CN106200489B - A kind of Modified internal environment control unit and method for electric power equipment cabinet - Google Patents
A kind of Modified internal environment control unit and method for electric power equipment cabinet Download PDFInfo
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- CN106200489B CN106200489B CN201610693957.8A CN201610693957A CN106200489B CN 106200489 B CN106200489 B CN 106200489B CN 201610693957 A CN201610693957 A CN 201610693957A CN 106200489 B CN106200489 B CN 106200489B
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- 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
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- 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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2642—Domotique, domestic, home control, automation, smart house
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of Modified internal environment control units for electric power equipment cabinet, including first sensor, second sensor, the first controller, second controller, the first watchdog circuit, the second watchdog circuit, the first AND gate circuit, the second AND gate circuit, OR circuit, controlled device.The present invention also proposes a kind of Modified internal environment control method for electric power equipment cabinet, controller failure is detected by watchdog circuit, and mask the output of faulty equipment, another controller is allowed to obtain whole controls simultaneously, it solves conventional topologies control program, is likely to occur the technical issues of having been turned on the case where equipment can not turn off when equipment crashes.
Description
Technical field
The present invention relates to a kind of Modified internal environment control units and method for electric power equipment cabinet, belong to electric power equipment cabinet
Internal environment control technology field.
Background technique
It will be worked according to GB/T4798.5 " requirement of electric and electronic product application environment condition " any electronic product
Certain temperature humidity range.With carrying forward vigorously for smart grid in recent years, the kind of electric power equipment cabinet is more and more, in cabinet
Electronic component and component select increasingly precision, some components require application climatic environment very high.The normal reliable of power grid is transported
Row, by the stable operation of power equipment each in power grid.The reliable operation of the equipment such as protection, communication in electric power equipment cabinet, from not
Open certain work climatic environment.The temperature and humidity control system that environmental Kuznets Curves are adjusted is provided as equipment running in electric power equipment cabinet,
Its reliability should be higher than the protection in cabinet, communication apparatus, it is desirable that has lower failure rate.The system of cabinet environment control at present
The scheme that system works only with a controller, multiple blowers and heater only receive same control signal respectively and open or close
It closes.The maximum disadvantage of such configuration is exactly that can lead to environmental Kuznets Curves function once equipment or blower, heater break down to lose
Effect, reliability are lower.There are also fire safety evaluating hidden danger in the case of crashing simultaneously.
The cabinet control system of wind cooling temperature lowering and the heater heating generallyd use at present, You Yitai Temperature and Humidity Control
Device, multiple blowers and multiple heaters composition.Its control process is by the environment inside temperature and humidity controller acquisition electric power equipment cabinet
Temperature and humidity issues control signal to blower or heater according to the setting value of environmental requirement, can be opened and closed blower and heater, from
And achievees the purpose that environment and adjust.Controller judges whether are blower or heater by the electric current of acquisition blower or heater simultaneously
It works normally.
A temperature and humidity controller is used from the above mentioned, in addition the structure of multiple blowers, heater once send out by any link
Failure is given birth to, ambient temperature and humidity situation will likely be out of control in entire cabinet.If temperature and humidity controller crashes or hardware fault will make
Blower and heater are out of control.If Temperature Humidity Sensor, which is transmitted through the temperature and humidity inaccuracy come, will lead to malfunction.Temperature and Humidity Control
After device crashes, relay output may be always maintained at the state at moment of crashing, at this time if the case where heater is in opening,
So environment temperature can rise always the running equipment damage that may cause in cabinet, or even cause fire.
Summary of the invention
It is an object of the present invention to overcome defect of the existing technology, above-mentioned technical problem is solved, proposes that one kind is used for
The Modified internal environment control unit and method of electric power equipment cabinet.
The present invention adopts the following technical scheme: a kind of Modified internal environment control unit for electric power equipment cabinet, special
Sign is, including first sensor, second sensor, the first controller, second controller, the first watchdog circuit, second sees
Door dog circuit, the first AND gate circuit, the second AND gate circuit, OR circuit, controlled device, the output end of the first sensor with
The input terminal of first controller is electrically connected, the input terminal electricity of the output end of the second sensor and the second controller
Connection, the output end of first controller respectively with the input terminal of first watchdog circuit, first AND gate circuit
Input terminal electrical connection, the output end of first watchdog circuit respectively with another input terminal of first AND gate circuit,
The input terminal of the second controller is electrically connected；The output end of the second controller respectively with second watchdog circuit
The input terminal electrical connection of input terminal, second AND gate circuit, the output end of second watchdog circuit is respectively with described the
The input terminal electrical connection of another input terminal of two AND gate circuits, first controller；The output end of first AND gate circuit
It is electrically connected respectively with the input terminal of the OR circuit with the output end of second AND gate circuit, the output of the OR circuit
End is electrically connected with the input terminal of the controlled device；First controller passes through RS485 communication line and second control
Device is connected.
Preferably, controlled device includes blower, heater, and the input terminal of blower and heater is defeated with OR circuit respectively
Outlet electrical connection.
Preferably, first sensor uses STH11 digital temperature-humidity sensor, and second sensor uses SMPW-TT-K-
30-SLE thermocouple and HM1500LF humidity sensor.
Preferably, the first controller and second controller are all made of single-chip microcontroller.
The present invention also proposes a kind of Modified internal environment control method for electric power equipment cabinet, which is characterized in that specific
Include the following steps:
If step SS1 first sensor and the temperature difference of second sensor data are within 5 DEG C, humidity is differed 10%
Within, then current temperature and humidity is the two data of the Temperature and Humidity module multiplied by the sum of weight, is passed through by the first controller and second controller
RS485 communication line shares this data；
If step SS2 first sensor and the temperature difference of second sensor data are greater than 5 DEG C or humidity differ 10% with
Upper: if the two weight is unequal, the collected data of the biggish sensor of weight are considered correct data, while determining another
One sensor issues there are failure and accuses alarm signal, notice maintenance；If the two weight is equal, it is concurrent to stop control output
Alarm signal out waits to be repaired；
If a certain sensing data of step SS3, in controlled device attonity temperature change be more than 10 DEG C/min or
Humidity change rate is more than that 30%/min then thinks the sensor there are failure, is subject to the collected data of another sensor；
If a certain sensing data of step SS4, continuous 3 times extremely movement end temperature becomes during controlled device movement changes
Change less than 2 DEG C or humidity variation is less than 5%, then it is assumed that there are failures for the sensor, are with the collected data of another sensor
It is quasi-.
Advantageous effects of the invention: data and history acquisition situation inspection of (1) present invention by two sensors
The failure of analyte sensors is surveyed, guarantees the validity of acquisition data as far as possible；(2) present invention passes through two sensing datas, knot
Its accuracy weight is closed, current temperature and humidity is sought, so that current temperature and humidity accuracy confidence level improves；(3) present invention is logical
Statistics controller fault condition is crossed, the weight of control is provided, optimal controller is allowed to obtain control always；(4) of the invention
Controller failure is detected by watchdog circuit, and masks the output of faulty equipment, while another controller being allowed to obtain
Whole controls.
Detailed description of the invention
Fig. 1 is the topology diagram of traditional electric power equipment cabinet Temperature and Humidity Control scheme.
Fig. 2 is circuit connection structure figure of the invention.
Meaning marked in the figure: 1- first sensor, 2- second sensor, the first controller of 3-, 4- second controller, 5-
First watchdog circuit, the second watchdog circuit of 6-, the first AND gate circuit of 7-, the second AND gate circuit of 8-, 9- OR circuit, 10-
Controlled device, 11-RS485 communication line.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
Fig. 1 is the topology diagram of traditional electric power equipment cabinet Temperature and Humidity Control scheme.Traditional scheme there are the problem of be exactly
Once any link failure will make entire environmental control system fail, or even have fire risk.Simultaneous faults detection can also
It can not can correctly judge and be transmitted to monitoring backstage.
Fig. 2 is circuit connection structure figure of the invention.The present invention proposes a kind of Modified internal ring for electric power equipment cabinet
Border control device, which is characterized in that including first sensor 1, second sensor 2, the first controller 3, second controller 4,
One watchdog circuit 5, the second watchdog circuit 6, the first AND gate circuit 7, the second AND gate circuit 8, OR circuit 9, controlled device
10, the output end of first sensor 1 is electrically connected with the input terminal of the first controller 3, the output end of second sensor 2 and the second control
The input terminal of device 4 processed is electrically connected, the output end of the first controller 3 respectively with the input terminal of the first watchdog circuit 5, first and door
The input terminal of circuit 7 is electrically connected, the output end of the first watchdog circuit 5 respectively with another input terminal of the first AND gate circuit 7, the
The input terminal of two controllers 4 is electrically connected；The output end of second controller 4 respectively with the input terminal of the second watchdog circuit 6, second
The input terminal of AND gate circuit 8 is electrically connected, another input with the second AND gate circuit 8 respectively of the output end of the second watchdog circuit 6
The input terminal electrical connection at end, the first controller 3；The output end of first AND gate circuit 7 and the output end of the second AND gate circuit 8 difference
It is electrically connected with the input terminal of OR circuit 9, the output end of OR circuit 9 is electrically connected with the input terminal of controlled device 10；First control
Device 3 processed is connected by RS485 communication line 11 with second controller 4.
