CN110322672A - A kind of helicopter engine fire alarm detection box - Google Patents
A kind of helicopter engine fire alarm detection box Download PDFInfo
- Publication number
- CN110322672A CN110322672A CN201910647623.0A CN201910647623A CN110322672A CN 110322672 A CN110322672 A CN 110322672A CN 201910647623 A CN201910647623 A CN 201910647623A CN 110322672 A CN110322672 A CN 110322672A
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- Prior art keywords
- circuit
- signal
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- fire alarm
- power
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/02—Monitoring continuously signalling or alarm systems
- G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
Abstract
The invention discloses a kind of helicopter engine fire alarms to detect box, including main control module 1, power module 2 and shell；The main control module 1 is responsible for the conditioning of helicopter engine fire detector resistance signal and acquisition, output " fire alarm " signal and " fire alarm line fault " signal respectively are acquired after differentiation to the resistance signal of input, including sensor drive driving circuit 101, detection cell circuit 102, CPLD control circuit 103, discrete magnitude output driving circuit 104, state pulse output circuit 105 and state pulse input circuit 106；Wherein, sensor drive driving circuit 101 is connect with detection cell circuit 102；CPLD control circuit 103 is connect with detection cell circuit 102, discrete magnitude output driving circuit 104, state pulse output circuit 105, state pulse input circuit 106 respectively.The present invention does not need any human intervention, sets up direct, reliable, quick " point-to-point " signal exchange channel between helicopter fire detector resistance signal and rear end acquisition equipment, improves the reliability and accuracy of alarm signal.
Description
Technical field
The invention belongs to avionics fields, and in particular to have to a kind of to the progress of fire detector signal in real time
The helicopter engine fire alarm of output multi-channel discrete signal detects box after acquisition, judgement.
Background technique
It is set in the status monitoring in helicopter engine cabin, typically drawing fire detector signal to be connected to correspond to acquire
Standby end is acquired, none equipment being acquired specifically for fire detector signal.Due to acquiring fire alarm letter on machine
Number equipment it is more, distribution is wide, acquisition process mode is different, causes inconsistent to the parameter value after identical signal acquisition, or even deposit
In large error；Same signal is connected to distinct device and is not acquired on the machine of also resulting in wiring complexity and signal load impedance not
The abnormal conditions matched lead to false-alarm or accidentally alert to happen occasionally.
Summary of the invention
Goal of the invention: providing a kind of helicopter engine fire alarm detection box, acquires the fire alarm of helicopter engine cabin in real time and visits
The resistance signal for surveying device output, exports reliable fire alarm alarm signal after being judged with criterion.
Technical solution:
A kind of helicopter engine fire alarm detection box, it is characterised in that: including main control module 1, power module 2 and shell
Body；
The main control module 1 is responsible for the conditioning of helicopter engine fire detector resistance signal and acquisition, to input
Resistance signal is acquired after differentiation output " fire alarm " signal and " fire alarm line fault " signal respectively, including sensor driving electricity
Road 101, detection cell circuit 102, CPLD control circuit 103, discrete magnitude output driving circuit 104, state pulse output circuit
105 and state pulse input circuit 106；Wherein, sensor drive driving circuit 101 is connect with detection cell circuit 102；CPLD control
Circuit 103 respectively with detection cell circuit 102, discrete magnitude output driving circuit 104, state pulse output circuit 105, state arteries and veins
Rush the connection of input circuit 106；
The 28VDC power supply of 2 pairs of power module inputs carries out peak surge protection, filtering, energy storage, power supply conversion, is
Main control module 1 provides power-off reset signal and reliable and stable 5VDC, 15VDC working power.
The power module 2 includes peak surge suppression circuit 201, electric source filter circuit 202, accumulator 203, power down
With reset circuit 204, power-switching circuit 205.Peak surge suppression circuit 201 is connect with electric source filter circuit 202, wherein point
Peak inhibits to use TVS pipe, and Surge suppression uses surge suppressor；Electric source filter circuit 202 is with accumulator 203 and power down and again
Position circuit 204 connects, and electric source filter circuit 202 is connect with power-switching circuit 205；202 pairs of electric source filter circuit inputs
28VDC power supply be filtered, avoid interfering with each other, power down and reset circuit 204 include MAX705, are lower than in 5V supply voltage
Low level reset signal is exported when 4.65V, when input power is lower than 11.25V, exports low level power-off signal.
The sensor drive driving circuit 101 connects resistance signal with a resistance over the ground, carries out voltage division processing；The inspection
Element circuit 102 is surveyed by the voltage after partial pressure compared with different setting voltage, to identify which fire detector impedance is in
In resistance value section, it is converted into varying voltage signal and is output to CPLD control circuit 103 being acquired；
The discrete magnitude output driving circuit 104 carries out large driven current density, electric current using Darlington triode HJ122D
Transfer ratio minimum 1000, under CPLD driving, maximum output current 360mA.
The discrete magnitude output driving circuit 104 shares 9 tunnels, the same per circuit all the way, exports 3 tunnel fire alarms, 3 respectively
Road fire alarm line fault signal and 3 tunnel fire alarms detect box fault-signal.
" fire alarm " signal, " fire alarm line fault " signal and " fire alarm detects box failure " signal output are respectively 3 tunnels,
Three kinds of output signal types are ground/open, and are ground when failure, but are not limited only to ground/open.Every road output signal electric current is not more than
200mA is not interfere with each other between each road signal.
The state output impulse circuit 105 is converted into "/open " arteries and veins by CPLD output state pulse after comparator
Punching output；State pulse input circuit 106 will input "/open " pulses switch at being output to CPLD after square wave.
The power-switching circuit 205 is made of the typical circuit of LT3685, including 5V power-switching circuit and 15V
Power-switching circuit.
The shell includes base member 3 and cover plate part 4, wherein main control module 1 is fixed on power module (2)
On base member 3, by the cover plate part 4 and external connection that are equipped with interface.
The utility model has the advantages that helicopter engine fire alarm detection box of the present invention passes through acquisition helicopter engine cabin fire detector
Resistance signal exports polymorphic type multichannel discrete signal, does not need any human intervention after being converted and being differentiated, in helicopter fire
Direct, reliable, quick " point-to-point " signal is set up between alert detector resistance signal and rear end acquisition equipment
Interchange channel effectively reduces swivel link and the impedance loss brought into the distribution of enging cabin fire detector resistance signal and misses
Difference improves the reliability and accuracy of alarm signal, reduces ground maintenance personnel demand and holding equipment is spent, reducing
Operation cost improves maintenance efficiency, reduces maintenance workload etc. with apparent advantage.And have outer dimension small, again
The features such as amount is light, environmental suitability is strong.Mainly have the beneficial effect that:
1) fire detector signal, fire detection fault and fire alarm detection box faults itself acquisition conversion and multichannel are defeated
Out
Engine fire alarm detection box is installed near helicopter engine cabin, acquires enging cabin fire detector signal
Afterwards, more alarm signals are independently exported after being converted and differentiated, and can detect box faults itself to fire detection route and fire alarm
It is detected, improves the utilization efficiency of fire detector signal, the multichannel discrete signal driving capability exported after conversion is strong, can
Meet rear end warning light or the direct acquisition of other plurality of devices.
2) engine fire detector signal acquisition precision is improved
Concentrated collection processing to enging cabin fire detector resistance signal, effectively reduces source signal on machine
The error that long distance transmission and distributed collection are brought into guarantees the precision of signal.
3) engine spark warning alert reliability and accuracy are improved
Acquisition to fire alarm mainly includes fire detector, fire detector acquisition route and fire alarm detection box itself
Three links, have all carried out acquisition process respectively in the technical solution of the present invention, have efficiently identified different input elements and have brought into
Failure, the position that alerts is accurately positioned, the generation of accidentally alarm is greatly reduced, improves the reliability of fire alarm alarm
And accuracy.
Detailed description of the invention
Fig. 1 is the principle of the present invention composition block diagram；
Fig. 2 is main control module functional block diagram；
Fig. 3 power module functional block diagram.
Wherein: 1- main control module, 2- power module, 3- base member, 4- cover plate part.101- sensor driving electricity
Road, 102- detection cell circuit, 103-CPLD control circuit, 104- discrete magnitude output driving circuit, the output of 105- state pulse
Circuit, 106- state pulse input circuit.201- peak surge suppression circuit, 202- electric source filter circuit, 203- accumulator,
204- power down and reset circuit, 205- power-switching circuit.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing, please refers to Fig.1 to Fig.3.
As shown in Figure 1, engine fire alarm detects box by main control module 1, power module 2, pedestal in the embodiment of the present invention
Component 3 and cover plate part 4 form.
Sensor drive driving circuit connects the resistance signal that helicopter fire detector exports with a resistance over the ground, carries out
Voltage division processing；Detection cell circuit by the voltage after partial pressure compared with different setting voltage, to identify fire detector impedance
Which in resistance value section, it is converted into varying voltage signal and is output to CPLD control circuit being acquired；When collecting resistance
Normal, the fire alarm when resistance signal is in 1k Ω to 9k Ω when signal is less than 1k Ω, when resistance signal is in 9k Ω to 12.22k Ω
Normally, the fire detection line fault when resistance signal is greater than 12.22k Ω.
As shown in Fig. 2, in one embodiment of the invention, main control module 1 includes sensor drive driving circuit 101, inspection
Survey element circuit 102, CPLD control circuit 103, discrete magnitude output driving circuit 104, state pulse output circuit 105, state
Pulse input circuit 106.Wherein, CPLD control circuit 103 respectively with detection cell circuit 102, discrete magnitude output driving circuit
104, state pulse output circuit 105, state pulse input circuit 106 connect；Sensor drive driving circuit is by resistance signal and one
A resistance is connected over the ground, carries out voltage division processing；Detection cell circuit 102 is by voltage and the different setting voltage ratios after partial pressure
Compared with, to identify which resistance value section fire detector impedance is in, be converted into varying voltage signal be output to CPLD control electricity
Road is acquired；Discrete magnitude output driving circuit mainly uses Darlington triode HJ122D to carry out large driven current density, electric current
Transfer ratio minimum 1000, under CPLD driving, maximum output current 360mA, discrete magnitude output driving circuit one shares 9
Road, it is the same per circuit all the way, 3 tunnel fire alarms, 3 tunnel fire alarm line fault signals and 3 tunnel fire alarms detection box failure are exported respectively
Signal.State output impulse circuit is converted into "/open " pulse output by CPLD output state pulse after comparator；Shape
State pulse input circuit then will input "/open " pulses switch at being output to CPLD after square wave.
As shown in figure 3, power module 2 includes peak surge suppression circuit 201, electric source filter circuit 202, accumulator
203, power down and reset circuit 204, power-switching circuit 205.Peak surge suppression circuit 201 and electric source filter circuit 202 connect
It connects, peak restrained uses TVS pipe, and Surge suppression uses surge suppressor；Electric source filter circuit 202 and accumulator 203 and fall
Electricity connect with reset circuit 204, filter circuit is mainly filtered the 28VDC power supply of input, avoid interfering with each other, power down and
Reset circuit is mainly made of MAX705, low level reset signal is exported when 5V supply voltage is lower than 4.65V, in input power
When lower than 11.25V, low level power-off signal is exported；Electric source filter circuit 202 is connect with power-switching circuit 205, power supply conversion
Circuit is made of the typical circuit of LT3685, including 5V power-switching circuit and 15V power-switching circuit.Electric power source pair of module input
Power supply carry out peak surge protection, filtering, energy storage, power supply conversion, provide power-off reset signal and stabilization for main control module
Reliable working power.
Base member 3 and cover plate part 4 belong to structure member, and input signal socket is fixed with structural member, and input is believed
It number is connect with main control module and power module by conducting wire.A specific embodiment of the invention can there are many physical structure,
Cover plate part and main control module, power module and base member are rigidly connected solid by screw in one of the embodiments,
It is fixed, so that each component is together to form an entirety.The present invention can two detection box remainings use, when function occurs in any detection box
Can the property lost failure when, another detection box can be monitored in real time by pulse signal, and output multi-channel " fire alarm detect box failure "
Signal.The engine fire alarm detection box outer dimension of technical solution of the present invention can be not more than 114mm × 72mm × 40mm, and weight is small
In 0.2kg, each module is fixed using the rigid connection of multiple spot screw, and printed board and electronic component spray three-proofing coating, and ring can be improved
The tolerance of border test.Engine fire alarm detects box and is fixed aboard by four screws, and disassembly is quick, easy to maintain.
Claims (9)
1. a kind of helicopter engine fire alarm detects box, it is characterised in that: including main control module (1), power module (2) and
Shell；
The main control module (1) is responsible for the conditioning of helicopter engine fire detector resistance signal and acquisition, to the electricity of input
Resistance signal is acquired after differentiation output signal respectively, including sensor drive driving circuit (101), detection cell circuit (102),
CPLD control circuit (103), discrete magnitude output driving circuit (104), state pulse output circuit (105) and state pulse input
Circuit (106)；Wherein, sensor drive driving circuit (101) is connect with detection cell circuit (102)；CPLD control circuit (103) point
Not with detection cell circuit (102), discrete magnitude output driving circuit (104), state pulse output circuit (105), state pulse
Input circuit (106) connection；
The power module (2) carries out peak surge protection, filtering, energy storage, power supply conversion to the 28VDC power supply of input, based on
Control module (1) provides power-off reset signal and reliable and stable 5VDC, 15VDC working power.
2. a kind of helicopter engine fire alarm according to claim 1 detects box, which is characterized in that the power module
It (2) include peak surge suppression circuit (201), electric source filter circuit (202), accumulator (203), power down and reset circuit
(204), power-switching circuit (205).Peak surge suppression circuit (201) is connect with electric source filter circuit (202), wherein spike
Inhibit to use TVS pipe, Surge suppression uses surge suppressor；Electric source filter circuit (202) and accumulator (203) and power down and
Reset circuit (204) connection, electric source filter circuit (202) are connect with power-switching circuit (205)；The electric source filter circuit
(202) the 28VDC power supply of input being filtered, avoids interfering with each other, power down and reset circuit (204) they include MAX705,
5V supply voltage exports low level reset signal when being lower than 4.65V, when input power is lower than 11.25V, exports low level power down
Signal.
