CN104280599A - Three-phase voltage signal detection alarm circuit - Google Patents
Three-phase voltage signal detection alarm circuit Download PDFInfo
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- CN104280599A CN104280599A CN201410593791.3A CN201410593791A CN104280599A CN 104280599 A CN104280599 A CN 104280599A CN 201410593791 A CN201410593791 A CN 201410593791A CN 104280599 A CN104280599 A CN 104280599A
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Abstract
The invention discloses a three-phase voltage signal detection alarm circuit, and relates to the field of circuit signal detection control. The three-phase voltage signal detection alarm circuit comprises a voltage division unit, a signal processing unit, a comparison unit, a signal alarm unit, a wired-and unit and an MCU. The voltage division unit divides voltage into two different voltage values V1-L and V2-L through resistors R59, R67, R60 and R68, wherein the voltage values V1-L and V2-L are used by the comparison unit. The signal processing unit receives a signal sent by a signal input unit and supplies the signal to the comparison unit. The comparison unit compares the received signal of the signal processing unit with the voltage values V1-L and V2-L. The wired-and unit generates a wired-and signal. The MCU collects a signal sent by the comparison unit through a resistor, collects the signal output by the wired-and unit, and controls an LED control chip. The signal alarm unit receives the output signal of the wired-and unit, process the signal and gives alarm information. The three-phase voltage signal detection alarm circuit can detect overvoltage and undervoltage of three-phase voltage, and gives an alarm.
Description
Technical field
The present invention relates to circuit signal detection control field, be specifically related to a kind of three-phase voltage signal and detect warning circuit.
Background technology
In power collection systems, the voltage that system gathers there is fluctuation, and in order to make system normally work, the fluctuation of voltage should be limited in certain scope, when voltage is called under-voltage lower than this scope, is then called superpressure higher than this scope.Ensureing that voltage is no more than afore mentioned rules scope is the precondition that acquisition system normally works, therefore, be necessary to design the under-voltage detection warning circuit of a kind of three-phase voltage signal superpressure, alarming processing is done to three-phase voltage signal ultra under-pressure signal, thus under making acquisition system be operated in normal voltage.
Summary of the invention
The object of the invention is to how to realize detecting the voltage collected in power collection systems and controlling, provide a kind of three-phase voltage signal and detect warning circuit, can detect three-phase voltage, and do alarming processing when three-phase voltage ultra under-pressure, under making acquisition system be operated in normal voltage.
Concrete scheme of the present invention is: a kind of three-phase voltage signal detects warning circuit, comprises partial pressure unit, signal processing unit, comparing unit, signal Alarm Unit, line and unit and MCU;
Partial pressure unit, by voltage by resistance R59, R67, R60 and R68 separate two different magnitude of voltage V1-L and V2-H for comparing unit;
Signal processing unit, the signal that Received signal strength input block transmits, and signal is supplied comparing unit;
Comparing unit, compares the signal of the signal processing unit of reception and magnitude of voltage V1-L and V2-H;
Line and unit, produce line and signal;
Signal Alarm Unit, comprises relay switch unit, hummer and LED light, and described relay switch unit receives line and element output signal;
MCU, gathers comparing unit output signal, gathering line and element output signal, controls hummer and LED light, simultaneously also controls LCD control chip and LCD screen, described LCD control chip connection LCD screen.
Further, be also provided with FLASH, described FLASH connects MCU, for storage failure information.
Further, described LCD control chip is connected with MCU by SPI communication facilities.
Further, described signal processing unit comprises amplifier and diode, and the output AC voltage of A, B, C three-phase is respectively by R49, R51, R63, form three-phase small voltage signal after R66 and R78, R81, then obtain the small-signal mean value of alternating voltage by amplifier and diode.
Further, described comparing unit comparer model used is LM393.
Further, described MCU model is STM32F103VET6.
Further, the model of described LCD control chip is TSC2046.
Further, the model of described FLASH is SST25VF016B.
The invention has the beneficial effects as follows: can detect the three-phase voltage of power collection systems, and do alarming processing when three-phase voltage ultra under-pressure, under making acquisition system be operated in normal voltage.
Accompanying drawing explanation
Fig. 1 is that a kind of three-phase voltage signal of the present invention detects warning circuit one-piece construction schematic diagram.
Fig. 2 is connection layout between each element of partial pressure unit of the present invention.
Fig. 3 is signal processing unit of the present invention, connection layout between comparing unit and each element of the unit such as line and unit.
Fig. 4 be signal Alarm Unit repeat circuit switch unit of the present invention each element between connection layout.
Fig. 5 is buzzer circuit structural drawing in the present invention.
Fig. 6 is LED light circuit structure diagram in the present invention.
