近一段时间，应一研究生的要求帮忙做个采集温度和计算摩擦系数的数据采集系统，系统采用研华的PCI采集卡1710lL。在这方面研华的资料比较少，研究了几个晚上终于弄成了一个采集数据的程序。没有使用研华的控件。
首先是初始化通道，设置程序显示界面及曲线图初始化，导入研华驱动公共文件。
1 GainArray(0) = 0 2 GainArray(1) = 0 3 GainArray(2) = 0 4 GainArray(3) = 0 5 Call tabinit '初始化表格 6 For i = 1 To 60 7 cbotime.AddItem (i) 8 Next 9 Picture1.BackColor = QBColor(15) 10 Picture1.Scale (-5, 2000)-(6000, -2000) '定义坐标系 11 Picture1.DrawWidth = 2 12 Picture1.CurrentX = -2 13 Picture1.CurrentY = -1 14 Picture1.Print 0 15 Picture1.Line (0, 2000)-(0, -2000), QBColor(1) '画竖轴 16 Picture1.Line (-5, 0)-(6000, 0), QBColor(1) '画横轴 17 18 drawtype = 1 '初始绘制连续的曲线图 19 Mindata = 0: Maxdata = 3 '下限、上限温度报警初始值 20 21 baohuzhi(0).Text = Mindata '显示下限 22 baohuzhi(1).Text = Maxdata '上限温度值 23 'alarm1.FillColor = QBColor(10) '报警指示灯初始颜色 24 'alarm2.FillColor = QBColor(10) 25 num = 1 26 27 '－－－－－－－－－－－－－－－－多通道设置1－－－－－－－－－－－－－－－－－－－ 28 ErrCde = DRV_DeviceOpen(1, DriverHandle1) '打开模拟量输入端口 设备号0(为安装在系统中的板卡号000，001) 打开第0个采集卡 29 If (ErrCde <> 0) Then 30 DRV_GetErrorMessage ErrCde, szErrMsg 31 Response = MsgBox("通道1：" + szErrMsg, vbOKOnly, "Error!!") 32 Exit Sub 33 End If 34 35 ErrCde = DRV_DeviceOpen(1, DriverHandle2) '打开数字量输出端口 36 If (ErrCde <> 0) Then 37 DRV_GetErrorMessage ErrCde, szErrMsg 38 Response = MsgBox("通道1：" + szErrMsg, vbOKOnly, "Error!!") 39 Exit Sub 40 End If 41 '------------------- 42 With MAIConfig_T 43 .NumChan = 4 '4通道 44 .StartChan = 0 '从0 通道开始 45 .GainArray = DRV_GetAddress(GainArray(0)) 'Array(0, 0, 0,0) '各通道增益值（0为+－5V） 46 End With 47 ErrCde = DRV_MAIConfig(DriverHandle1, MAIConfig_T) 48 If (ErrCde <> 0) Then 49 DRV_GetErrorMessage ErrCde, szErrMsg 50 Response = MsgBox("多通道设置错误：" + szErrMsg, vbOKOnly, "Error!!") 51 Exit Sub 52 End If 53 54 MAIVoltageIn.NumChan = MAIConfig_T.NumChan 55 MAIVoltageIn.StartChan = MAIConfig_T.StartChan 56 MAIVoltageIn.GainArray = DRV_GetAddress(GainArray(0)) '得到值0 57 MAIVoltageIn.TrigMode = 0
使用单通道和多通道的初始化有点不同，本以为初始化多个单通道就能实现多通道的但是不行，获取的数据根本不是实际的数据。所以只能设置多通道的方法来获取数据。
画曲线子程序
1 '画连续曲线/间断散点图 2 Sub DrawCurve() 3 On Error GoTo hh 4 If num = 0 Or num = 1 Then Exit Sub 5 'Picture1.Cls 6 Picture1.DrawWidth = 1 7 8 '0黑，1蓝，2绿，3青，4红，5洋红，6黄，7白 9 10 gX0 = (num - 1) * 6: gX1 = num * 6 ' 11 wY0 = T_Data(num - 1) * 3: wY1 = T_Data(num) * 3 12 mY0 = M_Data(num - 1) * 3: mY1 = M_Data(num) * 3 13 Select Case drawtype 14 Case 1 15 16 Picture1.Line (gX0, wY0)-(gX1, wY1), QBColor(4) '温度值 17 18 Picture1.Line (gX0, mY0)-(gX1, mY1), QBColor(1) '摩擦值 19 20 Case 2 21 22 Picture1.PSet (gX1, wY1), QBColor(4) '温度描点 23 24 Picture1.PSet (gX1, mY1), QBColor(1) '温度描点 25 26 End Select 27 28 hh: Exit Sub 29 End Sub
采集数据使用一个定时器定时读取PCI上内存地址的数据。在界面上增加选择采集时间，时间越短，采样数据越准确，可根据采样率要求自行选择采集周期。使用一个Timer定时器。
1 Private Sub Tim_Reader_Timer() 2 Dim u As String 3 If num > 1000 Then 4 5 '到显示不下时先保存数据，然后重新画 6 If ChkSave.value = 1 Then 7 Tim_Reader.Enabled = False 8 '----------------- 9 Randomize 10 filesName = App.Path + "\DataSaves\" + Format(Now, "YYYYMMDDHHMMSS") & Int(Rnd(100) * 100) & ".txt" 11 If (fs.FileExists(filesName)) Then 12 '存在就另外随机创建文件 13 filesName = App.Path + "\DataSaves\" + Format(Now, "YYYYMMDDHHMMSS") & Int(Rnd(100) * 100) & ".txt" 14 fs.CreateTextFile (filesName) 15 