Crane parking alarm system and control method

Abstract

The invention discloses a crane parking alarm system which comprises a first circuit, a starting lock fuse, a starting lock, a power supply relay, a first hand brake detection switch, a vehicle body controller and a display which are sequentially connected through an in-vehicle power supply, and a vehicle body controller fuse and a display fuse are arranged between the vehicle body controller and the starting lock and between the display and the starting lock; the system further comprises a second circuit, a starting lock fuse, a hand brake non-pulling detection relay, a second hand brake detection switch, a vehicle body controller and a displayer are sequentially connected through an in-vehicle power source, and the hand brake non-pulling detection relay is connected with the power source relay through a power transmission line connected with the starting lock in parallel and grounded through a main driving door control detection switch. And the vehicle body controller is connected with a tilt angle sensor. Signals in the crane are detected, whether the position of the hand brake is correct or not is judged according to the use state of the crane, and if not, a driver is reminded of correction in time through sound-light alarm according to the danger degree, so that the safety of crane hand brake operation is improved.

Description

Technical Field

[0001] This invention relates to the field of crane parking technology, and in particular to a crane parking alarm system and control method. Background Technology

[0002] With the development of crane technology, users are increasingly demanding higher standards for operational safety, user-friendliness, and intelligence. The parking brake, also known as a car handbrake, is a crucial safety device used in automobiles to stabilize the vehicle after it has come to a stop, preventing accidents caused by the vehicle rolling, especially when parked on a slope. The handbrake system of wheeled cranes functions similarly to that in the automotive industry, and is mostly equipped with a mechanical handbrake. During use, misoperation of the mechanical handbrake mainly occurs in two situations: First, forgetting to engage the handbrake when parking, which can seriously lead to a rolling accident; second, forgetting to release the handbrake after starting the vehicle, causing excessive wear or even direct damage to the handbrake, resulting in economic losses and safety hazards. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the prior art, the first objective of this invention is to provide a crane parking alarm system; The second objective is to provide an alarm control method based on the aforementioned crane parking alarm system.

[0004] Technical Solution: The crane parking alarm system provided by this invention includes a first circuit, in which the vehicle's power supply is sequentially connected to the starter lock fuse, the starter lock, a power relay, a first handbrake detection switch, the vehicle body controller, and a display. A vehicle body controller fuse and a display fuse are provided between the vehicle body controller and the starter lock. The system also includes a second circuit, in which the vehicle's power supply is sequentially connected to the starter lock fuse, a handbrake not engaged detection relay, a second handbrake detection switch, the vehicle body controller, and the display. The handbrake not engaged detection relay is connected to the power relay via a power line in parallel with the starter lock and is grounded via the driver's door control detection switch. The vehicle body controller is connected to a tilt sensor.

[0005] Crane parking alarm control method based on the above crane parking alarm system: When the car is parked and the handbrake is not engaged: When the ignition lock is powered on, the power relay operates, supplying power to the body controller and display. When the body controller detects a vehicle speed of 0, and the first set value < tilt sensor value ≤ second set value, if the body controller does not detect the first handbrake detection switch signal after a delay, the handbrake is not engaged, triggering a level one alarm state. If, at this time, the body controller detects a door opening signal or the tilt sensor value is greater than the second set value, a level two alarm state is triggered. The alarm state is deactivated when the handbrake is engaged. When the engine is off and the power is off, and the handbrake is not engaged: When the ignition lock is disengaged, the first handbrake detection switch is disengaged, and the second handbrake detection switch is closed. When the door is opened, the driver's side door control detection switch is closed, the handbrake not engaged detection relay is activated, and power is supplied to the power relay through the power line. The body controller triggers a three-level alarm state by detecting the first handbrake detection switch and the driver's side door control detection switch.

[0006] Furthermore, when the handbrake is not engaged while the engine is running, if the body controller receives a power take-off request, the engine speed will be greater than the third set value. If the handbrake is not engaged, a level four alarm will be triggered. Once the handbrake is engaged, the body controller will control the power take-off valve to operate.

