Unlock instant, AI-driven research and patent intelligence for your innovation.

A vehicle type and speed detection device based on bias magnetic field

A technology of vehicle detection and bias magnetic field, which is applied in the direction of traffic flow detection, traffic control system of road vehicles, instruments, etc., can solve problems such as unsatisfactory technical realization, inability to detect speed, inability to perform vehicle type, etc.

Inactive Publication Date: 2016-02-10
XUZHOU UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of working method has a relatively simple structure and is easy to implement. However, in addition to the problems listed above, this method does not fully explore the physical characteristics of the vehicle's magnetic signal, and the inability to obtain consistent detection results is the fundamental nature of this type of geomagnetic sensor. question
In addition, this vehicle detection method can only detect the presence of the vehicle, but cannot detect the type of vehicle, nor can it detect the speed
Two sensors must be used for vehicle speed detection, and this speed measurement scheme is not satisfactory in both technical realization and practical application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A vehicle type and speed detection device based on bias magnetic field
  • A vehicle type and speed detection device based on bias magnetic field
  • A vehicle type and speed detection device based on bias magnetic field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] See figure 1 , image 3 , a vehicle detection device, comprising:

[0067] The magnetic bias generating device is used to generate a bias magnetic field 5 with stable spatial distribution, and the loop formed by the magnetic field lines of the bias magnetic field 5 is in the same direction as the direction of the lane, and covers the lane;

[0068] The magnetic sensing component 4 is placed in the bias magnetic field 5, and receives the magnetic disturbance signal generated by the target vehicle entering the bias magnetic field 5;

[0069] The storage unit stores the vehicle type feature library, and can also simultaneously store the vehicle types that are allowed to enter the lane;

[0070] The vehicle type feature library is a priori knowledge, which needs to be obtained before using the device; wherein, the method for obtaining the vehicle type feature library is: when each type of vehicle passes through the bias magnetic field 5, the The magnetic sensing componen...

Embodiment 2

[0097] See figure 1 , image 3 , Figure 4 , Figure 5 , Figure 6 , a working method of a vehicle detection device based on embodiment 1, comprising:

[0098] ①. A magnetic bias generating device is used to generate a bias magnetic field 5 with stable spatial distribution, and the loop formed by the magnetic force lines of the bias magnetic field 5 is in the same direction as the direction of the lane, and covers the space above the lane;

[0099] ②. A magnetic sensing component 4 placed in the bias magnetic field 5 receives the magnetic disturbance signal generated by the target vehicle entering the bias magnetic field 5;

[0100] ③. A storage unit that stores the vehicle type feature library and the vehicle types that are allowed to enter the lane,

[0101] The vehicle type feature library is pre-stored in the memory, which is a priori data obtained from a large number of experimental results after statistical processing; wherein, the method for obtaining the vehicle t...

Embodiment 3

[0126] See Figure 6 , Figure 7 1. A vehicle pressing track solid line capture device on the basis of embodiments 1 and 2, comprising a vehicle detection device, the vehicle detection device is arranged on the center line of the solid line driveway, and is adapted to control the capture image connected to the control unit of the device.

[0127] Wherein, the processor module presets the lane width of the solid line, obtains the offset distance after obtaining the target vehicle width corresponding to the vehicle type, and determines whether the sum of the offset distance and the target vehicle width is greater than the solid line If the width of the lane is greater than that, it is determined that the body of the target vehicle presses the solid line of the lane, that is, the control unit controls the capture and imaging device to capture.

[0128] The processor module may be connected with the control unit to control the capture imaging device to perform capture.

[0129]...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a vehicle type and speed detection device based on a bias magnetic field and a working method. The vehicle type and speed detection device comprises a magnetic bias generation device, a magnetic sensing assembly, a storage unit, and a processor module. The magnetic bias generation device is used for generating a bias magnetic field with stable spatial distribution, the direction of a loop formed by a magnetic line of force of the bias magnetic field is consistent with the direction of a lane, and the bias magnetic field covers the lane. The magnetic sensing assembly is placed in the bias magnetic field, and receives magnetic disturbance signals generated when a target vehicle enters the bias magnetic field. The storage unit stores a vehicle type feature library. The processor module is connected with the storage unit, and is suitable for processing the magnetic disturbance signals received by the magnetic sensing assembly, namely, the processor module converts the magnetic disturbance signals into a pulse signal corresponding to the target vehicle, and the pulse amplitude of the pulse signal is the average of the amplitudes of the magnetic disturbance signals. The processor module can obtain the type of the target vehicle by comparing the pulse signal with the pulse amplitudes in the vehicle type feature library.

Description

technical field [0001] The invention relates to the field of vehicle type and speed detection, in particular to a magnetic bias-based vehicle type and speed detection device and working method. Background technique [0002] Compared with the ground induction coil, the geomagnetic sensor, as a vehicle detection sensor with obvious advantages, has received extensive attention and hope in the field of traffic monitoring. Especially in the era of the Internet of Things, geomagnetic sensors are widely used in traffic monitoring networks and have broad prospects. Although vehicle sensors based on geomagnetism have appeared for a long time since the appearance of miniature fluxgate sensors and magnetoresistive sensors AMR at the end of the last century, they have not been widely used so far. One of the main reasons is that geomagnetism is a constant direction The magnetic field is from south to north on the surface of the earth, so the magnetic sensor has the maximum detection val...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/01G08G1/017G08G1/054G08G1/042
Inventor 王建颖周宏生杨兴运赵月润张丽丽
Owner XUZHOU UNIV OF TECH