CN104967105A - Single LED data display power supply protector and display control method thereof - Google Patents
Single LED data display power supply protector and display control method thereof Download PDFInfo
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- CN104967105A CN104967105A CN201510415486.XA CN201510415486A CN104967105A CN 104967105 A CN104967105 A CN 104967105A CN 201510415486 A CN201510415486 A CN 201510415486A CN 104967105 A CN104967105 A CN 104967105A
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Abstract
The invention discloses a single LED data display power supply protector and a display control method thereof. A single chip microcomputer controls LED operation through a driving circuit and an operation state and three-phase voltage values are displayed through voltage indicating lamp flicker. Through comparing the three-phase voltage values to overvoltage and under-voltage thresholds preset in the single chip microcomputer, whether there is an overvoltage fault and an under-voltage fault is determined. Through comparing differences among the detected three-phase voltage values, whether there is an open-phase or three-phase unbalanced fault is determined. Through an operation and an analysis of an instantaneous value of the three-phase voltage values, a phase difference among the three-phase voltage values is obtained and whether there is a fault phase fault is determined. According to the above characteristics in the invention, data can be displayed as ultra-low cost; liquid crystal, backlight, a Nixie tube and a matched driving circuit are not needed; and easy coding in the invention can be learnt in one minute; during an internal data reading process, extra special-purpose equipment is not needed; the protector and the method can be widely used for a highly automated instrument.
Description
Technical field
The present invention relates to a kind of power supply protector, specifically relate to a kind of single LED data display power supply protector.
Background technology
Multifunctional three phase power source protector is normally with liquid crystal display or numeral method; can fault be shown over the display and show current voltage when breaking down; but; some client is contained on equipment to be needed to save cost; wish unwanted simplicity; such as do not need the client recording service data for a long time; need in addition to save space-efficient client; a lot of equipment control case is inherently very little; installation protector is entered again, and seem insufficient space, cannot install; again changing control cabinet can be pretty troublesome, also corresponding increase cost.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention proposes a kind of single LED data display power supply protector and aobvious control method thereof, can show data with very low cost, does not need liquid crystal, backlight, charactron and supporting drive circuit; When reading data, do not need extra special equipment, supermatic instrument can be widely used in.
Technical scheme of the present invention is achieved in that
A kind of single LED data display power supply protector, between its access three-phase alternating-current supply and three-phase electricity power consumption equipment, this power supply protector comprises single-chip microcomputer, voltage detection module, three-phase alternating-current supply, output module, power module and display module, described voltage detection module converts the three-phase alternating current that described three-phase alternating-current supply exports to low tension signal and inputs to described single-chip microcomputer, described single-chip microcomputer carries out A/D conversion to described low tension signal, obtain the three-phase voltage value corresponding to described three-phase alternating-current supply, and the overvoltage fault of described three-phase alternating-current supply is checked according to described three-phase voltage value, under-voltage fault, phase shortage and three-phase imbalance fault and misphase fault, when described microprocessor detect is to above-mentioned fault, cut off the power supply circuits between described three-phase alternating-current supply and three-phase electricity power consumption equipment by described output module, described power module is powered for described single-chip microcomputer, described voltage detection module and described output module after electric main is converted to direct current, the LED that described display module comprises for showing running status and three-phase voltage value runs and voltage indicator lamp, for showing the LED overvoltage indicator light of overvoltage fault, LED for showing under-voltage fault is under-voltage indicator light, for showing the LED phase shortage indicator light of phase shortage and three-phase imbalance fault, for showing LED phase sequence indicator light and its drive circuit of misphase fault, under the control of the control signal that described drive circuit exports at described single-chip microcomputer, described LED is driven to run and voltage indicator lamp, described LED overvoltage indicator light, described LED is under-voltage indicator light, described LED phase shortage indicator light, described LED phase sequence indicator light work.
