CN201255640Y - Magnetic induction distance detecting device - Google Patents
Magnetic induction distance detecting device Download PDFInfo
- Publication number
- CN201255640Y CN201255640Y CNU2008200067073U CN200820006707U CN201255640Y CN 201255640 Y CN201255640 Y CN 201255640Y CN U2008200067073 U CNU2008200067073 U CN U2008200067073U CN 200820006707 U CN200820006707 U CN 200820006707U CN 201255640 Y CN201255640 Y CN 201255640Y
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- magnetic induction
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- distance detector
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- 230000006698 induction Effects 0.000 title claims description 53
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 86
- 239000010959 steel Substances 0.000 claims abstract description 86
- 230000008859 change Effects 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 abstract 3
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model relates to a magnetic sensing distance detector which comprises a magnetic conductive support, circular magnetic steel, cylindrical magnetic steel, a magnetic conductor and a magnetic sensor; the magnetic conductive support is provided with a through hole; the circular magnetic steel and the cylindrical magnetic steel are respectively adhered to the upper surface and the lower surface of the magnetic conductive support; central axes of the circular magnetic steel and the cylindrical magnetic steel are superposed with the central axis of the through hole; the magnetic conductor is arranged on an object the distance of which is to be detected and which moves along the central axis, and is in parallel with a circular plane of the circular magnetic steel; the magnetic sensor is arranged between the magnetic conductor and the through hole, so as to output the corresponding distance change signal according to the detected changes to the magnetic field intensity. The magnetic sensing distance detector can detect the distance of the object in a short distance, convert the distance signal into switch signal by setting threshold value, serve as a door switch detector of a container, and has the advantages of high sensitivity and strong reliability.
Description
Technical field
The utility model relates to a kind of distance detector, relates in particular to the magnetic induction distance detector that a kind of chamber door that is applied to survey container opens and closes situation.
Background technology
Along with the continuous development and the expansion of international trade, encased conveying because of its have advantages such as freight-transport capacity is big, transportation cost is low become countries in the world the important shipping means that extensively adopt.But in recent years,, take precautions against the awareness of safety of terrorist activity because countries in the world have generally been improved and averted risks.Various countries are more and more higher for the safety requirements of container in transportation, wherein outbalance requirement be to container in the world the full supply chain process carry out omnidistance tracking supervision, realize the overall process supervision that container is unpacked from delivery joint sealing to the payment that reaches the destination, guarantee the full safety of containerized shipment transportation, do not allow any illegal unlatching chamber door in the full supply chain process.In order to monitor the switching situation of chamber door, usually can take near the chamber door of container, to be provided with the mode of distance detector, thereby survey the distance between two fan chamber doors or the keying situation of the monitoring of the variable in distance between chamber door and doorframe chamber door by utilizing this distance detector, yet, this type of distance detector often exists detection sensitivity not high at present, the shortcoming of poor reliability, thereby can not monitor the illegal unlatching situation of system chamber door in transportation well.
Summary of the invention
Fundamental purpose of the present utility model is, provides a kind of container that can be applicable to, detection sensitivity height, good reliability and magnetic induction distance detector simple in structure.
In order to realize above-mentioned purpose, the utility model provides a kind of magnetic induction distance detector, comprise a magnetic conduction support, one annular magnetic steel, one cylindricality magnet steel, an one magnetic conduction object and a magnetic induction sensor, described magnetic conduction support is provided with through hole, described annular magnetic steel and described cylindricality magnet steel are attached to the upper and lower surface of described magnetic conduction support respectively, and described annular magnetic steel, described cylindricality magnet steel and described through hole three's axis coincides, described magnetic conduction object be arranged on can along described axis direction move to be detected apart from paralleling on the object and with the planar annular of described annular magnetic steel, described magnetic induction sensor is arranged between described magnetic conduction object and the described through hole, so that export corresponding variable in distance signal according to the variation of the magnetic field intensity that detects.
The internal diameter of described annular magnetic steel is identical with the aperture of described through hole and slightly littler than the external diameter of described cylindricality magnet steel; Described sensor is fixed on the hollow position of described annular magnetic steel, and perhaps, described sensor is fixed on the corresponding position of hollow position of the outside surface and the described annular magnetic steel of described magnetic conduction object.
The upper and lower end face of described annular magnetic steel and described cylindricality magnet steel is respectively the S utmost point and the N utmost point, and perhaps, the upper and lower end face of described annular magnetic steel and described cylindricality magnet steel is respectively the N utmost point and the S utmost point.
Also be set with the magnetic field intensity threshold values in the described magnetic induction sensor, be converted to switching signal after described magnetic field intensity that described magnetic induction sensor will receive and described threshold values compare.
