CN101752833A - State monitoring protection device - Google Patents
State monitoring protection device Download PDFInfo
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- CN101752833A CN101752833A CN200810207324A CN200810207324A CN101752833A CN 101752833 A CN101752833 A CN 101752833A CN 200810207324 A CN200810207324 A CN 200810207324A CN 200810207324 A CN200810207324 A CN 200810207324A CN 101752833 A CN101752833 A CN 101752833A
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Abstract
The invention relates to a state monitoring protection device, which belongs to the field of measurement. The state monitoring protection device comprises a sensor. The invention is characterized in that: the sate monitoring protection device is a three-wire loop dual-channel transducer which transforms a bushing vibration signal acquired by a sensor system into a corresponding signal of between 4 and 20mA; the signal can be directly output to a fault diagnosis system, a DCS system, a paperless recorder and/or an equipment monitoring instrument; the state monitoring protection device carries out data communication with an upper computer by a data interface; and the user can carry out configuration programming on the state monitoring protection device by the upper computer, and also can externally arrange a relay module by a chassis to flexibly select a logical approach protected by the relay. The state monitoring protection device can transform the signal acquired by the sensor system into a standard instrument signal, has the function of intelligent data analysis/processing, has remote communication function, and can be widely used in the measurement/monitoring field of various bushing vibration (speed/intensity) monitoring systems.
Description
Technical field
The invention belongs to fields of measurement, relate in particular to a kind of state monitoring protection device that is used for large-scale running unit.
Background technology
The change system that modern chemical industry sparetime university produces has continuously, at a high speed, characteristics such as complicated, large-scale, automaticity height, so when non-foreseeability fault takes place for it, can cause huge shutdown loss.Safeguard if accomplish foreseeability, can make device systems realize efficient, safety, reliable, low cost movement.
Equipment fault can divide two kinds of life-span property fault and sporadic faults usually.
Equipment produces uniform wear when moving under the condition of work of permission, wear extent when surpassing setting life-span property fault will take place, and this time of failure can be predicted usually, can recover its ability by periodic replacement, repairing, transformation.
Because of changing the fault that causes, the equipment work condition is referred to as sporadic fault.The time that sporadic fault takes place is at random, and so irregular saying, but it often starts from the unusual of equipment work condition is can be by monitor equipment status, Control work condition, take effective measure to trouble-saving generation or expansion in time.
Equipment is in running, and above-mentioned two kinds of faults normally and deposit.
Life-span property fault depends on design idea and manufacture level, based on normal running conditions; Sporadic fault is that the equipment work condition changing makes equipment be in the abnormal work state and result that equipment attrition is quickened, and the speed of wearing and tearing depends on the degree of abnormality.
Equipment running status monitoring typically refers to and takes effective ways and select reasonable position that the parameter that can represent the equipment normal operating condition is monitored, in case institute's parameter actual value of surveying then is considered as operation exception above permissible value.
Equipment running status occurs when unusual, can judge the abnormal work position and produce reason, the fault of taking corresponding measure that equipment recovery normal operating condition or eliminating have been taken place then according to the unusual form of expression, unusual parameter value and other parameter value, equipment work principle etc.
Vibrating speed sensors can be used for bearing pedestal, casing or structure are measured with respect to the absolute vibration of free space.Its output voltage is directly proportional with vibration velocity, so claim the speed mode vibrating sensor again.Its output can be the size of velocity amplitude, also can be the speed amount is become the output of displacement signal through Integral Transformation, and this measurement can be estimated the comprehensive operating mode of rotation or reciprocating mechanism.
Mechanically the most general vibration problem, great majority all come from rotor.As uneven, misalign, rub or the like.Yet for some machinery, the vibration of axle is almost passed on the cartridge housing fully, in this case, measures the vibration (velocity transducer that utilization is installed on the casing is measured) of cartridge housing, for the synthetic operation of machinery, can provide significant information.These machineries comprise: machinery and the machinery with oil film sliding bearing with rolling bearing.
The fundamental measurement principle of velocity transducer: if there is a conductor to make cutting magnetic line movement, it can produce an electromotive force that is directly proportional with movement velocity, and vibrating speed sensors is by this principle work.
In order to satisfy the needs of measuring and observing, sometimes we need vibrating speed sensors output displacement-voltage signal, this just needs to adopt the vibration velocity value signal of integrator with vibrating speed sensors, be converted to the shift value signal by an integral operation, the vibration acceleration value signal of degree of will speed up transducer is converted to the shift value signal by twice integral operation.