As a further improvement on the present invention, described drive circuit is ULN2003, described LED runs and voltage indicator lamp, described LED overvoltage indicator light, described LED is under-voltage indicator light, described LED phase shortage indicator light, described LED phase sequence indicator light one end access the output of described ULN2003 respectively, the other end is connected respectively after a resistance and is accessed described power module, and the input of the corresponding each indicator light of described ULN2003 accesses control signal output corresponding to described single-chip microcomputer respectively.
As a further improvement on the present invention, described output module comprises the switching device be connected with described interface microcontroller and the warning device that can send alarm signal.
A kind of aobvious control method of single LED data display power supply protector, this power supply protector comprises single-chip microcomputer, voltage detection module, three-phase alternating-current supply, power module and display module, described display module comprises LED for showing running status and three-phase voltage value and runs and voltage indicator lamp and its drive circuit, for described single-chip microcomputer, described voltage detection module are powered after electric main is converted to direct current by described power module; Described voltage detection module converts the three-phase alternating current that described three-phase alternating-current supply exports to low tension signal and inputs to described single-chip microcomputer, described single-chip microcomputer carries out A/D conversion to described low tension signal, obtain the three-phase voltage value corresponding to described three-phase alternating-current supply, described single-chip microcomputer controls described LED operation by described drive circuit and voltage indicator lamp flicker shows running status and three-phase voltage value, its mode is: defining short bright extinguishing is again flicker, and defining short flicker again of going out is blinking intervals; The corresponding one group of data of every phase voltage value, with the long bright beginning once representing one group of data; Represent the size of each numerical value with the number of times of flicker, represent value of zero 10 times to glimmer; First show seniority top digit, then show lower-order digit, between seniority top digit and lower-order digit, insert a blinking intervals; Distinguish with blinking intervals between three groups of data; The display of three groups of data is complete, occurs that one longly goes out, and wait for next grow bright represent renewal after the display of three-phase voltage value start.
As a further improvement on the present invention, this power supply protector also comprises output module, described power module is powered for described output module after electric main is converted to direct current, described display module also comprises the LED overvoltage indicator light for showing overvoltage fault, LED for showing under-voltage fault is under-voltage indicator light, for showing the LED phase shortage indicator light of phase shortage and three-phase imbalance fault, for showing LED phase sequence indicator light and its drive circuit of misphase fault, described single-chip microcomputer is by comparing the overvoltage and brownout threshold preset in three-phase voltage value and single-chip microcomputer, judge whether to there is overvoltage fault and under-voltage fault, by comparing the difference between the three-phase voltage value that detects, judge whether to there is phase shortage or three-phase imbalance fault, by the operational analysis to three-phase voltage value instantaneous value, obtain the phase difference between three-phase voltage value, judge whether to there is misphase fault, described microprocessor detect, to when there is above-mentioned fault, cuts off the power supply circuits between described three-phase alternating-current supply and three-phase electricity power consumption equipment by described output module, and described single-chip microcomputer controls described LED overvoltage indicator light or the under-voltage indicator light of described LED or described LED phase shortage indicator light or described LED phase sequence indicator light by described drive circuit lights this fault of display.
The invention has the beneficial effects as follows: the invention provides a kind of single LED data display power supply protector and aobvious control method thereof, wherein, single-chip microcomputer is run by drive circuit control LED and voltage indicator lamp flicker shows running status and three-phase voltage value, and by comparing the overvoltage and brownout threshold preset in three-phase voltage value and single-chip microcomputer, judge whether to there is overvoltage fault and under-voltage fault, by comparing the difference between the three-phase voltage value that detects, judge whether to there is phase shortage or three-phase imbalance fault, by the operational analysis to three-phase voltage value instantaneous value, obtain the phase difference between three-phase voltage value, judge whether to there is misphase fault, the above-mentioned feature of the present invention can show data with very low cost, does not need liquid crystal, backlight, charactron and supporting drive circuit, and the straightaway coding of the present invention, within 1 minute, just can learn, when reading internal data, do not need extra special equipment, supermatic instrument can be widely used in.Owing to eliminating liquid crystal, backlight, charactron and supporting drive circuit; therefore; list LED data display power supply protector small volume of the present invention; client can be met and save space-efficient needs; solve the space of existing control cabinet own little; cannot install power supply protector, again changing control cabinet can be pretty troublesome, also the technical barrier of corresponding increase cost.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention;
Fig. 2 is the circuit diagram of voltage detection module in the present invention;
Fig. 3 is the circuit diagram of display module in the present invention;
Fig. 4 is the circuit diagram of output module in the present invention;
Fig. 5 is the circuit diagram of single-chip microcomputer in the present invention;
Fig. 6 is the circuit diagram of power module in the present invention;
Fig. 7 is three-phase voltage value of the present invention display schematic diagram.
