CN202025227U - CAN (Controller Area Network) bus monitoring system of substation - Google Patents
CAN (Controller Area Network) bus monitoring system of substation Download PDFInfo
- Publication number
- CN202025227U CN202025227U CN2011201114410U CN201120111441U CN202025227U CN 202025227 U CN202025227 U CN 202025227U CN 2011201114410 U CN2011201114410 U CN 2011201114410U CN 201120111441 U CN201120111441 U CN 201120111441U CN 202025227 U CN202025227 U CN 202025227U
- Authority
- CN
- China
- Prior art keywords
- module
- responsible
- bus
- signal
- data
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Selective Calling Equipment (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model discloses a CAN (Controller Area Network) bus monitoring system of a substation, which comprises a CAN bus, an analog quantity IO (input/output) module, a digital quantity IO module, an interaction module and a communication module; the analog quantity IO module collects temperature, pressure and practical openness values of an electric adjusting valve in the substation, and automatically controls the openness of the electric adjusting valve; the digital quantity IO module collects signals of various pumps in the substation, collects liquid level marks and automatically controls the on/off of various pumps; the interaction module collects data of thermal meters, displays various data and set control parameters; and the communication module uploads the local data to a data center, receives the command of the data center, and interacts with information of other systems in the substation. By adopting the distributive type system structure, the sensing measurement, compensation computation, work amount processing and control and other functions can be dispersed and completed in on-site equipment, and the monitoring reliability of the substation can be improved.
Description
Technical field
The utility model relates to automation field, particularly a kind of supervisory system of thermal substation.
Background technology
Thermal substation is the terminal heat exchange place of central heating system, flow through the parameters such as temperature, pressure, flow of hot water in the thermal substation pipeline, and the state of the motor regulated valve of installing on the pipeline there is crucial reference value for the heating quality that guarantees the final user.At present, all there is supervisory system that these parameters and state are gathered automatically in the thermal substation,, comparatively also has the function of automatic control motorized adjustment device in the Xian Jin system simultaneously in order to improve heating efficiency.Existing Monitoring and Control for Heating Station system adopts centralized controller, but because environment comparatively abominable (high temperature, high humidity, electromagnetic interference (EMI) are big) in the thermal substation, simultaneously because parameter point to be collected is too much and very dispersion, cause too high and stability of cost and maintainability generally not strong, need new control system just can better adapt to control present situation in the thermal substation.
The CAN bus is that German BOSCH company is for solving a kind of serial data communication agreement that control numerous in the Hyundai Motor and the exchanges data between the testing tool are developed, it is a kind of multi-master bus, communication media can be twisted-pair feeder, concentric cable or light transmitting fiber, and traffic rate can reach 1Mbps.The CAN bus protocol is authenticated by ISO (International Standards Organization), the technology comparative maturity, and chip is commercialization, is highly suitable for the data communication between the distributed measurement and control system.The characteristic of CAN brilliance, high reliability and unique design are particularly suitable for the interconnection of industrial process watch-dog, therefore, more and more are subjected to the attention of industry member, and have been known as one of the most promising fieldbus.
The utility model content
For solving determining of centralized monitoring, the utility model aim to provide a kind of with low cost, reliability is high, the distributed heating power station supervisory system that is easy to safeguard.
The technical scheme of thermal substation CAN monitoring bus of the present utility model system is as follows:
Thermal substation CAN monitoring bus of the present utility model system comprises the CAN bus and is connected analog quantity IO module, digital quantity IO module, interactive module and communication module on the described CAN bus; Described analog quantity IO module is mainly used in the numerical value of gathering temperature, pressure, the actual aperture of electric control valve in the thermal substation, controls the aperture of electric control valve automatically; Described digital quantity IO module is mainly used in the signal of gathering various pumps in the thermal substation, gathers the liquid level sign, controls the start-stop of various pumps automatically; Described interactive module is mainly used in and gathers the hotlist data, shows various data and controlled variable is set; Described communication module is mainly used in local data is uploaded to data center, receives the instruction of data center, with the information interaction of other system in the thermal substation; Described CAN bus is mainly used in the data communication between described analog quantity IO module, digital quantity IO module, interactive module and the communication module.
Preferably, all comprise the CAN bus communication unit that is used for the CPU that the control module function realizes and is used for communicating in described analog quantity IO module, digital quantity IO module, interactive module and the communication module by described CAN bus and other modules.
Preferably, described CAN bus communication unit comprises control circuit, bus driving circuits and CAN interface; Described control circuit is responsible for data are split and packing, and the data transfer that the data set on the described CAN bus is synthetic continuous is given described CPU; Described bus driving circuits is responsible for the generation or the demodulation of the bit level of described CAN bus; Described CAN interface, the data of getting well of being responsible for pack send in the bit stream mode of described CAN bus, perhaps receive the bit flow data of described CAN bus.
Preferably, described analog quantity IO module also comprises analog acquisition unit and analog quantity output unit; Described analog acquisition unit comprises collection terminal notch portion, signal condition part and A/D conversion portion; Described collection terminal notch portion is responsible for the power supply and the reception of 4-20mA signal, and has anti-short circuit function; Described signal condition part is responsible for the signal of gathering is put in order and conversion; It is digital signal and the CPU that passes to described analog quantity IO module that described A/D conversion portion is responsible for analog-signal transitions; Described analog quantity output unit comprises D/A conversion portion, driving circuit section and output port part; Described D/A conversion portion, it is simulated to be responsible for that CPU is calculated digital signal; Described driving circuit section is responsible for output signal being amplified and nursing one's health; Described output port part is responsible for sending output signal safety.
Preferably, described digital quantity IO module also comprises digital data acquisition unit and digital quantity output unit; Described digital data acquisition unit comprises collection terminal notch portion, signal condition part and acquired signal digital filtering part; Described collection terminal notch portion is responsible for the collection of signal; Described signal condition part is responsible for the signal of gathering is put in order and conversion; Described acquired signal digital filtering partly is responsible for filtering the improper saltus step and the unusual fluctuation of the digital quantity signal of gathering; Described digital quantity output unit comprises output port part, driving circuit section and output signal digital filtering part; Described output port partly is responsible for sending output signal safety; Described driving circuit section is responsible for output signal is nursed one's health and power amplification; Described output signal digital filtering partly is responsible for filtering the improper saltus step and the unusual fluctuation of output digital quantity signal.
Preferably, interactive module also comprises RS232 interface, RS485 interface and control terminal; Described RS232 interface is responsible for connecting hotlist, reads the hotlist data; Described RS485 interface is responsible for connecting control terminal, is used for and user interactions; Described control terminal is used to receive user's instruction.
Preferably, described control terminal is display screen and keyboard, perhaps is touch-screen.
Preferably, described communication module also comprises RS232 interface and RS485 interface; Described RS234 interface is responsible for connecting DTU and is used for data radio communication; Described RS485 interface is responsible for connecting interior other control system of thermal substation and is used for exchanges data.
Preferably, described CAN bus is a kind of in twisted-pair feeder, concentric cable or the light transmitting fiber.
The beneficial effects of the utility model are as follows:
Thermal substation CAN monitoring bus of the present utility model system, with sensing measurement, compensation calculate, quantities is handled with functions such as control is distributed to and finishes in the field apparatus, only depend on field apparatus can finish the basic function of automatic control, and the running status of diagnostic device at any time.Because field apparatus itself can have been finished the basic function of automatic control, fundamentally changed the defective of existing Centralized Monitoring, simplified system architecture, improved the reliability and maintainability of system.The CAN bus that adopts can be supported twisted-pair feeder, concentric cable, optical cable, radio frequency, infrared ray, line of electric force etc. as the fieldbus of plant network bottom, has stronger antijamming capability, can adapt to abominable site environment.The CAN bus can also adopt two-wire system to realize sending electricity and communicating by letter, and can satisfy the basic security requirement of explosion proof.
Description of drawings
Fig. 1: thermal substation CAN monitoring bus system construction drawing
Fig. 2: the composition of analog quantity IO module
Fig. 3: analog quantity IO modular program process flow diagram
Fig. 4: the composition of digital quantity IO module
Fig. 5: digital quantity IO modular program process flow diagram
Fig. 6: the composition of communication module
Fig. 7: communication module program flow diagram
Fig. 8: the composition of interactive module
Fig. 9: interactive module program flow diagram
Embodiment
Below in conjunction with accompanying drawing, technology contents of the present utility model is described.
In general, the thermal substation automatic control system should mainly be finished following work:
1) gathers analog quantity parameter (temperature, pressure, the actual aperture of electric control valve) in the thermal substation
2) control the aperture of electric control valve automatically
3) signal (ebullator, small pump) of various pumps in the collection thermal substation
4) gather some necessary liquid level signs (high water tank height)
5) control the start-stop of various pumps automatically
6) gather the hotlist data
7) show various data and the function that controlled variable is set is provided
8) local data is uploaded to data center, and receive the instruction of data center and the information interaction of interior other system of thermal substation
9) with thermal substation in the information interaction of other system
10) the automatic warning and the running status record
By simple analysis, we are 1), 2) functional requirement is planned for a class intelligent node, is referred to as analog quantity IO module; 3), 4), 5) functional requirement is planned for a class intelligent node, is referred to as digital quantity IO module; 6), 7) functional requirement is planned for a class intelligent node, is referred to as interactive module; 8), 9) functional requirement is planned for a class intelligent node, is referred to as communication module; The 10th) function is dissolved in the middle of the 4 class intelligent nodes of front.As shown in Figure 1, above-mentioned 4 generic modules are all coupled together by the CAN bus, realize information sharing.
One, analog quantity IO Module Design and realization
The function that analog quantity IO module need realize is as follows: by the 4-20mA signal that sensor transducer comes out, gather analog quantity parameter in the thermal substation; According to control strategy, output voltage or Current Control valve are controlled the aperture of electric control valve automatically; Carry out the CAN bus communication.
Fig. 2 is the composition of analog quantity IO module, comprises analog acquisition unit, analog quantity output unit, CAN bus communication unit and CPU.
Wherein: the analog acquisition unit comprises collection terminal notch portion, signal condition part and A/D conversion portion; Described collection terminal notch portion is responsible for the power supply and the reception of 4-20mA signal, and has anti-short circuit function; Described signal condition part is responsible for the signal of gathering is put in order and conversion; It is digital signal and the CPU that passes to described analog quantity IO module that described A/D conversion portion is responsible for analog-signal transitions.
The analog quantity output unit comprises D/A conversion portion, driving circuit section and output port part; Described D/A conversion portion, it is simulated to be responsible for that CPU is calculated digital signal; Described driving circuit section is responsible for output signal being amplified and nursing one's health; Described output port part is responsible for sending output signal safety.
CAN bus communication unit comprises control circuit, bus driving circuits and CAN interface; Control circuit is responsible for data are split and packing, and the data transfer that the data set on the CAN bus is synthetic continuous is given CPU; Bus driving circuits is responsible for the generation or the demodulation of the bit level of CAN bus; The CAN interface, the data of getting well of being responsible for pack send in the bit stream mode of described CAN bus, perhaps receive the bit flow data of described CAN bus
The control program of operation is responsible for finishing all functions of analog quantity IO module in the CPU, and the overall flow of program as shown in Figure 3.
The program of this module is comparatively simple, the benefit that this is decentralized just.Wherein the program of core is to realize the control strategy part the most, and what adopt at present is the Fuzzy PID that has priori.Under the extreme case, in all system modules, even have only this module normally to move, still can guarantee normally the carrying out of heat supply (valve opening control), this is the result of scattered risks just.
Two, digital quantity IO Module Design and realization
The function that digital quantity IO module need realize is as follows: the signal of gathering various pumps (ebullator, small pump) in the thermal substation by relay contact; Gather some necessary liquid level signs (high water tank height) by relay contact; By the relay contact start-stop of the various pumps of control automatically; Carry out the CAN bus communication.
Figure 4 shows that the composition of digital quantity IO module, comprise digital data acquisition unit, digital quantity output unit, CAN bus communication unit and CPU.
Wherein: the digital data acquisition unit comprises collection terminal notch portion, signal condition part and acquired signal digital filtering part; Described collection terminal notch portion is responsible for the collection of signal; Described signal condition part is responsible for the signal of gathering is put in order and conversion; Described acquired signal digital filtering partly is responsible for filtering the improper saltus step and the unusual fluctuation of the digital quantity signal of gathering;
The digital quantity output unit comprises output port part, driving circuit section and output signal digital filtering part; Described output port partly is responsible for sending output signal safety; Described driving circuit section is responsible for output signal is nursed one's health and power amplification; Described output signal digital filtering partly is responsible for filtering the improper saltus step and the unusual fluctuation of output digital quantity signal.
CAN bus communication unit is the same with CAN bus communication unit in the analog quantity IO module.
The control program of operation is responsible for finishing all functions of digital quantity IO module in the CPU, and the overall flow of program as shown in Figure 5.
The program of this module is comparatively simple, the benefit that this is decentralized just.Wherein the program of core is to realize the control strategy part the most, need handle according to actual conditions.
Three, the communication module function that need realize is as follows: by DTU and cdma network local data is uploaded to data center, and receive the instruction of data center; Carry out information interaction with smart card in the thermal substation with hot system, frequency conversion unit or the like other system; Carry out the CAN bus communication.
Fig. 6 is the composition of communication module, and wherein the RS232 interface is responsible for connecting DTU and is used for data radio communication.The RS485 interface is responsible for connecting interior other control system of thermal substation and is used for exchanges data.CAN bus communication unit is the same with CAN bus communication unit in the analog quantity IO module.
The control program of operation is responsible for finishing all functions of communication module in the CPU, and the overall flow of program as shown in Figure 7.
The program of this module is comparatively simple, the benefit that this is decentralized just.Wherein the program of core is the packing data part the most, need carry out according to the communication protocol of host computer; When host computer has instruction to issue local control system, also be to resolve herein and to handle simultaneously.
Four, the design of interactive module and realization
The function that interactive module need realize is as follows: gather the hotlist data by the MBUS bus; By display screen and keyboard or the various data of screen displaying, provide the function that controlled variable is set; Carry out the CAN bus communication.
Fig. 8 is the composition of interactive module, and wherein the RS232 interface is responsible for connecting the hotlist module and is used to read the hotlist data.The RS485 interface is responsible for connecting that control terminal is used for and user interactions.Control terminal is display screen and keyboard, perhaps is touch-screen.CAN bus communication unit is the same with CAN bus communication unit in the analog quantity IO module.
The control program of operation is responsible for finishing all functions of interactive module in the CPU, and the overall flow of program is shown in Figure 9.
The program of this module is comparatively simple, the benefit that this is decentralized just.Wherein the program of core is to read the hotlist data division the most.In addition, for the ease of debugging, this module also provides the interface by serial ports configuration The whole control system parameter.
Claims (9)
1. thermal substation CAN monitoring bus system is characterized in that: comprise CAN bus and the analog quantity IO module, digital quantity IO module, interactive module and the communication module that are connected on the described CAN bus;
Described analog quantity IO module is mainly used in the numerical value of gathering temperature, pressure, the actual aperture of electric control valve in the thermal substation, controls the aperture of electric control valve automatically;
Described digital quantity IO module is mainly used in the signal of gathering various pumps in the thermal substation, gathers the liquid level sign, controls the start-stop of various pumps automatically;
Described interactive module is mainly used in and gathers the hotlist data, shows various data and controlled variable is set;
Described communication module is mainly used in local data is uploaded to data center, receives the instruction of data center, with the information interaction of other system in the thermal substation;
Described CAN bus is mainly used in the data communication between described analog quantity IO module, digital quantity IO module, interactive module and the communication module.
2. thermal substation CAN monitoring bus according to claim 1 system, it is characterized in that: the CAN bus communication unit that all comprises the CPU that is used for the realization of control module function in described analog quantity IO module, digital quantity IO module, interactive module and the communication module and be used for communicating by described CAN bus and other modules.
3. thermal substation CAN monitoring bus according to claim 2 system, it is characterized in that: described CAN bus communication unit comprises control circuit, bus driving circuits and CAN interface;
Described control circuit is responsible for data are split and packing, and the data transfer that the data set on the described CAN bus is synthetic continuous is given described CPU;
Described bus driving circuits is responsible for the generation or the demodulation of the bit level of described CAN bus;
Described CAN interface, the data of getting well of being responsible for pack send in the bit stream mode of described CAN bus, perhaps receive the bit flow data of described CAN bus.
4. thermal substation CAN monitoring bus according to claim 2 system, it is characterized in that: described analog quantity IO module also comprises analog acquisition unit and analog quantity output unit;
Described analog acquisition unit comprises collection terminal notch portion, signal condition part and A/D conversion portion; Described collection terminal notch portion is responsible for the power supply and the reception of 4-20mA signal, and has anti-short circuit function; Described signal condition part is responsible for the signal of gathering is put in order and conversion; It is number space signal and the CPU that passes to described analog quantity IO module that described A/D conversion portion is responsible for analog-signal transitions;
Described analog quantity output unit comprises D/A conversion portion, driving circuit section and output port part; Described D/A conversion portion, it is simulated to be responsible for that CPU is calculated digital signal; Described driving circuit section is responsible for output signal being amplified and nursing one's health; Described output port part is responsible for sending output signal safety.
5. thermal substation CAN monitoring bus according to claim 2 system, it is characterized in that: described digital quantity IO module also comprises digital data acquisition unit and digital quantity output unit;
Described digital data acquisition unit comprises collection terminal notch portion, signal condition part and acquired signal digital filtering part; Described collection terminal notch portion is responsible for the collection of signal; Described signal condition part is responsible for the signal of gathering is put in order and conversion; Described acquired signal digital filtering partly is responsible for filtering the improper saltus step and the unusual fluctuation of the digital quantity signal of gathering;
Described digital quantity output unit comprises output port part, driving circuit section and output signal digital filtering part; Described output port partly is responsible for sending output signal safety; Described driving circuit section is responsible for output signal is nursed one's health and power amplification; Described output signal digital filtering partly is responsible for filtering the improper saltus step and the unusual fluctuation of output digital quantity signal.
6. thermal substation CAN monitoring bus according to claim 2 system, it is characterized in that: described interactive module also comprises RS232 interface, RS485 interface and control terminal;
Described RS232 interface is responsible for connecting hotlist, reads the hotlist data; Described RS485 interface is responsible for connecting control terminal, is used for and user interactions; Described control terminal is used to receive user's instruction.
7. thermal substation CAN monitoring bus according to claim 6 system, it is characterized in that: described control terminal is display screen and keyboard, perhaps is touch-screen.
8. thermal substation CAN monitoring bus according to claim 2 system, it is characterized in that: described communication module also comprises RS232 interface and RS485 interface;
Described RS234 interface is responsible for connecting DTU and is used for data radio communication; Described RS485 interface is responsible for connecting interior other control system of thermal substation and is used for exchanges data.
9. thermal substation CAN monitoring bus according to claim 1 system is characterized in that: described CAN bus is a kind of in twisted-pair feeder, concentric cable or the light transmitting fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201114410U CN202025227U (en) | 2011-04-15 | 2011-04-15 | CAN (Controller Area Network) bus monitoring system of substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201114410U CN202025227U (en) | 2011-04-15 | 2011-04-15 | CAN (Controller Area Network) bus monitoring system of substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202025227U true CN202025227U (en) | 2011-11-02 |
Family
ID=44850172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201114410U Expired - Lifetime CN202025227U (en) | 2011-04-15 | 2011-04-15 | CAN (Controller Area Network) bus monitoring system of substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202025227U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901886A (en) * | 2012-12-28 | 2014-07-02 | 中国科学院沈阳自动化研究所 | Universal CAN node for distributed agricultural machine navigation control system |
| CN113623721A (en) * | 2021-08-10 | 2021-11-09 | 长春市云谷节能科技有限公司 | Supply and return water digital data processing system and method based on analog-to-digital conversion control |
| RU2773717C1 (en) * | 2021-07-28 | 2022-06-08 | Общество с ограниченной ответственностью "Цифровые энергосистемы" | Method for restoring measurements for the purposes of automated control systems |
-
2011
- 2011-04-15 CN CN2011201114410U patent/CN202025227U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901886A (en) * | 2012-12-28 | 2014-07-02 | 中国科学院沈阳自动化研究所 | Universal CAN node for distributed agricultural machine navigation control system |
| RU2773717C1 (en) * | 2021-07-28 | 2022-06-08 | Общество с ограниченной ответственностью "Цифровые энергосистемы" | Method for restoring measurements for the purposes of automated control systems |
| CN113623721A (en) * | 2021-08-10 | 2021-11-09 | 长春市云谷节能科技有限公司 | Supply and return water digital data processing system and method based on analog-to-digital conversion control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210223030U (en) | Acquisition transmission system based on loRa and HMI gateway | |
| CN105223939A (en) | Be applicable to the multi-source heat transfer agent data acquisition and controlling integration fexible unit of agriculture Internet of Things application | |
| CN101452639A (en) | Ethernet network data acquisition and transmission method and system | |
| CN207082904U (en) | A kind of Multifunctional power distribution automated system | |
| CN101231526A (en) | Distributed monitoring system for running state of induction machine | |
| CN105204429A (en) | Industrial multiple-parameter data remote transmission device | |
| CN201134815Y (en) | Ethernet data collecting and transmitting system | |
| CN202025227U (en) | CAN (Controller Area Network) bus monitoring system of substation | |
| CN208722043U (en) | A kind of water factory's Internet of Things+intelligent cloud management system | |
| CN205103648U (en) | Multisource sensing information acquisition and control integration multipurpose plant suitable for networking of agricultural thing is used | |
| CN204009531U (en) | The monitoring of methane station online data and uploading system | |
| CN109901507A (en) | A kind of water factory's remote monitoring system based on PLC | |
| CN103424649A (en) | Energy efficiency acquisition terminal | |
| CN202177813U (en) | Continuous hot press management-control integrated system | |
| CN206041638U (en) | Real -time supervision monitoring device of electric substation | |
| CN102955471A (en) | Intelligent management and control system based on mass flow meter | |
| CN202066117U (en) | Thermal energy district heating controller | |
| CN202660681U (en) | Control system of energy-storage air conditioning local work station | |
| CN201113374Y (en) | Electrical power system microcomputer protecting measuring and controlling device based on double CPU structure | |
| CN203588061U (en) | PLC-based automatic control system for waterworks | |
| CN202205083U (en) | Control cabinet for automatic dosing process | |
| CN203012469U (en) | Integrated acquisition control equipment | |
| CN205121302U (en) | Industrial many parameter data teletransmission device | |
| CN213585813U (en) | Park enterprise end multipotency data acquisition gateway | |
| CN202998141U (en) | Distributed wireless and field bus monitoring network for coal preparation plants |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room 512, Zhongyuan Building, 15 Zhixin Road, Haidian District, Beijing 100083 Patentee after: Beijing Thermal Intelligent Control Technology Co., Ltd. Address before: Room 512, Zhongyuan Building, 15 Zhixin Road, Haidian District, Beijing 100083 Patentee before: Beijing Teheng Control Engineering Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111102 |