CN113515069A - Kick control system based on recognizer - Google Patents
Kick control system based on recognizer Download PDFInfo
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- CN113515069A CN113515069A CN202110763691.0A CN202110763691A CN113515069A CN 113515069 A CN113515069 A CN 113515069A CN 202110763691 A CN202110763691 A CN 202110763691A CN 113515069 A CN113515069 A CN 113515069A
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- 230000001186 cumulative effect Effects 0.000 claims description 15
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- 238000013459 approach Methods 0.000 claims description 6
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
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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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
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Abstract
The invention relates to a kick control system based on an identifier, which comprises a kick system and an identifier system, wherein the kick system comprises an induction antenna, a capacitance sensor and a kick controller, the identifier system comprises an identifier base station and an identifier key, and the identifier system comprises: the induction antenna is used for inducing the environment change condition of the automobile; the capacitive sensor is used for feeding back the environment change condition of the automobile to the kick controller; the kick controller is used for determining whether kick action exists according to the environment change condition of the automobile, and sending a kick signal to the recognizer system when the kick action exists; the recognizer base station is used for receiving the kick signal, matching and verifying the kick signal with the recognizer key, and sending the kick signal after the verification is passed; the identifier key is used for matching verification with the identifier base station. According to the invention, the condition of kick misoperation can be reduced or even avoided through a dual mechanism of the kick system and the recognizer system, and the vehicle using experience of a user is greatly improved.
Description
Technical Field
The invention relates to the technical field of automobile electronic control, in particular to a kick control system based on an identifier.
Background
Along with the wide use of kart and private car, when the user is occupied because of shopping or other condition both hands, it is inconvenient to open or close the car tail-gate through the hand, does not open the car tail-gate through the button for solving, improves user experience, and current solution is to increase the foot and kick the system, does the kicking action through the foot in car rear bumper below, and the foot is kicked the system and is produced simulation key signal and open the car tail-gate.
However, the conventional kicking system has a problem of malfunction, the more sensitive the response is, the higher the probability of malfunction is, and during unlocking of the vehicle, the tail gate may be opened due to the non-movement of the kicking signal, for example, when a passerby (non-owner) intentionally or unintentionally kicks the vehicle with a foot, the tail gate may be opened, so that the conventional kicking system is prone to misoperation.
Disclosure of Invention
In view of the above, there is a need for a kick control system based on an identifier, which can reduce or even avoid the occurrence of misoperation and provide user experience.
The invention provides a kick control system based on a recognizer, which comprises: system and recognizer system are played to the foot, the system is played to the foot includes induction antenna, capacitive sensor and foot and plays the controller, and recognizer system includes recognizer basic station and recognizer key, wherein:
the induction antenna is used for inducing the environment change condition of the automobile;
the capacitive sensor is used for feeding back the environment change condition of the automobile to the kick controller;
the kick controller is used for determining whether kick action exists according to the environment change condition of the automobile, and sending a kick signal to the recognizer system when the kick action exists;
the recognizer base station is used for receiving the kick signal, matching and verifying the kick signal with the recognizer key, and sending the kick signal after the verification is passed;
the identifier key is used for matching verification with the identifier base station.
Preferably, the change condition of the automobile environment comprises a reference field strength value, an actual field strength value, a field strength cumulative change value and an environment conversion coefficient of the automobile environment.
Preferably, the kick controller includes an environment calibration unit and a kick action calculation unit, wherein:
the environment calibration unit is used for acquiring a reference field intensity value, an actual field intensity value, a field intensity cumulative change value and an environment conversion coefficient of the automobile environment, and calibrating the automobile environment based on the reference scene value, the actual field intensity value, the field intensity cumulative change value and the environment conversion coefficient of the automobile environment;
the kick action calculating unit is used for determining the induction state and the induction time stage of the induction antenna and determining whether a kick action exists based on the induction state and the induction time stage of the induction antenna.
Preferably, in the environment calibration unit, the vehicle environment calibration is performed based on a reference field intensity value, an actual field intensity value, a field intensity cumulative variation value and an environment conversion coefficient of the vehicle environment, and specifically includes performing the vehicle environment calibration by using an environment calibration calculation formula, where the environment calibration calculation formula is:
Li＝Li-1+Di-1/K；
Di＝Di-1+C-Li-(Li-Li-1)·K；
wherein L is a reference field intensity value, LiFor the current reference field strength value, Li-1The last reference field strength value, D is the cumulative variation value of field strength, DiAccumulating the variation value for the currently calculated field strength, Di-1And C is the actual field intensity value read currently, and K is the conversion coefficient.
