CN216434698U - Fault detection device and parking auxiliary equipment - Google Patents

Abstract

The present disclosure provides a fault detection device and parking assistance apparatus, wherein the fault detection device includes: the input end of the signal detector is in signal connection with the driving mechanism; the input end of the logic control circuit is respectively in signal connection with the output ends of the limit sensor and the signal detector; and a fault indicator in signal connection with the output of the logic control circuit. The fault detection device can detect whether the limiting sensor breaks down or not, and avoids the locked rotor damage of the driving mechanism of the parking auxiliary equipment.

Description

Fault detection device and parking auxiliary equipment

Technical Field

The present disclosure relates to parking assistance, and more particularly, to a fault detection device and a parking assistance apparatus.

Background

On some intelligent management's parking stall, be provided with parking auxiliary equipment usually, when the vehicle will drive into the parking stall, parking auxiliary equipment's locking arm is in initial position, ensures that the vehicle can normally drive into the parking stall, and when the vehicle drives away from the parking stall, parking auxiliary equipment's locking arm is in the locking position to avoid other vehicles to drive into, occupy this parking stall.

In order to ensure that the locking arm of the parking assistance device can be accurately moved to the initial position or the locked position, the parking assistance device is provided with limit sensors at the initial position and the locked position, respectively. However, if the limit sensor fails, the limit sensor cannot trigger a signal that the lock arm reaches after the lock arm reaches the initial position or the locking position, which may cause misjudgment of the parking assistance device, and cause the driving mechanism of the parking assistance device to continue to drive the lock arm to move, resulting in the driving mechanism being locked and damaged.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fault detection device and parking auxiliary assembly can detect whether spacing sensor breaks down, avoids parking auxiliary assembly's actuating mechanism stall to damage.

In a first aspect, the present disclosure provides a fault detection apparatus for a parking assist device having a driving mechanism, a lock arm, and a limit sensor for detecting that the lock arm reaches a limit position, the driving mechanism being drivingly connected to the lock arm; the failure detection device includes:

the input end of the signal detector is in signal connection with the driving mechanism;

the input end of the logic control circuit is respectively in signal connection with the limiting sensor and the output end of the signal detector;

and a fault indicator in signal connection with an output of the logic control circuit.

As an optional embodiment, the logic control circuit includes a judgment sub-circuit and a timing switch sub-circuit;

the input end of the judging sub-circuit is respectively in signal connection with the limiting sensor and the output end of the signal detector, the output end of the judging sub-circuit is in signal connection with the input end of the timing switch sub-circuit, and the output end of the timing switch sub-circuit is in signal connection with the fault indicator.

As an optional implementation, the judgment sub-circuit includes a non-logic circuit and an and logic circuit;

the input end of the non-logic circuit is in signal connection with the limit sensor, the output end of the non-logic circuit is in signal connection with the first input end of the AND logic circuit, the output end of the signal detector is in signal connection with the second input end of the AND logic circuit, and the output end of the AND logic circuit is in signal connection with the input end of the timing switch sub-circuit.

As an alternative embodiment, the drive mechanism comprises a motor, and the signal detector is a position sensor for sensing a rotor position of the motor.

As an optional implementation manner, the driving mechanism includes a motor, the signal detector is a signal collector, and the signal collector is configured to collect a driving signal of the motor.

Compared with the prior art, the fault detection device disclosed by the invention is provided with the signal detector, the logic control circuit and the fault indicator, wherein the input end of the logic control circuit is respectively in signal connection with the limiting sensor and the output end of the signal detector, on one hand, the logic control circuit can acquire an operation state signal of the driving mechanism through the signal detector, and on the other hand, the logic control circuit can receive a trigger signal of the limiting sensor; the logic control circuit can combine the running state signal of the driving mechanism and the trigger signal of the limit sensor to output a control signal to control the fault indicator to make corresponding indication.

For example, when the logic control circuit receives a running state signal of the driving mechanism in normal operation and fails to receive a trigger signal of normal triggering of the limit sensor, the logic control circuit outputs a control signal to control the fault indicator to make an indication that the limit sensor is abnormal, so that a worker can find the abnormality of the limit sensor and timely deal with the abnormality, and the stalling damage of the driving mechanism of the parking assistant system is avoided.

In a second aspect, the present disclosure provides a parking assistance apparatus comprising: the device comprises a driving mechanism, a locking arm, a limit sensor and the fault detection device; wherein,

the limit sensor is used for detecting that the locking arm reaches a limit position, the driving mechanism is in driving connection with the locking arm, the driving mechanism is in signal connection with an input end signal of a signal detector contained in the fault detection device and a limit sensor respectively, and the limit sensor is in signal connection with an input end of a logic control circuit contained in the fault detection device.

As an alternative embodiment, the extreme positions comprise a first extreme position and a second extreme position, the first extreme position being an initial position of the locking arm, the second extreme position being a locking position of the locking arm;

the number of the limit sensors is two, one limit sensor is arranged at the first limit position, and the other limit sensor is arranged at the second limit position.

As an alternative embodiment, when the locking arm is in the initial position, the locking arm is in an unlocked state; when the locking arm is in the locking position, the locking arm is in a locked state.

As an alternative embodiment, the driving mechanism comprises a driver, a motor and a transmission assembly;

the output end of the logic control circuit and the two limit sensors are in signal connection with the control end of the driver, the signal output end of the driver is in signal connection with the control end of the motor, and the motor is in transmission connection with the locking arm through the transmission assembly.

As an optional implementation manner, the driver includes a logic circuit, a reference circuit, and a grounded driving chip, and an output end of the driving chip is in signal connection with a control end of the motor; the output ends of the two limit sensors and the logic control circuit are in signal connection with the input end of the driving chip through the logic circuit, and the reference circuit is connected with the reference voltage end of the driving chip.

As an optional implementation, the logic circuit includes two logic sub-circuits, and the number of the logic control circuits is two;

the output ends of one of the limit sensors and one of the logic control circuits are electrically connected with one input end of the driving chip through one of the logic sub-circuits;

the output ends of the other limit sensor and the other logic control circuit are electrically connected with the other input end of the driving chip through the other logic sub-circuit;

each logic sub-circuit comprises a first control sub-circuit and a second control sub-circuit, each limit sensor is electrically connected with the control end of the corresponding first control sub-circuit, and the input end of the first control sub-circuit is grounded; the output end of the second control sub-circuit is in signal connection with the input end of the driving chip;

the output end of each logic control sub-circuit is connected with the output end of the first control sub-circuit through the corresponding second control sub-circuit.

Compared with the prior art, the beneficial effect of the parking auxiliary equipment provided by the disclosure is the same as the beneficial effect of the fault detection device in the technical scheme, and the description is omitted here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 shows a logical structure diagram of a parking assistance apparatus of an embodiment of the present disclosure;

FIG. 2 illustrates a partial cross-sectional structural schematic view of a parking assist apparatus of an embodiment of the present disclosure;

fig. 3 shows a left side view schematic of the parking assistance apparatus of the embodiment of the present disclosure;

FIG. 4 illustrates a logical schematic of the connection of the drive mechanism to the logic control circuit and limit sensor of an embodiment of the present disclosure;

FIG. 5 is a logic diagram illustrating the connection of the driving mechanism to the logic control circuit and the limit sensor when there are two limit sensors in the embodiment of the present disclosure;

FIG. 6 is a logic diagram illustrating the connection of the driving mechanism to the logic control circuit and the position limit sensor when the logic sub-circuit includes the first control sub-circuit and the second control sub-circuit in the embodiment of the present disclosure;

FIG. 7 illustrates a schematic circuit diagram of a parking assist apparatus of an embodiment of the present disclosure;

FIG. 8 illustrates a schematic logic diagram of the connection of the fault detection device to the limit sensor of an embodiment of the present disclosure;

fig. 9 is a logic diagram illustrating a connection between the barrier detection device and the limit sensor when the determining sub-circuit includes a non-logic circuit and an and logic circuit according to an embodiment of the disclosure.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "based on" is "based, at least in part, on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description. It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, components, or mechanisms, and are not used for limiting the order or interdependence of the devices, components, or mechanisms.

Embodiments of the present disclosure provide a parking assistance apparatus, and referring to fig. 1 to 3, the parking assistance apparatus includes a limit sensor 100, a driving mechanism 200, a lock arm 300, and a malfunction detection device 400. The limit sensor 100 is used to detect that the lock arm 300 reaches the limit position. The drive mechanism 200 is drivingly connected to the locking arm 300. The extreme positions may comprise a first extreme position and a second extreme position, the first extreme position being an initial position of the locking arm and the second extreme position being a locked position of the locking arm.

The driving mechanism 200 is respectively connected with the input end signal of the fault detection device 400 and the limit sensor 100, and the limit sensor 100 is connected with the fault detection device 400 through a signal. The drive mechanism 200 is in signal connection with an input of the fault detection means 400.

For example, the fault detection apparatus 400 of the exemplary embodiment of the present disclosure may include a signal detector 410, a logic control circuit 420, and a fault indicator 430, wherein an input terminal of the logic control circuit 420 may be in signal connection with an output terminal of the signal detector 410, and an output terminal of the logic control circuit 420 is in signal connection with the fault indicator 430. In this case, the drive mechanism 200 is connected to the input signal of the signal detector 410 included in the failure detection device 400 and the limit sensor 100, respectively, and the limit sensor 100 is connected to the input signal of the logic control circuit 420 included in the failure detection device 400.

Referring to fig. 1, an output end of a logic control circuit 420 included in the fault detection apparatus 400 is in signal connection with the driving mechanism 200, when the limit sensor 100 has a fault, the logic control circuit 420 outputs a control signal to the fault indicator 430 on one hand, and outputs a control signal to the driving mechanism 200 on the other hand, and after receiving the control signal of the logic control circuit 420, the driving mechanism 200 stops operating, so that the driving mechanism 200 is prevented from being damaged due to locked rotor caused by continuous operation.

Referring to fig. 2 and 3, the parking assistance apparatus of the embodiment of the present disclosure further includes a base 500, the driving mechanism 200 is disposed in the base 500, the locking arm 300 is mounted on the base 500 through a connecting assembly 600 and is in transmission connection with the driving mechanism 200, and the driving mechanism 200 can drive the locking arm 200 to move between the initial position and the locking position. When the locking arm 300 is located at the initial position, the locking arm 300 is in an unlocked state, and at the moment, the parking space is in an open state, so that the vehicle can freely drive in. When the locking arm 300 is located at the locking position, the locking arm 300 is in a locking state, and when the locking arm 300 is in the locking state, the parking space is in a locking state, and the vehicle is prohibited from entering.

Illustratively, referring to FIG. 3, the locking arm 300 is movable in a rocking manner between the initial position and the locked position. The connecting assembly 600 is a rotational mounting such as a rotational bearing or spindle when the locking arm 300 is moved in a swinging manner between the initial position and the locked position. When the locking arm 300 swings downwards to reach a first set angle with the bottom surface of the base 500, the locking arm 300 is in an unlocking state, the parking space is open, and a vehicle can freely drive in; when the locking arm 300 swings upwards to an included angle a between the locking arm 300 and the bottom surface of the base 500 reaches a second set angle, the locking arm 300 is in a locking state, at the moment, the parking space is locked, and the vehicle is prohibited from driving in; wherein the first set angle may be 0 °, and the second set angle may be 90 °.

In one example, referring to fig. 1-3, drive mechanism 200 may include a driver 210, a motor 220, and a transmission assembly 230. The actuator 210 can send an actuation signal to the motor 220 to control the motor 220 to rotate in a forward or reverse direction, and the motor 220 is drivingly coupled to the locking arm 300 through the transmission assembly 230 to move the locking arm 300 between the initial position and the locked position. Wherein, the transmission assembly 230 may include a transmission member such as a transmission shaft, when the transmission assembly 230 includes the transmission shaft, the output shaft end of the motor 220 is connected to the transmission shaft, the transmission shaft is connected to one end of the locking arm, and when the motor 220 rotates, the output shaft end of the motor 220 drives the locking arm 300 to swing through the transmission shaft.

The number of the limit sensors 100 may be two, one limit sensor 100 is disposed at the initial position, and the other limit sensor 100 is disposed at the locking position. The two limit sensors 100 are both in signal connection with the control end of the driver 210, and the signal output end of the driver 210 is in signal connection with the control end of the motor 220.

When any one of the limit sensors 100 is triggered, the triggered limit sensor 100 sends a high level signal to the driver 210, so that the driver 210 controls the motor 220 to stop rotating.

For example, referring to fig. 1-3, when the motor 220 rotates forward, the motor 220 controls the locking arm 300 to move from the locking position to the initial position through the transmission assembly 230 until the locking arm 300 reaches the initial position, the position limiting sensor 100 in the initial position is triggered by the locking arm 300, and the position limiting sensor 100 sends a high-level signal to the control terminal of the driver 210, so that the driver 210 controls the motor 220 to stop rotating.

When the motor 220 rotates reversely, the motor 220 controls the locking arm 300 to move from the initial position to the locking position through the transmission assembly 230 until the locking arm 300 reaches the locking position, the limit sensor 100 in the locking position is triggered by the locking arm 300, and the limit sensor 100 sends a high-level signal to the control terminal of the driver 210, so that the driver 210 controls the motor 220 to stop rotating.

In one example, referring to fig. 1-3, when the number of the logic control circuits 420 is two, each limit sensor 100 is in signal connection with an input terminal of one of the logic control circuits 420. The output terminals of both logic control circuits 420 are connected with the control terminal of the driver 210 by signals. When the motor normally rotates and the failure detection device 400 finds that the position-limiting sensor 100 corresponding to the moving direction of the lock arm has a failure, the failure detection device 400 inputs a signal to the control terminal of the driver 210 through the logic control circuit 420 correspondingly connected to the position-limiting sensor 100 having the failure, so that the driver 210 controls the motor 220 to stop rotating.

In one example, referring to fig. 4 and 5, the driver 210 includes a logic circuit 211, a reference circuit 212, and a driver chip 213 connected to ground, and the driver chip 213 may be an AT8870 motor driver chip or other motor driver chips.

The reference circuit 212 is connected to a reference voltage terminal VREF of the driver chip 213. The reference circuit 212 may include a constant current source and a grounded capacitor, both of which are electrically connected to the reference voltage terminal of the driver chip 213 to provide the driver chip 213 with a reference voltage.

The output end of the driving chip 213 is connected with the control end of the motor 220 through signals. The output ends of the two limit sensors and the two logic control circuits 420 are in signal connection with the input end of the driving chip 213 through the logic circuit 211. The logic circuit 211 includes two logic sub-circuits. For ease of understanding, two limit sensors may be defined as first limit sensor 100A and second limit sensor 100B, two logic sub-circuits as first logic sub-circuit 211A and second logic sub-circuit 211B, and two logic control circuits 420 as first logic control circuit 420A and second logic control circuit 420B.

Referring to fig. 4 to 6, the output terminals of the first limit sensor 100A and the first logic control circuit 420A are electrically connected to the first input terminal IN1 of the driver chip 213 through the first logic sub-circuit 211A; the output terminals of the second limit sensor 100B and the second logic control circuit 420B are electrically connected to the second input terminal IN2 of the driver chip 213 through the second logic sub-circuit 211B.

Illustratively, each logic sub-circuit comprises a first control sub-circuit 2211 and a second control sub-circuit 2112, each limit sensor 100 is electrically connected to the control terminal of the first control sub-circuit 2111 included in the corresponding logic sub-circuit, and the input terminal of the first control sub-circuit 2111 is grounded; the output end of the second control sub-circuit 2112 is in signal connection with the input end of the driving chip 213; the output of each logic control circuit 420 is electrically connected to the output of the first control sub-circuit 2111 via a second control sub-circuit 2112 comprised by the respective logic sub-circuit.

In one example, referring to fig. 6 and 7, the first control sub-circuit 2111 of the first logic sub-circuit 211A includes a first transistor Q101, a first resistor R201, and a second resistor R301, and the first electrode of the first transistor Q101 is electrically connected to the gate of the first transistor Q101 through the second resistor R301 while being grounded; the first limit sensor 100A is connected with the gate of the first transistor Q101 through a first resistor R201; the second electrode of the first transistor Q101 is electrically connected to the first input terminal IN1 of the driving chip; the second control sub-circuit 2112 of the first logic sub-circuit 211A includes a main control chip U1 and a third resistor R401, and the first output terminal of the main control chip U1 is electrically connected to the gate of the transistor Q101 through the third resistor R401.

Taking the NMOS transistor as an example, when the motor rotates forward, the first output terminal of the main control chip U1 inputs a pulse signal to the first input terminal IN1 of the driving chip 213, and when the first limit sensor 100A connected to the gate of the first transistor Q101 is triggered, the first limit sensor 100A sends a high-level trigger signal to the first transistor Q101, so that the first transistor Q101 is turned on, and since the source of the first transistor Q101 is grounded, when the first transistor Q101 is turned on, a low-level signal is input to the first input terminal IN1 of the driving chip 213, so that the driving chip 213 controls the motor 220 to stop rotating.

When the motor rotates forward, when the fault detection device detects that the first limit sensor 100A connected to the gate of the first transistor Q101 has a fault, the first logic control circuit 420A connected to the first limit sensor 100A sends a high level signal to the main control chip U1, and after the main control chip U1 receives the high level signal, the first output end of the main control chip U1 outputs a low level signal, so that the driving chip 213 controls the motor 220 to stop rotating.

Similarly, the first control sub-circuit 2111 of the second logic sub-circuit 211B includes a second transistor Q102, a fourth resistor R202, and a fifth resistor R302, and the source of the second transistor Q102 is grounded and is also connected to the gate of the second transistor Q102 through the fifth resistor R302; the second limit sensor 100B is connected to the gate of the second transistor Q102 through a fourth resistor R202; the drain of the second transistor Q102 is electrically connected to the second input terminal IN2 of the driver chip; the second control sub-circuit 2112 of the second logic sub-circuit 211B includes a main control chip U1 and a sixth resistor R402, and the second output terminal of the main control chip U1 is electrically connected to the gate of the second transistor Q101 through the sixth resistor R402.

When the motor is reversely rotated, the second output terminal of the main control chip U1 inputs a pulse signal to the second input terminal IN2 of the driving chip 213, when the second limit sensor 100B connected to the gate of the second transistor Q102 is triggered, the second limit sensor 100B sends a high-level trigger signal to the second transistor Q102, so that the second transistor Q102 is turned on, the second source of the transistor Q102 is grounded, and when the second transistor Q102 is turned on, a low-level signal is input to the second input terminal IN2 of the driving chip 213, so that the driving chip 213 controls the motor 220 to stop rotating.

When the motor rotates reversely, when the fault detection device detects that the second limit sensor 100B connected to the gate of the second transistor Q102 sends a fault, the second logic control circuit 420B connected to the second limit sensor 100B sends a high level signal to the main control chip U1, and after the main control chip U1 receives the high level signal, the second output end of the main control chip U1 outputs a low level signal, so that the driving chip 213 controls the motor 220 to stop rotating.

The main control chip of the first logic sub-circuit 211A and the main control chip of the second logic sub-circuit 211B are the same main control chip, and the main control chip inputs a control signal to the driving chip 213 to control the forward rotation, the reverse rotation, or the shutdown of the motor 220.

Referring to fig. 1, a fault detection apparatus 400 of the disclosed embodiment includes:

the input end of the signal detector 410 is in signal connection with the driving mechanism 200;

the input end of the logic control circuit 420 is respectively in signal connection with the output ends of the limit sensor 100 and the signal detector 410;

and a fault indicator 430 in signal connection with an output of the logic control circuit 420.

Based on the above structure, the fault detection apparatus 400 of the present disclosure has a signal detector 410, a logic control circuit 420 and a fault indicator 430, wherein the input end of the logic control circuit 420 is respectively connected with the output ends of the limit sensor 100 and the signal detector 410 by signals, on one hand, the logic control circuit 420 can obtain the operation state signal of the driving mechanism 200 through the signal detector 410, and on the other hand, the logic control circuit 420 can receive the high level signal triggered by the limit sensor 100; the logic control circuit 420 combines the operating state signal of the driving mechanism 200 and the receiving condition of the trigger signal of the limit sensor 100 to output a control signal, and controls the fault indicator 430 to make a corresponding indication.

For example, when the logic control circuit 420 receives the operating state signal of the driving mechanism 200 in normal operation and fails to receive the high level signal triggered by the limit sensor 100, the logic control circuit 420 outputs a control signal to control the fault indicator 430 to indicate that the limit sensor 100 is abnormal, so that a worker can find the abnormality of the limit sensor 100 and timely deal with the abnormality, and the driving mechanism 200 of the parking assist system is prevented from being locked up and damaged.

Illustratively, when the limit sensor 100 fails and the driving mechanism 200 operates normally, the logic control circuit 420 receives a high-level signal indicating that the driving mechanism 200 is in a normal operating state and fails to receive the high-level signal triggered by the limit sensor 100, the logic control circuit 420 outputs a high-level control signal to control the fault indicator 430 to indicate that the limit sensor 100 is abnormal; similarly, when the limit sensor 100 is triggered to send a high level signal, and the driving mechanism 200 is also in a normal working state, the logic control circuit 420 receives the high level signal when the driving mechanism 200 is in a normal working state, and meanwhile, the logic control circuit 420 also receives the high level signal triggered by the limit sensor 100, and the logic control circuit 420 outputs a low level control signal to control the fault indicator 430 to make a normal indication of the limit sensor 100.

In one example, referring to fig. 8, the logic control circuit 420 includes a decision sub-circuit 421 and a timing switch sub-circuit 422; the input end of the judgment sub-circuit 421 is respectively connected with the output ends of the limit sensor 100 and the signal detector 410 by signals, the output end of the judgment sub-circuit 421 is connected with the input end of the timing switch sub-circuit 422 by signals, and the output end of the timing switch sub-circuit 422 is connected with the fault indicator 430 by signals.

Since the input terminal of the judgment sub-circuit 421 is in signal connection with the output terminals of the limit sensor 100 and the signal detector 410, respectively, the judgment sub-circuit 421 can output the judgment signal according to the operating state signal of the driving mechanism 200 and the trigger signal of the limit sensor 100. When the judgment sub-circuit 421 only receives the running state signal that the driving mechanism 200 is in normal operation and does not receive the trigger signal of the limit sensor 100, the judgment sub-circuit 421 outputs a first judgment signal, and the timing switch sub-circuit 422 triggers timing after receiving the first judgment signal; within the timing time preset by the timing switch sub-circuit 422, if the sub-circuit 421 is judged not to receive the trigger signal of the limit sensor 100, the timing switch sub-circuit 422 outputs a first control signal to control the limit sensor 100 to make an indication that the limit sensor 100 is abnormal; if the timing switch sub-circuit 422 receives the trigger signal of the limit sensor 100 within the preset timing time, the timing switch sub-circuit 422 outputs a second control signal to control the fault indicator 430 to indicate that the limit sensor 100 is normal. As another embodiment of this example, if the timing switch sub-circuit 422 determines that the sub-circuit 421 receives the trigger signal of the limit sensor 100 within the preset timing time, the timing switch sub-circuit 422 may directly interrupt the output of the first control signal, so that the fault indicator 430 does not indicate that the limit sensor 100 is abnormal.

