CN103956071A

CN103956071A - Method for finding vehicle in parking place

Info

Publication number: CN103956071A
Application number: CN201410218306.4A
Authority: CN
Inventors: 胡莹莹; 徐敬
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-05-20
Filing date: 2014-05-22
Publication date: 2014-07-30
Anticipated expiration: 2034-05-22
Also published as: CN103956071B

Abstract

The invention relates to a method for finding a vehicle in a parking place. According to the method, outside information is not needed, networks do not need to be built or engineering construction is not needed, and the method can be used on the ground or underground. The method is based on a portable electronic device provided with a three-axis accelerometer, a three-axis gyroscope and a micro processor. People only need to press a start key of a device during parking. The micro processor repeatedly and continuously collects data of the three-axis accelerometer and the three-axis gyroscope at certain frequency after the start key is pressed, a distance value between an owner and the vehicle in a ground coordinate system is calculated and displayed on a display screen, and increasing or reducing of the distance is prompted through sound, light and vibration. The owner walks to the direction where the distance is reduced according to distance prompts until the distance is approximately zero, and accordingly the vehicle is found. The method is not limited in finding the vehicle in the parking place, and is suitable for all occasions when people need to return to preset starting points.

Description

The method of car is looked in a kind of parking lot

Technical field

The invention belongs to a kind of method that finds car in parking lot, particularly a kind of by finding stopped sub method under the portable electron device guide carrying.

Background technology

After Parking, later going for the position of stopping is a very difficult thing sometimes again, especially at some stranger or more complicated parking environments.In order to address this problem, there are at present following schemes.

A kind of scheme is to locate by GPS, demarcates the position of stopping on electronic chart, but can not cause losing efficacy owing to receiving satellite-signal for underground parking.

Another scheme is that the base station by mobile communication positions, and this need to install a mobile communication module on car, and takies the resource of a telephone number, and obviously cost of use is higher.

Also having a kind of scheme is to utilize indoor positioning technology, takes wireless signal to layout and network, and definite car positional information is sent on car owner's mobile phone, and the prompting that car owner provides by this network system just can be found the position of parking.The shortcoming of this scheme is to need to set up the wireless network for locating.

Some parking lot is at each parking stall sensor installation, has car and do not have car can show in the center management system in parking lot on parking stall, and further, this system can accomplish parking spot information to be dealt on car owner's mobile phone and later to look for car to facilitate.Obviously this scheme is also more complicated.

All methods all will relate to that network is layouted and communication above, and what determine is the absolute position of car on map.

In fact, find car only need to allow car owner know car and the relative distance between him be diminish gradually just passable, when this relative distance also just means and found car close to zero.This can realize by the principle of inertial navigation.Inertial navigation is according to Newton second law in kinematics, utilize inertance element accelerometer measures acceleration, and with gyroscope etc., the attitude of moving object is proofreaied and correct, by the linear acceleration of three dimensions is carried out respectively to the displacement that twice integral operation obtains three orthogonal directionss, by these three displacements, also just can calculate distance.The advantage of inertial navigation unit is without any need for external information, does not also need to build any network or carries out engineering construction, and above and below ground can be used.Certainly, inertial navigation also has shortcoming, because displacement is to obtain by the integration to the time, because element measuring accuracy and the error of calculation can cause the longer error calculated of time remaining larger.

At present, the electronic installation of carrying has all adopted the inertance elements such as the micro electronmechanical accelerometer of MEMS, gyroscope, magnetometer to be used as motion sensor widely as smart mobile phone, intelligent watch, electronics bracelet etc., the iPhone mobile phone that resembles Apple has just adopted three axis accelerometer and the three-axis gyroscope of 16 two's complement outputs.The performance of microprocessor is also more and more higher, and the calculating a large amount of for real-time processing are also nothing difficult.And for looking for this application of car, computational accuracy does not need very high.

Summary of the invention

The object of the invention is to wish the car that helps people to find to park by a shirtsleeve operation mode.

To achieve these goals, the present invention is based on there is three axis accelerometer, the portable electron device of three-axis gyroscope and microprocessor, this device can be a smart mobile phone, or an intelligent watch, also can be an electronics bracelet, facilitate in a word car owner to carry.When car owner has stopped after car in parking lot, he can leave after only need clicking the startup button of this device, the microprocessor of this device repeats constantly to gather the data of three axis accelerometer and three-axis gyroscope after this startup button is pressed by certain frequency, and calculate the distance value between car owner and car in earth axes, be presented on display screen, and be become large or diminish by sound, light, this distance of vibration prompt.When car owner finishes thing, return to look for car, he walks towards the direction that reduces gradually according to distance prompt, until just found while approaching zero.In fact, when this distance hour, thereby car owner can find car by ekphorize completely according to site environment.Find after car, car owner presses stopping key of this device.

The present invention is not limited to parking lot and looks for car, and any occasion that need to get back to predefined start position is all suitable for.

Such as, tourist group is when certain sight spot of visit, what time everybody is in this homeposition set for guide and everybody agreement, and the carry-on device of each self-starting of each visitor oneself so, even also can get back to well starting point according to distance prompt at strange environment.

For another example, the operational design of this electronic installation must be applicable to blind personage and use, under the sound that they can diminish in distance so, vibration prompt, get back to predefined departure place.

Accompanying drawing explanation

Fig. 1 be the present invention based on portable electronic device structure schematic diagram.

Fig. 2 be the present invention based on smart mobile phone schematic appearance.

Fig. 3 be the present invention based on electronics bracelet schematic appearance.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

The present invention based on portable electronic device structure referring to Fig. 1, wherein three axis accelerometer is connected with microprocessor by communication interface with three-axis gyroscope, three axis accelerometer is pressed certain frequency and is regularly produced the linear acceleration data of three dimensions, three-axis gyroscope is also pressed certain frequency and is regularly produced the angular velocity data of three dimensions, microprocessor is regularly reached above data and is calculated by communication interface, angular velocity data is by obtaining auto levelizer at the inclination angle of three dimensions after integration, in the future the data of self-acceleration meter are transformed into the linear acceleration of three dimensions in earth axes accordingly, through integration, obtain speed, integration obtains the displacement of three dimensions again, distance is the root-mean-square valve of displacement, or adopt simple algorithm, the absolute value of the displacement of three dimensions is added and obtains distance value, also be manhatton distance.

Startup button in Fig. 1, stop key with output enable button can be that physical button is connected with microprocessor, can be also the virtual key of touch-screen.After startup button is pressed, microprocessor is by the zero clearing of associated storage data and start processing from the data of three axis accelerometer and three-axis gyroscope, and the distance value calculating is regularly delivered to display screen demonstration, and divide and be clipped to hummer, luminotron, vibrating motor according to the sound, light, the vibration that are easy to two kinds of different modes of identification apart from the large output that still diminishes of change, output enable button is used for controlling unlatching and exports or close output.While being pressed when stopping key, microprocessor stops the execution of above-mentioned all programs.

The present invention based on smart mobile phone outward appearance referring to Fig. 2, smart mobile phone has possessed the hardware cells such as three axis accelerometer, three-axis gyroscope and microprocessor, only needs to install application software.There are three virtual keys the display screen below of mobile phone, is respectively startup button, stops key and output enable button, by touch-screen, is input to microprocessor.The top of display screen is that distance shows, and shows it is to approach car with the sensing of arrow, and distance value is more and more less, otherwise when distance becomes large, the direction of arrow is reverse.

The present invention based on electronics bracelet outward appearance referring to Fig. 3, electronics bracelet is for power saving and reduce costs and there is no display screen, sound, light, vibration prompt distance by two kinds of different modes are become near or become far away.On electronics bracelet, have startup, stop and three buttons of output enable, also have luminotron and hummer, there is vibrating motor inside, if need further power saving can cancel vibrating motor.

The content that this instructions is not described in detail belongs to the known prior art of professional and technical personnel in the field.

Claims

1. the method that car is looked in parking lot, based on thering is three axis accelerometer, the portable electron device of three-axis gyroscope and microprocessor, it is characterized in that: a button that clicks this device at origin, the microprocessor of this device repeats constantly to gather the data of three axis accelerometer and three-axis gyroscope after this button is pressed by certain frequency, and calculate the distance value between this device and origin in earth axes, be presented on display screen, and pass through sound, light, this distance of vibration prompt is become large or diminish, the carrier of this device walks towards the direction reducing gradually according to distance prompt, until just got back to origin while approaching zero.