CN202886003U

CN202886003U - Intelligent multichannel temperature collection instrument

Info

Publication number: CN202886003U
Application number: CN 201220490542
Authority: CN
Inventors: 刘水平
Original assignee: CHANGSHA SANZHI ELECTRIC TECHNOLOGY Co Ltd
Current assignee: CHANGSHA SANZHI ELECTRIC TECHNOLOGY Co Ltd
Priority date: 2012-09-25
Filing date: 2012-09-25
Publication date: 2013-04-17
Anticipated expiration: 2022-09-25

Abstract

The utility model relates to an intelligent multichannel temperature collection instrument, comprising a single-chip microcomputer, a JTAG interface, a clock circuit, a temperature sensor and a power supply module, wherein the JTAG interface, the clock circuit and the power supply module are connected with the corresponding pins of the single-chip microcomputer respectively, the temperature sensor is connected with the single-chip microcomputer through an I/O port, one SPI bus interface and one UART interface of the single-chip microcomputer are connected with a memory module and an RS485 module respectively, the RS485 module is connected with a wired communication module or a wireless module, the wired communication module or the wireless module is connected with an RS485-to-RS232 module, and the RS485-to-RS232 module is connected with a control center PC machine. The intelligent multichannel temperature collection instrument is high in reliability, precision and stability, is suitable for long-term observation, employs a full digital observation mode, can ensure signals to be transmitted for a long distance without deformation, and is strong in anti-interference capability.

Description

The multichannel temperature instrument for intelligently sampling

Technical field

The utility model relates to robotization temperature remote collecting system, is specially a kind of multichannel temperature instrument for intelligently sampling.

Background technology

Temperature survey is modal problem in the industrial circle, and thermal resistance and thermopair are temperature sensors the most frequently used in the industrial process temperature survey.The thermal resistance degree of accuracy is high, good stability.The measurement of higher temperature is the thermocouple sensors that adopt then more.In the side circuit, the signal of thermopair output only is zero to tens millivolts, wherein comprise power frequency component, the common mode interference such as magnetic coupling, the measurement amplifying circuit that needs the high conjugated analoging systeming ratio of employing and high-gain, low noise, high input impedance, and thermopair needs cold junction compensation, causes the circuit complexity and is difficult to debugging.So develop thus the temperature intelligent Acquisition Instrument, its essence is a robotization temperature remote collecting system, can be divided into several parts such as system initialization, system parameter setting, data acquisition, data processing, communication from system function division.Data acquisition with process the variable comprise the relevant collection of initialization, sample frequency is set, acquisition time section etc., the signal procedure groundwork is the transplanting of ICP/IP protocol, realize transfer files and dynamic interaction, occupying system resources is less, and this system can adopt powered battery simultaneously, is applicable to the remote collection of the abominable industry spot of environment.But existing temperature intelligent Acquisition Instrument complicated operation, degree of accuracy is not enough, and stable, poor reliability, easy distortion when the long Distance Transmission of signal demand, poor anti jamming capability can not be suitable for monitoring requirements.

The utility model content

The technical matters that the utility model solves is to provide a kind of multichannel temperature instrument for intelligently sampling, to solve the shortcoming in the above-mentioned background technology.

The technical matters that the utility model solves realizes by the following technical solutions:

The multichannel temperature instrument for intelligently sampling, comprise single-chip microcomputer, jtag interface, clock circuit, temperature sensor and power module, described jtag interface, clock circuit links to each other with described single-chip microcomputer respective pins respectively with power module, described temperature sensor links to each other with described single-chip microcomputer by the I/O mouth, a spi bus interface of described single-chip microcomputer links to each other with the RS485 module with memory module respectively with a UART interface, described RS485 module links to each other with wire communication module or wireless module, described wire communication module or wireless module link to each other with RS485 RS 232 module, and described RS485 RS 232 module links to each other with the control center PC.

In the utility model, described single-chip microcomputer can increase temperature sensor quantity according to actual needs, can add at most 48 temperature sensors.

Beneficial effect

The utlity model has high reliability, high precision and high stability, be applicable to long-term observation, and adopt all-digital detection, the signal long-distance transmission is undistorted, and antijamming capability is strong.

Description of drawings

Fig. 1 is the cut-away view of multichannel temperature instrument for intelligently sampling.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Referring to Fig. 1, the cut-away view of multichannel temperature instrument for intelligently sampling, the multichannel temperature instrument for intelligently sampling, comprise single-chip microcomputer 1, jtag interface 4, clock circuit 3, temperature sensor 5 and power module 2, described jtag interface 4, clock circuit 3 links to each other with described single-chip microcomputer respective pins respectively with power module 2, temperature sensor 5 links to each other with described single-chip microcomputer by the I/O mouth, a spi bus interface of described single-chip microcomputer 1 links to each other with RS485 module 7 with memory module 6 respectively with a UART interface, described RS485 module 7 links to each other with wire communication module 9 or wireless module 8, described wire communication module 9 or wireless module 8 link to each other with RS485 RS 232 module 10, and described RS485 RS 232 module 10 links to each other with control center PC 11.

In the utility model, described single-chip microcomputer can increase temperature sensor quantity according to actual needs, can add at most 48 temperature sensors.The utility model adopts DS18B20 temperature sensor collecting temperature signal, and convenient succinct, degree of accuracy is high, and the data of collection just can directly not be converted to temperature value by any processing.Adopt the MAX1480 chip as data communication interface, transceiver, optocoupler, power supply driver and transformer are integrated in the 28 pin DIP encapsulation of a standard, and complete interface scheme is provided.Signal and power supply by electrical isolation in internal transmission.Power supply is transferred to the electrical isolation side from logic side (non-side of isolation) by a centre-tapped transformer, and signal is realized electrical isolation by high speed photo coupling.Finally by host computer can intelligence system is carried out Real Time Monitoring and data acquisition, need not human intervention, and can generate along with the variation of time an accurately thetagram, observability is good.

More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model; the technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. multichannel temperature instrument for intelligently sampling, comprise single-chip microcomputer, jtag interface, clock circuit, temperature sensor and power module, described jtag interface, clock circuit links to each other with described single-chip microcomputer respective pins respectively with power module, it is characterized in that, described temperature sensor links to each other with described single-chip microcomputer by the I/O mouth, a spi bus interface of described single-chip microcomputer links to each other with the RS485 module with memory module respectively with a UART interface, described RS485 module links to each other with wire communication module or wireless module, described wire communication module or wireless module link to each other with RS485 RS 232 module, and described RS485 RS 232 module links to each other with the control center PC.

2. multichannel temperature instrument for intelligently sampling according to claim 1 is characterized in that, described single-chip microcomputer can increase temperature sensor quantity according to actual needs, can add at most 48 temperature sensors.