CN201955192U - Air pressure change sensing device and motor vehicle driver field test system device thereof - Google Patents
Air pressure change sensing device and motor vehicle driver field test system device thereof Download PDFInfo
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- CN201955192U CN201955192U CN2011200362521U CN201120036252U CN201955192U CN 201955192 U CN201955192 U CN 201955192U CN 2011200362521 U CN2011200362521 U CN 2011200362521U CN 201120036252 U CN201120036252 U CN 201120036252U CN 201955192 U CN201955192 U CN 201955192U
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Abstract
The utility model relates to an air pressure change sensing device and a motor vehicle driver field test system device using the same. The air pressure change sensing device (1) comprises an elastic thin-wall hose (2) and an air pressure sensor (3), wherein the elastic thin-wall hose (2) has specified length, and a first cavity (4) and a second cavity (5) which are adjacent are formed in the elastic thin-wall hose (2) respectively; the first cavity (4) and the second cavity (5) are through cavities which have equal sections and are extended long the axis of the elastic thin-wall hose (2) respectively; and the air pressure sensor (3) is at least arranged at one end of the first cavity (4) formed in the elastic thin-wall hose (2), and meanwhile, the other end of the first cavity (4) is closed to sense change output electrical signals of air pressure in the first cavity (4).
Description
Technical field
The utility model relates to a kind of air transformation induction installation and utilizes its vehicle driver field test system device.
Background technology
At present, make subject two test items and the operation requirement of No. 111 regulation according to the Chinese Ministry of Public Security, (being driving efficiency examination place, vehicle driver place) goes up the different test item of design arrangement polytype in subject two examination places, and in accordance with regulations whether route running and the situation of finishing test item in the regulation place are examined the motor vehicle driving technical ability of automobile driver to drive motor vehicle by automobile driver.When automobile driver is being driven motor vehicle and is being taken an exam in the route running and in the place of each test item in accordance with regulations, if wheel touches the situation of place (perhaps road) edge line of mill train Road Edge line (perhaps center, track solid line) and each test item, then press the defective or deduction of points of the subject corresponding judgement examination of two examination judgment criteria relevant provisions.
China has made since No. 71 from the issue Ministry of Public Security in 2004, examine project at subject two examination place king-piles and begin to enable the computing machine automatic monitored control system, the Ministry of Public Security of issue in 2006 make the Ministry of Public Security of No. 91 and 2009 issue make No. 111 clearly the regulation stake examine the automatic monitored control system that should use a computer, further promoted the application in the road test place in the automobile driver field of computing machine automatic monitored control system, not only examine project, in other each test item automatic monitored control system that also makes up in succession and use a computer in stake.
The known computing machine automatic monitored control system of road test is that the inboard 20cm of place (perhaps road) edge line place at each test item buries magnet underground in the automobile driver field, gather induced signal and be input to on-vehicle control apparatus by vehicle-mounted Magnetic Sensor, on-vehicle control apparatus then judges according to this signal, just gives the driver with its results suggest when being judged to be the defective or deduction of points of examination.But this magnetic force signal of gathering buried magnet by Magnetic Sensor is differentiated wheel and whether is touched the mode of place (perhaps road) edge line that rolls each test item in ubiquity problem aspect the reliability.Whether whether trace it to its cause is to differentiate wheel by the magnetic force whether Magnetic Sensor senses magnet to touch to roll edge line rather than really touch by wheel and roll edge line and differentiate, so the variation of magnetic force of magnet just directly influence differentiate wheel and whether touch the accuracy of rolling edge line.If magnetic force is very weak, though wheel touch roll edge line also may respond to less than and cause misjudgment; If instead magnetic force is very strong, even wheel does not touch and rolls edge line and may respond to yet and obtain and cause misjudgment.In addition, the magnetic force of magnet is along with the time weakens gradually, and its serviceable life is shorter, needs often to change, and not only maintenance management bothers, and cost is also high.
The utility model content
Examine the computing machine automatic monitored control system and can not accurately differentiate the deficiency whether wheel touches place (perhaps road) edge line that rolls each test item in order to overcome existing vehicle driver field, the utility model provides a kind of air transformation induction installation and utilizes its vehicle driver field test system device, this test system device can not only be accurately, stable, judge whether wheel touches place (perhaps road) edge line that rolls examination place road edge line and center, track solid line and each test item reliably, and can carry out maintenance management easily.
The technical solution of the utility model is:
A kind of air transformation induction installation is characterized in that, described air transformation induction installation comprises:
Elasticity heavy wall flexible pipe, length and the inner first adjacent cavity and second cavity of being formed with respectively with regulation,
Described first cavity and second cavity, the perforation cavity that the uniform cross section of respectively doing for oneself prolongs along the axis of elasticity heavy wall flexible pipe,
Air pressure probe is installed on described first cavity, one end that forms in the described elasticity heavy wall flexible pipe at least, seals the other end of described first cavity simultaneously, in order to experience the variation output electric signal of air pressure in described first cavity.
According to air transformation induction installation of the present utility model, preferably: described first, second cavity sectional area separately varies in size.
According to air transformation induction installation of the present utility model, preferably: described air pressure probe is installed in described first cavity that forms in the described elasticity heavy wall flexible pipe.
The 4th optimal technical scheme is that the air transformation induction installation 1 with first optimal technical scheme is an object, it is characterized in that:
According to air transformation induction installation of the present utility model, preferably: described air transformation induction installation is a kind of air transformation induction installation that places ground to use,
The cross section of described elasticity heavy wall flexible pipe is placing under the state on ground, is nearly trapezoid cross section,
Described first cavity and second cavity be arranged to first cavity on subaerial second cavity and ground far away, and the sectional area of described second cavity are greater than the sectional areas of described first cavity.
Another optimal technical scheme of the present utility model is a kind of vehicle driver field test system device, it is characterized in that, described vehicle driver field test system device comprises:
The described air transformation of above-mentioned first to fourth arbitrary technical scheme induction installation, described air transformation induction installation are arranged on the regulation highway section on the ground, examination hall, field of vehicle driver,
The place signal cabin collection of letters control device that is connected with above-mentioned air pressure probe telecommunications receives the electric signal that described air pressure probe is exported,
The place signal cabin signal identification device that is connected with above-mentioned place signal cabin collection of letters control device telecommunications receives from the electric signal of place signal cabin collection of letters control device and differentiates validity,
The place signal cabin that is connected with the above-mentioned place signal cabin signal identification device telecommunications control device of posting a letter,
With the above-mentioned place signal cabin cab signal control device that control device telecommunications is connected of posting a letter, receive with wireless mode and to post a letter by described place signal cabin that control device sends, and effective electric signal of differentiating through described place signal cabin signal identification device,
The vehicle-mounted discriminating gear that is connected with above-mentioned cab signal control device telecommunications receives from the electric signal of cab signal control device and the judge that takes an exam,
The Control Room searching and managing device that is connected with above-mentioned vehicle-mounted discriminating gear telecommunications receives and stores described exam information so that inquiry and transmission or copy with wireless mode.
As the described air transformation of the utility model first to the 3rd optimal technical scheme induction installation 1, because this air transformation induction installation 1 comprises: length and the inner first adjacent cavity 4 and the elasticity heavy wall flexible pipe 2 of second cavity 5 of being formed with respectively with regulation, described first cavity 4 and the second cavity 5 perforation cavity that uniform cross section prolongs along the axis of elasticity heavy wall flexible pipe 2 of respectively doing for oneself, at least be installed on an end of first cavity that forms in the described elasticity heavy wall flexible pipe 2, the other end that seals described first cavity 4 is simultaneously exported the air pressure probe 3 of electric signal in order to the variation of experiencing air pressure in described first cavity 4; Also have, described cavity 4,5 sectional area separately varies in size; Have, described air pressure probe 3 also is installed in each end of described first cavity 4 that forms in the described elasticity heavy wall flexible pipe 2, so air transformation induction installation 1 of the present utility model goes for various needed occasions again.
The air transformation induction installation 1 of the 4th optimal technical scheme and for example of the present utility model, because described air transformation induction installation 1 is a kind of air transformation induction installation 1 that places ground to use, the cross section of described elasticity heavy wall flexible pipe 2 is nearly trapezoid cross section placing under the state on ground, described first cavity 4 and second cavity 5 are arranged to the sectional area of the sectional area of second cavity 5 near the ground and ground first cavity 4 far away and described second cavity 5 greater than described first cavity 4, so air transformation induction installation 1 of the present utility model goes for the occasion as vehicle driver field test system device etc.