Preferably, in the kick action calculating unit, the sensing state of the sensing antenna is a sensed state and an un-sensed state, and the determining the sensing state of the sensing antenna specifically includes: setting an entry threshold and an exit threshold, and determining an induction state of the induction antenna based on the entry threshold and the exit threshold, wherein,
when the current induction field intensity value of the induction antenna is smaller than or equal to the entrance threshold value, the induction antenna is in an uninductive state; when the current induction field intensity value of the induction antenna is larger than the entry threshold value, the induction antenna enters an induced state; when the induction antenna is in an induced state, if the current induction field intensity value of the induction antenna is smaller than the exit threshold value, the induction antenna enters an uninductive state.
Preferably, in the kick motion calculating unit, there are two sensing antennas, and the sensing time period is divided into a no-motion period, an approaching period, a holding period, and a leaving period, where:
the two induction antennas are in an un-induction state and enter a no-action stage;
in the non-action stage, if any induction antenna is in an induced state, entering an approach stage;
in the approach stage, the two induction antennas are in an un-induction state, the non-action stage is entered, the two induction antennas are in an induction state, and the holding stage is entered;
in the holding stage, if any one induction antenna is in an un-induction state, entering a leaving stage and recording the holding time;
and in the leaving stage, the two induction antennas are in an induced state, and the holding stage is entered again.
Preferably, in the kick action calculating unit, determining whether a kick action exists based on the sensing state and the sensing time period of the sensing antenna specifically includes:
determining a time difference value of the two induction antennas when the two induction antennas enter a holding stage, and defining the time difference value as an entering time; determining a time difference value of the two induction antennas when the two induction antennas exit the holding stage, and defining the time difference value as exit time; determining the duration of the two induction antennas in the holding stage, and respectively defining the duration as a first holding time and a second holding time;
when the entering time or the exiting time is larger than a set threshold value, generating a kick signal;
and when the time difference value between the first holding time and the second holding time is greater than a set threshold value, generating a kick signal.
Preferably, the matching verification of the identifier base station and the identifier key specifically includes:
when the recognizer base station receives a kick signal, awakening a recognizer base station controller and sending a low-frequency signal to the recognizer key;
if the identifier key is in the induction range, receiving the low-frequency signal, waking up a controller in the identifier key, verifying the low-frequency signal, and sending a high-frequency signal and low-frequency intensity back to the identifier base station after the verification is passed;
and the identifier base station receives the high-frequency signal at preset time, verifies the high-frequency signal, determines the distance between the identifier key and the identifier base station according to the low-frequency intensity fed back by the identifier key, and successfully verifies the identifier key when the distance between the identifier key and the identifier base station is smaller than the set distance.
Preferably, the recognizer base station comprises a recognizer base station circuit, and the recognizer base station circuit comprises a power supply circuit, a first MCU circuit, a wake-up circuit, a high-frequency receiving circuit and a low-frequency transmitting circuit; the power supply circuit is electrically connected with the first MCU circuit and used for supplying power to the first MCU circuit; the wake-up circuit is electrically connected with the first MCU circuit and is used for waking up the first MCU circuit; the first MCU circuit is electrically connected with the high-frequency receiving circuit and the low-frequency transmitting circuit and is used for transmitting a low-frequency signal to the low-frequency transmitting circuit to drive the low-frequency antenna; the high-frequency receiving circuit is used for receiving a high-frequency signal and outputting the high-frequency signal to the first MCU circuit.
Preferably, the recognizer key comprises a recognizer key circuit, and the recognizer key circuit comprises a button battery, a second MCU circuit, a low-frequency receiving circuit and a high-frequency transmitting circuit; the button battery is electrically connected with the second MCU circuit and used for supplying power to the second MCU circuit; the second MCU circuit is electrically connected with the low-frequency receiving circuit and the high-frequency transmitting circuit, the low-frequency receiving circuit is used for awakening the second MCU circuit after receiving a low-frequency signal, and the high-frequency transmitting circuit is used for transmitting a high-frequency signal.
Has the advantages that: according to the invention, the occurrence of the false operation of the kick can be reduced or even avoided through the kick system and the recognizer system, the vehicle using experience of a user is greatly improved, the original kick system is not influenced, only the kick signal is legally verified, and in addition, the recognizer system carries out encryption communication processing through the data of the low-frequency signal and the high-frequency signal, so that the safety verification can be realized.
Drawings
FIG. 1 is a system architecture diagram of an embodiment of a recognizer-based kick control system provided in the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of a kick controller main control chip in the kick control system based on the recognizer according to the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of a kick controller main control chip in the kick control system based on the recognizer according to the present invention;
FIG. 4 is a schematic circuit diagram of an embodiment of a first buck power supply circuit in the identifier system of the present invention;
FIG. 5 is a schematic circuit diagram of an embodiment of a second buck power supply circuit in the identifier system of the present invention;
FIG. 6 is a schematic circuit diagram of an embodiment of a wake-up circuit in the recognizer system according to the present invention;
FIG. 7 is a schematic circuit diagram of an embodiment of a high frequency receiving circuit in the recognizer system according to the present invention;
FIG. 8 is a schematic circuit diagram of an embodiment of a low frequency transmit circuit in the recognizer system provided by the present invention;
FIG. 9 is a schematic circuit diagram of an embodiment of a low frequency receive circuit in the recognizer system provided by the present invention;
fig. 10 is a schematic circuit diagram of an embodiment of a high frequency transmission circuit in the identifier system according to the present invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
As shown in fig. 1, the present invention provides a system architecture diagram of an embodiment of a kick control system based on a recognizer, the kick control system 1 includes a kick system 10 and a recognizer system 20, the kick system 10 includes an inductive antenna 110, a capacitive sensor 120, and a kick controller 130, and the recognizer system 20 includes a recognizer base station 210 and a recognizer key 220.
In a specific embodiment, the sensing antenna 110 is used for sensing environmental changes of the vehicle; the capacitive sensor 120 is used for feeding back the environment change condition of the automobile to the kick controller; the kick controller 130 is configured to determine whether a kick action exists according to the environment change condition of the vehicle, and send a kick signal to the recognizer system 20 when the kick action exists; the identifier base station 210 is configured to perform matching verification with the identifier key after receiving the kick signal, and send the kick signal after the verification passes; the identifier key 220 is used for matching verification with the identifier base station.
Specifically, the sensing antenna 110 is installed at the position of the rear bumper of the automobile, and forms a capacitor with the ground or the human body, and in order to further explain the circuit connection relationship of the sensing antenna 110, please refer to fig. 3, in this embodiment, the sensing antenna 110 is connected to the CAPT1 and the CAPT2, and is connected to the main control chip in the kick controller 130 through the matching resistors R4 and R18 and the inductors FB1 and FB 2.
As a specific embodiment, the kick controller 130 includes a main control chip, which is model MSP430FR2512, and specifically referring to fig. 2, the sensor inside the main control chip digitizes the capacitance field strength between the sensing antenna and the environment to obtain a real-time field strength value (count). The kick controller calculates kick action by reading digital capacitance field intensity signals sensed by the capacitance sensor. When there is no kicking action and the environment is not changed, the count generally tends to be stable, and the count at this time is set as the environment reference value LTA. When a kick is performed, the field intensity, namely the count, is changed because a human body enters the induction range, and the closer the human body is to the induction antenna, the larger the count change is.
As a preferred embodiment, the change condition of the automobile environment comprises a reference field intensity value, an actual field intensity value, a field intensity cumulative change value and an environment conversion coefficient of the automobile environment.
The present invention further provides a specific embodiment, wherein the kick controller includes an environment calibration unit and a kick action calculation unit, wherein: the environment calibration unit is used for acquiring a reference field intensity value, an actual field intensity value, a field intensity cumulative change value and an environment conversion coefficient of the automobile environment, and calibrating the automobile environment based on the reference scene value, the actual field intensity value, the field intensity cumulative change value and the environment conversion coefficient of the automobile environment;
the kick action calculating unit is used for determining the induction state and the induction time stage of the induction antenna and determining whether a kick action exists based on the induction state and the induction time stage of the induction antenna.
As a preferred embodiment, in the environment calibration unit, the vehicle environment calibration is performed based on a reference field strength value, an actual field strength value, a field strength cumulative change value, and an environment conversion coefficient of the vehicle environment, and specifically includes performing the vehicle environment calibration by using an environment calibration calculation formula, where the environment calibration calculation formula is:
Li＝Li-1+Di-1/K；
Di＝Di-1+C-Li-(Li-Li-1)·K；
wherein L is a reference field intensity value, LiFor the current reference field strength value, Li-1The last reference field strength value, D is the cumulative variation value of field strength, DiAccumulating the variation value for the currently calculated field strength, Di-1And C is the actual field intensity value read currently, and K is the conversion coefficient.
As a preferred embodiment, in the kick action calculating unit, the sensing state of the sensing antenna is a sensed state and an non-sensed state, and the determining the sensing state of the sensing antenna specifically includes: setting an entry threshold and an exit threshold, and determining the induction state of the induction antenna based on the entry threshold and the exit threshold, wherein when the current induction field strength value of the induction antenna is smaller than or equal to the entry threshold, the induction antenna is in an uninductive state; when the current induction field intensity value of the induction antenna is larger than the entry threshold value, the induction antenna enters an induced state; when the induction antenna is in an induced state, if the current induction field intensity value of the induction antenna is smaller than the exit threshold value, the induction antenna enters an uninductive state.
As a preferred embodiment, in the kick motion calculating unit, there are two sensing antennas, and the sensing time period is divided into a no-motion period, an approaching period, a holding period, and a leaving period, where:
the two induction antennas are in an un-induction state and enter a no-action stage;
in the non-action stage, if any induction antenna is in an induced state, entering an approach stage;
in the approach stage, the two induction antennas are in an un-induction state, the non-action stage is entered, the two induction antennas are in an induction state, and the holding stage is entered;
in the holding stage, if any one induction antenna is in an un-induction state, entering a leaving stage and recording the holding time;
and in the leaving stage, the two induction antennas are in an induced state, and the holding stage is entered again.
As a preferred embodiment, in the kick action calculating unit, determining whether a kick action exists based on the sensing state and the sensing time period of the sensing antenna specifically includes:
determining a time difference value of the two induction antennas when the two induction antennas enter a holding stage, and defining the time difference value as an entering time; determining a time difference value of the two induction antennas when the two induction antennas exit the holding stage, and defining the time difference value as exit time; determining the duration of the two induction antennas in the holding stage, and respectively defining the duration as a first holding time and a second holding time;
when the entering time or the exiting time is larger than a set threshold value, generating a kick signal;
and when the time difference value between the first holding time and the second holding time is greater than a set threshold value, generating a kick signal.
As a preferred embodiment, the matching verification between the identifier base station and the identifier key specifically includes:
when the recognizer base station receives a kick signal, awakening a recognizer base station controller and sending a low-frequency signal to the recognizer key;
if the identifier key is in the induction range, receiving the low-frequency signal, waking up a controller in the identifier key, verifying the low-frequency signal, and sending a high-frequency signal and low-frequency intensity back to the identifier base station after the verification is passed;
and the identifier base station receives the high-frequency signal at preset time, verifies the high-frequency signal, determines the distance between the identifier key and the identifier base station according to the low-frequency intensity fed back by the identifier key, and successfully verifies the identifier key when the distance between the identifier key and the identifier base station is smaller than the set distance.
Generally, the identifier base station is installed in a vehicle, and the identifier key is carried by the vehicle owner. And when the identifier base station receives the kick signal, starting to transmit low-frequency data through the low-frequency transmitting module. If the vehicle owner carries the identifier key within 1.5 meters of the vehicle tail, the identifier key can receive the low-frequency data through the low-frequency receiving module and simultaneously compares the pairing information with the identifier base station.
After the kick signal is sent to the recognizer system, the recognizer base station in the recognizer system receives the kick signal and then performs matching verification with the recognizer key, and the recognizer key 220 opens the door of the automobile after the matching verification is successful.
In a specific embodiment, the recognizer base station comprises a recognizer base station circuit, and the recognizer base station circuit comprises a power supply circuit, a first MCU circuit, a wake-up circuit, a high-frequency receiving circuit and a low-frequency transmitting circuit; the power supply circuit is electrically connected with the first MCU circuit and used for supplying power to the first MCU circuit; the wake-up circuit is electrically connected with the first MCU circuit and is used for waking up the first MCU circuit; the first MCU circuit is electrically connected with the high-frequency receiving circuit and the low-frequency transmitting circuit and is used for transmitting a low-frequency signal to the low-frequency transmitting circuit to drive the low-frequency antenna; the high-frequency receiving circuit is used for receiving a high-frequency signal and outputting the high-frequency signal to the first MCU circuit.
The recognizer key comprises a recognizer key circuit, and the recognizer key circuit comprises a button battery, a second MCU circuit, a low-frequency receiving circuit and a high-frequency transmitting circuit; the button battery is electrically connected with the second MCU circuit and used for supplying power to the second MCU circuit; the second MCU circuit is electrically connected with the low-frequency receiving circuit and the high-frequency transmitting circuit, the low-frequency receiving circuit is used for awakening the second MCU circuit after receiving a low-frequency signal, and the high-frequency transmitting circuit is used for transmitting a high-frequency signal.
As a preferred embodiment, please refer to fig. 4 and 5, the power supply circuit includes a first step-down power supply circuit and a second step-down power supply circuit, the first step-down power supply circuit is configured to convert an input dc voltage into a first voltage, the first voltage is configured to supply power to the first MCU circuit, the wake-up circuit, and the high-frequency receiving circuit, the second step-down power supply circuit is configured to convert an input dc voltage into a second voltage, and the second voltage is configured to supply power to the low-frequency transmitting circuit, where:
the first voltage reduction power supply circuit comprises a first voltage reduction chip U1, a capacitor C4, a capacitor C5, a capacitor C8 and a capacitor C9, wherein the capacitor C4 is connected with the capacitor C5 in parallel, one end of the capacitor C4 is connected with the input end of the first voltage reduction chip U1, the other end of the capacitor C8 is grounded, the capacitor C8 is connected with the capacitor C9 in parallel, one end of the capacitor C8 is connected with the output end of the first voltage reduction chip U1, and the other end of the capacitor C8 is grounded;
the second step-down power supply circuit comprises a second step-down chip U3, a capacitor C16, a capacitor C17, a capacitor C18 and a capacitor C19, the capacitor C16 is connected with the capacitor C18 in parallel, one end of the capacitor C16 is connected with the input end of the first step-down chip U3, the other end of the capacitor C17 is grounded, the capacitor C17 is connected with the capacitor C19 in parallel, one end of the capacitor C17 is connected with the output end of the first step-down chip U3, and the other end of the capacitor C17 is grounded.
As a specific example, the first voltage is 5V, and the second voltage is 9V. Generally, when an input direct current voltage 12V is converted into 5V through U1 and is provided to a first MCU circuit, a wake-up circuit and a high-frequency receiving circuit, the 12V is controlled by IO _ EN to obtain IO _12V through Q2, and the IO _12V is converted into 9V through U3 and is provided to a low-frequency transmitting circuit to drive an antenna to transmit. In the specific implementation, the typical working voltage of the automobile is 9-16V, and the power supply design supports 24V input.
As a preferred embodiment, the first MCU circuit includes a first MCU chip, and the chip model is AC7811 QBGE.
As a preferred embodiment, referring to fig. 6, the wake-up circuit includes a diode D3, a bidirectional transient suppression diode D4, a resistor R27, a resistor R28, and a capacitor C37, one end of the bidirectional transient suppression diode D4 is connected to a wake-up signal, the other end of the bidirectional transient suppression diode D3 is connected to ground, a positive end of the bidirectional transient suppression diode D4 is connected to a wake-up signal, the positive end of the bidirectional transient suppression diode D3684 is connected to one ends of the resistor R27 and the resistor R28, the other end of the resistor R27 is connected to the first voltage, the other end of the resistor R28 is connected to the capacitor C37 and the first MCU circuit input end, and the other end of the capacitor C37 is connected to ground. Specifically, the wake-up signal may be a signal triggered by human behaviors such as hand touch, foot kick, and the like.
As a preferred embodiment, referring to fig. 7, the high frequency receiving circuit includes a wireless receiving chip U4, a capacitor C14, a capacitor C15, a capacitor C20, an inductor L2, a capacitor C22, an inductor L3, a resistor R15, a capacitor C23, an oscillator Y1, a capacitor C21, and a resistor R12; the VSSRE end of the wireless receiving chip U4 is grounded; an ANT end of the wireless receiving chip U4 is connected to a common end of the capacitor C20 and the inductor L3, the other end of the capacitor C20 is connected to a first common end of the inductor L2 and the capacitor C22, the other end of the inductor L3 is connected to a second common end of the inductor L2 and the capacitor C22, and the second common end is grounded; a VDDRE end of the wireless receiving chip U4 is connected to the first voltage, one end of the capacitor C14 is connected to the first voltage, the other end of the capacitor C14 is grounded, one end of the capacitor C15 is connected to the first voltage, and the other end of the capacitor C15 is grounded; the CTH end of the wireless receiving chip U4 is connected with one end of a resistor R15, the other end of the resistor R15 is connected with the first voltage, the CTH end of the wireless receiving chip U4 is also connected with one end of a capacitor C23, and the other end of the capacitor C23 is grounded; the REFOSC end of the wireless receiving chip U4 is connected with one end of an oscillator Y1, and the other end of the oscillator Y1 is connected with the ground; the CAGC end of the wireless receiving chip U4 is connected with one end of a capacitor C21, and the other end of the capacitor C21 is grounded; the SHUT/WAKEB end of the wireless receiving chip U4 is connected with one end of a resistor R12, and the other end of R12 is connected with a first MCU circuit and used for controlling the working mode of U4; and the DO end of the wireless receiving chip U4 is connected with the first MCU circuit and is used for outputting a high-frequency signal to the first MCU circuit.
Specifically, the model of the wireless receiving chip U4 is SYN480R, and the wireless high frequency in this embodiment is 433 MHz.
As a preferred embodiment, referring to fig. 8, the low frequency transmitting circuit includes a low frequency transmitting chip U5, a resistor R13, a resistor R14, a resistor R16, a resistor R17, and a capacitor C24; the VDD end of the low-frequency transmitting chip U5 is connected with the second voltage, and the CND end is grounded; the INA end and the INB end of the low-frequency emission chip U5 are both connected with one end of a resistor R16, and the other end of the resistor R16 is connected with the first MCU circuit; an ENB _ A end and an ENB _ B end of the low-frequency transmitting chip U5 are both connected with one end of a resistor R14, the other end of the resistor R14 is also connected with the first MCU circuit, the ENB _ A end and the ENB _ B end of the low-frequency transmitting chip U5 are both connected with one end of a resistor R13, and the other end of the resistor R13 is grounded; the OUTA of the low-frequency transmitting chip U5 is connected with an external plug connector, the OUTB of the low-frequency transmitting chip U5 is connected with one end of R17, and the other end of the R17 is connected with the external plug connector.
Specifically, the low-frequency transmitting chip U5 is composed of MOSFET field effect transistors, when the input INA and INB of the MOSFET field effect transistors are provided with PWM with the frequency of 125K by the MCU, low-frequency data are subjected to protocol coding and are output to the ENA and ENB of the MOSFET by the first MCU circuit.
As a preferred embodiment, the button cell is used for providing a third voltage, the third voltage is 3V, and the power consumption of the button cell is low. The second MCU circuit includes the second MCU chip, and the chip model is STM32G031, and its advantage is that the operating voltage is low, is 1.7V to 3.6V, and the consumption is little, and the minimum dormancy electric current is less than 0.1 uA.
As a preferred embodiment, referring to fig. 9, the low frequency receiving circuit includes a low frequency receiving chip U6, a capacitor C40, an inductor L1A, an inductor L1B, an inductor L1C, a capacitor C41, a capacitor C42, and a capacitor C43; the VCC end of the low-frequency receiving chip U6 is connected to the third voltage, the GND end is grounded, one end of the C40 is connected to the third voltage, and the other end of the C40 is grounded; an LF1P end of the low-frequency receiving chip U6 is connected with a common end of an inductor L1C and a common end of a capacitor C42 which are connected in parallel, the other common end of the inductor L1C and the other common end of the capacitor C42 are grounded, an LF2P end of the low-frequency receiving chip U6 is connected with a common end of the inductor L1B and a common end of the capacitor C43 which are connected in parallel, the other common end of the inductor L1B and the other common end of the capacitor C43 are grounded, an LF3P end of the low-frequency receiving chip U6 is connected with a common end of an inductor L1A and a common end of a capacitor C41 which are connected in parallel, and the other common end of the inductor L1A and the other common end of the capacitor C41 are grounded.
Specifically, the model of the low-frequency receiving chip U6 is AS3933, the chip is configured by the second MCU circuit through SPI communication (CS, SCL, SDI, SDO), and the communication protocol and the configuration mode refer to the specification of AS 3933. L1A, L1B, and L1C are receiving antennas, and C41, C42, and C43 are matching capacitors of the antennas, respectively, and are responsible for adjusting the oscillation frequency of the antennas to 125K. When receiving the low frequency signal, firstly judging the leading data and the mode word, if the leading data and the mode word meet the requirement, generating a high level signal on a WAKE pin of the AS3933 to WAKE up the MCU, and then continuously receiving the rest data by the MCU through the DAT.
As a preferred embodiment, referring to fig. 10, the high frequency transmitting circuit includes a high frequency transmitting chip SYN115, an inductor L4, a capacitor C45, a capacitor C47, an inductor L5, a capacitor C48, a capacitor C49, a capacitor C50, an oscillator Y3, and a resistor R30; the VDD terminal of the high-frequency transmitting chip SYN115 is connected to the third voltage, the VDD terminal is connected to one end of the capacitor C48, the other end of the capacitor C48 is grounded, and the VSS terminal of the high-frequency transmitting chip SYN115 is grounded; the PAOUT end of the high-frequency emission chip SYN115 is connected with a common end of an inductor L4 and a capacitor C45, the other end of the inductor L4 is connected with a third voltage, the other end of the capacitor C45 is connected with one end of an L5, the other end of the L5 is connected with one end of a capacitor C47, and the other end of the capacitor C47 is grounded; the ASK end of the high-frequency transmitting chip SYN115 is connected to one end of a resistor R30, and the other end of the resistor R30 is grounded; the XTLIN terminal of the high-frequency transmitting chip SYN115 is connected to the common terminal of the capacitor C50 and the oscillator Y3, and the other terminal of the capacitor C50 is grounded; the XTLOUT terminal of the high-frequency transmitting chip SYN115 is connected to the common terminal of the capacitor C49 and the oscillator Y3, and the other terminal of the capacitor C49 is grounded.
Specifically, the high-frequency transmitting chip SYN115 in the high-frequency transmitting circuit and the high-frequency receiving chip SYN480R of the identifier base station constitute a pair of high-frequency 433MHz communication transceivers. The frequency of the signal is multiplied to 433MHz by SYN115 provided by a 16M crystal oscillator Y3, and the first MCU circuit transmits a data signal through ASK.
In summary, the kick control system based on the recognizer provided by the invention has the following beneficial effects: the invention can realize the identity recognition function required by the standard under the condition of low cost, and the power consumption of the recognizer key is lower. Through testing, the dormancy current of recognizer key is about 3uA, mainly is the standby power consumption of low frequency receiving chip, and the dormancy current of MCU circuit is less than 0.1uA, and high frequency transmitting circuit is out of work when dormancy. The nominal capacity of the button battery is generally 240mAh, the button battery can be placed for 9 years after being installed with the identifier key according to calculation, the current of the identifier key is about 1mA when the identifier key works normally, the identifier key is in a dormant state in most of time in a normal working scene, and the button battery works only after receiving an effective low-frequency signal, so that the button battery can be used for about 5 years after the battery is replaced by an estimated product. The recognizer base station is installed on a vehicle body, and the dormant current can be less than 0.1mA through testing, so that the requirements of electronic appliances of the vehicle are met. According to the invention, the occurrence of the false operation of the kick can be reduced or even avoided through the kick system and the recognizer system, the vehicle using experience of a user is greatly improved, the original kick system is not influenced, only the kick signal is legally verified, and in addition, the recognizer system carries out encryption communication processing through the data of the low-frequency signal and the high-frequency signal, so that the safety verification can be realized.
In summary, the preferred embodiments of the present invention are described, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention shall be covered by the scope of the present invention.
Claims (10)
1. The utility model provides a control system is played to foot based on recognizer, its characterized in that, includes foot system and recognizer system of playing, the foot system of playing includes induction antenna, capacitive sensor and foot controller of playing, and recognizer system includes recognizer basic station and recognizer key, wherein:
the induction antenna is used for inducing the environment change condition of the automobile;
the capacitive sensor is used for feeding back the environment change condition of the automobile to the kick controller;
the kick controller is used for determining whether kick action exists according to the environment change condition of the automobile, and sending a kick signal to the recognizer system when the kick action exists;
the recognizer base station is used for receiving the kick signal, matching and verifying the kick signal with the recognizer key, and sending the kick signal after the verification is passed;
the identifier key is used for matching verification with the identifier base station.
2. The recognizer-based kick control system of claim 1, wherein the environmental change condition of the vehicle comprises a reference field strength value, an actual field strength value, a cumulative field strength change value, and an environmental conversion factor of the environmental of the vehicle.
3. The recognizer-based kick control system of claim 2, wherein the kick controller comprises an environment calibration unit and a kick action calculation unit, wherein:
the environment calibration unit is used for acquiring a reference field intensity value, an actual field intensity value, a field intensity cumulative change value and an environment conversion coefficient of the automobile environment, and calibrating the automobile environment based on the reference scene value, the actual field intensity value, the field intensity cumulative change value and the environment conversion coefficient of the automobile environment;
the kick action calculating unit is used for determining the induction state and the induction time stage of the induction antenna and determining whether a kick action exists based on the induction state and the induction time stage of the induction antenna.
4. The identifier-based kicking control system of claim 3, wherein in the environment calibration unit, the environment calibration is performed based on the reference field intensity value, the actual field intensity value, the field intensity cumulative variation value and the environment conversion coefficient of the vehicle environment, and specifically comprises performing the environment calibration by using an environment calibration calculation formula, wherein the environment calibration calculation formula is:
Li＝Li-1+Di-1/K；
Di＝Di-1+C-Li-(Li-Li-1)·K；
wherein L is a reference field intensity value, LiFor the current reference field strength value, Li-1The last reference field strength value, D is the cumulative variation value of field strength, DiAccumulating the variation value for the currently calculated field strength, Di-1And C is the actual field intensity value read currently, and K is the conversion coefficient.
