CN2896218Y - Special-vehicle engine linear displacement sensor - Google Patents
Special-vehicle engine linear displacement sensor Download PDFInfo
- Publication number
- CN2896218Y CN2896218Y CN 200620001614 CN200620001614U CN2896218Y CN 2896218 Y CN2896218 Y CN 2896218Y CN 200620001614 CN200620001614 CN 200620001614 CN 200620001614 U CN200620001614 U CN 200620001614U CN 2896218 Y CN2896218 Y CN 2896218Y
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- China
- Prior art keywords
- bridge
- linear displacement
- magnetic core
- sensing element
- special
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- 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.)
- Expired - Fee Related
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Abstract
A special-vehicle engine linear displacement sensor which can work in high-temperature strong-vibration conditions, comprises a sensing coil (1) and a magnetic core (2) which are sealed and installed by high-temperature resistant glue inside a stainless steel case (6). The sensing element is constituted by L1 L2 of a high-temperature resistant two-section type solenoid (1) and a resistor R1,R2 of a circuit module (3) to form a differential bridge (9). The differential bridge is powered by a sinusoidal oscillator (10). Other two nodes of the bridge circuit output a differential AC voltage signal. And when the magnetic core moves in the solenoid, the bridge outputs a displacement signal which passes through the phase-sensitive rectifier (11) to convert the AC signal into a DC voltage which has a linear relation with the displacement, and then passes through a comprehensive amplifier (12) and a zero-setting & temperature compensator (13) to output a displacement measuring signal for conduction of the displacement measure.
Description
Technical field
The utility model relates to a kind of special vehicular engine linear displacement transducer, especially can be operated in the high reliability displacement transducer under high-temperature, the high vibration rugged surroundings.
Background technology
At present, known linear displacement transducer has multiple pattern, for example: the potentiometer formula, raster pattern, differential transformer types etc. vibrate under the less environment but these sensors can only be operated in low the reaching of environment temperature mostly, because the control of special car engine will be in the working environment of 100 ℃ of high temperature and 30g vibration acceleration with displacement transducer, adopt existing product easily to produce fault, can not satisfy special vehicular engine high reliability request.
Summary of the invention
The linear displacement transducer that the utility model provides has overcome above shortcoming, under the environment that is operated in high temperature and strong vibration that can be reliable, stable.
The technical scheme that its technical matters that solves the utility model adopts is: sensor is made up of sensing element and electronic circuit module, is encapsulated in the same Stainless Steel Shell with high temperature resistant silica gel.Sensing element is formed differential bridge by a high temperature resistant solenoid coil of two-part and two high reliability resistance, power to electric bridge by a sine wave oscillation circuit, a mobile magnetic core inserts in the solenoid coil, one of electric bridge output and the linear alternating voltage of magnetic core displacement when magnetic core moves, this signal is transformed to DC voltage behind phase sensitive detection, this DC voltage is carried out comprehensive computing amplification and temperature compensation, one of final output and the linear standard DC voltage of magnetic core straight-line displacement are to reach the purpose of Displacement Measurement.
Effect of the present utility model is: can measure under high temperature and high vibration environment and control special vehicular engine throttle, satisfying engine control is the high reliability requirement.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified:
Fig. 1 is this linear displacement transducer total structure figure.
Fig. 2 is sensing element and electronic circuit module composition diagram.
Embodiment
Among Fig. 1, two-part toroidal winding (1), seal by hiperloy pipe (4), be connected with lower cover (7), magnetic core (2) inserts in coil (1) hole forms sensing element. and the solenoid coil outlet is connected with circuit module (3), carries out Signal Regulation through electronic circuit module (3), and one group four higher temperature lines (5) are connected with circuit module (3), wherein three is the power supply line, and another root is an output signal line.Sensing element and electronic circuit module are encapsulated in Stainless Steel Shell (6) and loam cake (8) lower cover (7).
Fig. 2 is the electronic circuit module composition and is connected the L of sensor two-part solenoidal inductor
1L
2With the resistance R in the circuit module (3)
1, R
2Constitute a differential bridge (9), differential bridge is powered by sine-wave oscillator (10), at differential ac voltage signal of other two nodes output of bridge circuit, AC signal is converted to the DC voltage that is linearity with displacement through phase-sensitive detector (PSD) (11), through group amplifier (12), return to zero and temperature compensator (13) carry-out bit shift measurement signal again.
Claims (4)
1 one kinds of special vehicular engine linear displacement transducers, in Stainless Steel Shell, a sensing element is connected with one group of electronic circuit, it is characterized in that: sensing element is a high temperature resistant high reliability inductance resistance bridge and mobile magnetic core, and electronic circuit is by forming for bridge sine-wave oscillator and electric bridge output signal processing circuit.
2 special vehicular engine linear displacement transducers according to claim 1 is characterized in that: sensing element is by a high temperature resistant two-part solenoid coil L
1, L
2With two high reliability resistance R
1, R
2Form differential bridge (9), mobile magnetic core (2) inserts in the solenoid coil (1).
3 special vehicular engine linear displacement transducers according to claim 1, it is characterized in that: differential bridge (9) power supply of giving sensing element by sine-wave oscillator (10), differential bridge output signal and phase-sensitive detector (PSD) (11), group amplifier (12), zeroing and temperature-compensation circuit (13) are linked in sequence.
4 special vehicular engine linear displacement transducers according to claim 1, it is characterized in that: sensing coil (1), magnetic core (2) and circuit module (3) are encapsulated in the same Stainless Steel Shell (6) with high-temperature plastic, and one group four higher temperature lines (5) are connected with circuit module (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620001614 CN2896218Y (en) | 2006-01-23 | 2006-01-23 | Special-vehicle engine linear displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620001614 CN2896218Y (en) | 2006-01-23 | 2006-01-23 | Special-vehicle engine linear displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2896218Y true CN2896218Y (en) | 2007-05-02 |
Family
ID=38065794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620001614 Expired - Fee Related CN2896218Y (en) | 2006-01-23 | 2006-01-23 | Special-vehicle engine linear displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2896218Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620752A (en) * | 2011-02-22 | 2012-08-01 | 罗兰克斯两合有限公司 | Inductive position sensor |
| CN108127561A (en) * | 2017-12-19 | 2018-06-08 | 苏州锃道研磨技术有限公司 | It is a kind of to power off the retainable absolute position measure and control device of data and its investigating method |
-
2006
- 2006-01-23 CN CN 200620001614 patent/CN2896218Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620752A (en) * | 2011-02-22 | 2012-08-01 | 罗兰克斯两合有限公司 | Inductive position sensor |
| CN102620752B (en) * | 2011-02-22 | 2015-07-08 | 罗兰克斯两合有限公司 | Inductive pathmeasuring device |
| CN108127561A (en) * | 2017-12-19 | 2018-06-08 | 苏州锃道研磨技术有限公司 | It is a kind of to power off the retainable absolute position measure and control device of data and its investigating method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070502 |