CN105717836A - Parking distance measurement control method and device - Google Patents
Parking distance measurement control method and device Download PDFInfo
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- CN105717836A CN105717836A CN201610076653.7A CN201610076653A CN105717836A CN 105717836 A CN105717836 A CN 105717836A CN 201610076653 A CN201610076653 A CN 201610076653A CN 105717836 A CN105717836 A CN 105717836A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2015/932—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles for parking operations
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- Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Automation & Control Theory (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Abstract
The invention provides a parking distance measurement control method and device. The device comprises a GPS module and an information processing unit. The GPS module is used for obtaining satellite information, generating GPS information according to the satellite information and sending the GPS information to the information processing unit. The information processing unit is used for reading ground speed information from the GPS information, comparing the ground speed information with a speed threshold, obtaining a comparison result, and controlling the starting and stopping of a parking distance measurement process according to the comparison result. By adopting the parking distance measurement control method and device, the vehicle driving speed can be effectively read, the influences of vehicle types are avoided, and false starting of the parking distance measurement process is prevented.
Description
Technical field
The present invention relates to ancillary technique field of parking, particularly relate to one and park range finding control method and device.
Background technology
Parking, (the national standard title of GB/T21436-2008 is range finding alarming device of parking to range finding alarming device, popular it is called parking radar, it is located at the parking radar of the tailstock, is commonly referred to as radar for backing car) as the auxiliary device of automotive safety, it is used widely in automobile industry.The method that most of range finding alarming device of parking adopts ultrasonic ranging, it is achieved the distance early warning of process of parking.Owing to ultrasonic propagation velocity is extremely slow, and decay is exceedingly fast in atmosphere, so ultrasonic ranging is suitable only for short distance (being usually no more than 3m), measurement process at a slow speed, applicable detection is parked middle preceding object thing, reaches the purpose of range finding and early warning.
But, in nature, ultrasound wave is widely present, automobile also contains ultrasound wave composition at the harmonic wave of the hot-tempered initiation of high speed traveling apoplexy, if preposition range finding alarming device of parking is always in driving, wrong report will certainly occur, disperse driver attention, there is potential safety hazard, shorten the life-span of ultrasonic sensor, moreover also without always on preposition range finding alarming device of parking in high speed traveling.
The way that the preposition opening and closing parking range finding alarming device are a kind of very science is controlled according to speed height, namely preposition range finding alarming device of parking is started lower than setting speed (being usually 15Km/h), close preposition range finding alarming device of parking higher than setting speed, the interference in most driving conditions can be avoided.At present, the method adopted has two kinds: method one, directly read the rate signal of speed control lines, and then control the opening and closing of preposition range finding alarming device of parking, current car load factory adopts this way, substantially hardware cost need not be increased for car load factory, simple and be easily achieved.But, vehicle varies, and implements comparatively difficulty in the rear market of automobile, for instance: automobile decoration work is difficult to find speed control lines.Method two, reads the rate signal in OBD interface, and then controls the opening and closing of preposition range finding alarming device of parking.But, due to agreement nonstandard in OBD interface, failing to accomplish that whole car is general, often to divide vehicle, this brings the worry of many stocks to retail shop.At present, also some slightly old vehicle does not just have OBD interface at all, and these cars cannot install the preposition range finding alarming device of parking of such speed control.Even if additionally, automobile is suitable for installing OBD interface, there is also and tie up interface, affecting the conventional use of OBD interface, the extra parts increased cause product reliability to reduce.
Summary of the invention
Range finding control method and device it is desirable to provide one is parked, it is possible to effectively read automobile driving speed, do not affected by vehicle, it is prevented that ranging process of parking opens by mistake and opens.
First aspect, the present invention provides one to park range finding control method, and the method specifically comprises the following steps that
Step S1: obtain satellite information, generates GPS information according to satellite information.
Step S2: read ground speed information from GPS information.
Step S3: ground speed information and threshold speed are contrasted, obtains comparing result.
Step S4: according to comparing result, controls to be turned on and off ranging process of parking.
Further, in step s 4, if ground speed information is more than threshold speed, then ranging process of parking is closed；If ground speed information is less than or equal to threshold speed, then open ranging process of parking.
Based on above-mentioned range finding control method embodiment of arbitrarily parking, further, the method specifically includes:
Step S1:GPS module obtains satellite information, generates GPS information according to satellite information.
Step S2: the first processing module reads ground speed information from GPS information.
Ground speed information and threshold speed are contrasted by the step S3: the first processing module, obtain comparing result.
Step S4: the first processing module, according to comparing result, sends and is turned on and off instruction, controls to be turned on and off ranging process of parking.
Based on above-mentioned range finding control method embodiment of arbitrarily parking, further, the method specifically includes:
Step S1:GPS module obtains satellite information, generates GPS information according to satellite information.
Step S2: the first processing module reads ground speed information from GPS information.
Ground speed information and threshold speed are contrasted by the step S3: the first processing module, obtain comparing result, send comparing result to the second processing module.
Step S4: the second processing module, according to comparing result, sends and is turned on and off instruction, controls to be turned on and off ranging process of parking.
Based on above-mentioned range finding control method embodiment of arbitrarily parking, further, in step sl, if failing effectively to obtain satellite information, the method also includes: the first processing module or the second processing module open ranging process of parking.
Further, GPS module sends the first instruction to the first processing module, and the first instruction is used for pointing out GPS module to fail effectively to obtain satellite information.
Second aspect, the present invention provides one to park ranging controlling apparatus, and this device includes GPS module and information process unit, and GPS module is used for obtaining satellite information, generates GPS information according to satellite information, and sends GPS information to information process unit.Ground speed information and threshold speed, for reading ground speed information from GPS information, are contrasted, obtain comparing result by information process unit, according to comparing result, control to be turned on and off ranging process of parking.
Further, information process unit includes the first processing module and the second processing module, and ground speed information and threshold speed, for reading ground speed information from GPS information, are contrasted by the first processing module, obtain comparing result, send comparing result to the second processing module.Second processing module, for according to comparing result, sending and be turned on and off instruction, controls to be turned on and off ranging process of parking.
Further, the first processing module is the single-chip microcomputer in display, and the second processing module is the single-chip microcomputer in controller.
Based on above-mentioned ranging controlling apparatus embodiment of arbitrarily parking, further, when failing effectively to obtain satellite information, information process unit is additionally operable to send open command, opens ranging process of parking.
Range finding control method and the device of parking provided by the invention, obtains satellite information by GPS module, generates GPS information according to satellite information, and sends GPS information to information process unit.Information process unit obtains ground speed information from GPS information, can effectively read the travel speed of automobile, without obtaining automobile driving speed from the speed control lines of automobile, avoid a difficult problem for hunting speed control line, without there is the problem that OBD interface is tied up, it is to avoid reliability reduces, even without the vehicle of OBD interface, can also effectively obtain automobile driving speed, not by the impact of vehicle.After obtaining ground speed information, ground speed information and threshold speed are contrasted by information process unit, according to comparing result, control to be turned on and off ranging process of parking, and ensure and effectively open ranging process of parking.
Therefore, range finding control method and the device of parking provided by the invention, it is possible to effectively read automobile driving speed, do not affected by vehicle, it is prevented that ranging process of parking opens by mistake and opens.
Accompanying drawing explanation
Fig. 1 is first range finding control method flow chart of parking provided by the invention；
Fig. 2 is second range finding control method flow chart of parking provided by the invention；
Fig. 3 is the 3rd range finding control method flow chart of parking provided by the invention；
Fig. 4 is a ranging controlling apparatus structural representation of parking provided by the invention；
Fig. 5 is that provided by the invention another is parked ranging controlling apparatus structural representation；
Fig. 6 is a preposition range finding alarming device structural representation of parking provided by the invention；
Fig. 7 is a preposition range finding alarming device job step flow chart of parking provided by the invention.
Detailed description of the invention
The present invention is further illustrated below by specific embodiment, it should be understood, however, that, these embodiments are only used for the use specifically described in more detail, and are not to be construed as limiting in any form the present invention.
First aspect, the invention provides one and parks range finding control method, be described as follows:
The present embodiment provides one to park range finding control method, and in conjunction with Fig. 1, the method specifically comprises the following steps that
Step S11: obtain satellite information, generates GPS information according to satellite information.
Step S12: read ground speed information from GPS information.
Step S13: ground speed information and threshold speed are contrasted, obtains comparing result.
Step S14: according to comparing result, controls to be turned on and off ranging process of parking.
The range finding control method of parking that the present embodiment provides, by obtaining satellite information, generates GPS information according to satellite information, obtains ground speed information from GPS information.Ground speed information and automobile are relative to the travel speed on ground.The method is adopted can effectively to read the travel speed of automobile, without obtaining automobile driving speed from the speed control lines of automobile, avoid a difficult problem for hunting speed control line, without there is the problem that OBD interface is tied up, reliability is avoided to reduce, vehicle even without OBD interface, it is also possible to effectively obtain automobile driving speed, not by the impact of vehicle.After obtaining ground speed information, the method also includes contrast step, ground speed information and threshold velocity is contrasted, and according to comparing result, controls to be turned on and off ranging process of parking, it is ensured that effective unlatching of ranging process of parking.The present embodiment parks range finding control method suitable in parking range finding alarming device, it is particularly suited for preposition range finding alarming device of parking, the ranging process of parking of range finding alarming device of ensureing to park effectively is opened, and provides more facility, improve reliable degree when parking for user vehicle.Therefore, the range finding control method of parking that the present embodiment provides, it is possible to effectively read automobile driving speed, do not affected by vehicle, it is prevented that ranging process of parking opens by mistake and opens.
Preferably, the present invention park range finding one embodiment of control method step S4 in, according to comparing result, control to be turned on and off ranging process of parking, specifically include: if ground speed information is more than threshold speed, then close ranging process of parking；If ground speed information is less than or equal to threshold speed, then open ranging process of parking.When automobile driving speed is higher than threshold speed, it was shown that automobile is not in the state of parking, or is in high-speed travel state, it is not necessary to open ranging process of parking.When automobile driving speed is less than or equal to threshold speed, the present embodiment range finding control method of parking is opened and is parked ranging process, measures and travels at a slow speed and in the scope of close together, if there is barrier, it is ensured that safety of parking.This enforcement park range finding control method adopt ultrasonic sensor send hyperacoustic mode, in short range, measure distance or the direction of barrier.When automobile driving speed is less than or equal to threshold speed, ultrasound wave launched by ultrasonic sensor, it is possible to ensures in the effective range that ultrasonic sensor normally detects, and can extend the service life of ultrasonic sensor.
The present invention parks second embodiment that range finding control method provides, and each step, with reference to Fig. 2, specifically includes:
Step S21:GPS module obtains satellite information, generates GPS information according to described satellite information.
Step S22: the first processing module reads ground speed information from GPS information.
Ground speed information and threshold speed are contrasted by the step S23: the first processing module, obtain comparing result.
Step S24: the first processing module, according to comparing result, sends and is turned on and off instruction, controls to be turned on and off ranging process of parking.
The range finding control method of parking that the present embodiment provides, obtains satellite information by GPS module, generates GPS information according to satellite information, and the first processing module obtains ground speed information from GPS information.Ground speed information and automobile are relative to the travel speed on ground.The method is adopted can effectively to read the travel speed of automobile, without obtaining automobile driving speed from the speed control lines of automobile, avoid a difficult problem for hunting speed control line, without there is the problem that OBD interface is tied up, reliability is avoided to reduce, vehicle even without OBD interface, it is also possible to effectively obtain automobile driving speed, not by the impact of vehicle.After the first processing module obtains ground speed information, the method also includes contrast step, and ground speed information and threshold velocity are contrasted by the first processing module.According to comparing result, the first processing module sends and is turned on and off instruction, controls to be turned on and off range finding alarming device measurement process of parking, it is ensured that effective unlatching of ranging process of parking.The present embodiment parks range finding control method suitable in parking range finding alarming device, it is particularly suited for preposition range finding alarming device of parking, the ranging process of parking of range finding alarming device of ensureing to park effectively is opened, and provides more facility, improve reliable degree when parking for user vehicle.Therefore, the range finding control method of parking that the present embodiment provides, it is possible to effectively read automobile driving speed, do not affected by vehicle, it is prevented that ranging process of parking opens by mistake and opens.
Preferably, in the step s 21, if failing effectively to obtain satellite information, the method also includes: the first processing module opens ranging process of parking.Preferably, failing effectively to obtain satellite information can with being expressed as method, and the method includes: GPS module can send the first instruction to the first processing module, and the first instruction is used for pointing out GPS module to fail effectively to obtain satellite information；Or first processing module do not receive GPS information in the given time, the numerical value that the scheduled time can obtain according to emulation experiment, or determine according to modes such as the empirical values generally adopted；Or first processing module cannot obtain ground speed information from reception information.Now, even if failing to obtain satellite information, the method also is able to unlatching and parks ranging process, it is prevented that vehicle collision barrier, reduces potential safety hazard.
The present invention parks the 3rd embodiment that range finding control method provides, and each step, with reference to Fig. 3, specifically includes:
Step S31:GPS module obtains satellite information, generates GPS information according to satellite information.
Step S32: the first processing module reads ground speed information from GPS information.
Ground speed information and threshold speed are contrasted by the step S33: the first processing module, obtain comparing result, send comparing result to the second processing module.
Step S34: the second processing module, according to comparing result, sends and is turned on and off instruction, controls to be turned on and off ranging process of parking.
The range finding control method of parking that the present embodiment provides, obtains satellite information by GPS module, generates GPS information further according to satellite information, and the first processing module obtains ground speed information from GPS information.Ground speed information and automobile are relative to the travel speed on ground.The method is adopted can effectively to read the travel speed of automobile, without obtaining automobile driving speed from the speed control lines of automobile, avoid a difficult problem for hunting speed control line, without there is the problem that OBD interface is tied up, reliability is avoided to reduce, vehicle even without OBD interface, it is also possible to effectively obtain automobile driving speed, not by the impact of vehicle.After the first processing module obtains ground speed information, the method also includes contrast step, and ground speed information and threshold velocity are contrasted by the first processing module, then sends comparing result to the second processing module.According to comparing result, the second processing module sends and is turned on and off instruction, controls to be turned on and off ranging process of parking, it is ensured that effective unlatching of ranging process of parking.The present embodiment parks range finding control method suitable in parking range finding alarming device, it is particularly suited for preposition range finding alarming device of parking, the ranging process of parking of range finding alarming device of ensureing to park effectively is opened, and provides more facility, improve reliable degree when parking for user vehicle.Therefore, the range finding control method of parking that the present embodiment provides, it is possible to effectively read automobile driving speed, do not affected by vehicle, it is prevented that ranging process of parking opens by mistake and opens.
Preferably, in step S31, if failing effectively to obtain satellite information, the method also includes: the second processing module opens ranging process of parking.Preferably, failing effectively to obtain satellite information can with being expressed as method, and the method includes: GPS module sends the first instruction to the first processing module, and the first instruction is used for pointing out GPS module to fail effectively to obtain satellite information.Or first processing module do not receive GPS information in the given time, the numerical value that the scheduled time can obtain according to emulation experiment, or determine according to modes such as the empirical values generally adopted；Or first processing module cannot obtain ground speed information from reception information.First instruction is transmitted to the second processing module by the first processing module again, after the second processing module receives this instruction, opens ranging process of parking.Now, even if failing to obtain satellite information, the method also is able to unlatching and parks ranging process, it is prevented that vehicle collision barrier, reduces potential safety hazard.
Second aspect, the invention provides one and parks ranging controlling apparatus, be described as follows:
The present embodiment provides one to park ranging controlling apparatus, and in conjunction with Fig. 4, this device includes GPS module 41 and information process unit 42, and GPS module 41 is used for obtaining satellite information, generates GPS information according to satellite information, and sends GPS information to information process unit 42.Described ground speed information and threshold speed, for reading ground speed information from described GPS information, are contrasted, obtain comparing result by information process unit 42, according to described comparing result, control to be turned on and off ranging process of parking.The ranging controlling apparatus of parking that the present embodiment provides, obtains satellite information by GPS module 41, generates GPS information according to satellite information, and information process unit 42 obtains ground speed information from GPS information.Ground speed information and automobile are relative to the travel speed on ground.This device is adopted can effectively to read the travel speed of automobile, without obtaining automobile driving speed from the speed control lines of automobile, avoid a difficult problem for hunting speed control line, without there is the problem that OBD interface is tied up, reliability is avoided to reduce, vehicle even without OBD interface, it is also possible to effectively obtain automobile driving speed, not by the impact of vehicle.After obtaining ground speed information, the information process unit 42 of this device is additionally operable to contrast ground speed information and threshold velocity, according to comparing result, controls to be turned on and off ranging process of parking, thus, it is ensured that effective unlatching of ranging process of parking.The present embodiment park ranging controlling apparatus adopt park range finding alarming device realize, or improved by preposition range finding alarming device of parking and realize, the ranging process of parking of range finding alarming device of ensureing to park effectively is opened, and provides more facility, improve reliable degree when parking for user vehicle.Therefore, the ranging controlling apparatus of parking that the present embodiment provides, it is possible to effectively read automobile driving speed, do not affected by vehicle, it is prevented that ranging process of parking opens by mistake and opens.
Preferably, the present embodiment park range finding alarming device opening/shutting controller information process unit 42 include the first processing module 51 and the second processing module 52, in conjunction with Fig. 5, first processing module 51 for reading ground speed information from described GPS information, described ground speed information and threshold speed are contrasted, obtain comparing result, send described comparing result extremely described second processing module 52.Second processing module 52, for according to described comparing result, sending and be turned on and off instruction, controls to be turned on and off ranging process of parking.If ground speed information is more than threshold speed, then close ranging process of parking；If ground speed information is less than or equal to threshold speed, then open ranging process of parking.When automobile driving speed is higher than threshold speed, it was shown that automobile is not in the state of parking, or is in high-speed travel state, it is not necessary to open ranging process of parking.When automobile driving speed is less than or equal to threshold speed, the present embodiment ranging controlling apparatus of parking is opened and is parked ranging process, measures and travels at a slow speed and in the scope of close together, if there is barrier, it is ensured that safety of parking.This enforcement park ranging controlling apparatus adopt ultrasonic sensor send hyperacoustic mode, in short range, measure distance or the direction of barrier.When automobile driving speed is less than or equal to threshold speed, ultrasound wave launched by ultrasonic sensor, it is possible to ensures in the effective range that ultrasonic sensor normally detects, and can extend the service life of ultrasonic sensor.Preferably, the first processing module 51 is the single-chip microcomputer in display, and the second processing module 52 is the single-chip microcomputer in controller.Wired or wireless mode is adopted to transmit information between first processing module 51 and the second processing module 52.First processing module 51 can effectively obtain automobile driving speed, is not limited by vehicle, and the second processing module 52 controls to park effective unlatching of ranging process.
Preferably, when failing effectively to obtain satellite information, the second processing module 52 of information process unit 42 is additionally operable to send open command, ranging process of parking described in unlatching.As GPS module can send the first instruction to the first processing module, the first instruction is used for pointing out GPS module to fail effectively to obtain GPS information.Or first processing module do not receive GPS information in the given time, the numerical value that the scheduled time can obtain according to emulation experiment, or determine according to modes such as the empirical values generally adopted；Or first processing module cannot obtain ground speed information from reception information.First instruction is transmitted to the second processing module by the first processing module again, after the second processing module receives this instruction, opens ranging process of parking.Now, even if failing to obtain satellite information, this device also is able to open preposition range finding alarming device of parking and opens ranging process of parking, it is prevented that vehicle collision barrier, reduces potential safety hazard.
The present embodiment provides also a kind of preposition range finding alarming device of parking, and in conjunction with Fig. 6, this preposition range finding alarming device of parking includes ultrasonic sensor, controller and display.Ultrasonic sensor is arranged in vehicle front bumper, is used for launching and receiving ultrasound wave.In conjunction with Fig. 6, ultrasonic sensor is provided with four.Controller includes single-chip microcomputer, wave filter, amplifier, transmitting driver circuit and analog switch circuit, and single-chip microcomputer is used for controlling to launch driver circuit part and analog switch circuit pack, opens ultrasonic sensor and launches ultrasound wave.Controller adopts 12 volts of power supplys to be powered.The reflective wave transmission of reception to controller, is sequentially passed through the amplifier of controller, wave filter and single-chip microcomputer, echo is amplified, filters and computing, then adopt wired and wireless mode, output data to the single-chip microcomputer of display by ultrasonic sensor.Display includes single-chip microcomputer, charactron, buzzer and GPS module.Single-chip microcomputer in GPS module and display adopts serial ports to connect, and communication modes follows NMEA0183 agreement.GPS module is used for receiving satellite information, generates GPS information according to satellite information.Single-chip microcomputer in display, for reading the ground speed information in GPS information, contrasts, and sends the comparing result single-chip microcomputer to controller.Charactron is for showing minimum range and the orientation of barrier.When the distance of barrier is too small, buzzer is used for sending prompt tone, informs user.Owing to GPS module is used for receiving satellite information, it is in state that is unobstructed or that block less as far as possible.GPS module is integrated in display, and display is arranged on above the instrument desk of automobile, and installation site is generally unobstructed, is conducive to the reception of satellite-signal.
Preferably, in conjunction with Fig. 7, the concrete execution step of the preposition range finding alarming device of parking of the present embodiment is as follows:
Step S701: obtain satellite information, generates GPS information according to satellite information.GPS module receives satellite information, generates GPS information according to satellite information, and GPS information meets NMEA form.
Step S702: reading ground speed information from GPS information, the single-chip microcomputer in display adopts the mode that serial ports interrupts, reads ground speed information from GPS information, and single-chip microcomputer and GPS module follow NMEA0183 agreement.
Step S703: ground speed information and threshold speed are contrasted, obtains comparing result.Ground speed information and threshold speed are contrasted by the single-chip microcomputer of display, and comparing result is sent the single-chip microcomputer to controller.The single-chip microcomputer of display and the single-chip microcomputer of controller adopt wired or wireless mode to carry out communication.
If ground speed information is less than or equal to threshold speed, then the single-chip microcomputer of controller performs step S704: opens and launches driving circuit section and analog switching circuit part.Circuit pack connects, ultrasonic sensor and operable.
Step S705: ultrasound wave launched by ultrasonic sensor, and receives echo.Ultrasound wave transmits in atmosphere, when running into barrier, can reflect, and forms echo, and echo can be received by ultrasonic sensor.
Step S706: echo sequentially passes through amplification, filtering and computing, obtains the more specific location information of barrier.Echo is amplified and filters by the amplifier of controller and wave filter successively, removes the noise jamming in echo, is sent to the single-chip microcomputer in controller.The single-chip microcomputer in controller time of reception according to hyperacoustic x time and echo, through calculating, obtain the more specific location information of barrier, including the distance and bearing of barrier, and the more specific location information of the barrier obtained is sent the single-chip microcomputer to display.
Step S707: the distance of display target obstacle, exports prompt tone.The more specific location information of the barrier of reception is decoded by the single-chip microcomputer of display, sends the charactron to display or LCDs.Charactron or LCDs display minimum range and the orientation of barrier.When the distance of barrier is too small, or rule of thumb distance value, the single-chip microcomputer of display sends information to buzzer, controls buzzer output prompt tone.
If ground speed information is more than or equal to threshold speed, then the single-chip microcomputer of display can outpace the instruction of threshold value, the single-chip microcomputer of controller can perform step S708: closes and launches driving circuit section and analog switching circuit part, closes preposition ranging process of parking.
If fail effectively to obtain satellite information, as being in GPS module start-up course, or GPS module is arranged in indoor, basement or cavern, then GPS module can not normally receive satellite information.Now, GPS module can send first instruction single-chip microcomputer to display, and the first instruction is used for pointing out GPS module to fail effectively to obtain GPS information.Or the single-chip microcomputer of display does not receive GPS information in the given time, the numerical value that the scheduled time can obtain according to emulation experiment, or determine according to modes such as the empirical values generally adopted；Or the single-chip microcomputer of display cannot obtain ground speed information from reception information.First instruction is sent the single-chip microcomputer to controller by the single-chip microcomputer of display, and the single-chip microcomputer of controller performs step S709: opens and launches driving circuit section and analog switching circuit part.Display shows the measurement result of preposition ranging process of parking simultaneously, buzzer output prompt tone.
The preposition range finding alarming device of parking that the present embodiment provides, satellite information is obtained by GPS module, generate GPS information according to satellite information, from GPS information, obtain ground speed information, it is not necessary to from the speed control lines of automobile, obtain automobile driving speed, avoid a difficult problem for hunting speed control line, without there is the problem that OBD interface is tied up, it is to avoid reliability reduces, even without the vehicle of OBD interface, can also effectively obtain automobile driving speed, not by the impact of vehicle.Comparing result according to ground speed information and threshold speed, controls to be turned on and off ultrasonic sensor and launches hyperacoustic process, it is ensured that effective unlatching of ranging process of parking.When automobile is in and parks state, barrier near the ultrasound examination that ultrasonic sensor is launched, it is especially suitable for detecting and moves slowly at, whether there is barrier in the scope of close together, and the service life of ultrasonic sensor can be extended.
Although present invention has been a degree of description, it will be apparent that, without departing from the spirit and scope of the present invention when, can carry out the suitable change of each condition.Being appreciated that and the invention is not restricted to described embodiment, and be attributed to scope of the claims, it includes the equivalent replacement of described each factor.
Claims (10)
1. a range finding control method of parking, it is characterised in that described method includes:
Step S1: obtain satellite information, generates GPS information according to described satellite information；
Step S2: read ground speed information from described GPS information；
Step S3: described ground speed information and threshold speed are contrasted, obtains comparing result；
Step S4: according to described comparing result, controls to be turned on and off ranging process of parking.
2. method according to claim 1, it is characterised in that
In step s 4, if described ground speed information is more than described threshold speed, then ranging process of parking described in closing；
If described ground speed information is less than or equal to described threshold speed, then ranging process of parking described in opening.
3. method according to claim 1 and 2, it is characterised in that
Step S1:GPS module obtains satellite information, generates GPS information according to described satellite information；
Step S2: the first processing module reads ground speed information from described GPS information；
Step S3: described ground speed information and threshold speed are contrasted by described first processing module, obtain comparing result；
Step S4: described first processing module, according to described comparing result, sends and is turned on and off instruction, controls to be turned on and off ranging process of parking.
4. method according to claim 1 and 2, it is characterised in that
Step S1:GPS module obtains satellite information, generates GPS information according to described satellite information；
Step S2: the first processing module reads ground speed information from described GPS information；
Step S3: described ground speed information and threshold speed are contrasted by described first processing module, obtain comparing result, sends described comparing result to the second processing module；
Step S4: described second processing module, according to described comparing result, sends and is turned on and off instruction, controls to be turned on and off ranging process of parking.
5. the method according to claim 3 or 4, it is characterised in that
In step sl, if failing effectively to obtain satellite information, the method also includes: the first processing module or the second processing module open ranging process of parking.
6. method according to claim 5, it is characterised in that the method also includes:
Described GPS module sends the first instruction to described first processing module, and described first instruction is used for pointing out described GPS module to fail effectively to obtain satellite information.
7. a ranging controlling apparatus of parking, it is characterised in that described device includes:
GPS module and information process unit,
Described GPS module, is used for obtaining satellite information, generates GPS information according to described satellite information, and sends described GPS information extremely described information process unit；
Described information process unit, for reading ground speed information from described GPS information, contrasts described ground speed information and threshold speed, obtains comparing result, according to described comparing result, controls to be turned on and off ranging process of parking.
8. device according to claim 7, it is characterised in that
Described information process unit includes the first processing module and the second processing module,
Described ground speed information and threshold speed, for reading ground speed information from described GPS information, are contrasted, obtain comparing result by described first processing module, send described comparing result extremely described second processing module；
Described second processing module, for according to described comparing result, sending and be turned on and off instruction, controls to be turned on and off ranging process of parking.
9. device according to claim 8, it is characterised in that
Described first processing module is the single-chip microcomputer in display, and described second processing module is the single-chip microcomputer in controller.
10. the device according to claim 7～9 any one, it is characterised in that
When failing effectively to obtain satellite information, described information process unit is additionally operable to send open command, ranging process of parking described in unlatching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610076653.7A CN105717836A (en) | 2016-02-03 | 2016-02-03 | Parking distance measurement control method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610076653.7A CN105717836A (en) | 2016-02-03 | 2016-02-03 | Parking distance measurement control method and device |
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| CN201610076653.7A Pending CN105717836A (en) | 2016-02-03 | 2016-02-03 | Parking distance measurement control method and device |
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