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Tobias Glaser
PAT
Commits
f06d270f
Commit
f06d270f
authored
2 years ago
by
Tobias Glaser
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Distance&Angle without ROS
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VL53L1XtoDistAngle.py
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VL53L1XtoDistAngle.py
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f06d270f
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Beispiel-Skript für den STM TOF-Sensor VL53L1X
# Grundgeruest stammt aus VL53L1X library for Arduino von Pololu
# github.com/pololu/vl53l1x-arduino fuer Arduino.
# Version mit ROI-Zentrum in Richtung lange Seite des Sensors mit nur 4 Winkeln scannen.
# Da der ROI minimal 4 Pixel breit sein muss, kann dieser um bis zu 13 (überlappenden)
# Positionen verschoben werden. Ohne Überlappung nur um 4 Position = 4 Scanwinkel.
# Vom Sensor wird nur die Reichweite abgefragt, damit höhere Messrate.
# Modul VL53L1XRegAddr.py mit den Registeradressen sowie Modul tofSens.py
# müssen im selben Verzeichnis sein.
# Objektorientierte Variante des Skripts, Ausgabe Werte als Floats.
# S. Mack, 14.11.22
import
smbus
import
sys
import
math
import
numpy
as
np
from
time
import
sleep
import
VL53L1XRegAddr
as
REG
from
tofSens
import
TofSens
,
countRateFixedToFloat
,
writeReg
,
writeReg16Bit
,
writeReg32Bit
,
readReg
,
readReg16Bit
DEBUG_PRINT
=
False
# ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
# Variablen ------------------------------------------------------------------
# ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
calibrated
=
False
;
# ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
# main()----------------------------------------------------------------------
# ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
try
:
print
(
"
Python-Interpreter: {}
\n
"
.
format
(
sys
.
version
))
i2c
=
smbus
.
SMBus
(
2
)
# I2C-Kommunikation aktivieren
my_tof
=
TofSens
(
i2c
,
ic2_addr
=
0x29
,
timeout_ms
=
500
)
if
not
my_tof
.
initSensor
(
True
):
print
(
'
Failed to detect and initialize sensor!
'
)
else
:
print
(
'
Sensor Initialisierung i.O.
'
)
# The minimum timing budget is 20 ms for short distance mode and 33 ms for
# medium and long distance modes. See the VL53L1X datasheet for more
# information on range and timing limits.
my_tof
.
setDistanceMode
(
0
)
# 0=short, 1=medium, 2=long
my_tof
.
setMeasurementTimingBudget
(
20000
)
# µs nicht! ms eingeben!
# Groesse des ROI festlegen, x=horizontal Laengsrichtung Sensorchip
my_tof
.
setROISize
(
4
,
16
)
# x min 4, y (Hoehe) min 4 max 16
while
(
1
):
ranges
=
[]
# 13 Scanwinkel 0...12 = range(13), 4 Scanwinkel 0,4,8,12 = range(0,13,4)
for
angle
in
range
(
0
,
13
,
4
):
roi_center
=
8
*
angle
+
151
;
my_tof
.
setROICenter
(
roi_center
)
# ROI setzen
my_tof
.
sensorReadSingle
(
blocking
=
True
)
# Abstandswert auslesen (blocking und nur Reichweite)
ranges
.
append
(
round
(
my_tof
.
ranging_data
[
'
range_mm
'
],
0
))
ranges
[
0
]
+=
9
ranges
[
1
]
+=
5
position_x
=
[
0
,
0
,
0
,
0
]
position_y
=
[
0
,
0
,
0
,
0
]
angles
=
[
-
10.8
,
-
3.6
,
3.6
,
10.8
]
steigung
=
0
mean_x1
=
0
mean_y1
=
0
parameter_zaehler
=
0
parameter_nenner
=
0
for
i
in
range
(
0
,
4
):
position_y
[
i
]
=
round
(
ranges
[
i
]
*
math
.
cos
(
math
.
radians
(
angles
[
i
])),
2
)
position_x
[
i
]
=
round
(
ranges
[
i
]
*
math
.
sin
(
math
.
radians
(
angles
[
i
])),
2
)
mean_x1
+=
position_x
[
i
]
mean_y1
+=
position_y
[
i
]
if
(
i
==
3
):
mean_x
=
mean_x1
/
4
mean_y
=
mean_y1
/
4
for
i
in
range
(
0
,
4
):
parameter_zaehler
+=
(
position_x
[
i
]
-
mean_x
)
*
(
position_y
[
i
]
-
mean_y
)
parameter_nenner
+=
(
position_x
[
i
]
-
mean_x
)
**
2
parameter_b
=
parameter_zaehler
/
parameter_nenner
steigung
=
mean_y
-
parameter_b
*
mean_x
line
=
np
.
polyfit
(
position_x
,
position_y
,
1
)
p
=
np
.
poly1d
(
line
)
winkel
=
(
180
/
math
.
pi
)
*
np
.
arctan
(
parameter_b
)
#winkel_2 = (180/math.pi)*math.atan(p[1])
winkel_test
=
math
.
atan
(
p
[
1
])
winkel_2
=
math
.
degrees
(
winkel_test
)
#print('Range (mm): ',end='')
#print(*ranges, sep=', ')
#print(parameter_b)
#print(ranges)
#print(p, 'polyfit')
#print(p[1],'polyfit steigung')
#print(parameter_b,'steigung berechnet')
#print(winkel,'winkel berechnet')
print
(
'
Abstand
'
,
p
[
0
])
print
(
'
winkel
'
,
winkel_2
)
#print('x', position_x)
#print('y', position_y)
#print('range', ranges)
#print('Angle (°): -10.8, -3.6, 3.6, 10.8')
except
KeyboardInterrupt
:
print
(
'
'
)
i2c
.
close
()
print
(
'
...i2c-bus closed.
'
)
print
(
'
ByeBye
'
)
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