CN215767169U

CN215767169U - Environment temperature and humidity acquisition device

Info

Publication number: CN215767169U
Application number: CN202121710736.XU
Authority: CN
Inventors: 钱立飞; 苏京华
Original assignee: Hefei Junmo Intelligent Technology Co ltd
Current assignee: Hefei Junmo Intelligent Technology Co ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-02-08
Anticipated expiration: 2031-07-23

Abstract

The utility model relates to an environment temperature and humidity acquisition device, which comprises a main control module, a sensor module and a communication module, wherein the sensor module and the communication module are respectively in communication connection with the main control module; the external circuit of the utility model uses few discrete devices, the reliability of the device is high, the selected temperature and humidity sensor has high measurement accuracy, small volume, good stability and low price, wherein, the C16 and C17 capacitors absorb interference signals, thus greatly improving the stability of 485 communication.

Description

Environment temperature and humidity acquisition device

Technical Field

The utility model relates to the technical field of temperature and humidity acquisition, in particular to an environment temperature and humidity acquisition device.

Background

Temperature and humidity sensors are widely applied to the aspects of industry, agriculture, meteorology, medical treatment, daily life and the like, and particularly, along with the development of scientific technology, the temperature and humidity detection and control are more and more emphasized by people and a large amount of research and development work is carried out. Generally, the ideal temperature and humidity sensor has the characteristic requirements of being suitable for being used in a wide temperature and humidity range and having high measurement accuracy; the service life is long, and the stability is good; the response speed is high, the temperature-humidity hysteresis difference is small, and the reproducibility is good; the sensitivity is high, the line shape is good, and the temperature coefficient is small; the manufacturing process is simple, the batch production is easy, the conversion circuit is simple, and the cost is low; corrosion resistance, low temperature resistance, high temperature resistance and the like. The traditional temperature and humidity sensor is large in size and not low in price, so that the finished product of the prepared environment temperature and humidity acquisition is heavy and the cost performance is not high.

SUMMERY OF THE UTILITY MODEL

The environment temperature and humidity acquisition device provided by the utility model has the advantages of small volume, high stability and low cost, and can be used for popularization.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an environment temperature and humidity acquisition device comprises three modules, namely a main control module, a sensor module and a communication module. When a main control chip of the main control module receives a communication command for acquiring temperature and humidity, the main control chip sends a corresponding command to the temperature and humidity sensor module and receives data returned by the temperature and humidity sensor module, and the main control chip converts the acquired data into a proper temperature and humidity data form according to a certain coding rule and sends the temperature and humidity data out through the communication module. When the temperature and humidity acquisition device does not work, the system is in a dormant state to save energy consumption.

The main control module adopts a main control chip HC32F030E8PA, a pin 4 of the main control chip HC32F030E8PA is connected with one end of a crystal oscillator Y1 and one end of a capacitor C1, a pin 5 is connected with the other end of the crystal oscillator Y1 and one end of a capacitor C2, and the other end of the capacitor C1 and the other end of the capacitor C2 are grounded together; one end of the resistor R1 is connected with 3.3V, the other end of the resistor R1 is connected with the 6 th pin of the main control chip HC32F030E8PA and one end of the capacitor C3, and the other end of the capacitor C3 is grounded; one ends of capacitors C6 and C7 are connected in parallel and then connected with one end of an inductor L1, the other end of L1 is connected with the 7 th pin of HC32F030E8PA, and the other ends of capacitors C6 and C7 are connected in parallel and then grounded.

Furthermore, the sensor module consists of an SHT30, resistors R5, R6 and a capacitor C4, wherein the C4 plays a role in filtering, the R5 and the R6 play a role in pulling up, and the 1 st, 2 nd, 3 th and 4 th pins of the SHT30 are respectively connected with the 25 th, 23 th, 22 th and 24 th pins of the main control chip;

one ends of the resistors R5 and R6 are connected in parallel and then connected with 3.3V, the other end of R5 is connected with the 4 th pin of SHT30, and the other end of R6 is connected with the 1 st pin of SHT 30; one end of the C4 is connected to the 5 th pin of SHT30 and the 5 th pin of SHT30 is connected to 3.3V, and the other end is grounded, i.e. the 8 th pin of SHT30 is grounded.

Furthermore, the communication module consists of a connector JP1, capacitors C15, C16, C17, resistors R25, R26 and a chip MAX3485, wherein the resistor R25 plays a pull-down role, the resistor R26 plays a pull-up role, the C15 plays a filtering role, and the C16 and the C17 play a role in preventing signal crosstalk;

pins

1, 2 and 4 of the chip MAX3485 are respectively connected with

pins

11, 3 and 10 of the main control chip;

one end of the capacitor C15 is connected to the 8 th pin of MAX3485, the 8 th pin of MAX3485 is connected to 3.3V, and the other end is grounded; one end of the resistor R25 and one end of the capacitor C16 are connected in parallel and then connected with the 7 th pin of MAX3485, and the other end of the resistor R25 and the other end of the capacitor C16 are respectively grounded; one end of the resistor R26 and one end of the capacitor C17 are connected in parallel and then connected with the 6 th pin of the MAX3485, and the other ends of the resistor R26 and the capacitor C17 are respectively connected with 3.3V.

According to the technical scheme, the environment temperature and humidity acquisition device is simple in structure, stable and reliable in operation, low in energy consumption and low in cost during operation, and can effectively promote environmental protection, energy conservation and emission reduction, and the temperature and humidity data are stably and reliably acquired by the temperature and humidity acquisition device.

Specifically, the advantages of the utility model are as follows:

1) the selected temperature and humidity sensor has high measurement precision, small volume, good stability and low price

2) The discrete devices used by the external circuit are few, and the reliability of the device is high;

3) the C16 and C17 capacitors absorb interference signals, so that the stability of 485 communication is greatly improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a circuit diagram of a master control module according to the present invention;

FIG. 3 is a circuit diagram of a sensor module of the present invention;

fig. 4 is a circuit diagram of a communication module according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

As shown in fig. 1, the ambient temperature and humidity acquisition apparatus according to this embodiment includes three modules, namely a main control module, a sensor module, and a communication module; when the main control chip of the main control module receives a communication command for acquiring temperature and humidity, the main control chip sends a corresponding command to the temperature and humidity sensor module and receives data returned by the temperature and humidity sensor module, the main control chip converts the acquired data into a data form of proper temperature and humidity according to a certain coding rule, and sends the temperature and humidity data out through the communication module. When the temperature and humidity acquisition device does not work, the system is in a dormant state to save energy consumption.

The following are specifically described:

as shown in fig. 2, a monolithic computer HC32F030E8PA of bulk semiconductor is used as the main control chip of the main control module, and the monolithic computer mainly functions in the main control module: 1) the communication module is connected with the communication module through

pins

3, 10 and 11(PC15, PA02 and PA03), the pin 3 is used for controlling the communication direction of data, when the pin is at a high level, the main control chip sends data to the chip MAX3485, and when the pin is at a low level, the main control chip receives the data sent by the MAX 3485; the 10 th pin and the 11 th pin are serial port communication pins of TTL level, and carry out mutual sending and receiving of data with the communication module. 2) The 22 nd pin is connected with the alarm pins of the sensor module, and the 22 nd pin, the 23 rd pin, the 24 th pin and the 25 th pin (PA10, PA11, PA12 and PA13) are connected with the sensor module, and when the alarm state is met, the alarm pin is changed into high level, otherwise, the alarm pin is changed into low level; the 23 rd pin is connected with an IIC address selection pin of the sensor module, and IIC addresses are different when high and low levels are changed; the 24 th pin and the 25 th pin are IIC interface pins of the single chip and are correspondingly connected with IIC interface pins of the sensor communication module. 3) The capacitors C1, C2 and the crystal oscillator Y1 form an oscillation system to provide clock beats for the singlechip HC32F030E8 PA; r1 and C3 constitute the reset circuit of the single chip; c6, C7 and L1 are filter circuits of the power supply of the single chip microcomputer.

Specifically, the 4 th pin of the HC32F030E8PA is connected with one end of the crystal oscillator Y1 and one end of the capacitor C1, the 5 th pin is connected with the other end of the crystal oscillator Y1 and one end of the capacitor C2, and the other end of the capacitor C1 and the other end of the capacitor C2 are commonly grounded; one end of the resistor R1 is connected with 3.3V, the other end of the resistor R1 is connected with the 6 th pin of HC32F030E8PA and one end of the capacitor C3, and the other end of the capacitor C3 is grounded; one ends of capacitors C6 and C7 are connected in parallel and then connected with one end of an inductor L1, the other end of L1 is connected with the 7 th pin of HC32F030E8PA, and the other ends of capacitors C6 and C7 are connected in parallel and then grounded.

As shown in fig. 3, the sensor module is composed of an SHT30, resistors R5, R6 and a capacitor C4, wherein the C4 plays a role of filtering, the R5 and the R6 play a role of pulling up, and the 1 st, 2 nd, 3 th and 4 th pins of the SHT30 are respectively connected with the 25 th, 23 th, 22 th and 24 th pins of the main control chip. The SHT10 mainly detects the temperature and humidity of the environment and converts them into digital signals to be transmitted to the main control chip.

Specifically, one end of each of the resistors R5 and R6 is connected in parallel and then connected with 3.3V, the other end of R5 is connected with the 4 th pin of SHT30, and the other end of R6 is connected with the 1 st pin of SHT 30; one end of the C4 is connected to the 5 th pin of the SHT30 (the 5 th pin of the SHT30 is connected to 3.3V), and the other end is grounded (the 8 th pin of the SHT30 is grounded).

As shown in fig. 4, the communication module is composed of a connector JP1, capacitors C15, C16, C17, resistors R25, R26, and a chip MAX3485, wherein the resistor R25 plays a pull-down role, the resistor R26 plays a pull-up role, the resistor C15 plays a filtering role, and the resistors C16 and C17 play a role in preventing signal crosstalk.

Pins

1, 2 and 4 of the chip MAX3485 are connected to

pins

11, 3 and 10 of the main control chip, respectively, and the chip MAX3485 mainly performs level conversion.

Specifically, one end of the capacitor C15 is connected to the 8 th pin of the MAX3485 (the 8 th pin of the MAX3485 is connected to 3.3V), and the other end is grounded; one end of the resistor R25 and one end of the capacitor C16 are connected in parallel and then connected with the 7 th pin of MAX3485, and the other end of the resistor R25 and the other end of the capacitor C16 are respectively grounded; one end of the resistor R26 and one end of the capacitor C17 are connected in parallel and then connected with the 6 th pin of the MAX3485, and the other ends of the resistor R26 and the capacitor C17 are respectively connected with 3.3V.

In conclusion, the environment temperature and humidity acquisition device provided by the utility model has the advantages that the number of discrete devices used by an external circuit is small, the reliability of the device is high, the measurement accuracy of the selected temperature and humidity sensor is high, the size is small, the stability is good, and the price is low, wherein two capacitors C16 and C17 absorb interference signals, so that the stability of 485 communication is greatly improved.

Meanwhile, as the humidity of the agricultural planting field environment is high, the corrosion to electronic devices is high, the service life of the electronic devices can be shortened seriously, and the practical environment is considered in the manufacturing process of the sensor used in the embodiment, so that all the systems are particularly applied to the application and popularization of the agricultural planting industry.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An environment temperature and humidity acquisition device, which comprises a main control module, a sensor module and a communication module which are respectively in communication connection with the main control module, and is characterized in that,

when a main control chip of the main control module receives a communication command for acquiring temperature and humidity, the main control chip sends a corresponding command to the temperature and humidity sensor module and receives data returned by the temperature and humidity sensor module, converts the acquired data into a data form of set temperature and humidity according to a set coding rule and sends the temperature and humidity data out through the communication module;

2. The environment temperature and humidity acquisition device of claim 1, wherein:

the sensor module consists of an SHT30, resistors R5, R6 and a capacitor C4, wherein the C4 plays a role of filtering, the R5 and the R6 play a role of pulling up, and the 1 st, 2 nd, 3 th and 4 th pins of the SHT30 are respectively connected with the 25 th, 23 th, 22 th and 24 th pins of the main control chip;

3. The environment temperature and humidity acquisition device of claim 2, wherein:

the communication module consists of a connector JP1, capacitors C15, C16, C17, resistors R25, R26 and a chip MAX3485, wherein the resistor R25 plays a pull-down role, the resistor R26 plays a pull-up role, the C15 plays a filtering role, and the C16 and the C17 play a role in preventing signal crosstalk;

pins 1, 2 and 4 of the chip MAX3485 are respectively connected with pins 11, 3 and 10 of the main control chip;

4. The environment temperature and humidity acquisition device of claim 3, wherein:

the main control chip HC32F030E8PA is connected with the communication module through pins 3, 10 and 11, the pin 3 is the communication direction of control data, when the pin is at high level, the main control chip sends data to the chip MAX3485, and when the pin is at low level, the main control chip receives the data sent by the MAX 3485; the 10 th pin and the 11 th pin are serial port communication pins of TTL level, and carry out mutual sending and receiving of data with the communication module.

5. The environment temperature and humidity acquisition device of claim 4, wherein:

the main control chip HC32F030E8PA is connected with the sensor module through pins 22, 23, 24 and 25, the 22 nd pin is connected with an alarm pin of the sensor module, and when the alarm state is satisfied, the alarm pin is changed into a high level, otherwise, the alarm pin is changed into a low level; the 23 rd pin is connected with an IIC address selection pin of the sensor module, and IIC addresses are different when high and low levels are changed; the 24 th pin and the 25 th pin are IIC interface pins of the single chip and are correspondingly connected with IIC interface pins of the sensor communication module.