CN208723533U - A kind of digital electric current relay - Google Patents
A kind of digital electric current relay Download PDFInfo
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- CN208723533U CN208723533U CN201820840165.3U CN201820840165U CN208723533U CN 208723533 U CN208723533 U CN 208723533U CN 201820840165 U CN201820840165 U CN 201820840165U CN 208723533 U CN208723533 U CN 208723533U
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- digital electric
- current relay
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Abstract
The utility model discloses a kind of digital electric current relay, AD sample circuit, input terminal including AC power source, the biasing circuit connected to power supply, input terminal and bigoted circuit connection are separately connected the microcontroller of power supply and AD sample circuit, set on the actuating of relay indicator light of microcontroller output；Microcontroller is connect with keyboard and OLED screen；The input terminal of not circuit is separately connected microcontroller control signals pin and output signal pin；AD sampling module includes filtered bias circuit and ADC conversion circuit.The design strong antijamming capability, when handling data, only current continuous several times current effective value is greater than setting valve, just thinks that detecting electric current is greater than setting valve, the processing of return value is also similarly, so as to effectively avoid instantaneous interference.The calculating of current effective value is calculated, precision is high, and perturbation is small before this by sampled data after extreme mean and sliding average processing using Fourier algorithm.
Description
Technical field
The utility model relates to electric equipment protection fields, relate in particular to a kind of digital electric current relay.
Background technique
Electric current relay is the situation of change of electric current in detection circuit or major electrical equipment component, when electric current is more than (or being lower than)
When a certain setting valve, relay control and protective effect are completed in the actuating of relay.
Electric current relay common at present is mainly electromagnetic type electric current relay and static type electric current relay.Electromagnetic type after
Electric appliance is generally made of iron core, coil, armature, contact reed etc..It is to obtain electric attraction iron core by coil to be attracted electric shock, circuit
Conducting；Conversely, coil losing electricity release iron core disconnects electric shock, circuit is disconnected.Static type electric current relay, the electric current that will be sampled
It is converted into voltage through isolation rectification filtering, then compared with adjusting voltage, thus whether driving output relay to output.
Existing electromagnetic type electric current relay is controlled using mechanical system, and error is big, especially in electric current critical point,
It is easy to cause jitter phenomenon.Although the problem of static type electric current relay overcomes electromagnetic type using integrated circuit, it is adjusted
Value is adjusted using toggle switch, cannot be continuously arranged, meanwhile, return value is not settable, and does not have display function, Bu Nengxian
Show real-time current value.
Utility model content
Goal of the invention: the purpose of the utility model is to provide one kind to have friendly user's interface, and setting valve and return value are equal
Settable, reliable in action is stablized, anti-interference strong, small in size digital electric current relay.
Technical solution: to achieve the above object, a kind of digital electric current relay, including AC power source, connect to power supply
Biasing circuit, input terminal and bigoted circuit connection AD sample circuit, input terminal be separately connected power supply and AD sample circuit
Microcontroller, the actuating of relay indicator light set on microcontroller output；
The microcontroller is connect with keyboard and OLED screen；The input terminal of the not circuit is separately connected microcontroller control
Signal pin and output signal pin processed；The AD sampling module includes filtered bias circuit and ADC conversion circuit.
Filtered bias circuit is to be converted into small electricity for after the isolation coupling filtering of the electric current inputted in circuit progress mutual inductor
Flow, will exchange low current integral raising through biasing circuit is positive value.Filtered bias circuit is Order RC filter circuit, realization pair
Exchange small voltage signal denoising, the signal processing for follower.
Further, the ADC conversion circuit includes the follower connecting with filtered bias circuit output end, follower
Output end is connect with microcontroller.
Further, follower includes the operational amplifier of resistance R1A and model LM258D.
Further, the microcontroller is STM32F429 chip, the follower output end connection microcontroller
ADC pin；I/O mouth on microcontroller is connected with keyboard, is integrated with LCD controller on microcontroller, and 18 of LCD controller
Totally 28 lines are connect by 54 pin wire casings on pad with STM32F429 for RGB three primary colours line and control signal wire etc..
OLED screen is used for the virtual value of 3 road electric current of real-time display.Current setting can be set by button operation, return
Value, actuating of relay delay time, quick-break electric current.The modification operation realized by button operation, it is necessary to carry out password authentification
Afterwards, it can come into force.Current setting, return value, actuating of relay delay time, quick-break electricity can be set by button operation
Stream.The modification operation realized by button operation, it is necessary to after carrying out password authentification, can come into force.
Keyboard includes for two-way voltage setting valve and return value, two-way frequency setting value and return value, phase angle difference to be arranged
Four keys of setting valve and return value, voltage difference setting valve and return value, difference on the frequency setting valve and return value.1 × 4 keyboard by
A button switch S and pull-up resistor composition, button switch one end ground connection, the other end access microcontroller pin through pull-up resistor.
It will can be connected with microcontroller in 54 pin wire casings on the winding displacement insertion pad of LCD screen, SXOUPTYX boost chip is LCD
Screen provides backlight.
After powering on, carrying out a series of initialization includes power-on self-test, and reading users such as setting valve in memory can be with
The operation such as parameter of setting, initialization operation enter main work flow after the completion.
After external AC current enters this product by input terminal, handled by front-end processing circuit after being sampled with AD,
Microcontroller carries out extreme value filtering to the sampled data that AD is sent and sliding average is handled, then is calculated by 36 Fourier algorithms
Obtain accurate alternating current virtual value.Advanced scanning frequency power-off stream judgement, it is micro- if the current value detected reaches quick-break electric current
Output node movement is immediately controlled in controller, while quick-break alternator indicator and actuating of relay instruction on friendly user's interface
Lamp is lighted, and user's electric current is reminded to reach quick-break value.
If fast tripping protection does not occur, and current continuous several times current effective value is greater than setting valve, then is judged as detection electric current
Greater than setting valve, then the action delay time is waited to arrive, then output node acts, and similarly, the relay on friendly user's interface is dynamic
It is lighted as indicator light；If current continuous several times current effective value is less than return value, then it is assumed that detection electric current restores normal, output section
Point returns immediately, and actuating of relay indicator light extinguishes.
The utility model has the advantages that the design strong antijamming capability.When handling data, only current continuous several times current effective value is big
In setting valve, just think that detecting electric current is greater than setting valve, the processing of return value is also similarly, so as to effectively avoid instantaneously doing
It disturbs.The calculating of current effective value is before this by sampled data after extreme mean and sliding average processing, using Fourier algorithm
It is calculated, precision is high, and perturbation is small.The design has detection quick-break function of current, and delay time can be adjusted, and facilitates user couple
The control of relay actuation time.
Detailed description of the invention
Fig. 1 is the system framework schematic diagram of the utility model；
Fig. 2 is the circuit diagram of filtered bias module；
Fig. 3 is Tthe utility model system process flow diagram.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.
As shown in Figure 1 to Figure 3, a kind of digital electric current relay, including AC power source, the biased electrical connected to power supply
Road, input terminal and bigoted circuit connection AD sample circuit, input terminal be separately connected the microcontroller of power supply and AD sample circuit,
Set on the actuating of relay indicator light of microcontroller output；Microcontroller is connect with keyboard and OLED screen；Not circuit it is defeated
Enter end and is separately connected microcontroller control signals pin and output signal pin；AD sampling module include filtered bias circuit and
ADC conversion circuit.
Filtered bias circuit is to be converted into small electricity for after the isolation coupling filtering of the electric current inputted in circuit progress mutual inductor
Flow, will exchange low current integral raising through biasing circuit is positive value.Filtered bias circuit is Order RC filter circuit, realization pair
Exchange small voltage signal denoising, the signal processing for follower.
ADC conversion circuit includes the follower connecting with filtered bias circuit output end, the output end and micro-control of follower
Device connection processed.Follower includes the operational amplifier of resistance R1A and model LM258D.Microcontroller is STM32F429 core
Piece, follower output end connect the ADC pin of microcontroller；I/O mouth on microcontroller is connected with keyboard, collects on microcontroller
At there is LCD controller, totally 28 lines pass through on pad for 18 RGB three primary colours lines of LCD controller and control signal wire etc.
54 pin wire casings are connect with STM32F429.
OLED screen is used for the virtual value of 3 road electric current of real-time display.Current setting can be set by button operation, return
Value, actuating of relay delay time, quick-break electric current.The modification operation realized by button operation, it is necessary to carry out password authentification
Afterwards, it can come into force.Current setting, return value, actuating of relay delay time, quick-break electricity can be set by button operation
Stream.The modification operation realized by button operation, it is necessary to after carrying out password authentification, can come into force.