Embodiment
In order to more clearly understand technology contents of the present invention, describe in detail especially exemplified by following examples, its object is only better understand content of the present invention but not limit the scope of the invention.
As shown in Figure 1, a kind of single LED data display power supply protector, between its access three-phase alternating-current supply and three-phase electricity power consumption equipment, this power supply protector comprises single-chip microcomputer, voltage detection module, three-phase alternating-current supply, output module, power module and display module, described voltage detection module (see Fig. 2) converts the three-phase alternating current that described three-phase alternating-current supply exports to low tension signal and inputs to described single-chip microcomputer, see Fig. 5, described single-chip microcomputer carries out A/D conversion to described low tension signal, obtain the three-phase voltage value corresponding to described three-phase alternating-current supply, and the overvoltage fault of described three-phase alternating-current supply is checked according to described three-phase voltage value, under-voltage fault, phase shortage and three-phase imbalance fault and misphase fault, when described microprocessor detect is to above-mentioned fault, cut off the power supply circuits between described three-phase alternating-current supply and three-phase electricity power consumption equipment by described output module, power for described single-chip microcomputer, described voltage detection module and described output module after electric main is converted to direct current by described power module (see Fig. 6), the LED that described display module comprises for showing running status and three-phase voltage value runs and voltage indicator lamp, for showing the LED overvoltage indicator light of overvoltage fault, LED for showing under-voltage fault is under-voltage indicator light, for showing the LED phase shortage indicator light of phase shortage and three-phase imbalance fault, for showing LED phase sequence indicator light and its drive circuit of misphase fault, under the control of the control signal that described drive circuit exports at described single-chip microcomputer, described LED is driven to run and voltage indicator lamp, described LED overvoltage indicator light, described LED is under-voltage indicator light, described LED phase shortage indicator light, described LED phase sequence indicator light work.Like this, single-chip microcomputer is by comparing the overvoltage and brownout threshold preset in three-phase voltage value and single-chip microcomputer, the function judging whether to there is overvoltage fault and under-voltage fault can be realized, by comparing the difference between the three-phase voltage value that detects, the function judging whether to there is phase shortage or three-phase imbalance fault can be realized, by the operational analysis to three-phase voltage value instantaneous value, obtain the phase difference between three-phase voltage value, the function judging whether to there is misphase fault can be realized, and by drive circuit and LED overvoltage indicator light, LED is under-voltage indicator light, LED phase shortage indicator light, the work of LED phase sequence indicator light shows, especially, single-chip microcomputer by drive circuit control LED run and voltage indicator lamp is capable of displaying status and three-phase voltage value.
Preferably, see Fig. 3, described drive circuit is ULN2003, described LED runs and voltage indicator lamp LED1, described LED overvoltage indicator light LED2, described LED is under-voltage indicator light LED3, described LED phase shortage indicator light LED4, described LED phase sequence indicator light LED5 one end access the output of described ULN2003 respectively, the other end is connected respectively after resistance R4, R5, R6, R7, a R8 and is accessed described power module, and the input of the corresponding each indicator light of described ULN2003 accesses control signal output corresponding to described single-chip microcomputer respectively.
Preferably, see Fig. 4, described output module comprises the switching device JDQ1 be connected with described interface microcontroller and the warning device that can send alarm signal.
The aobvious control method of list LED data display power supply protector of the present invention is as follows:
For described single-chip microcomputer, described voltage detection module, described output module are powered after electric main is converted to direct current by described power module; Described voltage detection module converts the three-phase alternating current that described three-phase alternating-current supply exports to low tension signal and inputs to described single-chip microcomputer, described single-chip microcomputer carries out A/D conversion to described low tension signal, obtain the three-phase voltage value corresponding to described three-phase alternating-current supply, described single-chip microcomputer controls described LED operation by described drive circuit and voltage indicator lamp flicker shows running status and three-phase voltage value, see Fig. 7, its mode is: defining short bright extinguishing is again flicker, and defining short flicker again of going out is blinking intervals; The corresponding one group of data of every phase voltage value, with the long bright beginning once representing one group of data; Represent the size of each numerical value with the number of times of flicker, represent value of zero 10 times to glimmer; As " 3 " just glimmer 3 times, " 8 " just glimmer 8 times; " 0 " just glimmers 10 times.First show seniority top digit, then show lower-order digit, between seniority top digit and lower-order digit, insert a blinking intervals; As showing as " light on and off light on and off light on and off-go out-light on and off light on and off light on and off light on and off light on and off light on and off light on and off light on and off--light on and off of going out " of " 381 "; Distinguish with blinking intervals between three groups of data; The display of three groups of data is complete, occurs that one longly goes out, and wait for next grow bright represent renewal after the display of three-phase voltage value start.
Described single-chip microcomputer is by comparing the overvoltage and brownout threshold preset in three-phase voltage value and single-chip microcomputer, judge whether to there is overvoltage fault and under-voltage fault, by comparing the difference between the three-phase voltage value that detects, judge whether to there is phase shortage or three-phase imbalance fault, by the operational analysis to three-phase voltage value instantaneous value, obtain the phase difference between three-phase voltage value, judge whether to there is misphase fault; Described microprocessor detect, to when there is above-mentioned fault, cuts off the power supply circuits between described three-phase alternating-current supply and three-phase electricity power consumption equipment by described output module; And described single-chip microcomputer controls described LED overvoltage indicator light or the under-voltage indicator light of described LED or described LED phase shortage indicator light or described LED phase sequence indicator light by described drive circuit lights this fault of display.
To sum up, the invention provides a kind of single LED data display power supply protector and aobvious control method thereof, wherein, single-chip microcomputer is run by drive circuit control LED and voltage indicator lamp flicker shows running status and three-phase voltage value, and by comparing the overvoltage and brownout threshold preset in three-phase voltage value and single-chip microcomputer, judge whether to there is overvoltage fault and under-voltage fault, by comparing the difference between the three-phase voltage value that detects, judge whether to there is phase shortage or three-phase imbalance fault, by the operational analysis to three-phase voltage value instantaneous value, obtain the phase difference between three-phase voltage value, judge whether to there is misphase fault, the above-mentioned feature of the present invention can show data with very low cost, does not need liquid crystal, backlight, charactron and supporting drive circuit, and the straightaway coding of the present invention, within 1 minute, just can learn, when reading internal data, do not need extra special equipment, supermatic instrument can be widely used in.Owing to eliminating liquid crystal, backlight, charactron and supporting drive circuit; therefore; list LED data display power supply protector small volume of the present invention; client can be met and save space-efficient needs; solve the space of existing control cabinet own little; cannot install power supply protector, again changing control cabinet can be pretty troublesome, also the technical barrier of corresponding increase cost.
Above embodiment is with reference to accompanying drawing, to a preferred embodiment of the present invention will be described in detail.Those skilled in the art by carrying out amendment on various forms or change to above-described embodiment, but when not deviating from essence of the present invention, drops within protection scope of the present invention.