[0007] Furthermore, the first-level alarm state is a flashing alarm on the display, accompanied by an in-vehicle audible alarm; the second-level and third-level alarm states are a flashing alarm on the display and an in-vehicle audible alarm, with a higher frequency than the first-level alarm state, accompanied by an external audible alarm; the fourth-level alarm state is a power take-off request indicator light alarm, prompting a check of the handbrake status.

[0008] Beneficial effects: Compared with the prior art, the significant advantages of this invention are: it can protect the vehicle from rolling when the handbrake is not engaged, providing tiered audible and visual alarms to prevent the vehicle from rolling away and causing safety hazards, thus improving the safety of crane operation; when the vehicle is in a power-off state, if the handbrake is not engaged and the driver's door is opened (both conditions are indispensable, otherwise, the vehicle will frequently be automatically powered on), the parking alarm device can be automatically triggered to provide audible and visual alarms and Chinese display alarm prompts, further improving the level of user-friendliness; when the vehicle is in operation, an alarm prompt is added for failure to engage the load due to the handbrake not being engaged, which can further improve the convenience of troubleshooting crane malfunctions caused by operation. Attached Figure Description

[0009] Figure 1 This is the system circuit diagram of the present invention. Detailed Implementation

[0010] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] like Figure 1The crane parking alarm system shown includes a first circuit, which is connected in sequence from the vehicle's power supply to the starter lock fuse 1, starter lock 2, power relay 3, first handbrake detection switch 4, body controller 5, and display 6. The body controller 5 and display 6 are connected to the starter lock 2 by a body controller fuse 7 and a display fuse 8. The system also includes a second circuit, which is connected in sequence from the vehicle's power supply to the starter lock fuse 1, handbrake not engaged detection relay 9, second handbrake detection switch 10, body controller 5, and display 6. The handbrake not engaged detection relay 9 is connected to the power relay 3 through a power line in parallel with the starter lock 2 and is grounded through the driver's door control detection switch 11. The body controller 5 is connected to a tilt sensor 12.

[0012] A crane parking alarm control method based on the above-mentioned crane parking alarm system.

[0013] The first scenario is when the handbrake is not engaged during a temporary stop: When the ignition lock 2 is powered on, the power relay 3 operates, supplying power to the body controller 5 and the display 6. When the body controller 5 detects a vehicle speed of 0, and the first set value < tilt sensor value ≤ second set value, if the body controller 5 does not detect the first handbrake detection switch 4 signal after a delay (this delay time is adjustable, allowing the driver time to engage the handbrake after parking), the handbrake is not engaged, triggering a first-level alarm state. The display flashes an alarm, and an audible alarm sounds inside the vehicle. If, at this time, the body controller 5 detects a door opening signal or the tilt sensor value exceeds the second set value, a second-level alarm state is triggered. The display flashes an alarm, and an audible alarm sounds inside the vehicle at a higher frequency than the first-level alarm state. Simultaneously, an external audible alarm sounds to alert outsiders and prevent the vehicle from rolling away, thus avoiding safety hazards. The alarm state exits when the handbrake is engaged.

[0014] Based on the above situation, when the handbrake is not engaged while the engine is running, if the body controller 5 receives a power take-off request, the engine speed will be greater than the third set value. If the handbrake is not engaged, a level four alarm state will be triggered, and the power take-off request indicator light will alarm. The color of the power take-off indicator light will be the same as the symbol of the power take-off indicator light, with only a color difference. The system will also prompt you to check the handbrake status. After the handbrake is engaged, the body controller 5 will control the power take-off valve to work. After receiving the power take-off detection switch, the display will illuminate the power take-off indicator light.

[0015] The second scenario is when the engine is off and the power is off, but the handbrake is not engaged: When the start lock 2 is disengaged, the first handbrake detection switch 4 is disengaged, and the second handbrake detection switch 10 is closed. When the door is opened, the driver's side door control detection switch 11 is closed, the handbrake not engaged detection relay 9 is activated, and power is supplied to the power relay 3 through the power transmission line. The body controller 5 triggers a three-level alarm state by detecting the first handbrake detection switch 4 and the driver's side door control detection switch 11. The display flashes an alarm, and an in-vehicle audible alarm is triggered at a frequency higher than that of the first-level alarm state. At the same time, an external audible alarm is triggered to remind outsiders to prevent the vehicle from rolling and causing a safety hazard. Once the handbrake is engaged, the alarm state is immediately deactivated.

[0016] The third scenario involves the vehicle being in motion and the handbrake being forgotten to be released: If the vehicle speed is greater than 0, the handbrake detection switch is closed, and the vehicle controller receives the handbrake signal. Although the display will illuminate the handbrake indicator light, the user may not notice. If the vehicle is still in motion, the brake pads will wear, overheat, or even be damaged. This patent addresses this by having the vehicle controller detect a vehicle speed greater than 0 and the handbrake engaged, triggering an audible and visual alarm on the display and displaying a text prompt such as "Driving status, please release the parking switch!" The alarm status immediately exits once the handbrake is released.

Claims

1. A crane parking alarm system, characterized in that: The circuit includes a first circuit, which is connected in sequence by the vehicle power supply to the start lock fuse (1), start lock (2), power relay (3), first handbrake detection switch (4), body controller (5), and display (6). The body controller (5) and display (6) are connected to the start lock (2) by a body controller fuse (7) and a display fuse (8). The circuit also includes a second circuit, which is connected in sequence by the vehicle power supply to the start lock fuse (1), handbrake not engaged detection relay (9), second handbrake detection switch (10), body controller (5), and display (6). The handbrake not engaged detection relay (9) is connected to the power relay (3) through a power line in parallel with the start lock (2) and grounded through the driver's door control detection switch (11). The body controller (5) is connected to a tilt sensor (12).

2. A crane parking alarm control method based on the crane parking alarm system of claim 1, characterized in that: When the car is parked and the handbrake is not engaged: When the start lock (2) is powered on, the power relay (3) works to supply power to the body controller (5) and the display (6). When the body controller (5) detects that the vehicle speed is 0, the first set value < the tilt sensor value ≤ the second set value. If the body controller (5) does not detect the first handbrake detection switch (4) signal after a delay, the handbrake is not pulled, triggering the first-level alarm state. If at this time, the body controller (5) detects the door opening signal or the tilt sensor value is greater than the second set value, triggering the second-level alarm state. The alarm state is exited after the handbrake is pulled up. When the engine is off and the power is off, and the handbrake is not engaged: When the start lock (2) is disengaged, the first handbrake detection switch (4) is disengaged, and the second handbrake detection switch (10) is closed; when the door is opened, the driver's side door control detection switch (11) is closed, the handbrake not engaged detection relay (9) is activated, and the power supply relay (3) is powered through the power transmission line. The body controller (5) triggers a three-level alarm state by detecting the first handbrake detection switch (4) and the driver's side door control detection switch (11).

3. The crane parking alarm control method according to claim 2, characterized in that, When the handbrake is not engaged while the engine is running, if the body controller (5) receives a power take-off request, the engine speed will be greater than the third set value. If the handbrake is not engaged, a level four alarm will be triggered. After the handbrake is engaged, the body controller (5) will control the power take-off valve to work.

4. The crane parking alarm control method according to claim 3, characterized in that, The first-level alarm state is characterized by a flashing display and an in-vehicle audible alarm; the second-level and third-level alarm states are characterized by a flashing display and an in-vehicle audible alarm, with a higher frequency than the first-level alarm state, along with an external audible alarm; the fourth-level alarm state is characterized by a power take-off request indicator light flashing and a prompt to check the handbrake status.

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