CN2733378Y - Safety vehicle radar - Google Patents
Safety vehicle radar Download PDFInfo
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- CN2733378Y CN2733378Y CN 200420085132 CN200420085132U CN2733378Y CN 2733378 Y CN2733378 Y CN 2733378Y CN 200420085132 CN200420085132 CN 200420085132 CN 200420085132 U CN200420085132 U CN 200420085132U CN 2733378 Y CN2733378 Y CN 2733378Y
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- amplifying circuit
- ultrasonic sensor
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Abstract
The utility model relates to a device which can indicate if the vehicle parking is safe, in particular to a safety vehicle radar which can distinguish if concave pits exist around the vehicle or if the sensitivity of the ultrasonic sensor is over low. The utility model comprises an ultrasonic sensor which is arranged on the external edge of the vehicle, a central control unit and an alarm which are serially electrically connected via corresponding signal wire, and a magnify circuit which can adjust the magnify multiple is added, which is provided with a digital potentiometer or an adjustable feedback resistor. With adjusting the low and high of the magnify multiple, the utility model can detect if obstacle or concave pits exist or if the sensitivity of the sensor is over low, and therefore, the utility model can provide more reliable alarming information to drivers.
Description
Technical field
The utility model relates to a kind of device of indicating automotive safety to stop, and whether barrier is arranged around can discerning car, can discern especially whether the whether low excessively automotive safety radar of sensitivity of recessed hole or ultrasonic sensor is arranged around the car.
Background technology
At present, known automotive safety radar is the parking warning system that is formed by connecting by corresponding connecting line by ultrasonic sensor (if after ultrasonic sensor only was installed in car, then the automotive safety radar claimed radar for backing car again), central controller (containing electronic circuit and software program), attention device (comprising display and loudspeaker).System adopts the ultrasonic ranging principle, under the control of central controller, by the sensor emission ultrasonic signal, when running into barrier, produce echoed signal, receive echoed signal is judged barrier after central controller amplification and data processing position by sensor again, send alarm signal by attention device then, the driver is in time warned.But, but not having barrier around the car but recessed hole is arranged or have barrier ultrasonic sensor (being commonly called as probe) sensitivity to cross when low, the caution of will not reporting to the police of parking warning system is so still exist security hidden trouble during parking.
Summary of the invention
The technical matters that is solved
Can not detect in order to overcome existing parking radar whether the whether low excessively deficiency of sensitivity of recessed hole or ultrasonic sensor (being commonly called as probe) is arranged around the car, the utility model provides a kind of automotive safety radar, this automotive safety radar can not only detect the distance of car peripheral obstacle, and can detect and whether recessed hole or ultrasonic sensor (being commonly called as probe) are arranged around the car whether sensitivity is low excessively.
Technical scheme
The technical scheme that its technical matters that solves the utility model adopts is, when the detecting obstacles thing, detect ultrasonic sensor (being commonly called as probe) and receive having or not of echoed signal that ground S1 (8) reflects by increasing the 3rd amplifying circuit (14) that can survey ground S1 (8), whether sensitivity is low excessively thereby come whether recessed hole or ultrasonic sensor (being commonly called as probe) are arranged around the inspection vehicle.Its principle of work is divided three introductions, 1. the ultrasonic sensor principle of work of transceiver; 2. the installation of ultrasonic sensor; 3. embodiment of the present utility model.
1. the ultrasonic sensor principle of work (Fig. 2) of transceiver is transmitted and hyperacoustic velocity of propagation v because ultrasound wave is a straight line, and promptly the speed of sound can be regarded as changeless constant, so the distance X=v*t/2 of barrier.Wherein, t is that ultrasonic sensor begins to clock after having launched ultrasound wave and receives the used time of echoed signal that barrier reflects, and t can obtain by the central controller timing, thereby can calculate the distance X of barrier.Because the working range of ultrasonic sensor is radial, certain operating angle is arranged again.When adopting angle is the ultrasonic sensor of (β 2+ β 2) degree, identical barrier and ultrasonic sensor equally apart from the time, the angle of barrier and ultrasonic sensor central shaft is during greater than β 2 (is drift angle with the ultrasonic sensor), ultrasonic sensor to the detection sensitivity of barrier much smaller than barrier in angle β 2 scopes with interior detection sensitivity.
