Data/hora: 13/06/2024 08:52:31

Biblioteca(s): | Embrapa Meio Norte / UEP-Parnaíba.
Data corrente: | 01/04/1993
Data da última atualização: | 01/04/1993
Autoria: | WHITE, J. W.; HAMILTON, J. H.
Título: | Irradiance and plant temperature monitor/controller.
Ano de publicação: | 1985
Fonte/Imprenta: | Computer Electronics Agriculture, v.1, n.1, p.95-103, 1985.
Idioma: | Inglês
Conteúdo: | An irradiace and plant temperatrue monitor/controller has been developed and is being for use in controlled environments and in commercial greenhouses. Photo synthetic photon flux density was monitored using a quantum sensor, while plant temperature  was monitored with and infrared thermometer. A microprocessor integrated the singals from each sensor and permitted a choice of priority control of high-intensity discharge (HID) lamps or infrared (IR) heaters for control of plant temperature. It also permits dimmining of HID lamps inversely proportional to natural irradicance. Effects of the monitor/controller changes on high-pressure sodium lamp output to  input ratio, lamp life and dimming response time will be illustrated. The effects of irradiance variations on leaf heating and cooling are presented.
Palavras-Chave: | Growing; Plant.
Thesagro: | Crescimento; Planta; Temperatura.
Thesaurus Nal: | temperature.
Categoria do assunto: | --
Registro original: | Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP)
Exemplares: | CPAMN-UEPP - (2411-1) - ADD - SP - -- - 91.04087 -  - 1991.04087 - DIS