CN203067092U - Diesel engine safety protection controller - Google Patents
Diesel engine safety protection controller Download PDFInfo
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- CN203067092U CN203067092U CN 201220570366 CN201220570366U CN203067092U CN 203067092 U CN203067092 U CN 203067092U CN 201220570366 CN201220570366 CN 201220570366 CN 201220570366 U CN201220570366 U CN 201220570366U CN 203067092 U CN203067092 U CN 203067092U
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Abstract
The utility model relates to the technical field of diesel engine safety protection, and discloses a diesel engine safety protection controller. The diesel engine safety protection controller comprises a main control modular structure circuit, an auxiliary control modular structure circuit, a switching value signal acquisition circuit, an emergency shutdown electromagnetic valve line fault detection circuit and a safety protection control alarm circuit, wherein the main control modular structure circuit is connected with the auxiliary control modular structure circuit through an RS485 communication interface. The diesel engine safety protection controller can carry out monitoring and alarming on certain faults intelligently, achieves automatic emergency shutdown protection under overspeed and other abnormal conditions of a diesel engine, improves safety and reliability of operation of a diesel engine system, and improves control precision.
Description
[technical field]
The utility model relates to diesel engine security protection technology field, especially relates to a kind of diesel engine safety protection control device.
[background technique]
The various functions of diesel engine safety protection at present adopt discrete device or versatility PLC to realize mostly; though solved diesel engine safe operation problem to a certain extent; but owing to do not possess function such as signal line detecting fault, so combined reliability still needs further to promote.The develop rapidly of domestic economy is widened the application of high-end equipments such as large-scale ocean going vessel and heavy engineering machinery rapidly; power system is also more and more higher as its technical need of core of equipment; domestic with international related specifications requires also more and more stricter, provides more efficient, safer power system safety protection to become requisite constituent element.
[summary of the invention]
For solving because the control surface of safety protection control system in the Diesel Engine Control case is single, cause the low problem of safety protection coefficient.The utility model provides a kind of diesel engine safety protection control device; Independent safety protection control device can be increased on the basis of conventional diesel engine supervisory system and redundancy protecting control under the abnormal conditions can be effectively realized; compare integration capabilities such as (switching value) line fault detecting that possessed sensor, the detecting of emergency shutdown operational order line fault, field bus communication, system failure warning with similar conventional apparatus, significantly improved Security, the reliability of diesel engine system operation.The utlity model has simple in structure, more cheap, the comprehensive applicability of cost is stronger, can satisfy the application of high-speed high-power diesel engine in marine system, improves Security, the reliability of diesel engine operation and safety protection device work.
For achieving the above object, the utility model adopts following technological scheme:
A kind of diesel engine safety protection control device, comprise: main control module structural circuit, from control modular structure circuit, switching value signal acquisition circuit, emergency shutdown solenoid valve circuit fault monitoring circuit, safety protection control warning circuit, described main control module structural circuit links to each other by the RS485 communication interface and from control modular structure circuit; Described main control module structural circuit first input end links to each other by the sensor of switching value signal acquisition circuit with diesel engine output switching value signal; Described main control module structural circuit second input end links to each other with electromagnetic valve driving circuit of diesel engine by emergency shutdown solenoid valve circuit fault monitoring circuit; Described main control module structural circuit the 3rd input end links to each other with the operating button group by the operational module interface circuit; Described main control module structural circuit four-input terminal links to each other with basic supervisory system disablement signal, diesel engine run signal by signal interface circuit; Described main control module structural circuit output terminal links to each other with the safety protection control warning circuit by output interface circuit.
A kind of diesel engine safety protection control device; described main control module structural circuit is made up of central processing unit (CPU) circuit, communicating circuit, watchdog circuit, sensor measuring circuit, line fault testing circuit, operational order testing circuit, parameter configuration circuit etc., and main core devices has W78E52D, MAX813L, MAX485, LM124, CD4099, UL2803,4N25, LM2596,7812 etc.Main control module is gathered various sensor states signals, line fault signal, operational order, configuration parameter etc., carry out logical process according to application program, result after the processing drives control relay circuit on the one hand and exports, on the other hand according to the encapsulation of MODBUS-RTU protocol format and by the output of RS485 communication interface.
A kind of diesel engine safety protection control device describedly is made of at least one display modular structure function circuit from control modular structure circuit; Described display modular structure function circuit adopts single-chip microcomputer W78E52D, communication interface MAX485, power drive UL2803, display driver MAX7219, LED light, nixie tube to constitute; Described have by the RS485 communication interface and will receive the data that main control module sends from the control module; communications protocol is resolved by appointment; have rotating speed, emergency shutdown are reported to the police, line fault is reported to the police information by the indication of classifying of LED light, nixie tube, finally reach the purpose of classified inquiry.
A kind of diesel engine safety protection control device, described switching value signal acquisition circuit is connected to form by Boolean value output sensor S1 and two comparators, and each comparator (integrated operational amplifier) LM124 links to each other with optocoupler 4N25; And Boolean value output sensor S1 output terminal links to each other with the inversion signal input end of first comparator, and links to each other with the forward signal input end of second comparator.
A kind of diesel engine safety protection control device; described emergency shutdown solenoid valve circuit fault monitoring circuit takes the not driven period of solenoid valve to carry out the line fault detecting; being linked to each other with comparator with bleeder circuit that resistance R 1 constitutes by electromagnetic valve coil V1 constitutes, and comparator is connected to form by LM124 integrated operational amplifier and relevant configuration resistance with optocoupler 4N25.
