How to compare the time size of the PHPADOACCESS database and SQL statements

In the PHPADOACCESS database, how does SQL compare the time? Now we use PHP & nbsp; + & nbsp; ADO & nbsp; + & nbsp; ACCESS database to compare the Time field of ACCESS database with & nbsp; COleDateT php ado access database, how does SQL compare the time size?
Now we use PHP + ADO + ACCESS database to compare time problems

The Time field of the ACCESS database stores Time data in the COleDateTime format.
The following two lines of code write the "Time" field of the database during MFC programming:
COleDateTime ct = COleDateTime: GetCurrentTime ();
M_pRecordset_record-> PutCollect ("Time", _ variant_t (ct ));
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The following is the date filtering SQL statement that I want to achieve, but in fact there is a problem with writing sqlstr like this. php execution is wrong. I would like to ask how to write it correctly.
$ Sqlstr = "select * from record where NameStr = '$ sensor' and Time> '2017/15 '";
$ RsRecord1-> Open ($ sqlstr, $ conn1, 1, 1 );
------ Solution --------------------
$ Sqlstr = "select * from record where NameStr = '$ sensor' and Time >#2014-01-15 #";