CN215114908U - Intelligent thermocouple signal input module - Google Patents
Intelligent thermocouple signal input module Download PDFInfo
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- CN215114908U CN215114908U CN202022848504.2U CN202022848504U CN215114908U CN 215114908 U CN215114908 U CN 215114908U CN 202022848504 U CN202022848504 U CN 202022848504U CN 215114908 U CN215114908 U CN 215114908U
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Abstract
The utility model discloses an intelligent thermocouple signal input module, keep apart thermocouple signal input channel, procedure processing unit, signal processing reference voltage, passageway instruction, cold junction compensation, F8 type module sharing part including ten ways. The utility model has the advantages that: the utility model discloses thermocouple signal input module passageway instructs simply directly perceived, and the configuration of passageway type is nimble, supports 8 kinds of warning ranks, supports outside cold junction and built-in cold junction compensation, supports the passageway and corrects, and high intellectuality has good economic benefits and social, is fit for using widely.
Description
Technical Field
The utility model relates to an analog input module specifically is an intelligent thermocouple signal input module, belongs to analog input module application technical field. And more particularly to an intelligent thermocouple signal input module for use in an industrial control system.
Background
In recent years, with the development of industrial computers, automation systems have been rapidly popularized, thermocouple signal input modules have been used in large quantities, and in the field of industrial control, temperature control and measurement have been important, and are fundamental environmental parameters and physical quantities representing the cooling degree of an object. Therefore, an intelligent thermocouple signal input module is proposed for the above situation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an intelligent thermocouple signal input module just for solving above-mentioned condition, the wiring is simple and convenient, the configuration is nimble, the individual is small and exquisite, can realize the thermocouple analog signal acquisition processing and the application of high intellectuality, can dispose in a flexible way and use in order to adapt to different market demands and technique to reach the intelligent effect of multichannel type.
The utility model discloses a following technical scheme realizes above-mentioned mesh, an intelligent thermocouple signal input module, including the module shell, the module shell is except that F8 type module shell commonness part still includes the passageway pilot lamp, module left side outside binding post, module right side outside binding post, including ten ways isolation thermocouple signal input channels that have ten ways interfaces, wherein one end is connected to outside thermocouple signal input interface, and the other end is connected the passageway type that is located the program processing unit inside and is selected the interface; the channel diagnosis interface of the program processing unit is connected with a common part of a F8 type module; the ten-way isolation thermocouple signal input channel is connected with a signal processing reference voltage, a channel indication and cold junction compensation, and the signal processing reference voltage is connected with a common part of an F8 type module.
Preferably, the ten isolated thermocouple signal input channel channels are electrically isolated, the signal adopts a photoelectric isolation sampling amplification circuit, and the interface adopts a wiring terminal.
Preferably, the intelligent thermocouple signal input module comprises ten-channel indicator lamps.
Preferably, the channel indication may indicate a channel signal status and a normal signal value, and may be used for a channel correction status indication.
Preferably, 8 alarm levels can be configured for ten isolated thermocouple signal input channels, channel correction supports ten-channel overall correction and single-channel individual correction, and external cold end and built-in cold end compensation are supported.
Preferably, the channel type selection comprises 0-45mV, K type thermocouple and E type thermocouple.
The utility model has the advantages that: the module channel is simple and visual in indication, flexible in channel type configuration, capable of supporting 8 alarm levels, supporting external cold end and built-in cold end compensation, supporting channel correction, highly intelligent, good in economic benefit and social benefit and suitable for popularization and use.
Drawings
Fig. 1 is a schematic block diagram of an intelligent thermocouple signal input module according to the present invention;
FIG. 2 is an electrical schematic diagram of two of the ten isolated thermocouple signal input channels of the intelligent thermocouple signal input module of FIG. 1;
FIG. 3 is an electrical schematic diagram of a signal processing reference voltage of the intelligent thermocouple signal input module of FIG. 1;
FIG. 4 is an electrical schematic diagram of cold end compensation of the intelligent thermocouple signal input module of FIG. 1;
in the figure: 1. ten isolated thermocouple signal input channels, 2, a program processing unit, 3, a signal processing reference voltage, 4, a channel indication, 5, cold junction compensation, and 6, F8 type module common parts.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the intelligent thermocouple signal input module 100 is a ten-circuit thermocouple signal input module, which includes: the device comprises a ten-way isolation thermocouple signal input channel 1, a program processing unit 2, a signal processing reference voltage 3, a channel indication 4, a cold junction compensation 5 and an F8 type module common part 6.
Referring to fig. 2, the ten-way isolated thermocouple signal input channel 1 has ten channels, signals of the ten channels are amplified by adopting photoelectric isolation sampling, and the channels are electrically isolated from each other. And one end of the thermocouple analog signal input interface is connected to the thermocouple analog signal input interface for leading in an external thermocouple analog signal. Each path of the ten paths of channels consists of 4 resistors R11, R12, R22 and R24, two capacitors C11 and C15, two signal-off electric isolation chips U5 and U13, a signal amplification chip U18 and two pins of a wiring terminal B. The circuit comprises a signal acquisition chip, a signal isolation chip, a signal amplification chip and a signal processing chip, wherein R11 and R12 are used for limiting current, R22 and R24 are used for accurately dividing voltage, C11 and C15 are used for acquiring voltage, a connecting terminal B is used for externally connecting an external thermocouple analog signal, the signal isolation chip U5 and the signal isolation chip U13 are used for photoelectric isolation of signals, the signal amplification chip U18 is used for amplifying the signals, and the external thermocouple analog signal and an internal signal are isolated, amplified and then sent to a CPU for processing.
The program processing unit 2 is a core processing component, which includes channel type selection, channel diagnosis. The channel type selection is used for selecting different channel types for the thermocouple analog signal channel, and the channel diagnosis is used for judging channel signal abnormity. And the channel type of the program processing unit 2 selects and collects the signals collected by the ten-way isolation thermocouple signal input channels, performs signal processing according to the selected signal type, detects the signals through channel diagnosis and records corresponding records.
Referring to fig. 3, the signal processing reference voltage 3 includes a reference voltage chip U8, two resistors R7 and R9, five capacitors C1, C2, C4, C13 and C20, and an inductor L1. The signal processing reference voltage 5 is a 2.5V reference voltage and thus generates a VB reference. A 24V to 2.5V voltage reference chip U8 provides a 2.5V reference voltage, L1 for digital to analog connection, C1, C2, C4, C13, and C20 for filter decoupling, and R7 and R9 for voltage division. And the signal processing reference voltage 5 provides reference voltage for the A/D detection module and provides reference voltage VB for thermocouple analog signal processing acquired by a channel.
Referring to fig. 4, the cold-end compensation 5 is composed of 6 resistors R8, R17, R45, R47, R50 and R51, a capacitor C40, and an operational amplifier U15, where R8 and R50 are used for voltage division, R45 and R47 are also used for voltage division, R17 and U15 are used for proportional operational amplifier, R51 is used for current limiting, and C40 is used for filtering decoupling. The cold end compensation 10 provides the thermocouple with a temperature signal at its cold end.
The connection relationship of the above parts is that one end of the ten-way isolated thermocouple signal input channel 1 is connected to an external thermocouple signal input interface for introducing an external thermocouple analog signal, and the other end is connected to the channel type selection of the program processing unit 2. The channel diagnosis interface of the program processing unit 2 is connected with the common part of the F8 type module; the ten-way isolation thermocouple signal input channel is connected with a signal processing reference voltage, a channel indication and cold junction compensation, and the signal processing reference voltage is connected with a common part of an F8 type module.
The intelligent thermocouple signal input module of the utility model can be matched with other F8 type modules to be used in the field of industrial control; the channel indication is simple and visual, has various functions, and can be configured into 0-45mV, K-type thermocouples and E-type thermocouples; 8 alarm levels are supported; external cold end and built-in cold end compensation are supported; supporting channel correction; the built-in signal processing reference voltage provides reference voltage for thermocouple signal processing; has the function of channel diagnosis.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. An intelligent thermocouple signal input module comprising a module housing (20), characterized by: the module shell (20) comprises a channel indicator lamp (7), a module left side external connecting terminal (8) and a module right side external connecting terminal (9) besides the common part of the F8 type module shell;
the module shell (20) is internally provided with ten thermocouple signal input channels (1) with ten interfaces, wherein one end of each thermocouple signal input channel is connected to an external thermocouple signal input interface, and the other end of each thermocouple signal input channel is connected with a channel type selection interface positioned in the program processing unit (2); the channel diagnosis interface of the program processing unit (2) is connected with a common part (6) of type F8 modules; the ten thermocouple signal input channels (1) are connected with a signal processing reference voltage (3), a channel indication (4) and a cold junction compensation (5), and the signal processing reference voltage (3) is connected with an F8 type module common part (6).
2. The intelligent thermocouple signal input module of claim 1, wherein: the ten thermocouple signal input channels (1) are electrically isolated, signals adopt a photoelectric isolation sampling amplification circuit, and interfaces adopt wiring terminals.
3. The intelligent thermocouple signal input module of claim 1, wherein: the intelligent thermocouple signal input module comprises ten-channel indicator lamps.
4. The intelligent thermocouple signal input module of claim 1, wherein: the channel indication (4) may indicate a channel signal status and a normal signal value, and may be used for a channel correction status indication.
5. The intelligent thermocouple signal input module of claim 1, wherein: the channel type selection comprises 0-45mV, K type thermocouple and E type thermocouple.
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| CN202022848504.2U CN215114908U (en) | 2020-12-02 | 2020-12-02 | Intelligent thermocouple signal input module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115452179A (en) * | 2022-11-07 | 2022-12-09 | 四川天利科技有限责任公司 | Multi-channel real-time self-calibration thermocouple cold end temperature measurement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115452179A (en) * | 2022-11-07 | 2022-12-09 | 四川天利科技有限责任公司 | Multi-channel real-time self-calibration thermocouple cold end temperature measurement method |
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Effective date of registration: 20230320 Address after: No. 5, Lutuan Road, South District of Future Science City, Changping District, Beijing, 102209 Patentee after: THE 6TH RESEARCH INSTITUTE OF CHINA ELECTRONICS CORPORATION, INTELLIGENT SYSTEM CO.,LTD. Address before: 100015 East 1st floor, M7 building, No. 1 Jiuxianqiao East Road, Chaoyang District, Beijing Patentee before: BEIJING HITACHI CONTROL SYSTEM Co.,Ltd. |