CN113833368A - System and method for detecting locking state of small refueling door of vehicle fuel tank - Google Patents
System and method for detecting locking state of small refueling door of vehicle fuel tank Download PDFInfo
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- CN113833368A CN113833368A CN202010513781.XA CN202010513781A CN113833368A CN 113833368 A CN113833368 A CN 113833368A CN 202010513781 A CN202010513781 A CN 202010513781A CN 113833368 A CN113833368 A CN 113833368A
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- door lock
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- refueling
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/54—Electrical circuits
- E05B81/64—Monitoring or sensing, e.g. by using switches or sensors
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/02—Power-actuated vehicle locks characterised by the type of actuators used
- E05B81/04—Electrical
- E05B81/06—Electrical using rotary motors
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/54—Electrical circuits
- E05B81/56—Control of actuators
- E05B81/62—Control of actuators for opening or closing of a circuit depending on electrical parameters, e.g. increase of motor current
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B81/00—Power-actuated vehicle locks
- E05B81/54—Electrical circuits
- E05B81/64—Monitoring or sensing, e.g. by using switches or sensors
- E05B81/72—Monitoring or sensing, e.g. by using switches or sensors the lock status, i.e. locked or unlocked condition
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B83/00—Vehicle locks specially adapted for particular types of wing or vehicle
- E05B83/28—Locks for glove compartments, console boxes, fuel inlet covers or the like
- E05B83/34—Locks for glove compartments, console boxes, fuel inlet covers or the like for fuel inlet covers essentially flush with the vehicle surface
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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Lock And Its Accessories (AREA)
Abstract
The invention discloses a system and a method for detecting the locking state of a refueling small door of a vehicle oil tank. Therefore, the detection system can effectively judge the working state of the small refueling door lock in real time under the condition of ensuring that no special lock position sensor exists at present, and can correctly detect faults such as current invalidation and the like of the small refueling door lock. Therefore, the invention reduces the cost of the parts of the fuel filling system, ensures the normal work of the fuel filling system, diagnoses the fault of the small refueling door lock in time and reduces the potential safety hazard to a certain extent.
Description
Technical Field
The invention relates to the technical field of automobile fuel filling systems, in particular to a system and a method for detecting the locking state of a refueling door of a vehicle fuel tank.
Background
The common opening mode of the small refueling door of the automobile oil tank comprises the steps that 1) the small refueling door opening handle in a cab is operated, and a pull wire pulls a lock tongue of a small refueling door locking mechanism to open the small refueling door; 2) the sealing cover is clamped on the oil filler box or automatically bounces up under the action of an elastic element by matching a clamping and locking assembly (130) arranged in the oil filler with a clamping hole (103) in the sealing cover (as shown in figure 1); 3) the locking pin (24) of the small oiling door retracts from the locking hole (12) of the inner plate of the small oiling door through the motor, and after the locking pin is separated from the locking hole, the small oiling door bounces under the action of the elastic force of the spring (as shown in figures 2 and 3).
Currently, the type of the 'national six' hybrid vehicle meets the relevant regulatory requirements of evaporative emission in a matching way, and most of the hybrid vehicles use pressure oil tanks. The pressure difference between the inside and the outside of the pressure oil tank is possibly large, and if the small refueling door is directly opened, oil vapor is shot out, so that the hidden danger of hurting people exists. Therefore, an electric locking mechanism is added at the small refueling door of the automobile type, and the small refueling door can not be opened when the pressure in the oil tank is not in the standard atmospheric pressure range.
However, in the prior art, the lock state cannot be detected when the motor drives the refueling small door to lock, so that certain potential safety hazards exist.
Disclosure of Invention
The invention aims to solve the problem that the lock state cannot be detected when a motor drives an oil filling small door to work in the prior art, so that certain potential safety hazards exist. The invention provides a system and a method for detecting the locking state of a refueling small door of a vehicle fuel tank.
In order to solve the technical problem, the embodiment of the invention discloses a detection system for the state of an oil filling small door lock of a vehicle oil tank, which comprises a lock state judgment unit, a controller, a driving chip and an oil filling small door lock driving motor, wherein the driving chip is used for controlling the action of the oil filling small door lock driving motor; wherein the content of the first and second substances,
the controller is in communication connection with the driving chip and is used for sending a locking or unlocking instruction to the driving motor of the small refueling door lock;
the driving chip is in communication connection with the lock state judging unit, acquires a current signal of the driving motor of the small accelerator lock and sends the current signal to the lock state judging unit;
the lock state judgment unit receives the current signal and the locking instruction or the unlocking instruction, and judges to obtain the working state of the small refueling door lock.
By adopting the technical scheme, the detection system provided by the invention can effectively judge the working state of the small refueling door lock in real time under the condition of ensuring that no special lock position sensor exists at present, and can correctly detect the faults of current invalidation and the like of the small refueling door lock. Therefore, the invention reduces the cost of the parts of the fuel filling system, ensures the normal work of the fuel filling system, diagnoses the fault of the small refueling door lock in time and reduces the potential safety hazard to a certain extent.
According to another specific embodiment of the invention, another specific embodiment of the invention discloses a system for detecting the lock state of a refueling door of a vehicle oil tank, which further comprises a nonvolatile memory in communication connection with a lock state judgment unit, wherein the nonvolatile memory and a controller are respectively in communication connection with the lock state judgment unit;
when the controller is powered off, the lock state judgment unit stores the working state of the small refueling door lock into the nonvolatile memory;
when the controller is powered on, the lock state judgment unit reads the working state of the refueling small door lock from the nonvolatile memory.
According to another embodiment of the invention, another embodiment of the invention discloses a system for detecting the state of a refueling door lock of a vehicle fuel tank, wherein the working state comprises the following steps: locked, unlocked and indeterminate states.
According to another embodiment of the present invention, another embodiment of the present invention discloses a system for detecting a state of a refueling hatch of a vehicle fuel tank, wherein a lock state determination unit receives a current signal and determines a working state of the refueling hatch by combining a locking instruction or an unlocking instruction, and the system comprises the following steps:
preprocessing the current signal to obtain a processed signal:
the processing signal is in a preset calibration locked-rotor current range, and a locking instruction or an unlocking instruction is received, and the working state is judged to be locked or unlocked; wherein the content of the first and second substances,
if the processing signal is less than-400 mA and greater than-1800 mA, and an unlocking instruction is received, the unlocking state is determined;
if the processing signal is greater than 400mA and less than 1800mA, and a locking instruction is received, the locking state is judged;
and the processing signal is out of the preset calibration locked-rotor current range, and a locking instruction or an unlocking instruction is received, so that the working state is determined to be uncertain, including idling, loading and short circuit.
According to another embodiment of the present invention, a system for detecting the status of a refueling door lock of a vehicle fuel tank is disclosed, wherein the system is configured to detect the status of the refueling door lock of the vehicle fuel tank when a locking or unlocking command is invalid, or,
if the driving chip does not send a locking instruction or an unlocking instruction to the driving motor of the small refueling door lock,
and judging that the processing signal is greater than the preset calibration leakage current to be in an uncertain state.
According to another embodiment of the invention, another embodiment of the invention discloses a system for detecting the state of a refueling door lock of a vehicle oil tank, which further comprises a signal receiver, wherein the signal receiver is arranged in a refueling door lock driving motor; wherein, after the driving chip sends a locking instruction or an unlocking instruction to the driving motor of the small refueling door lock,
and if the signal receiver does not receive the locking instruction or the unlocking instruction, judging that the locking instruction or the unlocking instruction is invalid.
According to another embodiment of the present invention, another embodiment of the present invention discloses a system for detecting a fuel filling door lock state of a vehicle fuel tank, wherein the preprocessing the current signal to obtain a processed signal comprises:
and carrying out mean value filtering and debounce processing on the current signal.
According to another embodiment of the present invention, another embodiment of the present invention discloses a system for detecting a state of a refueling door lock of a vehicle fuel tank, the system further comprising:
the timing unit is in communication connection with the driving chip, the driving chip acquires a processing signal of the driving motor of the small accelerator lock and sends the processing signal to the timing unit, and the timing unit is used for measuring the adjustment time required by the processing signal from 0 to a preset calibration locked-rotor current range;
if the adjusting time is more than or equal to the calibration value, judging that the lock tongue of the small refueling door lock is not blocked;
if the adjusting time is less than the calibration value, judging that the lock tongue of the small refueling door lock is blocked for a single time; wherein the content of the first and second substances,
when the accumulated times of single clamping stagnation reaches a calibrated value of the times of clamping stagnation, the clamping stagnation fault of the lock tongue of the small refueling door lock is judged to occur;
wherein the calibration value is between 8 and 16 ms; the number of stuck times is calibrated to be 3 times.
