Self-learning protection electromagnetic main switch for vehicle and control method thereof

Abstract

The invention belongs to the field of vehicle switch control, and provides a self-learning protection electromagnetic main switch for a vehicle and a control method thereof, and the self-learning protection electromagnetic main switch comprises an electromagnetic main switch body and a control circuit connected with the electromagnetic main switch body. The control circuit comprises an input detection module and a voltage comparison module. The input detection module is connected with a current sensor of the electromagnetic main switch and the seat pressure switch. And the voltage comparison module is respectively connected with a power supply and an output driver of the control circuit so as to monitor a comparison result between the input power supply voltage and the standard under-voltage value and between the output power supply voltage and the standard under-voltage value. When the vehicle runs or is parked for a long time, the actual working states of the vehicle and a driver are judged by collecting power supply current, a control switch, an ignition switch, a starting signal, an engine revolution signal, a whole vehicle voltage signal, a driver off-seat signal and the like; the electromagnetic switch coil is controlled to keep a pull-in state, and power supply of a vehicle main circuit is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle switch control, and particularly relates to a self-learning protection electromagnetic master switch for vehicles and a control method thereof. BACKGROUND The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0002] The electromagnetic master switch for vehicles is connected in series between a storage battery and a vehicle power supply, and is used for connecting and cutting off the main power supply circuit of vehicle electrical appliances. The traditional electromagnetic master switch is composed of an electromagnetic coil, a core, a spring, and switch contacts. When the electromagnetic coil is powered, the core is attracted, and the switch contacts are connected to the main circuit. When the electromagnetic coil is powered off, the magnetic force disappears, the core is reset by the spring, the switch contacts are reset, and the main circuit is cut off. Since the electromagnetic master switch has only one attracting coil, the switch contacts have a large volume, and the attracting needs to overcome the tension of the reset spring. Therefore, the coil has a large working current in consideration of the functions of attracting and maintaining.

[0003] The master switch for vehicle electrical appliance power supply must be continuously powered on when any electrical appliance of the vehicle is working. When the vehicle driver stops the vehicle, the power supply line of the electromagnetic master switch must be cut off to prevent the continuous power-on of the electromagnetic master switch coil. In actual situations, the vehicle driver often forgets to cut off the power supply line of the electromagnetic master switch when only the ignition switch is turned off, resulting in the low-voltage storage battery of the long-term parked vehicle being discharged and unable to start. SUMMARY

[0004] To solve the above problems, the present application provides a self-learning protection electromagnetic master switch for vehicles and a control method thereof. The present application detects signals, compares load currents and power supply voltages, and outputs a control power-on state of the electromagnetic master switch coil to realize under-voltage early warning and automatic control of the on-off of the vehicle electromagnetic master switch in the running or long-term parking state of the vehicle.

[0005] According to some embodiments, the first aspect of the present application provides a self-learning protection electromagnetic master switch for vehicles, which adopts the following technical solutions: A self-learning protection electromagnetic master switch for vehicles, comprising an electromagnetic master switch body and a control circuit connected thereto. The control circuit comprises an input detection module and a voltage comparison module, and the input detection module is connected with a current sensor and a seat pressure switch of the electromagnetic master switch. The voltage comparison module is connected with a power supply and an output drive of the control circuit to monitor the comparison results of the input power supply voltage and the output power supply voltage with a standard under-voltage value.

[0006] Further, the input detection module is configured to detect a switch signal, an ignition signal, a start signal, and an engine speed signal.

[0007] Further, the voltage comparison module is further connected with an under-voltage indicator, and outputs an under-voltage warning signal to control the under-voltage indicator to light up when the comparison result is less than a standard under-voltage value.

[0008] Further, the power supply of the control circuit is connected with the input detection module and the output drive module, respectively. The output drive module is configured to turn on and turn off the power supply of the electromagnetic coil to control the electromagnetic master switch.

[0009] Further, the input detection module is connected with a current sensor of the electromagnetic master switch and a seat pressure switch, respectively, to detect a load current and a seat pressure switch signal. The seat pressure switch signal is closed, indicating that the driver is sitting on the seat; and the seat pressure switch signal is open, indicating that the driver is leaving the seat.

[0010] Further, the input power supply voltage refers to the voltage EC + of the vehicle storage battery, and the output power supply voltage refers to the output voltage EC + after the electromagnetic master switch.

[0011] According to some embodiments, the second aspect of the present application provides a control method of a self-learning protection electromagnetic master switch for vehicles, which adopts the following technical solution: The control method of the self-learning protection electromagnetic master switch for vehicles based on the first aspect comprises the following steps: When the seat pressure switch is open and there is a switch signal input, but none of the ignition signal, the start signal, and the engine speed signal is input, it is determined that the vehicle is in a static state. When the load current is detected for the first time to be less than the set current value, the electromagnetic master switch is cut off after a delay of N minutes; when the load current is detected for the Nth time to be less than the set current value, the electromagnetic master switch is cut off in turn with a delay of 1 minute less each time until the minimum delay of 1 minute; and the comparison result of the input power supply voltage and the output power supply voltage with the standard under-voltage value is detected when the delay time exceeds the set threshold. If the comparison result is less than the standard under-voltage value, the electromagnetic master switch is cut off; otherwise, the load current is continuously detected.

[0012] Further, when the seat pressure switch is closed and there is a switch signal input, any one of the ignition signal, the start signal, and the engine speed signal is input, it is determined that the vehicle is in a running state, and the electromagnetic master switch is not actively cut off. During the running process, if the voltage comparison module detects an under-voltage condition, the under-voltage indicator lights up.

[0013] According to some embodiments, a third aspect of the present application provides a computer readable storage medium.

[0014] A computer readable storage medium, having stored thereon a computer program, which when executed by a processor implements the steps of the control method of the self-learning protection electromagnetic master switch for vehicle according to the second aspect.

[0015] According to some embodiments, a fourth aspect of the present application provides a computer device.

[0016] A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the control method of the self-learning protection electromagnetic master switch for vehicle according to the second aspect when executing the program.

[0017] Compared with the prior art, the present application has the following beneficial effects: The present application adds a current detection and under-voltage protection control circuit to the electromagnetic master switch, collects power current, control switch, ignition switch, start signal, engine revolution signal, vehicle voltage signal, and driver off signal, judges the actual working state of the vehicle and the driver, controls the electromagnetic switch coil to keep in an attracted state when the vehicle is in an ignition or running state, and guarantees the power supply of the vehicle main circuit.

[0018] When the vehicle is running and the vehicle voltage is under-voltage, only an under-voltage warning signal is output, and the electromagnetic master switch coil power supply is not actively cut off, guaranteeing the normal and emergency operation of the vehicle; when the vehicle is in a stationary state and the driver is off, and the electromagnetic master switch coil power supply is forgotten to be turned off, self-learning and decreasing delay are performed through current detection, the real-time power supply voltage value is compared with the standard value when the detection time is greater than 20 minutes, the electromagnetic master switch coil power supply is automatically cut off when the detection voltage is lower than the set under-voltage value, and the problem of low-voltage battery power loss in the case of forgetting to turn off the power master switch and long-term parking is effectively eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings constituting a part of the specification of the present application are used to provide a further understanding of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application.

[0020] Figure 1 is a circuit principle diagram of the self-learning protection electromagnetic master switch for vehicle in the embodiment of the present application; Figure 2 is a flowchart of the control method of the self-learning protection electromagnetic master switch for vehicle in the embodiment of the present application. DETAILED DESCRIPTION

[0021] The application will be further described below in connection with the drawings and embodiments.

[0022] It should be noted that the following detailed description is illustrative only, and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0023] It is also important to note that the use of the term "embodiment" or "example" herein does not indicate a recommendation, recommendation or limitation. As used herein, the singular form "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, it should be understood that the use of the term "comprising" and / or "including" in this specification indicates that the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] The embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0025] Embodiment one As shown in the figure, the embodiment provides a self-learning protection electromagnetic master switch for vehicles, which comprises an electromagnetic master switch body 1 and a control circuit 2 connected thereto. Figure 1 The electromagnetic master switch body 1 contains a current sensor, an electromagnetic coil, a core, a spring, a switch contact and the like. The electromagnetic coil is energized to attract the core, which drives the switch contact to connect the main circuit. When the electromagnetic coil is de-energized, the magnetic force disappears, and the core is reset by the spring. The switch contact is reset, and the main circuit is cut off. The mechanical part is the same as the conventional electromagnetic master switch. The control circuit 2 contains an input detection module, a voltage comparison module, an output drive module and an input power supply. The input detection module collects signals such as seat pressure switch signal, load current, input power supply voltage, switch ACC, ignition ON, start START, engine RPM and the like, which are used to judge the actual working state of the vehicle.

[0026] The voltage comparison module compares the input power supply voltage, the output power supply voltage and the internal standard under-voltage voltage value, and outputs an under-voltage warning signal to drive the indicator light according to the actual working state of the vehicle, and provides a driving signal for the output drive module. The input power supply voltage refers to the voltage EC + of the vehicle storage battery, and the output power supply voltage refers to the EC + output voltage after the electromagnetic master switch. The output drive module is used to connect and disconnect the power supply of the electromagnetic coil, and realizes the control of the electromagnetic master switch.

[0027]

[0028] ​The control circuit comprises an input detection module and a voltage comparison module, the input detection module is connected with the current sensor of the electromagnetic master switch and the seat pressure switch respectively; The voltage comparison module is connected with the power supply of the control circuit and the output drive respectively to monitor the comparison result of the input power voltage and the output power voltage with the standard under-voltage value.

[0029] The input detection module is used to detect the switch signal, the ignition signal, the starting signal and the engine speed signal.

[0030] The voltage comparison module is also connected with the under-voltage indicator, when the comparison result is less than the standard under-voltage value, the under-voltage warning signal is output to control the under-voltage indicator to light up.

[0031] The power supply of the control circuit is connected with the input detection module and the output drive module respectively; The output drive module is used to turn on and off the power supply of the electromagnetic coil to realize the control of the electromagnetic master switch.

[0032] The input detection module is connected with the current sensor of the electromagnetic master switch and the seat pressure switch respectively to detect the load current and the seat pressure switch signal; The seat pressure switch signal is closed, which indicates that the driver is sitting on the seat; the seat pressure switch signal is open, which indicates that the driver leaves the seat.

[0033] Embodiment two The embodiment provides a control method of a self-learning protection electromagnetic master switch for vehicles, comprising: When the seat pressure switch is open and there is a switch signal input, but the ignition signal, the starting signal and the engine speed signal are not input, it is determined that the vehicle is in a static state; When the load current is detected for the first time to be less than the set current value, the electromagnetic master switch is cut off after N minutes of delay, when the load current is detected for the Nth time to be less than the set current value, the electromagnetic master switch is cut off in turn with 1 minute of decrease until 1 minute of minimum; the comparison result of the input power voltage and the output power voltage with the standard under-voltage value is detected when the delay time exceeds the set threshold value; If the comparison result is less than the standard under-voltage value, the electromagnetic master switch is cut off, otherwise, the load current is continuously detected.

[0034] When the seat pressure switch is closed and there is a switch signal input, any one of the ignition signal, the starting signal and the engine speed signal is input, it is determined that the vehicle is in a running state, and the electromagnetic master switch is not actively cut off; If the voltage comparison module detects an under-voltage condition during the running process, the under-voltage indicator lights up.

[0035] In the specific example, as Figure 2As shown, the method described in the embodiment is illustrated by an example, and the specific process is as follows: Input detection circuit: when the ACC switch has an input signal, the ignition is ON, the start is START, and any one of the engine RPM has an input signal, it is judged that the vehicle is in running state, the electromagnetic coil is kept in continuous power supply state, and the electromagnetic coil power supply is not actively cut off. If the detection is lower than the under-voltage condition, the voltage comparison circuit only lights up the under-voltage indicator for early warning, and ensures the vehicle power supply and normal operation of the vehicle; Input detection circuit: when the ACC switch has an input signal, the ignition is ON, the start is START, and any one of the engine RPM has an input signal, it is judged that the vehicle is in running state, the electromagnetic coil is kept in continuous power supply state, and the electromagnetic coil power supply is not actively cut off. If the detection is lower than the under-voltage condition, the voltage comparison circuit only lights up the under-voltage indicator for early warning, and ensures the vehicle power supply and normal operation of the vehicle; When the output circuit actively disconnects the electromagnetic switch coil power supply, the ACC switch is powered on or the ignition is ON, the system is reset, and the initial state is restored.

[0036] When the vehicle is in static state and the seat pressure switch signal shows that the driver is away from the seat (no ignition and running signal), a: current detection function, when the load current is detected for the first time <1A, the electromagnetic master switch is cut off after 30 minutes; when the load current is detected for the second time <1A, the electromagnetic master switch is cut off after 30-1 minutes; when the load current is detected for the Nth time <1A, the electromagnetic master switch is cut off after 1 minute, and the process is repeated until the minimum 1 minute; b: voltage detection function, the delay time is >20 minutes, and the vehicle power voltage is detected in real time. When the 12V vehicle is <11.5V and the 24V vehicle is <23.5V, the control circuit actively disconnects the electromagnetic switch coil power supply, the electromagnetic switch contact cuts off the vehicle power supply, and prevents the low-voltage storage battery from being continuously discharged for a long time.

[0037] It can be understood that the voltage values and delay times mentioned in the above method process are all examples, and different threshold values can be set according to different vehicles.

[0038] The embodiment can also achieve accurate control through the following control logic. The control circuit detects the working state of the vehicle in real time, and different control strategies are adopted according to different states. When the vehicle is running, the low-voltage state of the vehicle can be displayed. When the vehicle is static, the current and voltage are synchronously detected. The self-learning delay can be reduced, the low-voltage state can be detected and the electromagnetic master switch can be automatically cut off, thereby prolonging the service life of the vehicle-mounted low-voltage storage battery.

