KR20170092889A - Apparatus for controlling temperature - Google Patents

Apparatus for controlling temperature Download PDF

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Publication number
KR20170092889A
KR20170092889A KR1020160014129A KR20160014129A KR20170092889A KR 20170092889 A KR20170092889 A KR 20170092889A KR 1020160014129 A KR1020160014129 A KR 1020160014129A KR 20160014129 A KR20160014129 A KR 20160014129A KR 20170092889 A KR20170092889 A KR 20170092889A
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KR
South Korea
Prior art keywords
temperature
unit
temperature measuring
analog
input
Prior art date
Application number
KR1020160014129A
Other languages
Korean (ko)
Inventor
김재국
Original Assignee
엘에스산전 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to KR1020160014129A priority Critical patent/KR20170092889A/en
Publication of KR20170092889A publication Critical patent/KR20170092889A/en

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1917—Control of temperature characterised by the use of electric means using digital means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
    • G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

The present invention relates to a temperature controlling apparatus and, more specifically, to a temperature controlling apparatus for insulating a temperature measuring unit from a multiplexor or insulating input units from each other. The temperature controlling apparatus according to an embodiment of the present invention comprises: one or more input units measuring temperature; an analog-to-digital converter receiving analog signals from the one or more input units and converting the analog signals into digital signals; a controller receiving the digital signals from the analog-to-digital converter to selectively control the one or more input units; and an output unit receiving output signals from the controller and outputting the output signals. The input unit includes: a first temperature measuring unit; a second temperature measuring unit; a multiplexor; and a first insulating unit insulating the first temperature measuring unit or the second temperature measuring unit from the multiplexor. The present invention insulates the temperature measuring unit from the multiplexor, thereby protecting the multiplexor and the analog-to-digital converter.

Description

[0001] APPARATUS FOR CONTROLLING TEMPERATURE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control apparatus, and more particularly, to a temperature control apparatus for insulating a temperature measuring unit and a multiplexer or insulating each input unit.

PLC (Programmable Logic Controller) is a sequence control device similar to a computer that performs functions such as input, output, memory, and operation. PLCs are characterized by high reliability, simple control software, easy maintenance, and low cost. Therefore, PLC is used in many fields, and its application field is used for factory automation of large, medium and small scale, surveillance control of gas pipeline of pipeline, and various sequence control.

The PLC can change the program as needed, and can be equipped with modules with various functions. The modules may be, for example, a communication module, a special module for processing analog input / output, a positioning module, and a temperature measurement module for measuring temperature. Among the above-described modules, the temperature measurement module is a module for measuring temperature by contacting two different metals and applying a temperature change to the contact portions.

The temperature measurement module is widely used for automation of various facilities, quality control, unmanned operation, etc. The temperature measurement module plays an important role mainly for quality control, facility condition management and facility operation decision. Therefore, depending on the accuracy of the temperature measurement module or the status monitoring, it has a decisive influence on the productivity, the quality of the product, the operation rate of the equipment, and the cost.

Although the function of the temperature measurement module is very important as described above, the conventional temperature measurement module is not insulated between the respective components, and thus noise is generated between the components. Moreover, it is difficult to measure the temperature accurately due to noise generation, and there is a risk that the configuration may explode if the noise is large. In addition, since the conventional temperature measurement module can not simultaneously receive other types of temperature sensor signals, it is necessary to manufacture a temperature measurement module for each temperature sensor, thereby increasing manufacturing cost and system configuration cost.

An object of the present invention is to protect a multiplexer and an analog-to-digital converter by insulating a temperature measuring unit and a multiplexer.

It is another object of the present invention to reduce noise between input parts by insulating each input part and to prevent failure of the input part due to noise.

Another object of the present invention is to provide a user with convenience by receiving signals from other types of temperature measuring units.

Further, the present invention aims to reduce the manufacturing cost and the system construction cost by controlling the plurality of input units by the control unit.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a temperature control apparatus including at least one input unit for measuring temperature, an analog-to-digital converter for receiving an analog signal from the at least one input unit and converting the analog signal into a digital signal, A first temperature measuring unit, a second temperature measuring unit, a first temperature measuring unit, a first temperature measuring unit, a second temperature measuring unit, a first temperature measuring unit, a second temperature measuring unit, And a first insulation part for insulating the first temperature measurement part or the second temperature measurement part and the multiplexer.

