CN115257588B - Gear shifting actuator power supply protection method and device and electronic equipment - Google Patents
Gear shifting actuator power supply protection method and device and electronic equipment Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a power supply protection method and device for a gear shifting actuator and electronic equipment. Wherein the method comprises the following steps: acquiring an external power supply voltage signal for supplying power to a gear shifting actuator and a first reference voltage signal; step-down processing is carried out on the external power supply voltage signal to obtain a first acquisition voltage signal; verifying the first reference voltage signal by adopting a preset voltage signal to obtain a target reference voltage signal; processing the first acquisition voltage signal by adopting a target reference voltage signal to obtain a target acquisition voltage signal; determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal, wherein the protection strategy comprises any one of the following steps: and controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the execution of the gear shifting operation. The invention solves the technical problems of low reliability and low power supply protection efficiency in the collection process and further the risk of incapability of parking and sliding in the related technology.
Description
Technical Field
The invention relates to the technical field of power supply protection, in particular to a power supply protection method and device for a gear shifting actuator and electronic equipment.
Background
At present, a vehicle-mounted electronic device in an automobile often adopts a whole-automobile-level power supply protection system, a special power supply protection strategy is difficult to implement on a heavy-point device, and unexpected power supply interruption caused by power supply drift exists. In addition, due to the fact that the reference voltage is reliable by default in the related technology, a detected dead zone exists, the risk of errors in the voltage acquisition process is caused, the abnormal power supply cannot be detected in time, further the situation that the expected gear cannot be switched to is caused, the problem that the whole automobile cannot park or slide is caused, and potential safety hazards of the automobile are caused.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a power supply protection method and device for a gear shifting actuator and electronic equipment, and aims to at least solve the technical problems that in the related art, the reliability of a collection process is low, the power supply protection efficiency is low, and further parking cannot be achieved and the risk of sliding vehicles exists.
According to an aspect of the embodiment of the present invention, there is provided a power supply protection method for a gear shift actuator, including: acquiring an external power supply voltage signal for supplying power to a gear shifting actuator and a first reference voltage signal; step-down processing is carried out on the external power supply voltage signal to obtain a first acquisition voltage signal; verifying the first reference voltage signal by adopting a preset voltage signal to obtain a target reference voltage signal; processing the first acquisition voltage signal by adopting the target reference voltage signal to obtain a target acquisition voltage signal; determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal, wherein the protection strategy comprises any one of the following steps: and controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the execution of gear shifting operation.
Optionally, the verifying the first reference voltage signal with the preset voltage signal to obtain a target reference voltage signal includes: judging whether the difference value between the preset voltage signal and the first reference voltage signal exceeds a preset first preset difference value threshold value or not; and if the difference value between the preset voltage signal and the first reference voltage signal does not exceed the first preset difference value threshold value, taking the first reference voltage signal as the target reference voltage signal.
Optionally, if the difference between the preset voltage signal and the first reference voltage signal exceeds the first preset difference threshold, controlling to suspend the driving motor and sending a first alarm indication, wherein the driving motor is used for providing a driving signal of the gear shifting actuator.
Optionally, the determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal includes: judging whether the target acquisition voltage signal is in a preset voltage range or not; and if the target acquisition voltage signal is in the preset voltage range, controlling the gear shifting actuator to normally operate.
Optionally, if the target collected voltage signal is not in the preset voltage range, the determining the protection strategy for the gear shifting actuator according to the target collected voltage signal further includes: judging whether the target acquisition voltage signal is larger than the upper limit value of the preset voltage range or not; and if the target acquisition voltage signal is larger than the upper limit value of the preset voltage range, controlling the gear shifting actuator to pause the execution of the gear shifting operation, and sending out a second alarm indication.
Optionally, controlling the shift actuator to suspend performing a shift operation includes at least one of: controlling a pause driving motor, controlling and cutting off a relay corresponding to the gear shifting actuator, and determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal if the target acquisition voltage signal is not in the preset voltage range, wherein the gear shifting actuator further comprises: judging whether the target acquisition voltage signal is smaller than a first undervoltage threshold value or not, wherein the first undervoltage threshold value is smaller than the lower limit value of the preset voltage range; if the target acquisition voltage signal is smaller than the first undervoltage threshold, controlling to cut off the relay corresponding to the gear shifting actuator and stopping executing communication operation; and if the target acquisition voltage signal is between the first undervoltage threshold value and the lower limit value of the preset voltage range, controlling to pause the driving motor and sending out a third alarm indication.
Optionally, the determining the protection strategy for the gear shifting actuator according to the target collected voltage signal further includes: if the target acquisition voltage signal is not in the preset voltage range, acquiring a sampling period number of which the target acquisition voltage signal is not in the preset voltage range within a preset time length; judging whether the sampling cycle number exceeds a preset cycle number or not; and if the sampling cycle number exceeds the preset cycle number, controlling the gear shifting actuator to pause the execution of the gear shifting operation.
According to another aspect of the embodiment of the present invention, there is provided a gear shift actuator power supply protection device, including: the first acquisition module is used for acquiring an external power supply voltage signal for supplying power to the gear shifting actuator and a first reference voltage signal; the second acquisition module is used for carrying out step-down processing on the external power supply voltage signal to obtain a first acquisition voltage signal; the verification module is used for verifying the first reference voltage signal by adopting a preset voltage signal to obtain a target reference voltage signal; the third acquisition module is used for processing the first acquisition voltage signal by adopting the target reference voltage signal to obtain a target acquisition voltage signal; the determining module is used for determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal, wherein the protection strategy comprises any one of the following steps: and controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the execution of gear shifting operation.
According to another aspect of an embodiment of the present invention, there is provided a non-volatile storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform any one of the shift actuator power protection methods.
According to another aspect of an embodiment of the present invention, there is provided an electronic apparatus including: one or more processors and a memory for storing one or more programs, wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement any of the shift actuator power protection methods.
In the embodiment of the invention, an external power supply voltage signal for supplying power to a gear shifting actuator and a first reference voltage signal are obtained; step-down processing is carried out on the external power supply voltage signal to obtain a first acquisition voltage signal; verifying the first reference voltage signal by adopting a preset voltage signal to obtain a target reference voltage signal; processing the first acquisition voltage signal by adopting the target reference voltage signal to obtain a target acquisition voltage signal; determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal, wherein the protection strategy comprises any one of the following steps: and controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the execution of gear shifting operation. The method achieves the purposes of acquiring signals based on reliable reference voltage after verification and improving reliability and then improving power supply protection effect, achieves the technical effects of improving reliability of an acquisition process and improving power supply protection effect and reducing parking failure risk, and further solves the technical problems that the acquisition process is low in reliability and low in power supply protection efficiency and further incapable of parking and sliding risks in related technologies.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a flow chart of a shift actuator power protection method provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a shift actuator power protection method provided in accordance with an embodiment of the present invention;
fig. 3 is a schematic diagram of a protection strategy of a power supply protection method for a gear shifting actuator according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of voltage fluctuations of a shift actuator power protection method provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of a shift actuator power protection device provided in accordance with an embodiment of the present invention;
fig. 6 is a schematic diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the related art, the functional safety of the automobile is affected because the automobile can not be switched to the expected gear, and the automobile can possibly have collision accidents under the condition that the automobile can not be parked or is in sliding. In practical applications, the shift problem causes large-area recall of automobile manufacturers, resulting in great economic loss, and also negatively affects brand evaluation of the automobile manufacturers. The normal operation of the gear shifting actuator in the automobile has an important effect on the functional safety.
According to an embodiment of the present invention, there is provided a method embodiment of a shift actuator power supply protection method, it being noted that the steps illustrated in the flowchart of the figures may be performed in a computer system, such as a set of computer executable instructions, and that although a logical sequence is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in a different order than that illustrated herein.
Fig. 1 is a method for protecting power supply of a gear shift actuator according to an embodiment of the present invention, as shown in fig. 1, the method includes the steps of:
step S102, obtaining an external power supply voltage signal for supplying power to a gear shifting actuator and a first reference voltage signal;
Step S104, performing step-down processing on the external power supply voltage signal to obtain a first acquisition voltage signal;
Step S106, checking the first reference voltage signal by adopting a preset voltage signal to obtain a target reference voltage signal;
step S108, processing the first acquisition voltage signal by adopting the target reference voltage signal to obtain a target acquisition voltage signal;
Step S110, determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal, wherein the protection strategy comprises any one of the following steps: and controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the gear shifting operation.
Through the steps, the acquisition signal based on the credible reference voltage after verification can be obtained, the purpose of improving the reliability and further improving the power supply protection effect is achieved, the reliability of the acquisition process is improved, the power supply protection effect is improved, the technical effect of parking failure risk is reduced, and the technical problems that the acquisition process is low in reliability and low in power supply protection efficiency in the related art, and further the parking failure risk and the sliding risk cannot be achieved are solved.
In the power supply protection method for the gear shifting actuator provided by the embodiment of the invention, firstly, a voltage signal of external power supply is obtained to power the gear shifting actuator, and a first reference voltage signal is obtained. Because the external power supply voltage signal is used for supplying power, the voltage is generally higher, and the method is not suitable for processing the first reference voltage signal, and the first acquisition voltage signal is obtained after the external power supply voltage signal is subjected to step-down processing. The target acquisition voltage signal is closely related to the first reference voltage signal, whether the first reference voltage is credible needs to be verified in order to acquire a credible acquisition result, and the first reference voltage is verified by adopting a preset voltage signal to determine to acquire the target reference voltage signal. And processing the first acquisition voltage signal by using the target reference voltage signal to obtain a target acquisition voltage signal. And then, determining a protection strategy of the gear shifting actuator according to the obtained target acquisition voltage signal, and controlling the gear shifting actuator to normally operate according to the protection strategy or stopping executing the gear shifting operation when the gear shifting is executed, so as to keep the current gear state. In the related art, the first reference voltage signal is often default to be reliable, and a detection blind area exists, and because the target acquisition voltage signal is obtained based on the first reference voltage signal, the target acquisition voltage signal is directly unreliable due to the fact that the first reference voltage signal is unreliable. According to the method, the first reference voltage signal is checked, the reliability of the target acquisition voltage signal is improved, the protection strategy of the gear shifting actuator is effectively implemented, the situation that the gear shifting actuator cannot work normally due to unexpected power failure is reduced, the problem that a whole vehicle slides and cannot park due to device-level problems is prevented, and the functional safety of the vehicle is improved.