[0039] Embodiment three The embodiment provides a computer readable storage medium, which stores a computer program, and the program is executed by a processor to implement the steps in the control method of the vehicle self-learning protection electromagnetic master switch according to the above embodiment two.

[0040] Embodiment four The embodiment provides a computer device, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor. When the processor executes the program, the steps in the control method of the vehicle self-learning protection electromagnetic master switch according to the above embodiment two are implemented.

[0041] Those skilled in the art should understand that the embodiments of the present application can provide a method, a system or a computer program product. Therefore, the present application can take the form of a hardware embodiment, a software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer usable program code.

[0042] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system) and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The function specified in one flow or multiple flows and / or blocks Figure 1 The device that implements the function specified in one flow or multiple flows and / or blocks.

[0043] These computer program instructions can also be stored in a computer readable storage medium, which can guide the computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer readable storage medium produce a product including instruction devices, which implement the functions specified in the flowcharts and / or block diagrams. Figure 1 The function specified in one flow or multiple flows and / or blocks Figure 1the function specified in the one or more blocks.

[0044] These computer program instructions can also be loaded into a computer or other programmable data processing devices, so that a series of operational steps are performed on the computer or other programmable data processing devices to generate a computer implemented process, so that the instructions executed on the computer or other programmable data processing devices provide a process for implementing the flow Figure 1 the flow or flows and / or blocks Figure 1 the steps of the function specified in the one or more blocks.

[0045] Those of ordinary skill in the art can understand that all or part of the flow of the above-mentioned embodiment method can be completed by computer program instructions to instruct related hardware, and the program can be stored in a computer readable storage medium. When the program is executed, it can include the flow of the above-mentioned embodiment of each method. The storage medium can be a magnetic disc, an optical disc, a read-only memory (ROM) or a random access memory (RAM), etc.

[0046] Although the specific embodiments of the present application are described above with reference to the drawings, it is not a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications or changes made on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.

Claims

1. A self-learning protection electromagnetic master switch for vehicles, characterized in that, The electromagnetic master switch body and a control circuit connected therewith are included. The control circuit includes an input detection module and a voltage comparison module. The voltage comparison module is connected with the power supply and the output drive of the control circuit to monitor the comparison result of the input power voltage and the output power voltage with the standard under-voltage value.

2. A self-learning protective electromagnetic master switch for vehicles as claimed in claim 1, wherein, The input detection module is used to detect the switch signal, the ignition signal, the start signal and the engine speed signal.

3. A self-learning protective electromagnetic master switch for vehicles as claimed in claim 1, wherein, The voltage comparison module is also connected with the under-voltage indicator, and outputs an under-voltage warning signal to control the under-voltage indicator to light up when the comparison result is less than the standard under-voltage value.

4. A self-learning protective electromagnetic master switch for vehicles as claimed in claim 1, wherein, The power supply of the control circuit is connected with the input detection module and the output drive module. The output drive module is used to turn on and off the power supply of the electromagnetic coil to realize the control of the electromagnetic master switch.

5. A self-learning protective electromagnetic master switch for vehicles as claimed in claim 1, wherein, The input detection module is connected with the current sensor and the seat pressure switch of the electromagnetic master switch to detect the load current and the seat pressure switch signal. The seat pressure switch signal is closed, indicating that the driver is sitting on the seat. The seat pressure switch signal is open, indicating that the driver has left the seat.

6. A self-learning protective electromagnetic master switch for vehicles as claimed in claim 1, wherein, The input power supply voltage refers to the voltage EC of the vehicle storage battery + , and the output power supply voltage refers to the EC + output voltage after the electromagnetic master switch.

7. A control method for a self-learning protection electromagnetic master switch for vehicles according to any one of claims 1 to 6, characterized in that, The program is executed by the processor to realize the steps in the control method of the self-learning protection electromagnetic master switch for vehicles according to any one of claims 7-8. The processor executes the program to realize the steps in the control method of the self-learning protection electromagnetic master switch for vehicles according to any one of claims 7-8. The program is executed by the processor to realize the steps in the control method of the self-learning protection electromagnetic master switch for vehicles according to any one of claims 7-8. The processor executes the program to realize the steps in the control method of the self-learning protection electromagnetic master switch for vehicles according to any one of claims 7-8. ​ 8. The control method of a self-learning protective electromagnetic master switch for vehicles according to claim 7, characterized by, ​ ​ 9. A computer readable storage medium having stored thereon a computer program, characterized in that, ​ 10. A computer device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, ​

Images