CN205229297U - Use electric energy meter of card agate sampling resistor - Google Patents
Use electric energy meter of card agate sampling resistor Download PDFInfo
- Publication number
- CN205229297U CN205229297U CN201521095782.8U CN201521095782U CN205229297U CN 205229297 U CN205229297 U CN 205229297U CN 201521095782 U CN201521095782 U CN 201521095782U CN 205229297 U CN205229297 U CN 205229297U
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- electric energy
- energy meter
- sampling resistor
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Abstract
The utility model discloses an use electric energy meter of card agate sampling resistor, including processor module, signal acquisition conditioning module, power module, demonstration button module and communication circuit, processor module connects liquid crystal display module, button module and communication circuit respectively, processor module still connects signal acquisition conditioning module through the measurement port. The beneficial effects of the utility model are that: 1, because adopt card agate material, its material is nickel -chromium improvement type precision electrical resistance alloy, has the resistivity height, resistance temperature coefficient low grade characteristics are compared in traditional copper -manganese sampling resistor, have good heat stability, are applied to the current sampling circuit of electric energy meter, can satisfy the current sample function of product, 2, card agate material producing's sampling resistor, its is small, is applied to the electric energy meter design, can be under the prerequisite that satisfies many parameter measurement demand, saved sampling circuit's space, the size that can reduce the electric energy meter greatly.
Description
Technical field
The utility model relates to a kind of power instrument detection field, specifically a kind of electric energy meter using card agate sampling resistor.
Background technology
In existing similar technique invention, generally pass through microprocessor (MCU) in conjunction with computation chip as main control module, peripheral module such as employing signal acquisition circuit, communicating circuit etc., realizes detecting the electrical energy parameter of single-phase electricity.Wherein the electric energy meter of wide range generally all adopts the access way of mutual-inductor type, coordinates the current transformer of primary side, thus realizes the current sample process operation of measurement environment.The mutual inductor access way used in such invention carries out current sample, and the space that its mutual inductor takies is comparatively large, and reducing of unfavorable electricity consumption table size, does not possess advantage in guide tracked electric energy meter product, therefore hinders it and uses popularization, need to be improved.
Utility model content
The purpose of this utility model is to provide a kind of electric energy meter using card agate sampling resistor, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
Use an electric energy meter for card agate sampling resistor, comprise processor module, signal collection modulation module, power module, display button module and communicating circuit, described processor module connects LCD MODULE, key-press module and communicating circuit respectively; Processor module is also by metering port connection signal collection modulation module, signal collection modulation module also connects mu balanced circuit, card agate sampling resistor sampling module and resistance pressure-dividing network respectively, communicating circuit also connects DC-DC module, DC-DC module also connects capacitance-resistance voltage reduction circuit, capacitance-resistance voltage reduction circuit also connects measuring circuit, and measuring circuit also distinguishes Connection Card agate sampling resistor sampling module and resistance pressure-dividing network.
As preferred version of the present utility model: the described resistance showing to adopt card agate material to make is as the sample resistance of current signal.
Compared with prior art, the beneficial effects of the utility model are: 1, owing to adopting card agate material, its material is nickel chromium triangle modified form precision electrical resistance alloy, there is resistivity high, the features such as temperature-coefficient of electrical resistance is low, compared to traditional copper-manganese sample resistance, have good thermal stability, be applied to the current sampling circuit of electric energy meter, the current sample function of product can be met; 2, the sample resistance of card agate material making, its volume is little, is applied in electric energy meter design, under the prerequisite meeting measuring multiple parameters demand, can saves the space of sample circuit, greatly can reduce the size of electric energy meter.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the electric energy meter using card agate sampling resistor;
Fig. 2 is the circuit diagram of signal collection modulation module.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1,2, a kind of electric energy meter using card agate sampling resistor, comprise processor module, signal collection modulation module, power module, display button module and communicating circuit, described processor module connects LCD MODULE, key-press module and communicating circuit respectively; Processor module is also by metering port connection signal collection modulation module, signal collection modulation module also connects mu balanced circuit, card agate sampling resistor sampling module and resistance pressure-dividing network respectively, communicating circuit also connects DC-DC module, DC-DC module also connects capacitance-resistance voltage reduction circuit, capacitance-resistance voltage reduction circuit also connects measuring circuit, and measuring circuit also distinguishes Connection Card agate sampling resistor sampling module and resistance pressure-dividing network.
Described processor module is connected with each module by GPIO mouth.
Principle of work of the present utility model is: this programme is in the mode of resistance-capacitance depressurization as total electric power system of whole electric energy meter, realize independent isolation voltage by DC-DC module to export, aim at communication module to power, take processor module as core, connect the circuit such as display button module, communication module and signal condition successively.
Signal collection modulation module adopts integrated transporting discharging IC to combine peripheral resistance, capacitor element forms signal conditioning circuit, the process such as the current signal for current sampling resistor collection carries out amplifying, phase compensation, use resistance pressure-dividing network carries out the voltage sample in measuring circuit simultaneously, after the filtering, the process such as anti-interference of signal, deliver to the metering port of processor, metering section in processor completes the analog-to-digital conversion process to voltage, current parameters, by the computational analysis of the electrical energy parameters such as corresponding algorithm realization power, frequency, requirement, power consumption.
Processor module in system is connected by circuit such as GPIO mouth and display button module, communication modules, being sent to display module, being presented at liquid crystal from realization by measurement parameter by measuring the parameter obtained; Be connected with communication module by UART interface, adopt RS485 communication bus to realize the communication function of electric energy meter.Simultaneous processor module is also be connected with key-press module by I/O port, thus obtains the state of button, carries out identifying processing to actuation of keys, and then perform corresponding operation, realization arranges ammeter parameter and the functions such as measurement data are checked in page turning.
The utility model adopts card agate sample resistance sampled current value, adopt resistance pressure-dividing network sample voltage value, current sampling signal is through differential amplification, faint current signal is suitably amplified, then impedance isolation is carried out by follower, coordinate electric capacity to realize high-pass filtering and phase compensation simultaneously, finally the voltage signal that the current signal after conditioning and dividing potential drop obtain is delivered to respectively the measurement channel of processor.Power supply input power taking from measuring circuit of system, through by after capacitance-resistance voltage reduction circuit, by the voltage of positive half-wave by powering for processor and modulate circuit after mu balanced circuit; The voltage of negative half-wave is obtained a road isolation and amplifier voltage by DC-DC module, specially for communication module is powered.Processor module connects liquid crystal driver module and keystroke handling circuit by GPIO mouth, realizes the control of liquid crystal display and the action recognition of key-press input, completes the operation such as the setting of ammeter parameter and the display of measurement parameter.Processor module is connected with communication module by UART interface, realizes the sending function of measurement parameter.
Claims (2)
1. one kind uses the electric energy meter of card agate sampling resistor, comprise processor module, signal collection modulation module, power module, display button module and communicating circuit, it is characterized in that, described processor module connects LCD MODULE, key-press module and communicating circuit respectively; Processor module is also by metering port connection signal collection modulation module, signal collection modulation module also connects mu balanced circuit, card agate sampling resistor sampling module and resistance pressure-dividing network respectively, communicating circuit also connects DC-DC module, DC-DC module also connects capacitance-resistance voltage reduction circuit, capacitance-resistance voltage reduction circuit also connects measuring circuit, and measuring circuit also distinguishes Connection Card agate sampling resistor sampling module and resistance pressure-dividing network.
2. according to a kind of electric energy meter using card agate sampling resistor according to claim 1, it is characterized in that, the resistance that described electric energy meter adopts card agate material to make is as the sample resistance of current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521095782.8U CN205229297U (en) | 2015-12-24 | 2015-12-24 | Use electric energy meter of card agate sampling resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521095782.8U CN205229297U (en) | 2015-12-24 | 2015-12-24 | Use electric energy meter of card agate sampling resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205229297U true CN205229297U (en) | 2016-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521095782.8U Expired - Fee Related CN205229297U (en) | 2015-12-24 | 2015-12-24 | Use electric energy meter of card agate sampling resistor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205229297U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425740A (en) * | 2017-09-22 | 2017-12-01 | 武汉盛帆电子股份有限公司 | A kind of high pressure apparent source and high pressure gauge |
-
2015
- 2015-12-24 CN CN201521095782.8U patent/CN205229297U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425740A (en) * | 2017-09-22 | 2017-12-01 | 武汉盛帆电子股份有限公司 | A kind of high pressure apparent source and high pressure gauge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 314000 Building No. 4, 1369 South City Road, Jiaxing, Zhejiang, 201, Jiaxing Patentee after: ZHEJIANG EASTRON ELECTRONIC CO.,LTD. Address before: 314000 Building No. 4, 1369 South City Road, Jiaxing, Zhejiang, 201, Jiaxing Patentee before: JIAXING EASTRON ELECTRONIC INSTRUMENTS CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 314000 building 4, 1369 South Chengdu Road, Jiaxing, Jiaxing, Zhejiang 201 Patentee after: Zhejiang Donghong Electronics Co.,Ltd. Address before: 314000 building 4, 1369 South Chengdu Road, Jiaxing, Jiaxing, Zhejiang 201 Patentee before: ZHEJIANG EASTRON ELECTRONIC Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20211224 |