CN104251967A - Novel central signal device - Google Patents
Novel central signal device Download PDFInfo
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- CN104251967A CN104251967A CN201410439515.1A CN201410439515A CN104251967A CN 104251967 A CN104251967 A CN 104251967A CN 201410439515 A CN201410439515 A CN 201410439515A CN 104251967 A CN104251967 A CN 104251967A
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- current
- current transformer
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- magnetic current
- relay
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 230000005674 electromagnetic induction Effects 0.000 abstract description 3
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- 230000008859 change Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 239000011800 void material Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000008140 language development Effects 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The invention discloses a novel central signal device, which comprises a digital to analog conversion chip, a single chip microprocessor, a display alarming unit and a gate magnetic current transformer, wherein the gate magnetic current transformer is used for sending a digital signal converted by the digital to analog conversion chip to the single chip microprocessor, and the single chip microprocessor is used for controlling the display alarming unit. The device is characterized in that as the electromagnetic induction is adopted, the magnetic flux gate type current transformer is not damaged under the external accident or any abnormal condition of early warning signal loops; the alarming is performed under the abnormal conditions of resistor short circuit and large current.
Description
Technical field
The invention belongs to detection field, especially a kind of pick-up unit for fault.
Background technology
At present at the national level, consisting of of central signal device: pulse relay, timing relay, auxiliary reclay, flashing relay, photon board, hummer, the compositions such as electric bell. existing problems: power consumption is large, volume is large, wiring link is many, the shortcomings such as construction is complicated. by the relay of the impact of current differential (integration) principle work, when accident and anticipating signal loop start, photon board, or resistance be switched on or switched off the sudden change causing signal electric power road instantaneous value, impact relay misoperation to do. or the mistake of resistance does not access or the diminishing of resistance, impact relay permanent damage, and the current number breaking down and predict cannot be known.
Summary of the invention
The object of the invention is to solve central signal device and suffer heavy current impact, fragile, fault number such as cannot to measure at the problem.
To achieve these goals, technical scheme of the present invention is achieved in that a kind of Novel central telltale of the present invention, comprise modulus conversion chip, single-chip microcomputer, display alarm unit and door magnetic current transducers, described door magnetic current transducers converts thereof into digital signal by described modulus conversion chip and is sent to described single-chip microcomputer, the display alarm unit described in described Single-chip Controlling.
Further, described door magnetic current transducers comprises resistance, current transformer and relay, and described current transformer installs around on the circuit between described resistance and relay, and described current transformer is connected with described single-chip microcomputer.
Further, described door magnetic current transducers also comprises fuse, and described fuse is arranged between described resistance summation current transformer.
Further, the resistance of described door magnetic current transducers has 18.
Further, described door magnetic current transducers has two, one for anticipating signal, one for trouble-signal.
The present invention, on original technology, gives up the heavy fragile parts such as pulse relay, timing relay, auxiliary reclay and flashing relay, adopts fluxgate type current sensor.Due to employing is electromagnetic induction, no matter there is any exception in outside accident and anticipating signal loop, all can not damage the fluxgate type current sensor of employing. and when occurring the abnormal alarm of resistive short big current, by this fluxgate type current sensor, the electric current of collection is converted to voltage to export, analog quantity is become digital quantity by modulus conversion chip sampling by this voltage, these data process by single-chip microcomputer, when this certain numerical value larger than last secondary data, will jingle bell, lamp dodges, and calculate the number of advance notice and accident by the process of digital quantity and export.
Accompanying drawing explanation
Fig. 1: fundamental diagram of the present invention.
Fig. 2: door magnetic current transducers structural drawing of the present invention.
Embodiment
As shown in Figure 1, a kind of Novel central telltale of the present invention, comprise a magnetic current transducers (1), modulus conversion chip (2), single-chip microcomputer (3) and display alarm unit (4), described door magnetic current transducers (1) converts thereof into digital signal by described modulus conversion chip (2) and is sent to described single-chip microcomputer (3), the display alarm unit (4) described in described single-chip microcomputer (3) controls.
As shown in Figure 2, door magnetic current transducers (1) comprises resistance R, current transformer T and relay, described current transformer T installs around on the circuit between described resistance R and relay, described current transformer (T) is connected with described single-chip microcomputer (3), described door magnetic current transducers (1) also comprises fuse F, described fuse F is arranged between described resistance R summation current transformer T, the resistance R of described door magnetic current transducers has 18, described door magnetic current transducers T has two, one for anticipating signal, one for trouble-signal.
Embodiment
Substance of the present invention is input as resistance 15K/20W, making alive 220VDC, the electric current produced, Gong Wei 36 tunnel, wherein 18 tunnels are anticipating signal, other 18 tunnels are trouble-signal, 18 tunnel anticipating signals and 18 tunnel trouble-signals are passed respective door magnetic-type current sensor, the electric current of change is converted to corresponding linear voltage by electromagnetic induction, linear voltage is converted to digital quantity by modulus conversion chip MAX187, interrupt its digital quantity of type collection by ATMEGA128 single-chip microcomputer by it again, then compare with previous digital quantity according to the digital quantity of current collection.If be greater than certain scope, run indicator is gone out, and calculate out of order number by comparing, shown by display device, hummer is loud, malfunction indicator lamp is bright, presses after removing failure button; Hummer stops the sound, and when fault is not got rid of, pilot lamp is still bright; When there being fault-signal to produce again, (when this digital quantity is greater than previous digital quantity certain limit) hummer continues the sound, malfunction indicator lamp is still bright, until fault gets rid of rear (when this digital quantity is not more than previous digital quantity certain limit) hummer completely stop the sound, malfunction indicator lamp is gone out, and run indicator is bright.
If there is a certain road short circuit phenomenon, electric current increases suddenly, input current scope due to this current transformer is 0-300MA, increase degree is: (220/15) * 18=264MA, stay certain surplus, when being greater than 280MA with convenient input current, can be judged as that certain road occurs that current-limiting resistance is abnormal, hummer sends the most urgent sound, and disconnected by monolithic processor controlled relay, (under normal operative condition, relay closes always, and Control is by the electric current of door magnetic-type mutual inductor).
Duty is divided into normal work, advance notice accident and big current fault three kinds of situations.
During normal work, input current is 0, be 2.50+/-0.05V when electric current is 0 by the output voltage of door magnetic current transducers CS01-P, after being changed by modulus conversion chip, digital quantity is 2500+/-50,, use pilot relay first to disconnect the electric current of a magnetic current transducers after switching on power, the initial value measuring access failure electric current stores, and then relay is kept closed, state running indicator lamp keeps bright.
During advance notice accident alarming, be that 220/15 mA multiple increases by the electric current of door magnetic current transducers, corresponding voltage 0.0586V multiple increases, and corresponding digital quantity increases with 58 multiples.Gathered by interrupt routine, be greater than gathered 50 last time if this gathers digital quantity, corresponding advance notice or breakdown lights bright, hummer rings, and running indicator goes out.Number of faults is with the ratio of its AD total increment and 58, by this data transfer on LCD12864, then press releasing advance notice/accident button, cancel sound, then when not removing fault, advance notice/breakdown lights is still bright, only have when the data value gathered maintains an equal level with not alive initial AD value, all advance notice/breakdown lights go out, and hummer stops ringing.
Big current fault, when the electric current by door magnetic current transducers is greater than 280MA, corresponding A D increment is 1120.When detecting that this is greater than 1120 than first AD increment, namely big current fault is judged as, now hummer rings, Control correspondence makes it disconnect by the current lead of door magnetic current transducers, by removing big current button, hummer stops ringing, and then search the circuit causing big current, after repairing loop, relay can automatically restore to initial closure state.
T is current transformer, by-pass, by fuse, and relay, the lower node of access voltage 220V and protection switch resistance.After switch has exception closed, cause the line current through coil to change, output voltage changes thereupon, voltage transitions is digital signal by MAX187, be transferred to single-chip microcomputer single-chip microcomputer data are processed, first record initial value, then this and previous record are compared.If this is greater than previous certain numerical value, cause hummer, pilot lamp is bright; (running indicator goes out) is if under having the situation of big current fault; first fuse F can protect relay; the data of single-chip microcomputer collection are greater than 1120 during than for the first time; be big current fault; Single-chip Controlling relay is opened; look into circuit and recover, can automatic closing relay after microprocessor detect completes.
When the outside branch road that will detect is more than 18 tunnel, on the one hand, the mode that outside seals in resistance can be changed, change the maximum way of input, through overtesting is maximum use outside access resistance for 100K/5W time, can respond reliably, when non-essential resistance is 100K/5W, its outside can connect maximum way: 130 tunnels, (300/ (220/100)=136), now the resolution of AD is 1200/136=8, digital quantity can detect completely, and leave certain surplus, each appearance be all the fiducial value of this and last time, as relative quantity, great elimination ripple impact. when if advance notice and accident are respectively more than 130 tunnel, the resolution (16 bit AD sample) of AD can be increased on the one hand, the input range of a magnetic current transducers can be increased on the other hand, this input range is 300mA, 2000MA can be increased to, export as 0-5V, so just can improve the way that input is reported to the police and predicted.
Adopt door magnetoelectricity stream advantage: the offset current that inner square wave oscillator produces compensates primary current, reach magnetic field balance, now output valve accurately reflects primary current, is mainly used in DC low current and difference current detection.
2, unitary design, DC leakage flow sensor takes unitary design, and replace the mode of traditional shunt+transmitter, the detection mode of other components and parts, volume is little, easy for installation, avoids in the problem occurring because space structure is too small using.
When will detect multiple equipment simultaneously, by RS485 interface, multiple equipment is carried out cascade, each equipment utilization 4 toggle switchs, carry out address and select and can have 0-15 altogether, and advance notice and each 18 tunnels of accident can be detected in each address, so monitor the advance notice that can detect at most for one, accident way is respectively: 18*15=288 road, and namely detecting advance notice and total way of accident is the so many sum of 288*2=576., can meet locally testing requirement.
Power unit adopts Jin Shengyang, power industry special module power supply, LH05-10D0512-01 module has global general-use input voltage range (90-264AC, 120-370DC), AC/DC, high reliability low-power consumption, safe and reliable isolation antijamming capability is strong, and high electrical-magnetic compatibility, exports with 5V as main output, 12V is auxiliary output, and the power supply of high stability ensure that native system works reliably.
Software aspect, ATMEGA128 is AVR 8 bit microprocessor of a high-performance, low-power consumption, integrated command function is very abundant, the resources such as internal memory are also all abundanter, in order to improve the readability of code, portability, maintainability and programming efficiency, native system uses C language development system software.The programming software adopted is ICC AVR6.25A, and simulated environment is AVR Studio 4.10.
Advanced RISC structure
– 133 Zhi are Linged – great majority and can be completed within a clock period
– 32 x 8 general purpose working registers+peripheral hardware control register
The full quiescent operation of –
When – works in 16 MHz, performance is up to 16 MIPS
– only needs the hardware multiplier of two clock period
non-volatile program and data-carrier store
The In-System Programmable Flash of – 128K byte
In the life-span: 10, write/erase cycle 000 time
– has independent locking bit, selectable start-up code district
In-system programming is realized by the start-up routine in sheet
Real reads-amendment-write operation
The EEPROM of – 4K byte
In the life-span: 100, write/erase cycle 000 time
The internal SRAM of – 4K byte
– reaches the external memory storage space of the optimization of 64K byte
– can programme to realize software cryptography to locking bit
– can realize in-system programming by ISP
jTAG interface (with IEEE 1149.1 operating such)
– follows the boundary-scan function of JTAG standard
– supports to debug in the sheet of expansion
– passes through JTAG Interface realization to Flash, EEPROM, the programming of fuse bit and locking bit
Timer 1 initialization
Main program is as follows:
Timer 1 initialization
void timer1_init(
void) { TCCR1B = 0x00; //stop TCNT1H = 0xFB; //setup TCNT1L = 0x1E; OCR1AH = 0x04; OCR1AL = 0xE2; OCR1BH = 0x04; OCR1BL = 0xE2; ICR1H = 0x04; ICR1L = 0xE2; TCCR1A = 0x00; TCCR1B = 0x03; //start Timer TIMSK |= 0x04; //timer interrupt sources; }
The main rating unit of program carries out in interruption 1, and specific procedure is as follows:
voidtimer1_ovf_isr (
void) { TCNT1H=0xFB; // be loaded into the high-order initial value TCNT1L=0x1E of counter; // be loaded into counter low level initial value uc_Led++; // accumulative frequency
if(uc_Led==50) // to (accomplish the time being greater than rising edge generation, prevent misoperation) { uc_Led=0 when 50 times; {
SpiAdc_Handler (); // outside SPI gathers current and voltage data function rusult1=SPI_adRes [0]; // frontly once gather current data }
{ spiAdc_Handler (); // outside SPI gathers current and voltage data function rusult3=SPI_adRes [0]; // after once gather current data
if(rusult1>0x05FF) // prevented just upper some moment, voltage by without to the change had, misoperation
if(rusult3>=(rusult1+0x0008)) // this is greater than a front 0X0008 { PORTF|=0X08; // control outside pilot lamp PORTF|=0X01; // control external speakers }
if(rusult3<0x081A) // be initial value.0X000F is added by first input voltage/A/D chip reference voltage * 4096; { PORTF &=0xFE; // control external speakers stopping PORTF &=0xF7; // controlling outside pilot lamp goes out.} } }
Claims (5)
1. a Novel central telltale, comprise modulus conversion chip, single-chip microcomputer and display alarm unit, it is characterized in that, also comprise a magnetic current transducers, described door magnetic current transducers converts thereof into digital signal by described modulus conversion chip and is sent to described single-chip microcomputer, the display alarm unit described in described Single-chip Controlling.
2. a kind of Novel central telltale according to claim 1, it is characterized in that, described door magnetic current transducers comprises resistance, current transformer and relay, described current transformer installs around on the circuit between described resistance and relay, and described current transformer is connected with described single-chip microcomputer.
3. a kind of Novel central telltale according to claim 2, is characterized in that, described door magnetic current transducers also comprises fuse, and described fuse is arranged between described resistance summation current transformer.
4. a kind of Novel central telltale according to Claims 2 or 3, is characterized in that, the resistance of described door magnetic current transducers has 18.
5. a kind of Novel central telltale according to claim 4, is characterized in that, described door magnetic current transducers has two, one for anticipating signal, one for trouble-signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410439515.1A CN104251967B (en) | 2014-09-01 | 2014-09-01 | A kind of novel central recoil simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410439515.1A CN104251967B (en) | 2014-09-01 | 2014-09-01 | A kind of novel central recoil simulator |
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| Publication Number | Publication Date |
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| CN104251967A true CN104251967A (en) | 2014-12-31 |
| CN104251967B CN104251967B (en) | 2017-10-03 |
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| CN201410439515.1A Active CN104251967B (en) | 2014-09-01 | 2014-09-01 | A kind of novel central recoil simulator |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2155572Y (en) * | 1993-03-12 | 1994-02-09 | 成都供电局 | Central signal device |
| CN1121218A (en) * | 1994-09-01 | 1996-04-24 | 赵庆杞 | Computerized central signal device |
| CN101191814A (en) * | 2007-12-03 | 2008-06-04 | 江苏省电力公司南京供电公司 | Intelligent type electric power wiring trouble indication method and indicator |
| CN101702506A (en) * | 2009-10-30 | 2010-05-05 | 中国船舶重工集团公司第七一九研究所 | Method and device for rapidly detecting short-circuit fault of power system |
| CN102723704A (en) * | 2012-06-14 | 2012-10-10 | 武汉大学 | Magnetic switch type short-circuit current fault detection method and device for same |
| CN203232553U (en) * | 2013-04-26 | 2013-10-09 | 天津市双源津瑞科技有限公司 | Direct current signal alarm device |
| CN204101690U (en) * | 2014-09-01 | 2015-01-14 | 陕西欧瑞特电气有限公司 | A kind of Novel central telltale |
-
2014
- 2014-09-01 CN CN201410439515.1A patent/CN104251967B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2155572Y (en) * | 1993-03-12 | 1994-02-09 | 成都供电局 | Central signal device |
| CN1121218A (en) * | 1994-09-01 | 1996-04-24 | 赵庆杞 | Computerized central signal device |
| CN101191814A (en) * | 2007-12-03 | 2008-06-04 | 江苏省电力公司南京供电公司 | Intelligent type electric power wiring trouble indication method and indicator |
| CN101702506A (en) * | 2009-10-30 | 2010-05-05 | 中国船舶重工集团公司第七一九研究所 | Method and device for rapidly detecting short-circuit fault of power system |
| CN102723704A (en) * | 2012-06-14 | 2012-10-10 | 武汉大学 | Magnetic switch type short-circuit current fault detection method and device for same |
| CN203232553U (en) * | 2013-04-26 | 2013-10-09 | 天津市双源津瑞科技有限公司 | Direct current signal alarm device |
| CN204101690U (en) * | 2014-09-01 | 2015-01-14 | 陕西欧瑞特电气有限公司 | A kind of Novel central telltale |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104251967B (en) | 2017-10-03 |
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Denomination of invention: Novel central signal device Effective date of registration: 20180918 Granted publication date: 20171003 Pledgee: Xi'an investment and financing Company limited by guarantee Pledgor: SHAANXI ALRIGHT ELECTRIC CO., LTD. Registration number: 2018610000153 |
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Date of cancellation: 20190904 Granted publication date: 20171003 Pledgee: Xi'an investment and financing Company limited by guarantee Pledgor: SHAANXI ALRIGHT ELECTRIC CO., LTD. Registration number: 2018610000153 |
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Denomination of invention: Novel central signal device Effective date of registration: 20190909 Granted publication date: 20171003 Pledgee: Xi'an investment and financing Company limited by guarantee Pledgor: SHAANXI ALRIGHT ELECTRIC CO., LTD. Registration number: Y2019980000127 |
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Date of cancellation: 20211020 Granted publication date: 20171003 Pledgee: Xi'an investment and financing Company limited by guarantee Pledgor: SHAANXI ALRIGHT ELECTRIC Co.,Ltd. Registration number: Y2019980000127 |