Controlled device 10 includes blower, heater, the input terminal of the blower and heater output end with OR circuit 9 respectively
Electrical connection.First controller 3 is all made of single-chip microcontroller with second controller 4.
As a kind of preferred embodiment, first sensor 1 uses STH11 digital temperature-humidity sensor, the second sensing
Device 2 uses the SMPW-TT-K-30-SLE thermocouple and HM1500LF humidity sensor of analog output.To the digital temperature of STH11
The weight marking of humidity sensor is 49%, and the SMPW-TT-K-30-SLE thermocouple and HM1500LF humidity of analog output pass
The marking of sensor weight is 51%.
The present invention also proposes a kind of Modified internal environment control method for electric power equipment cabinet, which is characterized in that specific
Include the following steps:
If step SS1 first sensor 1 and the temperature difference of 2 data of second sensor, within 5 DEG C, humidity difference exists
Within 10%, then current temperature and humidity is the two data of the Temperature and Humidity module multiplied by the sum of weight, by the first controller 3 and second controller 4
This data is shared through RS485 communication line 11；
If step SS2 first sensor 1 is greater than 5 DEG C with the temperature difference of 2 data of second sensor or humidity is differed 10%
More than: if the two weight is unequal, the collected data of the biggish sensor of weight are considered correct data, determine simultaneously
Another sensor issues there are failure and accuses alarm signal, notice maintenance；If the two weight is equal, stop control output simultaneously
Alarm signal is issued, is waited to be repaired；
If a certain sensing data of step SS3, in 10 attonity of controlled device, temperature change is more than 10 DEG C/min
Or humidity change rate is more than that 30%/min then thinks the sensor there are failure, is subject to the collected data of another sensor；
If a certain sensing data of step SS4, continuous 3 times during the movement variation of controlled device 10 to movement end temperature
Variation is less than 2 DEG C or humidity variation is less than 5%, then it is assumed that there are failures for the sensor, with the collected data of another sensor
Subject to.
First controller 3 distinguishes output pulse signal to the first watchdog circuit 5, the second house dog with second controller 4
Circuit 6 operates, and exports 0 if the first watchdog circuit 5 or the second watchdog circuit 6 do not feed dog pulse, otherwise exports 1.
First watchdog circuit 5 detects the failure of the first controller 3, and masks the output of faulty first controller, allows simultaneously
Another controller obtains whole controls.I.e. by the output of the first watchdog circuit 5 and the output of the first controller 3 input the
The output of second watchdog circuit 6 and the output of second controller 4 are inputted the second AND gate circuit 8 by one AND gate circuit 7, and will
First watchdog circuit 5 is exported to second controller 4, and second controller 4 can be actively by the control of oneself after receiving signal
It brings up again and is upgraded to 100%, completely acquisition control, continue to take over by the controller there is no failure and complete control task, similarly
Second watchdog circuit 6 is exported to the first controller 3, and the first controller 3 can be actively by the control of oneself after receiving signal
It brings up again and is upgraded to 100%, completely acquisition control.