Alternatively, the first reference voltage signal may be various, for example, the first reference voltage signal is an electrical signal sent in real time by other electronic controllers in the automobile, or an electrical signal preset in the automobile, etc.
Optionally, the above-mentioned step-down processing may be performed in various manners, for example, in order to obtain the collected voltage signal of the external power supply voltage signal, an analog-to-digital converter is generally used to perform the function, where the normal range of the external power supply voltage signal of most gear shifting actuators is 9-16V, for example, 16V is selected as the external power supply voltage signal, and the commonly used reference voltage has a lower selected value, for example, 5V is selected as the first reference voltage signal. The 16V external supply voltage signal needs to be reduced below the 5V reference voltage to be used as input for processing by the usual analog-to-digital converter.
Optionally, the processing of the first collected voltage signal by using the target reference voltage signal may be in various manners, for example: the target reference voltage signal is a trusted signal which passes verification, and the analog-to-digital converter and the target reference signal are used for converting the first acquisition voltage signal from an analog signal to a usable digital signal as the target acquisition voltage signal.
It should be noted that, after the external power supply voltage signal enters the gear shifting actuator, the voltage range of the external power supply voltage signal needs to be monitored, and the external power supply voltage signal needs to be collected, so that in order to obtain a reliable collection result, a reliable reference voltage value needs to be introduced. The acquired voltage result is closely related to the reference voltage value. Due to the adoption of the semiconductor materials in hardware, common error phenomena such as temperature drift or zero drift are easy to occur, once voltage drift occurs in the reference voltage, the acquisition result is unreliable, and the verification step of the first reference voltage signal is added, so that the situation that the protection strategy of the gear shifting actuator cannot exert due effects due to error accumulation can be effectively reduced.
In an alternative embodiment, the verifying the first reference voltage signal with the preset voltage signal to obtain the target reference voltage signal includes: judging whether the difference value between the preset voltage signal and the first reference voltage signal exceeds a preset first preset difference value threshold value or not; and if the difference value between the preset voltage signal and the first reference voltage signal does not exceed the first preset difference value threshold value, the first reference voltage signal is used as the target reference voltage signal.
It will be appreciated that, in order to determine whether the first reference voltage signal is reliable, the preset voltage signal is adopted to perform verification, first, a difference between the preset voltage signal and the first reference voltage signal is determined to exceed a preset first preset difference threshold value by taking the reliable preset voltage signal as a reference, and if the difference does not exceed the preset first preset difference threshold value, the first reference voltage signal is considered to be reliable, and the first reference voltage signal is taken as the target reference voltage signal.
Alternatively, the preset voltage signal may be various, for example, a reliable constant-voltage power supply signal set for the interior of the automobile, and so on.
Optionally, the above-mentioned determination method for determining whether the difference between the preset voltage signal and the first reference voltage signal exceeds the preset first preset difference threshold may be various, for example: and comparing the first reference voltage signal with the preset voltage signal by adopting a voltage comparator or a voltage comparison circuit, and outputting an electric signal as a judgment result.
In an alternative embodiment, if the difference between the preset voltage signal and the first reference voltage signal exceeds the first preset difference threshold, the driving motor is controlled to be suspended and a first alarm indication is sent, wherein the driving motor is used for providing the driving signal of the gear shifting actuator.
It will be appreciated that in order to determine whether the first reference voltage signal is reliable, the preset voltage signal is used for verification, if a difference between the preset voltage signal and the first reference voltage signal exceeds the first preset difference threshold, the first reference voltage signal is considered to be unreliable, a driving motor in a gear shifting actuator is controlled to suspend operation, the driving motor is suspended to provide a driving signal for the gear shifting actuator, the gear shifting actuator keeps a current state, and a first alarm indication is sent to prompt that the gear shifting operation is suspended due to the fact that the first reference voltage signal is unreliable.
Optionally, the driving motor provides the driving signal in various manners, for example: the driving motor sends a driving signal to a gear shifting executing motor of the gear shifting actuator, and gear shifting operation is executed through the gear shifting executing motor.
In an alternative embodiment, the determining a protection strategy for the shift actuator according to the target collected voltage signal includes: judging whether the target acquisition voltage signal is in a preset voltage range or not; and if the target acquisition voltage signal is in the preset voltage range, controlling the gear shifting actuator to normally operate.
It will be appreciated that the protection strategy for the shift actuator described above is determined after the actual target acquisition voltage signal is authentic. The target acquisition voltage signal corresponds to a preset voltage range of normal operation, firstly, whether the target acquisition voltage signal is in the preset voltage range is judged, if the target acquisition voltage signal is in the preset voltage range, the target acquisition voltage signal is regarded as the normal external power supply voltage signal, and the gear shifting actuator is controlled to normally operate.
It should be noted that, the normal operation of the above gear shifting actuator means that the gear shifting operation can be performed according to the specific requirement of the driver, for example: the gear shifting is performed or not based on subjective requirements of a driver, and the gear shifting actuator belongs to the normal operation range of the gear shifting actuator.
In an alternative embodiment, if the target collected voltage signal is not in the preset voltage range, the determining the protection strategy for the gear shifting actuator according to the target collected voltage signal further includes: judging whether the target acquisition voltage signal is larger than the upper limit value of the preset voltage range or not; and if the target acquisition voltage signal is larger than the upper limit value of the preset voltage range, controlling the gear shifting actuator to pause the execution of the gear shifting operation, and sending a second alarm indication.
It can be understood that the target collected voltage signal corresponds to a preset voltage range of normal operation, and when the target collected voltage signal is greater than the upper limit value of the preset voltage range, an overvoltage problem occurs as an external power supply voltage value, the gear shifting actuator is controlled to suspend execution of gear shifting operation, and a second alarm indication is sent.
Alternatively, the control of the shift actuator to suspend the execution of the shift operation may be various, for example, a control of the drive motor to suspend the execution of the shift operation by the shift actuator may be employed.
It should be noted that, when the target acquisition voltage signal is greater than the upper limit value of the preset voltage range, the external power supply voltage signal has the capability of providing the energy required by the shift actuator to suspend the execution of the shift operation, and the suspension of the execution of the shift operation may be various, for example: suspending the drive motor, shutting off the corresponding loop relay, or simultaneously performing operations of suspending the drive motor and shutting off the corresponding loop relay, and so forth.
In an alternative embodiment, controlling the shift actuator to suspend execution of the shift operation includes at least one of: controlling a pause driving motor, controlling and cutting off a relay corresponding to the gear shifting actuator, and determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal if the target acquisition voltage signal is not in the preset voltage range, wherein the gear shifting actuator further comprises: judging whether the target acquisition voltage signal is smaller than a first undervoltage threshold value or not, wherein the first undervoltage threshold value is smaller than the lower limit value of the preset voltage range; if the target acquisition voltage signal is smaller than the first undervoltage threshold, controlling to cut off the relay corresponding to the gear shifting actuator and stopping executing communication operation; and if the target acquisition voltage signal is between the first undervoltage threshold value and the lower limit value of the preset voltage range, controlling to pause the driving motor and sending out a third alarm indication.
It will be appreciated that to control the shift actuator described above to suspend performing a shift operation may include at least one of: and controlling the pause driving motor and controlling to cut off a relay corresponding to the gear shifting actuator. The target acquisition voltage signal corresponds to a preset voltage range of normal operation, the condition that the target acquisition voltage signal deviates from the preset voltage range exists, and under-voltage conditions and over-voltage and under-voltage conditions also exist when the target acquisition voltage signal is larger than the lower limit value of the preset voltage range. And if the target acquisition voltage signal is smaller than the first undervoltage threshold, the target acquisition voltage signal is considered to be in an undervoltage condition, the relay corresponding to the gear shifting actuator is controlled to be cut off, and communication operation is stopped. And if the target acquisition voltage signal is between the first undervoltage threshold value and the lower limit value of the preset voltage range, the target acquisition voltage signal is considered to be in an undervoltage condition, the driving motor is controlled to be suspended, and a third alarm indication is sent out.
Alternatively, the relay may be various, and a switching device such as a contactor, which is characterized as being controlled by an electrical signal and has a switching function of being turned off/on, is also within the scope of protection.
Alternatively, the connection relationship between the driving motor and the relay may be various, for example: the relay is positioned between the driving motor and the gear shifting executing motor.
It should be noted that, when the target acquisition voltage signal is smaller than the first undervoltage threshold, the external power supply voltage signal is in an overvoltage and undervoltage condition, and there may be a situation that the driving motor cannot be suspended, or a situation that an alarm indication cannot be sent. In order to avoid the problem that a large number of errors are reported because the driving motor still running is continuously communicated with other controls in the vehicle due to incapability of suspending the driving motor, the communication operation is required to be stopped under the condition that the target acquisition voltage signal is smaller than the first undervoltage threshold value.
In an alternative embodiment, the determining the protection strategy for the gear shifting actuator according to the target collected voltage signal further includes: if the target acquisition voltage signal is not in the preset voltage range, acquiring a sampling period number of which the target acquisition voltage signal is not in the preset voltage range within a preset time length; judging whether the sampling cycle number exceeds a preset cycle number or not; and if the sampling cycle number exceeds the preset cycle number, controlling the gear shifting actuator to pause the execution of the gear shifting operation.
It can be appreciated that in order to avoid frequent triggering of the protection strategy of the shift actuator due to fluctuation of the external power supply voltage signal, the shift actuator is stopped, whether the fault actually occurs is comprehensively determined by combining the sampling period, and the robustness of the protection strategy is enhanced. Firstly, when the target acquisition voltage signal is not in a preset voltage range, acquiring a sampling period number of which the target acquisition voltage signal is not in the preset voltage range within a preset time. Sampling is performed within a preset period until the number of cycles exceeding the voltage range reaches the preset number of cycles, so that the target acquisition voltage signal is not in the preset voltage range due to accidental voltage fluctuation, but is considered to be actually problematic. And then judging whether the sampling cycle number exceeds a preset cycle number, and if the sampling cycle number exceeds the preset cycle number, controlling the gear shifting actuator to pause the execution of the gear shifting operation. The method ensures that the protection strategy has certain fault tolerance, avoids frequent false triggering protection, and is beneficial to improving the drivability and the power supply protection efficiency.
Based on the foregoing embodiments and optional embodiments, an optional implementation manner is provided in the present invention, and for convenience of understanding, the present invention is applied to an intelligent gear shifting actuator for specific examples. For example: fig. 2 is a schematic diagram of a power supply protection method for a gear shifting actuator according to an embodiment of the present invention, as shown in fig. 2, a power supply voltage of an intelligent gear shifting actuator is input from the outside, and after the power supply voltage is collected and input to a main control unit of the intelligent gear shifting actuator, a corresponding operation is performed according to a protection strategy. After the external power supply is input into the intelligent gear shifting actuator, the voltage range of the intelligent gear shifting actuator needs to be monitored, so that one path of power supply voltage is introduced for measurement. An analog-to-digital converter is generally adopted for acquisition, but the acquisition value is closely related to the reference voltage of the analog-to-digital converter, so that the reference voltage of the analog-to-digital converter is independently verified. The reference voltage is usually 5V constant. The normal range of the external power supply voltage of the intelligent gear shifting actuator is 9-16V, and the acquired voltage is required to be reduced below the reference voltage by a voltage acquisition circuit so as to be input into the analog-to-digital converter. In the analog-to-digital converter, the acquired voltage is converted from analog quantity to digital quantity, and the digital quantity is output for voltage range detection. Fig. 3 is a schematic diagram of a protection strategy of a power supply protection method for a gear shifting actuator according to an embodiment of the present invention. As shown in fig. 3, the voltage range of the collected power supply voltage is detected, and in order to ensure the reliability of the voltage range detection result, the reference voltage of the power supply voltage collection module in the intelligent gear shifting actuator is collected and checked. Once the reference voltage drifts, the detection result is not trusted. The voltage comparison circuit is thus designed for verification. The core of the voltage comparison circuit is a voltage comparator which compares the reference voltage with the independent power supply in the other circuit, and when the difference between the reference voltage and the independent power supply exceeds a set value, the reference voltage checking result is unreliable. At the moment, the driver is reminded of the failure of the intelligent gear shifting actuator, and the driving motor is stopped. After the verification is passed, judging the power supply voltage range: when the voltage range is normal, the function is normally executed; when the motor is in overvoltage or undervoltage, the motor is stopped to send out alarm signals, and the overvoltage and undervoltage thresholds can be set; when the voltage exceeds or is low, the control of the drive stopping motor or the sending of an alarm signal can not be completed, but the relay can be cut off due to insufficient power supply, and external communication is cut off.
In addition, periodic sampling and comparison is also required. In order to ensure that the power supply fault is detected within a fault tolerance time interval (preset value) and timely response is adopted according to a protection strategy, a sampling period is marked as T, and the requirement of the fault detection time interval is met. If the requirement is set to meet the fault detection time interval of more than or equal to 3T-5T, the robustness of the detection result is ensured. And comparing the trusted target sampling voltage signal serving as a power supply detection result with a threshold value of normal power supply. When the upper and lower thresholds are exceeded, but not for a certain period of time, the voltage is considered to be normal and the safety state should not be triggered. Fig. 4 is a schematic diagram of a gear shifting actuator power supply protection device provided according to an embodiment of the present invention. As shown in fig. 4, the voltage between 1T and 2T is considered to be normal voltage fluctuation, and no further processing is required; and the overvoltage is judged to occur between 3T and 4T, and corresponding control response is needed to be adopted according to a protection strategy.
The invention provides an optional implementation mode, which comprises the following specific steps:
step S1, obtaining an externally supplied voltage signal to supply power to a gear shifting actuator, and obtaining a first reference voltage signal.
In step S2, the voltage of the external power supply voltage signal is generally higher, which is not suitable for processing the first reference voltage signal, and the first collected voltage signal is obtained after the step-down processing is performed on the external power supply voltage signal.
Optionally, in order to obtain the collected voltage signal of the external power supply voltage signal, an analog-to-digital converter is generally used to perform the function, 16V is selected as the external power supply voltage signal, and the first reference voltage signal is selected to be 5V. The 16V external supply voltage signal is reduced below the 5V reference voltage before being used as input for processing by the usual analog-to-digital converter.
Step S3, the target acquisition voltage signal is closely related to the first reference voltage signal, whether the first reference voltage is credible needs to be verified in order to obtain a credible result, and a preset voltage signal is adopted to verify the first reference voltage, so that the target reference voltage signal is obtained.
In step S31, in order to determine whether the first reference voltage signal is reliable, a preset voltage signal is adopted for verification, if the difference between the preset voltage signal and the first reference voltage signal exceeds a first preset difference threshold, the first reference voltage signal is considered to be unreliable, a driving motor in a gear shifting actuator is controlled to suspend operation, the driving motor is suspended to provide a driving signal for the gear shifting actuator, the gear shifting actuator keeps a current state, and a first alarm indication is sent to prompt that the gear shifting operation is suspended due to the fact that the first reference voltage signal is unreliable.
And S4, processing the first acquisition voltage signal by using the target reference voltage signal to obtain a target acquisition voltage signal. The target reference voltage signal is a trusted signal which passes verification, and the analog-to-digital converter and the target reference signal are used for converting the first acquisition voltage signal into a usable digital signal from an analog signal as the target acquisition voltage signal.
And S5, determining a protection strategy of the gear shifting actuator according to the obtained target acquisition voltage signal, controlling the gear shifting actuator to normally operate or controlling the gear shifting actuator to pause the execution of the gear shifting operation when the gear shifting is executed, and keeping the current gear state. Specifically, one of the following sub-steps may be adopted:
Step S51, the target collected voltage signal corresponds to a preset voltage range of normal operation, and first, it is determined whether the target collected voltage signal is in the preset voltage range, if the target collected voltage signal is within the preset voltage range, the external power supply voltage signal is considered normal, and the shift actuator is controlled to operate normally.
Step S52, when the target collected voltage signal is greater than the upper limit value of the preset voltage range, the target collected voltage signal is regarded as an overvoltage problem of the external power supply voltage value, and the shift actuator is controlled to suspend the execution of the shift operation and to issue a second alarm indication.
Step S53, when the target collected voltage signal is greater than the lower limit value of the preset voltage range, an under-voltage condition and an over-voltage condition exist. And if the target acquisition voltage signal is smaller than the first undervoltage threshold, the target acquisition voltage signal is considered to be in an undervoltage condition, the relay corresponding to the gear shifting actuator is controlled to be cut off, and communication operation is stopped. And if the target acquisition voltage signal is between the first undervoltage threshold value and the lower limit value of the preset voltage range, the target acquisition voltage signal is considered to be in an undervoltage condition, the driving motor is controlled to be suspended, and a third alarm indication is sent out.
At least any one of the following technical effects may be achieved by the above-described alternative embodiments: 1. the power supply protection is carried out on the independent controller (gear shifting actuator), the verification of the reference voltage is newly added on the basis of the detection of the power supply voltage, and the reliability of the power supply voltage acquisition result of the gear shifting actuator is improved. 2. The relay is positioned between the driving motor and the gear shifting executing motor, the on-off of the loop is controlled, and the timeliness and reliability of cutting off the driving motor are ensured. 3. Besides the whole-vehicle-level power supply protection system, the special power supply protection strategy implemented by the key protection controller, namely the gear shifting actuator is independent of the functional safety design of the whole vehicle, and has independence and integrity, so that the whole-vehicle power supply system is supplemented with the functional safety design of the whole vehicle, and the multi-layer power supply safety guarantee is realized from the whole-vehicle level to the specific controller level.
It should be noted that, adopting above-mentioned optional implementation mode, can avoiding the unable parking risk that the single point of shifting executor power supply became invalid and lead to, can play the effect that promotes functional safety to whole car operation through above-mentioned protection strategy, avoid because unable parking or swift current car cause traffic accident or personal safety hidden danger, played good promotion effect to promoting car security and drivability.
It should also be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
In this embodiment, a power supply protection device for a gear shifting actuator is further provided, and the device is used to implement the foregoing embodiments and preferred embodiments, and is not described again. As used below, the terms "module," "apparatus" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
According to an embodiment of the present invention, there is further provided an apparatus embodiment for implementing a power supply protection method for a shift actuator, and fig. 5 is a schematic diagram of a power supply protection apparatus for a shift actuator according to an embodiment of the present invention, as shown in fig. 5, where the power supply protection apparatus for a shift actuator includes: the first obtaining module 402, the second obtaining module 404, the checking module 406, the third obtaining module 408, and the determining module 410 are described below.
A first acquisition module 402, configured to acquire an external power supply voltage signal for powering the shift actuator, and a first reference voltage signal;
The second acquisition module 404 is connected to the first acquisition module 402, and is configured to perform a step-down process on the external power supply voltage signal to obtain a first acquired voltage signal;
The verification module 406 is connected to the second obtaining module 404, and is configured to verify the first reference voltage signal by using a preset voltage signal to obtain a target reference voltage signal;
a third obtaining module 408, connected to the verification module 406, for processing the first collected voltage signal by using the target reference voltage signal to obtain a target collected voltage signal;
The determining module 410 is connected to the third obtaining module 408, and configured to determine a protection policy for the shift actuator according to the target collected voltage signal, where the protection policy includes any one of the following: and controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the gear shifting operation.
