Bicycle tail lamp combining IMU and millimeter wave radar

Abstract

The utility model discloses a bicycle tail lamp combining an IMU (Inertial Measurement Unit) and a millimeter wave radar, which comprises a tail lamp shell (1) arranged at the rear part of a bicycle; the millimeter-wave radar module (6) is mounted on a mainboard (4) and used for transmitting millimeter-wave radar signals and receiving reflected signals, and the radar module comprises a transmitting antenna and two receiving antennas and is used for detecting the relative position, distance and speed of a rear obstacle; and the IMU module is used for detecting the acceleration change of the bicycle, in particular the acceleration change of the bicycle during braking. The distance, the speed and the direction of a rear vehicle can be detected in real time through the millimeter wave radar module, and when it is detected that the rear vehicle is too close to the vehicle or too high in speed, the system can automatically activate the tail lamp to enable the tail lamp to flicker rapidly, the rear vehicle is warned in time, and collision accidents are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle tail light, concretely relates to a bicycle tail light combined with IMU and millimeter wave radar. BACKGROUND

[0002] With the rapid development of urban traffic, bicycles, as a kind of green and environmentally friendly transportation tool, are widely used in daily travel and fitness activities. Bicycle tail light is an indispensable safety device in the process of riding, its main function is to warn the rear vehicle or pedestrian, to prevent traffic accidents due to insufficient visibility. Most of the existing bicycle tail lights are controlled by simple switch, only can work in fixed mode, can not provide real-time safety feedback according to the dynamic change of riding environment. For example, when the rear vehicle approaches, the traditional tail light can not detect and warn intelligently, resulting in limited safety warning effect. In addition, when the bicycle brakes suddenly or the speed changes suddenly, the existing tail light also lacks the ability to perceive and respond to these emergency situations.

[0003] Millimeter wave radar, as a kind of sensor that can accurately detect distance and speed, has been widely used in automobile anti-collision system. It can obtain the distance, speed and direction of the obstacle in real time by emitting high frequency electromagnetic wave and receiving the signal reflected by the obstacle. However, the application of millimeter wave radar in bicycle tail light system is less seen. Similarly, IMU (inertial measurement unit) sensor has the function of detecting acceleration and angular velocity, which can effectively monitor the motion state of the vehicle, such as acceleration, deceleration and sudden braking. Although IMU technology has been widely used in intelligent devices and automatic driving field, there is no mature product scheme to combine it with millimeter wave radar to improve the safety warning ability of bicycle tail light.

[0004] The limitations of the prior art are: 1) the tail light lacks intelligent perception ability and cannot make corresponding warning according to the dynamic distance and speed change of the rear vehicle; 2) the tail light cannot respond to sudden braking or severe acceleration change during riding, and provide sufficient safety prompt in critical situation. Therefore, it has become an important issue in the current technical field to develop a bicycle tail light device that can intelligently perceive the rear obstacle and emergency braking situation to improve the safety of riding. UTILITY MODEL CONTENT

[0005] In order to solve the above problems, the utility model provides a bicycle tail light combined with IMU and millimeter wave radar, which can adjust the flashing mode of the tail light in real time according to the acceleration change during riding and the distance, speed and other information of the rear vehicle, and significantly improve the safety of riding.

[0006] The utility model is realized through the following technical schemes: a bicycle tail light combined with IMU and millimeter wave radar, comprising:

[0007] A tail lamp housing is mounted on the rear of the bicycle;

[0008] A millimeter wave radar module is mounted on a main board for transmitting millimeter wave radar signals and receiving reflected signals, the radar module comprising a transmitting antenna and two receiving antennas for detecting the relative position, distance and speed of a rear obstacle;

[0009] An IMU module is used to detect the acceleration changes of the bicycle, especially the acceleration changes when the bicycle brakes;

[0010] An MCU control unit is mounted on the main board and connected with the millimeter wave radar module and the IMU module respectively, for receiving the data of the millimeter wave radar module and the IMU module, and controlling the flashing frequency of the tail lamp according to the distance, speed information and acceleration changes of the obstacle;

[0011] An LED light source array is mounted on the main board and connected with the MCU control unit, for controlling the LED light source to flash and warn the rear vehicle when detecting that the rear obstacle is too close or too fast.

[0012] As a preferred technical solution, the millimeter wave frequency transmitted by the millimeter wave radar module is 72GHz, and the relative position and speed of the obstacle are calculated according to the phase difference of the return signal.

[0013] As a preferred technical solution, the IMU module is a multi-axis acceleration sensor, which can detect the acceleration changes of the bicycle in multiple axial directions, and trigger the tail lamp to flash when detecting a sharp acceleration change in the forward direction.

[0014] As a preferred technical solution, a tail lamp face shell is mounted on the tail lamp housing, and the tail lamp face shell is provided with a ring of lamp shade panels corresponding to the positions of the LED light source array.

[0015] As a preferred technical solution, a power module is further included for power supply.

[0016] The beneficial effects of the present application are: the present application combines IMU (inertial measurement unit) and millimeter wave radar technology, significantly improving the intelligence and safety of the bicycle tail lamp. Through the millimeter wave radar module, the distance, speed and direction of the rear vehicle can be detected in real time, and when the rear vehicle is detected to be too close or too fast, the system can automatically activate the tail lamp to make it flash quickly, timely warning the rear vehicle and avoiding collision accidents.

[0017] At the same time, the IMU module can monitor the acceleration change of the bicycle, especially in the case of emergency braking or speed reduction, the tail lamp can respond immediately, light up and flash quickly, remind the rear vehicle or pedestrian, improve the riding safety.

[0018] The utility model discloses a distance perception of combining millimeter wave radar and the motion state monitoring of IMU, the utility model greatly enhances the dynamic safety early warning function in the riding process, provides more comprehensive safety guarantee for the rider. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other drawings according to these drawings.

[0020] Figure 1 It is the whole structure schematic diagram of the utility model;

[0021] Figure 2 It is the internal structure schematic diagram of the utility model;

[0022] Figure 3 It is the system block diagram of the utility model;

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, tail lamp shell;2, tail lamp face shell;3, lampshade panel;4, mainboard;5, LED light source array;6, millimeter wave radar module. DETAILED DESCRIPTION

[0025] All features disclosed in this specification, or all steps of any methods or processes disclosed, can be combined in any combination, except combinations where at least some of the features and / or steps are mutually exclusive.

[0026] Any feature disclosed in this specification, unless stated otherwise, can be replaced by alternative features or equivalents having the same or a similar effect. That is, unless stated otherwise, each feature is one example only of a number of alternative or comparable features.

[0027] As Figures 1-3 The utility model discloses a kind of bicycle tail lamps of combining IMU and millimeter wave radar, including tail lamp shell 1, the tail lamp shell 1 is installed in bicycle rear part;

[0028] Also includes millimeter wave radar module 6, installed on a mainboard 4, for transmitting millimeter wave radar signals and receiving reflected signals, the radar module contains a transmitting antenna and two receiving antennas for detecting the relative position, distance and speed of the rear obstacle;

[0029] Also includes IMU module for detecting acceleration changes of the bicycle, especially detecting acceleration changes of the bicycle when braking;

[0030] Also includes MCU control unit, installed on the mainboard 4, which is connected with the millimeter wave radar module 6 and the IMU module respectively, for receiving data of the millimeter wave radar module 6 and the IMU module, and controlling the flashing frequency of the tail light according to the distance, speed information and acceleration change of the obstacle;

[0031] And including LED light source array 5, installed on the mainboard 4, and connected with the MCU control unit, when detecting that the rear obstacle is too close or too fast, the LED light source is controlled to flash to warn the rear vehicle.

[0032] In the embodiment, the millimeter wave frequency emitted by the millimeter wave radar module 6 is 72GHz, and the relative position and speed of the obstacle are calculated according to the phase difference of the return signal.

[0033] The IMU module is a multi-axis acceleration sensor, which can detect acceleration changes of the bicycle in multiple axial directions, and trigger the tail light to flash when detecting sharp acceleration changes in the forward direction.

[0034] As shown in Figure 1 And Figure 2 The tail lamp shell 1 is provided with a tail lamp surface shell 2, and the tail lamp surface shell 2 is provided with a ring of lamp shade panels 3 corresponding to the positions of the LED light source array 5.

[0035] The power supply module can be a rechargeable battery, which can be charged regularly and continue to be used.

[0036] The power supply module can be a rechargeable battery, which can be charged regularly and continue to be used.

[0037] The power supply module can be a rechargeable battery, which can be charged regularly and continue to be used.

[0038] At the same time, the millimeter wave radar module 6 continuously emits 72GHz millimeter wave signals to monitor the distance, speed and relative position of the rear vehicle;

[0039] When the millimeter wave radar detects that the rear vehicle is too close or too fast, the MCU will judge the danger level according to the received radar data, and automatically trigger the tail light to flash quickly to warn the rear vehicle;

[0040] When the rider suddenly brakes, the IMU module will also immediately instruct the tail light to light up and high-frequency flash to play an emergency warning role through the detected acceleration change;

[0041] In addition, the system also has intelligent anti-interference function, when the rider encounters bumps or uneven road, the IMU module will filter out unnecessary acceleration change signals through algorithm, to ensure that the tail light is only triggered in actual emergency;

[0042] Through the cooperation of IMU and millimeter wave radar, the utility model can provide timely and effective safety warning in various riding states.

[0043] The utility model has the advantages that: the utility model combines IMU (inertial measurement unit) and millimeter wave radar technology, which significantly improves the intelligence and safety of the bicycle tail light. Through the millimeter wave radar module 6, the distance, speed and position of the rear vehicle can be detected in real time, and when the rear vehicle is detected to be too close or too fast, the system can automatically activate the tail light to make it flash quickly, timely warning the rear vehicle and avoiding collision accidents.

[0044] At the same time, the IMU module can monitor the acceleration change of the bicycle, especially in the case of sudden braking or speed reduction, the tail light will immediately respond, light up and flash quickly, reminding the rear vehicle or pedestrian and improving the riding safety.

[0045] The utility model greatly enhances the dynamic safety warning function in the riding process by combining the distance perception of millimeter wave radar and the motion state monitoring of IMU, and provides more comprehensive safety protection for the rider.

[0046] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any change or replacement without creative labor should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited to the protection scope defined in the claims.

Claims

1. A bicycle tail light incorporating an IMU and a millimeter wave radar, characterized in that, Comprising of: A tail lamp housing (1) mounted at the rear of the bicycle; A millimeter wave radar module (6) mounted on a main board (4) for emitting millimeter wave radar signals and receiving reflected signals, the radar module contains a transmitting antenna and two receiving antennas for detecting the relative position, distance and speed of the rear obstacle; An IMU module for detecting the acceleration changes of the bicycle, detecting the acceleration changes of the bicycle when braking; An MCU control unit mounted on the main board (4) connected with the millimeter wave radar module (6) and the IMU module respectively, for receiving the data of the millimeter wave radar module (6) and the IMU module, and controlling the flashing frequency of the tail lamp according to the distance, speed information and acceleration changes of the obstacle; An array of LED light sources (5) mounted on the main board (4) and connected with the MCU control unit, for controlling the LED light source to flash and warn the rear vehicle when detecting that the rear obstacle is too close or too fast.

2. The bicycle tail light incorporating IMU and mmWave radar according to claim 1, wherein: The millimeter wave frequency emitted by the millimeter wave radar module (6) is 72GHz, and the relative position and speed of the obstacle are calculated according to the phase difference of the return signal.

3. The bicycle tail light incorporating IMU and mmWave radar of claim 1, wherein: The IMU module is a multi-axis acceleration sensor that can detect the acceleration changes of the bicycle in multiple axial directions, and trigger the tail lamp to flash when detecting a sharp acceleration change in the forward direction.

4. The bicycle tail light incorporating IMU and mmWave radar of claim 1, wherein: The tail lamp housing (1) is mounted with a tail lamp surface shell (2), and the tail lamp surface shell (2) is provided with a ring of lamp shade panels (3) corresponding to the position of the array of LED light sources (5).

5. The bicycle tail light incorporating IMU and mmWave radar according to claim 1, wherein: It also includes a power module for power supply.

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