ammeter and power grid；The current mode mutual inductor with
The distance between the aforementioned pin of current mode voltage transformer used is identical, can be connected on identical interface, is shared with realizing；
Wave filter is further included, the high-frequency interferencing signal in collected analog signal can be eliminated.The computation chip further includes PGA, can
To realize the amplification of analog signal, linearity when measuring minimum signal is increased；It, can be by multi-channel analog including multi-channel A/D C
Signal is converted to multi-path digital signal.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiments.
It is to a kind of description of multiple metering ammeter provided by the utility model, for those skilled in the art above
Member, based on the idea of the embodiment of the present invention, there will be changes in specific embodiments and applications, to sum up,
The content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. a kind of multiple metering ammeter, which is characterized in that the multiple metering ammeter includes：
Signal acquisition module, metering module and communication module；
The signal acquisition module is electrical connected with the metering module, for being acquired from the multiple power grids being electrical connected with itself
Multi-channel electric signal, and collected multi-channel electric signal is sent to the metering module, multiple power grids respectively with multichannel institute
Electric signal one-to-one correspondence is stated, the multi-channel electric signal is multichannel analog signals；
The metering module is electrical connected with the communication module, for receiving the multichannel analog signals, and by the multichannel
Analog signal is converted to multi-path digital signal, and generates multiple ammeter datas according to the multi-path digital signal and be sent to described lead to
Interrogate module；
The communication module, for receiving the multiple ammeter data and being sent to server, so that the server receives simultaneously
Show the multiple ammeter data.
2. multiple metering ammeter as described in claim 1, which is characterized in that the signal acquisition module includes multiple electric signals
Sample circuit, the metering module include computation chip, and multiple electric signal sample circuits are electrical with the computation chip
It is connected；
The electric signal sample circuit, for acquiring electric signal from the power grid that is electrical connected with itself, and by collected telecommunications
The computation chip number is sent to, the electric signal is analog signal；
The analog signal for receiving the analog signal, and is converted into the digital signal by the computation chip, according to
The digital signal generation ammeter data is sent to the communication module.
3. multiple metering ammeter as claimed in claim 2, which is characterized in that the electric signal sample circuit includes plug-in unit electricity
Resistance, current mode voltage transformer, sampling resistor and wave filter；
The plug-in unit resistance is electrical connected with the current mode voltage transformer, for converting the analog signal, is adapted to
Analog signal is simultaneously sent to the current mode voltage transformer, and the analog signal that is adapted to is current signal, the analog signal
For voltage signal；
The current mode voltage transformer is electrical connected with the sampling resistor, for the adaptation analog signal to be passed through electromagnetism
Sensing is converted, and is obtained converting analogue signals and is sent to the sampling resistor, the converting analogue signals are adapted to described
The metering module is isolated with power grid there is no being electrically connected for analog signal；
The sampling resistor is electrical connected with the wave filter, for converting the converting analogue signals, obtains transformation simulation letter
Number and be sent to the wave filter, the transformation analog signal is voltage signal, and the converting analogue signals are current signal；
The wave filter is electrical connected with the computation chip, for filtering out the High-frequency Interference letter in the transformation analog signal
Number, it obtains target simulation signal and is sent to the computation chip, the frequency values of the high-frequency interferencing signal are more than the target
The frequency values of analog signal.
4. multiple metering ammeter as claimed in claim 2, which is characterized in that it is mutual that the electric signal sample circuit includes current mode
Sensor, sampling resistor and wave filter；
The current mode mutual inductor is electrical connected with the sampling resistor, for the analog signal to be carried out by electromagnetic induction
Conversion, obtains converting analogue signals and is sent to the sampling resistor, and the absolute value of the converting analogue signals is less than the mould
Intend the absolute value of signal, the converting analogue signals are not present with the analog signal and are electrically connected, by the metering module
It is isolated with power grid；
The sampling resistor is electrical connected with the wave filter, for converting the converting analogue signals, obtains transformation simulation letter
Number and be sent to the wave filter, the transformation analog signal is voltage signal, and the converting analogue signals are current signal；
For filtering out the high-frequency interferencing signal in the transformation analog signal, it is concurrent to obtain target simulation signal for the wave filter
The computation chip is given, the frequency values of the high-frequency interferencing signal are more than the frequency values of the target simulation signal.
5. the multiple metering ammeter as described in any one of claim 3 or 4, which is characterized in that the computation chip includes more
A programmable gain amplifier and multiple analog-digital converters, the quantity of the programmable gain amplifier, the analog-digital converter
Quantity and the electric signal sample circuit quantity it is identical；
Multiple electric signal sample circuits are electrical connected and correspond with multiple programmable gain amplifiers respectively；
Multiple programmable gain amplifiers are electrical connected and correspond with multiple analog-digital converters respectively；
The programmable gain amplifier, for receiving the target that the electric signal sample circuit being electrical connected with itself is sent
The amplitude of the target simulation signal is amplified, obtains amplified analog signal and be sent to be electrical connected with itself by analog signal
The analog-digital converter；
The analog-digital converter simulates letter for receiving the amplification for the programmable gain amplifier being electrical connected with itself
Number, and the amplified analog signal is converted into digital signal.
6. multiple metering ammeter as claimed in claim 5, which is characterized in that the multiple metering ammeter further includes display mould
Block, the display module are electrical connected with the metering module, for receiving and showing multiple electricity from the metering module
Table data；
The display module includes liquid crystal display, and the liquid crystal display is electrical connected with the metering module.