5. The recognizer-based kick control system according to claim 3, wherein in the kick calculation unit, the sensing states of the sensing antenna are a sensed state and an non-sensed state, and the determining the sensing state of the sensing antenna specifically comprises: setting an entry threshold and an exit threshold, and determining an induction state of the induction antenna based on the entry threshold and the exit threshold, wherein,
when the current induction field intensity value of the induction antenna is smaller than or equal to the entrance threshold value, the induction antenna is in an uninductive state; when the current induction field intensity value of the induction antenna is larger than the entry threshold value, the induction antenna enters an induced state; when the induction antenna is in an induced state, if the current induction field intensity value of the induction antenna is smaller than the exit threshold value, the induction antenna enters an uninductive state.
6. The recognizer-based kick control system of claim 5, wherein the number of the sensing antennas is two in the kick motion calculation unit, and the sensing time period is divided into a no motion period, a proximity period, a hold period, and a leave period, wherein:
the two induction antennas are in an un-induction state and enter a no-action stage;
in the non-action stage, if any induction antenna is in an induced state, entering an approach stage;
in the approach stage, the two induction antennas are in an un-induction state, the non-action stage is entered, the two induction antennas are in an induction state, and the holding stage is entered;
in the holding stage, if any one induction antenna is in an un-induction state, entering a leaving stage and recording the holding time;
and in the leaving stage, the two induction antennas are in an induced state, and the holding stage is entered again.
7. The identifier-based kick control system according to claim 6, wherein the kick calculation unit determines whether a kick is performed based on the sensing state and the sensing time period of the sensing antenna, and specifically comprises:
determining a time difference value of the two induction antennas when the two induction antennas enter a holding stage, and defining the time difference value as an entering time; determining a time difference value of the two induction antennas when the two induction antennas exit the holding stage, and defining the time difference value as exit time; determining the duration of the two induction antennas in the holding stage, and respectively defining the duration as a first holding time and a second holding time;
when the entering time or the exiting time is larger than a set threshold value, generating a kick signal;
and when the time difference value between the first holding time and the second holding time is greater than a set threshold value, generating a kick signal.
8. The identifier-based kicking control system of claim 1, wherein the identifier base station performs matching verification with the identifier key, specifically comprising:
when the recognizer base station receives a kick signal, awakening a recognizer base station controller and sending a low-frequency signal to the recognizer key;
if the identifier key is in the induction range, receiving the low-frequency signal, waking up a controller in the identifier key, verifying the low-frequency signal, and sending a high-frequency signal and low-frequency intensity back to the identifier base station after the verification is passed;
and the identifier base station receives the high-frequency signal at preset time, verifies the high-frequency signal, determines the distance between the identifier key and the identifier base station according to the low-frequency intensity fed back by the identifier key, and successfully verifies the identifier key when the distance between the identifier key and the identifier base station is smaller than the set distance.
9. The recognizer-based kick control system of claim 8, wherein the recognizer base station comprises a recognizer base station circuit comprising a power circuit, a first MCU circuit, a wake-up circuit, a high frequency receive circuit, and a low frequency transmit circuit; the power supply circuit is electrically connected with the first MCU circuit and used for supplying power to the first MCU circuit; the wake-up circuit is electrically connected with the first MCU circuit and is used for waking up the first MCU circuit; the first MCU circuit is electrically connected with the high-frequency receiving circuit and the low-frequency transmitting circuit and is used for transmitting a low-frequency signal to the low-frequency transmitting circuit to drive the low-frequency antenna; the high-frequency receiving circuit is used for receiving a high-frequency signal and outputting the high-frequency signal to the first MCU circuit.
10. The recognizer-based kick control system of claim 8, wherein the recognizer key comprises a recognizer key circuit, the recognizer key circuit comprising a button battery, a second MCU circuit, a low frequency receiving circuit, and a high frequency transmitting circuit; the button battery is electrically connected with the second MCU circuit and used for supplying power to the second MCU circuit; the second MCU circuit is electrically connected with the low-frequency receiving circuit and the high-frequency transmitting circuit, the low-frequency receiving circuit is used for awakening the second MCU circuit after receiving a low-frequency signal, and the high-frequency transmitting circuit is used for transmitting a high-frequency signal.
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| CN202110763691.0A CN113515069A (en) | 2021-07-06 | 2021-07-06 | Kick control system based on recognizer |
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Application publication date: 20211019 |