2. the installation of ultrasonic sensor (Fig. 1), ultrasonic sensor is installed in the outermost edge of car, for example bumper, a car left side or the right flank (if after only being installed in car, then the automotive safety radar claims radar for backing car again) before or after the car.Ultrasonic sensor central shaft and wheel ground plane have one angle β 1 is installed, the distance of ultrasonic sensor and wheel ground plane is L1 (6), is to survey the ground S1 (8) of pit down apart from the ground between ultrasonic sensor L1 and the L2 (7) (L2 is the sensor of setting and judges the ultimate range on pit ground down).
3. the technical solution of the utility model is to increase the 3rd amplifying circuit (14) of surveying ground S1 (8) in central controller.Utilize the ultrasonic sensor detection operations that the characteristics of angular characteristics and the installation of ultrasonic sensor are arranged.On the one hand ground S1 (8) and the angle of ultrasonic sensor central shaft be greater than β 2, so ultrasonic sensor is far smaller than the detection sensitivity of barrier in angle β 2 scopes the detection sensitivity of ground S1 (8).Under normal circumstances ground S1 exists all the time on the other hand, in order to guarantee do not having not do the caution of reporting to the police under the situation of barrier, so, the warning thresholding of detecting obstacles thing is greater than A1, A1 is that ultrasonic sensor detects after the echoed signal that ground return returns through amplifying circuit amplification conditions at different levels is that the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance is made as low multiple when amplifying] after maximal value, promptly be made as under the condition that low multiple amplifies and survey barrier, just do the caution of reporting to the police when having only the echoed signal that receives when ultrasonic sensor greater than A1 at the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance.The utility model is on the basis of detecting obstacles thing, increase in the 3rd amplifying circuit (14) by in central controller, increase surveying ground S1 (8) and the software program software program of surveying ground S1 judged whether under pit or ultrasonic sensor sensibility low excessively.Its circuit structure principle and software flow explanation are as follows respectively:
3.1 circuit structure such as Fig. 3 of the judgement that the judgement of the barrier of safe radar and following pit or ultrasonic sensor sensibility are low excessively in this programme, ultrasonic sensor links to each other with central controller by signal wire, and central controller links to each other with attention device by signal wire.In the central controller except common first (13), second (15) amplifying circuit and carrying out outside the determining device (17) of barrier judgment, increase the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance be used for the separate detection barrier and survey down pit or ultrasonic sensor sensibility low excessively, its input end links to each other with first amplifying circuit (13) output terminal, its output terminal links to each other with the input end of second amplifying circuit (15), and the input end of second amplification circuit output end and determining device (17) or the input end that is integrated in decision circuitry among the CPU (18) link to each other.According to can first amplifying circuit (13) or second amplifying circuit (14) in the different circuit design central controllers, determining device (17) can be a decision circuitry integrated among the CPU, the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance is the circuit that the utility model increases, and specifically sees embodiment.Circuit in first amplifying circuit (13), second amplifying circuit (15) can be that the one-level amplification also can be a multistage amplifier circuit (Fig. 4)
3.1.1 the judgement of barrier be the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance be made as low multiple when amplifying by ultrasonic sensor, first amplifying circuit (13), the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance, second amplifying circuit (15), determining device (17) and CPU (18) searching are partly finished, according to can first amplifying circuit or second amplifying circuit in the different circuit design central controllers, the warning thresholding of barrier judgment is made as that (A1 is made as low multiple when amplifying at the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance greater than A1, when the maximal value after the echoed signal that ultrasonic sensor receives ground is amplified through whole amplifying circuit) having only the echoed signal that receives when ultrasonic sensor to amplify the back greater than A1 through whole amplifying circuit, central controller just has the caution of barrier to handle.The warning thresholding of barrier judgment is made as A1, because ground is to exist all the time under the normal condition, if thresholding is less than A1, that will be used as ground the barrier caution of reporting to the police, that is to say can't operate as normal, so the warning thresholding of barrier judgment is greater than A1;
3.1.2 the utility model, to down pit or the low excessively judgement of ultrasonic sensor sensibility be made as at the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance high multiple when amplifying by ultrasonic sensor, first amplifying circuit (13), the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance, second amplifying circuit (15), determining device (17) and CPU (18) searching are finished, wherein first amplifying circuit or second amplifying circuit can according to different circuit design, determining device can be CPU integrated decision circuitry, the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance is the circuit that the utility model increases, and specifically sees embodiment.Following pit or ultrasonic sensor sensibility are crossed the low thresholding of judging and are made as B1 (B1 is made as high multiple when amplifying at the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance, minimum value after the echoed signal that ultrasonic sensor receives S1 ground is amplified through whole amplifying circuit), when ultrasonic sensor does not receive echoed signal or echoed signal when amplifying the back less than B1 through whole amplifying circuit, illustrate and do not detect ground S1, thereby can judge that ground does not exist or ultrasonic sensor sensibility is low excessively, at this moment central controller has the low excessively caution of recessed hole or ultrasonic sensor sensibility to handle, when preferentially having the caution of barrier to report to the police at 0 central controller when between L2 barrier being arranged.
3.2 the software program of the judgement that the judgement of barrier and following pit or ultrasonic sensor sensibility are low is excessively judged:
3.2.1 the judgement of obstacle distance can be by formula X=v*t/2.Wherein, v is that the speed of propagating in air of sound can be regarded as constant; T is that ultrasonic sensor begins to clock after having launched ultrasound wave and receives the used time of echoed signal that barrier reflects, and is variable.Therefore, the time t of the echoed signal that can reflect by the disturbance in judgement thing distance X of coming the disturbance in judgement thing.For example, judge at L1 (6) between L2 (7) (L1, L2 see Fig. 1), whether barrier is arranged, can be converted at time t1 (t1=2*L1/v) whether echoed signal is arranged in the time to t2 (t2=2*L2/v).
3.2.2 the judgement of barrier and following pit or the low excessively judgement of ultrasonic sensor sensibility.The utility model is to have increased when normal disturbance in judgement thing surveying in L2 distance having or not with interior ground S1, judged whether down that pit or ultrasonic sensor sensibility are low excessively, promptly judged whether echoed signal in the time, three kinds of situations arranged at time t2 (t2=2*L2/v):
3.2.2.1 the amplifying circuit that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance in the time at time t2 (t2=2*L2/v) is made as that low multiple amplifies or high multiple amplifies and all do not have echoed signal or echoed signal less than B1, then has the low excessively warning of following pit or ultrasonic sensor sensibility to warn.
3.2.2.2 it still is the echoed signal that high power is amplified to be had simultaneously greater than A1 that the amplifying circuit that no matter contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance in the time at time t2 (t2=2*L2/v) is made as that low power amplifies, and then carries out the barrier caution of reporting to the police.
3.2.2.3 in time t2 (t2=2*L2/v), only contain the amplifying circuit of the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance be made as high multiple when amplifying echoed signal greater than B1, the caution of then not reporting to the police, proceed to arrive t3 (t3=2*L3/v after t2 (t2=2*L2/v) time, L3 be the maximum that may detect barrier from, be generally 2-3 rice) before barrier judgment.
Beneficial effect
The beneficial effects of the utility model are: when guaranteeing the detecting obstacles thing, whether independently survey method that ground S1 (8) has or not by one and detect and whether recessed hole or ultrasonic sensor are arranged whether sensitivity is low excessively, so promptly can detect also can detect when whether barrier being arranged has recessed hole or ultrasonic sensor sensibility low excessively.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the installation diagram of ultrasonic sensor.
Fig. 2 is the fundamental diagram of ultrasonic sensor.
Fig. 3 is a structured flowchart of the present utility model.
In Fig. 4 first amplifying circuit (13), second amplifying circuit (15) electrical connection graph.
Fig. 5 is first embodiment that circuit connects in the central controller of the present utility model.
Fig. 6 is second embodiment that circuit connects in the central controller of the present utility model.
Among the figure, 1. ultrasonic sensor; 2. ultrasonic sensor central shaft; 3. the plane parallel with the wheel ground plane; 4. angle β 1 is the downward angle of ultrasonic sensor central shaft and wheel ground plane, 0 degree≤β, 1≤10 degree; 5. angle β 2 is angles of ultrasonic sensor high sensitivity maximum magnitude and central shaft; 6.L1 be the distance of ultrasonic sensor and wheel ground plane; 7.L2 equal L1+0.3 rice; 8.S1 be apart from the ground between ultrasonic sensor L1 and the L2; 9.T connect the shielded signal wire of ultrasonic sensor and central controller; 10. central controller; 11. the signal wire of central controller and attention device; 12. warning attention device; 13. first amplifying circuit; 14. contain the 3rd amplifying circuit of the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance; 15. second amplifying circuit; 16. enlargement factor is provided with line; 17. determining device; 18. central processor CPU; 19. radiating circuit; 20. power circuit;
Embodiment
In Fig. 2, adopting transceiver and operating angle is the ultrasonic sensor of (β 2+ β 2) degree, and ultrasonic sensor is installed in the outermost edge of car, downward angle β 1,0 degree≤β 1≤10 degree of ultrasonic sensor central shaft and wheel ground plane.In the embodiment of Fig. 5, Fig. 6, the installation of ultrasonic sensor all adopts the method to install.
Among the embodiment of Fig. 5, be equivalent to first amplifying circuit (13), the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance, second amplifying circuit (15), determining device (17) order are linked to each other.
The installation of ultrasonic sensor such as Fig. 1, ultrasonic sensor (1) is installed in the outward flange of car, be connected with central controller (10) by shielded signal wire (9), central controller (10) links to each other with warning attention device (12) with the signal wire (11) of attention device by central controller; In central controller (10), radiating circuit (19) links to each other with ultrasonic sensor (1) by shielded signal wire (9), power circuit (20) links to each other with each circuit, and central processor CPU (18) links to each other with warning attention device (12) by the signal wire (11) of attention device.
Ultrasonic sensor (1) links to each other with the input end of first amplifying circuit (13) by shielded signal wire (9), the input end of the 3rd amplifying circuit (14) of the adjustable enlargement factor that the output terminal of first amplifying circuit (13) is adjustable with containing digital regulation resistance or feedback resistance links to each other, the output terminal that contains the 3rd amplifying circuit (14) of the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance links to each other with the input end of second amplifying circuit (15), the output terminal of second amplifying circuit (15) links to each other with the input end of determining device (17), and the output terminal of determining device (17) links to each other with central processor CPU (18).
Among the embodiment of Fig. 6, the installation of ultrasonic sensor such as Fig. 1, ultrasonic sensor (1) is installed in the outward flange of car, be connected with central controller (10) by shielded signal wire (9), central controller (10) links to each other with warning attention device (12) with the signal wire (11) of attention device by central controller; In central controller (10), radiating circuit (19) links to each other with ultrasonic sensor (1) by shielded signal wire (9), power circuit (20) links to each other with each circuit, and central processor CPU (18) links to each other with warning attention device (12) by the signal wire (11) of attention device.
Ultrasonic sensor (1) links to each other with the input end of first amplifying circuit (13) by shielded signal wire (9), the input end of the 3rd amplifying circuit (14) of the adjustable enlargement factor that the output terminal of first amplifying circuit (13) is adjustable with containing digital regulation resistance or feedback resistance links to each other, the output terminal that contains the 3rd amplifying circuit (14) of the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance links to each other with the input end of determining device (17), and the output terminal of determining device (17) links to each other with central processor CPU (18).
Claims (6)
1. automotive safety radar, by the outer peripheral ultrasonic sensor that is installed in car, central controller, alarm is electrically connected composition in order by corresponding signal lines, it is characterized in that: the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance is arranged in central controller.
2. the described safe radar of claim 1, it is characterized in that: but the input end of the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance of separate detection obstacle and thing ground (8) be connected with the output terminal of sensor (1) or first amplifying circuit (13), output terminal directly links to each other with the input end of determining device (17) with second amplifying circuit (15) or output terminal.
3. the described safe radar of claim 1, it is characterized in that: the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance is arranged in central controller, can the separate detection barrier and survey down pit or transducer sensitivity low excessively.
4. the described safe radar of claim 3, it is characterized in that: but the input end of the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance of separate detection obstacle and thing ground (8) is connected with the output terminal of sensor (1) or first amplifying circuit (13), output terminal links to each other with the input end of second amplifying circuit (15), the output terminal of second amplifying circuit (15) links to each other with the input end of determining device (17), and the output terminal of determining device (17) is connected with central processor CPU (18).
5. the described safe radar of claim 3, it is characterized in that: but the input end of the 3rd amplifying circuit (14) that contains the adjustable adjustable enlargement factor of digital regulation resistance or feedback resistance of separate detection obstacle and thing ground (8) is connected with the output terminal of sensor (1) or first amplifying circuit (13), output terminal links to each other with the input end of determining device (17), and the output terminal of determining device (17) is connected with central processor CPU (18).
6. claim 1,2,3, one of 4 described safe radars, it is characterized in that: the mounting means of sensor (1) is that the downward angle β 1 of its central shaft and wheel ground plane is 0 degree≤β, 1≤10 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420085132 CN2733378Y (en) | 2004-08-10 | 2004-08-10 | Safety vehicle radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420085132 CN2733378Y (en) | 2004-08-10 | 2004-08-10 | Safety vehicle radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2733378Y true CN2733378Y (en) | 2005-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420085132 Expired - Fee Related CN2733378Y (en) | 2004-08-10 | 2004-08-10 | Safety vehicle radar |
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|---|---|
| CN (1) | CN2733378Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147467A (en) * | 2011-01-10 | 2011-08-10 | 同致电子科技（昆山）有限公司 | Automatic adjustment circuit system for sensitivity of parking sensor probe |
| EP2762919A3 (en) * | 2013-02-01 | 2015-04-29 | Valeo Schalter und Sensoren GmbH | Method for detecting obstacles in the path of a vehicle by means of an ultrasonic sensor |
| CN110058238A (en) * | 2019-04-09 | 2019-07-26 | 惠州市德赛西威智能交通技术研究院有限公司 | A kind of reversing radar ground cliff of displacement recognition methods based on millimeter wave |
-
2004
- 2004-08-10 CN CN 200420085132 patent/CN2733378Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147467A (en) * | 2011-01-10 | 2011-08-10 | 同致电子科技（昆山）有限公司 | Automatic adjustment circuit system for sensitivity of parking sensor probe |
| EP2762919A3 (en) * | 2013-02-01 | 2015-04-29 | Valeo Schalter und Sensoren GmbH | Method for detecting obstacles in the path of a vehicle by means of an ultrasonic sensor |
| CN110058238A (en) * | 2019-04-09 | 2019-07-26 | 惠州市德赛西威智能交通技术研究院有限公司 | A kind of reversing radar ground cliff of displacement recognition methods based on millimeter wave |
| CN110058238B (en) * | 2019-04-09 | 2021-02-02 | 惠州市德赛西威智能交通技术研究院有限公司 | Reversing radar ground cliff recognition method based on millimeter waves |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |