? 01测试数据自动记录
两组万用表集成在实验台上，可以通过网络连接PYTHON语句自动输入万用表读数CSDN的markdown提高试验记录的效率和准确性。
- 第一组万用表：使用MEGA8单片机中继通过UART连入计算机 (1) FLUKE45；(2) FLUKE45；(3) LINT-T； (4)MASTECK
- 第二组万用表：使用网络连入计算机 （1） RIGOL DM3068
记录数据的PYTHON命令： meterrec: CMD
▲ 左：指尖鼠标；右：拆卸继电器线圈
为了方便解放双手操作测量万用表的表笔，用指尖鼠标按下触发记录的鼠标左键。鼠标的动作是用铁丝和继电器线圈触摸的。
? 02驱动制作
1.驱动电路
因为电磁铁来自220V由220驱动的小型继电器直接采用控制电路V室内交流整流后的电压驱动。
永磁铁安装在鼠标按动铁丝底部，以增加动作力。
▲ 驱动电路图
2.动作效果
▲ 按键动作
3.为什么需要220VAC整流滤波？
-
尽管直接施220V交流电压到继电器的线圈可以吸引铁（电线），但由于电磁电缆的固定位置有一个大型永磁铁。由于外部强磁场的偏执，吸引力大幅抖动（50Hz），而不是100Hz脉动吸引力。
-
使用半波整流，这50也出现了Hz脉动吸引力使继电器作用在小磁铁上的力大幅抖动。
-
只有通过全波整理和滤波，产生的力才能相对稳定。
※ 程序代码
下面是METERREC对应的PYTHON命令：
#!/usr/local/bin/python # -*- coding: gbk -*- #============================================================ # METERREC.PY -- by Dr. ZhuoQing 2020-07-06 # # Note: #============================================================ from headm import * import os from tsmodule.tsstm32 import * from tsmodule.tsvisa import * #------------------------------------------------------------ csdn_title = '写文章-CSDN博客' #============================================================ #------------------------------------------------------------ def val2decimalstring(val, dn=-1): if dn == 0: return '%d '%val elif dn == 1: return '%3.1f '%val elif dn == 2
:
return
'%4.2f '
%val
elif dn
==
3
:
return
'%5.3f '
%val
elif dn
==
4
:
return
'%6.4f '
%val
elif dn
==
5
:
return
'%7.5f '
%val
elif dn
==
6
:
return
'%8.6f '
%val
elif dn
==
7
:
return
'%9.7f '
%val
elif dn
==
8
:
return
'%10.8f '
%val
else
:
return
'%f '
%val
#------------------------------------------------------------
def
getchannelval
(ch
)
:
if ch
==
9
:
input
= tspinputline
(string
=
''
, hint
=
'Input Value'
, title
=
'Input'
)
.strip
(
' '
)
if
len
(
input
)
>
0
:
return
float
(
input
)
else
:
return
0
if ch
<
4
:
for i
in
range
(
20
)
: meter
= meterval
(
)
if
len
(meter
)
>=
4
: val
= meter
[ch
]
break
else
: val
=
0
elif ch
==
4
: val
= dm3068vdc
(
)
elif ch
==
5
: val
= dm3068vac
(
)
elif ch
==
6
: val
= dm3068res
(
)
elif ch
==
7
: val
= dm3068freq
(
)
else
: val
= dm3068vdc
(
)
return val
#------------------------------------------------------------
def
waitclick
(
)
: tspbeep
(
1800
,
350
)
while
True
: key
= tspread
(
)
if key
[
2
]
!=
0
or key
[
3
]
!=
0
:
break time
.sleep
(
.5
)
while
True
: key
= tspread
(
)
if key
[
2
]
==
0
or key
[
3
]
==
0
:
break time
.sleep
(
.5
)
#------------------------------------------------------------
def
tspclickaction
(func1
=
None
, func2
=
None
)
:
global workmode
global tablesection
, tableid
global ch1data
, ch2data
, ch3data
, ch4data
global ch5data
, ch6data
, ch7data
, ch8data
#--------------------------------------------------------
def
f1
(
)
: tspmsg
(
'msg \a'
)
def
f2
(
)
: printf
(
'\a'
)
if func1
==
None
: func1
= f1
if func2
==
None
: func2
= f2
#-------------------------------------------------------- codeflag
=
0
if
len
(tablesection
)
>
0
: printf
(
' '
.join
(tablesection
)
) linenum
=
0
#--------------------------------------------------------
while
True
:
if codeflag
==
0
: time
.sleep
(
.5
)
else
: time
.sleep
(
.5
) key
= tspread
(
)
if key
[
7
]
!=
0
and codeflag
==
0
:
if key
[
2
]
!=
0
: tspmsgcopy
(
) tspclr
(
) tspbeep
(
1200
,
100
) codeflag
=
1
if
len
(tablesection
)
>
0
: tspexecutepythoncmd
(
'cdpt'
)
if
len
(tablesection
)
>
0
: printf
(
' '
.join
(tablesection
)
)
continue
if key
[
3
]
!=
0
:
return
if key
[
2
]
!=
0
and codeflag
==
0
: codeflag
=
1
continue
if key
[
3
]
!=
0
and codeflag
==
0
: codeflag
=
2
continue
if codeflag
!=
0
:
if key
[
2
]
==
0
and key
[
3
]
==
0
:
if codeflag
==
1
: func1
(
) linenum
= linenum
+
1
if
len
(tablesection
)
>
0
:
if linenum
>=
len
(tablesection
)
- tableid
: func2
(
) linenum
=
0
elif codeflag
==
2
:
if
len
(tablesection
)
==
0
: func2
(
)
if workmode
==
1
: ch1data
=
[
] ch2data
=
[
] ch3data
=
[
] ch4data
=
[
] ch5data
=
[
] ch6data
=
[
] ch7data
=
[
] ch8data
=
[
] tspclr
(
) printf
(
'Record data %s at %s:'
%
(datafilename
,
str
(datachannel
)
)
)
else
: tspclr
(
) tspbeep
(
1200
,
200
)
if
len
(tablesection
)
>
0
: printf
(
' '
.join
(tablesection
)
) linenum
=
0 codeflag
=
0
continue
if key
[
2
]
!=
0
and key
[
3
]
!=
0
:
if codeflag
==
1
: printf
(
"\r\n"
) tspmsgcopy
(
) tspbeep
(
1200
,
100
) codeflag
=
3
if
len
(tablesection
)
>
0
: tspexecutepythoncmd
(
'cdpt'
) time
.sleep
(
1.5
) tspclr
(
)
if
len
(tablesection
)
>
0
: printf
(
' '
.join
(tablesection
)
) tspbeep
(
1500
,
100
)
continue
elif codeflag
==
2
:
return
#------------------------------------------------------------ windowtitle
= tspgetwindowtitle
(
) findflag
=
0 meterfile
= r
'D:\zhuoqing\window\cb\MyResearch\Test\TestAD5344\M8BL_BAS\M8BL_BAS.exe'
for wt
in windowtitle
:
if wt
.find
(
'MEGA8 DOWLOAD PROGERAM'
)
>=
0
: findflag
=
1
break
if findflag
==
0
: os
.system
(meterfile
) time
.sleep
(
.5
) tspbeep
(
1200
,
200
)
#============================================================
#------------------------------------------------------------ workmode
=
0
# 0 Record the table data
# 1 Record data file meterid
=
0
#decimalnum = -1 # Decimal number no limited decimaldim
=
[
-
1
]
*
32 datafilename
=
'' datachannel
=
[
] waitchannel
=
[
] tablesection
=
[
]
# tableid
=
0
#
#------------------------------------------------------------
if
len
(sys
.argv
)
>
1
:
#--------------------------------------------------------
if sys
.argv
[
1
]
[
0
]
==
'#'
: chstr
= sys
.argv
[
1
]
[
1
:
] dnum
=
-
1
if chstr
.find
(
'.'
)
>
0
: csc
= chstr
.split
(
'.'