The vehicle driver field test system device of another optimal technical scheme and for example of the present utility model, because comprise: be arranged on the air transformation induction installation 1 that arbitrary technical scheme of first to fourth in the regulation highway section on examination hall, vehicle driver field ground is stated, the place signal cabin collection of letters control device 6 that is connected with air pressure probe 3 telecommunications receives the electric signal of described air pressure probe 3 outputs, the place signal cabin signal identification device 7 that is connected with place signal cabin collection of letters control device 6 telecommunications receives from the electric signal of place signal cabin collection of letters control device 6 and differentiates validity, the place signal cabin that is connected with the place signal cabin signal identification device 7 telecommunications control device 8 of posting a letter, receive by the described place signal cabin effective electric signal that the described place of process signal cabin signal identification device 7 that control device 8 sends differentiated of posting a letter with wireless mode with post a letter cab signal control device 9 that control device 8 telecommunications are connected of place signal cabin, the vehicle-mounted discriminating gear that is connected with cab signal control device 9 telecommunications 10 receives the judge that takes an exam of electric signal from cab signal control device 9, the Control Room searching and managing device 11 that is connected with vehicle-mounted discriminating gear 10 telecommunications receives with wireless mode and stores described exam information so that inquiry and transmission or copy, so air transformation induction installation 1 of the present utility model is applicable to vehicle driver field test system device.
Specifically, in the technical solution of the utility model, because elasticity heavy wall flexible pipe 2 constitutes air transformation induction installations 1 with the air pressure probe 3 that is arranged on elasticity heavy wall flexible pipe 2 one ends, the material of elasticity heavy wall flexible pipe 2 has the elastic deformation characteristic, add that elasticity heavy wall flexible pipe 2 shape of cross sections are made for closely trapezoidal (or nearly triangle), be formed with two cavitys 4 in elasticity heavy wall flexible pipe 2 inside along its length, 5, first cavity 4 is formed on close top and its diameter equalization of elasticity heavy wall flexible pipe 2 xsects, second cavity 5 is formed on the below of first cavity 4 and relative first cavity 4 of its diameter bigger, so first cavity 4 is shunk and when causing the variation of its internal air pressure when external force acts on described first cavity 4, described air pressure probe 3 measures the variation of first cavity, 4 internal air pressures, and converts pressure change signal to electric signal and output to place signal cabin collection of letters control device 6.Simultaneously, the effect of second cavity 5 is: improve its elasticity and make first cavity 4 more easily deformable when the outer wall of first cavity 4 is subjected to external force, realize that the contraction of first cavity 4 is smooth and easy with expansion.Also have, owing to be that air transformation induction installation 1 of the present utility model is used in vehicle driver field test system device, being about to the bottom surface of elasticity heavy wall flexible pipe 2 that shape of cross section is closely trapezoidal (or triangle) place (perhaps road) edge line of road test place road edge line and center, track solid line and each test item in the automobile driver field is attached on the ground, air pressure probe 3 is connected an end of first cavity 4 that is formed at elasticity heavy wall flexible pipe 2, and seals the other end of first cavity 4.Elasticity heavy wall flexible pipe 2 outside pressurizeds when tire in the vehicle ' touches place (perhaps road) edge line of mill train Road Edge line and center, track solid line and each test item, first cavity 4 is shunk, and cause the variation of its internal air pressure because of the contraction of first cavity 4, this moment, air pressure probe 3 measured the variation of first cavity, 4 internal air pressures, and converted pressure change signal to electric signal and output to place signal cabin collection of letters control device 6.In utilizing the vehicle driver field test system device of air transformation induction installation 1, when earth signal chamber collection of letters control device 6 receives the electric signal of being exported by air pressure probe 3 then and there, electric signal is input to place signal cabin signal identification device 7 to carry out the distinguishing validity of electric signal and sends to cab signal control device 9 by the place signal cabin control device 8 of posting a letter with wireless mode, cab signal control device 9 is input to electric signal the judge that takes an exam of vehicle-mounted discriminating gear 10 again, after in the standard of passing the examination (full marks 100 minutes), deducting corresponding deduction of points and being worth the actual examination score of calculating the driver, whether pass the examination through making the passing score of No. 111 regulation compare to determine with the Ministry of Public Security, and exam information sent to Control Room searching and managing device 11 with wireless mode, so that inquiry and transmission or copy are given related management department.
The beneficial effects of the utility model are: place (perhaps road) edge line that whether really touches mill train Road Edge line and center, track solid line and each test item by wheel is differentiated, accuracy of judgement, stable, reliable; Air transformation induction installation 1 and what utilize that its vehicle driver field test system device responded to is that elasticity heavy wall flexible pipe 2 internal air pressures change, thereby be not subjected to extraneous climate effect; Air transformation induction installation 1 and utilize its vehicle driver field test system device can realize the robotization that examine the vehicle driver field; The main elasticity heavy wall flexible pipe 2 that adopts in the air transformation induction installation 1, maintenance management is simple, and cost is low.
Description of drawings
Fig. 1 is an air transformation induction installation pie graph among the utility model embodiment.
Fig. 2 is the cross-sectional view of elasticity heavy wall flexible pipe shown in Figure 1.
To be elasticity heavy wall flexible pipe shown in Figure 2 touched the sectional view that first and second cavitys in the elasticity heavy wall flexible pipe deform when rolling by wheel to Fig. 3.
Fig. 4 is that vehicle driver field test system device constitutes synoptic diagram among the utility model embodiment.
Among the figure: 1. air transformation induction installation, 2. elasticity heavy wall flexible pipe, 3. air pressure probe, 4. first cavity, 5. second cavity, 6. collection of letters control device, 7. signal identification device, the control device of 8. posting a letter, 9. cab signal control device, 10. vehicle-mounted discriminating gear, 11. searching and managing devices, 12. output instruments.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is further described.
In Fig. 1, air transformation induction installation 1 is made of elasticity heavy wall flexible pipe 2 and the air pressure probe 3 that is arranged on elasticity heavy wall flexible pipe 2 one ends, and elasticity heavy wall flexible pipe 2 place (perhaps road) edge line of road test place road edge line and center, track solid line and each test item in the automobile driver field is attached on the ground.
In Fig. 2, the synthetic resin (as: rubber) of the flexible deformation characteristic of described elasticity heavy wall flexible pipe 2 apparatus is made, xsect is closely trapezoidal (or triangle) shape, length in closely trapezoidal (or triangle) xsect inside along its elasticity heavy wall flexible pipe 2 is formed with two cavitys 4,5, the equal diameter cavity that wherein is formed on top is first cavity 4, and another the bigger cavity of relative first cavity, 4 diameters that is formed on first cavity, 4 bottoms is second cavity 5.
As shown in Figure 1 in the air transformation induction installation 1, the bottom surface that xsect is closely trapezoidal (or triangle) elasticity heavy wall flexible pipe 2 is attached on the ground along place (perhaps road) edge line of examination hall, vehicle driver field ground road edge line and center, track solid line and each test item; Air pressure probe 3 is connected in first cavity, 4 one ends that are formed on elasticity heavy wall flexible pipe 2, meanwhile seals the other end of first cavity 4.It is in order to measure the variation of its internal air pressure that the utility model makes elasticity heavy wall flexible pipe 2 form first cavity 4; Form 5 of second cavitys and be in order to improve its elasticity when elasticity heavy wall flexible pipe 2 outside pressurizeds and make first cavity 4 easily deformable, the contraction that realizes first cavity 4 with expand smooth and easy so that air pressure probe 3 is measured the variation of first cavity, 4 internal air pressures.The air pressure probe 3 that is arranged at first cavity, 4 one ends is to be used for responding to first cavity 4 to change because of its internal air pressure that contraction produces, change in order to make air pressure probe 3 accurately measure first cavity, 4 internal air pressures, must seal the other end of first cavity 4.
In Fig. 3, when elasticity heavy wall flexible pipe 2 outside pressurizeds, first cavity 4 will shrink, and causes the variation of its internal pressure because of the contraction of first cavity 4.As shown in Figure 4, air pressure probe 3 measured first cavity, 4 internal pressures and changed this moment, and converted this pressure change signal to electric signal and output to place signal cabin collection of letters control device 6.
In the embodiment shown in fig. 4, utilize the vehicle driver field test system device of air transformation induction installation 1, constitute by four macroplates such as the site facility that comprises air transformation induction installation 1, place signal cabin, mobile unit, Control Rooms, be wired linking to each other between air transformation induction installation 1 and the place signal cabin.Then being wireless linking to each other between place signal cabin and mobile unit and mobile unit and the Control Room, is wired continuous between the various devices in each plate.When earth signal chamber collection of letters control device 6 receives the electric signal of being exported by air pressure probe 3 then and there, this electric signal is input to the distinguishing validity that place signal cabin signal identification device 7 carries out electric signal, and send to cab signal control device 9 with wireless mode by the place signal cabin control device 8 of posting a letter, cab signal control device 9 is input to electric signal the judge that takes an exam of vehicle-mounted discriminating gear 10 again, place (perhaps road) edge line of road test place road edge line or center, track solid line or each test item in prompting driver wheel touches and rolled, and in the standard of passing the examination (full marks 100 minutes), deduct corresponding deduction of points and be worth the actual examination score of calculating the driver.Simultaneously at driver's driving condition or finish under the state of driving, through making the passing score of No. 111 regulation compare with the Ministry of Public Security, driver's actual examination score be equal to or be judged as when exceeding the mark of regulation qualified, when if driver's actual examination score does not reach the mark of regulation then be judged as defective, by vehicle-mounted discriminating gear 10 exam information is sent to Control Room searching and managing device 11 with wireless mode then, and show and print that with Control Room output instrument 12 transmission simultaneously or copy are given related management department.
In specific embodiment, in ground, examination hall, vehicle driver field, stop in the side, by monolateral bridge, curve driving, right-angled bend, travel by continuous obstacle, continuous curve, air transformation induction installation all be set on place (perhaps road) edge line of examination such as right-angled bend continuously, 8 word roads and training program.
As present embodiment, whether really to touch place (perhaps road) edge line of mill train Road Edge line and center, track solid line and each test item by wheel and differentiate, the judgement that obtains is accurate, stable, reliable; Air transformation induction installation 1 and what utilize that its vehicle driver field test system device responded to is that elasticity heavy wall flexible pipe 2 internal air pressures change, thereby be not subjected to extraneous climate effect; Air transformation induction installation 1 and utilize its vehicle driver field test system device can realize the robotization that examine the vehicle driver field; The main elasticity heavy wall flexible pipe 2 that adopts in the air transformation induction installation 1 is so maintenance management is simply with low cost.
-other embodiment-
Among the described embodiment be air transformation induction installation 1 with one be object and be arranged at the field and examine ground.But be not limited to this, can make sectional type air transformation induction installation as required, be used in combination, or described air transformation induction installation partly is embedded in the field examines ground and use.
Also have, be to be applicable to the air transformation induction installation of vehicle driver field test system device among the described embodiment, but the utility model is not limited to this, adopts the elasticity heavy wall flexible pipe corresponding to the big low-force of difference can be applicable to various occasions, for example the security protection of machining etc.
In addition, above embodiment is preferred example in essence, has no intention to limit the utility model and suitable thing thereof and purposes scope.
As embodiment of the present utility model, use air transformation induction installation 1 of the present utility model and utilize its vehicle driver field test system device, having solved the Magnetic Sensor that is adopted up to now gathers in the mode that the magnetic force signal of buried magnet differentiates, because directly influencing the differentiation wheel, the variation of magnetic force of magnet whether touches the accuracy of rolling edge line, touch when promptly causing magnetic force very weak and do not feel, magnetic force does not touch the also false judgment of sense when very strong, and the magnetic force of magnet is along with the time weakens gradually, its serviceable life is shorter, need often to change, not only maintenance management bothers, and the also high problem of cost, whether really touch the air transformation induction installation 1 of the present utility model of place (perhaps road) edge line that rolls road edge line and center, track solid line and each test item and utilize its vehicle driver field test system device to differentiate by wheel, obtained accurately, stable, judge reliably; Also have, be the air pressure variations of elasticity heavy wall flexible pipe 2 inside owing to what respond to, thereby also be not subjected to extraneous climate effect; Can realize the robotization that examine the vehicle driver field according to the utility model; Have again, because the main elasticity heavy wall flexible pipe 2 that adopts in the utility model, so maintenance management is simple and with low cost.