A kind of diesel engine safety protection control device; described main control module structural circuit is encapsulated in the Al-alloy casing, and the interface configuration of main control module structural circuit comprises: 18 of input lead terminals, 13 of output pin terminals, 3 of communication lead terminals, parameter configuration toggle switch, test button, tutorial light.
A kind of diesel engine safety protection control device, described main control module input lead terminal be definition successively from left to right: positive source; positive source; power cathode; power cathode; magnetoelectric tachometric transducer; the instruction of remote control emergency shutdown; the other emergency shutdown instruction of machine; reset instruction; basic supervisory system fault state; the diesel engine running state; more control instruction; the instruction of examination lamp; the noise reduction instruction; the detecting of anxious power failure magnet valve A line fault; the detecting of anxious power failure magnet valve B line fault; the too high sensor of switching value form cooling water temperature; the high sensor of switching value form crankcase pressure; switching value form lubricating oil pressure is crossed low sensor.
A kind of diesel engine safety protection control device, described main control module output pin terminal be definition successively from left to right: position 0 for signal common port, position 1 for emergency shutdown drive signal, position 2 for buzzer drive signal, position 3 for signal common port, position 4 for controller synthesis is reported to the police, position 5 for main control module power failure, position 6 for main control module lost efficacy, position 7 for line fault integrated alarm, position 8 for the too high warning of cooling water temperature, position 9 are reported to the police for crankcase pressure is high, position 10 is for lubricating oil pressure is crossed low warning, position 11 is the signal common port for overspeed alarming, position 12.
A kind of diesel engine safety protection control device, described main control module communication lead terminal be definition successively from left to right: RS485 bus GND, RS485 bus B, RS485A bus.
A kind of diesel engine safety protection control device, described main control module parameter configuration toggle switch be definition successively from left to right: position 1 is for diesel engine nominal operation rotating speed is selected, speed probe is detected the flywheel number of teeth under the different diesel version situations of setting in order to make up for 34 of diesel engine overspeed alarming setting value and rated speed value percentage, positions in position 2.
A kind of diesel engine safety protection control device, described main control module tutorial light: green for working power is indicated, redness is the indication of RS485 communication link state.
A kind of diesel engine safety protection control device, described display modular structure adopt the aluminum alloy casing encapsulation, the protection of display floater PVC pad pasting, and the functions of modules interface comprises: power supply input lead terminal, communication interface lead terminal, display window.
A kind of diesel engine safety protection control device, the display window content comprises in the described display modular: the instant rotating speed 0-9999RPM of diesel engine; the overspeed alarming indication; speed probe line fault is reported to the police and is indicated; lubricating oil pressure is crossed the low indication of reporting to the police; lubricating oil pressure is crossed low sensor line fault warning indication; the high indication of reporting to the police of crankcase pressure; the high sensor line fault of crankcase pressure is reported to the police and is indicated; the too high warning indication of cooling water temperature; the too high sensor line malfunction alarm indication of cooling water temperature; safety protection control device resultant fault is reported to the police and is indicated; the indication of emergency shutdown solenoid valve circuit malfunction alarm; basic monitoring/alarm system working power indicating fault; basic monitoring/alarm system failure of removal indication; the indication of remote control emergency shutdown button line fault; the indication of the other emergency shutdown button of machine line fault; more control state indication; the indication of diesel engine running state; the working power indication; the indication of emergency shutdown state.
A kind of diesel engine safety protection control device, described basic supervisory system are the supervisory system that satisfies the basic operating conditions of diesel engine beyond the safety protection control device.
Owing to adopt aforesaid technological scheme, the utlity model has following good effect:
A kind of diesel engine safety protection control device; be the diesel engine safety protection device of a kind of RS485 of having field bus communication, single-chip microcomputer Digital Control characteristics, be used for the diesel engine hypervelocity, lubricating oil pressure is low excessively, cooling water temperature is too high, the automatic protection control under the high abnormal conditions of crankcase pressure.This type controller adopts enhancement mode 51 series monolithics to be the control core; configuration tach signal shaping circuit, Boolean value output sensor state-detection and measurement circuitry fault monitoring circuit, fingertip control command detection and line fault circuit for detecting, protection control drive circuit, RS485 communicating circuit, classification state display driver circuit etc.; automatic emergency stop-working protection by under the abnormal conditions such as integrated logic processing back realization diesel engine hypervelocity improves diesel engine system safety in operation, reliability.
Safety protection demand when the utility model uses digital control technology in conjunction with self diesel engine operation designs.Diesel engine safety protection control device is minimum to be used by 1 main control module, 1 and forms from control module (data demonstration) two-part; main control module is responsible for signals collecting, logical process, control output; be responsible for the classification indication of information such as state, warning from the control module; with main control module and display modular construction system integral body, can be used for the classified information prompting of zones of different position by the RS485 bus simultaneously according to application demand at a plurality of identical display modulars of RS485 bus configuration.
The utility model and existing security system are more integrated, main control module with only need a connection just can finish transmission and the reception of data from the control module, communication applications MODBUS-RTU agreement between the module, the protocol format highly versatile, be easily understood, flexibility height, easy access and maintenance.Inner main control CPU chip is selected enhancement mode 51 single-chip microcomputers of reasonable price for use; its function satisfies processing and the computing to existing diesel safety protection relevant parameter fully; improved control accuracy in the practical application greatly; it is more convenient to operate; Diesel Engine Control only needs artificial operation starting and stop botton; in the diesel engine operation work, monitoring and warning to some faults that the security controller can intelligence, operator only need to do monitoring to display system and get final product with record.
