CN203881456U

CN203881456U - Multi-channel temperature remote acquisition and display system

Info

Publication number: CN203881456U
Application number: CN201420093295.7U
Authority: CN
Inventors: 吴蓉; 杨全胜; 王泽栋; 王仲夏
Original assignee: HEHAI UNIVERSITY WENTIAN COLLEGE
Current assignee: HEHAI UNIVERSITY WENTIAN COLLEGE
Priority date: 2014-03-03
Filing date: 2014-03-03
Publication date: 2014-10-15
Anticipated expiration: 2024-03-03

Abstract

The utility model discloses a multi-channel temperature remote acquisition and display system, belongs to temperature detection equipment, and especially relates to a multi-channel temperature remote acquisition and display system. The multi-channel temperature remote acquisition and display system is characterized in that the system further comprises a storage module and a clock circuit; the storage module is connected to pins from P3.2 to P3.7 of a single-chip microcomputer, and stores data acquired by a temperature sensor in a TXT format in a USB device; and the clock circuit is connected to pins P3.3, P1.0 and P1.1 of the single-chip microcomputer, provides a time signal for the entire system and records the time of data operation when the data is stored. The multi-channel temperature remote acquisition and display system is advantageous in that when remote temperature or deep underground temperature is tested, a hardware SPI protocol built in a USB storage chip CH376 is used for fast reading and writing for the USB device, a stable data exchange environment is provided when a file is read or written, and the test site and time can be conveniently recorded and stored into the USB storage device.

Description

Multi way temperature remote capture display system

Technical field

The utility model belongs to temperature testing equipment, relates in particular to a kind of multi way temperature remote capture display device.

Background technology

Temperature is being played the part of extremely important role in mankind's daily life, and in industrial and agricultural production process, temperature detection tool is of great significance simultaneously.Traditional temperature sensor uses thermistor as temperature-sensing element (device), can be used for temperature automatic checkout and control system large-scale, that there are a plurality of measurement points, thermistor temperature sensor is by being transformed to analog voltage signal by temperature information, again voltage signal is amplified in the manageable scope of single-chip microcomputer, through low-pass filtering, filter undesired signal and be conveyed into single-chip microcomputer, single-chip microcomputer outputs to static its temperature that shows of LED.Sort circuit is when remote transmission analog voltage signal, keep away the intensity that unavoidably slackens signal in circuit, surpass 30 meters of signals and will decay clearly, cause temperature value accuracy and precision low, easily be subject to the interference of outer signals, be therefore not suitable for long-distance transmissions simultaneously.

Chinese invention patent < < multi-point Temperature Acquisition System and acquisition method > > thereof (publication number CN 101852652 A) disclose a kind of multi-point Temperature Acquisition System, comprise several temperature sensors, also comprise successively connected PIC single-chip computer control system, RS232 communication module and PC computer master controller, PIC single-chip computer control system is also connected with a liquid crystal indicator and a keyboard, several temperature sensors are hung on same bus, PIC single-chip computer control system is hung in this bus.The defect existing is that this temperature acquisition system can only show temperature in LCD screen, and when there are the data of a plurality of different times, temperature data cannot be preserved, and follow-up temperature data analysis is brought to very large inconvenience, is unfavorable for the real-time detection to temperature.

Summary of the invention

The defect existing in order to overcome prior art, the purpose of this utility model is to provide a kind of multi way temperature remote capture display system, realize remote temperature sampling, data transmission is stable, be difficult for disturbed, measure Temperature numerical accuracy and precision high, temperature data is easy to preserve, and is conducive to the real-time detection to temperature.

Multi way temperature remote capture display system, comprise DS18B20 temperature sensor, 51 single-chip microcomputers, liquid crystal indicator and key device with single-chip microcomputer electrical connection, PC computer master controller, single-chip microcomputer is connected by RS232 communication module with PC computer master controller, temperature sensor is connected on same bus, single-chip microcomputer is connected in this bus, be characterized in that this system also comprises memory module and clock circuit, described memory module is connected with P3.2 to the P3.7 pin of single-chip microcomputer, the data that temperature sensor is collected are stored in the middle of USB flash disk equipment with TXT text formatting, described clock circuit is connected with P1.1 with the P3.3 of single-chip microcomputer, P1.0, for whole system provides the time signal of a standard, records the data manipulation of when carrying out when data are stored.

The utility model further improves, described memory module adopts CH376 chip, CH376 chip is connected with P3.2 to the P3.7 pin of single-chip microcomputer, the data that temperature sensor is collected are stored in USB flash disk equipment with TXT text formatting, CH376 realizes Data Control with hardware SPI agreement, user can open with computer the text of record data, the data of record before can analyzing intuitively.

The utility model further improves, described clock circuit consists of DSC1302 chip and peripheral circuit, DSC1302 chip is connected with P1.1 with P3.3, the P1.0 of single-chip microcomputer, can provide year, month, day, hour, min, second, what day etc. data characteristics amount, P3.3 is chip reset pin, P1.0 is clock pin, and P1.1 is data pin, utilizes single-chip microcomputer to obtain the current time to these decoding datas.

During work, first single-chip microcomputer gathers control temperature sensor DS18B20 to temperature, then after the data of returning being processed, by liquid crystal indicator, show, for reconnoitring on-the-spot temperature data, by pressing the menu directory at key assignments liquid crystal display interface: system time and sampling number, utilize button to select sampled data whether to need to be stored in USB flash disk, for follow-up, carry out data analysis.

Compared with prior art, advantage is novel, and structure letter gathers, rationally; Can be in the longer-distance temperature of test, or darker subsurface temperature, utilize the hardware SPI agreement that USB flash disk storage chip CH376 carries to carry out fast reading and writing to USB flash disk equipment, when reading and writing of files, there is a stable exchanges data environment, and record very easily testing location, test duration, be stored in the middle of USB memory device.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is the structured flowchart of multi way temperature remote capture display system;

Fig. 2 is the utility model minimum system schematic diagram;

Fig. 3 is RS-232 serial communication schematic diagram;

Fig. 4 is lithium battery booster circuit of the present utility model;

Fig. 5 is the circuit theory diagrams of USB memory device of the present utility model;

Fig. 6 is the interface circuit schematic diagram of liquid crystal display of the present utility model;

Fig. 7 is the circuit theory diagrams of clock circuit of the present utility model;

Fig. 8 is the circuit theory diagrams of key device of the present utility model.

Embodiment

Below in conjunction with embodiment, the utility model will be further described.

As seen from Figure 1, multi way temperature remote capture display system, comprise DS18B20 temperature sensor, 51 single-chip microcomputers, with the liquid crystal indicator of single-chip microcomputer electrical connection and key device, PC computer master controller, single-chip microcomputer is connected by RS232 communication module with PC computer master controller, temperature sensor is connected on same bus, and single-chip microcomputer is connected in this bus.Single-chip microcomputer (2) is the core component of whole system, it detects button (1) thereby the state of P2.0 and P2.1 is controlled and made corresponding decision-making system, simultaneously it will be controlled temperature sensor (6) P1.2 and carry out data acquisition to P1.7, then by single-chip microcomputer, by the data processing collecting, again give liquid crystal display (3), the P2.2 of single-chip microcomputer controls LCDs to P2.6 and P0 mouth, so that show intuitively quantity of information, single-chip microcomputer is by the data volumes such as temperature that collect, according to the time, place is different, utilize CH376(5) store TXT text storage in USB flash disk (7), the P3.2 of single-chip microcomputer controls to P3.7 pin, single-chip microcomputer is realized the communication between single-chip microcomputer and PC computer (8) by P3.0 and P3.1 pin by RS232 serial communication (4) in addition, clock circuit (9) provides the time signal of a standard for whole system, when being stored, data record the data manipulation of when carrying out, when needs carry out data analysis, in TXT text the inside, will show the sampled data that the sampling time is corresponding.

Being the circuit theory diagrams of the single-chip minimum system in Fig. 1 single-chip microcomputer (2) as shown in Figure 2, is the core of system, for whole equipment provides core control thought, arranges each module co-ordination.

Be the circuit theory diagrams of Fig. 1 RS232 serial communication (4) module as shown in Figure 3, single-chip microcomputer can carry out real-time communication by this equipment and PC computer master controller, and return data characteristic quantity, is convenient to user and analyzes on computers data and operation slave computer in real time.

Be the supply module of whole system as shown in Figure 4, it adopts the lithium battery of 3.3V, and circuit utilizes TP8350 to carry out copped wave and boosts to 5V, to whole system power supply, and stable output 5V voltage, electric current can reach 1A, there is no electric local convenient working.

The circuit theory diagrams of Fig. 1 CH376 storage (5) as shown in Figure 5, its data that single-chip microcomputer is collected from temperature sensor are stored in USB flash disk equipment with TXT text formatting, chip CH376 realizes Data Control with hardware SPI agreement, user can open with computer the text of record data, the data of record before can analyzing intuitively.

The interface circuit of Fig. 1 liquid crystal display (3) module as shown in Figure 6, wherein P2.2 is to control mouth to P2.6, P0 is FPDP, single-chip microcomputer according to liquid crystal display regulation sequential by the information that drives the sequential of these interfaces that needs are shown, be clearly presented in LCDs.

The circuit theory diagrams of Fig. 1 clock circuit (9) as shown in Figure 7, this clock circuit consists of DS1302 chip and peripheral circuit, DSC1302 chip is connected with P1.1 with P3.3, the P1.0 of single-chip microcomputer, can provide year, month, day, hour, min, second, what day etc. data characteristics amount, P3.3 is chip reset pin, P1.0 is clock pin, and P1.1 is data pin, utilizes single-chip microcomputer to obtain the current time to these decoding datas.

The circuit theory diagrams of Fig. 1 key device (1) as shown in Figure 8, this circuit is connected with P2.1 with single-chip microcomputer P2.0 and reading state, whether by button, system time is set and is selected current data to store by button, complete when data storage, end data is stored.

Claims

1. multi way temperature remote capture display system, comprise DS18B20 temperature sensor, 51 single-chip microcomputers, with the liquid crystal indicator of single-chip microcomputer electrical connection and key device, PC computer master controller, single-chip microcomputer is connected by RS232 communication module with PC computer master controller, temperature sensor is connected on same bus, single-chip microcomputer is connected in this bus, it is characterized in that this system also comprises memory module and clock circuit, described memory module is connected with P3.2 to the P3.7 pin of single-chip microcomputer; Described clock circuit is connected with P1.1 with the P3.3 of single-chip microcomputer, P1.0.

2. multi way temperature remote capture display system according to claim 1, is characterized in that described memory module adopts CH376 chip, and CH376 chip is connected with P3.2 to the P3.7 pin of single-chip microcomputer.

3. multi way temperature remote capture display system according to claim 1, it is characterized in that described clock circuit consists of DSC1302 chip and peripheral circuit, DSC1302 chip is connected with data pin P1.1 with chip reset pin P3.3, the clock pin P1.0 of single-chip microcomputer.