Claims (5)
1. air transformation induction installation is characterized in that comprising:
Elasticity heavy wall flexible pipe (2), length and inner adjacent first cavity (4) and second cavity (5) of being formed with respectively with regulation,
Described first cavity (4) and second cavity (5), the perforation cavity that the uniform cross section of respectively doing for oneself prolongs along the axis of elasticity heavy wall flexible pipe (2),
Air pressure probe (3), at least be installed on an end of described first cavity (4) that forms in the described elasticity heavy wall flexible pipe (2), seal the other end of described first cavity (4) simultaneously, in order to experience the variation output electric signal of air pressure in described first cavity (4).
2. air transformation induction installation as claimed in claim 1 is characterized in that, described cavity (4,5) sectional area separately varies in size.
3. air transformation induction installation as claimed in claim 1 is characterized in that, described air pressure probe (3) is installed in described first cavity (4) that forms in the described elasticity heavy wall flexible pipe (2).
4. air transformation induction installation as claimed in claim 1 is characterized in that:
Described air transformation induction installation (1) is a kind of air transformation induction installation (1) that places ground to use,
The cross section of described elasticity heavy wall flexible pipe (2) is placing under the state on ground, is nearly trapezoid cross section,
Described first cavity (4) and second cavity (5) be arranged to second cavity near the ground (5) and ground first cavity (4) far away, and the sectional area of described second cavity (5) are greater than the sectional areas of described first cavity (4).
5. a vehicle driver field test system device is characterized in that, comprising:
Each described air transformation induction installation (1) of claim 1 to 4, described air transformation induction installation (1) are arranged on the regulation highway section on ground, examination hall, vehicle driver field,
With the place signal cabin collection of letters control device (6) that air pressure probe (3) telecommunications is connected, receive the electric signal of described air pressure probe (3) output,
The place signal cabin signal identification device (7) that is connected with place signal cabin collection of letters control device (6) telecommunications receives from the electric signal of place signal cabin collection of letters control device (6) and differentiates validity,
The place signal cabin that is connected with place signal cabin signal identification device (7) the telecommunications control device (8) of posting a letter,
With the place signal cabin cab signal control device (9) that control device (8) telecommunications is connected of posting a letter, receive by the described place signal cabin effective electric signal that control device (8) sends, differentiated through described place signal cabin signal identification device (7) of posting a letter with wireless mode
The vehicle-mounted discriminating gear (10) that is connected with cab signal control device (9) telecommunications receives the judge that takes an exam of electric signal from cab signal control device (9),
The Control Room searching and managing device (11) that is connected with vehicle-mounted discriminating gear (10) telecommunications receives and stores described exam information so that inquiry and transmission or copy with wireless mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200362521U CN201955192U (en) | 2011-02-11 | 2011-02-11 | Air pressure change sensing device and motor vehicle driver field test system device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200362521U CN201955192U (en) | 2011-02-11 | 2011-02-11 | Air pressure change sensing device and motor vehicle driver field test system device thereof |
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| CN201955192U true CN201955192U (en) | 2011-08-31 |
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| CN2011200362521U Expired - Fee Related CN201955192U (en) | 2011-02-11 | 2011-02-11 | Air pressure change sensing device and motor vehicle driver field test system device thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509492A (en) * | 2011-10-18 | 2012-06-20 | 荣莘电子科技（上海）有限公司 | Detection system for circular cake in training examination field by using built-in elastic thick-wall hose |
| CN102629426A (en) * | 2012-04-20 | 2012-08-08 | 北京精英智通交通系统科技有限公司 | Self-checking method and self-checking system of side line crossing signal |
| CN107103814A (en) * | 2017-02-28 | 2017-08-29 | 广州地理研究所 | A kind of reversing storage checking system and its application process based on vehicle electron identifying |
-
2011
- 2011-02-11 CN CN2011200362521U patent/CN201955192U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509492A (en) * | 2011-10-18 | 2012-06-20 | 荣莘电子科技（上海）有限公司 | Detection system for circular cake in training examination field by using built-in elastic thick-wall hose |
| CN102629426A (en) * | 2012-04-20 | 2012-08-08 | 北京精英智通交通系统科技有限公司 | Self-checking method and self-checking system of side line crossing signal |
| CN107103814A (en) * | 2017-02-28 | 2017-08-29 | 广州地理研究所 | A kind of reversing storage checking system and its application process based on vehicle electron identifying |
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