Up to now, in electric power (fire/hydroelectric plant), petrochemical industry, large rotating machinery equipment industries such as metallurgy, abroad/domestic manufacturer is at measuring speed, the dissimilar measuring equipment of acceleration vibration system aspect research/produced, but these equipment overwhelming majority is the signal that watt shakes of transducer output that will collect carries out simple amplification/teletransmission, deliver to the central monitoring device that is arranged in the control room, carry out the regular/conversion of signal again by central monitoring device, offer computing/control module or unit, carry out corresponding calculated, control, monitoring or data record, because measurement data criteria of right and wrong amount signal in transmission course, run into the long or big situation of on-the-spot electromagnetic interference of circuit, bigger distortion/distortion can take place in the analog measurement signal that is transmitted, when serious even can cause the supervisory control system misoperation; Simultaneously, because the criteria of right and wrong amount signal of transmission, brought difficulty for the Interface Matching of follow-up instrument, device, increased middle signal specification coupling link, both weakened the intensity/precision of original measuring-signal, increase intermediate link equipment and fault origination point again, caused the increase of one-time investment expense, also influenced safe, stable, the long-time running of large-scale unit.
Summary of the invention
Technical problem to be solved by this invention provides a kind of state monitoring protection device; the signal that watt shakes that it can collect sensing system; be converted into the instrument signal of standard; and possesses intelligent data analysis/processing capacity; possesses remote communicating function; the sensor output signal of speed/acceleration Vibration-Measuring System the D/A conversion process be can be carried out, fault diagnosis system, DCS system, recording instrument without paper and/or monitoring of equipment instrument directly it outputed to.
Technical scheme of the present invention is: a kind of state monitoring protection device is provided, comprise transducer, it is characterized in that: described state monitoring protection device is the binary channels transmitter of a three-wire system loop, it is converted into corresponding 4～20mA signal with watt shell vibration signal that sensing system collects, and this signal can directly output to fault diagnosis system, DCS system, recording instrument without paper and/or monitoring of equipment instrument; Described state monitoring protection device carries out data communication through data-interface and host computer, and the user can carry out configuration programming to state monitoring protection device by host computer, also can be by the logical course of the flexible selective relay protection of the external relay module of cabinet.
Its state monitoring protection device comprises two watts of shake monitoring and protecting passage, input and output and relay board, power module and display modules at least.
Its watt monitoring and protecting passage that shakes comprises speed vibrating sensor, channel interior integrator, high pass filter, eight rank low pass filters, vibration signal processing and signal output function module at least.
Described watt of monitoring and protecting passage that shakes comprises that at least one is used to control the MCU module with data processing; Described input signal is sent into the MCU module through signal input module, common mode inhibition module, isolation module, amplification and the first high low pass filtered module, integration module, the second high low-pass filtering module, A/D modular converter; After the data processing of input signal through the MCU module, a route D/A modular converter exports the voltage trim module to, forms the voltage output signal; Change through U/I on another road, forms current output signal; The MCU module is directly exported the output of one tunnel alarm signal; Result after the MCU module data is handled carries out data communication through data-interface and host computer.
Described data-interface is RS232 interface or RS485 interface.
Between described signal input, signal output module and MCU module, isolated location is set respectively, constitute the full isolation of input/output signal, to improve the antijamming capability of whole device.
The described watt of monitoring and protecting passage that shakes adopts external velocity transducer, and its transducer sensitivity is 10mv/mm/s to 35mv/mm/s.
Outside waterproof, explosion-proof, the dust-proof type cabinet of adopting of described state monitoring protection device, degree of protection reaches IP66/IP67.
Compared with the prior art, advantage of the present invention is:
1. directly the output signal of velocity transducer is converted to the instrument signal of standard at the scene, can reduce the loss of signal in the transmission course first, help improving the overall precision of supervisory control system, second made things convenient for the interface kit work of follow-up instrument, reduced the quantity of non-standard equipment, help whole system buying, supporting, install, debugging, operation and maintenance;
2. directly carry out data processing at the scene and export the measuring-signal that intelligence instrument can be discerned, improved antijamming capability greatly, the reliability of acquired signal is improved, also help to adopt various high-performance, intelligentized control/display terminal, help to improve the hardware/technical merit of whole monitoring system;
3. adopt method/structure with upper machine communication/setting; made things convenient for the long-range setting/debugging/Control work of whole system; both can carry out configuration programming to state monitoring protection device by host computer; also can improve the setting/debugging/Control work efficient of whole system greatly by the logical course of the flexible selective relay protection of the external relay module of cabinet.