According to another embodiment of the present invention, another embodiment of the present invention discloses a system for detecting a state of a refueling door lock of a vehicle fuel tank, the system further comprising:
spring bolt jamming counter, spring bolt jamming counter and timing unit communication connection, timing unit judge that refuel little lock's spring bolt takes place single jamming when sending the spring bolt jamming counter with the single jamming, and the spring bolt jamming counter receives the single jamming and counts, if the count is greater than 3 times, then judges to take place the jamming trouble.
According to another specific embodiment of the invention, another specific embodiment of the invention discloses a detection system for the state of a refueling small door lock of a vehicle oil tank, and the detection system further comprises an external A/D sampling circuit which is in communication connection with a driving chip and is used for acquiring the load current of a refueling small door lock motor, and obtaining a current signal according to the load current and sending the current signal to a lock state judgment unit.
The invention also provides a detection method for the state of the small door lock for the refueling of the vehicle oil tank, which is used for detection by using the detection system for the state of the small door lock for the refueling of the vehicle oil tank, and the detection method comprises the following steps:
acquiring a current signal of a driving motor of the small accelerator lock;
receiving a locking instruction or an unlocking instruction of a controller;
the current signal is combined with a locking instruction or an unlocking instruction to judge to obtain the working state of the small refueling door lock; wherein the content of the first and second substances,
the working state comprises the following steps: locked, unlocked and indeterminate states.
By adopting the technical scheme, the detection method provided by the invention can effectively judge the working state of the small refueling door lock in real time under the condition of ensuring that no special lock position sensor exists at present, and can correctly detect uncertain faults such as current invalidation and the like of the small refueling door lock. Therefore, the invention reduces the cost of the parts of the fuel filling system, ensures the normal work of the fuel filling system, diagnoses the fault of the small refueling door lock in time and reduces the potential safety hazard to a certain extent.
According to another embodiment of the invention, another embodiment of the invention discloses a method for detecting the state of a small fuel door lock of a vehicle fuel tank, which comprises the following steps of:
preprocessing the current signal to obtain a processed signal:
the processing signal is in a preset calibration locked-rotor current range, and a locking instruction or an unlocking instruction is received, and the working state is judged to be locked or unlocked; wherein the content of the first and second substances,
if the processing signal is less than-400 mA and greater than-1800 mA, and an unlocking instruction is received, the unlocking state is determined;
if the processing signal is greater than 400mA and less than 1800mA, and a locking instruction is received, the locking state is judged;
and the processing signal is out of the preset calibration locked-rotor current range, and a locking instruction or an unlocking instruction is received, so that the working state is determined to be uncertain, including idling, loading and short circuit.
The invention has the beneficial effects that:
the invention provides a detection system for the locking state of a small fuel filling door of a vehicle fuel tank, which can effectively judge the working state of the small fuel filling door lock in real time and correctly detect the faults of current invalidation and the like of the small fuel filling door lock under the condition of ensuring that no special lock position sensor exists at present. Therefore, the invention reduces the cost of the parts of the fuel filling system, ensures the normal work of the fuel filling system, diagnoses the fault of the small refueling door lock in time and reduces the potential safety hazard to a certain extent.
Drawings
FIG. 1 is a schematic view of a first refueling door assembly provided in the prior art;
FIG. 2 is an isometric view of a second prior art refueling door assembly;
FIG. 3 is a front view of the second refueling door assembly shown in FIG. 2;
FIG. 4 is a schematic signal connection diagram of a system for detecting the state of a fuel door lock of a vehicle fuel tank according to embodiment 1 of the present invention;
fig. 5 is a current curve diagram of forward locked rotation of a small fuel door lock driving motor of the system for detecting the state of the small fuel door lock of the vehicle fuel tank in embodiment 1 of the present invention;
fig. 6 is a current curve diagram of idle running of a refueling door lock driving motor of the system for detecting the state of the refueling door lock of the vehicle fuel tank in embodiment 1 of the invention;
fig. 7 is a current curve diagram of a fuel filling door lock driving motor of the system for detecting a fuel filling door lock state of a vehicle fuel tank according to embodiment 1 of the present invention, in which a lock tongue is not jammed when the fuel filling door lock driving motor is locked in a forward direction;
fig. 8 is a current curve diagram of the lock tongue jamming occurring when the refueling small door lock driving motor of the system for detecting the state of the refueling small door lock of the vehicle fuel tank provided by the embodiment 1 of the invention reversely stalls;
fig. 9 is a flowchart illustrating a detecting system of a lock state of a refueling door of a vehicle fuel tank according to embodiment 1 of the present invention, wherein a lock tongue of the refueling door lock is in a stuck fault;
fig. 10 is a flowchart illustrating a detection system for detecting a state of a refueling door lock of a vehicle fuel tank according to embodiment 1 of the present invention, wherein the refueling door lock drives a motor to generate a current invalid fault;
fig. 11 is a lock state detection flowchart of a refueling door lock of the system for detecting the state of the refueling door lock of the vehicle fuel tank according to embodiment 1 of the present invention;
fig. 12 is a diagram showing the detection effect of the lock state of the small fuel door lock of the detection system for the lock state of the small fuel door of the fuel tank of the vehicle provided in embodiment 1 of the present invention;
fig. 13 is a flowchart of a method for detecting a state of a fuel door lock of a vehicle fuel tank according to embodiment 2 of the present invention.
Description of prior art reference numerals:
12. an inner plate lock hole of the small oiling door; 103. a clamping hole; 130. a latch assembly; 24. and a locking pin.
Description of the reference numerals of the invention:
10. a lock state judgment unit; 20. a controller; 30. a driving chip; 40. a driving motor of the small refueling door lock; 50. a refueling small door lock; 60. a non-volatile memory; 70. a signal receiver; 80. a timing unit; 90. the spring bolt jamming counter.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention.
The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example 1:
in order to solve the problem that the lock state cannot be detected when the motor-driven refueling small door lock works in the prior art, so that certain potential safety hazards exist, as shown in fig. 4-12, the embodiment of the embodiment discloses a detection system for the refueling small door lock state of a vehicle oil tank, which comprises a lock state judgment unit 10, a controller 20, a driving chip 30 and a refueling small door lock driving motor 40, wherein the driving chip 30 is in communication connection with the refueling small door lock driving motor 40 and is used for controlling the refueling small door lock driving motor 40 to execute relevant actions when the driving chip 30 sends a locking or unlocking instruction; when the small refueling door lock driving motor 40 executes a locking or unlocking instruction, the driving chip 30 acquires a current signal of the small refueling door lock driving motor 40 and sends the current signal to the lock state judgment unit 10; the lock state determining unit 10 receives the current signal and determines the working state of the refueling door lock 50, and the specific determining process will be described in detail below. The controller 20, the driving chip 30 and the fueling door lock driving motor 40 may specifically select a corresponding component model from existing common models, which is not specifically limited in this embodiment.
As for fig. 5 to 8, the experimental conditions are that the current value of the fueling small door lock 50 in the corresponding operating state is read by the APE at normal temperature (20 ℃) and the adjustment time or the lock state calculated by the lock state determination unit 10. In addition, it should be understood that the lock motor or motors in fig. 11 are all the refueling door lock drive motors 40 herein.
In summary, the detection system provided in this embodiment can still effectively determine the working state of the fueling small door lock 50 in real time and correctly detect the current invalidation and other faults of the fueling small door lock under the condition that it is ensured that no special lock position sensor exists at present. Therefore, the fuel filling system can work normally while the cost of parts of the fuel filling system is reduced, the fault of the small refueling door lock can be diagnosed in time, and potential safety hazards are reduced to a certain extent.
As shown in fig. 4-12, according to another embodiment of the present embodiment, another embodiment of the present embodiment discloses a system for detecting the lock status of a refueling door of a vehicle fuel tank, further comprising a non-volatile memory 60 communicatively connected to the lock status determining unit 10, wherein the non-volatile memory 60 and the controller 20 are communicatively connected to the lock status determining unit 10 respectively; when the controller 20 is powered off, the lock state judgment unit 10 stores the operating state of the refueling door lock into the nonvolatile memory 60; when the controller 20 is powered on, the lock state judgment unit 10 reads the operating state of the fuel filler door lock from the nonvolatile memory 60 for performing the judgment of the operating state of the lock. The specific lock operating conditions include: locking, unlocking and uncertainty, specifically refer to fig. 11, and fig. 11 is a flowchart of detecting the state of the refueling door lock 50. The model of the non-volatile memory 60 may be: RR331200-100PRS/JT may be of other models, which is specifically selected according to actual needs, and this embodiment is not specifically limited thereto.
