CN112374453B - Control device for oil gun oiling function of alarm - Google Patents
Control device for oil gun oiling function of alarm Download PDFInfo
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- CN112374453B CN112374453B CN202011016525.6A CN202011016525A CN112374453B CN 112374453 B CN112374453 B CN 112374453B CN 202011016525 A CN202011016525 A CN 202011016525A CN 112374453 B CN112374453 B CN 112374453B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Business, Economics & Management (AREA)
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- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The application relates to a control device for an alarm oil gun oiling function, which is provided with an oil gun signal acquisition unit, a main control unit and a signal control unit; the oil gun signal acquisition unit monitors the state of the oil gun in real time and sends the obtained oil gun state signal to the main board and the main control unit of the oil gun; the signal control unit is arranged in a fuel gun state signal transmission channel between the fuel gun signal acquisition unit and the main board of the fuel dispenser; the main control unit receives the signal sent by the monitoring system and the real-time oil gun state signal sent by the oil gun signal acquisition unit, and controls the oil gun state signal transmission channel according to the received alarm signal sent by the monitoring system and the real-time oil gun state signal sent by the oil gun signal acquisition unit, so that the work of the oil pump of the oil feeder is controlled, the interference is eliminated, the reliability is improved, and the requirements are met.
Description
Technical Field
The application relates to the technical field of oil gas recovery monitoring of gas stations, in particular to a control device capable of controlling an oiling machine to refuel again after an oil gun alarms.
Background
The secondary recovered oil gas related in the oil gas recovery technology of the gas station refers to volatile organic matters generated when the oiling machine is used for oiling the automobile oil tank through the oiling gun. In order to further strengthen the environment management of the oil gas of the gas station, a secondary oil gas recovery monitoring system (monitoring system for short) of the gas station is provided with a gas-liquid ratio early warning and alarming function: the monitoring system is required to monitor the effective gas-liquid ratio of any oiling gun (the number of times of continuous oiling amount is recorded as one time when 15L is larger than 15L) is smaller than 0.9 or larger than 1.3 in 24h (natural days) and exceeds 25% of the total oiling times of the gun, the monitoring system gives an early warning to the oiling gun, the oiling function of the oiling gun is required to be stopped when the monitoring system gives an alarm in an early warning state for 7 continuous days, and the oiling function cannot be stopped in the oiling process.
The current monitoring system alarms the oiling gun and meets the requirement of stopping oiling by controlling the electromagnetic valve. The electromagnetic valve is positioned on an oil path between the oil gun and the oil pump and is used for controlling the opening and closing of the oil path. The monitoring system judges whether one refueling is finished or not by simultaneously generating and disappearing the electromagnetic valve signal. When the oil gun gives an alarm in a non-oiling state, the monitoring system sends an alarm signal to the electromagnetic valve, and the electromagnetic valve is controlled to stop working and close the oil path. After the oil gun alarm is executed, when the oil gun is lifted again (a signal generated by lifting or hanging the oil gun is hereinafter referred to as a gun lifting signal or a gun hanging signal), the gun lifting signal is normally sent to the oil gun main board, and the oil gun main board controls equipment such as an oil pump and the like to normally work, so that an oil way between the oil pump and the electromagnetic valve of the oil gun is kept in an oil state. Because the alarm is not released, the electromagnetic valve is always in a closed state, so that an oil way between the electromagnetic valve and the oil gun is in an oil-free state, and the oil gun cannot refuel at the moment, and the function of stopping the gun in time after the oil gun alarms is realized.
When the oiling gun gives an alarm in the oiling process, the monitoring system executes the alarm after the oiling is completed according to the requirement. However, if the fuel gun is not hung back and fuel is suspended at the moment, the electromagnetic valve signal is interrupted and an error signal of ending the pseudo fuel is generated; at the moment, the monitoring system immediately controls the electromagnetic valve to stop working and closes the oil way when the oil filling is finished according to the error signal; when the oil gun continues to refuel, the oil gun cannot refuel due to the fact that an oil way is closed, so that the monitoring system cannot meet the requirement that the gun cannot be stopped in the refueling process after the oil gun alarms.
Disclosure of Invention
Aiming at the problem that the existing oil gun oiling function is easy to be misoperation, the application provides a control device for the oil gun oiling function.
