如何编写Delphi程序来控制CPU风扇速度并监控温度？

Question

我想用Delphi创建一个程序来控制我的电脑的风扇速度并监视温度。

这样做涉及哪些API调用？

是否有任何可以共享的良好代码示例？

Answer 1

您可以使用WMI访问风扇转速（以及其他统计信息，如温度）。在Delphi中使用WMI的一个很好的例子是Magenta Systems。

Answer 2

您可以使用WMI类德尔福Win32_TemperatureProbe和Win32_Fan， 必须导入微软WMIScripting 1.x版库使用成分 - >导入成分 - >导入类型库 - >下一步 - >“选择库” - >下一步 - >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.