CN112374453A - Control device for oil filling function of alarming oil gun - Google Patents
Control device for oil filling function of alarming oil gun Download PDFInfo
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- CN112374453A CN112374453A CN202011016525.6A CN202011016525A CN112374453A CN 112374453 A CN112374453 A CN 112374453A CN 202011016525 A CN202011016525 A CN 202011016525A CN 112374453 A CN112374453 A CN 112374453A
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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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Abstract
The invention relates to a control device for alarming the oiling function of an oil gun, 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 an oil gun in real time and transmits the acquired oil gun state signal to the oiling machine mainboard and the main control unit; the signal control unit is arranged in a fuel gun state signal transmission channel between the fuel gun signal acquisition unit and the fuel dispenser mainboard; 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, controls an oil gun state signal transmission channel according to received alarm signals sent by the monitoring system and real-time oil gun state signals sent by the oil gun signal acquisition unit, further controls the work of an oil pump of the oil pump, eliminates interference, improves reliability, and meets the requirements of technical requirements of an oil gas recovery online monitoring system of a gas station, which are issued by the national ecological environment department in 2018.
Description
Technical Field
The invention relates to the technical field of oil gas recovery monitoring of a gas station, in particular to a control device capable of controlling an oiling machine to refuel after an oil gun alarms.
Background
The secondary recovered oil gas in the oil gas recovery technology of the gas station refers to volatile organic compounds generated when the oiling machine refuels an automobile oil tank through a refueling gun. In order to further enhance the environmental management of oil gas in a gas station, the national ecological environment department of 2018 issues technical requirements (draft of solicitation) of an online monitoring system for oil gas recovery in the gas station, and provides that a secondary oil gas recovery monitoring system (monitoring system for short) in the gas station has an early warning and alarming function of gas-liquid ratio: the method is characterized in that in 24h (natural day), when the monitoring system monitors that the effective gas-liquid ratio (the continuous oil filling amount is greater than 15L and recorded as one time each time) of any oil gun is less than 0.9 or more than 1.3, the number of times exceeds 25% of the total oil filling number of the gun, the monitoring system gives an alarm to the oil gun, the oil gun is in an early warning state for 7 days continuously, the oil gun stops the oil filling function during the alarm, and the oil filling function cannot be stopped during the oil filling process.
The requirement that the oil gun alarm should stop oiling is realized by a monitoring system in the prior art in a mode of controlling an electromagnetic valve. The electromagnetic valve is positioned on an oil path between the fuel truck nozzle and the fuel truck pump and is used for controlling the opening and closing of the oil path. The monitoring system judges whether to finish one-time refueling according to the generation and disappearance of the electromagnetic valve signal. When the oil gun gives an alarm in a non-oil-filling state, the monitoring system sends an alarm signal to the electromagnetic valve to control the electromagnetic valve to stop working and close the oil way. After the oil gun alarm is executed, when the oil gun is lifted again (signals generated by lifting or hanging back of the oil gun are called gun lifting signals or gun hanging signals for short), the gun lifting signals are normally sent to the oiling machine mainboard, and the oiling machine mainboard controls equipment such as an oil pump of the oiling machine to normally work, so that an oil path between the oiling machine and the electromagnetic valve 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 path from the electromagnetic valve to the oil gun is in an oil-free state, the oil gun cannot be filled with oil, and the function of stopping the gun in time after the oil gun alarms is realized.
When the oil gun gives an alarm in the oil filling process, the monitoring system executes the alarm after the oil filling is finished according to the requirement. If the refueling gun is not hung back and refueling is suspended, the electromagnetic valve signal is interrupted and an error signal of ending pseudo refueling is generated; at the moment, the monitoring system mistakenly judges that the oiling is finished at this time according to the error signal, and immediately controls the electromagnetic valve to stop working and close the oil way; when the oil gun continues to add oil, the oil gun cannot add oil due to the fact that the oil way is closed, and the monitoring system cannot meet the requirement that the gun cannot be stopped in the oil adding process after the oil gun gives an alarm.