[description of drawings]
Fig. 1 diesel engine control system structural drawing;
Among the figure: 1, basic supervisory system, 2, sensor, 3, diesel engine, 4, the safety protection executive component, 5, the safety protection control system, 6, monitor executive component substantially.
Fig. 2 safety protection control device is used schematic circuit diagram;
Fig. 3 switching value signal acquisition circuit figure;
Fig. 4 emergency shutdown solenoid valve circuit fault monitoring circuit figure;
Fig. 5 controller system fault and RS485 communicating circuit figure;
Fig. 6 main control module (safety protection control device) circuit structure skeleton diagram
Fig. 7 is from control module (display modular) circuit structure skeleton diagram;
Fig. 8 main control module (safety protection control device) structural panel schematic representation;
Fig. 9 is from control module (display modular) structural panel schematic representation.
[embodiment]
Can explain the utility model in more detail by following embodiment;
The utility model is to do independent safety protection to use in the other control system of marine diesel oil generator machine.During the diesel engine operation; by monitoring constantly pressure, the temperature of fuel oil/lubricating oil/seawater/fresh water, the running speed of fuel oil/lubricating oil/seawater/fresh water are isoparametric; health status in the time of can making the staff effectively identify the diesel engine operation; by independently safety system is set, further improve Security, the reliability of diesel engine operation in the ocean going vessel.
As accompanying drawing 1 brief overview the framework of whole system; 1～n various kinds of sensors 2 is installed on the diesel engine 3 to be gathered and is transmitted to guarantee all kinds of monitor datas; the data that sensor 2 is gathered comprise that analogue signal (0-5V or 4-20mA)/switching value signal (logic state 0 and 1) enters basic supervisory system 1 respectively and safety protection control system 5 carries out calculation process, require processing result is sent to safety protection executive component 4, monitors executive component 6 substantially and finish system's closed loop control according to applied logic.
Wherein, lubricating oil pressure, cooling water temperature have been done the pre-alarm of the first order in the basic supervisory system, system only carries out acousto-optic hint when pre-alarm occurring, does not carry out urgent processing out of service.Lubricating oil pressure is low excessively in the safety protection control system, cooling water temperature is too high is to report to the police in the second level, when occurring illustrating that the diesel engine safe condition is very dangerous when such is reported to the police, need take the emergency shutdown protective measure when therefore reporting to the police.
Wherein, basic supervisory system lost efficacy and imported instruction; provide this instruction inlet opening to be used for the basic supervisory system of safety protection control system identification and whether be in normal working; alarm signal output is also arranged during safety protection control thrashing; can realize mutual monitoring by such alarm signal between two systems, purpose is to improve the system synthesis reliability.
Wherein, the input that moves, more controls signal is as follows:
Run signal: this signal is from basic supervisory system, then exports this signal and enters the safety protection control device when basic supervisory system recognizes the diesel engine running.Speed probe has also detected signal if the safety protection control device detects this signal while self, illustrate that then safety protection control device tachometric survey circuit working is normal, otherwise the explanation tachometer circuit breaks down.
More control signal: promote mainly into occasion such as diesel engine, Emergency generator as boats and ships, therefore code requirement arranges this input interface not allowing diesel engine to stop under the special emergency condition except hypervelocity.After the input of this signal, except hypervelocity, all can not cause the diesel engine emergency shutdown, but fault still can activation sound when occurring, the light warning.
The utility model is according to CCS steel seagoing vessel classification rules 2006(the 4th fascicle) requirement sensor measurement line fault reported to the police and cause that the warning (as: overspeed alarming, lubricating oil pressure are crossed low warnings, the too high warning of water temperature, the high warning of crankcase pressure) of motor emergency shutdown protection is integrated into the safety protection control part, the separate configurations of safety protection control function makes system more perfect.
Wherein, overspeed protection refers to that diesel engine occurs may causing fatal crass's serious accident after the hypervelocity, so this alarm and protection need be set.Main control module inserts sensor and carries out tachometric survey, and sensor is installed in diesel engine flywheel place, and central processor CPU obtains pulse number and draws current actual speed according to formula by the high-speed counting function; Formula: (each second high-speed counting value * 60) the ÷ flywheel number of teeth=rotating speed.
Because it is long that high-speed counting obtains an actual speed measurement time 1 second, therefore per second high-speed counting value is reduced to per 250 millisecond meter numerical value carries out computing, and deformation formula is: (per 250 milliseconds of high-speed counting value * 240) the ÷ flywheel number of teeth=rotating speed.Transform by this mode, can realize recording in 1 second 4 actual speed values, improve the sensitivity of system protection function.
Central processor CPU
(single-chip microcomputer W78E52D)The current tachometer value that measures is compared with the hypervelocity threshold value; when actual speed continuous three times greater than hypervelocity during thresholding; drive emergency shutdown circuit and self-locking; the fuel oil of control solenoid valve shuts diesel engine and air are realized forcing to stop; generation sound, light alarm operator and other system simultaneously, operator just can remove self-locking state by the input reset instruction after diesel engine reliably stops.
Controller need be set the flywheel number of teeth, hypervelocity threshold value from the above, so controller has disposed toggle switch for such parameter is set.Hypervelocity threshold value=rated speed value * hypervelocity percentage.
Wherein, lubricating oil pressure is crossed low protection, if lubricating oil pressure occurred might causing serious equipment accident such as scuffing of cylinder bore, seize when low when referring to the diesel engine operation, for preventing that such emergency system is provided with lubricating oil pressure and crosses also emergency stop function of low warning.
At first central processor CPU compares actual speed and diesel engine running speed (greater than 300rpm), the current rotating speed of diesel engine illustrates then that greater than the running speed value diesel engine has been in running state, and diesel engine enters after the running state lubricating oil pressure and should reliably set up simultaneously hypotony switch sensor state is opened by normally closed often being converted to.The safety protection control system enters normal monitor state; when occurring rotating speed greater than the situation of 300rpm and the continuous 1000ms closure of hypotony switch; illustrate that severely subnormal appears in the diesel engine lubricating oil pressure; driven and the self-locking of emergency shutdown circuit this moment; the pressure diesel engine is out of service, treats can carry out after diesel engine stops the releasing self-locking that resets of artificial system.Add the 1000ms delay confirmation and judge it is the purpose of digital filtering, improve the accuracy of system, reliability.
Wherein, the high protection of crankcase pressure; if crankcase pressure occurs too high when referring to the diesel engine operation; airtight the going wrong that cylinder is described is the omen of scuffing of cylinder bore; this is very dangerous for high power engine; therefore serious pull-cylinder phenomena infringement device security occurs for avoiding, be provided with the high alarm and protection function of crankcase pressure.It is similar that this part control flow and lubricating oil pressure are crossed low-function.
Wherein, the too high protection of fresh water temperature; if referring to diesel engine when operation cooling water temperature occurs too high then the diesel engine severely subnormal is described; this is very dangerous for the high-speed high-power motor; therefore serious equipment damage occurs for avoiding, be provided with the too high alarm and protection function of cooling water temperature.It is similar that this part control flow and lubricating oil pressure are crossed low-function.
When hypervelocity, lubricating oil pressure is low excessively, cooling water temperature is too high, such signal will cause emergency shutdown protection when crankcase pressure is high; such switching value form of reporting to the police to itemize exports basic supervisory system to simultaneously; on the one hand basic supervisory system can specifically recognize and which kind of reason specifically occur and cause the emergency shutdown protection, can utilize the external communication function of basic supervisory system that this category information is sent to the boats and ships computer network on the other hand.
Wherein, the test button function provides a kind of simulation test controller hypervelocity, oil pressure is crossed low alarm and protection function.
Wherein, toggle switch is to finish in the hypervelocity function parameter to be set, and toggle switch also can be finished the configuration of such conventional parameter.
Wherein, whether examination lamp, noise reduction instruction input are namely imported this examination lamp instruction back and are forced to light all tutorial light, normal from judging all tutorial light.When system's appearance sound, when light is reported to the police, import this noise reduction instruction back system and will eliminate acoustic alarm, simultaneously the tutorial light flash of light is become lasting light, the purpose of eliminating sound is to report to the police for other to provide acoustic alarm to prepare when activating.
Wherein, emergency shutdown drives output, provides this driving signal output to be used for the high-power contactor of expansion and to drive the emergency shutdown solenoid valve.
Wherein, about safety protection control device power failure, failure of removal output signal; this signal enters basic supervisory system; on the one hand basic supervisory system can recognize security and catastrophe failure occur, can utilize the external communication function of basic monitoring that this category information is sent to the boats and ships computer network on the other hand.
Wherein, line fault integrated alarm output signal, because All Alerts subitem will make controller complexity and volume bigger with the output of switching value form, and such signal do not cause the emergency shutdown protection, therefore provides combined signal output to the line fault integrated alarm.When occurring, arbitrary warnings such as rotating speed, lubricating oil pressure are low excessively, cooling water temperature is too high, crankcase pressure is high, emergency shutdown button circuit fault all will activate line fault integrated alarm signal; this signal enters basic supervisory system; on the one hand basic supervisory system can recognize security and catastrophe failure occur, can utilize the external communication function of basic monitoring that this category information is sent to the boats and ships computer network on the other hand.
About line fault detecting, by above-mentioned situation as can be known the rotating speed, lubricating oil pressure, crankcase pressure, the correctness of cooling water temperature parameter, the validity that detect of safety protection be very important.For avoiding occurring because of problems such as the diesel engine fault that the sensor measuring circuit fault causes is failed to judge, misjudgement; the safety protection control system carries out the line fault detecting to each sensor signal that causes emergency shutdown; prompt system is in time got rid of when sensor measuring circuit breaks down, and greatly improves reliability of system operation.