In the power supply protection device for the gear shifting actuator provided by the embodiment of the invention, the first acquisition module 402 is used for acquiring an external power supply voltage signal for supplying power to the gear shifting actuator and a first reference voltage signal; the second acquisition module 404 is connected to the first acquisition module 402, and is configured to perform a step-down process on the external power supply voltage signal to obtain a first acquired voltage signal; the verification module 406 is connected to the second obtaining module 404, and is configured to verify the first reference voltage signal by using a preset voltage signal to obtain a target reference voltage signal; a third obtaining module 408, connected to the verification module 406, for processing the first collected voltage signal by using the target reference voltage signal to obtain a target collected voltage signal; the determining module 410 is connected to the third obtaining module 408, and configured to determine a protection policy for the shift actuator according to the target collected voltage signal, where the protection policy includes any one of the following: and controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the gear shifting operation. The method achieves the purposes of acquiring signals based on reliable reference voltage after verification and improving reliability and then improving power supply protection effect, achieves the technical effects of improving reliability of an acquisition process and improving power supply protection effect and reducing parking failure risk, and further solves the technical problems that the acquisition process is low in reliability and low in power supply protection efficiency in related technologies and further incapable of parking and sliding risks.
It should be noted that each of the above modules may be implemented by software or hardware, for example, in the latter case, it may be implemented by: the above modules may be located in the same processor; or the various modules described above may be located in different processors in any combination.
It should be noted that, the first obtaining module 402, the second obtaining module 404, the verification module 406, and the third obtaining module 408 correspond to the steps S102 to S110 in the embodiment, and the above modules are the same as the examples and application scenarios implemented by the corresponding steps, but are not limited to the disclosure of the above embodiments. It should be noted that the above modules may be run in a computer terminal as part of the apparatus.
It should be noted that, the optional or preferred implementation manner of this embodiment may be referred to the related description in the embodiment, and will not be repeated herein.
The gear shifting actuator power supply protection device may further include a processor and a memory, where the first acquiring module 402, the second acquiring module 404, the checking module 406, the third acquiring module 408, the determining module 410, etc. are all stored as program units, and the processor executes the program units stored in the memory to implement corresponding functions.
The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The kernel may be provided with one or more. The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.
The embodiment of the invention provides a nonvolatile storage medium, and a program is stored on the nonvolatile storage medium, and the program realizes a power supply protection method of a gear shifting actuator when being executed by a processor.
As shown in fig. 6, an embodiment of the present invention provides an electronic device, where the electronic device 10 includes a processor, a memory, and a program stored on the memory and executable on the processor, and the processor implements the following steps when executing the program: acquiring an external power supply voltage signal for supplying power to a gear shifting actuator and a first reference voltage signal; step-down processing is carried out on the external power supply voltage signal to obtain a first acquisition voltage signal; verifying the first reference voltage signal by adopting a preset voltage signal to obtain a target reference voltage signal; processing the first acquisition voltage signal by adopting the target reference voltage signal to obtain a target acquisition voltage signal; determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal, wherein the protection strategy comprises any one of the following steps: and controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the gear shifting operation. The device herein may be a server, a PC, etc.
The invention also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with the method steps of: acquiring an external power supply voltage signal for supplying power to a gear shifting actuator and a first reference voltage signal; step-down processing is carried out on the external power supply voltage signal to obtain a first acquisition voltage signal; verifying the first reference voltage signal by adopting a preset voltage signal to obtain a target reference voltage signal; processing the first acquisition voltage signal by adopting the target reference voltage signal to obtain a target acquisition voltage signal; determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal, wherein the protection strategy comprises any one of the following steps: and controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the gear shifting operation.
Optionally, the above computer program product is further adapted to execute a program initialized with the method steps of: judging whether the difference value between the preset voltage signal and the first reference voltage signal exceeds a preset first preset difference value threshold value or not; and if the difference value between the preset voltage signal and the first reference voltage signal does not exceed the first preset difference value threshold value, the first reference voltage signal is used as the target reference voltage signal.
Optionally, the above computer program product is further adapted to execute a program initialized with the method steps of: and if the difference value between the preset voltage signal and the first reference voltage signal exceeds the first preset difference value threshold value, controlling a pause driving motor and sending out a first alarm indication, wherein the driving motor is used for providing a driving signal of the gear shifting actuator.
Optionally, the above computer program product is further adapted to execute a program initialized with the method steps of: judging whether the target acquisition voltage signal is in a preset voltage range or not; and if the target acquisition voltage signal is in the preset voltage range, controlling the gear shifting actuator to normally operate.
Optionally, the above computer program product is further adapted to execute a program initialized with the method steps of: judging whether the target acquisition voltage signal is larger than the upper limit value of the preset voltage range or not; and if the target acquisition voltage signal is larger than the upper limit value of the preset voltage range, controlling the gear shifting actuator to pause the execution of the gear shifting operation, and sending a second alarm indication.
Optionally, the above computer program product is further adapted to execute a program initialized with the method steps of: judging whether the target acquisition voltage signal is smaller than a first undervoltage threshold value or not, wherein the first undervoltage threshold value is smaller than the lower limit value of the preset voltage range; if the target acquisition voltage signal is smaller than the first undervoltage threshold, controlling to cut off the relay corresponding to the gear shifting actuator and stopping executing communication operation; and if the target acquisition voltage signal is between the first undervoltage threshold value and the lower limit value of the preset voltage range, controlling to pause the driving motor and sending out a third alarm indication.