Claims (5)
1. a single LED data display power supply protector, between its access three-phase alternating-current supply and three-phase electricity power consumption equipment, it is characterized in that: this power supply protector comprises single-chip microcomputer, voltage detection module, three-phase alternating-current supply, output module, power module and display module, described voltage detection module converts the three-phase alternating current that described three-phase alternating-current supply exports to low tension signal and inputs to described single-chip microcomputer, described single-chip microcomputer carries out A/D conversion to described low tension signal, obtain the three-phase voltage value corresponding to described three-phase alternating-current supply, and the overvoltage fault of described three-phase alternating-current supply is checked according to described three-phase voltage value, under-voltage fault, phase shortage and three-phase imbalance fault and misphase fault, when described microprocessor detect is to above-mentioned fault, cut off the power supply circuits between described three-phase alternating-current supply and three-phase electricity power consumption equipment by described output module, described power module is powered for described single-chip microcomputer, described voltage detection module and described output module after electric main is converted to direct current, the LED that described display module comprises for showing running status and three-phase voltage value runs and voltage indicator lamp, for showing the LED overvoltage indicator light of overvoltage fault, LED for showing under-voltage fault is under-voltage indicator light, for showing the LED phase shortage indicator light of phase shortage and three-phase imbalance fault, for showing LED phase sequence indicator light and its drive circuit of misphase fault, under the control of the control signal that described drive circuit exports at described single-chip microcomputer, described LED is driven to run and voltage indicator lamp, described LED overvoltage indicator light, described LED is under-voltage indicator light, described LED phase shortage indicator light, described LED phase sequence indicator light work.
2. single LED data display power supply protector according to claim 1; it is characterized in that: described drive circuit is ULN2003; described LED runs and voltage indicator lamp, described LED overvoltage indicator light, described LED is under-voltage indicator light, described LED phase shortage indicator light, described LED phase sequence indicator light one end access the output of described ULN2003 respectively; the other end is connected respectively after a resistance and is accessed described power module, and the input of the corresponding each indicator light of described ULN2003 accesses control signal output corresponding to described single-chip microcomputer respectively.
3. single LED data display power supply protector according to claim 1, is characterized in that: described output module comprises the switching device be connected with described interface microcontroller and the warning device that can send alarm signal.
4. the aobvious control method of a single LED data display power supply protector, it is characterized in that: this power supply protector comprises single-chip microcomputer, voltage detection module, three-phase alternating-current supply, power module and display module, described display module comprises LED for showing running status and three-phase voltage value and runs and voltage indicator lamp and its drive circuit, for described single-chip microcomputer, described voltage detection module are powered after electric main is converted to direct current by described power module; Described voltage detection module converts the three-phase alternating current that described three-phase alternating-current supply exports to low tension signal and inputs to described single-chip microcomputer, described single-chip microcomputer carries out A/D conversion to described low tension signal, obtain the three-phase voltage value corresponding to described three-phase alternating-current supply, described single-chip microcomputer controls described LED operation by described drive circuit and voltage indicator lamp flicker shows running status and three-phase voltage value, its mode is: defining short bright extinguishing is again flicker, and defining short flicker again of going out is blinking intervals; The corresponding one group of data of every phase voltage value, with the long bright beginning once representing one group of data; Represent the size of each numerical value with the number of times of flicker, represent value of zero 10 times to glimmer; First show seniority top digit, then show lower-order digit, between seniority top digit and lower-order digit, insert a blinking intervals; Distinguish with blinking intervals between three groups of data; The display of three groups of data is complete, occurs that one longly goes out, and wait for next grow bright represent renewal after the display of three-phase voltage value start.
5. the aobvious control method of application according to claim 4 single LED data display power supply protector, it is characterized in that: this power supply protector also comprises output module, described power module is powered for described output module after electric main is converted to direct current, described display module also comprises the LED overvoltage indicator light for showing overvoltage fault, LED for showing under-voltage fault is under-voltage indicator light, for showing the LED phase shortage indicator light of phase shortage and three-phase imbalance fault, for showing LED phase sequence indicator light and its drive circuit of misphase fault, described single-chip microcomputer is by comparing the overvoltage and brownout threshold preset in three-phase voltage value and single-chip microcomputer, judge whether to there is overvoltage fault and under-voltage fault, by comparing the difference between the three-phase voltage value that detects, judge whether to there is phase shortage or three-phase imbalance fault, by the operational analysis to three-phase voltage value instantaneous value, obtain the phase difference between three-phase voltage value, judge whether to there is misphase fault, described microprocessor detect, to when there is above-mentioned fault, cuts off the power supply circuits between described three-phase alternating-current supply and three-phase electricity power consumption equipment by described output module, and described single-chip microcomputer controls described LED overvoltage indicator light or the under-voltage indicator light of described LED or described LED phase shortage indicator light or described LED phase sequence indicator light by described drive circuit lights this fault of display.
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| CN201510415486.XA CN104967105A (en) | 2015-07-15 | 2015-07-15 | Single LED data display power supply protector and display control method thereof |
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| CN201510415486.XA CN104967105A (en) | 2015-07-15 | 2015-07-15 | Single LED data display power supply protector and display control method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707043A (en) * | 2017-02-08 | 2017-05-24 | 杭州宇诺电子科技有限公司 | Three-phase alternating current phase detection method and phase detection system thereof |
| CN107257597A (en) * | 2017-08-07 | 2017-10-17 | 马博 | A kind of LED method of controlling switch and device |
| CN111491410A (en) * | 2020-04-30 | 2020-08-04 | 山东省计算中心（国家超级计算济南中心） | Method for indicating multiple states by one indicator light |
| CN112235914A (en) * | 2020-10-16 | 2021-01-15 | 中国直升机设计研究所 | Display control circuit with lamp for cabin switch plate |
| CN114660500A (en) * | 2022-05-19 | 2022-06-24 | 秦皇岛广控科技有限公司 | Three-phase monitoring protection system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1601911A (en) * | 2004-10-10 | 2005-03-30 | 海信集团有限公司 | Digital coding method using light flashing frequence to express information |
| CN101420114A (en) * | 2008-11-26 | 2009-04-29 | 朱鸽 | Multifunctional three phase power source protector |
| CN201797310U (en) * | 2010-09-25 | 2011-04-13 | 傅仰取 | N pole output protector of monitoring breaker |
| CN204858541U (en) * | 2015-07-15 | 2015-12-09 | 苏州创泰电子有限公司 | Single LED data display power protection ware |
-
2015
- 2015-07-15 CN CN201510415486.XA patent/CN104967105A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1601911A (en) * | 2004-10-10 | 2005-03-30 | 海信集团有限公司 | Digital coding method using light flashing frequence to express information |
| CN101420114A (en) * | 2008-11-26 | 2009-04-29 | 朱鸽 | Multifunctional three phase power source protector |
| CN201797310U (en) * | 2010-09-25 | 2011-04-13 | 傅仰取 | N pole output protector of monitoring breaker |
| CN204858541U (en) * | 2015-07-15 | 2015-12-09 | 苏州创泰电子有限公司 | Single LED data display power protection ware |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707043A (en) * | 2017-02-08 | 2017-05-24 | 杭州宇诺电子科技有限公司 | Three-phase alternating current phase detection method and phase detection system thereof |
| CN106707043B (en) * | 2017-02-08 | 2023-10-17 | 杭州宇诺电子科技有限公司 | Three-phase alternating current phase discrimination method and phase discrimination system thereof |
| CN107257597A (en) * | 2017-08-07 | 2017-10-17 | 马博 | A kind of LED method of controlling switch and device |
| CN111491410A (en) * | 2020-04-30 | 2020-08-04 | 山东省计算中心（国家超级计算济南中心） | Method for indicating multiple states by one indicator light |
| CN112235914A (en) * | 2020-10-16 | 2021-01-15 | 中国直升机设计研究所 | Display control circuit with lamp for cabin switch plate |
| CN112235914B (en) * | 2020-10-16 | 2022-06-21 | 中国直升机设计研究所 | Display control circuit with lamp for cabin switch plate |
| CN114660500A (en) * | 2022-05-19 | 2022-06-24 | 秦皇岛广控科技有限公司 | Three-phase monitoring protection system |
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Application publication date: 20151007 |