CN104344874A - Tester for oil quantity sensor - Google Patents
Tester for oil quantity sensor Download PDFInfo
- Publication number
- CN104344874A CN104344874A CN201310337615.9A CN201310337615A CN104344874A CN 104344874 A CN104344874 A CN 104344874A CN 201310337615 A CN201310337615 A CN 201310337615A CN 104344874 A CN104344874 A CN 104344874A
- Authority
- CN
- China
- Prior art keywords
- inductor
- inductance
- tester
- capacitor
- electric capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention belongs to the technical field of aircraft avionics and particularly relates to a tester for an oil quantity sensor. The tester comprises a capacitance measuring tester and an electromagnetic protection circuit, wherein the electromagnetic protection circuit comprises a transient voltage suppressor diode D, a first capacitor C1 and a first capacitor C2, as well as a first inductor L1 and a second inductor L2 which are used for differential membrane protection; the transient voltage suppressor diode D is firstly connected between a first input end A0 and a second input end B0 of the capacitance measuring tester and is then respectively connected with the first ends of the first inductor L1 and the second inductor L2 which are used for differential membrane protection; the first capacitor C1 and the first capacitor C2 are respectively connected between the second end of the first inductor L1 and a ground wire as well as between the second end of the second inductor L2 and the ground wire; the second end of the first inductor L1 and the second end of the second inductor L2 are also connected with a first output end A1 and a second output end B1. According to the tester disclosed by the invention, decay suppression for multiple electromagnetic interferences can be effectively realized, protecting actions are quick, and the accuracy of a normal signal and the security of a post-stage circuit are guaranteed.
Description
Technical field
The invention belongs to Aircraft electro-technical field, particularly relate to a kind of fuel-quantity transducer exerciser.
Background technology
Fuel-quantity transducer is parts of aircraft oil mass system, and fuel-quantity transducer provides about oil mass data stored in fuel tank.Oil mass information be driver awing, a significant data of especially interpretation during long-distance flight.Therefore must verify it before installation, ensure that it is functional, otherwise the work of this system can be affected.Also do not have publicly for the checkout equipment of this component at present.
Fuel-quantity transducer comprises two class multiple sensors, and wherein a class is for testing initial capacitance value, another kind of for testing initial capacitance value and low pasta time alarm signal detection.Fuel-quantity transducer exerciser is mainly used in the test of this two classes sensor, comprises the test to first kind sensor initial capacitance value, and the detection to alarm signal when the initial capacitance value of Equations of The Second Kind sensor and its low pasta.
First kind fuel-quantity transducer forms a pipe capacitor by coaxial mounted aluminium-alloy pipe 1 and 2.Basic functional principle is as follows, as shown in Figure 1:
Pipe capacitor electrode capacitance CX and the fuel tank height of sensor are linear
Sensor electrical capacitance, with fuel head linear change, can represent with formula the following:
Sensor capacitance when Cx mono-fuel head is X;
X mono-fuel head;
H-sensor length (equaling fuel tank height);
The external radius of pipe in R1 mono-sensor;
The inside radius of R2 mono-sensor outer tube;
(2) formula is obtained after (1) formula being simplified;
Cx＝K
0X+C
k...............................................................（2）
From (2) formula, find out that Cx and fuel head are changing into linear relationship (capacitance of Ck is regular data when being sky fuel tank sensor, K
0also be constant).Due to employing is linear transducer, makes the directly proportional relation of the variable quantity of fuel tank height and electric capacity.When in fuel tank without oil time, sensor take air as the capacitor of medium, and electric capacity is Co.When filling it up with fuel oil in fuel tank, sensor take kerosene as the capacitor of medium, and electric capacity increases about one times than during empty fuel tank, i.e. Cx ≈ 2Co.
Equations of The Second Kind sensor has installed a telltale additional on the basis of the first kind, and this telltale fundamental diagram is as follows, as shown in Figure 2:
Telltale is made up of magnetic float and reed capsule.Magnetic float combination part moves up and down with the change of fuel head, and the acting force of magnetic field to the reed of reed capsule also changes thereupon.When acting force reaches the adhesive ampere-turn of reed, 2 reed adhesives, have connected relay coil circuit, control performer by the adhesive of relay with disconnection.
Summary of the invention
The technical problem to be solved in the present invention:
This exerciser mainly through capacitance measuring tester, adopt electromagnetic protection circuit, first kind sensor is carried out to the test of initial capacitance value, and the detection of alarm signal when initial capacitance value and its low pasta carry out to Equations of The Second Kind sensor.Ensure flight, reduce the rate of breakdown of aircraft.
As shown in Figure 4; fuel-quantity transducer exerciser; comprise capacitance measuring tester and electromagnetic protection circuit, wherein, electromagnetic protection circuit comprises transient voltage suppressor diode D, the first electric capacity C1, the first electric capacity C2 and the first inductance L 1, second inductance L 2 for the protection of difference film.Wherein capacitance measuring tester first connect transient voltage suppressor diode D between first input end A0, the second input end B0; then be connected with the first inductance L 1, second inductance L 2 first end protected for difference film respectively; be connected to the first electric capacity C1, the first electric capacity C2 between second end of the first inductance L 1, second inductance L 2 and ground wire, the second end of the first inductance L 1, second inductance L 2 is also connected with the first output terminals A 1, second output terminal B1.
Beneficial effect of the present invention:
Multiple electromagnetic interference (EMI) can be carried out suppression decay by the present invention effectively, and protection act is fast, ensure that the accuracy of normal signal and the security of late-class circuit.The present invention is reasonable in design, and staff is when detecting fuel-quantity transducer, and outside connection is simple, easy and simple to handle.This exerciser can be tested the initial capacitance value of fuel-quantity transducer on the one hand, avoids fault product directly to install, thus improves efficiency and the quality of aircraft general assembly, simplifies test routine on the other hand, improves work efficiency.
Accompanying drawing explanation
Figure 1 shows that fuel-quantity transducer fundamental diagram;
Figure 2 shows that oil mass warning signal device fundamental diagram;
Figure 3 shows that using state schematic diagram of the present invention;
Fig. 4 is circuit theory diagrams of the present invention, and wherein, the first electric capacity C1, the first electric capacity C2 are capacity cell, and the first inductance L 1, second inductance L 2 is inductance element.
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated.In global design process, selecting of components and parts all meets GJB546-1996 component quality guarantee specification.
For realizing accurately measuring of electric capacity initial value, the protective treatment of electromagnetic interference (EMI) need be carried out.
As shown in Figure 4.Electromagnetic protection circuit forms with the first inductance L 1, second inductance L 2 protected for difference film primarily of instantaneous voltage restraint component R, the first electric capacity C1, the first electric capacity C2.Wherein first connect transient voltage suppressor diode D between first input end A0, the second input end B0; then be connected with the first inductance L 1, second inductance L 2 first end protected for difference film respectively; be connected to the first electric capacity C1, the first electric capacity C2 between second end of the first inductance L 1, second inductance L 2 and ground wire, the second end of the first inductance L 1, second inductance L 2 is also connected with the first output terminals A 1, second output terminal B1.Multiple electromagnetic interference (EMI) can be carried out suppression decay by the present invention effectively, and protection act is fast, ensure that the accuracy of normal signal and the security of late-class circuit.
During test; with reference to figure 3; capacitance meter is received in 220V AC power; "+" of capacitance meter is connected with the first input end A0 of electromagnetic protection circuit; "-" of capacitance meter is connected with the second input end B0 of electromagnetic protection circuit, and the first output terminals A 1, second output terminal B1 of electromagnetic protection circuit, the 3rd output terminal D1 hold with fuel-quantity transducer " A, B, D " and be connected.
Use procedure of the present invention is as follows:
1) test of initial capacitance
Capacitance measuring tester range is put PF shelves, measures the first kind and Equations of The Second Kind fuel-quantity transducer initial capacitance value respectively.
2) telltale performance checking
Mainly to the test of Equations of The Second Kind fuel-quantity transducer: export as on-state during low pasta, conducting resistance≤10 ohm; Export during normal pasta and be off state, conducting resistance >=1 megaohm.
