Question

我想使用Delphi创建一个程序来控制计算机的风扇速度并监控温度。

这样做涉及哪些API调用？

您可以分享哪些好的代码示例？

Answer 1

您可以使用WMI类Win32_TemperatureProbe和Win32_Fan，来自delphi，您必须使用Component-＆gt; Import Component-＆gt; Import type library-＆gt;导入 Microsoft WMIScripting V1.x Library > Next-＆gt;“选择库” - ＆gt; Next-＆gt ;将单位添加到项目 - >完成。

请参阅此代码。只是一个简单的例子。

program GetWMI_Info;

{$APPTYPE CONSOLE}

uses
  ActiveX,
  Variants,
  SysUtils,
  WbemScripting_TLB in '..\..\..\Documents\RAD Studio\5.0\Imports\WbemScripting_TLB.pas';

procedure ShowTemperatureInfo();
var
  WMIServices: ISWbemServices;
  Root       : ISWbemObjectSet;
  Item       : Variant;
  I          : Integer;
begin
 {
 http://msdn.microsoft.com/en-us/library/aa394493%28VS.85%29.aspx
 The Win32_TemperatureProbe  WMI class represents the properties of a temperature sensor (electronic thermometer).
 Most of the information that the Win32_TemperatureProbe WMI class provides comes from SMBIOS.
 Real-time readings for the CurrentReading property cannot be extracted from SMBIOS tables.
 For this reason, current implementations of WMI do not populate the CurrentReading property.
 The CurrentReading property's presence is reserved for future use.
 }

  Writeln('Temperature Info');
  Writeln('----------------');

  WMIServices := CoSWbemLocator.Create.ConnectServer('.', 'root\cimv2','', '', '', '', 0, nil);
  Root  := WMIServices.ExecQuery('Select * FROM Win32_TemperatureProbe','WQL', 0, nil);
  for I := 0 to Root.Count - 1 do
  begin
    Item := Root.ItemIndex(I);
      Writeln('Accuracy                        '+VarToStr(Item.Accuracy));
      Writeln('Availability                    '+VarToStr(Item.Availability));
      Writeln('Caption                         '+Item.Caption);
      Writeln('Config Manager Error Code       '+VarToStr(Item.ConfigManagerErrorCode));
      Writeln('Config Manager User Config      '+VarToStr(Item.ConfigManagerUserConfig));
      Writeln('Creation Class Name             '+VarToStr(Item.CreationClassName));
      Writeln('Current Reading                 '+VarToStr(Item.CurrentReading));
      Writeln('Description                     '+VarToStr(Item.Description));
      Writeln('Device ID                       '+VarToStr(Item.DeviceID));
      Writeln('Error Cleared                   '+VarToStr(Item.ErrorCleared ));
      Writeln('Error Description               '+VarToStr(Item.ErrorDescription));
      Writeln('Install Date                    '+VarToStr(Item.InstallDate));
      Writeln('Is Linear                       '+VarToStr(Item.IsLinear));
      Writeln('Last Error Code                 '+VarToStr(Item.LastErrorCode));
      Writeln('Lower Threshold Critical        '+VarToStr(Item.LowerThresholdCritical));
      Writeln('Lower Threshold Fatal           '+VarToStr(Item.LowerThresholdFatal));
      Writeln('Lower Threshold NonCritical     '+VarToStr(Item.LowerThresholdNonCritical));
      Writeln('Max Readable                    '+VarToStr(Item.MaxReadable));
      Writeln('Min Readable                    '+VarToStr(Item.MinReadable));
      Writeln('Name                            '+VarToStr(Item.Name));
      Writeln('Nominal Reading                 '+VarToStr(Item.NominalReading));
      Writeln('Normal Max                      '+VarToStr(Item.NormalMax));
      Writeln('Normal Min                      '+VarToStr(Item.NormalMin ));
      Writeln('PNP Device ID                   '+VarToStr(Item.PNPDeviceID));
      Writeln('Power Management Capabilities   '+VarToStr(Item.PowerManagementCapabilities));
      Writeln('Power Management Supported      '+VarToStr(Item.PowerManagementSupported));
      Writeln('Resolution                      '+VarToStr(Item.Resolution));
      Writeln('Status                          '+VarToStr(Item.Status));
      Writeln('Status Info                     '+VarToStr(Item.StatusInfo));
      Writeln('System Creation Class Name      '+VarToStr(Item.SystemCreationClassName));
      Writeln('System Name                     '+VarToStr(Item.SystemName));
      Writeln('Tolerance                       '+VarToStr(Item.Tolerance));
      Writeln('Upper Threshold Critical        '+VarToStr(Item.UpperThresholdCritical));
      Writeln('Upper Threshold Fatal           '+VarToStr(Item.UpperThresholdFatal));
      Writeln('Upper Threshold NonCritical     '+VarToStr(Item.UpperThresholdNonCritical));
      Writeln('');
  end;
end;

procedure  ShowCPUFanInfo();
var
  WMIServices: ISWbemServices;
  Root       : ISWbemObjectSet;
  Item       : Variant;
  I          : Integer;
begin
 {
  http://msdn.microsoft.com/en-us/library/aa394146%28VS.85%29.aspx
  The Win32_Fan WMI class represents the properties of a fan device in the computer system. For example, the CPU cooling fan.
 }
  Writeln('CPU FAN Info');
  Writeln('----------------');
  WMIServices := CoSWbemLocator.Create.ConnectServer('.', 'root\cimv2','', '', '', '', 0, nil);
  Root  := WMIServices.ExecQuery('Select * FROM Win32_Fan','WQL', 0, nil);
  for I := 0 to Root.Count - 1 do
  begin
    Item := Root.ItemIndex(I);

    Writeln('ActiveCooling                     '+VarToStr(Item.ActiveCooling));
    Writeln('Availability                      '+VarToStr(Item.Availability));
    Writeln('Caption                           '+VarToStr(Item.Caption));
    Writeln('Config Manager ErrorCode          '+VarToStr(Item.ConfigManagerErrorCode));
    Writeln('Config Manager UserConfig         '+VarToStr(Item.ConfigManagerUserConfig));
    Writeln('Creation ClassName                '+VarToStr(Item.CreationClassName));
    Writeln('Description                       '+VarToStr(Item.Description));
    Writeln('DesiredSpeed                      '+VarToStr(Item.DesiredSpeed));
    Writeln('DeviceID                          '+VarToStr(Item.DeviceID));
    Writeln('ErrorCleared                      '+VarToStr(Item.ErrorCleared));
    Writeln('ErrorDescription                  '+VarToStr(Item.ErrorDescription));
    Writeln('InstallDate                       '+VarToStr(Item.InstallDate));
    Writeln('LastErrorCode                     '+VarToStr(Item.LastErrorCode));
    Writeln('Name                              '+VarToStr(Item.Name));
    Writeln('PNPDeviceID                       '+VarToStr(Item.PNPDeviceID));
    Writeln('PowerManagement Capabilities      '+VarToStr(Item.PowerManagementCapabilities));
    Writeln('PowerManagement Supported         '+VarToStr(Item.PowerManagementSupported));
    Writeln('Status                            '+VarToStr(Item.Status));
    Writeln('StatusInfo                        '+VarToStr(Item.StatusInfo));
    Writeln('SystemCreation ClassName          '+VarToStr(Item.SystemCreationClassName));
    Writeln('SystemName                        '+VarToStr(Item.SystemName));
    Writeln('VariableSpeed                     '+VarToStr(Item.VariableSpeed));
    Writeln('');
  end;

End;


begin
  try
    CoInitialize(nil);
        ShowTemperatureInfo();
        ShowCPUFanInfo();
        Readln;
    CoUninitialize;
  except
    on E:Exception do
    Begin
        CoUninitialize;
        Writeln(E.Classname, ': ', E.Message);
        Readln;
    End;
  end;
end.

Answer 2

您可以使用WMI访问风扇速度（以及其他统计信息，如温度）。在Magenta Systems中可以找到在Delphi中使用WMI的一个很好的例子。

如何编写Delphi程序来控制CPU风扇速度并监控温度？

2 个答案: