CN205262630U

CN205262630U - High accuracy multichannel temperature acquisition device

Info

Publication number: CN205262630U
Application number: CN201520968482.XU
Authority: CN
Inventors: 梁文帅; 白斌; 王伯涛
Original assignee: Tianjin Fire Fighting Institute Ministry of Public Security
Current assignee: Tianjin Fire Fighting Institute Ministry of Public Security
Priority date: 2015-11-30
Filing date: 2015-11-30
Publication date: 2016-05-25
Anticipated expiration: 2025-11-30

Abstract

The utility model relates to a high accuracy multichannel temperature acquisition device. 16 16 individual passageway RS482 signal output K type thermocouple temperature collection module constitute K type thermocouple temperature collection module group, install one 16 passageway temperature data collection wiring end on every 16 passageway RS482 signal output K type thermocouple temperature collection module, 16 16 individual passageway RS482 signal output K type thermocouple temperature collection module signal output end is parallelly connected, the passing signal line connection is to the USB -RS485 signal converter signal input part, the terminal resistance of signal line of end -to -end connection of signal line, USB -RS485 signal converter signal output part and USB interface connection, 16 16 individual passageway RS482 signal output K type thermocouple temperature collection module's power end is parallelly connected, and the DC output through direct current supply line 7 and steady voltage DC power supply 4 is connected and accepts the power supply. The effect is: this type of experimental all kinds of requirements to gathering passageway quantity, measurement accuracy and collection system cost have been satisfied. This device overall structure is reliable, and the principle is clear and definite, and maneuverability is strong.

Description

A kind of high-precision multi-path temperature collecting device

Technical field

The utility model relates to temperature collecting device, particularly a kind of high-precision multi-path temperature collecting device using in building structure fire resistance test.

Background technology

Existing temperature acquisition method or device, generally to use recording instrument without paper or data acquisition unit, the in the situation that of less in collection point, can meet the demands, but for building structure fire resistance test, in order to reflect the truth in temperature field, need multi-point to be gathered, number of channels requires to reach more than 200 simultaneously. Realize at present multichannel temperature collection and mainly contain two kinds of modes, the one, use many recording instrument without paper, the 2nd, use large-scale signal acquiring system. Use when many recording instrument without paper, need to repeat procuring equipment increases cost, also can cause temperature acquisition inaccurate because of the difference of distinct device simultaneously, and every equipment connects by interface independently the unified analyzing and processing that computer is also unfavorable for data; Use that large-scale signal acquiring system exists that equipment purchasing cost is high, the order cycle time is long and very inconvenience of maintenance. Therefore there is the problem that acquisition precision is not high, separate unit collecting device port number is very few or acquisition system cost is high in existing temperature acquisition method or device, the requirement that all can not meet the test of building structure fire resistance test or promote.

In a word, there is the problem that acquisition precision is not high, single equipment port number is very few or acquisition system cost is high in existing signal acquisition method and device, cannot carry out accurately, stablize collection and promote on a large scale.

Summary of the invention

In view of the deficiency that existing temperature collecting device exists, the utility model provides a kind of high-precision multi-path temperature collecting device. Device overall cost cost is 1/20 of current import large data harvester cost, and single channel acquisition hardware cost is lower than 50 yuan, and maximum number of channels is 256 passages.

The utility model for achieving the above object, the technical scheme adopting is: a kind of high-precision multi-path temperature collecting device, is characterized in that: comprise USB interface, USB-RS485 signal adapter, constant voltage dc source, K type Thermocouple Temperature Acquisition module and holding wire end resistance; 16 described 16 passage RS482 signal output K type Thermocouple Temperature Acquisition module composition K type Thermocouple Temperature Acquisition module groups, in each 16 passage RS482 signal output K type Thermocouple Temperature Acquisition modules, 16 channel temperatures are installed and are gathered terminals, 16 16 passage RS482 signal output K type Thermocouple Temperature Acquisition module by signal output parallel connections, be connected on USB-RS485 signal adapter signal input part by holding wire, the end of holding wire connects a holding wire end resistance, and USB-RS485 signal adapter signal output part is connected with USB interface; The power end parallel connection of 16 16 passage RS482 signal output K type Thermocouple Temperature Acquisition modules, is connected and accepts power supply with the DC output end of constant voltage dc source 4 by direct current supply line 7.

The beneficial effects of the utility model are: by by high acquisition precision, port number is more, good stability and lower-cost 16 passage RS485 signals output K type Thermocouple Temperature Acquisition modules are set up into the capable Thermocouple Temperature Acquisition module of K group, realize the temperature acquisition problem that solves multi-measuring point with the cost with lower, and possess good autgmentability, also there is higher acquisition precision and stability simultaneously. This device, for building structure fire resistance test, has met the requirement that this type of test requirements document multiple spot simultaneous temperature is measured. Device overall cost cost is 1/20 of current import large data harvester cost, and single channel acquisition hardware cost is lower than 50 yuan, and maximum number of channels is 256 passages. Adopt this device can solve with lower cost the temperature acquisition problem of multi-measuring point, and possess good autgmentability, also there is higher acquisition precision and stability simultaneously. This device overall structure is reliable, and principle is clear and definite, workable.

Brief description of the drawings

Fig. 1 is schematic diagram of the present utility model.

Detailed description of the invention

Understand the utility model for clearer, describe in detail below in conjunction with drawings and Examples.

As shown in Figure 1, a kind of high-precision multi-path temperature collecting device, comprises usb 1, USB-RS485 signal adapter 2, constant voltage dc source 4, K type Thermocouple Temperature Acquisition module 6 and holding wire end resistance 8.

Operation principle:

Form K type Thermocouple Temperature Acquisition module group by 16 16 passage RS485 signal output K type Thermocouple Temperature Acquisition module 6 signal output parts parallel connections, be connected and carry out signal transmission with USB-RS485 signal adapter 2 signal input parts by signal line line 3; Between two holding wire ends, connect a holding wire end resistance 8, for the resistance of matched signal line, ensure stable signal transmission; 16 channel temperatures of the upper installation of each DAS-TC16K type Thermocouple Temperature Acquisition module 6-1～6-16 gather terminals 9, and each 16 channel temperatures gather on terminals 9 and can connect 16 thermocouples and its data are gathered. The parallel connection of 16 DAS-TC16K type Thermocouple Temperature Acquisition module 6-1～6-16 power ends, be connected with the DC output end of constant voltage dc source 4 by direct current supply line 7 and accept constant voltage dc source 4 and power, the input of constant voltage dc source 4 connects AC power by 220V power line 5. 16 DAS-TC16K type Thermocouple Temperature Acquisition module 6-1～6-16 have formed K type Thermocouple Temperature Acquisition module group 6 together, the signal input output end of each module is by holding wire 3 parallel connections, feeder ear is by direct current supply line 7 parallel connections, the K type that the is thermocouple standard mV signal of each module collection, be converted to RS485 standard signal by the converter of inside modules, output in USB-RS485 signal adapter 2 by holding wire 3; 256 thermocouple RS485 standard signals of K type Thermocouple Temperature Acquisition module group collection are converted to the model that meets USB standard by special chip by USB-RS485 signal adapter 2, and be connected with computer by usb 1.

Device can connect 256 K type thermocouples and to its data acquisition simultaneously.

According to the above description, can realize the utility model scheme in conjunction with industry actual conditions.

Claims

1. a high-precision multi-path temperature collecting device, is characterized in that: comprise USB interface (1), USB-RS485 signal adapter (2), constant voltage dc source (4), K type Thermocouple Temperature Acquisition module (6) and holding wire end resistance (8), 16 described 16 passage RS482 signal output K type Thermocouple Temperature Acquisition module (6) composition K type Thermocouple Temperature Acquisition module groups, 16 channel temperatures of the upper installation of each 16 passage RS482 signal output K type Thermocouple Temperature Acquisition modules (6) gather terminals (9), 16 16 passage RS482 signal output K type Thermocouple Temperature Acquisition module (6) signal output part parallel connections, be connected on USB-RS485 signal adapter (2) signal input part by holding wire (3), the end of holding wire (3) connects a holding wire end resistance (8), USB-RS485 signal adapter (2) signal output part is connected with USB interface (1), the power end parallel connection of 16 16 passage RS482 signal output K type Thermocouple Temperature Acquisition modules (6), is connected and accepts power supply with the DC output end of constant voltage dc source (4) by direct current supply line (7).