Keyboard includes for two-way voltage setting valve and return value, two-way frequency setting value and return value, phase angle difference to be arranged
Four keys of setting valve and return value, voltage difference setting valve and return value, difference on the frequency setting valve and return value.1 × 4 keyboard by
A button switch S and pull-up resistor composition, button switch one end ground connection, the other end access microcontroller pin through pull-up resistor.
It will can be connected with microcontroller in 54 pin wire casings on the winding displacement insertion pad of LCD screen, SXOUPTYX boost chip is LCD
Screen provides backlight.
After external AC current enters this product by input terminal, handled by front-end processing circuit after being sampled with AD,
Microcontroller carries out extreme value filtering to the sampled data that AD is sent and sliding average is handled, then is calculated by 36 Fourier algorithms
Obtain accurate alternating current virtual value.Advanced scanning frequency power-off stream judgement, it is micro- if the current value detected reaches quick-break electric current
Output node movement is immediately controlled in controller, while quick-break alternator indicator and actuating of relay instruction on friendly user's interface
Lamp is lighted, and user's electric current is reminded to reach quick-break value.
After powering on, carrying out a series of initialization includes power-on self-test, and reading users such as setting valve in memory can be with
The operation such as parameter of setting, initialization operation enter main work flow after the completion.
If fast tripping protection does not occur, and current continuous several times current effective value is greater than setting valve, then is judged as detection electric current
Greater than setting valve, then the action delay time is waited to arrive, then output node acts, and similarly, the relay on friendly user's interface is dynamic
It is lighted as indicator light；If current continuous several times current effective value is less than return value, then it is assumed that detection electric current restores normal, output section
Point returns immediately, and actuating of relay indicator light extinguishes.
Claims (6)
1. a kind of digital electric current relay, it is characterised in that: including AC power source, the biasing circuit connected to power supply, input
It holds and is separately connected the microcontroller of power supply and AD sample circuit, set on micro- with AD sample circuit, the input terminal of bigoted circuit connection
Actuating of relay indicator light, the not circuit of controller output end；
The microcontroller is connect with keyboard and OLED screen；The input terminal of the not circuit is separately connected microcontroller control letter
Number pin and output signal pin；The AD sample circuit includes filtered bias circuit and ADC conversion circuit.
2. a kind of digital electric current relay according to claim 1, it is characterised in that: filtered bias circuit is Order RC
Filter circuit.
3. a kind of digital electric current relay according to claim 1, it is characterised in that: the ADC conversion circuit includes
The output end of the follower connecting with filtered bias circuit output end, follower is connect with microcontroller.
4. a kind of digital electric current relay according to claim 3, it is characterised in that: follower include resistance R1A, with
And the operational amplifier of model LM258D.
5. a kind of digital electric current relay according to claim 4, it is characterised in that: the microcontroller is
STM32F429 chip, the ADC pin of the follower output end connection microcontroller；LCD control is integrated on microcontroller
Device.
6. a kind of digital electric current relay according to claim 1, it is characterised in that: the OLED screen includes for mentioning
For the SXOUPTYX boost chip of backlight electric power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820840165.3U CN208723533U (en) | 2018-05-31 | 2018-05-31 | A kind of digital electric current relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820840165.3U CN208723533U (en) | 2018-05-31 | 2018-05-31 | A kind of digital electric current relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208723533U true CN208723533U (en) | 2019-04-09 |
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ID=65971070
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820840165.3U Active CN208723533U (en) | 2018-05-31 | 2018-05-31 | A kind of digital electric current relay |
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| CN (1) | CN208723533U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310938A (en) * | 2019-07-31 | 2021-02-02 | 华为技术有限公司 | Local side equipment, power supply system, electric shock protection method and device |
-
2018
- 2018-05-31 CN CN201820840165.3U patent/CN208723533U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112310938A (en) * | 2019-07-31 | 2021-02-02 | 华为技术有限公司 | Local side equipment, power supply system, electric shock protection method and device |
| CN112310938B (en) * | 2019-07-31 | 2022-04-12 | 华为技术有限公司 | Local side equipment, power supply system, electric shock protection method and device |
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