7. multiple metering ammeter as claimed in claim 6, which is characterized in that the multiple metering ammeter further includes：Store mould
Block and key-press module；
The memory module is electrical connected with the metering module, for storing ammeter configuration parameter, ammeter calibration parameter and electricity
List event sequential recording of data；
The key-press module is electrical connected with the metering module, for receiving key command and being sent to the metering module；
The metering module is additionally operable to receive the key command, and change the ammeter configuration ginseng according to the key command
Number and the ammeter calibration parameter obtain modified ammeter configuration parameter and ammeter calibration parameter, as the first modification parameter
And it is sent to the memory module；
The memory module is additionally operable to receive the first modification parameter and be stored；
The metering module is additionally operable to read the first modification parameter from the memory module.
8. multiple metering ammeter as claimed in claim 7, which is characterized in that the multiple metering ammeter further includes system time
Module；
System time module is electrical connected with the metering module, for providing time signal and being sent to the metering module；
The metering module is additionally operable to according to the time signal and ammeter event, generates multiple sequence of events recording data, and
It is sent to the memory module, the communication module and the display module；
The memory module is additionally operable to receive multiple sequence of events recording data and be stored；
The communication module is additionally operable to receive multiple sequence of events recording Data Concurrents and gives the server, so that institute
Server is stated to receive and show the multiple sequence of events recording data；
The display module is additionally operable to receive and shows multiple logout alphabetic datas.
9. multiple metering ammeter as claimed in claim 8, which is characterized in that it is defeated that the multiple metering ammeter further includes switching value
Enter module and switching value output module；
The switching input module is electrical connected with the metering module, for providing detection signal and being sent to the metering
Module；
The metering module is additionally operable to according to the detection signal detection itself with the presence or absence of abnormal；
The metering module is electrical connected with the switching value output module, is additionally operable to when detecting the presence of abnormal, sends different
Signal is often controlled to the switching value output module；
The switching value output module, for performing output operation according to the abnormal control signal.
10. multiple metering ammeter as claimed in claim 9, which is characterized in that
The communication module is additionally operable to receive the control instruction from server, and the control instruction is sent to the meter
Measure module；
The metering module is additionally operable to change the ammeter configuration parameter and ammeter calibration ginseng according to the control instruction
Number obtains modified ammeter configuration parameter and ammeter calibration parameter, as the second modification parameter and is sent to the storage mould
Block and the communication module；
The memory module is additionally operable to receive the second modification parameter and be stored；
The communication module is additionally operable to receive the second modification parameter and is sent to the server, so that the server
Obtain the second modification parameter；
The metering module is additionally operable to read the second modification parameter；
The communication module uses RS485 communication interfaces, and the RS485 communication interfaces are electrical connected with the metering module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721670171.0U CN207502603U (en) | 2017-12-05 | 2017-12-05 | A kind of multiple metering ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721670171.0U CN207502603U (en) | 2017-12-05 | 2017-12-05 | A kind of multiple metering ammeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207502603U true CN207502603U (en) | 2018-06-15 |
Family
ID=62508740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721670171.0U Active CN207502603U (en) | 2017-12-05 | 2017-12-05 | A kind of multiple metering ammeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207502603U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562791A (en) * | 2018-07-14 | 2018-09-21 | 苏州溥秋智能科技有限公司 | A kind of data acquisition device |
-
2017
- 2017-12-05 CN CN201721670171.0U patent/CN207502603U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562791A (en) * | 2018-07-14 | 2018-09-21 | 苏州溥秋智能科技有限公司 | A kind of data acquisition device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201742158U (en) | Online monitoring device for power transformer | |
| CN203520081U (en) | Time-based synchronous multichannel data acquisition instrument | |
| WO2015062104A1 (en) | Smart power utilization communications product testing system | |
| CN201845051U (en) | Three-phase intelligent electric energy meter | |
| CN111965447B (en) | Hardware configurable analog signal comprehensive test system | |
| CN103852637B (en) | Intelligent electric meter with fundamental wave metering function and measurement method thereof | |
| CN108732527A (en) | Quality of transformer performance on-line monitoring system based on wide area synchro measure | |
| CN101718820A (en) | Power distribution transformer monitoring terminal and method for calculating current complex power precision thereof | |
| CN110441593A (en) | A kind of Rogowski coil current signal acquisition system and acquisition method | |
| CN206041987U (en) | Power line interfering signal draw with synchronous playback device | |
| CN207181522U (en) | Novel DC electric energy meter | |
| CN207502603U (en) | A kind of multiple metering ammeter | |
| CN110470963A (en) | A kind of high voltage capacitive apparatus insulated performance on-line monitoring device based on DSP | |
| CN206292324U (en) | A kind of frequency-characteristic measuring-testing instrument | |
| CN203502505U (en) | electric energy quality monitoring terminal device based on WIFI | |
| CN203688651U (en) | Current sampling and protecting circuit for electronic current transformer | |
| CN211123155U (en) | Automatic closing circuit breaker detection device with residual current protection function | |
| CN202382873U (en) | Intelligent temperature transmitter | |
| CN103986231A (en) | Networked intelligent transformer substation metering system | |
| CN110579732A (en) | System for testing load recognition function | |
| CN209417268U (en) | A kind of parameter testing diagnostic machine of the pulse power | |
| CN201589810U (en) | Single-channel time-multiplexed sampling circuit | |
| CN204008832U (en) | A kind of sampling A/D chip and the sample circuit of built-in AD to same passage of measuring | |
| CN203798903U (en) | Intelligent electric energy meter | |
| CN107422182A (en) | Direct current energy meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |