CN105469608A - Geomagnetic vehicle detector - Google Patents

Geomagnetic vehicle detector Download PDF

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Publication number
CN105469608A
CN105469608A CN201510994656.4A CN201510994656A CN105469608A CN 105469608 A CN105469608 A CN 105469608A CN 201510994656 A CN201510994656 A CN 201510994656A CN 105469608 A CN105469608 A CN 105469608A
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CN
China
Prior art keywords
positioning
shell body
positioning table
positioning port
inner housing
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Granted
Application number
CN201510994656.4A
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Chinese (zh)
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CN105469608B (en
Inventor
刘向东
葛顺利
蔡珍珍
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Mai Rui Data (beijing) Co Ltd
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Mai Rui Data (beijing) Co Ltd
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Priority to CN201510994656.4A priority Critical patent/CN105469608B/en
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Publication of CN105469608B publication Critical patent/CN105469608B/en
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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/01Detecting movement of traffic to be counted or controlled
    • G08G1/042Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/0026Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
    • H05K5/0047Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB
    • H05K5/0052Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB characterized by joining features of the housing parts
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/0026Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units
    • H05K5/0047Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB
    • H05K5/0056Casings, cabinets or drawers for electric apparatus provided with connectors and printed circuit boards [PCB], e.g. automotive electronic control units having a two-part housing enclosing a PCB characterized by features for protecting electronic components against vibration and moisture, e.g. potting, holders for relatively large capacitors
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/06Hermetically-sealed casings
    • H05K5/066Hermetically-sealed casings sealed by fusion of the joining parts without bringing material; sealed by brazing

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Traffic Control Systems (AREA)

Abstract

The invention relates to a geomagnetic vehicle detector which specifically comprises a PCBA, a battery, a support and a shell, wherein the shell comprises a shell body and a shell cover, the shell body comprises an inner shell body and an outer shell body, the inner shell body is a square shell body, and the side wall of the outer shell body is a cylindrical ring which encloses the upper end of the inner shell body; the top part of the inner shell body is lower than the top part of the outer shell body, and the bottom face of the outer shell body is connected to the bottom end of the side wall of the outer shell body and the side wall of the inner shell body; the shell cover comprises an inner cover and an outer cover; the bottom face edge of the inner cover and the side wall top face of the inner shell body are welded to form an inner sealing chamber, and the support fixes the PCBA and the battery inside the inner sealing chamber; and the bottom face edge of the outer cover and the side wall top face of the outer shell body are welded to from an outer sealing chamber. The geomagnetic vehicle detector provided by the invention can improve waterproof performance and detection accuracy of the geomagnetic vehicle detector as well as impact resistance of the shell body.

Description

A kind of earth magnetism wagon detector
Technical field
The present invention relates to intelligent transportation field, especially a kind of earth magnetism wagon detector.
Background technology
Intelligent transportation system (ITS, IntelligentTransportationSystem), by the integrated whole ground traffic control system that applies to effectively such as the infotech of advanced person, data communication transmission technology, Electronic transducer technology, control technology and computer technology, can on a large scale, comprehensive performance in real time, composite communications transport management role accurately and efficiently.Composite communications transport management specifically comprises public transport management, commercial car operation management, trip requirements management, emergency traffic management, wagon control and safety management etc., and vehicle detecting system is then the data basis that ITS realizes composite communications transport management.
Vehicle detecting system is divided into two classes according to the type of wagon detector: based on the vehicle detecting system of fixed vehicle detecting device, and based on the vehicle detecting system of moving vehicle detecting device.For the vehicle detecting system based on fixed vehicle detecting device, each track of road network is distributed under some class wagon detector needs to be fixedly installed on road surface, such as, earth magnetism wagon detector, such laying feature makes vehicle equipment incessantly need to solve and install checkout equipment and can damage the problems such as road surface, difficulty of construction are large, working environment severe under also needing to consider road surface is for the impact of wagon detector, and especially humidity is for the impact of wagon detector.
Concrete, earth magnetism wagon detector is generally embedded in urban road upper strata, urban road upper strata mostly is pitch cement gravel or concrete material is laid, these properties of materials not easily seep water after solidifying, but the water infiltered not easily evaporates discharge, cause the working environment of earth magnetism wagon detector moist for a long time, at the time earth magnetism wagon detector of rainy, many snow or even under water, thus waterproof is one of necessary performance of earth magnetism wagon detector.
At present, usually water-tight is realized by arranging O-ring seal between the housing and cap of earth magnetism wagon detector shell.But when vehicle crosses above earth magnetism wagon detector, magnetic vehicle detecting device produces horizontal forward impulsive force and downward pressure over the ground, the seam crossing of housing and enclosing cover is out of shape, and then cause seal failure to seep water, the earth magnetism wagon detector that takes place frequently in practice leaks and causes the assembling printed circuit board (PCB) (PCBA of detecting device, printedcircuitboardassembly) damage event also demonstrates this point, visible, and aforementioned seal structure can not the waterproof demand of magnetic vehicle detecting device contentedly.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of earth magnetism wagon detector, can improve the water resistance of earth magnetism wagon detector, detection accuracy, and housing impact resistance.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of earth magnetism wagon detector, comprising: assembling printing board PCB A, battery, support and shell; Shell comprises housing and cap,
Described housing comprises inner housing and shell body, and inner housing is square casing, and shell body sidewall is cylindrical ring, surrounds inner housing upper end; Inner housing top lower than shell body top, connected with outer casing body sidewall bottom, shell body bottom surface and inner housing sidewall;
Described cap comprises inner cap and enclosing cover; Inner cap bottom edge is welded with the sidewall end face of inner housing and is formed interior annular seal space, and described PCBA and battery are fixed in interior annular seal space by described support; Enclosing cover bottom edge is welded with the sidewall end face of shell body and is formed external seal chamber.
Further, four ribs of described inner housing upper end are connected with shell body sidewall respectively, and going out four xsects in inner housing sidewall, shell body sidewall spacers is arc space; Reinforcement is provided with in each described arcuate space.
Further, outside is provided with set square reinforcement, and two right-angle side place square faces of this set square reinforcement connect described inner housing lower end sidewall and shell body bottom surface respectively.
Further, ultrasonic soldering is welded as described in.
Further, there is annular protrusion described inner cap bottom surface; This annular protrusion is pressed in described housing, arranges O-ring seal seal with case inside joining place.
Further, there is netted reinforcing rib in the region on described inner cap bottom surface within annular protrusion.
Further, there is netted reinforcing rib described inner housing bottom surface.
Further, there is the reinforcement of hexagonal honeycomb shape structure described enclosing cover bottom surface except welding region.
Further, described PCBA mono-jiao is provided with the first positioning port/the first positioning table, and one jiao, described support is provided with the first positioning table/the first positioning port, and this first positioning table embeds the first positioning port, and PCBA is fixed on support by the flexible clamp piece on support; Described support side is provided with the second positioning table one, opposite side second positioning table two, inner housing side wall inner surfaces is provided with the second positioning port one and the second positioning port two, this second positioning table one embeds the second positioning port one, and this second positioning table two embeds the second positioning port two; Accordingly,
Described shell body sidewall top is provided with the 3rd positioning port/the 3rd positioning table, the x-axis positive dirction of geomagnetic sensor on the PCBA that the 3rd positioning port/the 3rd positioning table mark is fixed on described interior annular seal space; Cover in described and be provided with the 3rd positioning table/the 3rd positioning port, when inner cap is fixed on inner housing, the 3rd positioning table embeds the 3rd positioning port; Accordingly,
When described enclosing cover is fixed on shell body, the direction of arrow points the 3rd positioning port/the 3rd positioning table mark of outer hd top face.
Further, described PCBA mono-jiao is provided with the first positioning port/the first positioning table, and one jiao, described support is provided with the first positioning table/the first positioning port, and this first positioning table embeds the first positioning port, and PCBA is fixed on support by the flexible clamp piece on support; Described support side is provided with the second positioning table one, opposite side second positioning table two, inner housing side wall inner surfaces is provided with the second positioning port one and the second positioning port two, this second positioning table one embeds the second positioning port one, and this second positioning table two embeds the second positioning port two; Accordingly,
Described shell body sidewall top is provided with the 3rd positioning port/the 3rd positioning table, the y-axis positive dirction of geomagnetic sensor on the PCBA that the 3rd positioning port/the 3rd positioning table mark is fixed on described interior annular seal space; Cover in described and be provided with the 3rd positioning table/the 3rd positioning port, when inner cap is fixed on inner housing, the 3rd positioning table embeds the 3rd positioning port; Accordingly,
When described enclosing cover is fixed on shell body, the direction of arrow points the 3rd positioning port/the 3rd positioning table mark of outer hd top face.