Fig. 7 is LCD control chip and associated map interlinking thereof in the present invention.
Fig. 8 is FLASH chip and associated map interlinking thereof in the present invention.
Embodiment
Three-phase voltage signal of the present invention detects the one-piece construction of warning circuit as shown in Figure 1, comprises partial pressure unit, signal processing unit, comparing unit, signal Alarm Unit, line and unit and MCU;
Partial pressure unit, by voltage by resistance R59, R67, R60 and R68 separate two different magnitude of voltage V1-L and V2-H for comparing unit;
Signal processing unit, the signal that Received signal strength input block transmits, and signal is supplied comparing unit;
Comparing unit, compares the signal of the signal processing unit of reception and magnitude of voltage V1-L and V2-H;
Line and unit, produce line and signal;
Signal Alarm Unit, comprises relay switch unit, hummer and LED light, and described relay switch unit receives line and element output signal;
MCU, gathers comparing unit output signal, gathering line and element output signal, controls hummer and LED light, simultaneously also controls LCD control chip and LCD screen, described LCD control chip connection LCD screen.
As shown in Figure 2, in partial pressure unit, it is used for LM393 comparer that the voltage of 3.3V separates two different magnitude of voltage V1-L and V2-H by R59, R67, R60 and R68 resistance.Wherein to represent reference voltage low for V1-L, and when voltage is lower than being under-voltage during V1-L, it is high that V2-H represents reference voltage, when voltage is higher than being superpressure during V2-H.
Circuit shown in Fig. 3 is signal transacting in the present invention and the part such as compares.In the drawings, three-phase voltage signal carries out the small voltage signal that voltage division processing obtains three-phase voltage, and carries out full-wave rectification by amplifier and diode, obtains the small-signal mean value of alternating voltage.The mean value of the small-signal obtained by signal processing unit, the LM393 comparer entering into comparing unit compares, usually, V1-L<AVA<V2-H, V1-L<AVB<V2-H, V1-L<AVC<V2-H, wherein AVA, AVB and AVC represent the value of the three-phase voltage signal entering comparer respectively.At the voltage that scope is between V1-L to V2-H, output is normal; When giving the voltage signal of LM393 lower than V1-L voltage signal, comparer output voltage is low, and when giving the voltage signal of LM393 higher than V2-H voltage signal, comparer output voltage is high, and this signal enters into MCU and reports to the police.
A, B, C three-phase voltage signal alarm signal amount has faultA_L, faultA_H, faultB_L, faultB_H, faultC_L, faultC_H respectively.Signal alarm that A phase voltage is under-voltage is faultA_L, and superpressure is faultA_H; Signal alarm that B phase voltage is under-voltage is faultB_L, and superpressure is faultB_H; Signal alarm that C phase voltage is under-voltage is faultC_L, and superpressure is faultC_H; These semaphores gather to MCU as input signal, and wherein D26, D29, D31, D34, D36 and D39 are by diode composition line and signal.In normal voltage situation, line and result be high, now fault be high, and system is in normal operating conditions, and triggering KONGZHI signal, this signal can be used for controlling other system and enter normal operating conditions.When analysis obtains incongruent situation with normal voltage, line and signal be low, falut exports as low level, controls class signal to follow-up operation.
Relay switch unit as shown in Figure 4, when fault signal is high, system worked well, VT4 conducting, SW3 relay contact 1 is connected with 3; System malfunction at that time, when namely fault is low, VT4 ends, and SW3 relay contact 2 is connected with 3, namely 1 and 2 of J1 links together and forms dry contact signal, provide a path switching signal, as the input signal of hummer Buzzer and LED light.In Figure 5, when the ALM signal of relay switch unit output signal as hummer, MCU detect any road voltage superpressure or under-voltage all can control ALM signal to realize on-the-spot sound alarm.As shown in Figure 6, alarm signal also can be the input signal of LED light, MCU detects that any road voltage superpressure or the under-voltage LED light that all can control send alarm display, namely being the state of turning off the light time normal, is normal bright state during fault, wherein, LED1_A, LED2_B, LED3_C indicate information during A, B and C three-phase circuit fault respectively, and LED4_R indication circuit normally runs.
As shown in Figure 7, U3 is touch-screen LCD control chip, is communicated between it and MCU by SPI, and LCD screen can demonstrate the state of any road voltage signal, be namely normal, under-voltage or superpressure.The model of LCD control chip is TSC2046.
In addition, be also provided with FLASH in the present invention, as shown in Figure 8, described FLASH connects MCU, and for storage failure information, its model is SST25VF016B.