Claims (1)
1. fuel-quantity transducer exerciser, it is characterized in that, this exerciser comprises capacitance measuring tester and electromagnetic protection circuit, and wherein, electromagnetic protection circuit comprises transient voltage suppressor diode D, the first electric capacity C1, the first electric capacity C2 and the first inductance L 1, second inductance L 2 for the protection of difference film; Capacitance measuring tester first connect transient voltage suppressor diode D between first input end A0, the second input end B0; then be connected with the first inductance L 1, second inductance L 2 first end protected for difference film respectively; be connected to the first electric capacity C1, the first electric capacity C2 between second end of the first inductance L 1, second inductance L 2 and ground wire, the second end of the first inductance L 1, second inductance L 2 is also connected with the first output terminals A 1, second output terminal B1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310337615.9A CN104344874A (en) | 2013-08-05 | 2013-08-05 | Tester for oil quantity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310337615.9A CN104344874A (en) | 2013-08-05 | 2013-08-05 | Tester for oil quantity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104344874A true CN104344874A (en) | 2015-02-11 |
Family
ID=52500967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310337615.9A Pending CN104344874A (en) | 2013-08-05 | 2013-08-05 | Tester for oil quantity sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104344874A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546381A (en) * | 2015-09-18 | 2017-03-29 | 哈尔滨飞机工业集团有限责任公司 | A kind of fuel pressure gauge exerciser |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5979233A (en) * | 1995-03-10 | 1999-11-09 | National Enviromental Service Company | Liquid measuring system and methods |
| CN101281154A (en) * | 2008-05-21 | 2008-10-08 | 中国科学院合肥物质科学研究院 | Capacitance type gas sensor based on carbon nano-tube array and preparing method thereof |
| CN201600173U (en) * | 2010-01-06 | 2010-10-06 | 哈尔滨飞机工业集团有限责任公司 | Tester of helicopter oil gage indicator |
| CN201608522U (en) * | 2009-12-07 | 2010-10-13 | 北京欧地安科技股份有限公司 | High-energy electromagnetic pulse protection circuit for communication interface |
| CN202363893U (en) * | 2011-09-06 | 2012-08-01 | 北京广利核系统工程有限公司 | Digital input electromagnetic interference protection circuit |
-
2013
- 2013-08-05 CN CN201310337615.9A patent/CN104344874A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5979233A (en) * | 1995-03-10 | 1999-11-09 | National Enviromental Service Company | Liquid measuring system and methods |
| CN101281154A (en) * | 2008-05-21 | 2008-10-08 | 中国科学院合肥物质科学研究院 | Capacitance type gas sensor based on carbon nano-tube array and preparing method thereof |
| CN201608522U (en) * | 2009-12-07 | 2010-10-13 | 北京欧地安科技股份有限公司 | High-energy electromagnetic pulse protection circuit for communication interface |
| CN201600173U (en) * | 2010-01-06 | 2010-10-06 | 哈尔滨飞机工业集团有限责任公司 | Tester of helicopter oil gage indicator |
| CN202363893U (en) * | 2011-09-06 | 2012-08-01 | 北京广利核系统工程有限公司 | Digital input electromagnetic interference protection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546381A (en) * | 2015-09-18 | 2017-03-29 | 哈尔滨飞机工业集团有限责任公司 | A kind of fuel pressure gauge exerciser |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103412176B (en) | A kind of AC/DC arrester electric current real time on-line monitoring sensor based on magneto-resistor | |
| CN102608388B (en) | VFTO (very fast transient overvoltage) measurement method and system | |
| CN103018575B (en) | A kind of method utilizing large power, electrically sensing electricity testing device to measure high-power inductance | |
| CN105137163A (en) | Metal oxide varistor(MOV)-type arrester or surge protector resistive leakage current online monitoring method | |
| CN102944716A (en) | Lightning flow sensor of Rogowski coil based on printed circuit board | |
| CN203772937U (en) | Broadband active flexible coil capable of simultaneously detecting lightning current and power frequency alternating current | |
| CN102081136A (en) | Method for on-site GIS (Gas-insulated metal-enclosed switchgear) partial discharge detection under impulse voltage | |
| CN102737828A (en) | Capacitor voltage transformer provided with transient overvoltage monitoring unit | |
| CN104865468A (en) | Device and method for measuring shielding effectiveness of electromagnetic pulse of thunder and lightning | |
| CN103487659A (en) | Method for detecting breaker loop resistor based on high impulse currents | |
| CN103823098A (en) | Pre-discharge current detection device | |
| CN201853571U (en) | Voltage transformer based on capacitance-resistance voltage division principle | |
| CN106291076B (en) | A kind of double difference fraction D-dot overvoltage sensors and measuring system | |
| CN110456123A (en) | A kind of wideband transient voltage partial pressure measuring apparatus and method | |
| CN207007960U (en) | A kind of overhead transmission line Zinc oxide arrester monitoring device | |
| CN201259830Y (en) | Electronic voltage mutual inductor | |
| CN104344874A (en) | Tester for oil quantity sensor | |
| CN102062848A (en) | Calibrating device of output voltage of insulating oil dielectric strength tester | |
| CN111856345A (en) | Broadband magnetic field sensor device and method for measuring impulse current | |
| CN101393461A (en) | Radio frequency admittance admittance level controller | |
| CN203324357U (en) | Electronic voltage transformer used for detecting high voltage resistor current | |
| CN203164353U (en) | Head dismantling-free transformer medium spectrum testing structure | |
| CN205176101U (en) | Power frequency high voltage measurement device based on SF6 gas -insulated high voltage standard capacitor | |
| CN103543316B (en) | The transient voltage measuring system of Transformer Winding and method | |
| Rahim et al. | Partial Discharge Detection using Developed Low-cost High Frequency Current Transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150211 |
|
| RJ01 | Rejection of invention patent application after publication |