Else 16 fs.CreateTextFile (filesName) 17 End If 18 F3 = FreeFile 19 Open filesName For Output As #F3 20 Print #F3, "压力值" & "," & "温度值" & "," & "摩擦系数", " & "; 高温度值; " " 21 For j = 1 To num - 1 22 Print #F3, F_Data(j) & "," & T_Data(j) & "," & M_Data(j), " & T1_Data(j)" 23 Next 24 Close #F3 25 26 Tim_Reader.Enabled = True 27 End If 28 29 Call renew 30 31 End If 32 'T_Data(1200) As Single ' 温度收集数据 33 'M_Data(1200) As Single '摩擦系数数据 34 'F_Data(1200) As Single '压力数据 35 '---------------------- 36 MAIVoltageIn.VoltageArray = DRV_GetAddress(volval(0)) 37 ErrCde = DRV_MAIVoltageIn(DriverHandle1, MAIVoltageIn) '获取多通道数据 38 If (ErrCde <> 0) Then 39 DRV_GetErrorMessage ErrCde, szErrMsg 40 Response = MsgBox("1：" + szErrMsg, vbOKOnly, "Error!!") 41 Exit Sub 42 End If 43 T_Data(num) = Val(volval(0)) ' (Val(voltage) - 1) * 50 '标度变换（温度值） 44 wendu(0).Text = Format$(T_Data(num), "0.0") 45 '---------------------- 46 MAIVoltageIn.VoltageArray = DRV_GetAddress(volval(0)) 47 ErrCde = DRV_MAIVoltageIn(DriverHandle1, MAIVoltageIn) '获取多通道数据 48 If (ErrCde <> 0) Then 49 DRV_GetErrorMessage ErrCde, szErrMsg 50 Response = MsgBox("2：" + szErrMsg, vbOKOnly, "Error!!") 51 Exit Sub 52 End If 53 M_Data(num) = Val(volval(1)) ' (Val(voltage_m) - 1) * 50 '标度变换（摩擦值） 54 mochaxishu(0).Text = Format$(M_Data(num), "0.0") 55 '--------------------------- 56 MAIVoltageIn.VoltageArray = DRV_GetAddress(volval(0)) 57 ErrCde = DRV_MAIVoltageIn(DriverHandle1, MAIVoltageIn) '获取多通道数据 58 If (ErrCde <> 0) Then 59 DRV_GetErrorMessage ErrCde, szErrMsg 60 Response = MsgBox("3：" + szErrMsg, vbOKOnly, "Error!!") 61 Exit Sub 62 End If 63 F_Data(num) = Val(volval(2)) ' (Val(voltage_f) - 1) * 50 '标度变换（压力值） 64 force.Text = Format$(F_Data(num), "0.0") 65 '---------------------- 66 MAIVoltageIn.VoltageArray = DRV_GetAddress(volval(0)) 67 ErrCde = DRV_MAIVoltageIn(DriverHandle1, MAIVoltageIn) '获取多通道数据 68 If (ErrCde <> 0) Then 69 DRV_GetErrorMessage ErrCde, szErrMsg 70 Response = MsgBox("3：" + szErrMsg, vbOKOnly, "Error!!") 71 Exit Sub 72 End If 73 T1_Data(num) = Val(volval(3)) ' (Val(voltage_f) - 1) * 50 '标度变换（压力值） 74 gaowen(4).Text = Format$(F_Data(num), "0.0") 75 '---------------------- 76 77 'ErrCde = DRV_AIVoltageIn(DriverHandle5, AIVoltageIn_F) '获取AI3通道数据(实型电压值) 78 'If (ErrCde <> 0) Then 79 'DRV_GetErrorMessage ErrCde, szErrMsg 80 'Response = MsgBox(szErrMsg, vbOKOnly, "Error!!") 81 'Exit Sub 82 'End If 83 'F_Data(num) = (Val(voltage_f) - 1) * 50 '标度变换（压力值） 84 'force.Text = Format$(F_Data(num), "0.0") 85 '---------------------- 86 msgrd_show.Row = num 87 msgrd_show.Col = 1 88 msgrd_show.CellAlignment = vbCenter 89 msgrd_show.Text = Now() 90 msgrd_show.Col = 2 91 msgrd_show.CellAlignment = vbCenter 92 msgrd_show.Text = T_Data(num) 'filedata(num - 2) 温度值 93 msgrd_show.Col = 3 94 msgrd_show.CellAlignment = vbCenter 95 msgrd_show.Text = M_Data(num) 'filedata(num - 1) 摩擦系数值 96 msgrd_show.Col = 4 97 msgrd_show.CellAlignment = vbCenter 98 msgrd_show.Text = T1_Data(num) 'filedata(num - 1) 摩擦系数值 99 100 101 'Call alarm '不做报警提示 102 Call Calculates '调用计算极值、平均值子程序 103 Call DrawCurve '调用绘图子程序 104 num = num + 1 105 End Sub
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