MCU is the core of this control circui, on the one hand, MCU collection signal, the signal of collection comprises comparing unit output signal and line and element output signal; On the other hand, circuit is controlled, comprise and control hummer, LED light, control LCD control chip and LCD screen.Described LCD control chip connects LCD screen.MCU model used in the present invention is STM32F103VET6.
Claims (8)
1. three-phase voltage signal detects a warning circuit, comprises partial pressure unit, signal processing unit, comparing unit, signal Alarm Unit, line and unit and MCU; It is characterized in that:
Partial pressure unit, by voltage by resistance R59, R67, R60 and R68 separate two different magnitude of voltage V1-L and V2-H for comparing unit;
Signal processing unit, the signal that Received signal strength input block transmits, and signal is supplied comparing unit;
Comparing unit, compares the signal of the signal processing unit of reception and magnitude of voltage V1-L and V2-H;
Line and unit, produce line and signal;
Signal Alarm Unit, comprises relay switch unit, hummer and LED light, and described relay switch unit receives line and element output signal;
MCU, gathers comparing unit output signal, gathering line and element output signal, controls hummer and LED light, simultaneously also controls LCD control chip and LCD screen, described LCD control chip connection LCD screen.
2. a kind of three-phase voltage signal according to claim 1 detects warning circuit, it is characterized in that, is also provided with FLASH, and described FLASH connects MCU, for storage failure information.
3. a kind of three-phase voltage signal according to claim 1 detects warning circuit, it is characterized in that, described LCD control chip is connected with MCU by SPI communication facilities.
4. a kind of three-phase voltage signal according to claim 1 or 2 or 3 detects warning circuit, it is characterized in that, described signal processing unit comprises amplifier and diode, the output AC voltage of A, B, C three-phase is respectively by R49, R51, R63, form three-phase small voltage signal after R66 and R78, R81, then obtain the small-signal mean value of alternating voltage by amplifier and diode.
5. a kind of three-phase voltage signal according to claim 1 detects warning circuit, and it is characterized in that, described comparing unit comparer model used is LM393.
6. a kind of three-phase voltage signal according to claim 1 and 2 detects warning circuit, and it is characterized in that, described MCU model is STM32F103VET6.
7. a kind of three-phase voltage signal according to claim 1 or 3 detects warning circuit, and it is characterized in that, the model of described LCD control chip is TSC2046.
8. a kind of three-phase voltage signal according to claim 2 detects warning circuit, and it is characterized in that, the model of described FLASH is SST25VF016B.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410593791.3A CN104280599B (en) | 2014-10-29 | 2014-10-29 | Three-phase voltage signal detection alarm circuit |
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| CN201410593791.3A CN104280599B (en) | 2014-10-29 | 2014-10-29 | Three-phase voltage signal detection alarm circuit |
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| CN104280599A true CN104280599A (en) | 2015-01-14 |
| CN104280599B CN104280599B (en) | 2017-02-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107234427A (en) * | 2017-06-19 | 2017-10-10 | 江苏亿能电气有限公司 | Busbar joint bolt tightens intelligent controlling device and method |
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| CN102135562A (en) * | 2011-02-22 | 2011-07-27 | 南京邮电大学 | Three-phase alternating-current detecting method and detecting device |
| CN202309022U (en) * | 2011-11-10 | 2012-07-04 | 浙江天煌科技实业有限公司 | Voltage protection circuit |
| CN203164277U (en) * | 2012-12-04 | 2013-08-28 | 阳光电源股份有限公司 | Overcurrent and overvoltage protection detection circuit |
| US20140159756A1 (en) * | 2011-05-30 | 2014-06-12 | Melexis Nv | Detecting device and current sensor |
| CN203772967U (en) * | 2014-03-26 | 2014-08-13 | 安徽安凯汽车股份有限公司 | Three-phase current and unbalanced or default phase detection circuit |
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2014
- 2014-10-29 CN CN201410593791.3A patent/CN104280599B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135562A (en) * | 2011-02-22 | 2011-07-27 | 南京邮电大学 | Three-phase alternating-current detecting method and detecting device |
| US20140159756A1 (en) * | 2011-05-30 | 2014-06-12 | Melexis Nv | Detecting device and current sensor |
| CN202309022U (en) * | 2011-11-10 | 2012-07-04 | 浙江天煌科技实业有限公司 | Voltage protection circuit |
| CN203164277U (en) * | 2012-12-04 | 2013-08-28 | 阳光电源股份有限公司 | Overcurrent and overvoltage protection detection circuit |
| CN203772967U (en) * | 2014-03-26 | 2014-08-13 | 安徽安凯汽车股份有限公司 | Three-phase current and unbalanced or default phase detection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107234427A (en) * | 2017-06-19 | 2017-10-10 | 江苏亿能电气有限公司 | Busbar joint bolt tightens intelligent controlling device and method |
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