CN202956869U

CN202956869U - Wireless temperature acquisition system designed based on thermocouple self-detection

Info

Publication number: CN202956869U
Application number: CN 201220573344
Authority: CN
Inventors: 文涵灵
Original assignee: CHENGDU ZHUOCHENG TECHNOLOGY Co Ltd
Current assignee: CHENGDU ZHUOCHENG TECHNOLOGY Co Ltd
Priority date: 2012-11-02
Filing date: 2012-11-02
Publication date: 2013-05-29
Anticipated expiration: 2022-11-02

Abstract

The utility model discloses a wireless temperature acquisition system designed based on thermocouple self-detection. The wireless temperature acquisition system designed based on the thermocouple self-detection comprises an upper computer and a lower computer, wherein the upper computer is connected with the lower computer in a wireless mode. The upper computer is composed of a wireless receiving circuit and a personal computer (PC), wherein the wireless receiving circuit and the PC are connected in sequence. The lower computer is composed of a thermocouple signal conditioning circuit and a wireless launching circuit, wherein the thermocouple signal conditioning circuit and the wireless launching circuit are connected in sequence. The wireless launching circuit is connected with the wireless launching circuit in a wireless mode. A self-detection circuit is arranged in the thermocouple signal conditioning circuit. The wireless temperature acquisition system designed based on the thermocouple self-detection is simple in structure, reasonable in design, capable of effectively avoiding the conditions, such as long consumed time and waste of energy, caused by manual detection, energy-saving and environment-friendly due to the fact that automatic detection of a thermocouple which is used when temperature data are collected, and capable of improving temperature measurement precision of the system and working efficiency.

Description

Wireless temperature acquisition system based on thermopair self check design

Technical field

The utility model relates to data collecting field, specifically, is based on the wireless temperature acquisition system of thermopair self check design.

Background technology

The theory diagram of traditional wireless temperature acquisition system as shown in Figure 1, comprise the upper computer module and the slave computer module that adopt the wireless data channel contact, wherein, upper computer module mainly is comprised of the serial communication circuit between the wireless receiving circuit under Single-chip Controlling, PC and wireless transmit/receive units; The slave computer module comprises the thermal couple signal conditioning circuit that is comprised of thermopair, signal amplifier and, by the radio transmitter under Single-chip Controlling, is mainly used in industrial high temperature observing and controlling aspect.During use, the interface position of thermopair in research object and TT&C system, be perception, obtain and the window that detects information, the function of system has been played to conclusive effect, and in commercial production, as main temperature element, for accuracy and normal use that guarantees thermopair, after it uses a period of time, often to carry out periodic calibration, industrial common employing direct comparison method identified, that is: tested thermopair and standard couple are banded together and send into assay furnace and examined and determine.Industrial, traditional calibrating installation complex structure, also need after calibrating by manual measurement, table look-up, data process to compare, too loaded down with trivial details, the consuming time length of operator scheme, not only waste energy, some personal errors also easily occur, more reduced measuring accuracy and the work efficiency of whole temperature acquisition system.

The utility model content

The purpose of this utility model is to provide the wireless temperature acquisition system based on thermopair self check design, by being located at the self-checking circuit in thermal couple signal conditioning circuit, also can carry out automatic on-site proving to thermal couple signal conditioning circuit when realizing temperature data acquisition, and the mode by wireless transmission sends to and is shown on PC and contrast, function with automatic Verification, mainly for industrial temperature acquisition, can effectively improve the work efficiency of whole temperature acquisition system.

The utility model is achieved through the following technical solutions: the wireless temperature acquisition system based on thermopair self check design, the upper computer module and the slave computer module that comprise wireless connections, described upper computer module is by connected successively wireless receiving circuit, PC forms, described slave computer module is by connected successively thermal couple signal conditioning circuit, radio transmitter forms, described wireless receiving circuit, the radio transmitter wireless connections, the utility model is provided with self-checking circuit in described thermal couple signal conditioning circuit, be mainly used in industrial high temperature observing and controlling aspect, can realize the automatic detection of thermal couple signal conditioning circuit, that has avoided artificial testing process to occur is consuming time, energy dissipation, the deficiencies such as personal error, acquisition capacity and the degree of accuracy of system have been improved greatly.

For better realizing the utility model, described wireless receiving circuit comprises successively connected single-chip microcomputer U1 and wireless receiving chip, described radio transmitter comprises successively connected single-chip microcomputer U2 and wireless transmit chip, and described single-chip microcomputer U1 is connected on PC; Described wireless receiving chip and the wireless connections of wireless transmit chip; Described thermal couple signal conditioning circuit, self-checking circuit are connected in series on single-chip microcomputer U2.

In said structure, described thermal couple signal conditioning circuit comprises connected successively thermopair, signal amplifier M1, described selftest module comprises successively connected thermopair detection module, signal amplifier M2, described thermopair and thermopair detection module are the temperature collecting device that converts temperature signal to current signal and be delivered to signal amplification circuit, described signal amplifier M1, signal amplifier M1 is connected in series on single-chip microcomputer U2, wherein, thermopair and thermopair detection module can adopt standard couple, as: platinum rhodium 10-platinum thermocouple (S type), platinum rhodium 30-platinum rhodium 6(B type) or nickel chromium-nickel silicon thermocouple (K type), thermopair to using in temperature data acquisition, the thermopair detection module carries out automatic on-site proving, be delivered on single-chip microcomputer U2, two-part data send to and are shown on PC and contrast by the mode of wireless transmission again, thereby determine the performance situation of tested thermopair.

The utility model also is provided with analog to digital conversion circuit A1 and analog to digital conversion circuit A2 in described slave computer module, and described signal amplifier M1 is connected on single-chip microcomputer U2 by analog to digital conversion circuit A1; Described signal amplifier M2 is connected on single-chip microcomputer U2 by analog to digital conversion circuit A2, analog to digital conversion circuit A1/ analog to digital conversion circuit A2 can adopt A/D converter to receive the simulating signal from signal amplifier M1/ signal amplifier M2, and converts thereof into digital signal and offer single-chip microcomputer U2.

The utility model also is provided with telecommunication circuit in described upper computer module, and described single-chip microcomputer U1 is connected with PC by telecommunication circuit, by this telecommunication circuit, can realize the transmission of data and the displays temperature collection result on PC.

The utility model compared with prior art, has the following advantages and beneficial effect:

(1) the utility model passes through self-checking circuit, can realize, in temperature data acquisition, the thermopair used is carried out to automatic on-site proving, the mode of two-part data by wireless transmission sends to and shown on PC and contrast, thereby determine the performance situation of tested thermopair, function with automatic Verification thermopair, the deficiencies such as consuming time, the energy dissipation of having avoided artificial testing process to occur, personal error, improved acquisition capacity and the degree of accuracy of system greatly.

(2) the utility model circuit structure is simple, and it is upper that described self-checking circuit is connected in single-chip microcomputer U2 by serial line interface, and syndeton is simple, during making, only need to improve and to get final product existing wireless temperature collecting device, greatly saved cost of manufacture, economic benefit is high.

(3) the utility model is mainly used in industrial temperature acquisition, and when practical operation, the thermoelectricity that can adopt according to the requirement of industrial thermometric different precision, sensitivity occasionally thermopair detection module is measured, practical.

The accompanying drawing explanation

The theory diagram that Fig. 1 is wireless temperature acquisition system in prior art.

Fig. 2 is theory diagram of the present utility model.

The structural representation that Fig. 3 is the utility model thermal couple signal conditioning circuit/self-checking circuit.

Embodiment

Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.

Embodiment:

Wireless temperature acquisition system based on thermopair self check design, the upper computer module and the slave computer module that comprise wireless connections, as shown in Figure 2, upper computer module is comprised of connected successively wireless receiving circuit, PC, the slave computer module is comprised of connected successively thermal couple signal conditioning circuit, radio transmitter, wherein, wireless receiving circuit is realized communicating by letter by wireless connections with radio transmitter.In the structure of existing wireless temperature acquisition system as shown in Figure 1, for accuracy and normal use that guarantees thermal couple signal conditioning circuit, after it uses a period of time, often to carry out periodic calibration, and in testing process, often there will be operating process loaded down with trivial details, length consuming time, the problems such as energy dissipation or some personal errors, therefore, the utility model is provided with self-checking circuit in thermal couple signal conditioning circuit, can realize the automatic detection of thermal couple signal conditioning circuit, the deficiencies in the prior art have been overcome, acquisition capacity and the degree of accuracy of system have been improved greatly, can be applicable to industrial high temperature observing and controlling aspect.

Structure of the present utility model can be summarized as follows:

(1) slave computer module: it mainly can realize the multi-point data acquisition of temperature, comprise the data acquisition end formed by thermal couple signal conditioning circuit and self-checking circuit, analog to digital conversion circuit, single-chip microcomputer U2 and the wireless transmit chip be connected with single-chip microcomputer form, wherein, analog to digital conversion circuit comprises analog to digital conversion circuit A1, analog to digital conversion circuit A2, thermal couple signal conditioning circuit and self-checking circuit are as shown in Figure 2, respectively by analog to digital conversion circuit A1, analog to digital conversion circuit A2 is connected in series on single-chip microcomputer U2, during application, analog to digital conversion circuit A1, analog to digital conversion circuit A2 can adopt A/D converter, single-chip microcomputer U2 can adopt STC12LE5410AD.

In said structure, thermal couple signal conditioning circuit comprises connected successively thermopair, two modules of signal amplifier M1, can complete the data acquisition function of tested thermopair, its current signal output is 4～20mA weak current: signal amplifier M1 is converted to the weak current of 4～20mA of thermopair output voltage signal and amplifies, Output rusults should meet the conversion range of A/D converter, and A/D converter converts thereof into digital signal and offers single-chip microcomputer U2, same, selftest module comprises successively connected thermopair detection module, signal amplifier M2, can complete the automatic detection function to tested thermopair, wherein the thermopair detection module is arranged in high temperature furnace, and convert high temperature furnace measured point temperature information to voltage: signal amplifier M2 amplifies the small-signal of thermopair detection module output, be sent to single-chip microcomputer U2 by A/D converter, under the control of single-chip microcomputer U2, by the wireless transmit chip, the data of receiving are encoded, then by output port, export, the structural representation that Fig. 3 is thermal couple signal conditioning circuit/self-checking circuit.

(2) upper computer module: it can manage the operation of whole wireless data acquisition system and control, and as shown in Figure 2, mainly connected successively PC, telecommunication circuit, single-chip microcomputer U1 and wireless receiving chip, consists of.Its principle is as follows: the wireless receiving chip receives the signal that the wireless transmit chip output sends, the row decoding of going forward side by side, become the displayable data of host computer, PC realizes that by telecommunication circuit data transmit and the structure of displays temperature data acquisition on PC, the calibrating information of thermopair and the calibrating information of thermopair detection module are shown and are contrasted on PC, thereby determine the performance situation of tested thermopair, there is the function of automatic Verification.

In the utility model, thermopair is as tested thermopair, the same with the thermopair detection module, can adopt standard couple, as platinum rhodium 10-platinum thermocouple (S type), platinum rhodium 30-platinum rhodium 6(B type) or the model such as nickel chromium-nickel silicon thermocouple (K type); Wireless transmit chip and wireless receiving chip can adopt PTR8000; Telecommunication circuit can adopt interface chip to control, as: chip MAX323.

The utility model is simple in structure, reasonable in design, the situations such as length consuming time, energy dissipation and personal error of effectively having avoided manual detection to cause, can also carry out automatic Verification to the thermopair in using in temperature data acquisition, not only energy-conserving and environment-protective, can also improve temperature measurement accuracy and the work efficiency of system.

The above; it is only preferred embodiment of the present utility model; not the utility model is done to any pro forma restriction, any simple modification, equivalent variations that every foundation technical spirit of the present utility model is done above embodiment, within all falling into protection domain of the present utility model.

Claims

1. the wireless temperature acquisition system designed based on the thermopair self check, the upper computer module and the slave computer module that comprise wireless connections, described upper computer module is comprised of connected successively wireless receiving circuit, PC, described slave computer module is comprised of connected successively thermal couple signal conditioning circuit, radio transmitter, described wireless receiving circuit, radio transmitter wireless connections is characterized in that: in described thermal couple signal conditioning circuit, be provided with self-checking circuit.

2. the wireless temperature acquisition system based on thermopair self check design according to claim 1, it is characterized in that: described wireless receiving circuit comprises successively connected single-chip microcomputer U1 and wireless receiving chip, described radio transmitter comprises successively connected single-chip microcomputer U2 and wireless transmit chip, and described single-chip microcomputer U1 is connected on PC; Described wireless receiving chip and the wireless connections of wireless transmit chip; Described thermal couple signal conditioning circuit, self-checking circuit are connected in series on single-chip microcomputer U2.

3. the wireless temperature acquisition system based on thermopair self check design according to claim 2, it is characterized in that: described thermal couple signal conditioning circuit comprises connected successively thermopair, signal amplifier M1, described selftest module comprises successively connected thermopair detection module, signal amplifier M2, described thermopair and thermopair detection module are the temperature collecting device that converts temperature signal to current signal and be delivered to signal amplification circuit, and described signal amplifier M1, signal amplifier M1 are connected in series on single-chip microcomputer U2.

4. the wireless temperature acquisition system based on thermopair self check design according to claim 3, it is characterized in that: also be provided with analog to digital conversion circuit A1 and analog to digital conversion circuit A2 in described slave computer module, described signal amplifier M1 is connected on single-chip microcomputer U2 by analog to digital conversion circuit A1; Described signal amplifier M2 is connected on single-chip microcomputer U2 by analog to digital conversion circuit A2.

5. the wireless temperature acquisition system based on thermopair self check design according to claim 4, it is characterized in that: also be provided with telecommunication circuit in described upper computer module, described single-chip microcomputer U1 is connected with PC by telecommunication circuit.