Description of drawings
Fig. 1 is a circuit module structural representation of the present invention;
Fig. 2 is the workflow schematic diagram of apparatus of the present invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Among Fig. 1, the monitoring and protecting passage that watt shakes of this device comprises that at least one is used to control the MCU module with data processing; Described input signal is sent into the MCU module through signal input module, common mode inhibition module, isolation module, amplification and the first high low pass filtered module, integration module, the second high low-pass filtering module, A/D modular converter; After the data processing of input signal through the MCU module, a route D/A modular converter exports the voltage trim module to, forms the voltage output signal; Change through U/I on another road, forms current output signal; The MCU module is directly exported the output of one tunnel alarm signal; Result after the MCU module data is handled carries out data communication through data-interface and host computer.
Described data-interface is RS232 interface or RS485 interface.
Between described signal input, signal output module and MCU module, isolated location is set respectively, constitute the full isolation of input/output signal, to improve the antijamming capability of whole device.
During actual enforcement, its input isolated location can be selected ISO-124 for use, and it is exported, and isolated location is optional to be used up/the electric coupling isolation module.
After adopting above-mentioned modular structure, whole state monitoring protection device is the binary channels transmitter of a three-wire system loop, it is converted into corresponding 4～20mA signal with watt shell vibration signal that sensing system collects, and this signal can directly output to fault diagnosis system, DCS system, recording instrument without paper and/or monitoring of equipment instrument; Described state monitoring protection device carries out data communication through data-interface and host computer, and the user can carry out configuration programming to state monitoring protection device by host computer, also can be by the logical course of the flexible selective relay protection of the external relay module of cabinet.
Its state monitoring protection device comprises two watts of shake monitoring and protecting passage, input and output and relay board, power module and display modules at least.
Its watt monitoring and protecting passage that shakes comprises speed vibrating sensor, channel interior integrator, high pass filter, eight rank low pass filters, vibration signal processing and signal output function module at least.
The monitoring and protecting passage that watt shakes adopts external velocity transducer, and its transducer sensitivity is 10mv/mm/s to 35mv/mm/s.
Waterproof, explosion-proof, dust-proof type cabinet are adopted in the outside of whole state monitoring protection device, and degree of protection reaches IP66/IP67, to adapt to on-the-spot abominable operational environment.
Among Fig. 2, provide the workflow diagram of whole device, after starting working, at first carried out System self-test, carry out A/D sampling, digital filtering and D/A conversion then, carry out numeric ratio and judge by the MUC module again, exceed setting range as numerical value, then output alarm signal, otherwise whether carry out the logic determines of configuration, in this way, then enter configuration branch module, otherwise directly return the A/D sampling element; After configuration branch module is finished, return the A/D sampling element equally.
Because the realization of above-mentioned various hardware circuit modules, software workflow for those of ordinary skill in the art, all belongs to prior art; Those skilled in the art after fully understanding, grasp invention thinking of the present invention and method, can reproduce the technical program without creative work, fully so relevant physical circuit annexation and operation principle are no longer narrated at this.
Because the present invention has adopted technique scheme, the antijamming capability of this device is greatly enhanced, and its every index that can reach is as follows:
1, precision: 0.1%
2, maximum range: 1000um
3, bandwidth (high low pass): 0～1000Hz
4, alarm settings precision: ± 0.1%
5, alarm settings repeatability: 0.1%
6, power supply ginseng ripple coefficient the: in＜20mvp-p
7, whole instrument rated power:＜5W, low-power consumption
8, can be by host computer and display panel configuration
9, input impedance:＞30K Europe
10, two passage alarm signals can be carried out the laggard line output control of logical relation, improve the reliability of alarm relay greatly
11, can pass through the RS485 bus, can support 128 whiles to communicate by letter at most with host computer
12, the parameter of state monitoring protection device can be carried out configuration by host computer:
1), range, warning alarming value, danger warning value, warning delay time, ann reset mode etc. can be changed at any time by the host computer configuration.
2), can be on host computer the tendency of real time inspection Monitoring Data, system draws the tendency chart of monitoring target automatically and can preserve printing.
3), when connecing host computer, system can preserve the concrete time of origin of alert event automatically, is convenient to the user and carries out the accident diagnosis analysis.
The present invention can be widely used in the measurement/monitoring field of various watts of (speed/earthquake intensity) monitoring systems of shaking.
