CN201474944U - Fault detecting device of direct current fan with alarm output - Google Patents
Fault detecting device of direct current fan with alarm output Download PDFInfo
- Publication number
- CN201474944U CN201474944U CN2009201637454U CN200920163745U CN201474944U CN 201474944 U CN201474944 U CN 201474944U CN 2009201637454 U CN2009201637454 U CN 2009201637454U CN 200920163745 U CN200920163745 U CN 200920163745U CN 201474944 U CN201474944 U CN 201474944U
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- current
- fan
- limiting resistance
- resistance
- signal processing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to a fault detecting device of a direct current fan with alarm output, which belongs to a detecting device. The fault detecting device comprises multi-path parallel fan fault detecting circuits which are connected to the input end of a signal processing unit, wherein one end of a first current-limiting resistor of each path of the fault detecting circuit is connected to a power source; and the other end of the first current-limiting resistor is connected to the input end of the signal processing unit and an alarm signal of the fan. The technical scheme can simultaneously detect faults of a plurality of fans, indicate the failure fans by an alarm lamp and is convenient and rapid to search the failure fans.
Description
Technical field
The utility model belongs to detection device, is specifically related to a kind of Fail detecting apparatus that the DC fan of alarm output is arranged.
Background technique
The existing power electronic equipment, the loss heating of itself is bigger, so often need use fan it is cooled off.Power supply in the control electronics has DC source to provide more, and the easy speed governing of DC fan, so DC fan often is used in the electronic equipment.Compare with ac fan, DC fan need increase parts and realize from direct current to the conversion that exchanges, so DC fan is prone to fault.Usually DC fan stall can occur, open circuit, not on the throne, when fault occurred, the equipment heating parts were probably because overheated and damage.Therefore, the accurately and timely detection for fan failure seems very important.
At present, DC fan is divided into nowhere to turn to alert output and two types of alarm outputs is arranged.With nowhere to turn to the fan of alert output, only provide the lead-in wire on power supply and ground.Detect fan-status if desired, then need to pass through external circuits, present most of approach realizes detecting by detecting fan electrical current, because there are some weakness in the fault detection method of this fan, so increasing user brings into use the DC fan that alarm output is arranged, this fan also has a fan guard sign except power supply and ground are arranged, and just seems particularly important for the reasonable processing of fan guard sign.
Existing is to connect suitable pull-up resistor and power supply on output fan guard sign to the fan detecting method that alarm output is arranged.The user generally judges according to the level conversion of fan signal whether fan is normal, as shown in Figure 1.
The existing fault detecting method needs respectively a plurality of trouble signals to be handled when a plurality of fans are handled, and the passage of Jian Ceing is more like this; Can cause damage to late-class circuit and fan when the fan reversal connection, and the guard sign of fan output is subject to disturbing factors influence such as temperature, power supply and level fluctuation occurs, the fluctuation of level can make subsequent conditioning circuit generation flase drop survey.
The model utility content
Technical problem to be solved in the utility model is, a kind of Fail detecting apparatus that the DC fan of alarm output is arranged is provided, and can realize simultaneously the faut detection of a plurality of fans and the fan that breaks down by the stand by lamp indication.
In order to address the above problem, the utility model discloses a kind of Fail detecting apparatus that the DC fan of alarm output is arranged, this device comprises the fan failure testing circuit of multi-channel parallel, all fan failure testing circuits attach to the input end of signal processing unit, wherein, an end of first current-limiting resistance is connected to power supply in each transportation work style fan failure testing circuit, and the other end of described first current-limiting resistance is connected to the guard sign of input end and this fan of described signal processing unit.
Further, in the said apparatus, also comprise the light emitting diode and second current-limiting resistance in each transportation work style fan failure testing circuit, one end of described first current-limiting resistance is connected to described power supply, the other end is connected to the guard sign of described fan and the anode of described light emitting diode, the negative electrode of described light emitting diode is connected to an end of described second current-limiting resistance, and the other end of described second current-limiting resistance is connected to the input end of described signal processing unit.
Further, described signal processing unit adopts optocoupler or triode to realize.
Wherein, when described signal processing unit adopts optocoupler to realize, one termination of described second current-limiting resistance is gone into the input end on the former limit of optocoupler, the output head grounding on the former limit of optocoupler, the input termination power of optical coupling secondary edges, the output terminal output detection signal of optical coupling secondary edges, simultaneously, described output terminal is by pull down resistor ground connection.
When described signal processing unit adopts triode to realize, one termination of described second current-limiting resistance is gone into the base stage of triode, also by divider resistance ground connection, the collector electrode of described triode connects power supply to the base stage of described triode, the emitter output detection signal of described triode.
In the same transportation work style fan failure testing circuit, described first current-limiting resistance is identical or different with the resistance of described second current-limiting resistance.
The resistance of first current-limiting resistance is identical or different described in the different fan failure testing circuits.
The resistance of second current-limiting resistance is identical or different described in the different fan failure testing circuits.
Technical solution of the present invention has adopted multi-way shared formula fault-detecting circuit, can carry out faut detection to a plurality of fans simultaneously, the existence that only need provide one tunnel fault output signal that fan failure just can be described, and the fan that breaks down by the stand by lamp indication, the fault fan is searched convenient quick.In addition; that the present invention not only realizes is on the throne to many DC fan, open circuit, the detection of guard sign is handled under the stall, reversal connection situation; when also having realized the fan reversal connection to effective protection of fan and testing circuit; improve the antijamming capability of fault-detecting circuit, make faut detection reliable more and accurate.
Description of drawings
Fig. 1 (a) is the fault-detecting circuit schematic representation of prior art to band guard sign output DC fan;
Fig. 1 (b) is a fan attachment plug schematic representation in the circuit shown in Fig. 1 (a);
Fig. 2 is a circuit diagram of the present invention;
Fig. 3 adopts optocoupler to realize the circuit diagram of signal processing in the present embodiment;
Fig. 4 (a) adopts the PC817 optocoupler to realize the circuit diagram of signal processing in the practical application of the present invention;
Fig. 4 (b) is a fan attachment plug schematic representation in the circuit shown in Fig. 4 (a);
Fig. 5 adopts triode to realize the circuit diagram of signal processing in the present embodiment.
Embodiment
Below in conjunction with drawings and the specific embodiments technical solution of the present invention is described in further detail.
A kind of Fail detecting apparatus that the DC fan of alarm output is arranged, as shown in Figure 2, the fan failure testing circuit that comprises multi-channel parallel, the number of the concrete fan failure testing circuit that is comprised is determined by the detection number of fans, for each transportation work style fan failure testing circuit, need a current-limiting resistance R, one terminates on the power supply 1 (being VCC1), the other end is received the anode of light emitting diode VD, the negative electrode of light emitting diode is received the end of current-limiting resistance RL, the other end of resistance R L is received the input of signal processing unit, and the fan guard sign then is connected to the anode of light emitting diode VD.
Wherein, in the same transportation work style fan failure testing circuit, the resistance of current-limiting resistance R and current-limiting resistance RL can be identical, also can be different; And between the different fan failure testing circuits, all current-limiting resistance R (being the current-limiting resistance R in the whole device) can select the resistance of same resistance for use, also can select the resistance of different resistances respectively for use, similarly, current-limiting resistance RL in the whole device also can select the resistance of same resistance for use, also can select the resistance of different resistances for use.
Introduce the working procedure of said apparatus below.
At first the guard sign of DC fan in each transportation work style fan failure testing circuit can be defined as FAN_Fx, (x=1,2,3...), the guard sign end is received on the VCC1 by current-limiting resistance R.When the fan proper functioning, signal FAN_Fx then keeps low level, and stream has electric current among the current-limiting resistance R, then there is not electric current to flow through among current-limiting resistance RL and the light emitting diode VD, at this moment, optocoupler or triode in the signal processing unit are in cut-off state, and light emitting diode lamp extinguishes;
When fan stall occurs or opens circuit, signal FAN_Fx then is a high-impedance state, be that signal FAN_Fx can keep high level, like this, former limit of optocoupler in the signal processing unit or transistor base exist from the electric current of VCC1 through ductility limit leakage resistance R, light emitting diode VD and current-limiting resistance RL, optocoupler or triode in the signal processing unit are in opening state, and light emitting diode lamp is lighted, the existing fault of this transportation work style fan-out of prompting user.
When reversal connection appearred in the fan plug, light emitting diode lamp was lighted, and owing to adopted current-limiting resistance RL, signal processing unit just can not cause overcurrent to burn out because of improper guard sign, and simultaneously, the warning circuit of fan inside can not damage yet.Be that current-limiting resistance RL has played the reverse connecting protection effect.In addition, the alarm output signal also is subject to external interference such as temperature, power supply and fluctuates under the fan normal operation, and the use of current-limiting resistance RL can also improve the antijamming capability of fault-detecting circuit.
In the said apparatus, signal processing unit can adopt optocoupler or triode to realize.When signal processing unit selected for use optocoupler to realize, according to the requirement of safety and circuit, the former border district of optocoupler can be connected also and can separate with secondary ground, and calculated the size of current-limiting resistance R and RL according to the optocoupler specification; When selecting triode for use, fan ground must be consistent with testing signal ground, and the resistance size of current-limiting resistance then needs the property calculation of opening according to triode.
Circuit when introducing the realization of signal processing unit employing optocoupler below earlier, as shown in Figure 3, the termination of current-limiting resistance RL is gone into the input end on the former limit of optocoupler, another termination VCC1 ground on the former limit of optocoupler; One of the secondary of optocoupler terminates on the VCC2, and the other end of secondary is received VCC2 on the ground by pull down resistor R ', and wherein, VCC1 can carry out being connected with VCC2 commonly, also can carry out non-ly connecting altogether; The secondary of optocoupler connects the testing signal that is the fan failure testing circuit of the output terminal output of pull down resistor.
Particularly, with the fan number that detects is 5 to be example, introduces the Fail detecting apparatus that adopts optocoupler to realize signal processing, at this moment, this Fail detecting apparatus has been selected the PC817 optocoupler for use, shown in Fig. 4 (a), the former limit of this optocoupler and secondary altogether, its firing current is 2 milliamperes and promptly satisfies conducting work, the recommendation maximum current should be above 50 milliamperes, light emitting diode is selected Φ 3 red luminotron tubes for use, and operating current is between 1 to 10mA, and current-limiting resistance R and RL all select 5.1K resistance for use.
When a stalled fan, the optocoupler input current is 2.4 milliamperes (being minimum working current), and electric current satisfies the light emitting diode job requirement, and promptly the tutorial light of the light emitting diode in this fan failure testing circuit brightens; When five full stalls of fan, the optocoupler input current is 12 milliamperes (being maximum operating currenbt), the tutorial light of the light emitting diode in the five transportation work style fan failure testing circuits all brightens, and this shows, minimum and maximum operating current is all within the operating range that optocoupler is recommended.Then can select 1N4148 for use for light emitting diode, because the maximum use of its recommendation electric current is 200 milliamperes, so can satisfy the circuit usage requirement.Resistance loss is 0.05W by accounting, and selecting power for use is that the resistance of 1/4W can satisfy circuit requirement as current-limiting resistance.
And experiment shows that when fan normally moved, optocoupler was closed in the fan failure testing circuit that constitutes according to above-mentioned each parameter, and red luminotron tube extinguishes and testing signal is a low level signal; When any one or more desk fans stall occurs, open circuit, insert and during fan reversal connection fault, the fan failure testing circuit all can start optocoupler work, testing signal is a high level signal, corresponding red luminotron tube is lighted simultaneously, detection signal level by signal processing unit output can be judged fan failure, can specifically locate the fan that breaks down by the red luminotron tube of being lighted.
Circuit when introducing the realization of signal processing unit employing triode below again, as shown in Figure 5, the termination of current-limiting resistance RL is gone into the base stage of triode, divider resistance R " one terminate on the base stage of triode; divider resistance R " the other end receive power supply on the ground, when using NPN or PNP triode, launching base draws or pull down resistor R ' on connecting, collector electrode inserts VCC2, and the signal of emitter output is the testing signal of fan failure testing circuit.
From the foregoing description as can be seen, apparatus of the present invention have adopted the fault-detecting circuit of multi-way shared formula at the DC fan of band alarm output, realization is to the faut detection of a plurality of fans and the fan that breaks down by the stand by lamp indication, and whole detection processing circuit is exported one road testing signal.In addition, when also can realizing the fan reversal connection, this method, improves the antijamming capability of fault-detecting circuit to effective protection of fan and processing circuit.
Certainly; the present invention also can have numerous embodiments; in the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making various corresponding changes or variation according to the present invention; in every case any modification of being done within the spirit and principles in the present invention, be equal to replacements, improvement, all should be included within the protection domain of the appended claim of the present invention.
Claims (8)
1. the Fail detecting apparatus that the DC fan of alarm output is arranged is characterized in that,
This device comprises the fan failure testing circuit of multi-channel parallel, all fan failure testing circuits attach to the input end of signal processing unit, wherein, an end of first current-limiting resistance is connected to power supply in each transportation work style fan failure testing circuit, and the other end of described first current-limiting resistance is connected to the guard sign of input end and this fan of described signal processing unit.
2. device as claimed in claim 1 is characterized in that,
Also comprise the light emitting diode and second current-limiting resistance in each transportation work style fan failure testing circuit, one end of described first current-limiting resistance is connected to described power supply, the other end is connected to the guard sign of described fan and the anode of described light emitting diode, the negative electrode of described light emitting diode is connected to an end of described second current-limiting resistance, and the other end of described second current-limiting resistance is connected to the input end of described signal processing unit.
3. device as claimed in claim 1 or 2 is characterized in that,
Described signal processing unit adopts optocoupler or triode to realize.
4. device as claimed in claim 2 is characterized in that,
When described signal processing unit adopts optocoupler to realize, one termination of described second current-limiting resistance is gone into the input end on the former limit of optocoupler, the output head grounding on the former limit of optocoupler, the input termination power of optical coupling secondary edges, the output terminal output detection signal of optical coupling secondary edges, simultaneously, described output terminal is by pull down resistor ground connection.
5. device as claimed in claim 2 is characterized in that,
When described signal processing unit adopts triode to realize, one termination of described second current-limiting resistance is gone into the base stage of triode, also by divider resistance ground connection, the collector electrode of described triode connects power supply to the base stage of described triode, the emitter output detection signal of described triode.
6. as claim 2,4 or 5 described devices, it is characterized in that,
In the same transportation work style fan failure testing circuit, described first current-limiting resistance is identical or different with the resistance of described second current-limiting resistance.
7. as claim 2,4 or 5 described devices, it is characterized in that the resistance of first current-limiting resistance is identical or different described in the different fan failure testing circuits.
8. as claim 2,4 or 5 described devices, it is characterized in that,
The resistance of second current-limiting resistance is identical or different described in the different fan failure testing circuits.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201637454U CN201474944U (en) | 2009-07-13 | 2009-07-13 | Fault detecting device of direct current fan with alarm output |
| PCT/CN2010/074137 WO2011006411A1 (en) | 2009-07-13 | 2010-06-21 | Dc fan fault detecting device and method with alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201637454U CN201474944U (en) | 2009-07-13 | 2009-07-13 | Fault detecting device of direct current fan with alarm output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201474944U true CN201474944U (en) | 2010-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201637454U Expired - Lifetime CN201474944U (en) | 2009-07-13 | 2009-07-13 | Fault detecting device of direct current fan with alarm output |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN201474944U (en) |
| WO (1) | WO2011006411A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011006411A1 (en) * | 2009-07-13 | 2011-01-20 | 中兴通讯股份有限公司 | Dc fan fault detecting device and method with alarm |
| CN106246586A (en) * | 2016-08-29 | 2016-12-21 | 西安特锐德智能充电科技有限公司 | A kind of DC fan failure detector circuit |
| CN102545661B (en) * | 2012-01-29 | 2017-02-08 | 蚌埠市科达电器有限公司 | Self-diagnosis direct-current power supply |
| CN109883568A (en) * | 2019-02-12 | 2019-06-14 | 辽宁达能电气股份有限公司 | A kind of constant temperature box device based on temperature-measuring system of distributed fibers |
| CN112797015A (en) * | 2019-11-13 | 2021-05-14 | 浙江宇视科技有限公司 | Fan temperature control and speed control device and system |
| CN116857216A (en) * | 2023-07-05 | 2023-10-10 | 安徽尚特杰电力技术有限公司 | Multi-fan fault detection circuit and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015060841A1 (en) | 2013-10-23 | 2015-04-30 | Hewlett-Packard Development Company, L.P. | Fan operation detection |
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| CN2277591Y (en) * | 1996-11-29 | 1998-04-01 | 李逢天 | Electrical equipment protecting device |
| US6163266A (en) * | 1998-12-08 | 2000-12-19 | Lucent Technologies Inc. | Fan operation detection circuit for a DC fan and method of operation thereof |
| TW444104B (en) * | 1999-10-21 | 2001-07-01 | Mitac Technology Corp | Fan protection device |
| JP2003111478A (en) * | 2001-09-28 | 2003-04-11 | Japan Servo Co Ltd | Fan motor provided with abnormal-revolution detecting circuit |
| JP2006253326A (en) * | 2005-03-09 | 2006-09-21 | Furukawa Electric Co Ltd:The | Optical amplifier device |
| CN100590570C (en) * | 2005-07-15 | 2010-02-17 | 联想(北京)有限公司 | Fan redundant system |
| CN101338763B (en) * | 2007-07-02 | 2012-03-28 | 鸿富锦精密工业（深圳）有限公司 | Fan with fault detection |
| CN201233424Y (en) * | 2008-07-30 | 2009-05-06 | 中兴通讯股份有限公司 | Dc fan failure testing apparatus |
| CN201474944U (en) * | 2009-07-13 | 2010-05-19 | 中兴通讯股份有限公司 | Fault detecting device of direct current fan with alarm output |
-
2009
- 2009-07-13 CN CN2009201637454U patent/CN201474944U/en not_active Expired - Lifetime
-
2010
- 2010-06-21 WO PCT/CN2010/074137 patent/WO2011006411A1/en active Application Filing
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011006411A1 (en) * | 2009-07-13 | 2011-01-20 | 中兴通讯股份有限公司 | Dc fan fault detecting device and method with alarm |
| CN102545661B (en) * | 2012-01-29 | 2017-02-08 | 蚌埠市科达电器有限公司 | Self-diagnosis direct-current power supply |
| CN106246586A (en) * | 2016-08-29 | 2016-12-21 | 西安特锐德智能充电科技有限公司 | A kind of DC fan failure detector circuit |
| CN106246586B (en) * | 2016-08-29 | 2018-04-03 | 西安特锐德智能充电科技有限公司 | A kind of DC fan failure detector circuit |
| CN109883568A (en) * | 2019-02-12 | 2019-06-14 | 辽宁达能电气股份有限公司 | A kind of constant temperature box device based on temperature-measuring system of distributed fibers |
| CN112797015A (en) * | 2019-11-13 | 2021-05-14 | 浙江宇视科技有限公司 | Fan temperature control and speed control device and system |
| CN116857216A (en) * | 2023-07-05 | 2023-10-10 | 安徽尚特杰电力技术有限公司 | Multi-fan fault detection circuit and method |
| CN116857216B (en) * | 2023-07-05 | 2024-04-26 | 安徽尚特杰电力技术有限公司 | Multi-fan fault detection circuit and method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011006411A1 (en) | 2011-01-20 |
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Granted publication date: 20100519 |