利用超声波雷达寻找车位算法python
时间: 2023-09-13 17:10:30 浏览: 73
以下是一种基于Python的利用超声波雷达寻找车位的算法:
1. 导入必要的库
```python
import RPi.GPIO as gpio
import time
```
2. 设置GPIO引脚
```python
gpio.setmode(gpio.BOARD)
trig_pin = 16
echo_pin = 18
gpio.setup(trig_pin, gpio.OUT)
gpio.setup(echo_pin, gpio.IN)
```
3. 定义超声波雷达测距函数
```python
def distance():
gpio.output(trig_pin, True)
time.sleep(0.00001)
gpio.output(trig_pin, False)
pulse_start = time.time()
pulse_end = time.time()
while gpio.input(echo_pin) == 0:
pulse_start = time.time()
while gpio.input(echo_pin) == 1:
pulse_end = time.time()
pulse_duration = pulse_end - pulse_start
distance = pulse_duration * 17150
distance = round(distance, 2)
return distance
```
4. 定义判断车位是否空闲的函数
```python
def is_parking_space_available():
distance_threshold = 50 # 设定阈值
distance_sum = 0
readings = 5 # 取5次距离的平均值
for i in range(readings):
distance_sum += distance()
time.sleep(0.1)
avg_distance = distance_sum / readings
if avg_distance > distance_threshold:
return True
else:
return False
```
5. 主程序
```python
while True:
if is_parking_space_available():
print("有空闲车位!")
else:
print("无空闲车位!")
time.sleep(1)
```
这个程序会不断地检测车位的空闲情况,并根据距离阈值判断车位是否空闲。如果距离大于阈值,则判断车位为空闲,否则判断车位已被占用。可以根据实际情况调整阈值和读数次数。