Claims (8)
1. a state monitoring protection device comprises transducer, it is characterized in that:
Described state monitoring protection device is the binary channels transmitter of a three-wire system loop, it is converted into corresponding 4～20mA signal with watt shell vibration signal that sensing system collects, and this signal can directly output to fault diagnosis system, DCS system, recording instrument without paper and/or monitoring of equipment instrument;
Described state monitoring protection device carries out data communication through data-interface and host computer, and the user can carry out configuration programming to state monitoring protection device by host computer, also can be by the logical course of the flexible selective relay protection of the external relay module of cabinet.
2. according to the described state monitoring protection device of claim 1, it is characterized in that described state monitoring protection device comprises two watts of shake monitoring and protecting passage, input and output and relay board, power module and display modules at least.
3. according to the described state monitoring protection device of claim 2, it is characterized in that the described watt of monitoring and protecting passage that shakes comprises speed vibrating sensor, channel interior integrator, high pass filter, eight rank low pass filters, vibration signal processing and signal output function module at least.
4. according to the described state monitoring protection device of claim 2, it is characterized in that the described watt of monitoring and protecting passage that shakes comprises that at least one is used to control the MCU module with data processing;
Described input signal is sent into the MCU module through signal input module, common mode inhibition module, isolation module, amplification and the first high low pass filtered module, integration module, the second high low-pass filtering module, A/D modular converter;
After the data processing of input signal through the MCU module, a route D/A modular converter exports the voltage trim module to, forms the voltage output signal; Change through U/I on another road, forms current output signal;
The MCU module is directly exported the output of one tunnel alarm signal;
Result after the MCU module data is handled carries out data communication through data-interface and host computer.
5. according to the described state monitoring protection device of claim 4, it is characterized in that described data-interface is RS232 interface or RS485 interface.
6. according to the described state monitoring protection device of claim 4; it is characterized in that between described signal input, signal output module and MCU module; isolated location is set respectively, constitutes the full isolation of input/output signal, to improve the antijamming capability of whole device.
7. according to the described state monitoring protection device of claim 2, it is characterized in that the described watt of monitoring and protecting passage that shakes adopts external velocity transducer, its transducer sensitivity is 10mv/mm/s to 35mv/mm/s.
8. according to the described state monitoring protection device of claim 1, it is characterized in that outside waterproof, explosion-proof, the dust-proof type cabinet of adopting of described state monitoring protection device, degree of protection reaches IP66/IP67.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810207324A CN101752833A (en) | 2008-12-19 | 2008-12-19 | State monitoring protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810207324A CN101752833A (en) | 2008-12-19 | 2008-12-19 | State monitoring protection device |
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| CN101752833A true CN101752833A (en) | 2010-06-23 |
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| CN200810207324A Pending CN101752833A (en) | 2008-12-19 | 2008-12-19 | State monitoring protection device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413165A (en) * | 2010-08-10 | 2012-04-11 | 通用电气公司 | Diagnostics using sub-metering device |
| CN103558797A (en) * | 2013-09-03 | 2014-02-05 | 国家电网公司 | Off-limit protection realization method of state monitoring device |
| US9218631B2 (en) | 2010-02-15 | 2015-12-22 | General Electric Company | Low cost and flexible energy management system defined in a single unitary housing |
| CN105759750A (en) * | 2015-12-09 | 2016-07-13 | 重庆川仪自动化股份有限公司 | Analog quantity input module of DCS |
| CN110542475A (en) * | 2019-08-08 | 2019-12-06 | 杨腾江 | digital vibration signal intelligent transmitter |
-
2008
- 2008-12-19 CN CN200810207324A patent/CN101752833A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9218631B2 (en) | 2010-02-15 | 2015-12-22 | General Electric Company | Low cost and flexible energy management system defined in a single unitary housing |
| CN102413165A (en) * | 2010-08-10 | 2012-04-11 | 通用电气公司 | Diagnostics using sub-metering device |
| CN102413165B (en) * | 2010-08-10 | 2016-12-07 | 海尔美国电器解决方案有限公司 | Use the diagnosis of submeter device |
| CN103558797A (en) * | 2013-09-03 | 2014-02-05 | 国家电网公司 | Off-limit protection realization method of state monitoring device |
| CN105759750A (en) * | 2015-12-09 | 2016-07-13 | 重庆川仪自动化股份有限公司 | Analog quantity input module of DCS |
| CN110542475A (en) * | 2019-08-08 | 2019-12-06 | 杨腾江 | digital vibration signal intelligent transmitter |
| CN110542475B (en) * | 2019-08-08 | 2021-10-15 | 杨腾江 | Digital vibration signal intelligent transmitter |
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Open date: 20100623 |