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Measurement and control system for temperature, humidity and illuminance

A technology of measurement and control system and illuminance, which is applied in the direction of control/regulation system, non-electric variable control, and simultaneous control of multiple variables, etc. It can solve problems such as large visual error, inconvenient field operation, and complicated wiring installation

Active Publication Date: 2013-02-13
江苏银松谷农业投资发展有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

Due to the large visual error, some use handheld measuring equipment for timing or irregular measurement, but a problem that requires continuous measurement of temperature, light, and humidity in the field day and night, there are many inconveniences in manual measurement, and an intelligent measurement and control system must be formed. However, it is very complicated to install because of the need for communication lines, which is not convenient for field operation.

Method used

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  • Measurement and control system for temperature, humidity and illuminance

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Embodiment Construction

[0016] The hardware of this embodiment is based on the 51 series single-chip microcomputer as the core, and the circuit used for cycle detection detects the cycle zero-crossing signal. This series of single-chip microcomputer has its own asynchronous communication port. In order to increase the communication distance, the SN75176 chip is connected to the communication interface circuit to convert it into a 485 bus. Optocoupler TIL117 is also used for isolation. At the same time, the main controller 1 can also communicate with the PC through the RS485 bus.

[0017] The main controller 1 is composed of an electronic switch 01, a power supply 02, a single-chip microcomputer 03, a keyboard display 04, a memory 05, a cycle detection 06, a communication interface circuit 07 and a communication switch 08, wherein the communication switch 08 is an electronic switch for communication, and the single-chip microcomputer Adopt AT89C52. The main controller 1 is used for sending address s...

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Abstract

The invention relates to a measurement and control system for the temperature, the humidity and the illuminance, particularly to measurement and control of the temperature, the humidity and the illuminance for crop greenhouses. The system comprises a plurality of detection control points and a master controller, and power supply and communication are achieved through a public power line. The measurement and control system is convenient to install and safe in field environments, and integrated management of parameter detection and control for microenvironments of crop greenhouses in field can be achieved.

Description

(1) Technical field: [0001] The present invention relates to the detection and control of temperature, humidity and illuminance, in particular to a method for measuring and controlling the temperature, humidity and illuminance in greenhouses for crops, which includes multiple detection control points and a main controller, and supplies power and communicates through a common power line. [0002] (2) Background technology: [0003] Temperature, humidity, and light intensity are important parameters for crop growth. All green plants must be in the sun to perform photosynthesis. The increase in plant weight is closely related to light intensity. According to the different degrees of light demand of plants, in order to successfully complete the growth and development of agricultural crops, it is necessary to have a certain accumulation of material and energy base and an external environment suitable for crop growth, and the temperature, humidity, illuminance and other factors in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D27/02
Inventor 张金木
Owner 江苏银松谷农业投资发展有限公司