1), the main control module structure, adopt the aluminum alloy casing encapsulation, configuration input, output pin terminal, parameter configuration toggle switch, test button.Referring to accompanying drawing 8
Main control module interface configuration table
| Sequence number | Title | Classification | | Remarks | |||||||
| 1 | + | Input | Positive | Lead terminal | |||||||
| 2 | + | Input | Positive source | Lead terminal | |||||||
| 3 | - | Input | Power cathode | Lead terminal | |||||||
| 4 | - | Input | Power | Lead terminal | |||||||
| 5 | 0 | Input | Speed probe | Lead terminal, magnetoelectric | |||||||
| 6 | 1 | Input | The instruction of remote control emergency | Lead terminal | |||||||
| 7 | 2 | Input | The other emergency shutdown instruction of | Lead terminal | |||||||
| 8 | 3 | Input | Reset | Lead terminal | |||||||
| 9 | 4 | Input | Basic supervisory system | Lead terminal | |||||||
| 10 | 5 | Input | The diesel engine running | Lead terminal | |||||||
| 11 | 6 | Input | More control | Lead terminal | |||||||
| 12 | 7 | Input | The instruction of examination | Lead terminal | |||||||
| 13 | 8 | Input | The noise reduction instruction | Lead terminal | |||||||
| 14 | 9 | Input | The detecting of anxious power | Lead terminal | |||||||
| 15 | 10 | Input | The detecting of anxious power | Lead terminal | |||||||
| 16 | 11 | Input | The too high sensor of cooling water temperature | Lead terminal, switching value form | |||||||
| 17 | 12 | Input | The high sensor of crankcase pressure | Lead terminal, switching value form | |||||||
| 18 | 13 | Input | Lubricating oil pressure is crossed low sensor | Lead terminal, switching value form | |||||||
| 19 | - | Communication | Power cathode | Lead terminal | |||||||
| 20 | B | Communication | The RS485 bus B | Lead terminal | |||||||
| 21 | A | Communication | RS485 bus A | | |||||||
| 22 | 0 | | Output pin | 1,2 signal common ports | Lead terminal | ||||||
| 23 | 1 | Output | Emergency shutdown drives signal | Lead terminal | |||||||
| 24 | 2 | Output | Buzzer drives signal | Lead terminal | |||||||
| 25 | 3 | | Output pin | 4 signal common ports | Lead terminal | ||||||
| 26 | 4 | Output | Controller synthesis is reported to the police | Lead terminal | |||||||
| 27 | 5 | Output | The controller power source fault | Lead terminal | |||||||
| 28 | 6 | Output | Controller lost efficacy | Lead terminal | |||||||
| 29 | 7 | Output | Line fault detecting integrated alarm | Lead terminal | |||||||
| 30 | 8 | Output | The too high warning of cooling water temperature | Lead terminal | |||||||
| 31 | 9 | Output | Crankcase pressure is high reports to the police | Lead terminal | |||||||
| 32 | 10 | Output | Lubricating oil pressure is crossed low the warning | Lead terminal | |||||||
| 33 | 11 | Output | Overspeed alarming | Lead terminal | |||||||
| 34 | 12 | | Output pin | 5,6,7,8,9,10,11 signal common ports | Lead terminal | ||||||
| 35 | Test button | Input | Simulation test hypervelocity, lubricating oil pressure are crossed low warning function | Body is installed | |||||||
| 36 | Toggle switch | Input | The Configuration Control Unit mode of operation | Body is installed | |||||||
| 37 | Power supply indicator | Output | The controller power supply indication | Body is installed | |||||||
| 38 | The link tutorial light | Output | The indication of RS485 communication link state | Body is installed |
2), adopt the aluminum alloy casing encapsulation from control module (demonstration) structure, the protection of display floater pad pasting, configuration effort power supply, RS485 communication interface.Referring to accompanying drawing 9
From control module (demonstration) interface configuration
| Sequence number | Title | Classification | Functional description | Remarks |
| 1 | 24V+ | Input | Positive source | Lead terminal |
| 2 | 24V- | Input | Power cathode | Lead terminal |
| 3 | A | Communication | RS485 bus A | Lead terminal |
| 4 | B | Communication | The RS485 bus B | Lead terminal |
| 5 | Rotating speed | Show | The instant rotating speed of diesel engine shows | 0-9999RPM |
| 6 | Overspeed alarming is shut down | Show | Control overspeed alarming and emergency shutdown indication | LED light |
| 7 | Rotating speed line fault | Show | Speed probe line fault is reported to the police | LED light |
| 8 | Oil pressure is crossed low the shutdown | Show | Lubricating oil pressure is crossed low the warning and the emergency shutdown indication | LED light |
| 9 | Oil pressure switch line fault | Show | Lubricating oil pressure is crossed low sensor line fault and is reported to the police | LED light |
| 10 | Crankcase pressure is high shuts down | Show | Crankcase pressure is high reports to the police and the emergency shutdown indication | LED light |
| 11 | Baroswitch line fault | Show | The high sensor line fault of crankcase pressure is reported to the police | LED light |
| 12 | Cooling water temperature is too high | Show | The too high warning of cooling water temperature and emergency shutdown indication | LED light |
| 13 | Coolant temperature switch line fault | Show | The too high sensor line malfunction alarm of cooling water temperature | LED light |
| 14 | The safety system resultant fault | Show | Safety protection control device resultant fault is reported to the police | LED light |
| 15 | Suddenly stop valve line fault | Show | Emergency shutdown solenoid valve circuit malfunction alarm | LED light |
| 16 | The warning power failure | Show | Basic monitoring, alarm system working power fault | LED light |
| 17 | The alarm system fault | Show | Basic monitoring, alarm system failure of removal | LED light |
| 18 | Remote control emergency shutdown line fault | Show | Remote control emergency shutdown button line fault | LED light |
| 19 | The other emergency shutdown line fault of machine | Show | The other emergency shutdown button of machine line fault | LED light |
| 20 | More control indication | Show | More control state indication | LED light |
| 21 | Standby tutorial light | Show | ? | |
| 22 | The security operation | Show | The safety protection control device is judged the indication of diesel engine running state | LED light |
| 23 | The safety system power supply | Show | The working power indication | LED light |
| 24 | Emergency shutdown | Show | The indication of emergency shutdown solenoid-driven | LED light |
3), accompanying drawing 2 is safety system application circuit schematic representation, system's minimal configuration should comprise 1 main control module (safety protection control device) and 1 from control module (safety protection display floater).
