Rain Detector
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From: Grant Edwards on 26 May 2006 14:20 On 2006-05-26, Roberto Waltman <usenet(a)rwaltman.net> wrote: > >>For final year project,I want to design a rain measurement >>device which can be read through parelle port of a PC. All >>ideas on this topic are cordially welcome. > > Please define more precisely what do you mean by "rain measurement". > Do you want just to (a) detect it is raining or (b) measure the amount > of precipitation? (b-1) Measure the total rainfall over a period of time (e.g. total inches the past 24 hours). (b-2) Measure the instantaneous rate of rainfall (inches/hour). -- Grant Edwards grante Yow! People humiliating at a salami! visi.com
From: Paul Keinanen on 26 May 2006 15:48 On Fri, 26 May 2006 18:20:56 -0000, Grant Edwards <grante(a)visi.com> wrote: >On 2006-05-26, Roberto Waltman <usenet(a)rwaltman.net> wrote: >> >>>For final year project,I want to design a rain measurement >>>device which can be read through parelle port of a PC. All >>>ideas on this topic are cordially welcome. >> >> Please define more precisely what do you mean by "rain measurement". >> Do you want just to (a) detect it is raining or (b) measure the amount >> of precipitation? > > (b-1) Measure the total rainfall over a period of time (e.g. > total inches the past 24 hours). > > (b-2) Measure the instantaneous rate of rainfall (inches/hour). In a cold climate, you should define how to handle snow and sleet and how to prevent the collected water from freezing at night. In a hot climate you have to consider about evaporation especially if the air becomes dry and windy after a shower. Paul
From: Leon on 27 May 2006 07:30 scilent-project wrote: > Hi > For final year project,I want to design a rain measurement device which > can be read through parelle port of a PC. > All ideas on this topic are cordially welcome. > > thanks in advance. An interesting technique is to count the impacts from raindrops in a given area, using a suitable transducer. It can be quite accurate, apparently. Leon
From: Grant Edwards on 27 May 2006 09:21 On 2006-05-27, Leon <leon.heller(a)bulldoghome.com> wrote: > > scilent-project wrote: >> Hi >> For final year project,I want to design a rain measurement device which >> can be read through parelle port of a PC. >> All ideas on this topic are cordially welcome. >> >> thanks in advance. > > An interesting technique is to count the impacts from raindrops in a > given area, using a suitable transducer. It can be quite accurate, > apparently. Do also have to measure the impacts to get an estimate of drop size? -- Grant Edwards grante Yow! .. Should I get at locked in the PRINCIPAL'S visi.com OFFICE today -- or have a VASECTOMY??
From: Leon on 27 May 2006 11:26
Grant Edwards wrote: > On 2006-05-27, Leon <leon.heller(a)bulldoghome.com> wrote: > > > > scilent-project wrote: > >> Hi > >> For final year project,I want to design a rain measurement device which > >> can be read through parelle port of a PC. > >> All ideas on this topic are cordially welcome. > >> > >> thanks in advance. > > > > An interesting technique is to count the impacts from raindrops in a > > given area, using a suitable transducer. It can be quite accurate, > > apparently. > > Do also have to measure the impacts to get an estimate of drop > size? I can't remember. It might be accurate enough if an average size could be calculated. Leon |