Disclosure of Invention
The invention provides a control device for an oil filling function of an alarming oil gun, aiming at the problems that the oil filling function of the existing alarming oil gun is easy to operate by mistake, the requirement of 'technical requirement for oil gas recovery on-line monitoring system' of a gas station released by the national ecological environment department in 2018 is difficult to meet, and the oil can be filled by mistake.
In order to achieve the purpose, the invention discloses a control device for alarming the oiling function of an oil gun, which is characterized in that: the oil gun signal acquisition 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 data processing circuit composed of a microprocessor and peripheral elements thereof; the power supply unit provides a necessary 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 an oil gun in real time and transmits the acquired oil gun state signal to the oiling machine mainboard and the main control unit; the signal control unit is arranged in a fuel gun state signal transmission channel between the fuel gun signal acquisition unit and the fuel dispenser mainboard; 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 is controlled 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 modes:
(1) when the main control unit receives a normal signal, the main control unit controls the signal control unit to continuously open the oil gun state signal transmission channel;
(2) when the main control unit receives an alarm signal for the first time and the fuel truck nozzle is in a gun hanging state, the main control unit controls the signal control unit to close the fuel truck nozzle state signal transmission channel and keep closed, and the main control unit receives a signal sent by a monitoring system in real time;
(3) when the main control unit receives an 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 a 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 fuel truck is in a gun hanging state, the main control unit controls the signal control unit to seal the fuel truck state signal transmission channel and keep the closed state, and the main control unit receives signals sent by a monitoring system in real time;
(5) and when the main control unit receives the normal signal again, the main control unit controls the signal control unit to open the oil gun state signal transmission channel.
Compared with the prior art, the control device for alarming the oiling function of the oil gun 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 an oil gun in real time and transmits the acquired oil gun state signal to the oiling machine mainboard and the main control unit; the signal control unit is arranged in a fuel gun state signal transmission channel between the fuel gun signal acquisition unit and the fuel dispenser mainboard; 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, controls an oil gun state signal transmission channel according to received alarm signals sent by the monitoring system and real-time oil gun state signals sent by the oil gun signal acquisition unit, further controls the work of an oil pump of the oil pump, eliminates interference, improves reliability, and meets the requirements of technical requirements of an oil gas recovery online monitoring system of a gas station, which are issued by the national ecological environment department in 2018.
As a further arrangement of the invention, the oil gun signal acquisition unit comprises a signal acquisition unit and a signal conversion unit; the signal acquisition unit is equipped with the input and is connected with nozzle signal output and gather nozzle status signal in real time to divide into two the nozzle status signal: one path of signal is connected with the oiling machine mainboard through the signal control unit to provide an oiling gun state signal with the same type as the acquired signal for the oiling machine mainboard 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 the oil gun state signal is converted into a standard signal and is input into the main control unit; the oil gun signal acquisition circuit is also provided with a pair of signal input ends used for being connected with the oil gun state signal output end and a pair of oil gun state signal output ends connected with an external oiling machine mainboard.
As a further arrangement of the present invention, 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 includes transfer relay K2 and relay control circuit, relay control circuit receives the main control unit control, signal negative pole input among a pair of signal input with signal negative pole output among a pair of nozzle state signal output is connected, transfer relay K2's normally closed contact concatenates simultaneously signal positive input among a pair of signal input with signal positive pole output among a pair of nozzle state signal output and with constitute between the input of signal acquisition unit one kind of nozzle state signal transmission of the same type, the output of signal acquisition unit constitutes nozzle state signal transmission's another way output with the input of signal conversion unit is connected.
As a further arrangement of the present invention, the signal acquisition unit includes a second switching triode Q2, a first base current-limiting resistor R3 and a second load resistor R4, a collector of the second switching triode Q2 is connected with a positive electrode of a dc working power supply Vcc through the second load resistor R4, a collector of the second switching triode Q2 is connected with an input end of the signal conversion unit as an output end of the signal acquisition unit, an emitter of the second switching triode Q2 is connected with a negative input end of a signal and a negative electrode of the dc working power supply Vcc, and a base is connected with one end of a normally closed contact of the transfer relay K2 as an input end through a first base current-limiting resistor R3; 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 of the third switching triode Q3, the emitter of the third switching triode Q3 is connected with the negative electrode 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 to form the relay control circuit;
as a further configuration of the present invention, the signal conversion unit includes an upper bias resistor R1, a first load resistor R2, and a first switching transistor Q1, a collector of the first switching transistor Q1 is connected to a positive electrode of a dc working power supply Vcc through the first load resistor R2, an emitter is connected to a negative electrode of the dc working power supply Vcc, a base is connected to an output terminal of the signal acquisition unit through the upper bias resistor R1, and a collector of the first switching transistor Q1 forms an output terminal of the signal conversion unit and is connected to the main control unit.
As a further arrangement of the present invention, the signal acquisition unit circuit includes an acquisition relay K1; one signal input end 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 a 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 simultaneously serves as the output end of the signal acquisition unit to form the other path of the oil gun state signal transmission and is connected with the input end of the signal conversion unit, and one end of the 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.
The signal control unit further comprises a transfer relay K2, a third switching triode Q3 and a second base current-limiting resistor R5, two ends of a coil of the transfer relay K2 are respectively connected with a positive electrode of a direct-current working power supply Vcc and a collector of the third switching triode Q3, an emitter of the third switching triode Q3 is connected with a negative electrode of the direct-current working power supply Vcc, a base of the third switching triode Q3 is connected with an 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 transfer relay K2 is connected in series between the other end of two ends of a normally open contact of the acquisition relay K1 and the other end of the pair of oil gun state signal output ends to form one way of oil gun state signal transmission of the same type.
As a further configuration of the present invention, the signal conversion unit includes an upper bias resistor R1, a first load resistor R2, and a first switching transistor Q1, a collector of the first switching transistor Q1 is connected to a positive electrode of a dc working power supply Vcc through the first load resistor R2, an emitter of the first switching transistor Q1 is connected to a negative electrode of the dc working power supply Vcc, a base of the first switching transistor Q1 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 transistor 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 formed by a collector of the first switching transistor Q1 is connected to the main control unit.
The main control unit is further provided with a communication unit, the main control unit processes the input converted oil gun state signal and inputs the processed oil gun state signal to the communication unit, and the oil gun state information is transmitted to the monitoring system through the communication unit.
As a further arrangement of the present invention, the communication unit is composed of an application specific communication integrated chip and peripheral components thereof.
The invention is further described with reference to the following figures and specific embodiments.
Drawings
FIG. 1 is a schematic circuit diagram of an embodiment 1 of the present invention;
FIG. 2 is a schematic circuit diagram of an embodiment 2 of the present invention;
FIG. 3 is a circuit schematic of an embodiment of a communication unit of the present invention;
FIG. 4 is a schematic circuit diagram of an embodiment of a power supply unit of the present invention;
FIG. 5 is a block diagram of an embodiment of the present invention;
FIG. 6 is a block diagram illustrating the flow of control of an unannounced alarm signal in accordance with an embodiment of the present invention;
FIG. 7 is a block diagram of a control flow in an alarm state in accordance with an embodiment of the present invention;
fig. 8 is a block diagram of a control flow after an alarm signal is issued according to an embodiment of the present invention.
Detailed Description
As shown in FIG. 5, the control device for alarming the oiling function of the oil gun 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 data processing circuit composed of a microprocessor and peripheral elements thereof; the power supply unit provides a necessary 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 an oil gun in real time and sends the acquired oil gun state signal to the oiling machine mainboard and the main control unit; the signal control unit is arranged in a fuel gun state signal transmission channel between the fuel gun signal acquisition unit and the fuel dispenser mainboard; the oiling machine mainboard 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 filling 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 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 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 modes:
(1) when the main control unit receives a normal signal, the main control unit controls the signal control unit to continuously open the oil gun state signal transmission channel;
(2) when the main control unit receives an alarm signal for the first time and the fuel truck nozzle is in a gun hanging state, the main control unit controls the signal control unit to close the fuel truck nozzle state signal transmission channel and keep closed, and the main control unit receives a signal sent by a monitoring system in real time;
(3) when the main control unit receives an 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 a 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 fuel truck is in a gun hanging state, the main control unit controls the signal control unit to seal the fuel truck state signal transmission channel and keep the closed state, and the main control unit receives signals sent by a monitoring system in real time;
(5) and when the main control unit receives the normal signal again, the main control unit controls the signal control unit to open the oil gun state signal transmission channel.
The oil gun signal acquisition unit comprises a signal acquisition unit and a signal conversion unit. The signal acquisition unit is equipped with the input and is connected with nozzle signal output and gather nozzle status signal in real time to divide into two the nozzle status signal: one path of signal is connected with the oiling machine mainboard through the signal control unit to provide a oiling gun state signal (namely an unprocessed original level signal or a processed switch signal of the same type) of the same type as the acquired signal in real time for the oiling machine mainboard, the oiling machine mainboard controls the oiling machine oil pump to work according to the oiling gun state signal, and the other path of signal is input to the signal conversion unit, the oiling gun state signal is converted into a standard signal and input to the main control unit, interference is eliminated, so that a more accurate oiling gun state is acquired and then is sent to the monitoring system; the fuel gun 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 a fuel nozzle state signal is converted into a standard signal (a digital level signal or a switching value signal) and is input into the main control unit; the main control unit processes the input converted oil gun state signals, inputs the processed signals to the communication unit, and transmits the information of the oil filling machine 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 used for being connected with the oil gun state signal output end and a pair of oil gun state signal output ends connected with an external oiling machine mainboard.
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the preferred embodiments of the present application and the accompanying drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Detailed description of the preferred embodiment 1
As shown in fig. 1, in this embodiment, the control device for alarming the oil filling function of the oil gun 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 data processing circuit composed of a microprocessor and peripheral elements thereof; the power supply unit provides a necessary 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 transfer relay K2 and relay control circuit, relay control circuit receives the main control unit control, signal negative pole input among a pair of signal input with signal negative pole output among a pair of nozzle status signal output is connected, transfer relay K2's normally closed contact concatenates simultaneously signal positive input among a pair of signal input with signal positive output among a pair of nozzle status signal output and with constitute between the input of signal acquisition unit one way of nozzle status signal transmission of the same type, the output of signal acquisition unit constitutes another way output of nozzle status signal transmission with the input of signal conversion unit is connected.
Specifically, the signal control unit comprises a relay control circuit composed of a transfer relay K2, a second freewheeling diode D2, a third switching triode Q3 and a second base current-limiting resistor R5, two ends of a coil of the transfer relay K2 are respectively connected with a positive electrode of a direct-current working power supply Vcc and a collector of the third switching triode Q3, the second freewheeling diode D2 is connected in parallel with two ends of a coil of the transfer relay K2, an emitter of the third switching triode Q3 is connected with a negative electrode of the direct-current working power supply Vcc, and a base of the third switching triode Q3 is connected with an alarm signal output end of the main control unit through the second base current-limiting resistor R5; a signal negative input end of the pair of signal input ends is connected with a signal negative output end of the pair of oil gun state signal output ends;
the signal acquisition unit comprises a second switching triode Q2, a first base current-limiting resistor R3 and a second load resistor R4, a collector of the second switching triode Q2 is connected with a positive electrode of a direct-current working power supply Vcc through the second load resistor R4, a collector of the second switching triode Q2 is connected with an input end of the signal conversion unit as an output end of the signal acquisition unit, an emitter of the second switching triode Q2 is connected with a signal negative electrode input end and a negative electrode of the direct-current working power supply Vcc, and a base is connected with one end of a normally closed contact of the transfer relay K2 through a first base current-limiting resistor R3 as an input end;
the signal conversion unit is composed of a level conversion circuit, namely, a low level signal lower than a certain range is converted into a uniform low level signal, and a high level signal in a certain range is converted into a uniform high level signal. 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 transistor Q1, the collector of the first switching triode Q1 is connected with the positive pole of the direct current working power supply Vcc through a first load resistor R2, the emitter is connected with the negative pole of the direct current working power supply Vcc, one path of the base is connected with the collector of the second switching triode Q2 (namely the output end of the signal acquisition unit) through an upper bias resistor R1, and is connected with the positive electrode of the direct current working power supply Vcc through the second load resistor R4 to form a level switching circuit with a switching triode as a core (of course, the first switching triode Q1 may also be PNP type), the collector of the first switching triode Q1 forms the output end of the signal conversion unit, in order to improve the anti-interference capability, the base of the first switching transistor Q1 is preferably provided with another path of connection with the negative electrode of the direct-current working power supply Vcc through a filter capacitor C5. 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.
In order to more reliably transmit the information of the fuel dispenser 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 gun state signal and then inputs the processed signal to the communication unit, and the fuel gun state information is transmitted to the monitoring system through the communication unit. The communication unit is composed of an asic chip and its peripheral components, as shown in fig. 3, in this embodiment, a 485 chip may be used to obtain more reliable transmission characteristics.
The control device for the oiling function of the alarming oil gun is suitable for oiling machines in a pulse signal mode and a level signal mode, and the oiling machine in the 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 mainboard receives a low level signal, starts oiling machine equipment and prepares for oiling; when the monitoring system acquires a low level signal, the monitoring system judges that the oil gun is in a gun lifting state, namely, one-time oil filling is started; when the fuel truck nozzle is in a gun hanging state, a level signal in a high level state is provided; the oiling machine mainboard receives a high level signal, shuts down oiling machine equipment and stops oiling; the monitoring system judges that the oil gun is in a gun hanging state when acquiring a high level signal, namely, one-time oiling is finished.
The specific working principle of the oil gun signal acquisition unit is as follows:
when the gun is lifted, the input of the pair of signal input ends (the joint J4) is a low level signal, one path of the input low level signal is directly transmitted to the pair of oil gun state signal output ends to be connected (the joint J6), namely, the oil gun state signals of the same type are directly added to the oil machine main board, namely, one low level signal is output, and the oil machine main board starts oil machine equipment to prepare for oil adding; 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 by utilizing the NPN triode characteristic, the second switching triode Q2 is cut off at this time, and the collector is at a high level. The high level of the collector of the second switch triode Q2 is transmitted to the base pin of the first switch triode Q1 through the upper bias resistor R1, at the moment, the first switch triode Q1 is conducted, the input port S _ OG of the main control unit is pulled down to be a low level signal by the original high level, the main control unit judges that oiling is started, related information is transmitted to the monitoring system through the communication unit through the data transmission interface J8, the monitoring system stably obtains a gun lifting signal of the oiling gun, and the starting of one-time oiling is judged.
When the oil gun is hung back, a high level signal is input into the pair of signal input ends (the joint J4), one path of the input high level signal is directly transmitted to the pair of oil gun state signal output ends to be connected (the joint J6), namely, the oil gun state signals of the same type are directly added to the oil gun main board, namely, a high level signal is output, the oil gun main board closes the oil gun device, and the oil gun stops oiling; 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 this time, the second switching triode Q2 is turned on, and the collector is at a low level. The low level of the collector of the second switch triode Q2 is transmitted to the base pin of the first switch triode Q1 through the upper bias resistor R1, at the moment, the first switch 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, related information is transmitted to the monitoring system through the communication unit and the data transmission interface J8, the monitoring system can stably obtain a gun hanging signal of the oiling gun, and the finish of the oiling at one time is judged.
Specific example 2
As shown in fig. 2, in this embodiment, the control device for alarming the oil filling function of the oil gun 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 data processing circuit composed of a microprocessor and peripheral elements thereof; the power supply unit provides a necessary 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 specific embodiment, the signal acquisition unit circuit includes an acquisition relay K1, a first freewheeling diode D1; one signal input end 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 connected with the input end of the signal conversion unit and is also used as the other path of the output end of the signal acquisition unit for forming the oil gun state signal transmission, the first freewheeling diode D1 is connected with the two ends of the coil of the acquisition relay K1 in parallel, and one end of the two ends of the normally open contact of the acquisition relay K1 is connected with one end point;
the signal control unit comprises a relay control circuit consisting of a transfer relay K2, a second freewheeling diode D2, a third switching triode Q3 and a second base current-limiting resistor R5, two ends of the coil of the switching relay K2 are respectively connected with the positive pole of a direct current working power supply Vcc and the collector of a third switching triode Q3, the second freewheeling diode D2 is connected in parallel to two ends of the coil of the transfer relay K2, the emitter of the third switching triode Q3 is connected with the cathode 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 electrode current-limiting resistor R5 to form the relay control circuit, the normally closed contact of the switching relay K2 is connected in series between the other end point of the pair of oil gun state signal output ends and the other end point of the pair of oil gun state signal output ends to form a path for transmitting the oil gun state signals of the same type;
the signal conversion unit is composed of a level conversion circuit, namely, a low level signal lower than a certain range is converted into a uniform low level signal, and a high level signal in a certain range is converted into a uniform high level signal. 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 switch triode Q1, the first switch triode Q1 is NPN type, a collector of the first switch triode Q1 is connected to a positive electrode of a dc working power supply Vcc through a first load resistor R2, an emitter of the first switch triode Q is connected to a negative electrode of the dc working power supply Vcc, a base of the first switch triode Q3884 is connected to another signal input end point of the pair of signal input ends through an upper bias resistor R1, the collector of the first switch triode Q1 forms an output end of the signal conversion unit, an output end of the signal acquisition unit is connected, and the collector of the first switch triode Q1 forms an output end of the signal conversion unit and is connected to the main control unit.
In order to more reliably transmit the information of the fuel dispenser 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 gun state signal and then inputs the processed signal to the communication unit, and the fuel gun state information is transmitted to the monitoring system through the communication unit. The communication unit is composed of an asic chip and its peripheral components, as shown in fig. 3, in this embodiment, a 485 chip may be used to obtain more reliable transmission characteristics.
The control device for the oiling function of the alarming oil gun is suitable for the oiling machine in a solenoid valve signal mode, and under the 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 mainboard receives a closing switch signal, starts oiling machine equipment and prepares for oiling; the monitoring system judges that the oil gun is in a gun lifting state when acquiring a low level signal, namely, the primary oil filling is started;
when the fuel truck nozzle is in a gun hanging state, the electromagnetic valve can provide a switching signal in a disconnection state; the oiling machine mainboard receives a switch-off signal, turns off oiling machine equipment and stops oiling; when the monitoring system acquires a high-level signal, the gun is judged to be in a gun hanging state, namely, one-time refueling is finished.
The oil gun signal acquisition unit of the specific embodiment has the following specific working principle:
when the fuel gun is lifted, a switch signal in a closed state is received between the pair of signal input ends (No. 1 and No. 2 pins of the joint J2), namely the No. 1 pin of the J2 is a power VCC high level, a control coil between the No. 1 and No. 2 pins of the acquisition relay K1 is electrified, so that the switch between the No. 3 and No. 5 pins of the normally open contact of the acquisition relay K1 is changed from a normally open state to a normally closed state, the connection (joint J3) of the pair of fuel gun state signal output ends is controlled by the states of the No. 3 and No. 5 pins of the normally open contact of the acquisition relay K1, the pair of fuel gun state signal output ends (joint J3) output a switch signal in a closed state to output the same type signal of the fuel gun to a fuel dispenser mainboard, namely the same type of processed closed switch signal, and the fuel dispenser mainboard starts fuel dispenser equipment to;
meanwhile, a high level signal on the No. 1 pin of the pair of signal input ends (No. 1 and No. 2 pins of the joint J2) is transmitted to a base pin of a first switch triode Q1 through an upper biasing resistor R1, the first switch triode Q1 is conducted at the moment, an input port S _ OG of the main control unit is pulled down from the original high level to be a low level signal, the main control unit judges that refueling starts, relevant information is transmitted to the monitoring system through a communication unit and a data transmission interface J8, the monitoring system can stably obtain a gun lifting signal of the refueling gun, and one-time refueling starts is judged.
When the fuel gun is hung back, a switching signal in an off state is received between the pair of signal input ends (No. 1 and No. 2 pins of the joint J2), namely the No. 1 pin of the J2 is disconnected with a power supply VCC, a control coil between the No. 1 and No. 2 pins of the acquisition relay K1 loses power, so that the switch between the No. 3 and No. 5 pins of the normally open contact of the acquisition relay K1 is changed from a closed state to an off state, the connection (joint J3) of the pair of fuel gun state signal output ends is controlled by the states of the No. 3 and No. 5 pins of the normally open contact of the acquisition relay K1, the pair of fuel gun state signal output ends (joint J3) output a switching signal in an off state to output the same type signal of the fuel gun to a fuel dispenser mainboard, namely the same type switching signal after processing, and the fuel dispenser mainboard closes fuel dispensing equipment to stop fuel; meanwhile, because the No. 1 pin of the pair of signal input ends (No. 1 and No. 2 pins of the joint J2) is a low level signal, the low level signal is transmitted to the base pin of the first switch triode Q1 through the upper biasing resistor R1, the first switch triode Q1 is cut off at the moment, the input port S _ OG of the main control unit is pulled up to a high level signal from the original low level, the main control unit judges that refueling is finished, relevant information is transmitted to the monitoring system through the communication unit and the data transmission interface J8, the monitoring system stably obtains a gun hanging signal of the refueling gun, and judges that refueling is finished once.
The working principle of the control device for the oil filling function of the alarm oil gun is as follows:
the monitoring system monitors whether the frequency that the effective gas-liquid ratio (the continuous oil filling amount is greater than 15L and recorded as one time) of the oil filling gun is less than 0.9 or greater than 1.3 exceeds 25% of the total frequency of oil filling of the gun in real time, and if the frequency does not exceed 25% of the total frequency of oil filling of the gun, the monitoring system sends a normal signal or releases an alarm signal to the main control unit; if the number of times of refueling by the gun exceeds 25% after 7 days, the monitoring system sends out a refueling gun alarm signal to the main control unit, the refueling function of the refueling gun is stopped during alarming, and the refueling function cannot be stopped during refueling.
The specific control flow is shown in fig. 6-8.
The above examples are merely illustrative for clarity and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The utility model provides a warning oil gun refuels controlling means of function which characterized in that: the oil gun signal acquisition 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 data processing circuit composed of a microprocessor and peripheral elements thereof; the power supply unit provides a necessary 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 an oil gun in real time and transmits the acquired oil gun state signal to the oiling machine mainboard and the main control unit; the signal control unit is arranged in a fuel gun state signal transmission channel between the fuel gun signal acquisition unit and the fuel dispenser mainboard; 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 is controlled 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 modes:
(1) when the main control unit receives a normal signal, the main control unit controls the signal control unit to continuously open the oil gun state signal transmission channel;
(2) when the main control unit receives an alarm signal for the first time and the fuel truck nozzle is in a gun hanging state, the main control unit controls the signal control unit to close the fuel truck nozzle state signal transmission channel and keep closed, and the main control unit receives a signal sent by a monitoring system in real time;
(3) when the main control unit receives an 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 a 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 fuel truck is in a gun hanging state, the main control unit controls the signal control unit to seal the fuel truck state signal transmission channel and keep the closed state, and the main control unit receives signals sent by a monitoring system in real time;
(5) and when the main control unit receives the normal signal again, the main control unit controls the signal control unit to open the oil gun state signal transmission channel.
2. The control device for the refueling function of the warning oil gun as recited in claim 1, wherein: the oil gun signal acquisition unit comprises a signal acquisition unit and a signal conversion unit; the signal acquisition unit is equipped with the input and is connected with nozzle signal output and gather nozzle status signal in real time to divide into two the nozzle status signal: one path of signal is connected with the oiling machine mainboard through the signal control unit to provide an oiling gun state signal with the same type as the acquired signal for the oiling machine mainboard 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 the oil gun state signal is converted into a standard signal and is input into the main control unit; the oil gun signal acquisition circuit is also provided with a pair of signal input ends used for being connected with the oil gun state signal output end and a pair of oil gun state signal output ends connected with an external oiling machine mainboard.
3. The control device for the refueling function of the warning oil gun as recited in claim 2, wherein: 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 includes transfer relay and relay control circuit, relay control circuit receives the main control unit control, signal negative pole input among a pair of signal input with signal negative pole output among a pair of nozzle state signal output is connected, transfer relay's normally closed contact concatenates simultaneously signal positive input among a pair of signal input with signal positive output among a pair of nozzle state signal output and with constitute between the input of signal acquisition unit one kind of nozzle state signal transmission of the same type, the output of signal acquisition unit constitutes another way output of nozzle state signal transmission with the input of signal conversion unit is connected.
4. The control device for the refueling function of the warning oil gun as recited in claim 3, wherein: the signal acquisition unit comprises a second switch triode, a first base current-limiting resistor and a second load resistor, a collector of the second switch triode is connected with the positive electrode of the direct-current working power supply through the second load resistor, the collector of the second switch triode is used as the output end of the signal acquisition unit and is connected with the input end of the signal conversion unit, an emitter of the second switch triode is connected with the negative electrode input end of the signal and the negative electrode of the direct-current working power supply, and the base is connected with one end of the normally-closed contact of the transfer relay through the first base current-limiting resistor as the input end; the signal control unit comprises a conversion relay, a third switching triode and a second base current-limiting resistor, two ends of a coil of the conversion relay 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 current-limiting resistor and is connected with the alarm signal output end of the main control unit to form the relay control circuit.
5. The control device for the refueling function of the warning oil gun as recited in claim 3, wherein: the signal conversion unit comprises an upper bias resistor, a first load resistor and a first switch triode, wherein a collector of the first switch triode is connected with the positive electrode of the direct-current working power supply through the first load resistor, an emitter of the first switch triode is connected with the negative electrode of the direct-current working power supply, a base of the first switch triode is connected with the output end of the signal acquisition unit through the upper bias resistor, and the collector of the first switch triode forms the output end of the signal conversion unit and is connected with the main control unit.
6. The control device for the refueling function of the warning oil gun as recited in claim 2, wherein: the signal acquisition unit circuit comprises an acquisition relay; one signal input end of the pair of signal input ends is connected with the positive pole of the direct-current working power supply, one end of the acquisition relay coil is connected with the negative pole of the direct-current working power supply, the other end of the acquisition relay coil is connected with the other signal input end of the pair of signal input ends, the other end of the acquisition relay coil simultaneously serves as the output end of the signal acquisition unit to form the other path of the oil gun state signal transmission and is connected with the input end of the signal conversion unit, and one end of the two ends of the normally open contact of the acquisition relay is connected with one end of the pair of oil gun state signal output ends.
7. The control device for the refueling function of the warning oil gun as recited in 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 of a third switch triode, an emitting electrode of the third switch triode is connected with a negative electrode of the direct-current working power supply, a base electrode of the third switch 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 the two ends of the normally open contact of the acquisition relay and the other end of the two ends of the pair of oil gun state signal output ends to form one path of oil gun state signal transmission.
8. The control device for the refueling function of the warning oil gun as recited in claim 6, wherein: the signal conversion unit comprises an upper bias resistor, a first load resistor and a first switch triode, wherein a collector of the first switch triode is connected with the positive electrode of the direct-current working power supply through the first load resistor, an emitter of the first switch triode is connected with the negative electrode of the direct-current working power supply, a base of the first switch triode is connected with the other signal input end point of the pair of signal input ends through the upper bias resistor, a collector of the first switch 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 switch triode forms the output end of the signal conversion unit and is connected with the main control unit.
9. The control device for the refueling function of the warning grease gun according to any one of claims 1 to 8, wherein: the main control unit is also provided with a communication unit, the main control unit processes the input converted oil gun state signals and inputs the processed oil gun state signals to the communication unit, and the oil gun state information is transmitted to the monitoring system through the communication unit.
10. The control device for the refueling function of an alarming oil gun as recited in claim 9, wherein: the communication unit is composed of a special communication integrated chip and peripheral elements thereof.
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Cited By (1)
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| WO2023241744A3 (en) * | 2022-12-23 | 2024-02-15 | 能链能科(青岛)控股有限公司 | Data processing apparatus, method and system for fuel dispenser, and storage medium and electronic device |
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