In the above example, since the time for the driving mechanism 200 of the parking assistance apparatus to drive the locking arm 300 to move to the extreme position is relatively fixed, the timing time of the timing switch sub-circuit 422 can be set according to the time required by the driving mechanism 200 to drive the locking arm 300 to move to the extreme position, wherein the timing switch sub-circuit 422 can be selected from the existing timing switch circuits, such as the timing switch circuit based on 555 timer, etc.

In one example, referring to fig. 9, the determination sub-circuit 421 includes a not logic circuit 4211 and an and logic circuit 4212; the input end of the non-logic circuit 4211 is in signal connection with the limit sensor 100, the output end of the non-logic circuit 4211 is in signal connection with the first input end of the logic circuit 4212, the output end of the signal detector 410 is in signal connection with the second input end of the logic circuit 4212, and the output end of the logic circuit 4212 is in signal connection with the input end of the timing switch sub-circuit 422.

Referring to fig. 9, the position limit sensor 100 is in signal connection with a first input terminal of the logic circuit 4212 through the non-logic circuit 4211, and an output terminal of the signal detector 410 is in signal connection with a second input terminal of the logic circuit 4212, and since the and logic circuit 4212 needs both input terminals to be high level signals, the output is a high level signal. Therefore, when the driving mechanism 200 is in normal operation, so that the signal detector 410 outputs a high level signal to the second input terminal of the and logic circuit 4212, and the limit sensor 100 does not issue a trigger signal, so that the first input terminal of the and logic circuit 4212 is in a high level signal, the and logic circuit 4212 outputs a high level signal, so as to trigger the timing switch sub-circuit 422 to operate and enter timing; when the driving mechanism 200 is not operated, the signal detector 410 outputs a low level to the second input terminal of the and logic circuit 4212, and/or the limit sensor 100 is triggered, so that the first input terminal of the and logic circuit 4212 is in a low level signal, the and logic circuit 4212 outputs a low level signal, so that the timing switch sub-circuit 422 is interrupted, and the timing is stopped.

In one example, referring to fig. 1-9, the fault indicator 430 has an audible and visual alarm circuit that emits an audible and visual alarm when an abnormality occurs in the limit sensor 100; the fault indicator 430 may further have a communication circuit for transmitting fault information to the outside when an abnormality occurs in the limit sensor 100.

In one example, referring to fig. 1-9, the signal detector 410 is a position sensor for sensing a rotor position of the motor 220. The position sensor senses the position of the rotor of the motor 220, and compares the sensed position of the rotor of the motor 220 with the theoretically reached position of the rotor of the driving mechanism 200 in the normal working state, so as to judge whether the driving mechanism 200 is in the normal working state.

In another example, referring to fig. 1 to 9, the driving mechanism 200 includes a motor 220, and the signal detector 410 is a signal collector for collecting a driving signal of the motor 220, so as to determine whether the driving mechanism 200 is in a normal operating state according to the driving signal.

In summary, the fault detection device 400 of the present embodiment can output a control signal to control the fault indicator 430 to indicate that the limit sensor 100 is abnormal when the limit sensor 100 sends a fault according to the operating state signal of the driving mechanism 200 and the trigger signal of the limit sensor 100, so that the worker can find the abnormality of the limit sensor 100 and timely deal with the abnormality, thereby avoiding the driving mechanism 200 of the parking assist system from being locked and damaged.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims (10)

1. A failure detection device for a parking aid having a drive mechanism, a locking arm, and a limit sensor for detecting the reaching of a limit position of the locking arm, the drive mechanism being drivingly connected to the locking arm; the failure detection device includes:

the input end of the signal detector is in signal connection with the driving mechanism;

the input end of the logic control circuit is respectively in signal connection with the limiting sensor and the output end of the signal detector;

and a fault indicator in signal connection with an output of the logic control circuit.

2. The fault detection device of claim 1, wherein the logic control circuit includes a decision sub-circuit and a timing switch sub-circuit;

the input end of the judging sub-circuit is respectively in signal connection with the limiting sensor and the output end of the signal detector, the output end of the judging sub-circuit is in signal connection with the input end of the timing switch sub-circuit, and the output end of the timing switch sub-circuit is in signal connection with the fault indicator.

3. The fault detection device of claim 2, wherein the decision sub-circuit comprises a non-logic circuit and an and logic circuit;

the input end of the non-logic circuit is in signal connection with the limit sensor, the output end of the non-logic circuit is in signal connection with the first input end of the AND logic circuit, the output end of the signal detector is in signal connection with the second input end of the AND logic circuit, and the output end of the AND logic circuit is in signal connection with the input end of the timing switch sub-circuit.

4. A fault detection device according to any of claims 1 to 3, wherein the drive mechanism comprises an electric motor and the signal detector is a position sensor for sensing the position of a rotor of the electric motor.

5. The fault detection device according to any one of claims 1 to 3, wherein the driving mechanism includes a motor, the signal detector is a signal collector, and the signal collector is configured to collect a driving signal of the motor.

6. A parking assistance apparatus, characterized by comprising: a drive mechanism, a lock arm, a limit sensor, and the failure detection device according to any one of claims 1 to 5; wherein,

the limit sensor is used for detecting that the locking arm reaches a limit position, the driving mechanism is in driving connection with the locking arm, the driving mechanism is in signal connection with an input end signal of a signal detector contained in the fault detection device and a limit sensor respectively, and the limit sensor is in signal connection with an input end of a logic control circuit contained in the fault detection device.

7. The parking assist apparatus according to claim 6, wherein the extreme positions include a first extreme position and a second extreme position, the first extreme position being an initial position of the lock arm, the second extreme position being a locked position of the lock arm;

the number of the limit sensors is two, one limit sensor is arranged at the first limit position, and the other limit sensor is arranged at the second limit position.

8. A parking assistance apparatus as claimed in claim 7, wherein said drive mechanism includes a drive, a motor and a transmission assembly;

the output end of the logic control circuit and the two limit sensors are in signal connection with the control end of the driver, the signal output end of the driver is in signal connection with the control end of the motor, and the motor is in transmission connection with the locking arm through the transmission assembly.

9. The parking assist apparatus according to claim 8, wherein the driver includes a logic circuit, a reference circuit, and a driver chip connected to ground, an output terminal of the driver chip being signal-connected to a control terminal of the motor;

the output ends of the two limit sensors and the logic control circuit are in signal connection with the input end of the driving chip through the logic circuit, and the reference circuit is connected with the reference voltage end of the driving chip.

10. A parking assistance apparatus according to claim 9, wherein said logic circuit includes two logic sub-circuits, said logic control circuit being two;

the output ends of one of the limit sensors and one of the logic control circuits are electrically connected with one input end of the driving chip through one of the logic sub-circuits;

the output ends of the other limit sensor and the other logic control circuit are electrically connected with the other input end of the driving chip through the other logic sub-circuit;

each logic sub-circuit comprises a first control sub-circuit and a second control sub-circuit, each limit sensor is electrically connected with the control end of the corresponding first control sub-circuit, and the input end of the first control sub-circuit is grounded; the output end of the second control sub-circuit is in signal connection with the input end of the driving chip;

the output end of each logic control sub-circuit is connected with the output end of the first control sub-circuit through the corresponding second control sub-circuit.

Images