CN202345672U - Curve over-speed warning auxiliary device - Google Patents

Abstract

The utility model discloses a curve over-speed warning auxiliary device, which comprises wireless data transmitting devices installed on two sides of a road, a wireless data receiving device installed in front of an automobile, a vehicle speed sensor and an acceleration sensor, wherein the vehicle speed sensor and the acceleration sensor are installed on the automobile. A single chip microcomputer is further installed in a driving cabin. The vehicle speed sensor, the acceleration sensor and the wireless data receiving device are respectively connected with the single chip microcomputer, and a warning device is further connected onto the single chip microcomputer. The curve over-speed warning auxiliary device can effectively solve the traffic jam problem at the curve position and improve traffic capacity of a road section.

Description

A corner overspeed alarm auxiliary device

technical field

The utility model belongs to an auxiliary device in the field of safe driving, in particular to an auxiliary device for overspeed alarm on a curve.

technical background

With the development of society, people's living standards are gradually improving, and the use of cars is also increasing.

People's requirements for safety and comfort are getting higher and higher. Speeding on curves has caused many traffic accidents and caused huge casualties.

At present, there are many institutions conducting research on the assisted driving of automobiles, and there are also many achievements. Some curves have a small radius of curvature, and traffic accidents are prone to occur when turning. Due to the influence of centrifugal force when the vehicle is driving on a curve, when the vehicle speed is too high, it is easy to cause the vehicle to slip and cause traffic accidents. In general, the driver will slow down on the curve, but if the driver is tired or the driver does not understand the sharpness of the curve, the driver will pass the curve at a relatively high speed. At this time, it is necessary to issue a warning to the driver Alarm to remind the driver to slow down. Therefore, the corner overspeed warning auxiliary device sends the radius of curvature of the road section to passing vehicles by setting wireless data transmission equipment at the corner where accidents occur frequently. After obtaining the curvature radius of the curve, the safe curve speed is calculated by combining various parameters of the own vehicle. The driver determines whether the speed of the own vehicle is higher than the safe curve speed according to whether the alarm device alarms, which can reduce the speed of the curve. The frequency of traffic accidents on the road will also be improved, and the discomfort caused by braking to the driver will be improved.

Contents of the invention

In order to avoid the defects or deficiencies in the prior art, the purpose of the utility model is to provide an auxiliary device for overspeed warning on curves.

In order to achieve the above tasks, the utility model takes the following technical solutions:

A corner speeding alarm auxiliary device, including and installed on both sides of the road wireless data sending equipment, wireless data receiving equipment installed in front of the car, and a vehicle speed sensor and acceleration sensor installed on the car, is characterized in that there are also A single-chip microcomputer is housed, and a vehicle speed sensor, an acceleration sensor, and a wireless data receiving device are respectively connected with the single-chip microcomputer, and the single-chip microcomputer is also connected with an alarm device.

Other features of the utility model are:

The wireless data receiving device and the wireless data sending device adopt DTD433 wireless data transmission device.

The auxiliary device for overspeeding on curves of the utility model uses the wireless data receiving equipment installed in front of the car to receive the road curvature radius R and road surface parameters sent by the wireless data sending equipment installed on both sides of the road, and the real-time data of the acceleration sensor and the speed sensor Collect the acceleration of the vehicle and the running speed of the vehicle, calculate the safe curve speed V _safe through the single-chip computer, and then compare it with the current speed V of the own vehicle. If the current speed V is greater than the safe turning speed V _safe , the alarm device will An alert will sound to remind the driver to slow down. If the current vehicle speed V is less than the safe turning speed V _safe , no alarm will be issued, and the driver can pass directly without slowing down. It can effectively solve the traffic congestion at the curve. The traffic capacity of this section can be improved.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 is a schematic diagram of the steady-state steering movement of a car.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further explained.

Detailed ways

Referring to Fig. 1, the present embodiment provides a safe steering assist device, including and installed on both sides of the road wireless data transmission equipment, wireless data receiving equipment installed in front of the car, and a vehicle speed sensor and acceleration sensor installed on the car, and a single-chip microcomputer and an alarm device. The wireless data receiving equipment is located at the vehicle logo in front of the car, and the single-chip microcomputer and the alarm device are installed in the cockpit.

The vehicle speed sensor, the acceleration sensor, and the wireless data receiving equipment are respectively connected with the single-chip microcomputer, and the single-chip microcomputer is also connected with an alarm device.

The wireless data receiving device and the wireless data sending device adopt the wireless data transmission device DTD433. The wireless data transmission device DTD433 can provide data transmission with high stability, high reliability and low cost. It provides a transparent RS232/RS485 interface, which has the characteristics of convenient installation and maintenance, strong diffraction ability, flexible networking structure, and wide-area coverage. It is suitable for applications where there are many scattered points and complex geographical environments. Install this kind of wireless data transmission equipment at the bends where accidents occur frequently, and transmit data point-to-point with passing vehicles. After the radius of curvature at the curve, calculate the safe curve speed according to the speed of the vehicle, and determine whether the alarm device will alarm by judging the speed of the vehicle and the safe turning speed.

Referring to Figure 2, when the driver drives to a certain distance from the curve, at this time, the wireless data receiving device (wireless data transmission device) on the car receives the wireless data transmission device (wireless data transmission device) at the curve. The signal sent out obtains the curvature radius R of the current curve and the parameters of the road surface, and calculates the maximum curve speed at the curve according to various parameters of the own vehicle (divided by the safety factor to obtain the corresponding safe curve speed ) V _max ,

The acceleration sensor collects the acceleration of the vehicle as a ₀ , which is calculated by the following calculation formula:

${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; u</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}\mathrm{<span\; class="notranslate">\; mg</span>}<span\; class="notranslate">\; =</span>\sqrt{{{\mathrm{<span\; class="notranslate">\; f</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}_{\mathrm{<span\; class="notranslate">\; x</span>}}<span\; class="notranslate">\; +</span>{{\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; the\; y</span>}}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

F _x =ma ₀ (2)

${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; the\; y</span>}}<span\; class="notranslate">\; =</span>\frac{{{\mathrm{<span\; class="notranslate">\; mV</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; R</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

Among them, u _max is the maximum adhesion coefficient of the road surface (obtained by wireless transceiver equipment), m is the mass of the vehicle, F _x , F _y are the longitudinal force and lateral force on the vehicle respectively, V is the direction of motion of the vehicle, and O is The center of curvature of the curve, R is the radius of curvature of the curve.

The formula for calculating the maximum vehicle speed can be obtained from the above three equations:

${\mathrm{<span\; class="notranslate">\; V</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; =</span>\sqrt{\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{{\mathrm{<span\; class="notranslate">\; u</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; g</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; )</span>$

V _safe = V _max · δ (5)

Where δ is a number less than 1, and V _safe is a safe curve driving speed.

The MCU compares the current vehicle speed V with the safe curve speed V _safe , if the current vehicle speed V is greater than the safe curve speed V _safe , the MCU controls the alarm device to issue an alarm to remind the driver to pass the curve at the current speed V If the current vehicle speed V is lower than the safe curve speed V _safe , the alarm device will not work, and there will be no danger when passing the curve directly at the current speed V. At this time, the driver knows that there will be no danger in driving through the curve at the current vehicle speed V. Therefore, this curve overspeed warning device can effectively improve the traffic capacity of vehicles at the curve, and can reduce traffic accidents caused by high vehicle speeds at the curve. And when driving at night, this curve speeding alarm device can obviously improve the traffic conditions of accident-prone road sections.

Claims (2)

1. bend overspeed alarming auxiliary device; Comprise being installed on road both sides wireless data transmitting apparatus, be installed in the wireless data reception facilities of vehicle front, and car speed sensor of installing on the automobile and acceleration pick-up; It is characterized in that; A micro controller system also is housed in the driving compartment, and described car speed sensor, acceleration pick-up, wireless data reception facilities link to each other with micro controller system respectively, also are connected with warning device on the micro controller system.

2. bend overspeed alarming auxiliary device as claimed in claim 1 is characterized in that, described wireless data reception facilities and wireless data transmitting apparatus adopt the DTD433 wireless data transmission equipment.

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