CN110132449A - A kind of temperature monitoring method at equipment position - Google Patents

A kind of temperature monitoring method at equipment position Download PDF

Info

Publication number
CN110132449A
CN110132449A CN201910413997.6A CN201910413997A CN110132449A CN 110132449 A CN110132449 A CN 110132449A CN 201910413997 A CN201910413997 A CN 201910413997A CN 110132449 A CN110132449 A CN 110132449A
Authority
CN
China
Prior art keywords
temperature
signal
equipment
monitoring method
temperature sensor
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201910413997.6A
Other languages
Chinese (zh)
Inventor
刘肇捷
冉尧平
钟林宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Aircraft Industrial Group Co Ltd
Original Assignee
Chengdu Aircraft Industrial Group Co Ltd
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.)
Filing date
Publication date
Application filed by Chengdu Aircraft Industrial Group Co Ltd filed Critical Chengdu Aircraft Industrial Group Co Ltd
Priority to CN201910413997.6A priority Critical patent/CN110132449A/en
Publication of CN110132449A publication Critical patent/CN110132449A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02Means for indicating or recording specially adapted for thermometers
    • G01K1/024Means for indicating or recording specially adapted for thermometers for remote indication
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00Thermometers specially adapted for specific purposes
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16Measuring 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K2219/00Thermometers with dedicated analog to digital converters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

The invention discloses a kind of temperature monitoring methods at equipment position, comprising the following steps: a, the mounting temperature sensor in equipment;B, temperature sensor detection device needs to monitor the temperature value at position;C, temperature transmitter module is amplified and is calculated to electric signal;D, multi channel testing controller is acquired and handles to analog signals;E, the digital quantity signal that driving device exports multi channel testing controller is converted or is amplified;F, digital quantity signal is transferred to control system by driving device.By the operating condition for monitoring blower or each position of motor in time; it can guarantee the failure in first time discovering device; and alarm signal is issued before problem worse; it reminds and needs the position overhauled or the position needed replacing; it will cause the equipment of heavy losses and its important especially for shutting down in operation, avoid valuable part rejection.

Description

A kind of temperature monitoring method at equipment position
Technical field
The invention belongs to the monitoring of equipment position and informationization technology fields, and in particular to a kind of temperature monitoring at equipment position Method.
Background technique
It is a big modeling with whole heating system as the autoclave of aviation composite product main production equipments Pressure is the structure of container, nose modeling hot pressing bacterium, and since autoclave is a pressure vessel, its common structure is an end seal It closes, the cylindrical body that the other end opens the door provides necessary heat and pressure for the compacting and solidification of advanced composite material moral part.
But autoclave production task is very heavy, the part of processing value is very high, at present its critical component 110kW blower or For motor every three months to 1 year, blower motor always will appear exception, if there is part just blower during processing in the tank Failure will lead to the part rejection for being up to millions of values.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of temperature monitoring method at equipment position, can monitor in time The operating condition at blower or each position of motor, can guarantee the failure in first time discovering device, and before problem worse Issue alarm signal.
The present invention is achieved by the following technical solutions.
A kind of temperature monitoring method at equipment position, it is characterised in that: the following steps are included:
A, the mounting temperature sensor in equipment;
B, temperature sensor detection device needs to monitor the temperature value at position, and temperature value is converted to electric signal;
C, temperature transmitter module is amplified and is calculated to electric signal, and the general analog quantity of electric signal conversion electrical system is believed Number;
D, multi channel testing controller is acquired and handles to analog signals, after reaching preset value, exports corresponding number Amount signal feeds back to control system and host computer;
E, the digital quantity signal that driving device exports multi channel testing controller is converted or is amplified;
F, digital quantity signal is transferred to control system by driving device.
The general analog signals of the electrical system are 4-20mA.
The general analog signals of the electrical system are 0.1-10V.
The temperature value at multiple positions of the temperature sensor detection device.
The signal that temperature sensor is passed to is handled and is converted by the temperature transmitter module, by temperature sensor Signal is converted into analog signals, and temperature transmitter module is integrated in multi channel testing controller.
The multi channel testing controller acquires upper machine information by industrial communication interface.
The host computer is electric current relay, intelligent circuit board, PLC or industrial PC.
The equipment is blower or motor.
Bring beneficial effect of the present invention has.
1, it is detected by temperature of the temperature sensor to equipment, acquires and analyze data-signal, when blower or motor Automatic alarm after operation is broken down, timely the exception and potential faults of discovering device, facilitate plant maintenance personnel to adopt in time Measure is taken, is removed a hidden danger, avoids that accident occurs, can monitor the operating condition of blower or each position of motor in time, it can Guarantee the failure in first time discovering device, and issue alarm signal before problem worse, reminds the position for needing to overhaul Or the position needed replacing, it will cause the equipment of heavy losses and its important especially for shutting down in operation, avoid valuable Part rejection.
2, implement simple: the equipment acquired for needs, electric control system are not required to do big change: major loop is without doing Any change;Control loop only needs to do simple change to control route or control software, that is, is able to achieve alarm, cutting function Energy.
3, temperature acquisition system at low cost, relative to one alarm table of tradition for an alarm temperature, such method It only needs an inspection controller can be realized and monitoring is acquired to multiple temperature signals, and patch can be used in temperature sensor Resistance, domestic precision ± 0.5% of meter selection and its above road inspection controller can be met the requirements.
4, significant effect: can simultaneously monitoring device multiple points, can first time discovering device exception and Potential faults facilitate plant maintenance personnel to take timely measure, remove a hidden danger, and avoid that accident occurs, and seem outstanding using this method It is important.
5, by control system and host computer carry out data real-time data record, audible alarm, light alarm, text prompt, It can carry out network remote and send information.
Detailed description of the invention
Fig. 1 is flow diagram of the invention.
Fig. 2 is connection schematic diagram of the invention.
Appended drawing reference: 1, temperature sensor, 2, temperature transmitter module, 3, multi channel testing controller, 4, driving device, 5, Equipment, 6, control system, 7, host computer.
Specific embodiment
Embodiment 1
As shown in Fig. 1 to 2, a kind of temperature monitoring method at equipment position, it is characterised in that: the following steps are included:
A, the mounting temperature sensor 1 in equipment 5;
B, 1 detection device 5 of temperature sensor needs to monitor the temperature value at position, and temperature value is converted to electric signal;
C, temperature transmitter module 2 is amplified and is calculated to electric signal, by the analog quantity that electric signal conversion electrical system is general Signal;
D, multi channel testing controller 3 is acquired and handles to analog signals, after reaching preset value, exports corresponding number Amount signal feeds back to control system 6 and host computer 7;
E, the digital quantity signal that driving device 4 exports multi channel testing controller 3 is converted or is amplified;
F, digital quantity signal is transferred to control system 6 by driving device 4.
Reload temperature sensor 1 is responsible for the temperature that detection device needs to monitor position on equipment key position or Primary Component Angle value, and by temperature value, it is converted to the identifiable electric signal of temperature transmitter module 2, is transferred to temperature transmitter module 2, temperature Degree transmitter module (is responsible for that the signal of temperature sensor input 1 is amplified and calculated, is 4-20mA or 0- by signal switch The electrical systems master die analog quantity signal such as 10V, multi channel testing controller 3 are acquired and handle to temperature simulation amount signal, and Repeating query is carried out to temperature to show, after reaching preset value (minimum or peak), is issued corresponding digital quantity signal and is sent to Driving device 4, driving device 4 by being converted or being amplified to digital quantity signal to drive warning device, cut off the power, According to the difference of measurement point position, 1 to 16 monitoring temperature point can choose.It can choose one or more temperature sensors 1, it needs to select corresponding temperature transmitter module 2 according to the temperature sensor of selection, or select integrated temperature transmitter mould The analog output line of temperature transmitter module is accessed multi channel testing by the multi channel testing controller 3 of block, temperature transmitter module 2 On the channel of controller 3, setting multi channel testing controller 3 is that repeating query display pattern or single channel are shown, and its alarm is arranged Parameter is detected by temperature of the temperature sensor 1 to equipment 5, acquires and analyze data-signal, when blower or motor operation Automatic alarm after failure, timely the exception and potential faults of discovering device, facilitate plant maintenance personnel to take in time and arrange It applies, removes a hidden danger, avoid that accident occurs, can monitor the operating condition of blower or each position of motor in time, can guarantee In the failure of first time discovering device, and alarm signal is issued before problem worse, remind the position for needing to overhaul or need The position to be replaced will cause the equipment of heavy losses and its important especially for shutting down in operation, avoid valuable zero Part is scrapped.
Embodiment 2
As shown in Fig. 1 to 2, a kind of temperature monitoring method at equipment position, it is characterised in that: the following steps are included:
A, the mounting temperature sensor 1 in equipment 5;
B, 1 detection device 5 of temperature sensor needs to monitor the temperature value at position, and temperature value is converted to electric signal;
C, temperature transmitter module 2 is amplified and is calculated to electric signal, by the analog quantity that electric signal conversion electrical system is general Signal;
D, multi channel testing controller 3 is acquired and handles to analog signals, after reaching preset value, exports corresponding number Amount signal feeds back to control system 6 and host computer 7;
E, the digital quantity signal that driving device 4 exports multi channel testing controller 3 is converted or is amplified;
F, digital quantity signal is transferred to control system 6 by driving device 4.
The general analog signals of the electrical system are 4-20mA.
The general analog signals of the electrical system are 0.1-10V.
The temperature value at multiple positions of 1 detection device 5 of temperature sensor.
The signal that temperature sensor 1 is passed to is handled and is converted by the temperature transmitter module 2, by temperature sensor 1 signal is converted into analog signals, and temperature transmitter module 2 is integrated in multi channel testing controller 3.
The multi channel testing controller 3 acquires 7 information of host computer by industrial communication interface.
The host computer 7 is electric current relay, intelligent circuit board, PLC or industrial PC.
The equipment 5 is blower or motor.
Reload temperature sensor 1 is responsible for the temperature that detection device needs to monitor position on equipment key position or Primary Component Angle value, temperature sensor output signal, and by temperature value, it is converted to the identifiable electric signal of temperature transmitter module 2, transmission To temperature transmitter module 2, temperature transmitter module 2(is responsible for that the signal of temperature sensor input 1 is amplified and calculated, It is the electrical systems master die analog quantity signals such as 4-20mA or 0-10V by signal switch, multi channel testing controller 3 is to temperature simulation amount Signal is acquired and handles, and carries out repeating query to temperature and show, after reaching preset value (minimum or peak), issues phase The alarm switch signal answered sends driving device 4 to, at the same multi channel testing controller 3 acquired by industrial communication interface it is upper 7 information of machine is transmission actual temperature value in industrial communication, and driving device 4 to digital quantity signal by being converted or being amplified use To drive warning device, cut off the power, the incoming control signal of driving device 4 is to control system 6, not according to measurement point position Together, it can choose 1 to 16 monitoring temperature point.It can choose one or more temperature sensors 1, need according to selection Temperature sensor selects corresponding temperature transmitter module 2, or selects the multi channel testing control of integrated temperature transmitter module Instrument 3, temperature transmitter module 2 access the analog output line of temperature transmitter module on the channel of multi channel testing controller 3, Setting multi channel testing controller 3 is that repeating query display pattern or single channel are shown, and its alarm parameters is arranged, and passes through temperature sensing Device 1 detects the temperature of equipment 5, acquires and analyze data-signal, reports automatically after blower or motor operation failure Alert, timely the exception and potential faults of discovering device, facilitate plant maintenance personnel to take timely measure, remove a hidden danger, avoid Generation accident can monitor the operating condition of blower or each position of motor in time, can guarantee that discovery is set in first time Standby failure, and alarm signal is issued before problem worse, it reminds and needs the position overhauled or the position needed replacing, especially It is that will cause the equipment of heavy losses and its important for shutting down in operation, avoids valuable part rejection.
Implement simple: the equipment acquired for needs, electric control system are not required to do big change: major loop is without appointing What is changed;Control loop only needs to do simple change to control route or control software, that is, is able to achieve alarm, cutting function.
At low cost, relative to a traditional alarm table for the temperature acquisition system of an alarm temperature, such method is only It needs an inspection controller can be realized and monitoring is acquired to multiple temperature signals, and patch electricity can be used in temperature sensor Resistance, domestic precision ± 0.5% of meter selection and its above road inspection controller can be met the requirements.
Significant effect: can simultaneously monitoring device multiple points, can first time discovering device exception and therefore Hinder hidden danger, facilitates plant maintenance personnel to take timely measure, remove a hidden danger, avoid that accident occurs, seemed especially using this method It is important.
By control system 6 and upper 7 machine carry out data real-time data record, audible alarm, light alarm, text prompt, It can carry out network remote and send information.
The patch type temperature sensing of other brands also can be used in the model ZW/K-201SF4 of the temperature sensor 1 Device, it is desirable that temperature sensor 1, which belongs to thermoelectricity occasionally thermal resistance type power supply and signal wire for patch type, need to match site environment temperature.
The model OHR-213 of the temperature transmitter module 2, input K type thermocouple signal, export 4-20mA or its His temperature transmitter module, can receive the input signal of thermoelectricity occasionally thermal resistance;4-20mA can be converted by input signal Analog signals.
The model SWP-LCD-MD81480-12-W-S of the multi channel testing controller 3, can be used other brand functions Similar multiplex inspector, basic function need to include multi-pass channel receiving signal, with 6 or more channels;Each channel reception Universal Die analog quantity signal: 4-20mA, 0-10V;With RS485 communication interface, the data that all channels acquire can be spread out of;Tool There is warning output point;Low price, low precision.
Model JZX-22F (D) -36VAC ~ 3Z6+CZY11A of the driving device 4, or use other electrical first devices Part, it is desirable that: signal extension or amplification.
The control system 6 can use it using TL-702LI/r31 alarm lamp and ND16-22BS/4 AC220V indicator light Its onsite alarming and indicator light replace, it is desirable that: indicative function is eye-catching;Alarm lamp needs band buzzer or other auditory tone cues.
The model IPC-820/CF of the host computer 7 can be replaced with other brand industrial personal computers, as equipment carries host computer An auxiliary function can directly be added.
The specific embodiment of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously The limitation to the application protection scope therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art For, under the premise of not departing from technical scheme design, various modifications and improvements can be made, these belong to this The protection scope of application.

Claims (8)

1. a kind of temperature monitoring method at equipment position, it is characterised in that: the following steps are included:
A, the mounting temperature sensor (1) on equipment (5);
B, temperature sensor (1) detection device (5) needs to monitor the temperature value at position, and temperature value is converted to electric signal;
C, temperature transmitter module (2) is amplified and is calculated to electric signal, by the simulation that electric signal conversion electrical system is general Measure signal;
D, multi channel testing controller (3) is acquired and handles to analog signals, after reaching preset value, exports corresponding number Word amount signal feeds back to control system (6) and host computer (7);
E, the digital quantity signal that driving device (4) exports multi channel testing controller (3) is converted or is amplified;
F, digital quantity signal is transferred to control system (6) by driving device (4).
2. a kind of temperature monitoring method at equipment position as described in claim 1, it is characterised in that: the electrical system is general Analog signals be 4-20mA.
3. a kind of temperature monitoring method at equipment position as described in claim 1, it is characterised in that: the electrical system is general Analog signals be 0.1-10V.
4. a kind of temperature monitoring method at equipment position as described in claim 1, it is characterised in that: the temperature sensor (1) temperature value at multiple positions of detection device (5).
5. a kind of temperature monitoring method at equipment position as described in claim 1, it is characterised in that: the temperature transmitter mould The signal that temperature sensor (1) is passed to is handled and is converted by block (2), and the signal of temperature sensor (1) is converted into simulating Signal is measured, temperature transmitter module (2) is integrated in multi channel testing controller (3).
6. a kind of temperature monitoring method at equipment position as described in claim 1, it is characterised in that: the multi channel testing control Instrument (3) acquires host computer (7) information by industrial communication interface.
7. a kind of temperature monitoring method at equipment position as described in claim 1, it is characterised in that: the host computer (7) is Electric current relay, intelligent circuit board, PLC or industrial PC.
8. a kind of temperature monitoring method at equipment position as described in claim 1, it is characterised in that: the equipment (5) is wind Machine or motor.
CN201910413997.6A 2019-05-17 2019-05-17 A kind of temperature monitoring method at equipment position Pending CN110132449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910413997.6A CN110132449A (en) 2019-05-17 2019-05-17 A kind of temperature monitoring method at equipment position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910413997.6A CN110132449A (en) 2019-05-17 2019-05-17 A kind of temperature monitoring method at equipment position

Publications (1)

Publication Number Publication Date
CN110132449A true CN110132449A (en) 2019-08-16

Family

ID=67575107

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910413997.6A Pending CN110132449A (en) 2019-05-17 2019-05-17 A kind of temperature monitoring method at equipment position

Country Status (1)

Country Link
CN (1) CN110132449A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110568812A (en) * 2019-09-10 2019-12-13 满誉(福建)制鞋机械有限公司 PLC-based multi-path temperature centralized inspection device for shoe machine
CN110631722A (en) * 2019-09-27 2019-12-31 共享智能铸造产业创新中心有限公司 Multi-temperature measurement gun single transmitter system and working method thereof
CN110967121A (en) * 2019-12-12 2020-04-07 大连大学 Matrix type three-dimensional temperature test monitoring system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005166055A (en) * 2003-12-02 2005-06-23 Exon Science Inc Control system and monitoring apparatus for reaction plant
CN2710988Y (en) * 2004-06-09 2005-07-20 银川机务段科学技术协会科技服务部 Intelligent control system for air-cooling system of electric locomotive
CN201314846Y (en) * 2008-12-25 2009-09-23 李峰 Temperature inspecting instrument
CN102513377A (en) * 2011-12-31 2012-06-27 太原重工股份有限公司 Motor monitoring system of three-roller continuous tube-rolling mill
CN102589726A (en) * 2012-02-23 2012-07-18 中冶南方工程技术有限公司 Temperature protecting polling device for water pump motor
CN202523300U (en) * 2012-03-20 2012-11-07 浙江同济科技职业学院 Temperature patrol measurement simulator for hydropower station hydraulic generator set
CN203616007U (en) * 2013-06-28 2014-05-28 国家电网公司 Automatic temperature patrolling and measuring device for transformer station
CN106227264A (en) * 2016-08-24 2016-12-14 成都飞机工业(集团)有限责任公司 A kind of salt bath furnace temperature control system
CN208752431U (en) * 2018-10-25 2019-04-16 云南驰宏锌锗股份有限公司 A kind of interlock control system of large fan

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005166055A (en) * 2003-12-02 2005-06-23 Exon Science Inc Control system and monitoring apparatus for reaction plant
CN2710988Y (en) * 2004-06-09 2005-07-20 银川机务段科学技术协会科技服务部 Intelligent control system for air-cooling system of electric locomotive
CN201314846Y (en) * 2008-12-25 2009-09-23 李峰 Temperature inspecting instrument
CN102513377A (en) * 2011-12-31 2012-06-27 太原重工股份有限公司 Motor monitoring system of three-roller continuous tube-rolling mill
CN102589726A (en) * 2012-02-23 2012-07-18 中冶南方工程技术有限公司 Temperature protecting polling device for water pump motor
CN202523300U (en) * 2012-03-20 2012-11-07 浙江同济科技职业学院 Temperature patrol measurement simulator for hydropower station hydraulic generator set
CN203616007U (en) * 2013-06-28 2014-05-28 国家电网公司 Automatic temperature patrolling and measuring device for transformer station
CN106227264A (en) * 2016-08-24 2016-12-14 成都飞机工业(集团)有限责任公司 A kind of salt bath furnace temperature control system
CN208752431U (en) * 2018-10-25 2019-04-16 云南驰宏锌锗股份有限公司 A kind of interlock control system of large fan

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张宏伟等: "《PLC电气控制技术》", 1 October 2018, 中国矿业大学出版社 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110568812A (en) * 2019-09-10 2019-12-13 满誉(福建)制鞋机械有限公司 PLC-based multi-path temperature centralized inspection device for shoe machine
CN110631722A (en) * 2019-09-27 2019-12-31 共享智能铸造产业创新中心有限公司 Multi-temperature measurement gun single transmitter system and working method thereof
CN110967121A (en) * 2019-12-12 2020-04-07 大连大学 Matrix type three-dimensional temperature test monitoring system

Similar Documents

Publication Publication Date Title
CN110132449A (en) A kind of temperature monitoring method at equipment position
CN203798913U (en) Intelligent multichannel heater operating state and current monitoring system
CN110429003B (en) Transmitter for on-line check density relay and implementation method and system thereof
CN110444442A (en) A kind of teletransmission gas density relay system and its method of calibration
CN110426628B (en) Transmitter and system for on-line checking gas density relay
CN211426159U (en) Gas density monitoring device and monitoring system for realizing maintenance-free density relay
CN211088161U (en) Transmitter and monitoring system for on-line density checking relay
CN204286646U (en) Main transformer of transformer substation thermometric loop fault detecting device
CN209181830U (en) Wisdom Electrical Safety sensing terminal and wisdom electricity system
CN201555911U (en) On-line monitoring device of intelligent arrester
CN205749513U (en) A kind of transformer insulation oil on-line monitoring system based on PIC single chip microcomputer
CN110429002A (en) A kind of gas density relay of insulation performance self-test
CN105137954A (en) Real-time on-line temperature and humidity monitoring system of transformer substation
CN101625564B (en) Method and system for automatic control and automatic warning
CN210722875U (en) Remote gas density relay system
CN110411891B (en) On-site detection device, system and method for realizing maintenance-free gas density relay
CN210863966U (en) Electrical equipment and system for realizing maintenance-free density relay
CN203929246U (en) Substation equipment temperature-detecting device
CN203422686U (en) Sterilization machine temperature monitoring system
CN213579768U (en) Kiln non-contact infrared temperature measurement alarm monitoring system based on PLC
CN113568355A (en) Production line parameter monitoring method and system
CN210668213U (en) Gas density relay and monitoring system with insulation performance self-testing function
CN110426313B (en) Gas density relay with circuit diagnosis function and monitoring system
CN110491723B (en) Gas density relay with contact state monitoring function and monitoring system
CN103837258A (en) Temperature monitoring system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190816