CN201435153Y - Vehicle-speed analog device - Google Patents
Vehicle-speed analog device Download PDFInfo
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- CN201435153Y CN201435153Y CN2009200735125U CN200920073512U CN201435153Y CN 201435153 Y CN201435153 Y CN 201435153Y CN 2009200735125 U CN2009200735125 U CN 2009200735125U CN 200920073512 U CN200920073512 U CN 200920073512U CN 201435153 Y CN201435153 Y CN 201435153Y
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Abstract
A vehicle-speed analog device comprises a magnetic field generation unit, a switch element, and a control unit, wherein the magnetic field generation unit comprises at least two coils; the switch element comprises at least two switch elements corresponding to the coils respectively; and the control unit turns on the two switch elements with predetermined time interval respectively, so that currents are generated in the coils connected with the switch elements, and the predetermined time interval is equal to the value of the distance between the two coils divided by predetermined speed. The vehicle-speed analog device can analog practical vehicles running with predetermined speed, can be used for check vehicle detectors, and has the advantages of high check accuracy and large check range.
Description
Technical field
The utility model relates to the traffic control system field, particularly relates to a kind of speed of a motor vehicle analogue means.
Background technology
Along with the development of intelligent transportation, various wagon detectors are used in engineering in a large number.Wagon detector is to detect target with motor vehicles, and passing through or having situation, its effect of detection vehicle is to provide enough information so that carry out optimum control for intelligent traffic control system.Wagon detector commonly used mainly contains induction type Loop Vehicle Detector, radar detector and based on the video detector of computer vision technique etc.Wherein, advantage such as the induction type Loop Vehicle Detector has stable performance, circuit is simple, cost is low, easy to use, non-maintaining, thereby in engineering, used widely.
Loop Vehicle Detector is a kind of wagon detector based on electromagnetic induction principle, imbeds a toroid winding on the vehicle process Road Detection point face of land, and it is as the sensor of wagon detector, and logical in coil certain oscillatory work electric current.When vehicle passed through on the annular ground induction coil, vehicle self irony cutting magnetic line caused the variation of wire loop inductance value, and detecting device is by detecting the existence that this inductance value just can detect vehicle.If use two (or a plurality of) ground induction coils, by the mistiming of front and back coil and the distance of front and back coil, just the speed of vehicle can have been calculated with vehicle.
Wagon detector is an important step in the intelligent traffic control system, therefore, and to the Loop Vehicle Detector accuracy checking with used the inspection of engineering quality of Loop Vehicle Detector also extremely important.At present, actual vehicle commonly used is travelled and is carried out accuracy checking and inspection of engineering quality, and still such method of inspection is inconvenient operation not only, and cost is also higher.
The utility model content
The problem that the utility model solves is to provide a kind of speed of a motor vehicle analogue means, the actual vehicle that simulation is travelled at a predetermined velocity.
For addressing the above problem, the utility model provides a kind of speed of a motor vehicle analogue means, comprising:
The magnetic field generation unit comprises at least two coils;
Switch element comprises at least two on-off elements, the described coil of corresponding respectively connection;
Control module is opened two on-off elements respectively with predetermined time interval, makes in the coil that is connected with described on-off element and produces electric current, and described predetermined time interval equals two distances between the coil divided by preset vehicle speed.
Optionally, described control module comprises: record cell, the distance between the recording scheduled speed of a motor vehicle and two coils; Computing unit calculates predetermined time interval, and described predetermined time interval equals two distances between the coil divided by preset vehicle speed; Transmitting element, send first control signal and second control signal respectively in first schedule time and second schedule time, described first control signal and second control signal are controlled respectively and are opened two on-off elements, and the difference of described second schedule time and first schedule time is the described predetermined time interval that calculates.
Optionally, described coil is layed on the ground induction coil of wagon detector.
Optionally, described speed of a motor vehicle analogue means also comprises: comparing unit, calculate the speed of a motor vehicle, and the more described preset vehicle speed and the speed of a motor vehicle that calculates, the described speed of a motor vehicle equals the time interval that two distances between the ground induction coil change divided by two ground induction coil inductance values.
Optionally, described coil is slightly less than ground induction coil.
Optionally, the number of turn of described coil is more than or equal to 10.
Optionally, described on-off element is switch triode or metal oxide semiconductor transistor.
Optionally, described speed of a motor vehicle analogue means also comprises: buffer cell is connected between described control module and the switch element control signal of the described on-off element of output control.
Optionally, described control module is by computing machine or chip microcontroller.
Optionally, described speed of a motor vehicle analogue means also comprises: power supply, and when described on-off element is opened, to the described coil power supply that is connected with on-off element.
Optionally, described power supply is rechargeable battery or dry cell.
Above-mentioned speed of a motor vehicle analogue means can be simulated the actual vehicle of travelling with preset vehicle speed, and it is simple in structure, easy to operate, cost is lower, and can reach the actual vehicle inaccessible high speed of travelling easily.Use actual vehicle to travel to check wagon detector, use above-mentioned speed of a motor vehicle analogue means can make check more accurate compared to existing, and because speed of a motor vehicle analogue means can be simulated the actual vehicle of running at high speed, thereby make that the scope of check is bigger.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the utility model speed of a motor vehicle analogue means;
Fig. 2 is the structural representation of the another kind of embodiment of the utility model speed of a motor vehicle analogue means;
Fig. 3 is an embodiment circuit diagram of the utility model speed of a motor vehicle analogue means;
Fig. 4 and Fig. 5 are that the size and the position of the ground induction coil of the coil of the utility model speed of a motor vehicle analogue means and wagon detector concerns synoptic diagram;
Fig. 6 is the process flow diagram that the control module of speed of a motor vehicle analogue means shown in Figure 3 transmits control signal;
Fig. 7 is another embodiment circuit diagram of the utility model speed of a motor vehicle analogue means;
Fig. 8 is the process flow diagram that the control module of speed of a motor vehicle analogue means shown in Figure 7 transmits control signal.
Embodiment
The speed of a motor vehicle analogue means of the utility model embodiment is to pass to electric current at a certain time interval in former and later two coils separated by a distance, thus the speed that simulating vehicle travels.
The coil of speed of a motor vehicle analogue means is covered the annular ground induction coil top of wagon detector, in coil, pass to electric current, because electric current produces magnetic field, this magnetic field energy changes the magnetic line of force of the ground induction coil of wagon detector, thereby cause the variation of the inductance value in ground induction coil loop, promptly can simulating vehicle through the situation of ground induction coil top.Therefore, in former and later two coils, pass to electric current at a certain time interval, just can simulating vehicle with the situation of certain speed by the ground induction coil top.
Below in conjunction with drawings and Examples the utility model embodiment is described in detail.
Fig. 1 is the structural representation of a kind of embodiment of the utility model speed of a motor vehicle analogue means, shown in speed of a motor vehicle analogue means comprise: magnetic field generation unit 11, switch element 12 and control module 13.
Magnetic field generation unit 11 comprises at least two coils, behind coil electricity, produces electric current in coil, and electric current produces magnetic field.Described coil is made up of the multiturn lead, and the number of coil can be selected according to actual requirement of engineering, can have two, three or a plurality of.
Record cell 130, the distance between the recording scheduled speed of a motor vehicle and two coils.
Transmitting element 132, send first control signal and second control signal respectively in first schedule time and second schedule time, described first control signal and second control signal are controlled respectively and are opened two on-off elements, and the difference of described second schedule time and first schedule time is the described predetermined time interval that calculates.
The coil of magnetic field generation unit is layed in respectively on the annular ground induction coil of wagon detector, just can simulating vehicle with the situation of certain speed by annular ground induction coil top, Fig. 2 is the structural representation of the another kind of embodiment of the utility model speed of a motor vehicle analogue means, compared to Figure 1, speed of a motor vehicle analogue means shown in Figure 2 can also comprise: comparing unit 23, calculate the speed of a motor vehicle, and the preset vehicle speed of the speed of a motor vehicle that relatively calculates and described control module 13 records, the described speed of a motor vehicle equals the time interval that two distances between the ground induction coil change divided by two toroid winding inductance values.
In the coil of speed of a motor vehicle analogue means, pass to electric current, because electric current produces magnetic field, this magnetic field energy changes the magnetic line of force of following annular ground induction coil, thereby cause the variation of the inductance value in toroid winding loop, write down the time that two toroid winding inductance values change respectively, then computing time poor, i.e. two time intervals that the toroid winding inductance value changes.
According to the distance calculation speed of a motor vehicle between the described time interval and two toroid windings.Distance between two toroid windings divided by the time interval that calculates, can be obtained the speed of vehicle ', and this speed is exactly the detected speed of a motor vehicle of wagon detector.The preset vehicle speed of the speed of a motor vehicle that calculates and control module 13 records is compared, just can obtain the precision of wagon detector detection Vehicle Speed, thereby realized accuracy test wagon detector.
Comparing unit 23 also can be realized by other device, and for example, the time that can change by the inductance value of computer recording annular ground induction coil, computing time at interval and the speed of a motor vehicle then.
Fig. 3 is an embodiment circuit diagram of the utility model speed of a motor vehicle analogue means, and in the present embodiment, the on-off element of the coil of magnetic field generation unit 11 and switch element 12 is that example describes with two.
As shown in Figure 3, the magnetic field generation unit comprises two coil 11a, 11b.Consider magnetic field intensity formula: H=nI (wherein, I flows through solenoidal electric current, n is the solenoid number of turns in the unit length) and the influence size that ground induction coil produces wanted constant requirement, the number of turn of coil will have some, more than best 10 circles, and the size requirements of coil can be placed in the ground induction coil and the interior week of as far as possible pasting ground induction coil, that is to say that coil should be slightly less than annular ground induction coil.
Fig. 4 and Fig. 5 are that the size and the position of the ground induction coil of the coil of the utility model speed of a motor vehicle analogue means and wagon detector concerns synoptic diagram.Wherein, Fig. 4 is the road surface vertical view, and Fig. 5 is the cut-open view along the A-A line of Fig. 4.Among Fig. 4, periphery is ground induction coil cutting groove 41 cut channel on the road surface of wagon detector, and interior week is the coil 42 of the magnetic field generation unit of speed of a motor vehicle analogue means.Among Fig. 5, the coil 42 of speed of a motor vehicle analogue means is layed on the road surface 44 of ground induction coil 43 tops of wagon detector, and coil 42 is pressed close to the interior week of ground induction coil cutting groove 41.
The on-off element of switch element 12 comprises two switch triode 12a, 12b, TIP41C for example, and switch triode has the very little characteristic of delay time.The emitter connecting coil 11a of switch triode 12a, collector connects power supply 15, base stage input control signal C11; The emitter connecting coil 12a of switch triode 12b, collector connects power supply 15, base stage input control signal C21.Unlatching and the shutoff of control signal C11 gauge tap triode 12a, after switch triode 12a opened, power supply 15 made coil 11a energising by switch triode 12a, produces electric current in coil 11a.Unlatching and the shutoff of control signal C21 gauge tap triode 12b, after switch triode 12b opened, power supply 15 made coil 11b energising by switch triode 12b, produces electric current in coil 11b.In other embodiments, on-off element also can be metal-oxide semiconductor (MOS) (MOS) transistor etc. other have the element of switching characteristic.
Control module comprises the computing machine (not shown), and computing machine sends control signal C10, C20 by parallel port 13a, to open switch triode 12a, 12b at the fixed time at interval respectively.The flow process that computing machine transmits control signal to parallel port 13a is as shown in Figure 6: step S61, obtain distance and preset vehicle speed between coil 11a, the 11b; Step S62 calculates predetermined time interval t; Step S63 is to parallel port 13a output control signal C10; Step S64, delay time t; Step S65 is to parallel port 13a output control signal C20.This flow process can realize by computer program.In other embodiments, control module also can be realized by single-chip microcomputer (MCU).Can make the application of speed of a motor vehicle analogue means more flexible by the computer operated switch unit.
For the control signal that makes gauge tap triode 12a, 12b is more stable, speed of a motor vehicle analogue means shown in Figure 3 also comprises buffer cell 14, is connected between control module 13 and the switch element 12.Control signal C10, C20 that buffer cell 14 receiving computers send to parallel port 13a, output is used for control signal C11, the C21 of gauge tap triode 12a, 12b.Buffer cell 14, for example electrical equipment HC244 plays buffer action to control signal C10, C20, can obtain more stable control signal C11, C12.
COMPUTER CALCULATION predetermined time interval t, t=D/v;
Computing machine is to parallel port 13a write data 0x01, and the pin 2 of parallel port 13a has signal, and other pin no signal is promptly exported control signal C10;
The control signal C10 buffering controlled signal C11 in back, open switch triode 12a, make coil 11a energising, produce electric current among the coil 11a, because of electric current produces magnetic field, the first toroidal magnetic line of force that is covered by coil 11a is changed, thereby cause that the first toroidal inductance value changes, pass through the first toroidal situation with this simulating vehicle;
Delay time t;
Computing machine is to parallel port 13a write data 0x04, and the pin 4 of parallel port 13a has signal, and other pin no signal is promptly exported control signal C20;
The control signal C20 buffering controlled signal C21 in back, open switch triode 12b, make coil 11b energising, produce electric current among the coil 11b, because of electric current produces magnetic field, the second toroidal magnetic line of force that is covered by coil 11b is changed, thereby cause that the second toroidal inductance value changes, pass through the second toroidal situation with this simulating vehicle;
Computing machine is to parallel port 13a write data 0x00, stopcock triode 12a, 12b.
If the time that the first toroidal inductance value changes is t1, the time that the second toroidal inductance value changes is t2, the detected speed of a motor vehicle vt=D/ of wagon detector (t2-t1) so, relatively speed of a motor vehicle vt and preset vehicle speed v just can know whether wagon detector can accurately detect the speed of vehicle.
Fig. 7 is another embodiment circuit diagram of the utility model speed of a motor vehicle analogue means, and in the present embodiment, the coil of magnetic field generation unit and the on-off element of switch element are that example describes with three.
As shown in Figure 7, the magnetic field generation unit comprises three coil 11a, 11b, 11c.Corresponding, the on-off element of switch element comprises three switch triode 12a, 12b, 12c, for example TIP41C.The emitter connecting coil 11a of switch triode 12a, collector connects power supply 15, base stage input control signal C11; The emitter connecting coil 12a of switch triode 12b, collector connects power supply 15, base stage input control signal C21; The emitter connecting coil 11c of switch triode 12c, collector connects power supply 15, base stage input control signal C31.Unlatching and the shutoff of control signal C11 gauge tap triode 12a, after switch triode 12a opened, power supply 15 made coil 11a energising by switch triode 12a, produces electric current in coil 11a.Unlatching and the shutoff of control signal C21 gauge tap triode 12b, after switch triode 12b opened, power supply 15 made coil 11b energising by switch triode 12b, produces electric current in coil 11b.Unlatching and the shutoff of control signal C31 gauge tap triode 12c, after switch triode 12c opened, power supply 15 made coil 11c energising by switch triode 12c, produces electric current in coil 11c.Power supply 15 can use dry cell.
In the present embodiment, control module 13 is a chip microcontroller, and single-chip microcomputer sends control signal C11, C21, C31, to open switch triode 12a, 12b, 13c at the fixed time at interval respectively.The flow instance that single-chip microcomputer transmits control signal can be as shown in Figure 8: step S81, obtain distance and preset vehicle speed between coil 11a, the 11b, and distance between coil 11b, the 11c and preset vehicle speed; Step S82 calculates predetermined time interval t1 and t2; Step S83, output control signal C11; Step S84, delay time t1; Step S85, output control signal C21; Step S86, delay time t2; Step S87, output control signal C31.
Above-mentioned speed of a motor vehicle analogue means is simple in structure, easy to operate, cost is lower, and can reach the actual vehicle inaccessible high speed of travelling easily.Use actual vehicle to travel to check wagon detector, use above-mentioned speed of a motor vehicle analogue means can make check more accurate compared to existing, and because speed of a motor vehicle analogue means can be simulated the actual vehicle of running at high speed, thereby make that the scope of check is bigger.
Though the utility model with preferred embodiment openly as above; but it is not to be used for limiting the utility model; any those skilled in the art are not in breaking away from spirit and scope of the present utility model; can make possible change and modification, therefore protection domain of the present utility model should be as the criterion with the scope that the utility model claim is defined.
Claims (11)
1. a speed of a motor vehicle analogue means is characterized in that, comprising:
The magnetic field generation unit comprises at least two coils;
Switch element comprises at least two on-off elements, the described coil of corresponding respectively connection;
Control module is opened two on-off elements respectively with predetermined time interval, makes in the coil that is connected with described on-off element and produces electric current, and described predetermined time interval equals two distances between the coil divided by preset vehicle speed.
2. speed of a motor vehicle analogue means according to claim 1 is characterized in that, described control module comprises:
Record cell, the distance between the recording scheduled speed of a motor vehicle and two coils;
Computing unit calculates predetermined time interval, and described predetermined time interval equals two distances between the coil divided by preset vehicle speed;
Transmitting element, send first control signal and second control signal respectively in first schedule time and second schedule time, described first control signal and second control signal are controlled respectively and are opened two on-off elements, and the difference of described second schedule time and first schedule time is the described predetermined time interval that calculates.
3. speed of a motor vehicle analogue means according to claim 1 is characterized in that described coil is layed on the ground induction coil of wagon detector.
4. speed of a motor vehicle analogue means according to claim 3, it is characterized in that, also comprise: comparing unit, calculate the speed of a motor vehicle, and the more described preset vehicle speed and the speed of a motor vehicle that calculates, the described speed of a motor vehicle equals the time interval that two distances between the ground induction coil change divided by two ground induction coil inductance values.
5. speed of a motor vehicle analogue means according to claim 3 is characterized in that described coil is slightly less than ground induction coil.
6. speed of a motor vehicle analogue means according to claim 1 is characterized in that the number of turn of described coil is more than or equal to 10.
7. speed of a motor vehicle analogue means according to claim 1 is characterized in that, described on-off element is switch triode or metal oxide semiconductor transistor.
8. speed of a motor vehicle analogue means according to claim 1 is characterized in that, also comprises: buffer cell is connected between described control module and the switch element control signal of the described on-off element of output control.
9. speed of a motor vehicle analogue means according to claim 1 is characterized in that, described control module is by computing machine or chip microcontroller.
10. speed of a motor vehicle analogue means according to claim 1 is characterized in that, also comprises: power supply, and when described on-off element is opened, to the described coil power supply that is connected with on-off element.
11. speed of a motor vehicle analogue means according to claim 10 is characterized in that, described power supply is rechargeable battery or dry cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200735125U CN201435153Y (en) | 2009-06-05 | 2009-06-05 | Vehicle-speed analog device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200735125U CN201435153Y (en) | 2009-06-05 | 2009-06-05 | Vehicle-speed analog device |
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| CN201435153Y true CN201435153Y (en) | 2010-03-31 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198664A (en) * | 2013-03-14 | 2013-07-10 | 深圳颂泰科技有限公司 | Method and device of testing on vehicle detector |
| CN103616189A (en) * | 2013-11-28 | 2014-03-05 | 温州市计量技术研究院 | Checking device of traffic red light running system and checking method thereof |
| CN104698415A (en) * | 2013-12-05 | 2015-06-10 | 感知技术无锡有限公司 | Magnetic sensitive vehicle detector quality detection method, device and system |
| CN106556720A (en) * | 2016-11-10 | 2017-04-05 | 江苏省计量科学研究院 | Method of the simulating vehicle by ground sensing coil velocity measurement system |
-
2009
- 2009-06-05 CN CN2009200735125U patent/CN201435153Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198664A (en) * | 2013-03-14 | 2013-07-10 | 深圳颂泰科技有限公司 | Method and device of testing on vehicle detector |
| CN103616189A (en) * | 2013-11-28 | 2014-03-05 | 温州市计量技术研究院 | Checking device of traffic red light running system and checking method thereof |
| CN104698415A (en) * | 2013-12-05 | 2015-06-10 | 感知技术无锡有限公司 | Magnetic sensitive vehicle detector quality detection method, device and system |
| CN104698415B (en) * | 2013-12-05 | 2019-08-20 | 感知技术无锡有限公司 | Magnetosensitive wagon detector quality inspection method, apparatus and system |
| CN106556720A (en) * | 2016-11-10 | 2017-04-05 | 江苏省计量科学研究院 | Method of the simulating vehicle by ground sensing coil velocity measurement system |
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Effective date of registration: 20170905 Address after: No. 555 Kang Hangzhou Science Park of Zhejiang province Binjiang District Qianmo road 310053 Patentee after: Hangzhou Hikvision Digital Technology Co., Ltd. Address before: 201203 Shanghai Zhangjiang hi tech park, 1690 No. 3 Cailun Road, building second, third storey Patentee before: Gaodewei Intelligent Traffic System Co., Ltd., Shanghai |
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Effective date of registration: 20190620 Address after: 201203 2nd Floor, No. 77-78, 887 Lane, Zuchong Road, Zhangjiang High-tech Park, Pudong New Area, Shanghai Patentee after: Gaodewei Intelligent Traffic System Co., Ltd., Shanghai Address before: 310053 Haikang Science and Technology Park, 555 Qianmo Road, Binjiang District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Hikvision Digital Technology Co., Ltd. |
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Granted publication date: 20100331 |
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