Based on above-mentioned, earth magnetism wagon detector provided by the invention, has the following advantages and feature:
1, adopt double-layer seal chamber sealing PCBA and battery, and external seal chamber surrounds interior annular seal space, substantially increases water resistance; Inner housing only upper end is the housing sidewall encirclement of the outer shape of cylindrical ring, on the one hand, reduces the impact resistance enhancing shell, on the other hand, avoids earth magnetism wagon detector and install and use middle rotation, improve the accuracy of earth magnetism wagon detector;
2, four ribs of inner housing upper end are connected with shell body sidewall respectively, all arrange reinforcement in arcuate space, outside arranges set square reinforcement, add housing physical strength, reduce the possibility of shell breakage infiltration, and then improve water resistance;
3, O-ring seal is set between inner cap and inner housing sidewall, add a heavy waterproof measure, and the weld of inner cap and inner housing sidewall, inner cap impulsive force when all not rolling by vehicle itself and the impact of pressure, avoid impulsive force when vehicle rolls and pressure causes sealed ring deformation, and then cause seal failure to ooze water problem, improve water resistance;
4, triple waterproof, and arbitrary heavy or double seepage all can not affect the waterproof efficacy of residue waterproof construction, greatly reduces risk of leakage, improves water resistance;
5, the reinforcement that the region on inner cap bottom surface within annular protrusion arranges netted reinforcing rib, inner housing bottom surface arranges netted reinforcing rib, enclosing cover bottom surface arranges hexagonal honeycomb shape structure except welding region, strengthen the physical strength of earth magnetism wagon detector shell corresponding site, reduce the possibility of shell breakage infiltration, and then improve water resistance;
6, mate with the first positioning table/the first positioning port of first positioning port/the first positioning table of PCBA mono-jiao and one jiao, support, second positioning table one of support side and the second positioning port one of housing sidewall mate, second positioning table two of support opposite side and the second positioning port two of housing sidewall mate, 3rd positioning port/the 3rd positioning table of inner housing sidewall and the 3rd positioning table of inner cap/the 3rd positioning port coupling, and the arrow points of enclosing cover is mated with the 3rd positioning table/the 3rd positioning port, ensure the direction of traffic defined in the arrow points earth magnetism wagon detector algorithm of enclosing cover during assembling, reach 3 grades of mistake proofings,
7, the direction of traffic defined in shell subscript note earth magnetism wagon detector algorithm, facilitates during erecting equipment and makes the direction of traffic of this definition consistent with actual direction of traffic.
Accompanying drawing explanation
Fig. 1 is the fractionation structural representation of embodiment of the present invention earth magnetism wagon detector.
Embodiment
Basic thought of the present invention is: adopt double-layer seal chamber sealing PCBA and battery, substantially increase water resistance, and external seal chamber surrounds interior annular seal space, the impulsive force when weld of protection inner cap and inside sidewalls does not roll by vehicle and the impact of pressure, further increase water resistance, inner housing only upper end is the shell body side walls enclose of the outer shape of cylindrical ring, on the one hand, impulsive force when cylindrical shell body reduces that suffered by shell, vehicle rolls, namely the impulsive force reduced when vehicle rolls destroys the possibility of shell, enhance the impact resistance at the relatively weak place of intensity of shell, namely the impact resistance of whole shell is enhanced, on the other hand, spot magnetic vehicle detecting device is avoided to install and use middle rotation, make the situation that the direction of traffic that defines in earth magnetism wagon detector algorithm and actual direction of traffic stagger, and then avoid the inaccurate problem of vehicle detection that this situation causes, improve the accuracy of earth magnetism wagon detector.
Concrete, the fractionation structure of embodiment of the present invention earth magnetism wagon detector as shown in Figure 1, comprising: PCBA1, battery 2, support 3 and shell 4; Shell 4 comprises housing 41 and cap 42, it is characterized in that,
Described housing 41 comprises inner housing 411 and shell body 412, and inner housing 411 is square casing, and shell body 412 sidewall is cylindrical ring, surrounds inner housing 411 upper end; Inner housing 411 top lower than shell body 412 top, connected with outer casing body 412 sidewall bottom, shell body 412 bottom surface and inner housing 411 sidewall;
Described cap 42 comprises inner cap 421 and enclosing cover 422; Inner cap 421 bottom edge is welded with the sidewall end face of inner housing 411 and is formed interior annular seal space, and PCBA1 and battery 2 are fixed in interior annular seal space by described support 3; Enclosing cover 422 bottom edge is welded with the sidewall end face of shell body 412 and is formed external seal chamber.Wherein,
Four ribs of described inner housing 411 upper end are connected with shell body 412 sidewall respectively, and going out four xsects in inner housing 411 sidewall, shell body 412 sidewall spacers is arc space; Reinforcement is provided with in each described arcuate space.