3. a kind of helicopter engine fire alarm according to claim 1 detects box, which is characterized in that the sensor driving
Circuit (101) connects resistance signal with a resistance over the ground, carries out voltage division processing；The detection cell circuit (102) will divide
Voltage after pressure, to identify which resistance value section fire detector impedance is in, is converted into compared with different setting voltage
Varying voltage signal is output to CPLD control circuit (103) and is acquired.
4. a kind of helicopter engine fire alarm according to claim 1 detects box, which is characterized in that the discrete magnitude output
Driving circuit (104) using Darlington triode HJ122D carry out large driven current density, current transfer ratio minimum 1000,
Under CPLD driving, maximum output current 360mA.
5. a kind of helicopter engine fire alarm according to claim 4 detects box, which is characterized in that the discrete magnitude output
Driving circuit (104) shares 9 tunnels, the same per circuit all the way, export respectively 3 tunnel fire alarms, 3 tunnel fire alarm line fault signals and
3 tunnel fire alarms detect box fault-signal.
6. a kind of helicopter engine fire alarm according to claim 5 detects box, which is characterized in that " fire alarm " letter
Number, " fire alarm line fault " signal and the output of " fire alarm detect box failure " signal be respectively 3 tunnels, three kinds of output signal types are
Ground/open is ground when failure, but is not limited only to ground/open, and every road output signal electric current is not more than 200mA, between each road signal mutually not
Interference.
7. a kind of helicopter engine fire alarm according to claim 1 detects box, which is characterized in that the state output arteries and veins
Circuit (105) is rushed by CPLD output state pulse, be converted into after comparator "/open " pulse output；State pulse input
Circuit (106) will input "/open " pulses switch at being output to CPLD after square wave.
8. a kind of helicopter engine fire alarm according to claim 2 detects box, which is characterized in that the power supply turns
It changes circuit (205) to be made of the typical circuit of LT3685, including 5V power-switching circuit and 15V power-switching circuit.
9. a kind of helicopter engine fire alarm according to claim 1 detects box, which is characterized in that the shell includes bottom
Base member (3) and cover plate part (4), wherein main control module (1) and power module (2) are fixed on base member (3), are led to
Cross cover plate part (4) and external connection equipped with interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910647623.0A CN110322672A (en) | 2019-07-17 | 2019-07-17 | A kind of helicopter engine fire alarm detection box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910647623.0A CN110322672A (en) | 2019-07-17 | 2019-07-17 | A kind of helicopter engine fire alarm detection box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110322672A true CN110322672A (en) | 2019-10-11 |
Family
ID=68123757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910647623.0A Pending CN110322672A (en) | 2019-07-17 | 2019-07-17 | A kind of helicopter engine fire alarm detection box |
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| CN (1) | CN110322672A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005091238A2 (en) * | 2004-03-23 | 2005-09-29 | Du Plessis Jacobus Petrus Fran | Fire preventing or extinguishing system for an appliance |
| CN204215515U (en) * | 2014-07-11 | 2015-03-18 | 成都飞亚航空设备应用研究所有限公司 | A kind of fire alarm prior-warning device for twin engine |
| CN109342761A (en) * | 2018-09-11 | 2019-02-15 | 陕西千山航空电子有限责任公司 | A kind of rotor monitor speed processor |
| CN109407572A (en) * | 2018-09-10 | 2019-03-01 | 陕西千山航空电子有限责任公司 | A kind of engine parameter collecting cassette |
| CN209030186U (en) * | 2018-11-02 | 2019-06-25 | 中国航空工业集团公司西安飞机设计研究所 | A kind of discrete signal redundance output circuit |
-
2019
- 2019-07-17 CN CN201910647623.0A patent/CN110322672A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005091238A2 (en) * | 2004-03-23 | 2005-09-29 | Du Plessis Jacobus Petrus Fran | Fire preventing or extinguishing system for an appliance |
| CN204215515U (en) * | 2014-07-11 | 2015-03-18 | 成都飞亚航空设备应用研究所有限公司 | A kind of fire alarm prior-warning device for twin engine |
| CN109407572A (en) * | 2018-09-10 | 2019-03-01 | 陕西千山航空电子有限责任公司 | A kind of engine parameter collecting cassette |
| CN109342761A (en) * | 2018-09-11 | 2019-02-15 | 陕西千山航空电子有限责任公司 | A kind of rotor monitor speed processor |
| CN209030186U (en) * | 2018-11-02 | 2019-06-25 | 中国航空工业集团公司西安飞机设计研究所 | A kind of discrete signal redundance output circuit |
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Application publication date: 20191011 |
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| RJ01 | Rejection of invention patent application after publication |