Described sensor measuring unit is a linear hall sensor.
The utility model also provides a kind of magnetic induction distance detector, comprise a magnetic conduction support, one annular magnetic steel, an one cylindricality magnet steel and a magnetic induction sensor, described magnetic conduction support is provided with through hole, described annular magnetic steel and described cylindricality magnet steel are attached to the upper and lower surface of described magnetic conduction support respectively, and described annular magnetic steel, described cylindricality magnet steel and described through hole three's axis coincides, described magnetic induction sensor is arranged on to be detected apart from the object, to be detectedly move along described axis direction apart from object according to described, described magnetic induction sensor is surveyed the variation of magnetic field intensity to obtain corresponding variable in distance signal.
The internal diameter of described annular magnetic steel is identical with the aperture of described through hole and slightly littler than the external diameter of described cylindricality magnet steel; Described magnetic induction sensor is fixed on the corresponding position of hollow position of described outside surface and described annular magnetic steel apart from object to be detected.
The upper and lower end face of described annular magnetic steel and described cylindricality magnet steel is respectively the S utmost point and the N utmost point, and perhaps, the upper and lower end face of described annular magnetic steel and described cylindricality magnet steel is respectively the N utmost point and the S utmost point.
Also be set with the magnetic field intensity threshold values in the described magnetic induction sensor, be converted to switching signal after described magnetic field intensity that described magnetic induction sensor will receive and described threshold values compare.
Described sensor measuring unit is a linear hall sensor.
The utlity model has following beneficial effect, magnetic induction distance detector of the present utility model can be realized short-range object distance is surveyed by the variation of surveying magnetic field intensity, also can distance signal be converted to switching signal by setting threshold values, so the door switch sniffer of used as container has the advantage of highly sensitive and good reliability.
Description of drawings
Fig. 1 is the three-dimensional exploded view of magnetic induction distance detector embodiment one of the present utility model;
Fig. 2 is the structural representation of the mounting means one of magnetic induction distance detector embodiment two of the present utility model;
Fig. 3 is the structural representation of the mounting means two of magnetic induction distance detector embodiment two of the present utility model.
Embodiment
Magnetic induction distance detector 1 of the present utility model can match to be applied to the door opening or closing situation of monitoring containers apart from object 2 with to be detected.In order to further specify principle of the present utility model and structure, now in conjunction with the accompanying drawings preferred embodiment of the present utility model is elaborated.
Embodiment one: see also shown in Figure 1ly, magnetic induction distance detector 1 of the present utility model comprises a magnetic conduction support 11, an annular magnetic steel 12, a cylindricality magnet steel 13 and a magnetic induction sensor 14.
This magnetic conduction support 11 is one to be flat structure by what permeability magnetic material was made, as irony magnetic conduction support etc., have a through hole 111 on this magnetic conduction support 11, and having a counterbore in the position that this magnetic conduction support 11 is positioned at these through hole 111 bottoms, the aperture of this counterbore is slightly larger than the aperture of this through hole 111 and coincide with the axis of this through hole 111 (can in conjunction with consulting Fig. 2 to shown in Figure 3).
The integral body of this annular magnetic steel 12 is circular, and its internal diameter is best identical with the aperture of this through hole 111, and the magnetic direction (being magnetization direction) of dashing of this annular magnetic steel 12 is and the perpendicular direction of its planar annular.
The integral body of this cylindricality magnet steel 13 is cylindric, and its external diameter is identical with the aperture of this counterbore, and the magnetic direction of dashing of this cylindricality magnet steel 13 is and the perpendicular direction in cylinder upper and lower end face.This annular magnetic steel 12 attaches and is installed on the upper surface of this magnetic conduction support 11, the top of this cylindricality magnet steel 13 is embedded in this counterbore of these magnetic conduction support 11 lower surfaces, and make this annular magnetic steel 12, this cylindricality magnet steel 13 and this through hole 111 threes' axis coincide, and the upper and lower end face of this annular magnetic steel 12 and this cylindricality magnet steel 13 is respectively the S utmost point and the N utmost point, and perhaps the upper and lower end face of this annular magnetic steel 12 and this cylindricality magnet steel 13 is respectively the N utmost point and the S utmost point.
The circuit conversion unit (not shown) that this magnetic induction sensor 14 comprises sensor measuring unit 141 and is attached thereto.This sensor measuring unit 141 is a Hall element, it is fixed on this outside surface and the mutually corresponding position of the hollow position of this annular magnetic steel 12 apart from object 2 to be detected, and this Hall element can be CS49E, SS49E, SS59ET series linear hall sensor etc.This Hall element inside is provided with Hall element, when Hall element is placed magnetic field, because the two ends of the effect Hall element of Hall effect can produce certain electromotive force, the size of this generation electromotive force can change to some extent according to the difference of magnetic field intensity of living in, thereby changes from the output voltage of the output terminal of this sensor measuring unit 141.Be set with a magnetic field intensity threshold values in this circuit conversion unit, this circuit conversion unit receive the output voltage values of this sensor measuring unit 141 and this output voltage values and this threshold values compared after be converted to switching signal.
Detection principle is as follows: because the stack in the magnetic field that this annular magnetic steel 12 and this cylindricality magnet steel 13 produce respectively, the magnetic field intensity at the hollow position place of this annular magnetic steel 12 is approximately zero, and surrounding magnetic field intensity is bigger.When this relative position apart from object 2 and this magnetic induction distance detector 1 to be detected changes, the magnetic field intensity at these 141 residing these annular magnetic steel 12 hollow position places, sensor measuring unit changes, and cause the output voltage of this sensor measuring unit 141 to change, and then distance signal or switching signal that the circuit conversion unit that links to each other with this sensor measuring unit 141 produces change.
Embodiment two: see also Fig. 2 to shown in Figure 3, magnetic induction distance detector 1 in the present embodiment and the structure of embodiment one same section are at this repeated description no longer, its difference is, this magnetic induction distance detector 1 also comprises a magnetic conduction object 15, this magnetic conduction object 15 is made by permeability magnetic material, it is arranged on, and this is to be detected apart from the object 2, and moves apart from the axis direction of object 2 along this cylindricality magnet steel 13 along with this is to be detected.
The mounting means one of this sensor measuring unit 141: this sensor measuring unit 141 is fixed on this magnetic conduction object 15, and this installation site is mutually corresponding with the hollow position of this annular magnetic steel 12, the detection plane of this sensor measuring unit 141 is parallel with the planar annular of this annular magnetic steel 12, sees also shown in Figure 2.
Detection principle is as follows: when this is to be detected when changing apart from the distance between object 2 and this magnetic induction distance detector 1, because the two combined action of the change of the position in magnetic field of living in and the interference in these 15 pairs of magnetic fields of magnetic conduction object, the magnetic field intensity of these 141 present positions, sensor measuring unit changes, and cause the output voltage of this sensor measuring unit 141 to change, and then distance signal or switching signal that this circuit conversion unit that links to each other with this sensor measuring unit 141 produces change.
The mounting means two of this sensor measuring unit 141: the component parts of this magnetic induction distance detector 1 is identical with embodiment two, different is the installation site of this sensor measuring unit 141, in the present embodiment, this sensor measuring unit 141 is fixed in the hollow position of described annular magnetic steel 13, sees also shown in Figure 3.
Detection principle is as follows: when this is to be detected when changing apart from the distance between object 2 and this magnetic induction distance detector 1, because the influence that the interference in these 15 pairs of magnetic fields of magnetic conduction object produces, the magnetic field intensity of these 141 present positions, sensor measuring unit changes, and cause the output voltage of sensor measuring unit 141 to change, and then distance signal or switching signal that this circuit conversion unit that links to each other with sensor measuring unit 141 produces change.
When the magnetic induction distance detector 1 of the foregoing description one and embodiment two is applied to survey the door opening or closing situation of container, the remainder of this magnetic induction distance detector 1 except this sensor measuring unit 141 can be installed on the doorframe or a side chamber door of container, and this opposite side chamber door that is this container apart from object 2 to be detected.When chamber door takes place to open, relative position between chamber door and the doorframe (or opposite side chamber door) changes, so the magnetic field intensity of these 141 present positions, sensor measuring unit changes, so the magnitude of voltage that this circuit conversion unit receives changes, after the threshold value of this magnitude of voltage and this circuit conversion unit inner setting compared, a chamber door start signal is exported in this circuit conversion unit, can monitor the illegal unlatching situation of chamber door in view of the above.
Magnetic induction distance detector 1 of the present utility model can be realized short-range object distance is surveyed by the variation of surveying magnetic field intensity, also can distance signal be converted to switching signal by setting threshold values, so the door switch sniffer of used as container has the advantage of highly sensitive and good reliability.
Yet; the above only is a preferable possible embodiments of the present utility model; and unrestricted protection domain of the present utility model, so the equivalent structure that all utilization the utility model instructionss and accompanying drawing content have been done changes, all be included in the protection domain of the present utility model.
Claims (10)
1. magnetic induction distance detector, it is characterized in that, comprise a magnetic conduction support, one annular magnetic steel, one cylindricality magnet steel, an one magnetic conduction object and a magnetic induction sensor, described magnetic conduction support is provided with through hole, described annular magnetic steel and described cylindricality magnet steel are attached to the upper and lower surface of described magnetic conduction support respectively, and described annular magnetic steel, described cylindricality magnet steel and described through hole three's axis coincides, described magnetic conduction object be arranged on can along described axis direction move to be detected apart from paralleling on the object and with the planar annular of described annular magnetic steel, described magnetic induction sensor is arranged between described magnetic conduction object and the described through hole, so that export corresponding variable in distance signal according to the variation of the magnetic field intensity that detects.
2. magnetic induction distance detector according to claim 1 is characterized in that, the internal diameter of described annular magnetic steel is identical with the aperture of described through hole and slightly littler than the external diameter of described cylindricality magnet steel; Described sensor is fixed on the hollow position of described annular magnetic steel, and perhaps, described sensor is fixed on the corresponding position of hollow position of the outside surface and the described annular magnetic steel of described magnetic conduction object.
3. magnetic induction distance detector according to claim 1, it is characterized in that, the upper and lower end face of described annular magnetic steel and described cylindricality magnet steel is respectively the S utmost point and the N utmost point, and perhaps, the upper and lower end face of described annular magnetic steel and described cylindricality magnet steel is respectively the N utmost point and the S utmost point.
4. according to the arbitrary described magnetic induction distance detector of claim 1 to 3, it is characterized in that, also be set with the magnetic field intensity threshold values in the described magnetic induction sensor, be converted to switching signal after described magnetic field intensity that described magnetic induction sensor will receive and described threshold values compare.
5. magnetic induction distance detector according to claim 4 is characterized in that, described sensor measuring unit is a linear hall sensor.
6. magnetic induction distance detector, it is characterized in that, comprise a magnetic conduction support, one annular magnetic steel, an one cylindricality magnet steel and a magnetic induction sensor, described magnetic conduction support is provided with through hole, described annular magnetic steel and described cylindricality magnet steel are attached to the upper and lower surface of described magnetic conduction support respectively, and described annular magnetic steel, described cylindricality magnet steel and described through hole three's axis coincides, described magnetic induction sensor is arranged on to be detected apart from the object, to be detectedly move along described axis direction apart from object according to described, described magnetic induction sensor is surveyed the variation of magnetic field intensity to obtain corresponding variable in distance signal.
7. magnetic induction distance detector according to claim 6 is characterized in that, the internal diameter of described annular magnetic steel is identical with the aperture of described through hole and slightly littler than the external diameter of described cylindricality magnet steel; Described magnetic induction sensor is fixed on the corresponding position of hollow position of described outside surface and described annular magnetic steel apart from object to be detected.
8. magnetic induction distance detector according to claim 6, it is characterized in that, the upper and lower end face of described annular magnetic steel and described cylindricality magnet steel is respectively the S utmost point and the N utmost point, and perhaps, the upper and lower end face of described annular magnetic steel and described cylindricality magnet steel is respectively the N utmost point and the S utmost point.
9. according to the arbitrary described magnetic induction distance detector of claim 6 to 8, it is characterized in that, also be set with the magnetic field intensity threshold values in the described magnetic induction sensor, be converted to switching signal after described magnetic field intensity that described magnetic induction sensor will receive and described threshold values compare.
10. magnetic induction distance detector according to claim 9 is characterized in that, described sensor measuring unit is a linear hall sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200067073U CN201255640Y (en) | 2008-02-19 | 2008-02-19 | Magnetic induction distance detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200067073U CN201255640Y (en) | 2008-02-19 | 2008-02-19 | Magnetic induction distance detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201255640Y true CN201255640Y (en) | 2009-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200067073U Expired - Lifetime CN201255640Y (en) | 2008-02-19 | 2008-02-19 | Magnetic induction distance detecting device |
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| Country | Link |
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| CN (1) | CN201255640Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514907B (en) * | 2008-02-19 | 2010-11-10 | 中国国际海运集装箱(集团)股份有限公司 | Magnetic induction distance detector |
| CN106949826A (en) * | 2015-09-25 | 2017-07-14 | 通用电气公司 | Recognize the wheel phyllomorphosis in turbine |
-
2008
- 2008-02-19 CN CNU2008200067073U patent/CN201255640Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101514907B (en) * | 2008-02-19 | 2010-11-10 | 中国国际海运集装箱(集团)股份有限公司 | Magnetic induction distance detector |
| CN106949826A (en) * | 2015-09-25 | 2017-07-14 | 通用电气公司 | Recognize the wheel phyllomorphosis in turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090610 Effective date of abandoning: 20080219 |