Described housing 41 outer setting has set square reinforcement 413, and two right-angle side place square faces of this set square reinforcement 413 connect described inner housing 411 lower end sidewall and shell body 412 bottom surface respectively.
Describedly be welded as ultrasonic soldering, that is, the sidewall end face of inner cap 421 bottom edge or inner housing 411 adopts the mode of ultrasonic soldering to weld together, and sealing wire can be arranged at the sidewall end face of inner cap 421 bottom edge or inner housing 411; The sidewall end face of enclosing cover 422 bottom edge and shell body 412 adopts the mode of ultrasonic soldering to weld together, and sealing wire can be arranged at the sidewall end face of enclosing cover 422 bottom edge or shell body 412.Sealing wire be designed to prior art, repeat no more herein.
There is annular protrusion described inner cap 421 bottom surface; This annular protrusion is pressed in described inner housing 411, arranges O-ring seal seal with joining place inside inner housing 411.Wherein, O-ring seal waterproofing design is prior art, repeats no more herein.
Here, the sidewall end face of inner housing 411 is lower than the sidewall end face of shell body 412, and then make external seal chamber surround the inner cap 421 of interior annular seal space, and the weld of the sidewall end face of inner cap 421 and inner housing 411, make vehicle through the weld of out-of-date impact force action at enclosing cover and side-wall outer side end face 411, outer and the enclosing cover of housing sidewall, pressure then directly acts on outer covering, the impulsive force when weld protecting inner cap and inside sidewalls does not roll by vehicle and the impact of pressure, greatly reduce the possibility that vehicular impact causes interior annular seal space to damage, and the impulsive force avoided when vehicle rolls and pressure cause the sealed ring deformation between inner cap 421 and inner housing 411 sidewall, and then cause seal failure to ooze water problem, substantially increase water resistance.And, when proper use of embodiment of the present invention earth magnetism wagon detector, generally can not spot magnetic vehicle detector housing housing/cap situation of breaking, and outside this situation, above-mentioned triple waterproofing design, arbitrary heavy or double seepage all can not affect the waterproof efficacy of residue waterproof construction, greatly reduces risk of leakage, improves water resistance.
There is netted reinforcing rib in region on described inner cap 421 bottom surface within annular protrusion.
There is netted reinforcing rib described inner housing 411 bottom surface.
There is the reinforcement of hexagonal honeycomb shape structure described enclosing cover 422 bottom surface except welding region.
Above-mentioned reinforcement can the physical strength of magnetic vehicle detector housing corresponding site intentinonally, reduces the possibility of shell breakage infiltration, and then improves water resistance.
The mistake proofing design that embodiment of the present invention earth magnetism wagon detector also includes assembling, installs, concrete,
When the direction of traffic defined in embodiment of the present invention earth magnetism wagon detector algorithm is the x-axis positive dirction of geomagnetic sensor on PCBA1, assembling, the mistake proofing of installing design specific as follows:
Described PCBA1 mono-jiao is provided with the first positioning port, and 3 one jiaos, described support is provided with the first positioning table, and this first positioning table embeds the first positioning port, and PCBA1 is fixed on support by the flexible clamp piece on support 3; Described support 3 side is provided with the second positioning table one, opposite side second positioning table two, inner housing 411 side wall inner surfaces is provided with the second positioning port one and the second positioning port two, this second positioning table one embeds the second positioning port one, and this second positioning table two embeds the second positioning port two; Accordingly,
Described shell body 412 sidewall top is provided with the 3rd positioning port, the x-axis positive dirction of geomagnetic sensor on the PCBA1 that the 3rd positioning port mark is fixed on described interior annular seal space; Described inner cap 421 is provided with the 3rd positioning table, when inner cap 421 is fixed on inner housing 411, the 3rd positioning table embeds the 3rd positioning port; Accordingly,
When described enclosing cover 422 is fixed on shell body 412, the direction of arrow points the 3rd positioning port mark of enclosing cover 422 end face.Or,
Described PCBA1 mono-jiao is provided with the first positioning table, and 3 one jiaos, described support is provided with the first positioning port, and this first positioning table embeds the first positioning port, and PCBA1 is fixed on support by the flexible clamp piece on support 3; Described support 3 side is provided with the second positioning table one, opposite side second positioning table two, inner housing 411 side wall inner surfaces is provided with the second positioning port one and the second positioning port two, this second positioning table one embeds the second positioning port one, and this second positioning table two embeds the second positioning port two; Accordingly,
Described shell body 412 sidewall top is provided with the 3rd positioning table, the x-axis positive dirction of geomagnetic sensor on the PCBA1 that the 3rd positioning table mark is fixed on described interior annular seal space; Described inner cap 421 is provided with the 3rd positioning port, when inner cap 421 is fixed on inner housing 411, the 3rd positioning table embeds the 3rd positioning port; Accordingly,
When described enclosing cover 422 is fixed on shell body 412, the direction of arrow points the 3rd positioning table mark of enclosing cover 422 end face.
When the direction of traffic defined in embodiment of the present invention earth magnetism wagon detector algorithm is the y-axis positive dirction of geomagnetic sensor on PCBA1, assembling, the mistake proofing of installing design specific as follows:
Described PCBA1 mono-jiao is provided with the first positioning port, and 3 one jiaos, described support is provided with the first positioning table, and this first positioning table embeds the first positioning port, and PCBA1 is fixed on support by the flexible clamp piece on support 3; Described support 3 side is provided with the second positioning table one, opposite side second positioning table two, inner housing 411 side wall inner surfaces is provided with the second positioning port one and the second positioning port two, this second positioning table one embeds the second positioning port one, and this second positioning table two embeds the second positioning port two; Accordingly,
Described shell body 412 sidewall top is provided with the 3rd positioning port, the y-axis positive dirction of geomagnetic sensor on the PCBA1 that the 3rd positioning port mark is fixed on described interior annular seal space; Described inner cap 421 is provided with the 3rd positioning table, when inner cap 421 is fixed on inner housing 411, the 3rd positioning table embeds the 3rd positioning port; Accordingly,
When described enclosing cover 422 is fixed on shell body 412, the direction of arrow points the 3rd positioning port mark of enclosing cover 422 end face.Or,
Described PCBA1 mono-jiao is provided with the first positioning table, and 3 one jiaos, described support is provided with the first positioning port, and this first positioning table embeds the first positioning port, and PCBA1 is fixed on support by the flexible clamp piece on support 3; Described support 3 side is provided with the second positioning table one, opposite side second positioning table two, inner housing 411 side wall inner surfaces is provided with the second positioning port one and the second positioning port two, this second positioning table one embeds the second positioning port one, and this second positioning table two embeds the second positioning port two; Accordingly,
Described shell body 412 sidewall top is provided with the 3rd positioning table, the y-axis positive dirction of geomagnetic sensor on the PCBA1 that the 3rd positioning table mark is fixed on described interior annular seal space; Described inner cap 421 is provided with the 3rd positioning port, when inner cap 421 is fixed on inner housing 411, the 3rd positioning table embeds the 3rd positioning port; Accordingly,
When described enclosing cover 422 is fixed on shell body 412, the direction of arrow points the 3rd positioning table mark of enclosing cover 422 end face.
Above-described embodiment is assembled, installation mistake proofing principle is as follows:
During assembling earth magnetism wagon detector, all according to assembling sequence, first PCBA1 is fixed on support 3, afterwards support 1 is fixed in inner housing 411, weld inner cap 421 again, finally weld enclosing cover 422, and when assembling complete, the direction of traffic desirably defined in magnetic vehicle detector algorithm, be generally x or the y-axis positive dirction of geomagnetic sensor on PCBA1, consistent with the arrow points of enclosing cover 422, first positioning port/the first positioning table of above-described embodiment by PCBA1 mono-jiao and the first positioning table/the first positioning port coupling of 3 one jiaos, support, second positioning table one of support 3 side and the second positioning port one of inner housing 411 sidewall mate, second positioning table two of support 3 opposite side and the second positioning port two of inner housing 411 sidewall mate, 3rd positioning port/the 3rd positioning table of shell body 412 sidewall and the 3rd positioning table of inner cap 421/the 3rd positioning port coupling, until the arrow points being passed to enclosing cover 422 is mated with the 3rd positioning table/the 3rd positioning port, ensure the direction of traffic defined in the arrow points earth magnetism wagon detector algorithm of enclosing cover 422 during assembling, namely can by design coupling during assembling, the direction of traffic defined in the arrow points earth magnetism wagon detector algorithm of enclosing cover during assembling can have been ensured, reach 3 grades of mistake proofings.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.

Claims (10)

1. an earth magnetism wagon detector, comprising: assembling printing board PCB A, battery, support and shell; Shell comprises housing and cap, it is characterized in that,
Described housing comprises inner housing and shell body, and inner housing is square casing, and shell body sidewall is cylindrical ring, surrounds inner housing upper end; Inner housing top lower than shell body top, connected with outer casing body sidewall bottom, shell body bottom surface and inner housing sidewall;
Described cap comprises inner cap and enclosing cover; Inner cap bottom edge is welded with the sidewall end face of inner housing and is formed interior annular seal space, and described PCBA and battery are fixed in interior annular seal space by described support; Enclosing cover bottom edge is welded with the sidewall end face of shell body and is formed external seal chamber.
2. earth magnetism wagon detector according to claim 1, is characterized in that, four ribs of described inner housing upper end are connected with shell body sidewall respectively, and going out four xsects in inner housing sidewall, shell body sidewall spacers is arc space; Reinforcement is provided with in each described arcuate space.
3. earth magnetism wagon detector according to claim 1 and 2, is characterized in that, outside is provided with set square reinforcement, and two right-angle side place square faces of this set square reinforcement connect described inner housing lower end sidewall and shell body bottom surface respectively.
4. earth magnetism wagon detector according to claim 1 and 2, is characterized in that, described in be welded as ultrasonic soldering.
5. earth magnetism wagon detector according to claim 1 and 2, is characterized in that, there is annular protrusion described inner cap bottom surface; This annular protrusion is pressed in described housing, arranges O-ring seal seal with case inside joining place.
6. earth magnetism wagon detector according to claim 5, is characterized in that, there is netted reinforcing rib in the region on described inner cap bottom surface within annular protrusion.
7. earth magnetism wagon detector according to claim 1 and 2, is characterized in that, there is netted reinforcing rib described inner housing bottom surface.
8. earth magnetism wagon detector according to claim 1 and 2, is characterized in that, there is the reinforcement of hexagonal honeycomb shape structure described enclosing cover bottom surface except welding region.
9. earth magnetism wagon detector according to claim 1 and 2, it is characterized in that, described PCBA mono-jiao is provided with the first positioning port/the first positioning table, one jiao, described support is provided with the first positioning table/the first positioning port, this first positioning table embeds the first positioning port, and PCBA is fixed on support by the flexible clamp piece on support; Described support side is provided with the second positioning table one, opposite side second positioning table two, inner housing side wall inner surfaces is provided with the second positioning port one and the second positioning port two, this second positioning table one embeds the second positioning port one, and this second positioning table two embeds the second positioning port two; Accordingly,
Described shell body sidewall top is provided with the 3rd positioning port/the 3rd positioning table, the x-axis positive dirction of geomagnetic sensor on the PCBA that the 3rd positioning port/the 3rd positioning table mark is fixed on described interior annular seal space; Cover in described and be provided with the 3rd positioning table/the 3rd positioning port, when inner cap is fixed on inner housing, the 3rd positioning table embeds the 3rd positioning port; Accordingly,
When described enclosing cover is fixed on shell body, the direction of arrow points the 3rd positioning port/the 3rd positioning table mark of outer hd top face.
10. earth magnetism wagon detector according to claim 1 and 2, it is characterized in that, described PCBA mono-jiao is provided with the first positioning port/the first positioning table, one jiao, described support is provided with the first positioning table/the first positioning port, this first positioning table embeds the first positioning port, and PCBA is fixed on support by the flexible clamp piece on support; Described support side is provided with the second positioning table one, opposite side second positioning table two, inner housing side wall inner surfaces is provided with the second positioning port one and the second positioning port two, this second positioning table one embeds the second positioning port one, and this second positioning table two embeds the second positioning port two; Accordingly,
Described shell body sidewall top is provided with the 3rd positioning port/the 3rd positioning table, the y-axis positive dirction of geomagnetic sensor on the PCBA that the 3rd positioning port/the 3rd positioning table mark is fixed on described interior annular seal space; Cover in described and be provided with the 3rd positioning table/the 3rd positioning port, when inner cap is fixed on inner housing, the 3rd positioning table embeds the 3rd positioning port; Accordingly,
When described enclosing cover is fixed on shell body, the direction of arrow points the 3rd positioning port/the 3rd positioning table mark of outer hd top face.
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