CN104729576A

CN104729576A - Temperature and humidity transmitter

Info

Publication number: CN104729576A
Application number: CN201310720046.6A
Authority: CN
Inventors: 李猛; 陈高丽; 王昆; 武海; 刘刚
Original assignee: Tianjin University of Technology
Current assignee: Tianjin University of Technology
Priority date: 2013-12-19
Filing date: 2013-12-19
Publication date: 2015-06-24

Abstract

The invention provides a temperature and humidity transmitter. The embedded type technology and the sensor technology are adopted for reading environment temperature and humidity information from a digital temperature and humidity sensor, converting the information into corresponding analog voltage and outputting the temperature and humidity information through serial port communication. The temperature and the humidity transmitter comprises a main control module (1), a temperature and humidity sensor module (2), a D/A conversion module (3), a serial port communication module (4), a liquid crystal display module (5) and a power module (6). A new-generation embedded processor STM32F103VE is adopted for serving as a main control chip and combined with a temperature and humidity sensor and a D/A conversion circuit to complete the function of converting digital value temperature and humidity signals into analog voltage signals and the display function, and the temperature and humidity transmitter has the advantages of being stable in performance, simple in structure and low in cost, and has certain application and popularization value.

Description

A kind of humiture transducer

Technical field

The present invention relates to a kind of humiture transducer, adopt flush bonding processor STM32F103VE of new generation as control core specifically, in conjunction with Temperature Humidity Sensor, by the design of soft and hardware, jointly complete the detection of humiture information and the output of analog voltage in environment.

Background technology

At present, humiture collection with to detect be agricultural science and technology, scientific experiment, industry in manufacturing the most generally, the item controlled of most typical meaning.Modern humiture collection technology low management from the beginning, low-level, monitoring of environmental condition difference etc., become the production of the scale of modern installations horticulture and modern greenhouse, specialization, hi-tech and robotization.Humiture transducer adopts high-quality digital integration sensor to pop one's head in, be equipped with reliable digitized processing circuit, thus by environment in temperature and relative humidity convert the simulating signal of the standard corresponded to, 4-20mA or 0-5V, reliably can carry out control of centralizing and scattering with master system etc.It has that volume is little, lightweight, broad quantum, precision are high and fast response time and the feature such as long-term working stability is good, makes it be widely used in the various fields needing to measure the humiture in air and control such as goods and materials storage, Heating,Ventilating and Air Conditioning (HVAC) such as meteorology, national defence, scientific research, post and telecommunications, chemical industry, environmental protection, medicine, hotel, grain.

A kind of humiture transducer of the present invention, in conjunction with embedded technology, sensor technology, completes the analog signal output of humiture information jointly, has that cost is low, performance good, advantage simple to operate, has certain market popularization value.

Summary of the invention

Technical matters to be solved by this invention is, provide a kind of with low cost, structure simple, be easy to the humiture transducer promoted.

The technical solution adopted in the present invention is: a kind of humiture transducer, has main control module (1), also comprises the Temperature Humidity Sensor module (2) be connected with main control module (1); The D/A modular converter (3) be connected with main control module (1); The serial communication modular (4) be connected with main control module (1); The LCD MODULE (5) be connected with main control module (1); The power module (6) be connected with main control module (1).

Described main control module (1) adopts flush bonding processor STM32F103VE chip of new generation, is the control core of whole humiture transducer, is responsible for the conversion to analog signals of the collection of humiture information in environment and digital quantity signal.

Described Temperature Humidity Sensor module (2) adopts digital temperature-humidity sensor DHT11, realizes the detection of humiture information in environment.

The D/A converter that described D/A modular converter (3) is carried by main control module (1) inside and auxiliary circuit form, for converting digital quantity humiture information to analog voltage.

Described serial communication modular (4) adopt MAX232 serial port level conversion chip, for converting Transistor-Transistor Logic level signal to RS232 level signal, realize the serial communication of data.

Described LCD MODULE (5) adopts 2.4 cun of LCDs, for showing the warm and humid angle value of the digital quantity collected, and the analog voltage converted.

Described power module (6) for providing system power supply, to make system worked well.

Accompanying drawing explanation

Fig. 1 is the entire block diagram of this humiture transducer;

Fig. 2 is the Temperature Humidity Sensor modular circuit schematic diagram of this humiture transducer;

Fig. 3 is the D/A modular converter circuit theory diagrams of this humiture transducer;

Fig. 4 is the serial communication modular circuit theory diagrams of this humiture transducer.

Embodiment

Below in conjunction with accompanying drawing and example, the invention will be further described.

A kind of humiture transducer of the present invention, flush bonding processor STM32F1203VE of new generation is adopted to be control core, the corresponding Temperature Humidity Sensor module (2) of peripheral collocation, D/A modular converter (3), serial communication modular (4), LCD MODULE (5) and power module (6), complete the detection of humiture information and the output of analog voltage in environment jointly.

As shown in Figure 1, a kind of humiture transducer of the present invention, has main control module (1), also comprises the Temperature Humidity Sensor module (2) be connected with main control module (1); The D/A modular converter (3) be connected with main control module (1); The serial communication modular (4) be connected with main control module (1); The LCD MODULE (5) be connected with main control module (1); The power module (6) be connected with main control module (1).。

As shown in Figure 2, Temperature Humidity Sensor module (2) of the present invention adopts digital temperature-humidity sensor DHT11, data transmission is carried out by unibus communication mode and main control module (1), its data pins DATA is connected with the PD3 interface of main control module (1), for the sample and transform of humiture information.

As shown in Figure 3, the D/A converter that D/A modular converter (3) of the present invention is carried by main control module (1) inside and auxiliary circuit form, auxiliary circuit is made up of 2 amplifier U1 and U2, the analog voltage converted outputs in auxiliary circuit by D/A output interface PA4 by main control module (1), carries out the amplification of signal.

As shown in Figure 4, serial communication modular of the present invention (4) adopts MAX232 serial port level conversion chip, converts RS232 level signal to for the Transistor-Transistor Logic level signal exported by main control module (1), and the serial communication realizing data exports.

Claims

1. a humiture transducer, has main control module (1), it is characterized in that, also comprises the Temperature Humidity Sensor module (2) be connected with main control module (1); The D/A modular converter (3) be connected with main control module (1); The serial communication modular (4) be connected with main control module (1); The LCD MODULE (5) be connected with main control module (1); The power module (6) be connected with main control module (1).

2. a kind of humiture transducer according to claim 1, is characterized in that: described Temperature Humidity Sensor module (2) adopts digital temperature-humidity sensor DHT11, realizes the detection of humiture information in environment.

3. a kind of humiture transducer according to claim 1, it is characterized in that: the D/A converter that described D/A modular converter (3) is carried by main control module (1) inside and auxiliary circuit form, for converting digital quantity humiture information to analog voltage.

4. a kind of humiture transducer according to claim 1, it is characterized in that: described serial communication modular (4) adopts MAX232 serial port level conversion chip, for converting Transistor-Transistor Logic level signal to RS232 level signal, realize the serial communication of data.