CN110824901A - Detection circuit, method, system and storage medium for P-gear key - Google Patents
Detection circuit, method, system and storage medium for P-gear key Download PDFInfo
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- CN110824901A CN110824901A CN201911038657.6A CN201911038657A CN110824901A CN 110824901 A CN110824901 A CN 110824901A CN 201911038657 A CN201911038657 A CN 201911038657A CN 110824901 A CN110824901 A CN 110824901A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000002184 metal Substances 0.000 claims description 2
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- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B9/00—Safety arrangements
- G05B9/02—Safety arrangements electric
- G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems
Abstract
The invention discloses a detection circuit, a method and a system for a P-gear key and a storage medium. This detection circuitry of P shelves button includes: the device comprises a first contact key, a second contact key, a third contact key, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor, wherein the first contact key and the first resistor are connected in series to form a first branch circuit, the second contact key and the second resistor are connected in series to form a second branch circuit, the third contact key and the third resistor are connected in series to form a third branch circuit, the fourth resistor, the first branch circuit, the second branch circuit and the third branch circuit are connected in parallel, and the voltage at two ends of the third contact key is output voltage so as to detect the state of the P-gear key according to the output voltage. According to the technical scheme of the embodiment of the invention, the detection of the state of the P-gear key is realized, the fault state of the P-gear key can be effectively identified, and the working safety of the electronic gear shifting system is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicle control, in particular to a detection circuit, a method, a system and a storage medium for a P-gear key.
Background
Traditional gear shift system when parking by other gears, mostly need stir the rocker, drives the gear shift wire drawing and reachs P shelves, connects through driver pulling promptly, connects and transmits power for the parking pawl, and the main gear that subtracts of gearbox is gone into to buckle structure card on the parking pawl, finally plays the purpose of pinning whole gearbox. The handle P gear button of the electronic gear shifting system can simplify the process into the process of driving the motor to realize P gear parking through signals, and the whole process is more labor-saving and simple.
The P-gear button on the electronic gear shifting handle conveys the parking intention of a driver to an input port of the whole vehicle, and the state of the P-gear button determines the state of the whole vehicle and the driving safety to a certain extent. Whether the P-range key state is normally detected and communicated represents the quality of the shift handle to some extent.
Disclosure of Invention
The invention provides a detection circuit, a detection method, a detection system and a storage medium of a P-gear key, which are used for realizing the state detection of the P-gear key and improving the safety level of a gear shifting system.
In a first aspect, an embodiment of the present invention provides a P-range key detection circuit, where the circuit includes: the device comprises a first contact key, a second contact key, a third contact key, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor, wherein the first contact key and the first resistor are connected in series to form a first branch circuit, the second contact key and the second resistor are connected in series to form a second branch circuit, the third contact key and the third resistor are connected in series to form a third branch circuit, the fourth resistor, the first branch circuit, the second branch circuit and the third branch circuit are connected in parallel, one end of the first branch circuit, one end of the second branch circuit and one end of the third branch circuit are connected with an input voltage, one end of the first branch circuit, one end of the second branch circuit and one end of the third branch circuit are connected with the fifth resistor in series and then are grounded, and the voltages at two ends of the third contact key are output voltages to detect the state of the P-.
In a second aspect, an embodiment of the present invention further provides a method for detecting a P-range key, where the method for detecting a P-range key is used in a detection circuit of a P-range key provided in any embodiment of the present invention, and the method includes:
detecting the output voltage of a detection circuit of the P-gear key;
and determining the state of the P-gear key according to the value of the output voltage.
In a third aspect, embodiments of the present invention further provide an electronic shift system, including: the P-gear button (including the detection circuit of the P-gear button provided by any embodiment of the invention), a gear shifting handle, an electronic gear shifter, a gear shifting controller and a gear shifting actuator.
In a fourth aspect, the present invention further provides a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform the method for detecting a P-range key provided in any embodiment of the present invention.
According to the technical scheme of the embodiment of the invention, the redundant design of P-gear key detection is formed by arranging the three contact keys in parallel and combining the states of the keys, the circuit is easy to install, the whole vehicle does not need to be disassembled, and the application range is wide; the fault state of the P-gear key can be effectively identified, and the working safety of the electronic gear shifting system is improved.