4), accompanying drawing 3 is the switching value signal acquisition circuit.This element circuit is applicable to the collection of Boolean value output sensor signal and the collection of emergency shutdown button signal; Boolean value output sensor comprises: lubricating oil pressure is crossed low sensor, the too high sensor of fresh water temperature, the high sensor of crankcase pressure, and the emergency shutdown button comprises: the other emergency shutdown button of machine, remote control emergency shutdown button.Be effective identification switch quantity sensor signal condition and detection line fault state, adopt integrated operational amplifier LM124 to construct the potential comparator circuit, draw truth table by respectively two groups of comparators being arranged different comparison current potentials, thereby judge the various states of sensor.The contrast accompanying drawing carries out following principle analysis:
In the practical application with Boolean value output sensor S1 Out let 10K resistance R 1 in parallel, R1 and main control module internal resistance R2 form bleeder circuit, line segment L1, L2 be sensor to the signal cable between the main control module, this voltage division signal enters fortune amplifier D1 inverting input and D2 in-phase input end respectively.R3, R4 compare current potential with D1 and are arranged on 10V, and R7, R8 compare current potential with D2 and be arranged on 2V.D1 inverting input, D2 in-phase input end potential value are 6V when S1 is not closed; When S1 is closed, be 0V; When L1 or L2 conjunction cable appearance interruption, be 12V.Each dotted state of circuit satisfies as following table during real work:
Can know according to last table content, when STATE1=TRUE and STATE2=TRUE, represent that sensor detection circuit is normal and S1 is not closed; When STATE1=TRUE and STATE2=FALSE, represent that sensor detection circuit is normal and S1 is closed; Represent that when STATE1=FALSE interrupting appears in sensor detection circuit.
According to writing SCM program according to above-mentioned Rule of judgment, finally finish functions such as signals collecting, judgement, warning processing, protection driving.
5) accompanying drawing 4 is emergency shutdown solenoid valve circuit detecting fault.This solenoid valve is mainly used in cutting off inlet air pathway, the fuel flow path of diesel engine; the work of this solenoid valve is only when the emergency shutdown protection occurring; the orderly closedown process is uncontrolled; such solenoid valve can't proper functioning and the phenomenon that causes accident to enlarge when avoiding the emergency shutdown situation to occur; safety protection control detects the integrity that such driving circuit for electromagnetic valve has carried out the inoperative period, and purpose is Security, the reliability of raising system operation.
This element circuit is suitable for and comprises: emergency shutdown solenoid valve A, emergency shutdown solenoid valve B.Because electric current is bigger during such solenoid valve work, therefore be not suitable for adopting the method that in driving circuit for electromagnetic valve, seals in little resistance high-power resistance acquisition sampling voltage signal and realize all the period of time line fault detecting.Consider that this solenoid-driven signal is sent by controller itself, the driven period of solenoid valve stops the method for detecting fault so take the not driven period of solenoid valve to carry out the line fault detecting.Adopt integrated operational amplifier LM124 to construct the potential comparator circuit, whether the Rule of judgment by emergency shutdown solenoid-driven control command combines with the comparator circuit result exists fault thereby judge circuit.The contrast accompanying drawing carries out following principle explanation:
Electromagnetic valve coil V1 and main control module internal resistance R1 constitute bleeder circuit, the electromagnetic valve coil D.C. resistance is about 20 ohm, the normal electrical magnet valve is the about 24V of current potential of operational amplifier D1 in-phase input end under the drive condition not, and R3, R4 are arranged on 10V with D1 comparator inverting input benchmark comparative voltage.Do not make when main control module sends emergency shutdown instruction that the KM contact is not closed, solenoid valve V1 does not work, and solenoid valve V1 drive circuit cable L1, when interrupting does not appear in L2, STATE point current potential is 5V(TRUE); Do not make when main control module sends emergency shutdown instruction that the KM contact is not closed, solenoid valve V1 does not work, but solenoid valve V1 drive circuit cable L1, L2 be when occurring interrupting, STATE point current potential is 0V(FALSE); KM make contact, solenoid valve V1 get electric work when main control module sends the emergency shutdown instruction, stop the detecting of solenoid valve V1 line fault this moment.Finally finish the line fault detecting according to above-mentioned Rule of judgment establishment single-chip microcomputer application software.
6) accompanying drawing 5 is controller (main control module) system failure and RS485 communicating circuit.This part circuit adopts MAX813, MAX485 integrated chip and the W78E52D single-chip microcomputer of extensive use to constitute.
Single-chip microcomputer sends data to MAX485 by serial ports, after the level signal conversion data is delivered to the RS485 bus, and the D2 tutorial light can glimmer with the variation of data in the process of transmitting; External data enters controller and carries out level translation by MAX485 and enter single-chip microcomputer by serial ports.Because the RS485 bus is the half duplex communication pattern, therefore in SCM program, carry out the communication time-oriented sequential control, this controller carries out the communication time-oriented sequential control according to MODBUS-RTU agreement master slave mode, and controller (main control module) is that main website, display modular (from the control module) are slave station.
This controller has adopted hardware watchdog circuit MAX813, feeding the dog period definition is 1.6S, when the single-chip microcomputer mistake or when failing regularly to export feeding-dog signal according to the programming requirement unusually (twice feed dog at interval greater than 1.6 seconds), MAX813 will export the WDO signal and drive optocoupler, triode, relay, produce the system failure and report to the police.