According to the present invention as described above, the multiplexer and the analog-to-digital converter are protected by insulating the temperature measuring unit and the multiplexer.

In addition, according to the present invention, there is an effect that the noise between the input units is reduced by insulating each input unit, and the failure of the input unit due to noise is prevented.

According to the present invention, there is an effect that convenience is provided to a user by receiving signals from other types of temperature measuring units.

In addition, according to the present invention, the control unit controls the plurality of input units, thereby reducing manufacturing cost and system configuration cost.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a temperature control apparatus according to an embodiment of the present invention. Fig.
2 is a graph showing the temperature change according to an embodiment of the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements.

1 is a view showing a temperature control device according to an embodiment of the present invention.

1, a temperature control apparatus 100 according to an exemplary embodiment of the present invention includes input units 110-1 and 110-N, an analog-to-digital converter 120, a controller 130, and an output unit 140 And the like.

The temperature control device 100 shown in Fig. 1 is according to one embodiment, and the constituent elements thereof are not limited to the embodiment shown in Fig. 1, and some components may be added, changed or deleted have.

Referring to FIG. 1, a process of measuring and controlling temperature by the temperature control apparatus 100 according to an embodiment of the present invention will be described. The (+) signal of the first temperature measuring units 111-1 and 111-N is connected to the second terminals 114-1 and 114-N, 115-N. The (A +) signal of the second temperature measuring units 112-1 and 112-N is connected to the first terminals 113-1 and 113-N, and the (B +) signal is supplied to the second terminals 114-1, 114-N. Also, the (B-) signals of the second temperature measuring units 112-1 and 112-N are connected to the third terminals 115-1 and 115-N. The temperatures measured by the first temperature measuring units 111-1 and 111-N and the second temperature measuring units 112-1 and 112-N are input to the insulating units 116-1 and 116-N.

At this time, the control unit 130 transmits control signals to the first insulation units 116-1 and 116-N, and the first insulation units 116-1 and 116-N of the input units 110-1 and 110- Can be sequentially controlled to the On state or the Off state, thereby controlling the N input units. For example, the control unit 130 turns on the first insulation unit 116-1 of the first input unit 110-1 to turn on the signal of the first input unit 110-1 to the first input unit 110-1 To the multiplexer 117-1. The control unit 130 turns on the first insulation unit 116-2 of the second input unit 110-2 to turn on the signal of the second input unit 110-2 to the multiplexer 117 of the second input unit 110-2 -2), and this process is sequentially performed for the remaining input units 110-1 and 110-N. The control unit 130 may sequentially control the input units 110-1 and 110-N or may select and control only the arbitrary input units 110-1 and 110-N, , 110-N may be simultaneously controlled.

The signals thus transmitted are transmitted to the analog-to-digital converter 120 through the multiplexers 117-1 and 117-N. At this time, the control unit 130 transmits the signals to the analog-to-digital converter 120 according to the sensor type and type set by the user, by the multiplexers 117-1 and 117-N of the input units 110-1 and 110- .

The analog-to-digital converter 120 converts the input temperature sensor signal into a digital signal and transmits the digital signal to the controller 130. The controller 130 controls the first temperature measuring unit 111-1 or 111-N or the second temperature measuring unit 112-1 or 112-N so that the measured temperature value measured by the first temperature measuring unit 111-1 or 111- can do.

Referring again to FIG. 1, one or more input units 110-1 and 110-N may measure the temperature. In one embodiment, the input units 110-1 and 110-N include first temperature measurement units 111-1 and 111-N, second temperature measurement units 112-1 and 112-N, a multiplexer 117- 1 and 117-N and the first temperature measuring units 111-1 and 111-N or the second temperature measuring units 112-1 and 112-N and the multiplexers 117-1 and 117-N And may include first insulation portions 116-1 and 116-N.

The first temperature measuring units 111-1 and 111-N may be a thermocouple temperature sensor and the second temperature measuring units 112-1 and 112-N may be a RTD temperature sensor. Conversely, the first temperature measuring units 111-1 and 111-N may be the RTD temperature sensors, the second temperature measuring units 112-1 and 112-N may be the thermocouple temperature sensors, 111-1 and 111-N and the second temperature measuring units 112-1 and 112-N are not limited thereto. Thermocouple temperature sensor has a wide range of temperature that can be measured, and RTD temperature sensor has advantage of high precision and low cost. The input units 110-1 and 110-N according to the embodiment of the present invention can receive the advantages of the above-described thermocouple temperature sensor and the advantages of the RTD temperature sensor by receiving different kinds of signals through the same input terminal have. In addition, the user does not need to use various kinds of temperature measuring devices, which is convenient.

The first insulation units 116-1 and 116-N are connected to the first temperature measurement units 111-1 and 111-N or the second temperature measurement units 112-1 and 112- 117-N. The second insulation unit 150 may isolate the analog-digital converter 120 and the controller 130 from each other. Meanwhile, the third insulation unit 160 may isolate the control unit 130 and the output unit 140 from each other. The first insulation units 116-1 and 116-N are connected to the first temperature measurement units 111-1 and 111-N or the second temperature measurement units 112-1 and 112- 117-N and the analog-to-digital converter 120 can be protected by isolating the multiplexers 117-1, 117-N. The second insulation part 150 may protect the analog digital converter 120 or the control part 130 by insulating the analog digital converter 120 and the control part 130. [ The third insulation unit 160 may protect the control unit 130 or the output unit 140 by insulating the control unit 130 and the output unit 140.

For example, when the internal insulation voltage of the first insulation portions 116-1 and 116-N is 100V and a voltage of 100V or more is applied through the temperature sensor, the first insulation portions 116-1 and 116- I never do that. Isolation voltage is the maximum voltage the insulation can tolerate. Since the first insulation portions 116-1 and 116-N do not transmit a signal higher than the breakdown voltage, it is possible to protect the configuration for receiving signals from the first insulation portions 116-1 and 116-N. Meanwhile, the first insulation portions 116-1 and 116-N may be photo-MOS relays or photocouplers, and the types of the first insulation portions 116-1 and 116-N are not limited thereto.

The photo-MOS relay is a device that transmits signals as an ultra-small semiconductor device. Generally, photo-coupler can only control DC, but photo-MOS relay can control both DC and AC. In addition, the photo-MOS relay has the advantage that the breakdown voltage is higher and the speed is faster than that of the photocoupler.

A photocoupler is a device that combines a light-emitting element and a light-receiving element and transmits a signal to the medium. The structure of the photocoupler is a structure in which the light emitting diode and the phototransistor are inserted in one package. It is widely used for electric noise elimination because it is electrically insulated between input and output. Photocouplers have lower dielectric strength and slower speed than PhotomOS relays, but have the advantage of lower cost.

The multiplexers 117-1 and 117-N input from the first temperature measuring units 111-1 and 111-N or the second temperature measuring units 112-1 and 112-N according to the signal of the controller 130 Lt; / RTI > For example, when the control signal of the controller 130 is RTD_Enable, the path of the RTD sensor signal may be connected to the ADC 120. On the other hand, when the control signal of the controller 130 is TC_Enable, the path of the thermocouple temperature sensor signal can be connected to the analog-to-digital converter 120. The multiplexers 117-1 and 117-N may simultaneously transmit signals received from the first temperature measuring units 111-1 and 111-N or the second temperature measuring units 112-1 and 112-N have.

The analog-to-digital converter 120 may receive an analog signal from one or more input units 110-1 and 110-N and convert the analog signal into a digital signal.

The control unit 130 may selectively receive one or more input units 110-1 and 110-N by receiving a digital signal from the analog-to-digital converter 120. [ For example, the control unit sequentially controls the N input units by controlling the insulation units 116-1 and 116-N of the input units 110-1 and 110-N sequentially in the On state or the Off state, Can be controlled. In addition, the control unit 130 transmits signals to the analog-to-digital converter 120 according to the sensor type and type set by the user, by the multiplexers 117-1 and 117-N of the respective input units 110-1 and 110- . The control unit 130 may control the first temperature measuring units 111-1 and 111-N or the second temperature measuring units 112-1 and 112-N. The first terminals 113-1 and 113- N, the second terminals 114-1 and 114-N, and the third terminals 115-1 and 115-N.

