CN2611870Y - Inching motion transducer - Google Patents
Inching motion transducer Download PDFInfo
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- CN2611870Y CN2611870Y CN 03224972 CN03224972U CN2611870Y CN 2611870 Y CN2611870 Y CN 2611870Y CN 03224972 CN03224972 CN 03224972 CN 03224972 U CN03224972 U CN 03224972U CN 2611870 Y CN2611870 Y CN 2611870Y
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- magnet
- inductive coil
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- probe
- sensing mechanism
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Abstract
A micromotion displacement transducer comprises a probe (1) and detecting circuit, wherein the probe(1) comprises a probe body (11), a inductance coil (12) and a magnet (13) which are provided in the probe body (11), and a elastic transduction mechanism (15) of which the fixed portion is fixed on the probe body (11), and the inductance coil (12) being a hollow coil is fixed on the elastic transduction mechanism (15) and is lain in the magnetic field formed by itself. When the measured body touches the elastic transduction mechanism (15), the inductance coil (12) moves incising the magnetic line of the magnet (13) to produce the variation of magnetic flux in the inductance coil (12) and the induced electromotive force, then the electric impulse signal is exported.
Description
Technical field the utility model relates to surveying instrument, particularly highly sensitive object micro-displacement sensor.
Background technology displacement transducer of the prior art has electro-optical pickoff, piezoelectric film type sensor and tongue tube sensor etc., and electro-optical pickoff needs external power source and supports its work, still has energy consumption under holding state; The piezoelectric film type sensor certainly will hinder the motion of testee, and its sensitivity is lower because its sensing element is generally the PC shell fragment; And that the tongue tube sensor is influenced by external magnetic field is bigger; And the sensor all exists the high shortcoming of cost.
The summary of the invention the purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art, and a kind of sensitivity and reliability height, micro-displacement sensor that cost is low are provided.
The utility model comes specific implementation by implementing following technical scheme: this micro-displacement sensor comprises probe and testing circuit; Described probe comprises sonde body, is installed on inductive coil and magnet in the sonde body; Also include the elasticity sensing mechanism, its fixed part is fixed on the magnet, and detection portion stretches out outside the sonde body; Described magnet is fixed on the sonde body; Described inductive coil is an air core coil, and this inductive coil is fixed on the elasticity sensing mechanism, and makes it place magnet to form in the magnetic field; Testee touches the elasticity sensing mechanism, drives the motion that inductive coil is done the cutting magnet magnetic line of force, and the magnetic flux in the inductive coil changes, and produces induced electromotive force and output electric pulse signal.The utility model as moving component, reduces the weight of moving component with inductive coil, when touching the elasticity sensing mechanism gently, just can make inductive coil produce the bigger vibration of amplitude, thereby produce the electric signal that is enough to drive the follow-up work cell operation; In addition, owing to adopt air core coil, when coil vibrates in magnetic field, the magnetic damping that iron core produced in the inductive coil of having avoided being adopted in the prior art, make the amplitude of inductive coil not be subjected to the influence of magnetic damping, produce the bigger motion of amplitude, can export stronger pulse electrical signal, improve the sensitivity of sensor.In addition, micro-displacement sensor of the present utility model adopts oncontacting to be electrically connected, and can prolong the serviceable life of this micro-displacement sensor.
Description of drawings
Fig. 1 is that the master of the utility model micro-displacement sensor probe 1 looks cross-sectional schematic.
Fig. 2 is a principle of work block scheme of the present utility model.
Fig. 3 is the fundamental diagram of on-off circuit described in Fig. 23.
Fig. 4 is the decline three-dimensional cross-sectional schematic of moving displacement sensor probe of toroidal magnet.
Embodiment further describes the embodiment of the utility model below in conjunction with accompanying drawing.
By finding out among Fig. 1 and Fig. 2 that this micro-displacement sensor comprises probe 1 and testing circuit 2; Described probe 1 comprises sonde body 11, is installed on inductive coil 12 and magnet 13 in the sonde body 11; Also include elasticity sensing mechanism 15, its fixed part 151 is fixed on the magnet 13, and detection portion 152 stretches out outside the sonde body 11; Described magnet 13 is fixed on the magnetic conductor 16; Described inductive coil 12 is an air core coil, and this inductive coil is fixed on the elasticity sensing mechanism 15, and makes it place magnet 13 to form in the magnetic field; Testee touches elasticity sensing mechanism 15, drives the motion that inductive coil 12 is done cutting magnet 13 magnetic lines of force, and the magnetic flux in the inductive coil 12 changes, and produces induced electromotive force and output electric pulse signal.