Two sets of equipment that the present invention the uses while probability to break down is also low compared with single set equipment probability.If the first controller
1(A) and second controller 2(B) failure rate be respectively P (A) and P (B), two simultaneous probability of controller for P (AB)=
P (A) * P (B) is 0.5% if two sets of equipment have identical failure rate, then the probability that breaks down simultaneously is 0.25%, significantly
Improve the reliability of equipment.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (1)
1. a kind of method of the Modified internal environment control unit for electric power equipment cabinet, which is characterized in that the control device
It is described including first sensor (1), second sensor (2), the first controller (3), second controller (4), controlled device (10)
The output end of first sensor (1) is electrically connected with the input terminal of first controller (3), the second sensor (2) it is defeated
Outlet is electrically connected with the input terminal of the second controller (4), and first controller (3) passes through RS485 communication line (11)
It is connected with the second controller (4), this method specifically comprises the following steps:
If step SS1 first sensor (1) and the temperature difference of second sensor (2) data, within 5 DEG C, humidity difference exists
Within 10%, then current temperature and humidity is the two data of the Temperature and Humidity module multiplied by the sum of weight, by the first controller (3) and the second control
Device (4) shares this data through RS485 communication line (11)；
If step SS2 first sensor (1) is greater than 5 DEG C with the temperature difference of second sensor (2) data or humidity differs
10% or more: if the two weight is unequal, the collected data of the biggish sensor of weight are considered correct data, simultaneously
Determining another sensor, there are failures, issue alarm signal, notice maintenance；If the two weight is equal, stop control output
And alarm signal is issued, it waits to be repaired；
If a certain sensing data of step SS3, in controlled device (10) attonity temperature change be more than 10 DEG C/min or
Humidity change rate is more than that 30%/min then thinks the sensor there are failure, is subject to the collected data of another sensor；
If a certain sensing data of step SS4, continuous 3 times extremely movement end temperature becomes during controlled device (10) movement changes
Change less than 2 DEG C or humidity variation is less than 5%, then it is assumed that there are failures for the sensor, are with the collected data of another sensor
It is quasi-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610693957.8A CN106200489B (en) | 2016-08-18 | 2016-08-18 | A kind of Modified internal environment control unit and method for electric power equipment cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610693957.8A CN106200489B (en) | 2016-08-18 | 2016-08-18 | A kind of Modified internal environment control unit and method for electric power equipment cabinet |
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| Publication Number | Publication Date |
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| CN106200489A CN106200489A (en) | 2016-12-07 |
| CN106200489B true CN106200489B (en) | 2019-06-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4106257A1 (en) * | 1991-02-28 | 1992-09-03 | Pierburg Gmbh | Throttle flap controller for combustion engine air intake - incorporates redundant microprocessors with multiplex input-output diagnostic memory and watchdog logic for emergency switch operation |
| EP0742499B1 (en) * | 1995-05-11 | 2001-09-05 | Siemens Aktiengesellschaft | Reliable processing of safety-oriented process signals |
| CN1722077A (en) * | 2004-07-12 | 2006-01-18 | 普安科技股份有限公司 | Controller capable of self-monitoring, redundant storage system having the same, and method thereof |
| CN101000591A (en) * | 2006-12-30 | 2007-07-18 | 中国船舶重工集团公司第七一一研究所 | Double-machine redundancy system based on embedded CPU |
| WO2007124942A1 (en) * | 2006-05-03 | 2007-11-08 | Ab Skf | Circuit arrangement, and method for the operation of a circuit arrangement |
| CN206096822U (en) * | 2016-08-18 | 2017-04-12 | 南京瑞科特电气有限责任公司 | A inside environment control device of improved generation for electric power rack |
-
2016
- 2016-08-18 CN CN201610693957.8A patent/CN106200489B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4106257A1 (en) * | 1991-02-28 | 1992-09-03 | Pierburg Gmbh | Throttle flap controller for combustion engine air intake - incorporates redundant microprocessors with multiplex input-output diagnostic memory and watchdog logic for emergency switch operation |
| EP0742499B1 (en) * | 1995-05-11 | 2001-09-05 | Siemens Aktiengesellschaft | Reliable processing of safety-oriented process signals |
| CN1722077A (en) * | 2004-07-12 | 2006-01-18 | 普安科技股份有限公司 | Controller capable of self-monitoring, redundant storage system having the same, and method thereof |
| WO2007124942A1 (en) * | 2006-05-03 | 2007-11-08 | Ab Skf | Circuit arrangement, and method for the operation of a circuit arrangement |
| CN101000591A (en) * | 2006-12-30 | 2007-07-18 | 中国船舶重工集团公司第七一一研究所 | Double-machine redundancy system based on embedded CPU |
| CN206096822U (en) * | 2016-08-18 | 2017-04-12 | 南京瑞科特电气有限责任公司 | A inside environment control device of improved generation for electric power rack |
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| Publication number | Publication date |
|---|---|
| CN106200489A (en) | 2016-12-07 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20190521 Address after: 210 000 Buyue Road, 29 Qiaolin Street, Pukou District, Nanjing City, Jiangsu Province, 12-138 Applicant after: Nanjing Ruiwu Electric Co., Ltd. Address before: 211800 Pearl River Economic Development Zone, Pearl River Town, Pukou District, Nanjing City, Jiangsu Province Applicant before: Nanjing Ruikete Electrical Co., Ltd. |
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| GR01 | Patent grant |