Basic ping monitor in PowerShell

Ping-Monitor-Summary.ps1

$lastDate = $null
$diff = $null

cat .\Ping-Monitor.log | select-string "timeout" | %{
    switch -regex ($_) {
        '(?<date>.*) timeout' {
            $date = [DateTime]::Parse($Matches.date)
            if ($lastDate) {
                $diff = $date - $lastDate
            }
            "$_ $diff"
            $lastDate = $date
        }
    }
}

Ping-Monitor.ps1

start-transcript -append Ping-Monitor.log

ping google.com -t | %{
    $datestr = get-date -format s
    switch -regex ($_) {
        'Reply from .* bytes=.* time=(?<time>.*)ms TTL=.*' { if ($Matches.time -as [int] -gt 30) { "$datestr $($Matches.time)" } }
        'timed out' { "$datestr timeout" }
    }
 }

 stop-transcript

Ping-Timeout-Monitor.ps1

$lastDate = $null
$diff = $null

ping google.com -t | %{
    $date = get-date
    switch -regex ($_) {
        'timed out' {
            if ($lastDate) {
                $diff = $date - $lastDate
            }
            echo "$(get-date -date $date -format s) timeout $diff"
            $lastDate = $date
        }
    }
 }