Optionally, the above computer program product is further adapted to execute a program initialized with the method steps of: if the target acquisition voltage signal is not in the preset voltage range, acquiring a sampling period number of which the target acquisition voltage signal is not in the preset voltage range within a preset time length; judging whether the sampling cycle number exceeds a preset cycle number or not; and if the sampling cycle number exceeds the preset cycle number, controlling the gear shifting actuator to pause the execution of the gear shifting operation.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are to be included in the scope of the claims of the present invention.
Claims (9)
1. A shift actuator power protection method, comprising:
Acquiring an external power supply voltage signal for supplying power to a gear shifting actuator and a first reference voltage signal;
Step-down processing is carried out on the external power supply voltage signal to obtain a first acquisition voltage signal;
Verifying the first reference voltage signal by adopting a preset voltage signal to obtain a target reference voltage signal;
Processing the first acquisition voltage signal by adopting the target reference voltage signal to obtain a target acquisition voltage signal;
Determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal, wherein the protection strategy comprises any one of the following steps: controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the gear shifting operation;
The step of verifying the first reference voltage signal by using a preset voltage signal to obtain a target reference voltage signal includes: judging whether the difference value between the preset voltage signal and the first reference voltage signal exceeds a preset first preset difference value threshold value or not; and if the difference value between the preset voltage signal and the first reference voltage signal does not exceed the first preset difference value threshold value, taking the first reference voltage signal as the target reference voltage signal.
2. The method of claim 1, wherein if a difference between the preset voltage signal and the first reference voltage signal exceeds the first preset difference threshold, controlling a pause drive motor and issuing a first warning indication, wherein the drive motor is configured to provide a drive signal for the shift actuator.
3. The method of claim 1, wherein the determining a protection strategy for the shift actuator based on the target acquisition voltage signal comprises:
Judging whether the target acquisition voltage signal is in a preset voltage range or not;
And if the target acquisition voltage signal is in the preset voltage range, controlling the gear shifting actuator to normally operate.
4. The method of claim 3, wherein if the target acquisition voltage signal is not within the preset voltage range, the determining a protection strategy for the shift actuator based on the target acquisition voltage signal further comprises:
Judging whether the target acquisition voltage signal is larger than the upper limit value of the preset voltage range or not;
and if the target acquisition voltage signal is larger than the upper limit value of the preset voltage range, controlling the gear shifting actuator to pause the execution of the gear shifting operation, and sending out a second alarm indication.
5. The method of claim 3, wherein controlling the shift actuator to suspend performing a shift operation comprises at least one of: controlling a pause driving motor, controlling and cutting off a relay corresponding to the gear shifting actuator, and determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal if the target acquisition voltage signal is not in the preset voltage range, wherein the gear shifting actuator further comprises:
judging whether the target acquisition voltage signal is smaller than a first undervoltage threshold value or not, wherein the first undervoltage threshold value is smaller than the lower limit value of the preset voltage range;
If the target acquisition voltage signal is smaller than the first undervoltage threshold, controlling to cut off the relay corresponding to the gear shifting actuator and stopping executing communication operation;
And if the target acquisition voltage signal is between the first undervoltage threshold value and the lower limit value of the preset voltage range, controlling to pause the driving motor and sending out a third alarm indication.
6. The method of claim 3, wherein the determining a protection strategy for the shift actuator based on the target acquisition voltage signal further comprises:
If the target acquisition voltage signal is not in the preset voltage range, acquiring a sampling period number of which the target acquisition voltage signal is not in the preset voltage range within a preset time length;
judging whether the sampling cycle number exceeds a preset cycle number or not;
and if the sampling cycle number exceeds the preset cycle number, controlling the gear shifting actuator to pause the execution of the gear shifting operation.
7. A shift actuator power protection device, comprising:
the first acquisition module is used for acquiring an external power supply voltage signal for supplying power to the gear shifting actuator and a first reference voltage signal;
the second acquisition module is used for carrying out step-down processing on the external power supply voltage signal to obtain a first acquisition voltage signal;
The verification module is used for verifying the first reference voltage signal by adopting a preset voltage signal to obtain a target reference voltage signal;
The third acquisition module is used for processing the first acquisition voltage signal by adopting the target reference voltage signal to obtain a target acquisition voltage signal;
The determining module is used for determining a protection strategy for the gear shifting actuator according to the target acquisition voltage signal, wherein the protection strategy comprises any one of the following steps: controlling the gear shifting actuator to normally operate, and controlling the gear shifting actuator to pause the gear shifting operation;
Wherein, the verification module is further used for: judging whether the difference value between the preset voltage signal and the first reference voltage signal exceeds a preset first preset difference value threshold value or not; and if the difference value between the preset voltage signal and the first reference voltage signal does not exceed the first preset difference value threshold value, taking the first reference voltage signal as the target reference voltage signal.
8. A non-volatile storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the shift actuator power protection method of any one of claims 1 to 6.
9. An electronic device, comprising: one or more processors and memory for storing one or more programs, wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the shift actuator power protection method of any of claims 1-6.
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| WO2019059361A1 (en) * | 2017-09-22 | 2019-03-28 | 株式会社デンソー | Vehicle power supply system and power supply control device |
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