CN203595551U - Short-distance wireless infrared multipath temperature-collecting system for grain depot - Google Patents

Abstract

The utility model discloses a short-distance wireless infrared multi-channel temperature acquisition system for a grain depot, which comprises a temperature acquisition end and a temperature data receiving end. The temperature data acquisition end consists of a power supply circuit module, a multi-channel temperature acquisition circuit module, a reset circuit module, The wireless transmitting module is composed of a single-chip microcomputer main control chip; the temperature data receiving end is composed of a power supply circuit module, a liquid crystal display module, a reset circuit module, a keyboard module, an alarm circuit module, a wireless receiving module and a single-chip microcomputer. The utility model adopts a plurality of infrared temperature sensors to collect temperature data at various points in the grain depot, can quickly and conveniently measure the real surface temperature of non-contact objects, can timely and correctly reflect the local grain temperature changes in the grain depot, and effectively avoids grain chains mildew, which ensures the safe storage of grain in the grain depot, adopts the wireless data transmission module to avoid complicated cable wiring, and has the characteristics of high communication rate and low power consumption in standby mode.

Description

A short-distance wireless infrared multi-channel temperature acquisition system for a grain depot

technical field

The utility model relates to a temperature acquisition system, in particular to a short-distance wireless infrared multi-channel temperature acquisition system for a grain depot. the

Background technique

Temperature measurement plays an important role in industrial and agricultural production and people's daily life, such as heating detection in urban residential areas, temperature detection in large temperature warehouses, industrial production measurement and control, and agricultural production temperature measurement and control, etc. The multi-point temperature measurement system can detect, display and store the temperature of multiple working points, which brings great convenience to production and life. The traditional temperature measurement and control system is to transmit the measured temperature data to the monitoring room or the upper PC by cable. Although the wired transmission has certain advantages in terms of transmission speed and operational reliability, it is difficult to wire the wiring when the environment is harsh. Moreover, it is inconvenient to move the location. For example, it is often necessary to change the test location in a granary or a greenhouse, and the wired wiring will also appear to be troublesome. The wireless transmission method can well solve the problem of wired transmission. The short-distance wireless multi-channel temperature acquisition system measures the temperature of multiple observation points through the temperature sensor, and then transmits and receives the measurement data through the wireless transmission module. It is suitable for multi-point temperature measurement of grain depots and greenhouses and industrial production measurement and control, etc. It is also suitable for occasions where there are serious hazards to human health, such as high radiation areas and high infection areas.

In the grain depot, the existing short-distance wireless multi-channel temperature acquisition system generally uses a contact digital temperature sensor as its temperature acquisition tool, so it must be fully in contact with the grain to measure its real temperature, then when taking out the grain or placing new grain, All these sensors need to be taken out, and the temperature sensors should be replaced after the grain is transferred, which is time-consuming and cumbersome. Therefore, people generally arrange the temperature sensors near the maximum area where the grain can be stacked in the grain depot, so that the temperature sensors must be separated from each other. Only a certain distance of grain can facilitate the transfer of grain, so the contact temperature sensor can only measure the air temperature near it, but cannot reflect the real temperature of local grain in time and correctly. The temperature control at each point of the grain depot has a great impact on the safe storage of grain. If the monitoring system cannot timely and correctly reflect the phenomenon of sudden rise in local grain temperature, it will inevitably cause mildew of the grain, and then cause a chain reaction, resulting in unsafe conditions. recovered losses. Therefore, it is very necessary to design a short-distance wireless multi-channel non-contact temperature acquisition system in grain depots.

Utility model content

In order to solve the above problems, the utility model discloses a short-distance wireless infrared multi-channel temperature acquisition system for a grain depot.

In order to achieve the above purpose, the utility model provides the following technical solutions: a short-distance wireless infrared multi-channel temperature acquisition system for grain depots, including a temperature acquisition end and a temperature data receiving end, and the temperature data acquisition end consists of a power circuit module, It consists of a multi-channel temperature acquisition circuit module, a reset circuit module, a wireless transmission module and a single-chip microcomputer main control chip. The acquisition circuit module signal is sent to the wireless transmitting module through the single-chip microcomputer main control chip; the temperature data receiving end is composed of a power supply circuit module, a liquid crystal display module, a reset circuit module, a keyboard module, an alarm circuit module, a wireless receiving module and a single-chip microcomputer. The circuit modules supply power to the single-chip microcomputer, the liquid crystal display circuit and the wireless receiving module respectively, and the liquid crystal display module, the reset circuit module, the keyboard module, the alarm circuit module and the wireless receiving module are connected to the single-chip microcomputer respectively.

As an improvement of the utility model, the multi-channel temperature acquisition circuit module adopts a non-contact temperature measuring sensor.

As an improvement of the utility model, the non-contact temperature sensor is an infrared temperature sensor TN9.

As an improvement of the utility model, the wireless transmitting module and the wireless receiving module both adopt nRF24L01 chip.

As an improvement of the utility model, the model of the single-chip microcomputer chip is STC89C52.

The beneficial effects of the utility model:

The utility model adopts a plurality of infrared temperature sensors to collect temperature data at various points in the grain depot, and can quickly and conveniently measure the real surface temperature of the non-contact object, so it can timely and correctly reflect the temperature change of the local grain in the grain depot, and effectively avoid the temperature change of the grain. Chain mildew ensures the safe storage of grain in the grain depot, and measures the temperature changes of grain at various points through non-contact methods, which will not affect the normal transfer of grain in the grain depot. The system uses the nRF24L01 wireless data transmission module to avoid complicated cable wiring, and has the characteristics of high communication rate and low power consumption in standby mode. When the temperature collection task is completed, the system can automatically enter the sleep state to save power consumption. Wait for the start of the next temperature data acquisition task.

Description of drawings

Fig. 1 is a system structure block diagram of the present utility model;

Fig. 2 is the circuit diagram of the temperature data acquisition terminal of the present utility model;

Fig. 3 is a circuit diagram of the temperature data receiving end of the present invention.

Detailed ways

The technical solutions provided by the utility model will be described in detail below in conjunction with specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the utility model and not to limit the scope of the utility model.

Fig. 1 is a structural block diagram of a short-distance wireless infrared multi-channel temperature acquisition system for a grain depot of the present invention, including a temperature acquisition end and a temperature data receiving end, and the temperature data acquisition end is composed of a power supply circuit module and a multi-channel temperature acquisition The circuit module, reset circuit module, wireless transmission module and single-chip microcomputer main control chip are composed. The power supply circuit module is connected with the multi-channel temperature acquisition circuit module and the single-chip microcomputer main control chip to supply power for it. The multi-channel temperature acquisition circuit module signal The main control chip of the single-chip microcomputer is sent into the wireless transmitting module; the temperature data receiving end is composed of a power circuit module, a liquid crystal display module, a reset circuit module, a keyboard module, an alarm circuit module, a wireless receiving module and a single-chip microcomputer, and the power circuit modules are respectively The single-chip microcomputer, liquid crystal display circuit and wireless receiving module supply power, and the described liquid crystal display module, reset circuit module, keyboard module, alarm circuit module and wireless receiving module are respectively connected with the described single-chip microcomputer.

Fig. 2 is the circuit diagram of the temperature data acquisition end of the utility model, the single-chip microcomputer chip adopts STC89C52, and the multi-channel temperature acquisition circuit module adopts 4 non-contact infrared temperature sensor TN9 circuits, TN91-TN93. The wireless transmitting module adopts nRF24L01 chip. The power supply circuit uses a power adapter to convert the mains power into 5V DC to supply power to the single-chip microcomputer STC89C52 and the infrared temperature sensor TN9. Since the power supply voltage of the nRF24l01 chip is between 1.9V and 3.6V, a 3.3V output voltage regulator circuit is designed. The 5V voltage outputs a stable 3.3V voltage through the three-terminal regulator AMS1117-3.3. The single-chip microcomputer control module circuit is composed of a clock circuit and a reset circuit of a single-chip STC89C5. When the microcontroller is powered on, the oscillator will always work and generate a continuous oscillation clock. The reset circuit is automatically reset when power on. When the crystal oscillator is working, the RST pin will continue to be high for 2 machine cycles to reset the microcontroller.

The non-contact infrared temperature sensor TN9 used in this system is an integrated infrared detector with a linear processing circuit and a temperature compensation circuit inside. Its measuring distance is about 30 meters and the response time is about 0.5 seconds. It has The SPI interface can facilitate data transmission with the microcontroller, so it is very suitable for non-contact temperature measurement at various points in the grain depot. The temperature acquisition circuit uses four infrared temperature sensors TN9, each TN9 sensor scans the measured local grain through the infrared temperature sensor, and transmits the corresponding infrared radiation data to the microcontroller through pins 2 and 3, and pin 5 It is the start signal pin of the temperature measurement module TN9, which is active at low level.

nRF24L01 is a wireless transceiver chip working in the 2.4~2.5GHz frequency band. It integrates a frequency generator, an enhanced SchockBurstTM mode controller, a power amplifier, a crystal oscillator, a modulator, a demodulator, etc., and its integration level High, output power, channel selection and protocol settings can be set through the SPI interface. The pins CE, MOSI, MISO, CSN, SCK, and IRQ of the wireless transceiver nRF24L01 are respectively connected to the ordinary IO ports of the main control chip STC89C52, through which the SPI timing is simulated through these ordinary IO ports, so as to control the connection between the MCU and the wireless transceiver nRF24L01 module. The communication of the temperature data among them, and transmit the temperature data to the upper computer through the wireless channel.

Fig. 3 is the circuit diagram of the temperature data receiving end of the present invention, the single chip microcomputer adopts STC89C52, the wireless receiving module circuit adopts nRF24L01 chip, the liquid crystal display circuit adopts LCD12864 liquid crystal display, the alarm circuit adopts buzzer to carry out the alarm, keyboard circuit and power supply circuit etc. composition. The power supply circuit uses a power adapter to convert the mains power into 5V DC to supply power to the single-chip microcomputer STC89C52, LCD display and buzzer, etc., and the output voltage regulator circuit of 3.3V supplies power to the wireless transceiver nRF24L01.

The circuit uses the wireless transceiver nRF24L01 to receive the temperature data sent by the temperature data acquisition terminal. The pins CE, MOSI, MISO, CSN, SCK, and IRQ of the nRF24L01 are respectively connected to the ordinary IO ports of the main control chip STC89C52. Through these ordinary The IO port is used to simulate the SPI timing, so as to control the wireless transceiver nRF24L01 to transmit the temperature data to the single-chip microcomputer. After being processed by the single-chip microcomputer STC89C52, the name of each measurement point and its temperature will be displayed in real time on the LCD12864 liquid crystal display. If the temperature is too high or too high Low to start the buzzer alarm circuit work. The temperature alarm upper and lower limits of the 4 measurement points can be set by 4 buttons, so as to better control the ambient temperature. The 4 buttons K1, K2, K3 and K4 are respectively connected to the P3.4, P3.5, P3.6 and P3.7 ports of the single chip microcomputer. To switch the upper or lower limit of the set temperature, each press of the K3 and K4 keys represents the operation of adding 1°C or subtracting 1°C to the upper or lower limit of the set temperature respectively.

The utility model adopts a plurality of infrared temperature sensors to collect temperature data at various points in the grain depot, and can quickly and conveniently measure the real surface temperature of the non-contact object, so it can timely and correctly reflect the temperature change of the local grain in the grain depot, and effectively avoid the temperature change of the grain. Chain mildew ensures the safe storage of grain in the grain depot, and measures the temperature changes of grain at various points through non-contact methods, which will not affect the normal transfer of grain in the grain depot. The system uses the nRF24L01 wireless data transmission module to avoid complicated cable wiring, and has the characteristics of high communication rate and low power consumption in standby mode. When the temperature collection task is completed, the system can automatically enter the sleep state to save power consumption. Wait for the start of the next temperature data acquisition task.

The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims (5)

1. A short-distance wireless infrared multi-channel temperature acquisition system for a grain depot, characterized in that: it comprises a temperature data acquisition end and a temperature data receiving end, and the temperature data acquisition end is composed of a power supply circuit module and a multi-channel temperature acquisition circuit module , a reset circuit module, a wireless transmission module and a single-chip microcomputer main control chip. The power supply circuit module is connected to the multi-channel temperature acquisition circuit module and the single-chip microcomputer main control chip to supply power for it. The signal of the multi-channel temperature acquisition circuit module is passed through the single-chip microcomputer. Main control chip is sent into wireless transmitting module; Described temperature data receiving end is made up of power circuit module, liquid crystal display module, reset circuit module, keyboard module, alarm circuit module, wireless receiving module and single-chip microcomputer, and power circuit module is respectively single-chip microcomputer, The liquid crystal display circuit and the wireless receiving module are powered, and the liquid crystal display module, the reset circuit module, the keyboard module, the alarm circuit module, and the wireless receiving module are respectively connected with the single-chip microcomputer. 2. A short-distance wireless infrared multi-channel temperature acquisition system for a grain depot according to claim 1, wherein the multi-channel temperature acquisition circuit module uses a non-contact temperature sensor. 3. A short-distance wireless infrared multi-channel temperature acquisition system for a grain depot according to claim 2, characterized in that: said non-contact temperature sensor is an infrared temperature sensor TN9. 4. A short-distance wireless infrared multi-channel temperature acquisition system for a grain depot according to claim 1, characterized in that: said wireless transmitting module and wireless receiving module both use nRF24L01 chips. 5. A short-distance wireless infrared multi-channel temperature acquisition system for a grain depot according to claim 1, characterized in that: the model of the single-chip microcomputer chip is STC89C52.

Images