In order to achieve the above purpose, the application discloses a control device for the oil filling function of an alarm oil gun, which is characterized in that: the device comprises an oil gun signal acquisition unit, a main control unit, a signal control unit and a power supply unit; the main control unit is composed of a microprocessor and a data processing circuit composed of peripheral elements; the power supply unit provides a working direct current working power supply Vcc for the oil gun signal acquisition unit, the main control unit and the signal control unit; the oil gun signal acquisition unit monitors the state of the oil gun in real time and sends the obtained oil gun state signal to the main board and the main control unit of the oil gun; the signal control unit is arranged in a fuel gun state signal transmission channel between the fuel gun signal acquisition unit and the main board of the fuel dispenser; the main control unit receives signals sent by the monitoring system and real-time oil gun state signals sent by the oil gun signal acquisition unit, and the main control unit controls the oil gun state signals according to the signals sent by the monitoring system and the real-time oil gun state signals sent by the oil gun signal acquisition unit in the following mode:
(1) When the main control unit receives a normal signal, the main control unit controls the signal control unit to continuously open the state signal transmission channel of the oiling gun;
(2) When the main control unit receives the alarm signal for the first time and the oil gun is in a gun hanging state, the main control unit controls the signal control unit to seal the oil gun state signal transmission channel and keep the sealing, and the main control unit receives signals sent by the monitoring system in real time;
(3) When the main control unit receives the alarm signal for the first time and the oil gun is in a gun lifting state, the main control unit controls the signal control unit to keep opening the oil gun state signal transmission channel, and the main control unit receives the real-time oil gun state signal sent by the oil gun signal acquisition unit in real time;
(4) When the main control unit receives that the oil gun is in a gun hanging state, the main control unit controls the signal control unit to seal the oil gun state signal transmission channel and keep the sealing state, and the main control unit receives signals sent by the monitoring system in real time;
(5) When the main control unit receives the normal signal again, the main control unit controls the signal control unit to open the state signal transmission channel of the oiling gun.
Compared with the prior art, the control device for the oil gun oiling function is provided with the oil gun signal acquisition unit, the main control unit and the signal control unit; the oil gun signal acquisition unit monitors the state of the oil gun in real time and sends the obtained oil gun state signal to the main board and the main control unit of the oil gun; the signal control unit is arranged in a fuel gun state signal transmission channel between the fuel gun signal acquisition unit and the main board of the fuel dispenser; the main control unit receives the signal sent by the monitoring system and the real-time oil gun state signal sent by the oil gun signal acquisition unit, and controls the oil gun state signal transmission channel according to the received alarm signal sent by the monitoring system and the real-time oil gun state signal sent by the oil gun signal acquisition unit, so that the work of the oil pump of the oil feeder is controlled, the interference is eliminated, the reliability is improved, and the related requirements are met.
The oil gun signal acquisition unit comprises a signal acquisition unit and a signal conversion unit; the signal acquisition unit is provided with an input end connected with the signal output end of the oiling gun to acquire the state signal of the oiling gun in real time and divide the state signal of the oiling gun into two paths: one path of signal is connected with the oiling machine main board through the signal control unit to provide the oiling machine main board with oiling gun state signals of the same type as the acquired signal in real time, and the other path of signal is input to the signal conversion unit; the output end of the signal conversion unit is connected with the main control unit, and converts the state signal of the oil gun into a standard signal and inputs the standard signal to the main control unit; the oil gun signal acquisition circuit is also provided with a pair of signal input ends which are used for being connected with the oil gun state signal output ends and a pair of oil gun state signal output ends which are connected with an external oil gun main board.
The application is further provided with the signal acquisition unit which is composed of a level signal acquisition circuit; the signal conversion unit is composed of a level conversion circuit; the signal control unit comprises a conversion relay K2 and a relay control circuit, the relay control circuit is controlled by the main control unit, a signal negative electrode input end in a pair of signal input ends is connected with a signal negative electrode output end in a pair of fuel gun state signal output ends, a normally closed contact of the conversion relay K2 is simultaneously connected in series with a signal positive electrode input end in the pair of signal input ends, a signal positive electrode output end in the pair of fuel gun state signal output ends and an input end of the signal acquisition unit form a path for transmitting the state signals of the fuel guns of the same type, and an output end of the signal acquisition unit forms another path for transmitting the state signals of the fuel guns and is connected with an input end of the signal conversion unit.
The signal acquisition unit comprises a second switching triode Q2, a first base current limiting resistor R3 and a second load resistor R4, wherein the collector of the second switching triode Q2 is connected with the positive electrode of a direct current working power supply Vcc through the second load resistor R4, the collector of the second switching triode Q2 is used as the output end of the signal acquisition unit to be connected with the input end of the signal conversion unit, the emitter of the second switching triode Q2 is connected with the input end of a signal negative electrode and the negative electrode of the direct current working power supply Vcc, and the base is connected with one end of a normally closed contact of the conversion relay K2 through the first base current limiting resistor R3 as the input end; the signal control unit comprises a conversion relay K2, a third switching triode Q3 and a second base electrode current limiting resistor R5, wherein two ends of a coil of the conversion relay K2 are respectively connected with the positive electrode of a direct current working power supply Vcc and the collector electrode of the third switching triode Q3, the emitter electrode of the third switching triode Q3 is connected with the negative electrode of the direct current working power supply Vcc, and the base electrode of the third switching triode Q3 is connected with the alarm signal output end of the main control unit through the second base electrode current limiting resistor R5 to form the relay control circuit;
the signal conversion unit comprises an upper bias resistor R1, a first load resistor R2 and a first switching triode Q1, wherein the collector of the first switching triode Q1 is connected with the positive electrode of a direct current working power supply Vcc through the first load resistor R2, the emitter of the first switching triode Q1 is connected with the negative electrode of the direct current working power supply Vcc, the base of the first switching triode Q1 is connected with the output end of the signal acquisition unit through the upper bias resistor R1, and the collector of the first switching triode Q1 forms the output end of the signal conversion unit and is connected with the main control unit.
As a further arrangement of the application, the signal acquisition unit circuit comprises an acquisition relay K1; one signal input end point of the pair of signal input ends is connected with the positive electrode of the direct current working power supply Vcc, one end of the acquisition relay K1 coil is connected with the negative electrode of the direct current working power supply Vcc, the other end of the acquisition relay K1 coil is connected with the other signal input end point of the pair of signal input ends, the other end of the acquisition relay K1 coil is simultaneously the output end of the signal acquisition unit to form the other path of the oil gun state signal transmission, the other path of the oil gun state signal transmission is connected with the input end of the signal conversion unit, and one end of two ends of the normally open contact of the acquisition relay K1 is connected with one end point of the pair of oil gun state signal output ends.
The application further provides that the signal control unit comprises a conversion relay K2, a third switching triode Q3 and a second base current limiting resistor R5, two ends of a coil of the conversion relay K2 are respectively connected with the positive electrode of a direct current working power supply Vcc and the collector electrode of the third switching triode Q3, the emitter electrode of the third switching triode Q3 is connected with the negative electrode of the direct current working power supply Vcc, the base electrode of the third switching triode Q3 is connected with the alarm signal output end of the main control unit through the second base current limiting resistor R5 to form a relay control circuit, and a normally closed contact of the conversion relay K2 is connected in series between the other end of a normally open contact of the acquisition relay K1 and the other end point of the pair of oiling gun state signal output ends to form a path for transmitting the state signals of the oiling gun of the same type.
The signal conversion unit further comprises an upper bias resistor R1, a first load resistor R2 and a first switching triode Q1, wherein the collector of the first switching triode Q1 is connected with the positive electrode of the direct current working power supply Vcc through the first load resistor R2, the emitter of the first switching triode Q1 is connected with the negative electrode of the direct current working power supply Vcc, the base of the first switching triode is connected with the other signal input end point of the pair of signal input ends through the upper bias resistor R1, the collector of the first switching triode forms the output end of the signal conversion unit, the output end of the signal acquisition unit is connected, and the collector of the first switching triode Q1 forms the output end of the signal conversion unit and is connected with the main control unit.
The main control unit is further provided with a communication unit, and the main control unit processes the input converted state signal of the oiling gun and then inputs the processed state signal of the oiling gun into the communication unit, and the state information of the oiling gun is transmitted to the monitoring system through the communication unit.
As a further arrangement of the application, the communication unit is formed by a 485 communication chip and its peripheral components.
The application is further described below with reference to the accompanying drawings and specific examples.
Drawings
FIG. 1 is a schematic circuit diagram of an embodiment 1 of the present application;
FIG. 2 is a schematic circuit diagram of embodiment 2 of the present application;
FIG. 3 is a schematic circuit diagram of a communication unit according to an embodiment of the present application;
FIG. 4 is a schematic circuit diagram of an embodiment of a power supply unit according to the present application;
FIG. 5 is a block diagram of an embodiment of the present application;
FIG. 6 is a block diagram of a control flow for not sending an alarm signal according to an embodiment of the present application;
FIG. 7 is a block diagram of a control flow in an alarm state according to an embodiment of the present application;
FIG. 8 is a block diagram of a control flow after an alarm signal is sent out in an embodiment of the present application.
Detailed Description
As shown in FIG. 5, the control device for the oil gun oiling function comprises an oil gun signal acquisition unit, a main control unit, a signal control unit and a power supply unit; the main control unit is composed of a microprocessor and a data processing circuit composed of peripheral elements; the power supply unit provides a working direct current working power supply Vcc for the oil gun signal acquisition unit, the main control unit and the signal control unit; the oil gun signal acquisition unit monitors the state of the oil gun in real time and sends the obtained oil gun state signal to the main board and the main control unit of the oil gun; the signal control unit is arranged in a fuel gun state signal transmission channel between the fuel gun signal acquisition unit and the main board of the fuel dispenser; the oiling machine main board controls the working state of the oiling machine oil pump according to the oiling gun state signal received by the signal control unit; the monitoring system monitors the effective gas-liquid ratio of the oil gun in real time and sends an alarm signal or a normal signal to the main control unit according to whether the effective gas-liquid ratio exceeds a preset range; the main control unit receives the signal sent by the monitoring system and the real-time oil gun state signal sent by the oil gun signal acquisition unit, and the main control unit controls the oil gun state signal according to the signal sent by the monitoring system and the real-time oil gun state signal sent by the oil gun signal acquisition unit in the following mode:
(1) When the main control unit receives a normal signal, the main control unit controls the signal control unit to continuously open the state signal transmission channel of the oiling gun;
(2) When the main control unit receives the alarm signal for the first time and the oil gun is in a gun hanging state, the main control unit controls the signal control unit to seal the oil gun state signal transmission channel and keep the sealing, and the main control unit receives signals sent by the monitoring system in real time;
(3) When the main control unit receives the alarm signal for the first time and the oil gun is in a gun lifting state, the main control unit controls the signal control unit to keep opening the oil gun state signal transmission channel, and the main control unit receives the real-time oil gun state signal sent by the oil gun signal acquisition unit in real time;
(4) When the main control unit receives that the oil gun is in a gun hanging state, the main control unit controls the signal control unit to seal the oil gun state signal transmission channel and keep the sealing state, and the main control unit receives signals sent by the monitoring system in real time;
(5) When the main control unit receives the normal signal again, the main control unit controls the signal control unit to open the state signal transmission channel of the oiling gun.
The oil gun signal acquisition unit comprises a signal acquisition unit and a signal conversion unit. The signal acquisition unit is provided with an input end connected with the signal output end of the oiling gun to acquire the state signal of the oiling gun in real time and divide the state signal of the oiling gun into two paths: one path of signal is connected with the oiling machine main board through the signal control unit to provide the oiling machine main board with oiling gun state signals (i.e. unprocessed original level signals or processed switch signals of the same type) of the same type as the acquired signals in real time, the oiling machine main board controls the oiling machine oil pump to work according to the oiling gun state signals, meanwhile, the other path of signal is input into the signal conversion unit, the oiling gun state signals are converted into standard signals to be input into the main control unit, interference is eliminated, so that more accurate oiling gun states are acquired, and the oiling gun state signals are sent to the monitoring system; the fuel dispenser status signal may be a pulse signal, a level signal, or a switch contact signal.
The output end of the signal conversion unit is connected with the main control unit, and converts the state signal of the oiling gun into a standard signal (digital level signal or switching value signal) and inputs the standard signal into the main control unit; the main control unit processes the input converted state signal of the oiling gun, and then inputs the processed state signal of the oiling gun into the communication unit, and the oiling machine information is transmitted to an external monitoring system through the communication unit; the oil gun signal acquisition unit is also provided with a pair of signal input ends which are used for being connected with the oil gun state signal output ends and a pair of oil gun state signal output ends which are connected with an external oil gun main board.
In order that those skilled in the art will better understand the present application, a detailed description of the preferred embodiments of the present application and the accompanying drawings will be provided below, wherein it is apparent that the described embodiments are only some, but not all, embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
Example 1
As shown in fig. 1, in this embodiment, the control device for the oil gun fueling function includes an oil gun signal acquisition unit, a main control unit, a signal control unit and a power supply unit; the main control unit is composed of a microprocessor and a data processing circuit composed of peripheral elements; the power supply unit provides a working direct current working power supply Vcc for the oil gun signal acquisition unit, the main control unit and the signal control unit; the oil gun signal acquisition unit comprises a signal acquisition unit and a signal conversion unit, wherein the signal acquisition unit is composed of a level signal acquisition circuit, and the signal conversion unit is composed of a level conversion circuit.
In this embodiment, the signal control unit includes a conversion relay K2 and a relay control circuit, where the relay control circuit is controlled by the main control unit, a signal negative electrode input end of the pair of signal input ends is connected with a signal negative electrode output end of the pair of fuel gun state signal output ends, a normally closed contact of the conversion relay K2 is simultaneously connected in series with a signal positive electrode input end of the pair of signal input ends and a signal positive electrode output end of the pair of fuel gun state signal output ends, and forms a path of the same type of fuel gun state signal transmission with an input end of the signal acquisition unit, and an output end of the signal acquisition unit forms another path of the fuel gun state signal transmission and is connected with an input end of the signal conversion unit.
Specifically, the signal control unit comprises a relay control circuit composed of a conversion relay K2, a second freewheeling diode D2, a third switching triode Q3 and a second base current limiting resistor R5, wherein two ends of a coil of the conversion relay K2 are respectively connected with the positive pole of a direct current working power supply Vcc and the collector of the third switching triode Q3, the second freewheeling diode D2 is connected in parallel with two ends of the coil of the conversion relay K2, the emitter of the third switching triode Q3 is connected with the negative pole of the direct current working power supply Vcc, and the base of the third switching triode Q3 is connected with the alarm signal output end of the main control unit through the second base current limiting resistor R5; the signal negative electrode input end of the pair of signal input ends is connected with the signal negative electrode output end of the pair of fuel gun state signal output ends;
the signal acquisition unit comprises a second switching triode Q2, a first base electrode current limiting resistor R3 and a second load resistor R4, wherein the collector electrode of the second switching triode Q2 is connected with the positive electrode of a direct current working power supply Vcc through the second load resistor R4, meanwhile, the collector electrode of the second switching triode Q2 is used as the output end of the signal acquisition unit to be connected with the input end of the signal conversion unit, the emitter electrode of the second switching triode Q2 is connected with the input end of a signal negative electrode and the negative electrode of a direct current working power supply Vcc, and the base electrode is connected with one end of a normally closed contact of the conversion relay K2 through the first base electrode current limiting resistor R3 as the input end;
the signal conversion unit is composed of a level conversion circuit, namely, low-level signals lower than a certain range are converted into uniform low-level signals, and high-level signals within a certain range are converted into uniform high-level signals. In this embodiment, the signal conversion unit includes an upper bias resistor R1, a first load resistor R2, a filter capacitor C5, and a first switching triode Q1, where the collector of the first switching triode Q1 is connected to the positive electrode of the dc working power supply Vcc through the first load resistor R2, the emitter is connected to the negative electrode of the dc working power supply Vcc, one path of the base is connected to the collector of the second switching triode Q2 (i.e., the output end of the signal acquisition unit) through the upper bias resistor R1, and is connected to the positive electrode of the dc working power supply Vcc through the second load resistor R4 to form a level conversion circuit with the switching triode as a core (of course, the collector of the first switching triode Q1 may also be a PNP), and in order to improve the anti-interference capability, it is preferable that the base of the first switching triode Q1 is provided with another path connected to the negative electrode of the dc working power supply Vcc through the filter capacitor C5. The collector electrode of the first switching triode Q1 forms the output end of the signal conversion unit and is connected with the main control unit.
In order to more reliably transmit the fuel dispenser information to an external monitoring system, the main control unit is preferably further provided with a communication unit, the main control unit processes the input converted fuel dispenser state signal and then inputs the processed fuel dispenser state signal to the communication unit, and the fuel dispenser state information is transmitted to the monitoring system through the communication unit. The communication unit is composed of an application specific communication integrated chip and its peripheral components, as shown in fig. 3, and a 485 communication chip can be selected in this embodiment to obtain more reliable transmission characteristics.
The control device for the oiling function of the warning oil gun is applicable to oiling machines in a pulse signal and level signal mode, and the oiling machine in a level signal mode can provide a level signal in a low level state when the oiling gun is in a gun lifting state; the oiling machine main board receives a low-level signal, starts oiling machine equipment and prepares for oiling work; when the monitoring system acquires a low-level signal, judging that the oil gun is in a gun lifting state, namely starting oil filling once; when the oil gun is in a gun hanging state, a level signal in a high level state is provided; the main board of the oiling machine receives a high-level signal, and closes the oiling machine equipment to stop oiling work; and the monitoring system acquires a high-level signal and judges that the oil gun is in a gun hanging state, namely, one-time oil filling is finished.
The specific working principle of the oil gun signal acquisition unit in the specific implementation is as follows:
when the gun is lifted, the pair of signal input ends (the joint J4) inputs a low-level signal, one path of the input low-level signal is directly transmitted to the pair of gun state signal output ends (the joint J6), namely the gun state signals of the same type are directly added to the main board of the oil engine to output, namely a low-level signal is output, and the main board of the oil engine starts the oil engine equipment to prepare for oiling; meanwhile, the other path of the input low-level signal is transmitted to the base of the second switching triode Q2 through the first base current limiting resistor R3, and the second switching triode Q2 is cut off at the moment by utilizing the characteristic of an NPN triode, and the collector electrode is at a high level. The high level of the collector electrode of the second switching triode Q2 is transmitted to the base electrode pin of the first switching triode Q1 through the upper bias resistor R1, at the moment, the first switching triode Q1 is conducted, the input port S_OG of the main control unit is pulled down to be a low level signal from the original high level, the main control unit judges that oiling starts, and related information is sent to the monitoring system through the data transmission interface J8 by the communication unit, so that the monitoring system stably acquires gun lifting signals of the oiling gun, and judges that oiling starts once.
When the oiling gun is hung back, the pair of signal input ends (the connector J4) inputs high-level signals, one path of the input high-level signals is directly transmitted to the pair of oiling gun state signal output ends to be connected (the connector J6), namely the oiling gun state signals of the same type are directly added to the main board of the oiling machine to output, namely a high-level signal is output, the main board of the oiling machine closes the oiling machine equipment, and the oiling work is stopped; meanwhile, the other path of the input high-level signal is transmitted to the base of the second switching triode Q2 through the first base current limiting resistor R3, at the moment, the second switching triode Q2 is conducted, and the collector electrode is low-level. The low level of the collector electrode of the second switching triode Q2 is transmitted to the base electrode pin of the first switching triode Q1 through the upper bias resistor R1, at the moment, the first switching triode Q1 is cut off, the input port S_OG of the main control unit is pulled to a high level signal from the original low level, the main control unit judges that the oiling is finished, and related information is sent to the monitoring system through the data transmission interface J8 by the communication unit, so that the monitoring system stably acquires a gun hanging signal of the oiling gun, and judges that one-time oiling is finished.
Example 2
As shown in fig. 2, in this embodiment, the control device for the oil gun fueling function includes an oil gun signal acquisition unit, a main control unit, a signal control unit and a power supply unit; the main control unit is composed of a microprocessor and a data processing circuit composed of peripheral elements; the power supply unit provides a working direct current working power supply Vcc for the oil gun signal acquisition unit, the main control unit and the signal control unit; the oil gun signal acquisition unit comprises a signal acquisition unit and a signal conversion unit.
In this embodiment, the signal acquisition unit circuit includes an acquisition relay K1 and a first freewheeling diode D1; one signal input end point of the pair of signal input ends is connected with the positive electrode of a direct current working power supply Vcc, one end of a coil of the acquisition relay K1 is connected with the negative electrode of the direct current working power supply Vcc, the other end of the coil of the acquisition relay K1 is connected with the other signal input end point of the pair of signal input ends, the other end of the coil of the acquisition relay K1 is simultaneously connected with the input end of the signal conversion unit for forming the other path of the signal transmission of the state of the oiling gun for the output end of the signal acquisition unit, the first freewheeling diode D1 is connected in parallel with the two ends of the coil of the acquisition relay K1, and one end of the two ends of a normally open contact of the acquisition relay K1 is connected with one end point of the state signal output ends of the pair of the oiling gun;
the signal control unit comprises a relay control circuit formed by a conversion relay K2, a second freewheeling diode D2, a third switching triode Q3 and a second base current limiting resistor R5, wherein two ends of a coil of the conversion relay K2 are respectively connected with the positive pole of a direct-current working power supply Vcc and the collector of the third switching triode Q3, the second freewheeling diode D2 is connected in parallel with two ends of the coil of the conversion relay K2, the emitter of the third switching triode Q3 is connected with the negative pole of the direct-current working power supply Vcc, the base of the third switching triode Q3 is connected with the alarm signal output end of the main control unit through the second base current limiting resistor R5 to form the relay control circuit, and a normally closed contact of the conversion relay K2 is connected in series between the other end point of the pair of oiling gun state signal output ends and the other end point of the pair of oiling gun state signal output ends to form one path of the same type oiling gun state signal transmission;
the signal conversion unit is composed of a level conversion circuit, namely, low-level signals lower than a certain range are converted into uniform low-level signals, and high-level signals within a certain range are converted into uniform high-level signals. In this embodiment, the signal conversion unit includes an upper bias resistor R1, a first load resistor R2, a filter capacitor C5, and a first switching triode Q1, where the first switching triode Q1 is NPN type, a collector of the first switching triode Q1 is connected to an anode of the direct current working power supply Vcc through the first load resistor R2, an emitter of the first switching triode Q1 is connected to a cathode of the direct current working power supply Vcc, a base of the first switching triode is connected to another signal input end point of the pair of signal input ends through the upper bias resistor R1, a collector of the first switching triode forms an output end of the signal conversion unit, an output end of the signal acquisition unit is connected, and an output end of the signal conversion unit is connected to the master control unit.
In order to more reliably transmit the fuel dispenser information to an external monitoring system, the main control unit is preferably further provided with a communication unit, the main control unit processes the input converted fuel dispenser state signal and then inputs the processed fuel dispenser state signal to the communication unit, and the fuel dispenser state information is transmitted to the monitoring system through the communication unit. The communication unit is composed of an application specific communication integrated chip and its peripheral components, as shown in fig. 3, and a 485 communication chip can be selected in this embodiment to obtain more reliable transmission characteristics.
The control device for the oil gun oiling function is applicable to oiling machines in a solenoid valve signal mode, and in a normal condition, when the oiling gun is in a gun lifting state, the solenoid valve can provide a switch signal in a closed state; the oiling machine main board receives a closing switch signal, starts oiling machine equipment and prepares for oiling work; the monitoring system acquires a low-level signal and judges that the oil gun is in a gun lifting state, namely, one-time oil filling is started;
when the oil gun is in a gun hanging state, the electromagnetic valve can provide a switch signal in an off state; the main board of the oiling machine receives an off switch signal, and closes the oiling machine equipment to stop oiling work; when the monitoring system acquires the high-level signal, the oil gun is judged to be in a gun hanging state, namely, one-time oil filling is finished.
The specific working principle of the oil gun signal acquisition unit of the specific embodiment is as follows:
when the oil gun is lifted, a switch signal in a closed state is received between a pair of signal input ends (pins 1 and 2 of a connector J2), namely the pin 1 of the J2 is in a power VCC high level, a control coil between the pins 1 and 2 of the acquisition relay K1 is electrified, so that a switch between normally open contacts 3 and 5 of the acquisition relay K1 is changed from a normally open state to a normally closed state, a pair of oil gun state signal output ends (connector J3) are connected and controlled by states of normally open contacts 3 and 5 of the acquisition relay K1, a pair of oil gun state signal output ends (connector J3) output a switch signal in the closed state to the oil gun main board, namely the processed switch signal in the same type of closed state, and the oil gun main board starts oil gun equipment to prepare for oil filling;
meanwhile, a high-level signal on a No. 1 pin in the pair of signal input ends (No. 1 pin and No. 2 pin of the connector J2) is transmitted to a base pin of the first switching triode Q1 through the upper bias resistor R1, the first switching triode Q1 is conducted at the moment, an input port S_OG of the main control unit is pulled down from an original high level to a low level signal, the main control unit judges that oiling starts, and related information is transmitted to the monitoring system through the data transmission interface J8 by the communication unit, so that the monitoring system can stably acquire gun lifting signals of the oiling gun, and the starting of one-time oiling is judged.
When the oil gun is hung back, a switch signal in an open state is received between a pair of signal input ends (pins 1 and 2 of a connector J2), namely the pin 1 of the J2 is disconnected with a power supply VCC, a control coil between the pins 1 and 2 of the acquisition relay K1 is powered off, so that a switch between normally open contacts 3 and 5 of the acquisition relay K1 is changed from closed to open, a pair of oil gun state signal output ends (connector J3) are connected and controlled by states of normally open contacts 3 and 5 of the acquisition relay K1, a pair of oil gun state signal output ends (connector J3) output a switch signal in an open state to output signals of the same type of oil gun to an oil gun main board, namely the processed switch signal in the same type of open state, and the oil gun main board closes oil gun equipment to stop oiling work; meanwhile, because the signal input ends (pins 1 and 2 of the connector J2) are low-level signals, the signals are transmitted to the base pin of the first switching triode Q1 through the upper bias resistor R1, the first switching triode Q1 is cut off, the input port S_OG of the main control unit is pulled up to be high-low-level signals from the original low level, the main control unit judges that the oiling is finished, and related information is transmitted to the monitoring system through the data transmission interface J8, so that the monitoring system can stably acquire a gun hanging signal of the oiling gun, and the oiling is judged to be finished once.
The working principle of the control device for the oil gun oiling function of the alarm oil gun is as follows:
the monitoring system monitors whether the effective gas-liquid ratio of the oil gun (the number of times of which the continuous oil filling amount is more than 15L is recorded as one time) is less than 0.9 or more than 1.3 exceeds 25 percent of the total number of times of oil filling of the gun in real time, and if the effective gas-liquid ratio of the oil gun does not exceed 25 percent of the total number of times of oil filling of the gun, the monitoring system normally signals or releases alarm signals to the main control unit; if the continuous 7 days exceed 25% of the total number of times of oiling the gun, the monitoring system sends an alarm signal of the oiling gun to the main control unit, the oiling function of the oiling gun is stopped when the alarm is given, and the oiling function cannot be stopped in the oiling process.
The specific control flow is shown in fig. 6-8.
The above examples are given for clarity of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the application.
Claims (10)
1. The utility model provides a control device of warning oil gun function of refueling which characterized in that: the device comprises an oil gun signal acquisition unit, a main control unit, a signal control unit and a power supply unit; the main control unit is composed of a microprocessor and a data processing circuit composed of peripheral elements; the power supply unit provides working direct current working power supply for the oil gun signal acquisition unit, the main control unit and the signal control unit; the oil gun signal acquisition unit monitors the state of the oil gun in real time and sends the obtained oil gun state signal to the main board and the main control unit of the oil gun; the signal control unit is arranged in a fuel gun state signal transmission channel between the fuel gun signal acquisition unit and the main board of the fuel dispenser; the main control unit receives signals sent by the monitoring system and real-time oil gun state signals sent by the oil gun signal acquisition unit, and the main control unit controls the oil gun state signals according to the signals sent by the monitoring system and the real-time oil gun state signals sent by the oil gun signal acquisition unit in the following mode:
(1) When the main control unit receives a normal signal, the main control unit controls the signal control unit to continuously open the state signal transmission channel of the oiling gun;
(2) When the main control unit receives the alarm signal for the first time and the oil gun is in a gun hanging state, the main control unit controls the signal control unit to seal the oil gun state signal transmission channel and keep the sealing, and the main control unit receives signals sent by the monitoring system in real time;
(3) When the main control unit receives the alarm signal for the first time and the oil gun is in a gun lifting state, the main control unit controls the signal control unit to keep opening the oil gun state signal transmission channel, and the main control unit receives the real-time oil gun state signal sent by the oil gun signal acquisition unit in real time;
(4) When the main control unit receives that the oil gun is in a gun hanging state, the main control unit controls the signal control unit to seal the oil gun state signal transmission channel and keep the sealing state, and the main control unit receives signals sent by the monitoring system in real time;
(5) When the main control unit receives the normal signal again, the main control unit controls the signal control unit to open the state signal transmission channel of the oiling gun.
2. The control device for the fueling function of the warning oil gun according to claim 1, wherein: the oil gun signal acquisition unit comprises a signal acquisition unit and a signal conversion unit; the signal acquisition unit is provided with an input end connected with the signal output end of the oiling gun to acquire the state signal of the oiling gun in real time and divide the state signal of the oiling gun into two paths: one path of signal is connected with the oiling machine main board through the signal control unit to provide the oiling machine main board with oiling gun state signals of the same type as the acquired signal in real time, and the other path of signal is input to the signal conversion unit; the output end of the signal conversion unit is connected with the main control unit, and converts the state signal of the oil gun into a standard signal and inputs the standard signal to the main control unit; the oil gun signal acquisition circuit is also provided with a pair of signal input ends which are used for being connected with the oil gun state signal output ends and a pair of oil gun state signal output ends which are connected with an external oil gun main board.
3. The control device for the fueling function of the warning oil gun according to claim 2, characterized in that: the signal acquisition unit is composed of a level signal acquisition circuit; the signal conversion unit is composed of a level conversion circuit; the signal control unit comprises a conversion relay and a relay control circuit, the relay control circuit is controlled by the main control unit, a signal negative electrode input end in a pair of signal input ends is connected with a signal negative electrode output end in a pair of fuel gun state signal output ends, a normally closed contact of the conversion relay is simultaneously connected in series with a signal positive electrode input end in the pair of signal input ends, a signal positive electrode output end in the pair of fuel gun state signal output ends and an input end of the signal acquisition unit, one path of the same type of fuel gun state signal transmission is formed, and an output end of the signal acquisition unit forms the other path of output of the fuel gun state signal transmission and is connected with an input end of the signal conversion unit.
4. A control device for an alarm gun fueling function as set forth in claim 3 wherein: the signal acquisition unit comprises a second switching triode, a first base electrode current limiting resistor and a second load resistor, wherein a collector electrode of the second switching triode is connected with an anode of a direct current working power supply through the second load resistor, a collector electrode of the second switching triode is used as an output end of the signal acquisition unit to be connected with an input end of the signal conversion unit, an emitter electrode of the second switching triode is connected with a signal negative electrode input end and a negative electrode of the direct current working power supply, and a base electrode is connected with one end of a normally-closed contact of the conversion relay through the first base electrode current limiting resistor as an input end; the signal control unit comprises a conversion relay, a third switching triode and a second base electrode current limiting resistor, two ends of the conversion relay coil are respectively connected with the positive electrode of the direct current working power supply and the collector electrode of the third switching triode, the emitting electrode of the third switching triode is connected with the negative electrode of the direct current working power supply, and the base electrode of the third switching triode passes through the second base electrode current limiting resistor and is connected with the alarm signal output end of the main control unit to form the relay control circuit.
5. A control device for an alarm gun fueling function as set forth in claim 3 wherein: the signal conversion unit comprises an upper bias resistor, a first load resistor and a first switching triode, wherein the collector of the first switching triode is connected with the positive electrode of the direct current working power supply through the first load resistor, the emitter of the first switching triode is connected with the negative electrode of the direct current working power supply, the base of the first switching triode is connected with the output end of the signal acquisition unit through the upper bias resistor, and the collector of the first switching triode forms the output end of the signal conversion unit and is connected with the main control unit.
6. The control device for the fueling function of the warning oil gun according to claim 2, characterized in that: the signal acquisition unit circuit comprises an acquisition relay; one signal input end point of the pair of signal input ends is connected with the positive electrode of the direct current working power supply, one end of the acquisition relay coil is connected with the negative electrode of the direct current working power supply, the other end of the acquisition relay coil is connected with the other signal input end point of the pair of signal input ends, the other end of the acquisition relay coil is simultaneously connected with the input end of the signal conversion unit for forming the other path of the oil gun state signal transmission for the output end of the signal acquisition unit, and one end of the two ends of the normally open contact of the acquisition relay is connected with one end point of the pair of oil gun state signal output ends.
7. The control device for the fueling function of the warning oil gun of claim 6 wherein: the signal control unit comprises a conversion relay and a second base current limiting resistor R5, two ends of a coil of the conversion relay are respectively connected with a positive electrode of a direct current working power supply and a collector electrode of a third switching triode, an emitter electrode of the third switching triode is connected with a negative electrode of the direct current working power supply, a base electrode of the third switching triode passes through the second base current limiting resistor and is connected with an alarm signal output end of the main control unit to form a relay control circuit, and a normally closed contact of the conversion relay is connected in series with the other end of a normally open contact of the acquisition relay and the other end of a pair of oil gun state signal output ends to form one path of state signal transmission of the same type of oil gun.
8. The control device for the fueling function of the warning oil gun of claim 6 wherein: the signal conversion unit comprises an upper bias resistor, a first load resistor and a first switching triode, wherein the collector of the first switching triode is connected with the positive electrode of a direct current working power supply through the first load resistor, the emitter of the first switching triode is connected with the negative electrode of the direct current working power supply, the base of the first switching triode is connected with the other signal input end point of the pair of signal input ends through the upper bias resistor, the collector of the first switching triode forms the output end of the signal conversion unit, the output end of the signal acquisition unit is connected, and the collector of the first switching triode forms the output end of the signal conversion unit and is connected with the main control unit.
9. The control device for the fueling function of the warning oil gun according to any one of claims 1 to 8, characterized in that: the main control unit is also provided with a communication unit, the main control unit processes the input converted state signal of the oiling gun and then inputs the processed state signal of the oiling gun into the communication unit, and the state information of the oiling gun is transmitted to the monitoring system through the communication unit.
10. The control device for the fueling function of the warning oil gun as set forth in claim 9, wherein: the communication unit is composed of a 485 communication chip and peripheral elements thereof.
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