WO2018035847A1 - 一种自动避障的送餐机器人及避障方法 - Google Patents

一种自动避障的送餐机器人及避障方法 Download PDF

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Publication number
WO2018035847A1
WO2018035847A1 PCT/CN2016/096894 CN2016096894W WO2018035847A1 WO 2018035847 A1 WO2018035847 A1 WO 2018035847A1 CN 2016096894 W CN2016096894 W CN 2016096894W WO 2018035847 A1 WO2018035847 A1 WO 2018035847A1
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Prior art keywords
robot
obstacle avoidance
distance
infrared sensor
sensor
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PCT/CN2016/096894
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English (en)
French (fr)
Inventor
范春燕
覃国秘
钟志威
刘波
苏明珠
莫伟雄
李耀军
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深圳市赛亿科技开发有限公司
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Application filed by 深圳市赛亿科技开发有限公司 filed Critical 深圳市赛亿科技开发有限公司
Priority to PCT/CN2016/096894 priority Critical patent/WO2018035847A1/zh
Priority to CN201680060386.2A priority patent/CN108136589A/zh
Publication of WO2018035847A1 publication Critical patent/WO2018035847A1/zh

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25JMANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J11/00Manipulators not otherwise provided for

Definitions

  • the invention relates to the technical field of intelligent robots, in particular to a feeding robot and an obstacle avoiding method for automatically avoiding obstacles.
  • the feeding robots in the prior art all have a grayscale recognition sensor installed on the bottom of the robot, and then deliver the meal according to the preset track, but if someone passes on the preset track, or something stays in the pre-presence On the track, the food delivery robot cannot continue to feed the meal because it cannot recognize the preset track, and even more may hit something on the track or the person, which not only makes the meal delivery efficiency lower, but also may It is a danger of scalding people due to the smashing of people because they hit people. Since the prior art food delivery robot cannot realize the real-time obstacle avoidance function, a food delivery robot that can automatically avoid obstacles is needed.
  • An automatic obstacle avoidance feeding robot of the present invention includes: a robot head, a robot trunk, and two arms disposed on two sides of the robot trunk, wherein the arm is fixed with a tray for placing dishes;
  • the robot head or the torso of the robot is provided with a plurality of distance detectors for detecting obstacles. When the obstacle enters the detection range of the distance detector, an alarm is issued and the robot's torso is stopped to advance or turn.
  • the distance detector comprises an infrared sensor and an ultrasonic sensor.
  • the infrared sensor and the ultrasonic sensor are equally spaced apart from each other at the front and rear of the robot head or the robot trunk.
  • the number of the ultrasonic sensor and the infrared sensor is two.
  • the ultrasonic sensor and the infrared sensor are distributed on the left side and the right side of the robot head or the robot trunk, respectively detecting the front and rear sides, and the distance between the right left and right obstacles.
  • the total number of the ultrasonic sensor and the infrared sensor distributed on the left and right sides of the robot head are all three, and one of the infrared sensors is located between the two ultrasonic sensors.
  • the method further includes a Bluetooth transmitting device disposed on the dining table of the target meal, and a receiving device matched with the Bluetooth transmitting device disposed on the automatic obstacle avoidance feeding robot.
  • the front wheel disposed at the bottom of the torso of the robot is controlled by a servo motor, and the servo motor controls the body torso steering by using a PID mode.
  • An obstacle avoidance method for an automatic obstacle avoidance feeding robot comprising the following steps:
  • an infrared sensor and an ultrasonic sensor are installed on the robot head; wherein an infrared sensor and an ultrasonic sensor are respectively disposed at the front and rear of the robot head or the robot trunk, and the infrared sensor and the ultrasonic sensor are cross-distributed; the robot head or the robot Two ultrasonic sensors and one infrared sensor are respectively disposed on the left and right sides of the trunk, and the infrared sensor is located between the two ultrasonic sensors;
  • the distance between the ultrasonic sensor in front and the ultrasonic sensor in front of the adjacent side respectively detects the distance of the obstacle, which are respectively recorded as: L1 meter, L2 meter; if the average value of L1 and L2 is greater than 0.8 and less than 1.5, the front is indicated Have obstacles;
  • the distance between the front infrared sensor and the adjacent side infrared sensor is detected as: L4, L5; if the average value of L4 and L5 is greater than 0 and less than 0.4, it indicates that there is an obstacle in front;
  • the ultrasonic sensors of the front, rear, and right sides of the left side respectively detect the distance of the obstacle; when any of the detection distances is between 0.8 meters and 1.5 meters, the robot's torso is controlled to decelerate.
  • the step of automatically turning the robot trunk when the steering is turned, if the distance detected by the infrared sensors on the left and right sides is less than 0.4 m, the steering is stopped.
  • the automatic obstacle avoidance feeding robot in the present invention effectively detects the collision of the feeding robot by setting a plurality of infrared sensors and ultrasonic sensors on the robot and detecting the surrounding obstacles through the sensor.
  • the accident provided distance data for the feeding robot to avoid obstacles and commutation, making the delivery robot safer, more reliable, and faster to deliver.
  • FIG. 1 is a schematic view showing the distribution structure of a robot head detector of a food delivery robot for automatically avoiding obstacles according to the present invention.
  • FIG. 2 is a flow chart of an obstacle avoidance method of the automatic obstacle avoidance feeding robot of the present invention.
  • the automatic obstacle avoidance feeding robot includes: a robot head 1 , a robot torso and two arms disposed on two sides of the robot trunk, and the arms are fixed on each arm. a tray for placing a dish; wherein the robot head 1 is provided with a plurality of distance detectors for detecting an obstacle, and when the obstacle enters the detection range of the distance detector, an alarm is issued, and the robot is controlled
  • the torso stops moving forward or turns.
  • a schematic diagram of the distribution of the detector head portion from the detector head portion is shown.
  • the distance detector may also be disposed on the front and rear of the robot torso, that is, the front chest, the back, and the left and right sides of the robot trunk.
  • the distance detector When the distance detector is placed on the head, the distance of the higher obstacle can be detected.
  • the relatively low obstacle distance When it is placed on the torso of the robot, the relatively low obstacle distance can be detected.
  • FIG. 1 taking a schematic view of the top view of the robot head as an example to illustrate the arrangement of the distance detectors: wherein the robot heads 1 are sequentially arranged in the up and down and left and right directions of the paper: front and rear of the robot. Rear, left and right.
  • the distance detector distributed on the robot head includes an infrared sensor and an ultrasonic sensor.
  • the detection distance of the infrared sensor is 0.4 meters, and the detection distance of the ultrasonic sensor is about 0.7 meters to 7 meters.
  • the infrared sensor and the ultrasonic sensor are equally spaced apart and distributed in front of and behind the robot head. That is, the distance detectors distributed in front of and behind the robot head are the infrared sensor 11, the ultrasonic sensor 12, the infrared sensor 32, and the ultrasonic sensor 31, respectively.
  • the infrared sensor 11, the ultrasonic sensor 12, the infrared sensor 32, and the ultrasonic sensor 31 are distributed between the four, and are equally spaced.
  • the distribution of the present embodiment is mainly for clearing the distribution manner of the four descriptions. In other embodiments, the four can also perform the overall exchange of the left and right positions.
  • the ultrasonic sensor and the infrared sensor are distributed on the left side and the right side of the robot head, respectively detecting front and rear sides, and right and left obstacle distances.
  • the number of the ultrasonic sensor and the infrared sensor distributed on the left and right sides of the robot head is three, and one of the infrared sensors is located between the two ultrasonic sensors.
  • the ultrasonic sensor 21, the infrared sensor 22, the ultrasonic sensor 23, the ultrasonic sensor 41 on the right side, the infrared sensor 42, and the ultrasonic sensor 43 are distributed on the left side of the robot.
  • the ultrasonic sensor 21 and the ultrasonic sensor 23 are respectively used to detect the obstacle distances in the left front and rear left regions; the ultrasonic sensor 41 and the ultrasonic sensor 43 are used to detect the obstacle distances in the right front and right rear regions.
  • the infrared sensors 22 and 42 are both used to detect the obstacle distance in the area directly in front of the left and right sides.
  • the device further includes a Bluetooth transmitting device disposed on the table of the target meal delivery, and a matching with the Bluetooth transmitting device disposed on the automatic obstacle avoidance feeding robot. Accept the device to intelligently select the nearest meal delivery route.
  • the front wheel disposed at the bottom of the torso of the robot is controlled by a servo motor, and the servo motor controls the body torso steering by using a PID mode. That is, when the feeding robot encounters a roadblock, it retreats or turns left and right, and automatically adjusts the route to achieve an obstacle.
  • the working process of the automatic obstacle avoidance feeding robot is as follows: firstly, two spaced ultrasonic sensors 12 and 21 detect obstacles at a long distance, and the distances L1 and L2 detected by the sensors 12 and 21 are averaged. As the detection result L3, when 0.8 ⁇ L3 ⁇ 1.5 m, this means that there is an obstacle not far from the front, and the speed of the robot can be adjusted to reduce the speed of the robot.
  • the infrared sensors 11 and 32 in the front and rear directions of the robot detect obstacles at a relatively close distance
  • the average value L6 of the obstacle distances L4 and L5 detected by the two infrared sensors is the detection result.
  • L6 ⁇ 0.4 immediately stop moving forward or backward, and determine whether to turn left or right according to the detection results in the left and right directions to achieve obstacle avoidance.
  • the sensors on the left and right sides of the robot directly detect the left front, the left rear left front and the right front, the right rear and the right front.
  • the left front ultrasonic sensor 21 detection distance L7, the left rear ultrasonic sensor 23 detection distance L8, the right front ultrasonic sensor 41 detection distance L9, and the right rear ultrasonic sensor 43 detection distance L10 are directly used as detection results, when L7, L8, L9, and L10
  • the distance detected in any direction is between 0.8 and 1.5 meters, allowing the robot to slow down.
  • the left and right rotation should be stopped immediately.
  • the food delivery robot can select a avoidance path. If there is an obstacle on the front side and there are no obstacles on the left or right side, the robot can arbitrarily choose to turn left or right to avoid the obstacle. The specific direction to which it is turned is based on the distance from which table the distance is going. It is preferred to choose where to go.
  • the embodiment further discloses an obstacle avoidance method for the automatic obstacle avoidance feeding robot, which comprises the following steps:
  • an infrared sensor and an ultrasonic sensor are installed on the robot head; wherein an infrared sensor and an ultrasonic sensor are respectively arranged at the front and the rear of the robot head, and the infrared sensor and the ultrasonic sensor are cross-distributed; the left and right sides of the robot head Each is provided with two ultrasonic sensors and one infrared sensor, and the one infrared sensor is located between the two ultrasonic sensors;
  • the distance between the ultrasonic sensor in front and the ultrasonic sensor in front of the adjacent side respectively detect the distance of the obstacle, which are respectively recorded as: L1 meter, L2 meter; if the average value of L1 and L2 is greater than 0.8 and less than 1.5, the prompt There are obstacles in front;
  • the distance between the front infrared sensor and the adjacent side infrared sensor is detected as: L4, L5; if the average value of L4 and L5 is greater than 0 and less than 0.4, it indicates that there is an obstacle in front;
  • the distance between the obstacles is detected by the ultrasonic sensors located on the front, rear, and right sides of the left side; when any of the detection distances is between 0.8 meters and 1.5 meters, the robot's torso is decelerated and advanced.
  • the step of automatically turning the robot trunk when the steering is turned, if the distance detected by the infrared sensors on the left and right sides is less than 0.4 m, the steering is stopped. .
  • the automatic obstacle avoidance feeding robot and the obstacle avoiding method provide a feeding robot, which can effectively and quickly avoid pedestrians and obstacles in a restaurant with a complicated environment, and can also select an optimal path for sending. Meals, so as to achieve the purpose of fast meal delivery.

Abstract

一种自动避障的送餐机器人及避障方法,机器人包括:机器人头部(1),机器人躯干以及设于机器人躯干两侧的两个手臂,手臂上各固定有用于放置菜品的餐盘;其中,机器人头部(1)或机器人躯干上设有若干用于检测障碍物的距离探测器,当障碍物进入距离探测器的探测范围时,发出报警,并控制机器人躯干停止前进或转向。自动避障的送餐机器人,通过在机器人上设置多个红外传感器和超声波传感器,通过传感器探测周围的障碍物,从而有效避免了送餐机器人碰撞等产生的意外,并智能规划最佳送餐路线,使送餐机器人更安全,送餐快捷高效。

Description

一种自动避障的送餐机器人及避障方法
技术领域
本发明涉及智能机器人技术领域,尤其涉及一种自动避障的送餐机器人及避障方法。
背景技术
现有技术中的送餐机器人,都是通过在机器人底部安装灰度识别传感器,然后按照预设好的轨道进行送餐,但是如果在预设的轨道上有人经过,或者是有东西停留在预设轨道上,该送餐机器人因为无法识别预设轨道而不能继续前行送餐,更甚者有可能会撞上在轨道上的东西或人,这样不仅会使得送餐效率降低,还有可能发生因为撞到人,导致菜羹等洒出来烫伤人的危险。因现有技术的送餐机器人无法实现实时避障功能,故需要一种可自动规避障碍物的送餐机器人。
发明内容
本发明的目的在于提供一种自动避障的送餐机器人,用于解决现有送餐机器人无法自动避障的技术问题。
为达到上述目的,本发明所提出的技术方案为:
本发明的一种自动避障的送餐机器人,其包括:机器人头部,机器人躯干以及设于机器人躯干两侧的两个手臂,所述手臂上各固定有用于放置菜品的餐盘;其中,所述机器人头部或机器人躯干上设有若干用于检测障碍物的距离探测器,当障碍物进入所述距离探测器的探测范围时,发出报警,并控制所述机器人躯干停止前进或转向。
其中,所述的距离探测器包括红外传感器和超声波传感器。
其中,所述红外传感器和超声波传感器等间隔交叉的分布于机器人头部或机器人躯干的前、后方。
其中,所述的超声波传感器和红外传感器数目均为二。
其中,所述的超声波传感器和红外传感器分布于机器人头部或机器人躯干的左侧和右侧,分别探测两侧前、后方,以及正左、右侧障碍物距离。
其中,分布于机器人头部左右两侧的所述超声波传感器和红外传感器的总数目均为三,其中一红外传感器位于二超声波传感器之间。
其中,还包括设置于目标送餐的餐桌上的蓝牙发送装置,以及设于自动避障的送餐机器人上的与所述蓝牙发送装置匹配的接受装置。
其中,设于所述机器人躯干底部的前轮受控于伺服电机,所述伺服电机采用PID方式控制机器人躯干转向。
一种自动避障的送餐机器人的避障方法,其包括以下步骤:
第一步,在机器人头部安装红外传感器和超声波传感器;其中,机器人头部或机器人躯干的前后方各设有一红外传感器和超声波传感器,所述红外传感器和超声波传感器交叉分布;机器人头部或机器人躯干的左右两侧各设有二超声波传感器和一红外传感器,且所述一红外传感器位于二超声波传感器之间;
第二步,由前方的超声波传感器与相邻侧前方的超声波传感器分别探测障碍物的距离,分别记为:L1米,L2米;若L1和L2的平均值大于0.8且小于1.5,则提示前方有障碍物;
第三步,由前方的红外传感器与相邻侧红外传感器探测障碍物距离,分别记为:L4,L5;若L4和L5的平均值大于0小于0.4,则提示前方有障碍物;
第四步,由位于左侧前、后方和右侧前后、方的超声波传感器分别探测障碍物的距离;当其中任意探测距离位于0.8米至1.5米之间时,则控制机器人躯干减速前进。
其中,所述的第二、第三和第四步之后均包括:机器人躯干自动转向的步骤,转向时,若左右两侧的红外传感器探测的障碍物距离小于0.4米时,停止转向。
与现有技术相比,本发明中的自动避障的送餐机器人,通过在机器人上设置多个红外传感器和超声波传感器,通过传感器探测周围的障碍物,从而有效避免了送餐机器人碰撞等产生的意外,为送餐机器人避障以及换向提供了距离数据,使送餐机器人更安全,更可靠,送餐更快捷。
附图说明
图1为本发明自动避障的送餐机器人的机器人头部探测器分布结构示意图。
图2为本发明的自动避障的送餐机器人的避障方法流程图。
具体实施方式
以下参考附图,对本发明予以进一步地详尽阐述。
请参阅附图1,在本实施例中,该自动避障的送餐机器人,其包括:机器人头部1,机器人躯干以及设于机器人躯干两侧的两个手臂,所述手臂上各固定有用于放置菜品的餐盘;其中,所述机器人头部1设有若干用于检测障碍物的距离探测器,当障碍物进入所述距离探测器的探测范围时,发出报警,并控制所述机器人躯干停止前进或转向。在本实施例中,以机器人头部1部分距离探测器的分布示意图。在其他实施例中,所述的距离探测器也可以设于机器人躯干的前后左右,即机器人躯干的前胸,后背以及左右两侧。当将距离探测器设于头部时,可以探测较高障碍物的距离,设于机器人躯干上时,可以探测相对较低的障碍物距离。
更具体的,请再次参阅附图1,以机器人头部的俯视分布示意图为例说明距离探测器的排布方式:其中,机器人头部1按照纸张上下、左右方向依次设为:机器人的前后,后方,左侧和右侧。
其中,所述的分布于机器人头部上的距离探测器包括红外传感器和超声波传感器。其中红外传感器的探测距离为0.4米,超声波传感器的探测距离约为0.7米至7米。
其中,所述红外传感器和超声波传感器等间隔交叉的分布于机器人头部的前、后方。即,分布于机器人头部前后方的距离探测器分别为,红外传感器11,超声波传感器12,红外传感器32以及超声波传感器31。红外传感器11、超声波传感器12、红外传感器32以及超声波传感器31四者之间交叉分布,且等间隔分布。当然,本实施例的分布主要是为了清除描述四者的分布方式,在其他实施例中,四者也可以进行左右位置的整体交换。
其中,所述的超声波传感器和红外传感器分布于机器人头部的左侧和右侧,分别探测两侧前、后方,以及正左、右侧障碍物距离。分布于机器人头部左右两侧的所述超声波传感器和红外传感器的数目均为三,其中一红外传感器位于二超声波传感器之间。具体为,分布于机器人左侧的超声波传感器21,红外传感器22,超声波传感器23;右侧的超声波传感器41,红外传感器42,及超声波传感器43。其中超声波传感器21和超声波传感器23分别用于检测左前方和左后方区域障碍物距离;超声波传感器41和超声波传感器43用于检测右前方和右后方区域障碍物距离。而红外传感器22和42均用于检测左右两侧正前方的区域障碍物距离。
其中,为了快速与送餐目的地之间进行路线规划,还包括设置于目标送餐的餐桌上的蓝牙发送装置,以及设于自动避障的送餐机器人上的与所述蓝牙发送装置匹配的接受装置,从而智能选择最近的送餐路线。
其中,设于所述机器人躯干底部的前轮受控于伺服电机,所述伺服电机采用PID方式控制机器人躯干转向。即当送餐机器人遇到路障时,后退或左右转向,自动调整路线以实现越过障碍物。
该自动避障的送餐机器人的工作过程如下:首先是两个间隔的超声波传感器12和21探测到稍远距离有障碍物,将该传感器12和21探测到的距离L1,L2求其平均值,作为探测结果L3,当0.8 < L3< 1.5米时,这意味着前方不远处有障碍物,此时可调整降低机器人前行的速度。
更进一步的,当机器人前后两个方向的红外传感器11和32探测到比较近的距离有障碍物时,取其两个红外传感器探测到的跟障碍物距离L4和L5的平均值L6为探测结果。当0< L6 < 0.4时,即刻停止前行或者后退,根据左右两个方向的探测结果来确定往左转还是往右转来实现避障的功能。
更进一步的,机器人的左右两侧的传感器,分别直接探测左前方,左后方左侧正前方以及右前方,右后方和右侧正前方的区域。将左前方超声波传感器21探测距离L7、左后方超声波传感器23探测的距离L8、右前方超声波传感器41探测距离L9、右后方超声波传感器43探测距离L10直接作为探测结果,当L7、L8、L9和L10任何一个方向探测到的距离在0.8米到1.5米之间,即可让机器人减速行驶。
更进一步的,当左右两侧的红外传感器22和42探测到的距离L11和L12的距离在0到0.4米之间时,应该立刻停止左右转动。
更进一步的,该送餐机器人可以选择避让路径。当前方有障碍物,而左右或者后方没有障碍物时,该机器人可以任意选择左转或者右转来躲避障碍物,具体往哪边转,是根据从哪边走距离要去的餐桌距离近,就优先选择从哪边走。
本实施例还公开了一种自动避障的送餐机器人的避障方法,其包括以下步骤:
第一步S1,在机器人头部安装红外传感器和超声波传感器;其中,机器人头部的前后方各设有一红外传感器和超声波传感器,所述红外传感器和超声波传感器交叉分布;机器人头部的左右两侧各设有二超声波传感器和一红外传感器,且所述一红外传感器位于二超声波传感器之间;
第二步S2,由前方的超声波传感器与相邻侧前方的超声波传感器分别探测障碍物的距离,分别记为:L1米,L2米;若L1和L2的平均值大于0.8且小于1.5,则提示前方有障碍物;
第三步S3,由前方的红外传感器与相邻侧红外传感器探测障碍物距离,分别记为:L4,L5;若L4和L5的平均值大于0小于0.4,则提示前方有障碍物;
第四步S4,由位于左侧前、后方和右侧前后、方的超声波传感器分别探测障碍物的距离;当其中任意探测距离位于0.8米至1.5米之间时,则控制机器人躯干减速前进。
其中,所述的第二S2、第三S3和第四步S4之后均包括:机器人躯干自动转向的步骤,转向时,若左右两侧的红外传感器探测的障碍物距离小于0.4米时,停止转向。
本实施例中的自动避障的送餐机器人及避障方法,提供了一种送餐机器人,可以解决在复杂环境的餐厅内实现有效快速避让行人及障碍物,还可以选择最佳路径进行送餐,从而达到快速送餐的目的。
上述内容,仅为本发明的较佳实施例,并非用于限制本发明的实施方案,本领域普通技术人员根据本发明的主要构思和精神,可以十分方便地进行相应的变通或修改,故本发明的保护范围应以权利要求书所要求的保护范围为准。

Claims (10)

  1. 一种自动避障的送餐机器人,其特征在于,包括:机器人头部,机器人躯干以及设于机器人躯干两侧的两个手臂,所述手臂上各固定有用于放置菜品的餐盘;其中,所述机器人头部或机器人躯干上设有若干用于检测障碍物的距离探测器,当障碍物进入所述距离探测器的探测范围时,发出报警,并控制所述机器人躯干停止前进或转向。
  2. 如权利要求1所述的自动避障的送餐机器人,其特征在于,所述的距离探测器包括红外传感器和超声波传感器。
  3. 如权利要求2所述的自动避障的送餐机器人,其特征在于,所述红外传感器和超声波传感器等间隔交叉的分布于机器人头部或机器人躯干的前、后方。
  4. 如权利要求3所述的自动避障的送餐机器人,其特征在于,所述的超声波传感器和红外传感器数目均为二。
  5. 如权利要求2所述的自动避障的送餐机器人,其特征在于,所述的超声波传感器和红外传感器分布于机器人头部或机器人躯干的左侧和右侧,分别探测两侧前、后方,以及正左、右侧障碍物距离。
  6. 如权利要求5所述的自动避障的送餐机器人,其特征在于,分布于机器人头部左右两侧的所述超声波传感器和红外传感器的总数目均为三,其中一红外传感器位于二超声波传感器之间。
  7. 如权利要求1至6任意一项所述的自动避障的送餐机器人,其特征在于,还包括设置于目标送餐的餐桌上的蓝牙发送装置,以及设于自动避障的送餐机器人上与所述蓝牙发送装置匹配的接收装置。
  8. 如权利要求1至6任意一项所述的自动避障的送餐机器人,其特征在于,设于所述机器人躯干底部的前轮受控于伺服电机,所述伺服电机采用PID方式控制机器人躯干转向。
  9. 一种自动避障的送餐机器人的避障方法,其特征在于,包括以下步骤:
    第一步,在机器人头部安装红外传感器和超声波传感器;其中,机器人头部或机器人躯干的前后方各设有一红外传感器和超声波传感器,所述红外传感器和超声波传感器交叉分布;机器人头部或机器人躯干的左右两侧各设有二超声波传感器和一红外传感器,且所述一红外传感器位于二超声波传感器之间;
    第二步,由前方的超声波传感器与相邻侧前方的超声波传感器分别探测障碍物的距离,分别记为:L1米,L2米;若L1和L2的平均值大于0.8且小于1.5,则提示前方有障碍物;
    第三步,由前方的红外传感器与相邻侧红外传感器探测障碍物距离,分别记为:L4,L5;若L4和L5的平均值大于0小于0.4,则提示前方有障碍物;
    第四步,由位于左侧前、后方和右侧前后、方的超声波传感器分别探测障碍物的距离;当其中任意探测距离位于0.8米至1.5米之间时,则控制机器人躯干减速前进。
  10. 如权利要求9所述的自动避障的送餐机器人的避障方法,其特征在于,所述的第二步、第三步和第四步之后均包括:机器人躯干自动转向的步骤,转向时,若左右两侧的红外传感器探测的障碍物距离小于0.4米时,停止转向。
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