By among Fig. 1 as can be known, described elasticity sensing mechanism 15 comprises resiliency supported sheet 153 and sensing part 154, described resiliency supported sheet 153 is fixed on the magnetic conductor 13; The stiff end of described sensing part 154 connects resiliency supported sheet 153, and end of probe is stretched out outside the sonde body 11; Described magnet 13 is a cylinder, inductive coil 12 is enclosed within the periphery of magnet 13, testee touches the end of probe of sensing part 154, drive resiliency supported sheet 153 and produce vibration, inductive coil 12 produces vibration under the 153 screen resilience effects of resiliency supported sheet, magnetic flux in the inductive coil 12 changes, and produces induced electromotive force and output electric pulse signal.
By among Fig. 4 as can be known, described elasticity sensing mechanism 15 is flexible rod member; The stiff end 155 of described shaft-like elasticity sensing mechanism 15 is fixed on the magnet 13, and end of probe 156 is stretched out outside the sonde body 11; Described magnet 13 is the opening ring-type, elasticity sensing mechanism 15 places inductive coil 12 fixing on it opening part of magnet 13, the end of probe 156 of testee elasticity sensing mechanism 15, driving inductive coil 12 fixing on the elasticity sensing mechanism 15 swings in the opening of magnet 13, magnetic flux in the inductive coil 12 changes, and produces induced electromotive force and output electric pulse signal.
As seen from Figure 1, also be fixed with the magnetic conductor 16 of peviform in the described sonde body 11, magnet 13 is fixed in the central authorities of magnetic conductor 16 bottoms, be fixed with yoke 14 on the magnet 13, described magnetic conductor 16, magnet 13 and yoke 14 constitute closed magnetic path, and described inductive coil 12 moves in the ring-shaped groove that magnetic conductor 16 and magnet 13 constitute.The magnetic conductor 16 that adds a peviform in the present embodiment, its objective is and make magnetic conductor 16 and magnet 13 and yoke 14 constitute closed magnetic path, like this, whether no matter the existence of high-intensity magnetic field arranged on every side, to the work of sensor with and sensitivity can not exert an influence, make the working sensor state stable more, accurately.
By finding out among Fig. 3, also have on-off circuit 3 between described probe 1 and the testing circuit 2, above-mentioned three parts are electrically connected.Contain triode Q in the described on-off circuit 3
1, Q
2, capacitor C
1And resistance R
1, R
2, triode Q wherein
1Base stage and emitter be connected the two ends of inductive coil 12 respectively, and grounded emitter, its collector connects triode Q
2Base stage, triode Q
2Emitter connect power supply V
CC, resistance R
1One end connects power supply V
CC, the other end connects triode Q
2Emitter, triode Q
2Collector connection detection circuit 2, resistance R
2With capacitor C
1Back in parallel one end connects triode Q
2Collector, other end ground connection.When not testee shake-up of elasticity sensing mechanism 15, inductive coil 12 remains static, at this moment, and the output of inductive coil 12 pulse-free signals, triode Q
1Base stage and emitter between potential difference (PD) be zero, triode Q
1Be in cut-off state, so, triode Q
2Base stage is owing to there is resistance R
1Existence and be in noble potential, triode Q
2Also end, on-off circuit 3 output terminal a point output low level signals, testing circuit 2 does not start feed circuit and operating circuit, and energy consumption is lower.When testee shake-up elasticity sensing mechanism 15, inductive coil 12 produces motion and the very fast sine wave signal of decaying of output amplitude, when positive half-wave, and triode Q
1Base stage be in noble potential, triode Q
1Conducting, triode Q
2Base stage also be in electronegative potential, thereby make triode Q
2Also conducting, on-off circuit 3 output terminal a points output high level signal, testing circuit 2 begins to start feed circuit and operating circuit.When not touched by testee, testing circuit 2 does not start power supply, thereby cuts down the consumption of energy with above-mentioned micro-displacement sensor, and this micro-displacement sensor can prolong the serviceable life of battery in this micro-displacement sensor greatly, can accomplish non-maintaining basically.
Claims (6)
1. a micro-displacement sensor comprises probe (1) and testing circuit (2); Described probe (1) comprises sonde body (11), is installed on inductive coil (12) and magnet (13) in the sonde body (11); It is characterized in that:
Also include elasticity sensing mechanism (15), its fixed part (151) is fixed on the magnet (13), and detection portion (152) stretches out outside the sonde body (11);
Described magnet (13) is fixed on the sonde body (11);
Described inductive coil (12) is an air core coil, and this inductive coil is fixed on the elasticity sensing mechanism (15), and makes it place magnet (13) to form in the magnetic field;
Testee touches elasticity sensing mechanism (15), drives the motion that inductive coil (12) is done cutting magnet (13) magnetic line of force, and the magnetic flux in the inductive coil (12) changes, and produces induced electromotive force and output electric pulse signal.
2. micro-displacement sensor according to claim 1 is characterized in that: described elasticity sensing mechanism (15) comprises resiliency supported sheet (153) and sensing part (154),
Described resiliency supported sheet (153) is fixed on the magnet (13);
The stiff end of described sensing part (154) connects resiliency supported sheet (153), and end of probe is stretched out outside the sonde body (11);
Described magnet (13) is a cylinder, inductive coil (12) is enclosed within the periphery of magnet (13), testee touches the end of probe of sensing part (154), drive resiliency supported sheet (153) and produce vibration, inductive coil (12) produces vibration under resiliency supported sheet (153) screen resilience effect, magnetic flux in the inductive coil (12) changes, and produces induced electromotive force and output electric pulse signal.
3. micro-displacement sensor according to claim 1 is characterized in that: described elasticity sensing mechanism (15) is flexible rod member;
The stiff end (155) of described shaft-like elasticity sensing mechanism (15) is fixed on the magnet (13), and end of probe (156) is stretched out outside the sonde body (11);
Described magnet (13) is the opening ring-type, elasticity sensing mechanism (15) places inductive coil (12) fixing on it opening part of magnet (13), the end of probe (156) of testee elasticity sensing mechanism (15), driving the upward fixing inductive coil (12) of elasticity sensing mechanism (15) swings in the opened gap of magnet (13), magnetic flux in the inductive coil (12) changes, and produces induced electromotive force and output electric pulse signal.
4. micro-displacement sensor according to claim 2, it is characterized in that: the magnetic conductor (16) that also is fixed with peviform in the described sonde body (11), magnet (13) is fixed in the central authorities of magnetic conductor (16) bottom, be fixed with yoke (14) on the magnet (13), described magnetic conductor (16), magnet (13) and yoke (14) constitute closed magnetic path, described inductive coil (12) motion in the ring-shaped groove that magnetic conductor (16) and magnet (13) constitute.
5. according to claim 1 or 2 or 3 described micro-displacement sensors, it is characterized in that: also have on-off circuit (3) between described probe (1) and the testing circuit (2), above-mentioned three parts are electrically connected.
6. micro-displacement sensor according to claim 5 is characterized in that: described on-off circuit contains triode Q in (3)
1, Q
2, capacitor C
1And resistance R
1, R
2, triode Q wherein
1Base stage and emitter be connected the two ends of inductive coil (12) respectively, and grounded emitter, its collector connects triode Q
2Base stage; Triode Q
2Emitter connect power supply V
CC, resistance R
1One end connects power supply V
CC, the other end connects triode Q
2Emitter, triode Q
2Collector connection detection circuit (2), resistance R
2With capacitor C
1After the parallel connection, an end connects triode Q
2Collector, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03224972 CN2611870Y (en) | 2003-04-04 | 2003-04-04 | Inching motion transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03224972 CN2611870Y (en) | 2003-04-04 | 2003-04-04 | Inching motion transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2611870Y true CN2611870Y (en) | 2004-04-14 |
Family
ID=34163566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03224972 Expired - Fee Related CN2611870Y (en) | 2003-04-04 | 2003-04-04 | Inching motion transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2611870Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102572034A (en) * | 2012-02-29 | 2012-07-11 | 湘潭大学 | Mobile terminal with automatic awakening function |
| CN102797979A (en) * | 2012-08-29 | 2012-11-28 | 上海海事大学 | Device for detecting leakage points of underground pipeline and method thereof |
| CN103759062A (en) * | 2013-12-26 | 2014-04-30 | 鞍山电磁阀有限责任公司 | Multi-point magnetic valve position signal output device of nuclear safety-level electromagnetic stop valve |
-
2003
- 2003-04-04 CN CN 03224972 patent/CN2611870Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102572034A (en) * | 2012-02-29 | 2012-07-11 | 湘潭大学 | Mobile terminal with automatic awakening function |
| CN102572034B (en) * | 2012-02-29 | 2015-06-03 | 湘潭大学 | Mobile terminal with automatic awakening function |
| CN102797979A (en) * | 2012-08-29 | 2012-11-28 | 上海海事大学 | Device for detecting leakage points of underground pipeline and method thereof |
| CN102797979B (en) * | 2012-08-29 | 2014-07-02 | 上海海事大学 | Device for detecting leakage points of underground pipeline and method thereof |
| CN103759062A (en) * | 2013-12-26 | 2014-04-30 | 鞍山电磁阀有限责任公司 | Multi-point magnetic valve position signal output device of nuclear safety-level electromagnetic stop valve |
| CN103759062B (en) * | 2013-12-26 | 2016-08-31 | 鞍山电磁阀有限责任公司 | Multi-point magnetic valve position signal output device of nuclear safety-level electromagnetic stop valve |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |