CN203951259U - Mine power supply monitoring device - Google Patents
Mine power supply monitoring device Download PDFInfo
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- CN203951259U CN203951259U CN201320836837.0U CN201320836837U CN203951259U CN 203951259 U CN203951259 U CN 203951259U CN 201320836837 U CN201320836837 U CN 201320836837U CN 203951259 U CN203951259 U CN 203951259U
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Abstract
The mine power supply monitoring device that the utility model provides, it comprises: analog quantity acquisition circuit, input and output circuit, communication interface circuit, via memory interface circuit, low-pass filter circuit, man-machine interface, isolated drive circuit, main control unit, installation's power source module, it is characterized in that: analog quantity acquisition circuit by three-phase alternating current information through PT, CT is transferred to device interface terminal, after isolated variable, convert the real-time signal of telecommunication to and be transferred to microprocessing unit through low-pass filter circuit and D/A converting circuit again, can realize the collecting work of analog information, can realize the real-time control on off state by input and output module simultaneously, the monitoring of the analog quantity to different switches is being transmitted by communication interface, mainly on traditional " point protection " basis, be provided with the protection algorithm of anti-power supply trouble " overstep tripping ", can operate in man-machine interface simultaneously.
Description
Technical field
The utility model belongs to technical field of automation, relates to a kind of mine power supply monitoring device.
Background technology
The multiple supervisory control system of China's independent research has played positive role to improving Safety of Coal Mine Production situation, and by the analysis to subsurface environment parameter, the possibility occurring for accident provides data information, so that the accident that will occur is taked to the precautionary measures; Imminent accident is reported to the police in time, automatically realize power-off, to avoid the extension of accident; In the time having an accident, provide in time escape route, provide information for implementing rescue.But a lot of supervisory control systems exist a lot of drawbacks in actual applications, because the monitoring of different system is separate, poor compatibility, and the supervisory control system of networking is owing to adopting different communication and information exchange standard, is difficult to accomplish information sharing and unified management.Make full use of advanced information-based means and industrial monitoring technology, accelerate mine machinery, automation and informatization, solving general character, a key difficult problem in China's coal-mine safety in production, is the effective measure of improving the important means of mine safety status in China and promoting Safety of Coal Mine Production work.
Therefore, this research, for the problem existing in Monitoring for Coal Mine technology, is selected safety of coal mines automatically to detect, monitor administrating system and is very important as main research.Employing protocol conversion mechanism can be transmitted RS-485 and CAN interface message simultaneously, and different serial port protocols is unified.Along with development information-based, intelligent, networking, embedded system technology is little with its volume, reliability is high, power consumption is little etc., and feature has obtained development space widely.
In this research, the electric power system monitoring device of design is exactly the downhole network intelligent substation based on ARM, adopts 32 bit processor LPC2148, and has embedded real time operating system μ C/OS-II and open tcp/ip communication agreement.It has improved the processing speed of system, and has good compatibility.Its achievement is to improving safety detection, the automation of monitoring, the level of IT application, strengthens safety of coal mines dispatch control, administrative decision ability is significant.
Utility model content
The purpose of this utility model is to provide a kind of mine power supply monitoring device.Solved the system compatibility existing in prior art poor, communications protocol cannot be unified, and communication interface is single, hardware designs complexity, the problem such as volume is large, poor reliability, and power consumption is large.
The technical solution of the utility model is mine power supply monitoring device, it comprises: analog quantity acquisition circuit, input and output circuit, communication interface circuit, via memory interface circuit, low-pass filter circuit, man-machine interface, isolated drive circuit, main control unit, installation's power source module, it is characterized in that: analog quantity acquisition circuit by three-phase alternating current information through PT, CT is transferred to device interface terminal, after isolated variable, convert the rational signal of telecommunication to and be transferred to microprocessing unit through low-pass filter circuit and D/A converting circuit again, can realize the collecting work of analog information, can realize the real-time control on off state by input and output module simultaneously, the monitoring of the analog quantity to different switches is being transmitted by communication interface, finally can operate in man-machine interface.
Described analog quantity acquisition circuit is mainly converter.Every block of analog acquisition plate all by 3 groups of voltages voltage changer LCTV52CF and four groups of electric currents voltage changer LCTA51BF form.Voltage transformer adopts model TR1176-4C, and protective current instrument transformer adopts TR0176-4C, measures current transformer and adopts TR0176-4C.
Described opening is that the information about power of switch or positional information are transmitted by relay into circuit, and relay model used is NC4D-JP, and digital output circuit is that controlled quentity controlled variable is operated, and relay model used is DSP2a-L2.
Described inverter circuit is three phase full bridge inverter circuit, is made up of the insulated gate bipolar transistor of six IRGB20B120UD-EP models.
Described communication interface circuit is and the Key Circuit of each intelligent object communication, this bus circuit is made up of MAX485CSA chip and 2 120 Ω, accurate, stable for information, in design, add photoisolator and Transient Suppression Diode, model is respectively 6N137 and SMBJ5.0CA.
The acp chip of described via memory interface circuit is ferroelectric memory AT24C256.
Described isolated drive circuit is to have photoisolator, electromagnetic absorption device etc.Main chip has 6N137, TLP521, TAIYO-DDLCZFBM etc.
Described power module model is VFB1215MP.
Described main control unit is divided into task management and information processing two large divisions, and the former adopts chip ARM7LPC2148, and the latter adopts chip TMS320F28335.
The beneficial effects of the utility model are that the information about power in order to make pit gear layer can be transferred to maincenter decision-making level in real time, accurately; collect the facility information of different agreement; and on the basis of traditional protection, set up anti-overstep tripping defencive function; the design selects two-way TVS in RS-485 interface circuit; model is SMBJ5.0CA, can absorb instantaneous large pulse power in square direction, protection signal of communication; adopt High-Speed Coupled Device simultaneously, effectively suppressed signal interference.Native system adopts ARM7LPC2148 and TMS320F28335 synthetic operation, and ARM7 can realize the management of multitask, and DSP28335 can realize the protection of the anti-overstep tripping of multi-Agent on the basis of processing traditional protection.Human-machine interface module is made up of the very color liquid crystal display of TFT1289 and 4 × 4 buttons, is used for input and the parameter of display system work, realizes visual.
Brief description of the drawings
Fig. 1 is mine power supply monitoring device entirety control block diagram;
Fig. 2 is mine power supply monitoring unit simulation amount collection figure;
Fig. 3 is ferroelectric memory AT24C256 interface circuit figure;
Fig. 4 is RS-485 bus communication module;
Fig. 5 is two kinds of message frame format charts.
Embodiment
Mine power supply monitoring device, it comprises: analog quantity acquisition circuit, input and output circuit, communication interface circuit, via memory interface circuit, low-pass filter circuit, man-machine interface, isolated drive circuit, main control unit, installation's power source module, it is characterized in that: analog quantity acquisition circuit by three-phase alternating current information through PT, CT is transferred to device interface terminal, after isolated variable, convert the rational signal of telecommunication to and be transferred to microprocessing unit through low-pass filter circuit and D/A converting circuit again, can realize the collecting work of analog information, can realize the real-time control on off state by input and output module simultaneously, the monitoring of the analog quantity to different switches is being transmitted by communication interface, finally can operate in man-machine interface.
Mine power supply monitoring device entirety control block diagram and main circuit schematic diagram are as depicted in figs. 1 and 2.This information monitoring device is mainly made up of parts such as ARM microcontroller, memory cell, keyboard interface, LCD display module, communication modules, as shown in Figure 1.Microcontroller adopts the ARM7TDMI-S chip LPC2148 of the support real-time simulation of NXP company, and the embedded system based on arm processor is applied in monitoring mining device, has the features such as integrated level is high, the speed of service is fast, real-time.LPC2148 inner integrated 512KBFLASH and 32KBRAM, at this external non-volatile ferromagnetic store AT24C256, improved information security reliability.Man-machine interaction and LCD MODULE mainly realize the human-machine operation of parameter input and display interface.Owing to being subject to the impact of Minepit environment, therefore the hardware designs of RS-485 bus is proposed to new interference protection measure.
Main control unit is the microcontroller based on 32/16 ARM7TDMI-S CPU of a support Embedded Trace, has high speed FLASH memory.The memory interface of 128 bit widths and unique accelerating structure can move 32 codes under maximum clock.
Aspect protection algorithm and data processing, DSP28335 has powerful function, in the time carrying out analog acquisition, mainly contains two kinds, as shown in Figure 2:
Voltage signal acquisition
Three-phase alternating voltage signal takes out required voltage signal by PT, is then transformed into the voltage signal of 7.07V by three groups of LCTV52CF, is input in DSP28335 through low-pass filter circuit and analog to digital conversion circuit.
Current signal gathers
Three-phase alternating current signal takes out required current signal by CT, the voltage signal that is then transformed into 7.07V by four groups of LCTA51BF (is wherein got three-phase current signal conversion for three groups, get zero sequence current signal conversion for one group), be input in DSP28335 through low-pass filter circuit and analog to digital conversion circuit.
Memory circuit is as Fig. 3, and the AT24C256 ferroelectric memory of employing is as the data buffer of monitoring device, and application nonvolatile storage technologies, stores data power-off and can preserve 10 years, and transmission real-time is good.Ferroelectric memory has parallel interface, SPI (Serial Pheripheral Interface) and I2C (Intel IC Interface) interface three types.Can expand and act charitably because of I2C bus, simple circuit, therefore adopt the memory of this interface.
Man-machine interaction and LCD MODULE adopt SSD1289, and this module core is 240RGB × 320TFT lcd controller, and display effect is good, meet pit gear and show requirement.Human-computer interaction module adopts independent button and touch-screen compatibility mode, button reaches essential safe type requirement, touch-screen adopts ADS7843 interface chip, ADS7843 is a 12 analog to digital converters with synchronous serial interface, under 125kHz throughput rate and 2.7V voltage, power consumption is 750 μ W, in low power consuming devices, is widely used.
RS485 bus communication circuit is as Fig. 4, and in order to strengthen antijamming capability and the stability of communication, the author has adopted two-way TVS, can absorb instantaneous large pulse power at both forward and reverse directions, protection signal of communication.Adopt High-Speed Coupled Device simultaneously, effectively suppressed signal interference.
Pit gear mostly adopts complete equipment, or non-part complete set of equipments is transformed.For industrial RS-485 interface, how modification scheme is by standard MODBUS agreement.The author, by transformation monitoring device, monitors the information of different agreement, has solved accurately and effectively the incompatible problem of communication protocol.Now two kinds of agreements are monitored, agreement one is feed II communication protocol 2.0, and agreement two adopts MODBUS RTU, as Fig. 5.
Above-mentioned agreement is two kinds of communication protocols that run in Practical Project, and when being applied in same system, the author adopts the mode of protocol conversion to process in Embedded Software Design, efficiently solves the problem that pit gear does not match, communication protocol is incompatible.
?after Software for Design completes, adopt RS-485 to turn USB bsp driver is debugged.For message format one and message format two, relevant parameter is set.
Claims (1)
1. mine power supply monitoring device, its feature comprises: analog quantity acquisition circuit, low-pass filter circuit, isolated drive circuit, main control unit, via memory interface circuit, input and output circuit, installation's power source module, man-machine interface, communication interface circuit, it is characterized in that: analog quantity acquisition circuit collects three-phase alternating voltage, current signal, this signal is through low-pass filter circuit, isolated drive circuit, by being input to main control unit after AD modular converter, main control unit and via memory interface circuit are realized information recording through iic bus, and by input and output circuit, controlled device is operated, in device, the power supply of all circuit provides by power module, can operate by man-machine interface, this device and each equipment room are realized information sharing and command transfer by communication interface circuit.
2. mine power supply monitoring device according to claim 1; it is characterized in that: described analog quantity acquisition circuit gathers three-phase voltage, current information by instrument transformer; signal is transformed into the satisfactory signal of telecommunication through converter; wherein voltage transformer adopts model TR1176-4C; protective current instrument transformer adopts model TR0176-4C; measure current transformer and adopt model TR0176-4C; voltage voltage changer adopt model LCTV52CF, electric current voltage changer adopt model LCTA51BF.
3. mine power supply monitoring device according to claim 1, is characterized in that: described isolated drive circuit is to have photoisolator, electromagnetic absorption device, and main chip has 6N137, TLP521, TAIYO-DDLCZFBM.
4. mine power supply monitoring device according to claim 1, is characterized in that: described main control unit is made up of with the TMS320F28335 chip two large divisions who realizes information processing the ARM7LPC2148 chip of realizing task management.
5. mine power supply monitoring device according to claim 1, is characterized in that: the acp chip of described via memory interface circuit is ferroelectric memory AT24C256.
6. mine power supply monitoring device according to claim 1, it is characterized in that: described input and output circuit is respectively, and the relay of outputing that to be NC4D-JP by model open into relay is DSP2a-L2 with model is connected with controlled device, realizes on off state and monitors and remote control function.
7. mine power supply monitoring device according to claim 1, is characterized in that: described power module model is VFB1215MP.
8. mine power supply monitoring device according to claim 1, is characterized in that: described man-machine interface is made up of the very color liquid crystal display of TFT1289 and 4 × 4 buttons.
9. mine power supply monitoring device according to claim 1, it is characterized in that: described communication interface circuit is and the Key Circuit of each intelligent object communication, the isolator that this interface circuit is 6N137 by the sending and receiving end of main control unit through model is connected with the control chip that model is MAX485CSA, then is connected with RS-485 port through the Transient Suppression Diode that model is SMBJ5.0CA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320836837.0U CN203951259U (en) | 2013-12-18 | 2013-12-18 | Mine power supply monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320836837.0U CN203951259U (en) | 2013-12-18 | 2013-12-18 | Mine power supply monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203951259U true CN203951259U (en) | 2014-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320836837.0U Expired - Fee Related CN203951259U (en) | 2013-12-18 | 2013-12-18 | Mine power supply monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109523715A (en) * | 2018-10-19 | 2019-03-26 | 西安科技大学 | A kind of self-service express delivery cabinet based on Internet of Things and post part, pickup method |
-
2013
- 2013-12-18 CN CN201320836837.0U patent/CN203951259U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109523715A (en) * | 2018-10-19 | 2019-03-26 | 西安科技大学 | A kind of self-service express delivery cabinet based on Internet of Things and post part, pickup method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20151218 |
|
| EXPY | Termination of patent right or utility model |