As shown in fig. 4 to 12, according to another embodiment of this embodiment, another embodiment of this embodiment discloses a system for detecting a state of a refueling door lock of a vehicle oil tank, where the lock state determination unit 10 receives a current signal and a locking instruction or an unlocking instruction, and determines an operating state of the refueling door lock 50, including the following steps: the lock state determination unit 10 receives the current signal and preprocesses the current signal to obtain a processed signal, where the preprocessing is described below.
More specifically, as shown in fig. 12, if the processing signal is within the preset calibrated locked-rotor current range and a locking command or an unlocking command is received, the working state of the lock is determined to be locked or unlocked, and the following can be obtained according to the state curve relation diagram of the lock shown in fig. 12: the left ordinate is current, the right ordinate is lock state, the abscissa is time, and it can be seen from fig. 12 that when the current is lower than-400 mA and higher than-1800 mA, the lock state is unlocked, and when the current is higher than 400mA and lower than 1800mA, the lock state is locked, so that the specific preset calibration locked-rotor current range is (-1800mA, -400mA) or (400mA,1800 mA). Specifically, if the processing signal is within the range of (-1800mA, -400mA) and the unlocking instruction is received, it is determined that the small fuel door lock 50 is in the unlocked state; if the processing signal is within the range (400mA,1800mA) and the locking instruction is received, the small refueling door lock 50 is judged to be in the locking state; the processing signal is outside the preset calibration locked-rotor current range, namely, is within the range of [ -400mA, 400mA ] or (— infinity, -1800mA ] or [1800mA, + ∞ ]), and the locking instruction or the unlocking instruction is received, the working state of the small refueling door lock 50 is determined to be an uncertain state, and the uncertain state comprises idle running, load carrying and short circuit.
Specifically, the idle running uncertainty may be detected by an idle running counter, and if the idle running invalidity occurs more than a first preset value, for example, 3 times, the idle running uncertainty is considered to have occurred. The uncertain belt load can be detected by a belt load counter, and if the times of the invalid belt load are greater than a second preset value, for example, 3 times, the uncertain belt load is considered to occur. The short circuit uncertainty can be detected by the short circuit counter, and if the number of times of short circuit invalidation is greater than a third preset value, for example, 3 times, it is determined that the loaded uncertainty occurs, specifically refer to fig. 10, where fig. 10 is a flow chart of current invalidation fault detection.
As shown in fig. 4-12, according to another embodiment of the present invention, another embodiment of the present invention discloses a system for detecting the locking state of a refueling door of a vehicle fuel tank, when a locking or unlocking command is invalid, or,
if the driver chip 30 does not send a lock or unlock command to the fueling door lock drive motor 40,
the processing signal is greater than the preset calibrated leakage current, and is determined as an uncertain state, which may specifically refer to fig. 10 and 11. The uncertain leakage can be detected by the leakage timer, and if the invalid leakage time is longer than a preset time period, for example, 5 minutes, the uncertain leakage is considered to occur, which is specifically referred to fig. 10. Specifically, the preset calibrated leakage current may be 25mA, and the preset calibrated leakage current value may be selected according to different models of the small fuel door lock 50, which is not specifically limited in this embodiment.
As shown in fig. 4-12, according to another embodiment of the present embodiment, another embodiment of the present embodiment discloses a system for detecting the state of a refueling door lock of a vehicle fuel tank, the system further includes a signal receiver 70, the signal receiver 70 is disposed in the refueling door lock driving motor 40; after the driving chip 30 sends a locking or unlocking instruction to the fueling door lock driving motor 40, if the signal receiver 70 does not receive the locking or unlocking instruction, it is determined that the locking or unlocking instruction is invalid. The signal receiver 70 may be of the type: the DC1800 may also be of other types, which is specifically selected according to actual needs, and this embodiment is not specifically limited to this.
As shown in fig. 4 to 12, according to another specific embodiment of this embodiment, another specific embodiment of this embodiment discloses a system for detecting a state of a refueling door lock of a vehicle fuel tank, where preprocessing a current signal to obtain a processed signal includes: and carrying out mean value filtering and debounce processing on the current signal. The mean filtering is also called linear filtering, and the main method adopted by the mean filtering is a neighborhood averaging method. The basic principle of linear filtering is to replace each pixel value in the original image with the mean value, i.e. the current pixel point (x, y) to be processed, select a template, which is composed of a plurality of pixels adjacent to the template, find the mean value of all pixels in the template, and then give the mean value to the current pixel point (x, y) as the gray level g (x, y) of the processed image at the point, i.e. g (x, y) ═ f (x, y)/m m is the total number of pixels including the current pixel in the template. The debounce processing means that the signal acquisition time is delayed for a while and the jitter time of signal instability is crossed. The current signal is more accurate through mean filtering and debounce processing.
As shown in fig. 4 to 12, according to another specific embodiment of this embodiment, another specific embodiment of this embodiment discloses a system for detecting a state of a refueling door lock of a vehicle fuel tank, where the system further includes:
the timing unit 80 is in communication connection with the driving chip 30, the driving chip 30 acquires a processing signal of the driving motor 40 of the small accelerator lock and sends the processing signal to the timing unit 80, and the timing unit 80 is used for measuring the adjustment time required by the processing signal from 0 to a preset calibration locked-rotor current range;
if the adjustment time is greater than or equal to the calibration value, it is determined that the lock tongue of the small refueling door lock 50 is not jammed, specifically referring to fig. 7-8, fig. 7 is a schematic diagram of the lock tongue jamming when the small refueling door lock driving motor 40 is locked in the forward direction, and fig. 8 is a schematic diagram of the lock tongue jamming when the small refueling door lock driving motor 40 is locked in the reverse direction;
if the adjusting time is less than the calibration value, determining that the lock tongue of the small refueling door lock 50 is blocked for a single time; wherein the content of the first and second substances,
and when the accumulated times of the single clamping stagnation times reach the calibration value of the clamping stagnation times, the clamping stagnation fault of the lock tongue of the small refueling door lock 50 is determined.
Specifically, the time width of the set time is calibrated in fig. 5, that is, the calibrated value in this embodiment, wherein the abscissa is time and the ordinate is current, so that the time of the calibrated value is between 8-16ms, in addition, in fig. 7, the ordinate is current and the abscissa is time, and in fig. 7, the adjustment time is about 40ms and is significantly greater than 8-16ms, so that it is determined that the lock tongue of the small fueling door lock 50 is not subjected to single jamming, and in fig. 8, the ordinate is current and the abscissa is time, and in fig. 8, the adjustment time is about 1ms and is significantly less than 8-16ms, so that it is determined that the lock tongue of the small fueling door lock 50 is subjected to single jamming.
More specifically, the calibration value of the number of times of jamming is 3 times, which may also be not limited to the example of this embodiment, and the jamming fault may be determined only when 5 times of single jamming occurs, and specifically, the calibration value of the number of times of jamming is set according to actual needs, which is not specifically limited in this embodiment.
In addition, the timing unit 80 may be: eia timing software may be other software, and is specifically selected according to actual needs, which is not specifically limited in this embodiment.
As shown in fig. 4 to 12, according to another specific embodiment of this embodiment, another specific embodiment of this embodiment discloses a system for detecting a state of a refueling door lock of a vehicle fuel tank, where the system further includes:
spring bolt jamming counter 90, spring bolt jamming counter 90 and timing unit 80 communication connection, timing unit 80 judges that refuel 50 little lock's spring bolt takes place single jamming and send single jamming for spring bolt jamming counter 90, and spring bolt jamming counter 90 receives single jamming and counts to if the count is greater than 3 times, then judge that refuel 50 little lock's spring bolt takes place jamming trouble. For a specific process of determining whether a stuck fault occurs, reference may be made to fig. 9, where fig. 9 is a stuck fault logic determination diagram. The model number of the bolt jamming counter 90 may be: the SF-G1 may be of other types, which are specifically selected according to actual needs, and this embodiment is not specifically limited in this respect.
As shown in fig. 4 to 12, according to another specific implementation manner of this embodiment, another specific implementation manner of this embodiment discloses a system for detecting a state of a small fuel filling door lock of a vehicle fuel tank, where the system further includes an external a/D sampling circuit in communication connection with the driving chip 30, and is configured to obtain a load current of the small fuel filling door lock motor 40, and obtain a current signal according to the load current, and send the current signal to the lock state judgment unit 10. The a/D sampling circuit may be selected according to actual needs, which is not specifically limited in this embodiment. More specifically, the driving chip 30 connected in communication with the fueling small door lock driving motor 40 senses the load current of the fueling small door lock driving motor 40 through an IS pin, and the value thereof can be calculated through the voltage sampling value of the a/D sampling circuit.
Example 2:
as shown in fig. 13, the present invention further provides a method for detecting a state of a refueling door lock of a vehicle fuel tank, which uses the system for detecting a state of a refueling door lock of a vehicle fuel tank in embodiment 1, and with reference to fig. 4 to 12, the method includes the following steps:
acquiring a current signal of a refueling small door lock driving motor 40;
receiving a locking command or an unlocking command of the controller 20;
the current signal is combined with a locking instruction or an unlocking instruction to judge to obtain the working state of the small refueling door lock 50; wherein, operating condition includes: locked, unlocked and indeterminate states.
Specifically, the detection method provided in this embodiment can still effectively determine the working state of the small fuel filler door lock 50 in real time under the condition that it is ensured that no special lock position sensor is provided at present, and correctly detect the faults such as current invalidation of the small fuel filler door lock 50. Therefore, the present embodiment reduces the cost of the components of the fuel filling system, ensures that the fuel filling system can work normally, diagnoses the fault of the small refueling door lock 50 in time, and reduces the potential safety hazard to a certain extent.
As shown in fig. 13, according to another specific implementation manner of this embodiment, another specific implementation manner of this embodiment discloses a method for detecting a state of a refueling door lock of a vehicle fuel tank, where the method for determining a current signal to obtain an operating state of the refueling door lock includes:
preprocessing the current signal to obtain a processed signal:
the processing signal is in a preset calibration locked-rotor current range, and a locking instruction or an unlocking instruction is received, and the working state is judged to be locked or unlocked; wherein the content of the first and second substances,
if the processing signal is less than-400 mA and greater than-1800 mA, and an unlocking instruction is received, the unlocking state is determined;
if the processing signal is greater than 400mA and less than 1800mA, and a locking instruction is received, the locking state is judged;
the processing signal is outside the preset calibrated locked-rotor current range, and the locking instruction or the unlocking instruction is received, and the working state is determined to be an uncertain state, where the uncertain state includes idle running, loaded load, and short circuit, which may specifically refer to the description related to embodiment 1, and is not described herein again.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, taken in conjunction with the specific embodiments thereof, and that no limitation of the invention is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (12)
1. A detection system for the lock state of a small refueling door of a vehicle oil tank is characterized by comprising a lock state judgment unit, a controller, a driving chip and a small refueling door lock driving motor, wherein the driving chip is used for controlling the action of the small refueling door lock driving motor; wherein the content of the first and second substances,
the controller is in communication connection with the driving chip and is used for sending a locking or unlocking instruction to the small refueling door lock driving motor;
the driving chip is in communication connection with the lock state judging unit, acquires a current signal of the driving motor of the small accelerator lock and sends the current signal to the lock state judging unit;
and the lock state judgment unit receives the current signal and judges the working state of the small refueling door lock by combining a locking or instruction unlocking instruction.
2. The system for detecting the lock status of a fuel filler door of a vehicle fuel tank as set forth in claim 1, further comprising a nonvolatile memory communicatively connected to said lock status determining unit, said nonvolatile memory and said controller being communicatively connected to said lock status determining unit, respectively;
when the controller is powered off, the lock state judging unit stores the working state of the small refueling door lock into the nonvolatile memory;
when the controller is powered on, the lock state judgment unit reads the working state of the refueling small door lock from the nonvolatile memory.
3. A vehicle fuel tank refueling door lock condition detection system as set forth in claim 2 wherein said operational condition includes: locked, unlocked and indeterminate states.
4. A system for detecting the status of a refueling hatch of a vehicle fuel tank as claimed in claim 3, wherein the step of receiving the current signal and determining the operating status of the refueling hatch in combination with the locking command or the unlocking command by the locking status determining unit comprises the steps of:
preprocessing the current signal to obtain a processed signal:
the processing signal is within a preset calibration locked-rotor current range, and the working state is judged to be locked or unlocked after receiving the locking instruction or the unlocking instruction; wherein the content of the first and second substances,
if the processing signal is smaller than-400 mA and larger than-1800 mA, and the unlocking instruction is received, the unlocking state is determined;
if the processing signal is greater than 400mA and less than 1800mA, and the locking instruction is received, determining that the locking state is achieved;
and the processing signal is out of the preset calibration locked-rotor current range, and the working state is judged to be the uncertain state after receiving the locking instruction or the unlocking instruction, wherein the uncertain state comprises idle running, load carrying and short circuit.
5. A vehicle fuel tank filler door lock status detection system as claimed in claim 4, wherein said lock or unlock command is invalid or,
if the driving chip does not send the locking instruction or the unlocking instruction to the driving motor of the refueling small door lock,
and judging the processing signal to be in the uncertain state if the processing signal is greater than a preset calibration leakage current.
6. A vehicle fuel tank filler door lock status detection system as claimed in claim 5, further comprising a signal receiver disposed within said filler door lock drive motor; wherein, after the driving chip sends the locking instruction or the unlocking instruction to the small refueling door lock driving motor,
and if the signal receiver does not receive the locking instruction or the unlocking instruction, judging that the locking instruction or the unlocking instruction is invalid.
7. The system for detecting the status of a fuel door lock of a vehicle fuel tank of claim 4, wherein preprocessing the current signal to obtain the processed signal comprises:
and carrying out mean value filtering and debounce processing on the current signal.
8. A vehicle fuel tank filler door lock status detection system as claimed in any one of claims 4 to 7, wherein said detection system further comprises:
the timing unit is in communication connection with the driving chip, the driving chip acquires the processing signal of the driving motor of the small accelerator lock and sends the processing signal to the timing unit, and the timing unit is used for measuring the adjustment time required by the processing signal from 0 to the preset calibration locked rotor current range;
if the adjusting time is more than or equal to a calibration value, judging that the lock tongue of the small refueling door lock is not blocked;
if the adjusting time is less than the calibration value, judging that the lock tongue of the small refueling door lock is blocked for a single time; wherein the content of the first and second substances,
when the accumulated times of the single clamping stagnation times reach a calibration value of the clamping stagnation times, the clamping stagnation fault of the lock tongue of the small refueling door lock is judged;
wherein the calibration value is between 8 and 16 ms; the calibration value of the times of clamping stagnation is 3 times.
9. The system for detecting the status of a fuel door lock in a vehicle fuel tank of claim 8,
the detection system further comprises:
the lock tongue jamming counter, the lock tongue jamming counter with timing unit communication connection, the timing unit judges when the lock tongue that refuels little lock door takes place the single jamming will the single jamming is sent for the lock tongue jamming counter, the lock tongue jamming counter is received the single jamming and is counted, if the count is greater than 3 times, then judge to take place the jamming trouble.
10. The system for detecting the lock state of the small fuel filler door of the vehicle fuel tank as claimed in claim 1, wherein the system further comprises an external a/D sampling circuit in communication connection with the driving chip, and is configured to obtain a load current of the small fuel filler door lock motor, obtain the current signal according to the load current, and send the current signal to the lock state determining unit.
11. A method for detecting the state of a fuel filling door lock of a vehicle fuel tank, which is performed by using the system for detecting the state of a fuel filling door lock of a vehicle fuel tank according to any one of claims 1 to 10, the method comprising the steps of:
acquiring a current signal of the small refueling door lock driving motor;
receiving the locking instruction or the unlocking instruction of the controller;
judging the working state of the small refueling door lock according to the current signal and the locking instruction or the unlocking instruction; wherein the content of the first and second substances,
the working state comprises: locked, unlocked and indeterminate states.
12. A method for detecting the status of a refueling hatch of a vehicle fuel tank as set forth in claim 11, wherein the step of determining the current signal to obtain the refueling hatch comprises:
preprocessing the current signal to obtain a processed signal:
the processing signal is within a preset calibration locked-rotor current range, and the working state is judged to be locked or unlocked after receiving the locking instruction or the unlocking instruction; wherein the content of the first and second substances,
if the processing signal is smaller than-400 mA and larger than-1800 mA, and the unlocking instruction is received, the unlocking state is determined;
if the processing signal is greater than 400mA and less than 1800mA, and the locking instruction is received, determining that the locking state is achieved;
and the processing signal is out of the preset calibration locked-rotor current range, and the working state is judged to be the uncertain state after receiving the locking instruction or the unlocking instruction, wherein the uncertain state comprises idle running, load carrying and short circuit.
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| CN202010513781.XA CN113833368B (en) | 2020-06-08 | 2020-06-08 | System and method for detecting locking state of small refueling door of vehicle fuel tank |
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| CN202010513781.XA CN113833368B (en) | 2020-06-08 | 2020-06-08 | System and method for detecting locking state of small refueling door of vehicle fuel tank |
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| WO2024128919A1 (en) * | 2022-12-15 | 2024-06-20 | Mci (Mirror Controls International) Netherlands B.V. | Vehicle inlet port door actuation |
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