7) accompanying drawing 7 display modulars (from the control module) electrical block diagram.This part circuit adopts single-chip microcomputer W78E52D, communicating circuit MAX485, switching value to drive formations such as UL2803, display driver MAX7219, LED light (light emitting diode), nixie tube; receive safety protection control device data by communication link RS485; resolve the indication of classifying of information such as rotating speed, the warning of all kinds of emergency shutdown, line fault warning by SCM program communications protocol by appointment, finally reach the purpose of classified inquiry.Buzzer drives output, because controller self signal volume is limited, therefore provides this signal extension to drive high-power buzzer.
8) communication protocol description.Native system data communication agreement has been arranged the data transmission format between safety protection control device (main control module) and the supporting display modular (from the control module), is that bus RS485 data send encapsulation and receive the foundation of resolving.The RS485 communication interface is used for main control module and exchanges data from empty intermodule.
The link communication is the half duplex communication pattern, works out according to the MODBUS-RTU protocol format.Be responsible for data capture, processing by the safety protection control device, and protocol format sends data to display modular by appointment, the safety protection control device is the agreement main website, and display modular is the agreement slave station, tributary address 03H.
The communications parameter configuration
| Title | Describe |
| The communication type | RS485, two-wire system. |
| Baud rate | |
| Start bit | |
| 1 | |
| Data bit | 8 |
| Position of | 1 |
| Check bit | The no parity check position |
The communication instruction function code is described
| Sequence number | Functional description | | Remarks | |
| 1 | Write the maintenance register | 10H | ? |
Illustrate: according to application demand, this agreement only supports to write the maintenance register functions.
Read-only maintenance register district is described
| Sequence number | Register address HEX | Title | Show | Transmit |
| 1 | 0000H | | 0~9999 | 0~9999 |
| 2 | 0001H | Left column indication byte | ? | 0~65535 |
| 3 | 0002H | Right row indication byte | ? | 0~65535 |
Illustrate: all data are unsigned int.
Claims (9)
1. diesel engine safety protection control device, it is characterized in that: comprising: main control module structural circuit, from control modular structure circuit, switching value signal acquisition circuit, emergency shutdown solenoid valve circuit fault monitoring circuit, safety protection control warning circuit, described main control module structural circuit links to each other by the RS485 communication interface and from control modular structure circuit; Described main control module structural circuit first input end links to each other by the sensor of switching value signal acquisition circuit with diesel engine output switching value signal; Described main control module structural circuit second input end links to each other with electromagnetic valve driving circuit of diesel engine by emergency shutdown solenoid valve circuit fault monitoring circuit; Described main control module structural circuit the 3rd input end links to each other with the operating button group by the operational module interface circuit; Described main control module structural circuit four-input terminal links to each other with basic supervisory system disablement signal, diesel engine run signal by signal interface circuit; Described main control module structural circuit output terminal links to each other with the safety protection control warning circuit by output interface circuit.
2. diesel engine safety protection control device according to claim 1 is characterized in that: describedly be made of at least one display modular structure function circuit from control modular structure circuit; Described display modular structure function circuit adopts single-chip microcomputer W78E52D, communication interface MAX485, power drive UL2803, display driver MAX7219, LED light, nixie tube to constitute; Described have by the RS485 communication interface and will receive the data that main control module sends from the control module; communications protocol is resolved by appointment; have rotating speed, emergency shutdown are reported to the police, line fault is reported to the police information by the indication of classifying of LED light, nixie tube, finally reach the purpose of classified inquiry.
3. diesel engine safety protection control device according to claim 1, it is characterized in that: described main control module structural circuit is made up of central processing unit (CPU) circuit, communicating circuit, watchdog circuit, sensor measuring circuit, line fault testing circuit, operational order testing circuit, parameter configuration circuit, and main core devices has single-chip microcomputer W78E52D, watchdog circuit MAX813L, communication interface MAX485, operational amplifier LM124, serial/parallel conversion CD4099, interface to drive UL2803, optocoupler 4N25, power supply LM2596; Main control module is gathered various sensor states signals, line fault signal, operational order, configuration parameter, carry out logical process according to application program, result after the processing drives control relay circuit on the one hand and exports, on the other hand according to the encapsulation of MODBUS-RTU protocol format and by the output of RS485 communication interface.
4. diesel engine safety protection control device according to claim 1, it is characterized in that: described switching value signal acquisition circuit is connected to form by Boolean value output sensor S1 and two comparators, and each comparator is connected to form by LM124 integrated operational amplifier and optocoupler 4N25; And Boolean value output sensor S1 output terminal links to each other with the reverse signal input end of first comparator, and links to each other with the forward signal input end of second comparator.
5. diesel engine safety protection control device according to claim 1; it is characterized in that: described emergency shutdown solenoid valve circuit fault monitoring circuit takes the not driven period of solenoid valve to carry out the line fault detecting; being linked to each other with comparator with bleeder circuit that resistance R 1 constitutes by electromagnetic valve coil V1 constitutes, and comparator is connected to form by LM124 integrated operational amplifier and optocoupler 4N25.
6. diesel engine safety protection control device according to claim 1, it is characterized in that: described main control module structural circuit is encapsulated in the Al-alloy casing, and the interface configuration of main control module structural circuit comprises: 18 of input lead terminals, 13 of output pin terminals, 3 of communication lead terminals, parameter configuration toggle switch, test button, tutorial light; 3 of described main control module communication lead terminals are followed successively by from left to right: RS485 bus GND, RS485 bus B, RS485 bus A; Described main control module parameter configuration toggle switch is followed successively by from left to right: position 1 is selected for diesel engine nominal operation rotating speed, the position 2 be diesel engine overspeed alarming setting value and rated speed value percentage, and the flywheel number of teeth is detected by speed probe under the diesel version situation that makes up the setting different type of machines in 34 of positions; Described main control module tutorial light: green for working power is indicated, redness is the indication of RS485 communication link state.
7. diesel engine safety protection control device according to claim 6 is characterized in that: 18 definition successively from left to right of described main control module input lead terminal: positive source; positive source; power cathode; power cathode; magnetoelectric tachometric transducer; the instruction of remote control emergency shutdown; the other emergency shutdown instruction of machine; reset instruction; basic supervisory system fault state; the diesel engine running state; more control instruction; the instruction of examination lamp; the noise reduction instruction; the detecting of anxious power failure magnet valve 2 line faults; the detecting of anxious power failure magnet valve 1 line fault; the too high sensor of switching value form cooling water temperature; the high sensor of switching value form crankcase pressure; switching value form lubricating oil pressure is crossed low sensor.
8. diesel engine safety protection control device according to claim 6, it is characterized in that: 13 of described main control module output pin terminals are followed successively by from left to right: position 0 is the signal common port; position 1 drives signal for emergency shutdown; position 2 drives signal for buzzer; position 3 is the signal common port; report to the police for controller synthesis in position 4; position 5 is the main control module power failure; lost efficacy for main control module in position 6; position 7 is the line fault integrated alarm; position 8 is the too high warning of cooling water temperature; position 9 is the high warning of crankcase pressure; the low warning crossed for lubricating oil pressure in position 10; position 11 is overspeed alarming; position 12 is the signal common port.
9. a kind of diesel engine safety protection control device according to claim 2, it is characterized in that: described display modular structure adopts the aluminum alloy casing encapsulation, the protection of display floater PVC pad pasting, the functions of modules interface comprises: power supply input lead terminal, communication interface lead terminal, display window; The display window content comprises in the described display modular: the instant rotating speed 0-9999RPM of diesel engine; the overspeed alarming indication; speed probe line fault is reported to the police and is indicated; lubricating oil pressure is crossed the low indication of reporting to the police; lubricating oil pressure is crossed low sensor line fault warning indication; the high indication of reporting to the police of crankcase pressure; the high sensor line fault of crankcase pressure is reported to the police and is indicated; the too high warning indication of cooling water temperature; the too high sensor line malfunction alarm indication of cooling water temperature; safety protection control device resultant fault is reported to the police and is indicated; the indication of emergency shutdown solenoid valve circuit malfunction alarm; basic monitoring/alarm system working power indicating fault; basic monitoring/alarm system failure of removal indication; the indication of remote control emergency shutdown button line fault; the indication of the other emergency shutdown button of machine line fault; more control state indication; the indication of diesel engine running state; the working power indication; the indication of emergency shutdown state.
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|---|---|---|---|
| CN 201220570366 CN203067092U (en) | 2012-11-01 | 2012-11-01 | Diesel engine safety protection controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220570366 CN203067092U (en) | 2012-11-01 | 2012-11-01 | Diesel engine safety protection controller |
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|---|---|
| CN203067092U true CN203067092U (en) | 2013-07-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900526A (en) * | 2012-11-01 | 2013-01-30 | 河南柴油机重工有限责任公司 | Diesel engine security protection control method and diesel engine security protection controller |
| CN104460316A (en) * | 2014-12-26 | 2015-03-25 | 上海科泰电源股份有限公司 | Redundant controller switching devices arranged side by side and used for emergency diesel-electric generator set |
| CN105257408A (en) * | 2015-10-23 | 2016-01-20 | 河南柴油机重工有限责任公司 | Waste landfill gas engine monitoring device and method |
| CN105257414A (en) * | 2015-10-23 | 2016-01-20 | 河南柴油机重工有限责任公司 | Waste landfill gas engine control device and method |
| CN107561440A (en) * | 2017-07-24 | 2018-01-09 | 芜湖赛宝信息产业技术研究院有限公司 | A kind of New energy automobile motor overspeed test bench and test method |
| CN113202843A (en) * | 2021-06-11 | 2021-08-03 | 张向东 | Hydraulic power generation system |
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2012
- 2012-11-01 CN CN 201220570366 patent/CN203067092U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900526A (en) * | 2012-11-01 | 2013-01-30 | 河南柴油机重工有限责任公司 | Diesel engine security protection control method and diesel engine security protection controller |
| CN104460316A (en) * | 2014-12-26 | 2015-03-25 | 上海科泰电源股份有限公司 | Redundant controller switching devices arranged side by side and used for emergency diesel-electric generator set |
| CN104460316B (en) * | 2014-12-26 | 2017-02-22 | 上海科泰电源股份有限公司 | Redundant controller switching devices arranged side by side and used for emergency diesel-electric generator set |
| CN105257408A (en) * | 2015-10-23 | 2016-01-20 | 河南柴油机重工有限责任公司 | Waste landfill gas engine monitoring device and method |
| CN105257414A (en) * | 2015-10-23 | 2016-01-20 | 河南柴油机重工有限责任公司 | Waste landfill gas engine control device and method |
| CN107561440A (en) * | 2017-07-24 | 2018-01-09 | 芜湖赛宝信息产业技术研究院有限公司 | A kind of New energy automobile motor overspeed test bench and test method |
| CN113202843A (en) * | 2021-06-11 | 2021-08-03 | 张向东 | Hydraulic power generation system |
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