1756-PB75
1756-PB75實際應(yīng)用舉例
由于SBE 37-SI MicroCAT溫鹽深傳感器所提供的RS232數(shù)據(jù)格式與常用的導航設(shè)備數(shù)據(jù)格式不同,不能直接與潛水器綜合導航顯示控制臺系統(tǒng)現(xiàn)連接進行數(shù)據(jù)交換。為了方便通信,本文作者在實際的工程應(yīng)用中設(shè)計了一個數(shù)據(jù)格式轉(zhuǎn)換電路板,電路的結(jié)構(gòu)如圖2所示。
圖2 SBE 37-SI MicroCAT數(shù)據(jù)格式轉(zhuǎn)換電路板的設(shè)計
在圖2中,通信控制單片機一方面負責接收數(shù)據(jù),將接收到表達海水的狀態(tài)參數(shù)的ASCII字符轉(zhuǎn)換成數(shù)字類型,對該數(shù)字類型進行判斷正負,把相應(yīng)的空格置換成零,再轉(zhuǎn)換為ASCII字符類型,添加上起始符$以及每個數(shù)據(jù)的頭字母(即T、C、P、D、S、V、R),算出$以后所有字符的代碼和,然后將代碼和標志及代碼和、回車符、換行符加上,最后通過RS232輸出到綜導顯控臺。另一方面,接收來自綜導顯控臺的命令,然后發(fā)送給SBE 37- SI MicroCAT溫鹽深傳感器,對傳感器的響應(yīng)完完全全地返回給綜導顯控臺。因此綜導顯控臺可以隨時改變溫鹽深傳感器的輸出數(shù)據(jù)、數(shù)據(jù)輸出的間隔時間以及他的狀態(tài),又可以接收到通用格式的數(shù)據(jù)。
1756-PB75
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