Relay control system and method

Abstract

Disclosed are a relay control system, comprising: a smart electrical box (101), a controller ECU (102), and an engine ECM (104); the smart battery box (101) comprises a first relay, a second relay, and a third relay; the first relay is connected to the controller ECU (102) and the engine ECM (104), the controller ECU (102) is connected to the second relay, and the engine ECM (104) is connected to the third relay; the second relay is connected to a starting circuit of an engine, and the third relay is connected to a preheating circuit of the engine. The present invention monitors a coil trigger state and an on-state of the relay and provides an appropriate operation, thereby ensuring the accurate operating status of the relay, and preventing damage to an electrical device caused by an incorrect relay state. Further disclosed is a relay control method.

Description

A relay control system and method TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a relay control system and method. BACKGROUND

[0002] At present, the power-on control of the control power supply of the excavator, the engine start and the preheating control of the preheating plug are all controlled through relays. At present, more traditional coil relays are used. When the traditional coil relay works, the coil needs to be continuously powered, which results in a large amount of heat generated by the coil. In addition, when the coil relay fails, there is no feedback signal, and a controller needs to be connected to record the signal state. However, when the controller is stuck, the power cannot be turned off. Or when the coil signal of the relay fails to be continuously connected, the relay is continuously connected and cannot be disconnected, which may cause damage to the electrical appliances. SUMMARY

[0003] In order to solve the problems existing in the prior art, the present application provides a relay control system and method, which can prevent the damage of electrical appliances caused by relay failure.

[0004] The technical problem solved by the present application is achieved by the following technical solutions.

[0005] In a first aspect, a relay control system is provided, comprising: an intelligent electrical appliance box, a controller ECU and an engine ECM; the intelligent battery box comprises a first relay, a second relay and a third relay; the first relay is connected with the controller ECU and the engine ECM, the controller ECU is connected with the second relay, and the engine ECM is connected with the third relay; the second relay is connected with the starting circuit of the engine, and the third relay is connected with the preheating circuit of the engine.

[0006] In combination with the first aspect, the relay control system further comprises an electronic monitor and a vehicle terminal; the first relay, the second relay and the third relay are connected with the electronic monitor and the vehicle terminal through a bus.

[0007] In a second aspect, a relay control method is provided, comprising:

[0008] After the main power is turned on, the system starts initialization. Within a first set time after the initialization starts, it is determined whether there is a relay coil trigger signal. If there is, the relay does not act and issues a fault alarm. If there is not, the system continues to complete the initialization.

[0009] If the initialization starts to exceed the first set time, it is judged whether the first relay coil triggers, if yes, the first relay is turned on after the first delay time, if not, it is judged whether the second and third relay coils trigger, if yes, a fault alarm is sent and the second and third relays are disconnected, the disconnection operation is performed for the first set number of times;

[0010] After the first relay is turned on, it is judged whether the second relay coil triggers, if yes, the second relay is turned on after the first delay time;

[0011] After the first relay is turned on, it is judged whether the third relay coil triggers, if yes, the third relay is turned on after the first delay time.

[0012] In combination with the second aspect, further, the first set time is 5 seconds.

[0013] In combination with the second aspect, further, after the second relay is turned on, it is detected whether the first relay is turned on, if not, a fault alarm is sent and the second relay is disconnected;

[0014] After the third relay is turned on, it is detected whether the first relay is turned on, if not, a fault alarm is sent and the third relay is disconnected, the disconnection operation is performed for the first set number of times.

[0015] In combination with the second aspect, further, the first set number of times is 3-5 times.

[0016] In combination with the second aspect, further, after the second relay is turned on, if the second relay control signal enable state exceeds the first protection time, the second relay is controlled to perform the disconnection operation and a fault alarm is sent;

[0017] After the third relay is turned on, if the third relay control signal enable state exceeds the first protection time, the third relay is controlled to perform the disconnection operation and a fault alarm is sent.

[0018] In combination with the second aspect, further, the first protection time is 15-120 seconds.

[0019] Beneficial effects: the coil trigger state and the on state of the relay are monitored to give corresponding operations, so that the working state of the relay is ensured to be accurate and the damage of the electric appliance due to the error of the relay state is prevented.

[0020] And the relay is also provided with the timeout protection to prevent the enable state from being timed out to cause the damage of the electric appliance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a structural schematic view of the system of the present application;

[0022] Figure 2 is a flow chart of the method of the present application. DETAILED DESCRIPTION

[0023] The present application will be further described in detail below with reference to the accompanying drawings.

[0024] As shown in Figures 1-2, the present application provides a relay control system, which comprises an intelligent electric appliance box 101, a controller ECU 102, an engine ECM 104, an electronic monitor 103 and a vehicle terminal 105. The intelligent electric appliance box 101 comprises a first relay, a second relay and a third relay.

[0025] The first relay is connected with the controller ECU 102 and the engine ECM 104 to control the power-on of the system power supply, the controller ECU 102 is connected with the second relay, and the engine ECM 104 is connected with the third relay; the second relay is connected with the starting circuit of the engine to control the starting of the engine, and the third relay is connected with the preheating circuit of the engine to control the preheating of the engine.

[0026] The first relay, the second relay and the third relay are connected with the electronic monitor and the vehicle terminal through a bus, the electronic monitor 103 is used to acquire and monitor the data of the relays on site, and the vehicle terminal is used to monitor and display the data of the relays in the vehicle. The intelligent electric appliance box 101 is also provided with a power module to supply power to other modules.

[0027] When the system starts to work, the coil trigger signals and the on states of the relays are read in real time, the main power supply is turned on, the system is activated to start initialization, and after the initialization starts, whether the relay coil is triggered within the first set time (usually within 5 seconds according to actual requirements) is judged. If the coil is triggered, the relay is not allowed to act, and a fault alarm is issued, which is displayed in real time through the electronic monitor 103 and the vehicle terminal 105. If the initialization starts beyond the first set time, whether the first relay is triggered is detected. If the first relay is triggered, the first relay is turned on (closed) after the first delay time (usually 0-120 seconds according to requirements). If the first relay coil is not triggered, whether the second and third relay coils are triggered is judged. If the coils are triggered, a fault alarm is issued and the second and third relays are disconnected. The number of disconnection operations is the first set number (usually 3-5 times).

[0028] After the first relay is turned on, it is detected whether the second relay coil is triggered, if triggered, after a first delay, the second relay is turned on; in the process of turning on the second relay, it is detected again whether the first relay is in the on state, if the first relay is not turned on, a fault alarm signal is sent out, and the third relay performs disengagement operation according to the first set number of times.

[0029] Similarly, after the first relay is turned on, it is detected whether the third relay coil is triggered, if triggered, after a first delay, the second relay is turned on; in the process of turning on the second relay, it is detected again whether the first relay is in the on state, if the first relay is not turned on, a fault alarm signal is sent out, and the third relay performs disengagement operation according to the first set number of times.

[0030] In the application, each relay is also provided with an on-time protection function, if the second relay control signal enable state exceeds the first protection time after the second relay is turned on, the second relay is controlled to perform disengagement operation and fault alarm;

[0031] If the third relay control signal enable state exceeds the first protection time after the third relay is turned on, the third relay is controlled to perform disengagement operation and fault alarm.

[0032] In the application, the fault alarm, fault state number, and on number of the first relay, the second relay, and the third relay are all sent to the electronic monitor 102 and the vehicle-mounted terminal 105 for display.

[0033] The application is described with reference to flowcharts and / or block diagrams according to the method, device (system), and computer program product of the embodiments of the 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 generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate an apparatus for implementing the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0034] These computer program instructions can also be stored in a computer readable memory capable of guiding the computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer readable memory generate a product including instruction apparatus, which implements the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0035] These computer program instructions can also be loaded into a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart and / or block diagram block or blocks.

[0036] Finally, it should be noted that the above examples are merely used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the specific implementation of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A relay control system characterized by comprising: It comprises: The intelligent battery box comprises a first relay, a second relay and a third relay; the first relay is connected with the controller ECU and the engine ECM, the controller ECU is connected with the second relay, and the engine ECM is connected with the third relay; the second relay is connected with the starting circuit of the engine, and the third relay is connected with the preheating circuit of the engine.

2. A relay control system according to claim 1, characterised in that It further comprises an electronic monitor and a vehicle terminal; the first relay, the second relay and the third relay are connected with the electronic monitor and the vehicle terminal through a bus.

3. A method of relay control, characterized by, It comprises: After the main power is turned on, the system starts initialization; after the initialization starts, whether there is a relay coil trigger signal within a first set time is judged; if there is, the relay does not act and sends out a fault alarm; if not, the system continues to complete the initialization; If the initialization starts exceeds the first set time, whether the first relay coil is triggered is judged; if triggered, the first relay is turned on after a first delay time; if the first relay coil is not triggered, whether the second and third relay coils are triggered is judged; if triggered, a fault alarm is sent out and the second and third relays are disconnected; the disconnection operation is performed for a first set number of times; After the first relay is turned on, whether the second relay coil is triggered is judged; if triggered, the second relay is turned on after a first delay; After the first relay is turned on, whether the third relay coil is triggered is judged; if triggered, the third relay is turned on after a first delay.

4. A method of relay control according to claim 3, wherein The first set time is 5 seconds.

5. A method of relay control according to claim 3, wherein After the second relay is turned on, whether the first relay is turned on is detected; if not, a fault alarm is sent out and the second relay is disconnected; After the third relay is turned on, whether the first relay is turned on is detected; if not, a fault alarm is sent out and the third relay is disconnected; the disconnection operation is performed for a first set number of times.

6. A method of relay control according to claim 5, wherein The first set number of times is 3-5 times.

7. A method of relay control according to claim 3, wherein If the second relay control signal enable state exceeds a first protection time after the second relay is turned on, the second relay is controlled to perform a disconnection operation and a fault alarm is given; If the third relay control signal enable state exceeds a first protection time after the third relay is turned on, the third relay is controlled to perform a disconnection operation and a fault alarm is given.

8. A method of relay control according to claim 7, wherein The first protection time is 15-120 seconds.

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