)
if csc
[
0
]
.isdigit
(
)
and csc
[
1
]
.isdigit
(
)
: ch
=
int
(csc
[
0
]
) dnum
=
int
(csc
[
1
]
) chval
= getchannelval
(ch
) insertstr
= val2decimalstring
(chval
, dnum
) clipboard
.copy
(insertstr
) tspsendwindowkey
(csdn_title
,
'v'
, control
=
1
, noreturn
=
1
) clipboard
.copy
(
''
) tspfocuswindow
(csdn_title
) exit
(
)
elif chstr
.isdigit
(
)
: ch
=
int
(chstr
) dnum
=
-
1 chval
= getchannelval
(ch
) insertstr
= val2decimalstring
(chval
, dnum
) clipboard
.copy
(insertstr
) tspsendwindowkey
(csdn_title
,
'v'
, control
=
1
, noreturn
=
1
) clipboard
.copy
(
''
) tspfocuswindow
(csdn_title
) exit
(
)
elif chstr
==
'dt'
: insertstr
= time
.strftime
(
'%Y-%m-%d %H:%M:%S'
) clipboard
.copy
(insertstr
) tspsendwindowkey
(csdn_title
,
'v'
, control
=
1
, noreturn
=
1
) clipboard
.copy
(
''
) tspfocuswindow
(csdn_title
) exit
(
)
elif chstr
==
'date'
or chstr
==
'd'
: insertstr
= time
.strftime
(
'%Y-%m-%d'
) clipboard
.copy
(insertstr
) tspsendwindowkey
(csdn_title
,
'v'
, control
=
1
, noreturn
=
1
) clipboard
.copy
(
''
) tspfocuswindow
(csdn_title
) exit
(
)
elif chstr
==
'time'
or chstr
==
't'
: insertstr
= time
.strftime
(
'%H:%M:%S'
) clipboard
.copy
(insertstr
) tspsendwindowkey
(csdn_title
,
'v'
, control
=
1
, noreturn
=
1
) clipboard
.copy
(
''
) tspfocuswindow
(csdn_title
) exit
(
)
#--------------------------------------------------------
if sys
.argv
[
1
]
.isdigit
(
)
==
False
and\ sys
.argv
[
1
]
.find
(
'.'
)
<
0
: datafilename
= sys
.argv
[
1
]
for s
in sys
.argv
[
2
:
]
:
if s
.isdigit
(
)
==
False
and\ s
.find
(
'.'
)
<
0
: printf
(
"meterrec datafile ch1 ch2 ..."
) exit
(
)
if s
.isdigit
(
)
==
True
:
if
not
int
(s
)
in datachannel
: datachannel
.append
(
int
(s
)
) waitchannel
.append
(
0
)
else
: waitchannel
[datachannel
.index
(
int
(s
)
)
]
=
1
else
: sc
= s
.split
(
'.'
)
if
not
int
(sc
[
0
]
)
in datachannel
: decimaldim
[
len
(datachannel
)
]
=
int
(sc
[
1
]
) datachannel
.append
(
int
(sc
[
0
]
)
) waitchannel
.append
(
0
)
else
: waitchannel
[datachannel
.index
(sc
[
0
]
)
]
=
1
if
len
(datachannel
)
==
0
: printf
(
"meterrec datafile ch1 ch2 ..."
) exit
(
) workmode
=
1
#
else
:
if sys
.argv
[
1
]
.isdigit
(
)
: meterid
=
int
(sys
.argv
[
1
]
)
elif sys
.argv
[
1
]
.find
(
'.'
)
>=
0
: sc
= sys
.argv
[
1
]
.split
(
'.'
) meterid
=
int
(sc
[
0
]
) decimaldim
=
[
int
(sc
[
1
]
)
]
*
32
if
len
(sys
.argv
)
>
2
:
if sys
.argv
[
2
]
.isdigit
(
)
:
# decimalnum = int(sys.argv[2]) dn
=
int
(sys
.argv
[
2
]
) decimaldim
=
[dn
]
*
32 tablesection
= sys
.argv
[
3
: