MSK030C-0900-NN-M1-UG0-NNNN模块现货

MSK030C-0900-NN-M1-UG0-NNNN

对于冷库温度控制系统，有以下三种方案：1.FPGA的选择
可编程逻辑器件，通过使用FPGA器件可以大大缩短系统的设计时间
并使产品更快地进入市场，进而提高产品的竞争力。2.
PLC可编程逻辑器件，以PLC为控制系统，其特点是处理
信号时间短，进度快，及时。所有I/O输入和输出信号为：
选用光电隔离，具有良好的自识别功能。3 STC STC89S52
微控制器，其特点是低功耗、高性能、价格低廉
并且与传统的8051微控制器兼容。使用该设计方案，
考虑到实用性和价格，芯片和设备是通用组件，价格便宜
对于整个系统的建设，该系统具有良好的应用前景。
本设计以STC89S52单片机为主脑，DS18B20温度传感器范围-50度
到120摄氏度时，测量的温度被发送到STC89S52单片机，MCU中的温度
显示电路实时显示，系统恢复为1602 LCD模块显示。这
系统不仅可以显示温度，还可以用于设定特定的温度值，
测量温度实时监控，当温度高于
设定温度后，会立即使相应的温度设备工作迅速调整
冷库温度，以达到恒温状态，然后控制系统
运行稳定，控制自动化。
机电控制技术和运输国际会议（ICECTT 2015）©2015。作者-由亚特兰蒂斯出版社出版1
控制系统的设计
控制系统结构。
控制系统的电路由温度检测电路、执行电路和控制电路组成
控制电路、显示电路、报警电路等，
对冷库温度的检测将数据上传至MCU，微控制器将
检测温度值和数值比较的温度设置，如果设置
温度值高于时，微控制器将向继电器驱动器输出控制信号
电机停止运行，黄色灯亮提示；如果检测到的温度低于设定值
范围、绿灯和电机不工作。同时，微控制器将检测
LCD1602显示屏上显示的温度值，以便人们可以看到温度是如何变化的
直观的冷却控制过程。控制系统结构图如图1所示。
图1实验室仪器管理结构
温度检测电路
DS18B20有四个主要数据组件：1）64位激光ROM，2）温度传感器，3）
非易失性温度报警触发TH和TL，4）配置寄存器。该设备从
通过在周期内将能量存储在内部电容器上，从单线通信线路供电
当信号线处于高电平并且在低电平期间继续在该电源断开的情况下工作时
直到其返回高电平以补充寄生（电容器）电源。作为
此外，DS18B20也可由外部3伏-5.5伏电源供电。
与DS18B20的通信通过1线端口进行。使用1线端口，内存和控制
在ROM功能协议建立之前，功能将不可用。
采用DS18B20芯片实现温度检测。高集成度数字
温度传感器DS18B20采用单总线式结构，具有体积小、成本低的优点
功耗和抗干扰。DS18B20数字温度计提供9至12位
（可配置）指示设备温度的温度读数。核心
DS18B20的功能是其直接数字温度传感器。委员会的决议
DS18B20可配置（9、10、11或12位），12位读数为出厂默认状态。这
相当于0.5°C、0.25°C、1.125°C或0.0625°C的温度分辨率。温度
执行转换，并且热数据以16位存储在草稿存储器中，
符号扩展为二的补码格式。温度信息可通过
转换完成后，通过发出读取草稿行[BEh]命令实现单线接口
执行。数据首先通过1线总线LSB传输。温度的高有效位
寄存器包含“符号”（S）位，表示温度是正还是负。
促动器
单片机通过光电开关和晶体管控制继电器的通断，终控制
冷却的目的。图2当温度超过

MSK030C-0900-NN-M1-UG0-NNNN

MSK030C-0900-NN-M1-UG0-NNNN

For cold storage temperature control system, and the following three schemes: 1. Selection of FPGA 
programmable logic device, by using FPGA device can greatly shorten the design time of the system 
and make the products to market faster, and then to enhance the competition ability of the product. 2 
PLC programmable logic device, the PLC as the control system, it is characterized by the processing 
of the signal time is short, the progress is fast, and timely. All the I/O input and output signal are 
selected photoelectric isolation, with good self identification function. 3 STC STC89S52 
microcontroller, which is characterized by low power consumption, high performance, the price is 
cheaper, and and the traditional 8051 microcontroller are compatible. Using this design scheme, 
considering the practicality and price, the chips and devices are common components, the cheap price 
for the whole system construction, and the prospect of this system is good. 
This design to STC89S52 SCM as the mastermind, DS18B20 temperature sensor range - 50 DEG 
to 120 DEG C, the measured temperature is sent to STC89S52 SCM, the MCU, the temperature in the 
display circuit is displayed in real time, the system recovery is 1602 LCD module display. This 
system can not only display the temperature can also be used to a specific temperature value is set out, 
to measure the temperature real-time monitoring and control, when the temperature is higher than the 
set temperature, it will immediately make corresponding temperature equipment work rapidly adjust 
the cold storage temperature, so as to achieve the constant temperature state, then the control system 
is stable operation, the control automation. 
International Conference on Electromechanical Control Technology and Transportation (ICECTT 2015) © 2015. The authors - Published by Atlantis Press 1
The Design of control system 
Control system structure. 
The circuit of the control system is composed of the temperature detecting circuit, the executing 
control circuit, the displaying circuit, the alarming circuit and so on.. DS18B20 temperature detection, 
detection to the cold storage temperature will upload the data to the MCU, microcontroller will the 
detected temperature value and the temperature setting of the numerical comparison, if the set 
temperature value is higher than, the microcontroller will output a control signal to the relay drives 
the motor to run down, and yellow lantern light prompt; if the detected temperature is below the set 
range, the green light and motor does not work. At the same time, the microcontroller will detect the 
temperature values displayed on the LCD1602 display, so that people can see how the temperature is 
intuitive and the process of cooling control. Control system structure diagram shown in Figure 1. 
Fig.1. Structure of laboratory instruments management 
Temperature detection circuit 
The DS18B20 has four main data components: 1) 64-bit lasered ROM, 2) temperature sensor, 3) 
nonvolatile temperature alarm triggers TH and TL, 4) a configuration register. The device derives its 
power from the 1-Wire communication line by storing energy on an internal capacitor during periods 
of time when the signal line is high and continues to operate off this power source during the low 
times of the 1-Wire line until it returns high to replenish the parasite (capacitor) supply. As an 
alternative, the DS18B20 may also be powered from an external 3 volt - 5.5 volt supply. 
Communication to the DS18B20 is via a 1-Wire port. With the 1-Wire port, the memory and control 
functions will not be available before the ROM function protocol has been established. 
The DS18B20 chip is used to realize the temperature detection. High integrated digital 
temperature sensor DS18B20 uses single bus type structure, has the advantages of small size, low 
power consumption and anti-interference. The DS18B20 Digital Thermometer provides 9 to 12-bit 
(configurable) temperature readings which indicate the temperature of the device. The core 
functionality of the DS18B20 is its direct-to-digital temperature sensor. The resolution of the 
DS18B20 is configurable (9, 10, 11, or 12 bits), with 12-bit readings the factory default state. This 
equates to a temperature resolution of 0.5°C, 0.25°C, 0.125°C, or 0.0625°C. A temperature 
conversion is performed and the thermal data is stored in the scratchpad memory in a 16-bit, 
sign-extended two’s complement format. The temperature information can be retrieved over the 
1-Wire interface by issuing a Read Scratchpad [BEh] command once the conversion has been 
performed. The data is transferred over the 1-Wire bus, LSB first. The MSB of the temperature 
register contains the “sign” (S) bit, denoting whether the temperature is positive or negative. 
Actuator 
SCM through the photoelectric switch and the transistor control relay on-off, the final control of the 
purpose of cooling. Figure 2 of the motor, when the temperature exceeds the limit indicated that the 
cooling device. When the temperature is lower than the set value, the microcontroller P3.7 sends a 
high level signal photoelectric switch no action, so the relay is disconnected, the motor does not 
rotate. 
When the temperature exceeds the set temperature upper limit, SCM P3.7 send low level signal 
photoelectric switch action so that relay switch closed motor operated, achieve the purpose of cooling, 
2
when the temperature is lower than the set temperature value of the minimum MCU P3.7 sent a high 
level signal, electric machine stops running. Thus, the temperature can be stable in the setting 
temperature range. 
The relay circuit has a protective circuit of the transistor, which is about to reverse the three ends 
of the tube.. Connect methods as shown in Figure 2. When the relay suddenly power off, the relay 
generates a large reverse current. The role of the diode is to reverse current diversion, so that the 
current flow through the three tube current i