The control unit 130 may include a communication unit 131 for receiving the temperature value set by the user from the PLC CPU 300. [ The control unit 130 calculates the temperature value measured by the first temperature measuring units 111-1 and 111-N or the second temperature measuring units 112-1 and 112-N to be the temperature value set by the user And may further include a PID operation unit 132. The control unit 130 stores the temperature values measured by the first temperature measuring units 111-1 and 111-N or the second temperature measuring units 112-1 and 112-N or the temperature values set by the user And a memory 133 for storing data.

2 is a graph showing a temperature change according to an embodiment of the present invention.

Referring to FIG. 2, the communication unit 131 receives the temperature value 220 set by the user, and the memory 133 stores the temperature value. The memory 133 also stores the temperature values 210 measured by the first temperature measuring units 111-1 and 111-N or the second temperature measuring units 112-1 and 112-N. The PID calculator 132 calculates a temperature value 210 measured by the first temperature measuring units 111-1 and 111-N or the second temperature measuring units 112-1 and 112- (220). For example, when the temperature value set by the user is 50 ° C and the measured temperature measured by the first temperature measuring units 111-1 and 111-N or the second temperature measuring units 112-1 and 112- If the value is 100 ° C, the PID operation unit 132 calculates the adjustment value 230 until the measured temperature value 210 reaches the target temperature value 220.

The output unit 140 may receive the output signal from the control unit 130 and output the output signal. The output signal may be an adjustment value 230 calculated by the PID operation unit 132 or may be an adjustment value calculated by the first temperature measurement units 111-1 and 111-N or the second temperature measurement units 112-1 and 112- And may be the measured temperature value 210.

According to the present invention as described above, the multiplexer and the analog-to-digital converter are protected by insulating the temperature measuring unit and the multiplexer, and the isolation between the input units is reduced to reduce noise between the input units and prevent malfunction of the input unit due to noise have. In addition, according to the present invention, there is an effect that convenience is provided to a user by receiving analog signals from other types of temperature measuring units. In addition, according to the present invention, the control unit controls the plurality of input units, thereby reducing manufacturing cost and system configuration cost.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But the present invention is not limited thereto.

100: Temperature control device
110: input unit
120: Analog-to-digital converter
130:
140:

Claims (8)

At least one input for measuring temperature;
An analog-to-digital converter for receiving an analog signal from the at least one input unit and converting the analog signal to a digital signal;
A controller receiving the digital signal from the analog-to-digital converter and selectively controlling the at least one input unit; And
And an output unit for receiving and outputting an output signal from the control unit,
The input unit
A first temperature measuring unit, a second temperature measuring unit, a multiplexer, and a first insulating unit for insulating the first temperature measuring unit or the second temperature measuring unit and the multiplexer
Temperature control device.
The method according to claim 1,
The control unit
And controls the first insulation part to be in an On state or an Off state
Temperature control device.
The method according to claim 1,
The control unit
And the multiplexer controls the multiplexer to selectively receive the analog signal input from the first temperature measuring unit or the second temperature measuring unit
Temperature control device.
The method according to claim 1,
The control unit
A communication unit for receiving the temperature value set by the user from the PLC CPU
Comprising a temperature control device.
5. The method of claim 4,
The control unit
And a PID operation unit for calculating the temperature value measured by the first temperature measurement unit or the second temperature measurement unit to be the temperature value set by the user
Further comprising a temperature control device.
5. The method of claim 4,
The control unit
A memory for storing a temperature value measured by the first temperature measuring unit or the second temperature measuring unit or a temperature value set by the user,
Further comprising a temperature control device.
The method according to claim 1,

A second insulation unit that isolates the analog digital converter from the control unit or a third insulation unit that isolates the control unit from the output unit
Further comprising a temperature control device.
The method according to claim 1,
Wherein the first temperature measuring unit is a thermocouple temperature sensor,
Wherein the second temperature measuring unit is a temperature-measuring resistor temperature sensor.
KR1020160014129A 2016-02-04 2016-02-04 Apparatus for controlling temperature KR20170092889A (en)

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Publication Number Publication Date
KR20170092889A true KR20170092889A (en) 2017-08-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102179728B1 (en) * 2020-06-30 2020-11-17 (주)휴톤 Temperature monitoring system for cold storage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102179728B1 (en) * 2020-06-30 2020-11-17 (주)휴톤 Temperature monitoring system for cold storage

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