为什么代码运行之后舵机只能朝着一个方向使劲走?
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import sensor, image, time from pid import PID from pyb import Servo pan_servo=Servo(1) tilt_servo=Servo(2) pan_servo.calibration(500,2500,500) tilt_servo.calibration(500,2500,500) red_threshold = (42, 57, 21, 57, -10, 29) pan_pid = PID(p=0.02, i=0, imax=90) #脱机运行或者禁用图像传输,使用这个PID tilt_pid = PID(p=0.02, i=0, imax=90) #脱机运行或者禁用图像传输,使用这个PID #pan_pid = PID(p=0.1, i=0, imax=90)#在线调试使用这个PID #tilt_pid = PID(p=0.1, i=0, imax=90)#在线调试使用这个PID sensor.reset() # Initialize the camera sensor. sensor.set_pixformat(sensor.RGB565) # use RGB565. sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed. sensor.skip_frames(10) # Let new settings take affect. sensor.set_auto_whitebal(False) # turn this off. clock = time.clock() # Tracks FPS. def find_max(blobs): max_size=0 for blob in blobs: if blob[2]*blob[3] > max_size: max_blob=blob max_size = blob[2]*blob[3] return max_blob while(True): clock.tick() # Track elapsed milliseconds between snapshots(). img = sensor.snapshot() # Take a picture and return the image. blobs = img.find_blobs([red_threshold]) if blobs: max_blob = find_max(blobs) pan_error = max_blob.cx()-img.width()/2 tilt_error = max_blob.cy()-img.height()/2 print("pan_error: ", pan_error) img.draw_rectangle(max_blob.rect()) # rect img.draw_cross(max_blob.cx(), max_blob.cy()) # cx, cy pan_output=pan_pid.get_pid(pan_error,1)/2 tilt_output=tilt_pid.get_pid(tilt_error,1) print("pan_output",pan_output) pan_servo.angle(pan_servo.angle()+pan_output) tilt_servo.angle(tilt_servo.angle()-tilt_output)
想问两个问题,
为什么代码运行之后舵机只能朝着一个方向使劲走啊,比如负责上下的云台舵机只往上走,负责左右的云台舵机只往右走(代码是云台跟踪颜色的代码,但实际上运用的时候检测到在摄像头上方/右方会跟踪,检测到在摄像头左方不会跟踪)
另外一个问题就是,代码里面框出来的那两句代码
pan_servo.calibration(500,2500,500)
tilt_servo.calibration(500,2500,500)
我看不懂意思,please教教我
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calibration是舵机的脉宽参数:https://singtown.com/product/536/st90s/
你使用的是配套的云台?