Drawings
Fig. 1 is a schematic structural diagram of a detection circuit of a P-range key according to a first embodiment of the present invention;
FIG. 2 is a flowchart of a circuit method for detecting a P-range key according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a detection circuit device of a P-range key according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic shift system according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.
Example one
Fig. 1 is a schematic structural diagram of a P-shift key detection circuit according to an embodiment of the present invention, as shown in fig. 1, the P-shift key detection circuit includes: a first contact key K1, a second contact key K2, a third contact key K3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5.
Wherein, first contact button K1 with first resistance R1 establishes ties and constitutes first branch, second contact button K2 with second resistance R2 establishes ties and constitutes the second branch, third contact button K3 with third resistance R3 establishes ties and constitutes the third branch, fourth resistance R4, first branch, second branch and third branch are parallelly connected each other, the one end of first branch, second branch and third branch connects input voltage VCC, one end with ground connection behind the fifth resistance series connection R5, the voltage at third contact button K3 both ends is output voltage V5OAnd detecting the state of the P-gear key according to the output voltage.
The P-range key is a key for expressing the parking intention of the driver in the electronic gear shifting system, and the vehicle can be parked by pressing the P-range key. Traditional gear shift system when parking by other gears, mostly need stir the rocker, drives the gear shift wire drawing and reachs P shelves, connects through driver pulling promptly, connects and transmits power for the parking pawl, and the main gear that subtracts of gearbox is gone into to buckle structure card on the parking pawl, finally plays the purpose of pinning whole gearbox. The handle P gear button of the electronic gear shifting system can simplify the process into the process of driving the motor to realize P gear parking through signals, and the whole process is more labor-saving and simple.
Further, the first contact key K1 and the second contact key K2 are silicone keys.
Further, the third contact key K3 is a metal touch key.
Optionally, the first contact key K1 and the second contact key K2 are disposed at one side of the P-stage key at preset intervals, and the third contact key K3 is disposed at the other side of the P-stage key.
By arranging the three parallel contact buttons, the value of the output voltage can be correspondingly changed according to different states of the three buttons, so that the state of the P-gear button can be determined according to the output voltage. Specifically, the three contact buttons are arranged at different positions of the P-gear button, so that at least two contact buttons are connected when the P-gear button is pressed down.
Specifically, the positions of the first, second, and third contact keys K1, K2, and K3 may be set according to pressing habits of a user. The first and second contact keys K1 and K2 may be disposed at positions where the user is accustomed to pressing, and the third contact key K3 may be disposed at a side away from the first and second contact keys K1 and K2.
For example, the first, second and third contact keys K1, K2 and K3 may be placed on a circuit board under the key case of the P-range key, with the first and second contact keys K1 and K2 placed on one side of the circuit board and the third contact key K3 placed on the other side of the circuit board. Wherein one sides of the first and second contact buttons K1 and K2 are sides that the user is accustomed to pressing.
This has the advantage that it is ensured that at least two contact keys are engaged when the P-range key is pressed or engaged. Therefore, the state of the P-stage key corresponding to the threshold interval C1 of the output voltage corresponding to the on state or the pressed state of at least two contact buttons of the detection circuit may be set to the off state or the non-pressed state, and the state of the P-stage key corresponding to the threshold interval C2 of the output voltage corresponding to the off state of at least two contact buttons may be specifically set as shown in table 1.
TABLE 1 correspondence between button status and P-shift button status
| K1 | K2 | K3 | P-gear key |
| Disconnect | Disconnect | Disconnect | Disconnect |
| Disconnect | Disconnect | Is connected to | Disconnect |
| Disconnect | Is connected to | Disconnect | Disconnect |
| Disconnect | Is connected to | Is connected to | Is connected to |
| Is connected to | Disconnect | Disconnect | Disconnect |
| Is connected to | Disconnect | Is connected to | Is connected to |
| Is connected to | Is connected to | Disconnect | Is connected to |
| Is connected to | Is connected to | Is connected to | Is connected to |
When the output voltage of the detection circuit does not belong to the two threshold ranges (the threshold region C1 and the threshold region C2), the state of the P-range key is determined to be a fault state.
According to the technical scheme of the embodiment of the invention, the redundant design of P-gear key detection is formed by arranging the three contact keys in parallel and combining the states of the keys, the circuit is easy to install, the whole vehicle does not need to be disassembled, and the application range is wide; the fault state of the P-gear key can be effectively identified, and the working safety of the electronic gear shifting system is improved.
Example two
Fig. 2 is a flowchart of a circuit method for detecting a P-range key in a second embodiment of the present invention, where this embodiment is applicable to a situation of detecting a state of a P-range key of an electronic shift system, and the method can be executed by a device for detecting a P-range key, where the device can be implemented by hardware, or implemented by hardware and software, and the method is based on a circuit for detecting a P-range key provided in any embodiment of the present invention, as shown in fig. 2, and the method includes:
and step 210, detecting the output voltage of the detection circuit of the P-gear key.
The detection circuit of the P-gear key is provided by any embodiment of the invention. The method comprises the following steps: a first contact key K1, a second contact key K2, a third contact key K3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5. The first contact key K1 is connected in series with the first resistor R1 to form a first branch, the second contact key K2 is connected in series with the second resistor R2 to form a second branch, and the third contact key K3 and the third contact key R2 are connected in series with the second contact key R2 to form a second branchThe third resistor R3 is connected in series to form a third branch circuit, the fourth resistor R4, the first branch circuit, the second branch circuit and the third branch circuit are connected in parallel, one end of the first branch circuit, one end of the second branch circuit and one end of the third branch circuit are connected with an input voltage VCC, and the other end of the first branch circuit, one end of the second branch circuit and one end of the third branch circuit are connected with the fifth resistor in series R5 and then are grounded. The voltage at two ends of the third contact key K3 is output voltage VO。
And step 220, determining the state of the P gear key according to the value of the output voltage.
The value of the output voltage is determined in accordance with the power supply system of the vehicle, the detection circuit, and other circuits related to the detection circuit. The embodiment of the invention does not limit the range of the output voltage.
Specifically, the normal value of the output voltage is in the range of 8.5V to 15.5V, such as 10V, 12V, etc.
Optionally, the determining the state of the P-range key according to the value of the output voltage includes:
and determining the state of the P gear key according to the value and the duration of the output voltage.
Wherein the duration refers to a duration of the output voltage, or a duration of time that each key maintains the current state.
Illustratively, in conjunction with the detection circuit of the P-range key shown in fig. 1, when the states of the first contact key K1 and the second contact key K2 are closed for 80ms, and the state of the third contact key K3 is kept open, the output voltage is U1, and accordingly, the duration of the output voltage U1 reaches 80ms, then it is determined that the P-range key is pressed or closed. Similarly, the above description is applicable to the case where the first contact key K1, the second contact key K2, and the third contact key K3 are combined in other states, and no example is given here.
Optionally, the determining the state of the P-range key according to the value and the duration of the output voltage includes:
when the output voltage belongs to a first threshold interval and the duration is longer than the set time, determining that the state of the P-gear key is a connection state; when the output voltage belongs to a second threshold interval and the duration is longer than the set time, determining that the state of the P-gear key is a disconnected state; and when the duration time of the output voltage is less than a set time or the output voltage belongs to a third threshold interval, determining that the state of the P-gear key is a fault state.
The set time may be the time required by the key operation, or the time set by the user, and may be 50ms, 80ms, 100ms, or the like; no intersection exists among the first threshold interval, the second threshold interval and the third threshold interval; the fault state includes key jamming, voltage overshoot and other conditions. The first threshold interval corresponds to a situation in which at least two of the three keys are closed. The second threshold interval corresponds to the condition that at least two of the three keys are disconnected, the union of the first threshold interval and the second threshold interval is a normal range of the output voltage, and the third threshold interval corresponds to the condition that the output voltage does not belong to the normal range.
Illustratively, in conjunction with the detection circuit of the P-range key shown in fig. 1, when the states of the first contact key K1 and the second contact key K2 are closed but the duration is less than a set time, such as 70ms, and the state of the third contact key K3 is kept open, the output voltage is U1, and accordingly, the duration of the output voltage U1 is less than the set time, then the state of the P-range key is determined to be a fault state. Similarly, the above description is applicable to the case where the first contact key K1, the second contact key K2, and the third contact key K3 are combined in other states, and no example is given here.
Optionally, the method for detecting a P-range key further includes:
and when the state of the P-gear key is determined to be a fault state, locking the state of the P-gear key to be a disconnected state.
Specifically, after the state of the P-range key is determined to be the fault state, the P-range key should be confirmed again, for example, the detection is repeated for 3 times, or the detection is repeated for a period of time, for example, 10ms, if the output voltage is always maintained in the fault state, the state of the P-range key is determined to be the fault state, and the state of the P-range key is locked to be the off state. Namely, after the state of the P-gear key is judged to be a fault state, the function of the P-gear key is shielded and cannot be used, so that the safety and reliability of parking are effectively guaranteed.
According to the technical scheme of the embodiment of the invention, the output voltage of the P-gear key is detected, the detection of the state of the P-gear key is carried out according to the output voltage and the duration, the detection result is accurate and reliable, the method is easy to realize, the cost is low, the method is easy to integrate with a vehicle, the working safety of an electronic gear shifting system is effectively guaranteed, and the vehicle using experience of a user is improved.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a P-range key detection device according to a third embodiment of the present invention, and as shown in fig. 3, the P-range key detection device includes: the device comprises a P-gear key detection circuit 310, an output voltage detection module 320 and a P-gear key state determination module 330.
The P-shift key detection circuit 310 is a P-shift key detection circuit provided in any embodiment of the present invention; the output voltage detection module 320 is used for detecting the output voltage of the detection circuit of the P-gear key; the P-range key state determination module 330 is configured to determine a state of the P-range key according to the value of the output voltage.
According to the technical scheme of the embodiment of the invention, the output voltage of the P-gear key is detected, the detection of the state of the P-gear key is carried out according to the output voltage and the duration, the detection result is accurate and reliable, the method is easy to realize, the cost is low, the method is easy to integrate with a vehicle, the working safety of an electronic gear shifting system is effectively guaranteed, and the vehicle using experience of a user is improved.
Optionally, the P-gear key state determining module 330 is specifically configured to:
and determining the state of the P gear key according to the value and the duration of the output voltage.
Optionally, the P-gear key state determining module 330 includes:
the on-state determining unit is used for determining that the state of the P-gear key is an on state when the output voltage belongs to a first threshold interval and the duration is longer than set time;
the disconnection state determining unit is used for determining that the state of the P gear key is a disconnection state when the output voltage belongs to a second threshold interval and the duration is longer than the set time;
and the fault state determination unit is used for determining that the state of the P-gear key is a fault state when the duration time of the output voltage is less than a set time or the output voltage belongs to a third threshold interval.
Optionally, the detection device for the P-range key further includes:
and the fault processing module is used for locking the state of the P-gear key into a disconnected state when the state of the P-gear key is determined to be a fault state.
The detection device for the P-file key provided by the embodiment of the invention can execute the detection method for the P-file key provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
Fig. 4 is a schematic structural diagram of an electronic shift system according to a fourth embodiment of the present invention, as shown in fig. 4, the electronic shift system includes: shift handle 420, electronic shifter 430, shift controller 440, and shift actuator 450.
The gearshift knob 420 includes a P-range button 410 and a P-range button detection circuit 460. The P-shift key detection circuit 460 is a P-shift key detection circuit provided in any embodiment of the present invention.
Specifically, the electronic shifter 430 includes a detection circuit 460 for detecting the operation of the shift lever of the driver and receiving the output voltage inputted from the P-range key, and determining the state of the P-range key according to the output voltage; the gear shifting controller 440 is used for receiving a gear shifting signal input by the electronic gear shifter and controlling a gear shifting actuator to perform corresponding operation according to the gear shifting signal and the state of the P-gear key; the shift actuator 450 is used to perform a shifting operation; the P-range key detection circuit 460 is used for detecting the state of the P-range key 410.
The electronic gear shifting system also comprises a fault processing device which is used for controlling the state of the P-gear key to be locked into an off state when the state of the P-gear key is in a fault state.
EXAMPLE five
An embodiment of the present invention further provides a storage medium containing computer-executable instructions, where the computer-executable instructions are executed by a computer processor to perform a method for detecting a P-range key, where the method is applied to a detection circuit of the P-range key provided in any embodiment of the present invention, and the method includes:
detecting the output voltage of a detection circuit of the P-gear key;
and determining the state of the P-gear key according to the value of the output voltage.
Of course, the storage medium provided by the embodiment of the present invention contains computer-executable instructions, and the computer-executable instructions are not limited to the method operations described above, and may also perform related operations in the method for detecting a P-range key provided by any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the detection apparatus for a P-range key, each included unit and module are only divided according to functional logic, but are not limited to the above division, as long as the corresponding function can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A detection circuit of P-gear key is characterized by comprising: the device comprises a first contact key, a second contact key, a third contact key, a first resistor, a second resistor, a third resistor, a fourth resistor and a fifth resistor, wherein the first contact key and the first resistor are connected in series to form a first branch circuit, the second contact key and the second resistor are connected in series to form a second branch circuit, the third contact key and the third resistor are connected in series to form a third branch circuit, the fourth resistor, the first branch circuit, the second branch circuit and the third branch circuit are connected in parallel, one end of the first branch circuit, one end of the second branch circuit and one end of the third branch circuit are connected with an input voltage, one end of the first branch circuit, one end of the second branch circuit and one end of the third branch circuit are connected with the fifth resistor in series and then are grounded, and the voltages at two ends of the third contact key are output voltages to detect the state of the P-.
2. The circuit of claim 1, wherein the first and second contact keys are silicone keys.
3. The circuit of claim 1, wherein the third contact key is a metal touch key.
4. The circuit of claim 1, wherein the first contact button and the second contact button are disposed at one side of the P-stage button at a predetermined interval, and the third contact button is disposed at the other side of the P-stage button.
5. A detection method for a P-gear key, which is applied to a detection circuit for the P-gear key according to any one of claims 1-4, and comprises the following steps:
detecting the output voltage of a detection circuit of the P-gear key;
and determining the state of the P-gear key according to the value of the output voltage.
6. The method of claim 5, wherein determining the state of the P-range key based on the value of the output voltage comprises:
and determining the state of the P gear key according to the value and the duration of the output voltage.
7. The method of claim 6, wherein determining the state of the P-range key based on the value and duration of the output voltage comprises:
when the output voltage belongs to a first threshold interval and the duration is longer than the set time, determining that the state of the P-gear key is a connection state;
when the output voltage belongs to a second threshold interval and the duration is longer than the set time, determining that the state of the P-gear key is a disconnected state;
and when the duration time of the output voltage is less than a set time or the output voltage belongs to a third threshold interval, determining that the state of the P-gear key is a fault state.
8. The method of claim 7, further comprising:
and when the state of the P-gear key is determined to be a fault state, locking the state of the P-gear key to be a disconnected state.
9. An electronic shifting system, comprising: shift handle, electronic shifter, shift controller and shift actuator, wherein the shift handle comprises a P-range key and a detection circuit of the P-range key of claims 1-4.
10. A storage medium containing computer-executable instructions, which when executed by a computer processor, perform a method of detecting a P-range key according to any one of claims 5 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911038657.6A CN110824901A (en) | 2019-10-24 | 2019-10-24 | Detection circuit, method, system and storage medium for P-gear key |
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| CN201911038657.6A CN110824901A (en) | 2019-10-24 | 2019-10-24 | Detection circuit, method, system and storage medium for P-gear key |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963522A (en) * | 2021-02-02 | 2021-06-15 | 东风汽车集团股份有限公司 | Electronic shifter access P-gear protection control method, system and storage medium |
| CN113103976A (en) * | 2021-04-21 | 2021-07-13 | 宁波汽车软轴软管有限公司 | Automobile P key fault detection system |
-
2019
- 2019-10-24 CN CN201911038657.6A patent/CN110824901A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963522A (en) * | 2021-02-02 | 2021-06-15 | 东风汽车集团股份有限公司 | Electronic shifter access P-gear protection control method, system and storage medium |
| CN112963522B (en) * | 2021-02-02 | 2022-04-29 | 东风汽车集团股份有限公司 | Electronic shifter access P-gear protection control method, system and storage medium |
| CN113103976A (en) * | 2021-04-21 | 2021-07-13 | 宁波汽车软轴软管有限公司 | Automobile P key fault detection system |
| CN113103976B (en) * | 2021-04-21 | 2022-09-13 | 宁波汽车软轴软管有限公司 | Automobile P key fault detection system |
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