Key-on and key-off control circuit applied to AGV

Abstract

The utility model discloses a one button switch machine control circuit for AGV belongs to electrical control technical field, and it solves the problem of complex AGV switch machine circuit structure, higher price in prior art. It mainly includes switching circuit, and the switching circuit includes battery switch and battery, and battery switch is electrically connected with battery, and battery is connected with power supply circuit, and power supply circuit includes high voltage drive circuit and power converter, and power converter is connected with control circuit and low voltage drive circuit, and control circuit includes controller, switch on relay KA1 and drive contactor KM1, and controller is connected with dispatching system through wireless AP, and controller controls relevant machine relay KA2, drive relay KA3 and hibernate relay KA4. The utility model adopts knob switch and relay, and realizes one button switch machine operation to AGV with the help of AGV dispatching system, reduces cost, saves switch on time, and improves work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electrical control technology, and more specifically, to a one-button start / stop control circuit for AGVs. Background Technology

[0002] AGVs are transport vehicles equipped with electromagnetic or optical automatic guidance devices, enabling them to travel along a predetermined guide path and providing safety protection and various transfer functions. With the rapid development of AGV technology, AGVs are now widely used in various industries, and the number of AGVs used is increasing year by year. The daily on / off operation of numerous AGVs has become a key factor affecting customer work efficiency and experience. Existing one-button on / off circuits for AGVs require two sets of controllers and two sets of wireless communication modules, or the addition of wireless I / O, resulting in complex equipment structures and relatively high prices. Currently, there is a lack of a low-cost, simple-to-operate one-button on / off circuit. Utility Model Content

[0003] The purpose of this invention is to provide a one-button start / stop control circuit for AGVs, so as to solve the problems of complex structure and high price of AGV start / stop circuits in the prior art.

[0004] This utility model is achieved through the following technical solution: A one-button start / stop control circuit for AGVs includes a switch circuit comprising a battery switch and a battery. The battery switch is electrically connected to the battery, and the battery is connected to a power supply circuit. The power supply circuit includes a high-voltage drive circuit and a power converter. The power converter is connected to a control circuit and a low-voltage drive circuit. The control circuit includes a controller, a start-up relay KA1, and a drive contactor KM1. The controller is connected to a scheduling system via a wireless AP. The controller controls a stop-up relay KA2, a drive relay KA3, and a sleep relay KA4.

[0005] Furthermore, the battery switch includes a limit switch SL1 and a limit switch SL2; the limit switch SL1 is electrically connected to the battery; and the limit switch SL2 is electrically connected to the control circuit.

[0006] Furthermore, the controller includes output point I, which is electrically connected to power-off relay KA2, and output point III, which is electrically connected to sleep relay KA4. Power-off relay KA2 is electrically connected to the negative terminal of the power converter's output. Limit switch SL2 is electrically connected between power-off relay KA2 and output point I. Limit switch SL2 is electrically connected to the positive terminal of the power converter's output. The positive terminal of the power converter's output is electrically connected to the normally closed contact KA2 of power-off relay KA2. The normally closed contact KA2 is electrically connected to power-on relay KA1. Power-on relay KA1 is electrically connected to the negative terminal of the power converter's output. The normally open contact KA1 of power-on relay KA1 is connected in parallel across the two ends of limit switch SL1.

[0007] Furthermore, the controller includes an output point II, which is electrically connected to a drive relay KA3, and the drive relay KA3 is electrically connected to the negative terminal of the power converter's output. The output terminal of the battery is electrically connected to a drive contactor KM1. The normally open contact KA3 of the drive relay KA3 is electrically connected between the drive contactor KM1 and the battery. The normally open contact KM1 of the drive contactor KM1 controls the high-voltage drive circuit.

[0008] Furthermore, the controller includes an output point III, which is electrically connected to a sleep relay KA4. The normally closed contact KA4 of the sleep relay KA4 controls the low-voltage drive circuit.

[0009] Furthermore, the battery switch is a rotary switch with left, right and middle positions; the limit switch SL1 is the left position, the limit switch SL2 is the right position, and the middle position is neutral.

[0010] Furthermore, the battery is a lithium battery.

[0011] Furthermore, the output voltage of the power converter is 24V.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a rotary switch and relays, leveraging an AGV scheduling system to achieve one-button start / stop operation for AGVs, reducing costs and saving startup time. It enables both one-button and manual start / stop of AGV clusters, improving work efficiency. It boasts excellent economic efficiency, flexibility, and practicality, allowing customers to quickly start and stop AGVs, enhancing production efficiency and user experience. This invention replaces multiple traditional switches with a three-position rotary switch, achieving one-button operation for complex functions. This invention also features a standby mode, minimizing power consumption during standby by maintaining only the core communication unit in operation. Attached Figure Description

[0013] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, the directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the creation of this utility model.

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Example 1: A one-button start / stop control circuit for AGVs, such as... Figure 1 As shown, the switching circuit includes a battery switch and a battery. The battery switch is electrically connected to the battery, which is connected to a power supply circuit. The power supply circuit includes a high-voltage drive circuit and a power converter. The power converter is connected to a control circuit and a low-voltage drive circuit. The control circuit includes a controller, a power-on relay KA1, and a drive contactor KM1. The controller is connected to a scheduling system via a wireless AP. The controller controls a power-off relay KA2, a drive relay KA3, and a sleep relay KA4. This invention achieves one-button power on / off of the AGV by using a standard wireless AP on the AGV in conjunction with several intermediate relays. It offers good economy, flexibility, and practicality, enabling rapid power on / off of the AGV and improving production efficiency.

[0017] Example 2: A one-button start / stop control circuit for AGVs, wherein the battery switch includes limit switch SL1 and limit switch SL2; limit switch SL1 is electrically connected to the battery; limit switch SL2 is electrically connected to the control circuit.

[0018] The battery is a lithium battery. The lithium battery has a working switch that only operates when limit switch SL1 is activated. A rotary switch is used in the circuit to manually control the lithium battery's operation. The rotary switch has three positions: the left position is a set of self-resetting limit switches SL1, the middle position is neutral, and the right position is a set of self-resetting limit switches SL2. When the lithium battery's working switch connects to the normally open contact of limit switch SL1, the lithium battery is in the powered-on state; when the lithium battery's working switch connects to the normally open contact of limit switch SL2, the lithium battery is in the powered-off state. After the AGV has completed its power-on or power-off operation, the rotary switch SL1 returns to the neutral position.

[0019] The controller includes output point I, which is electrically connected to power-off relay KA2; output point III is electrically connected to sleep relay KA4; power-off relay KA2 is electrically connected to the negative terminal of the power converter's output; a limit switch SL2 is electrically connected between power-off relay KA2 and output point I, and the limit switch SL2 is electrically connected to the positive terminal of the power converter's output; a power-on relay KA1 is connected in series with the power converter's output, and the normally closed contact KA2 of power-off relay KA2 is electrically connected between power-on relay KA1 and the power converter's output; the normally open contact KA1 of power-on relay KA1 is connected in parallel across the limit switch SL1.

[0020] AGV One-Click Shutdown Process: With the rotary switch in the neutral position, the AGV's onboard wireless AP communicates in real-time with the AGV's dispatch system via a wireless network. The AGV's onboard wireless AP also communicates in real-time with the controller via a network cable. When the operator clicks "One-Click Shutdown" on the AGV's dispatch system interface, the wireless AP on the AGV receives the one-click shutdown signal from the dispatch system and transmits it to the controller. The controller then activates the coil of the shutdown relay KA2, causing the normally closed contact KA2 to open, de-energizing and disconnecting the coil of the power-on relay KA1. The normally open contact KA1 of the power-on relay then opens, disconnecting the self-locking circuit of the lithium battery switch. The AGV's one-click shutdown is complete, achieving one-click sleep mode. This method can also be used to power off the AGV cluster when it is not in use for an extended period.

[0021] The controller includes output point II, which is electrically connected to drive relay KA3. Drive relay KA3 is electrically connected to the negative terminal of the power converter's output. The battery's output is electrically connected to drive contactor KM1. A normally open contact KA3 of drive relay KA3 is electrically connected between drive contactor KM1 and the battery. The normally open contact KM1 controls the high-voltage drive circuit. The controller also includes output point III, which is electrically connected to sleep relay KA4. The normally closed contact KA4 of sleep relay KA4 controls the low-voltage drive circuit.

[0022] AGV One-Key Sleep Process: With the rotary switch in the neutral position, the AGV's onboard wireless AP communicates with the AGV dispatch system in real time via the wireless network. The AGV's onboard wireless AP also communicates with the controller in real time via a network cable. When the customer clicks the one-key sleep button on the dispatch system interface, the wireless AP on the AGV receives the one-key sleep signal from the AGV dispatch system and transmits it to the controller. The controller's output point II loses power, the coil of drive relay KA3 loses power, and the normally open contact KA3 of drive relay KA3 opens, causing the coil of drive contactor KM1 to lose power, thus de-energizing the high-voltage drive circuit. Simultaneously, the controller controls the coil of sleep relay KA4 to engage, and the normally closed contact KA4 of sleep relay KA4 opens, allowing the lithium battery to power only the controller and wireless AP, de-energizing the low-voltage drive circuit and other 24V electrical equipment. The rated power consumption of the controller and wireless AP is 12W, and the AGV's lithium battery capacity is 48V 30Ah. Therefore, the lithium battery can normally standby for about 5 days, which is sufficient for normal production.

[0023] AGV One-Click Unsleep Deactivation Process: When the AGV needs to be de-sleep and powered on, the rotary switch is in the neutral position. The AGV's onboard wireless AP communicates with the dispatch system in real time via the wireless network, and with the controller via the network cable. The customer clicks "One-Click Unsleep Deactivation" on the dispatch system interface. The wireless AP on the AGV receives the "One-Click Unsleep Deactivation" signal from the AGV dispatch system and transmits it to the controller. The controller's output point II is powered on, driving the coil of relay KA3 to engage, closing the normally open contact KA3, and energizing the coil of contactor KM1, thus powering the high-voltage drive circuit. Simultaneously, the controller's output point III is de-energized, the coil of sleep relay KA4 is de-energized, and the normally closed contact KA4 of sleep relay KA4 is activated, powering the low-voltage drive circuit and other 24V electrical equipment. The AGV power-on process is complete.

[0024] AGV manual start-up process: Turn the rotary switch to the left position, the limit switch SL1 closes, and the lithium battery is in the power-on discharge state. The lithium battery power supplies the input terminal of the power converter on the AGV. The output voltage of the power converter is 24V. The output terminal of the power converter controls the coil of the power-on relay KA1 to close. At this time, the normally open contact KA1 of the power-on relay KA1 closes, so that the working switch of the lithium battery forms a self-locking circuit through the normally open contact KA1 of the power-on relay KA1. Then, turn the rotary switch to the middle position, the limit switch SL1 opens, and the lithium battery can also start up and discharge normally. After the AGV controller is powered on, it can control the output point III to make the coil of the drive relay KA3 close, thereby controlling the normally open contact KM1 of the drive contactor KM1 to close, the high-voltage drive circuit is powered on, and the AGV is powered on.

[0025] AGV manual shutdown process: Turn the rotary switch to the right position. At this time, the limit switch SL2 is turned on, which causes the coil of the shutdown relay KA2 to be energized. At this time, the normally closed contact KA2 of the shutdown relay KA2 is opened, which causes the coil of the power-on relay KA1 to be de-energized and disconnected. The normally open contact KA1 of the power-on relay KA1 is opened, which disconnects the lithium battery switch and stops discharging. The AGV manual shutdown is completed.

[0026] Everything else is the same as in Example 1.

[0027] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A one-button start / stop control circuit for AGVs, comprising a switch circuit, characterized in that: The switching circuit includes a battery switch and a battery. The battery switch is electrically connected to the battery. The battery is connected to a power supply circuit, which includes a high-voltage drive circuit and a power converter. The power converter is connected to a control circuit and a low-voltage drive circuit. The control circuit includes a controller, a power-on relay KA1, and a drive contactor KM1. The controller is connected to a dispatch system via a wireless AP. The controller controls the power-off relay KA2, the drive relay KA3, and the sleep relay KA4.

2. The one-button start / stop control circuit for AGVs according to claim 1, characterized in that: The battery switch includes limit switch SL1 and limit switch SL2; limit switch SL1 is electrically connected to the battery; limit switch SL2 is electrically connected to the control circuit.

3. The one-button start / stop control circuit for AGVs according to claim 2, characterized in that: The controller includes output point I, which is electrically connected to power off relay KA2, and power off relay KA2 is electrically connected to power converter; The power off relay KA2 is electrically connected to the output point I via a limit switch SL2, which is electrically connected to the power converter. The output of the power converter is connected in series with the power on relay KA1, and the normally closed contact KA2 of the power off relay KA2 is electrically connected between the power on relay KA1 and the output of the power converter. The normally open contact KA1 of the power on relay KA1 is connected in parallel across the two ends of the limit switch SL1.

4. The one-button start / stop control circuit for AGVs according to claim 2, characterized in that: The controller includes an output point II, which is electrically connected to a drive relay KA3, and the drive relay KA3 is electrically connected to a power converter. The battery is electrically connected to a drive contactor KM1; the drive contactor KM1 and the battery are electrically connected by a normally open contact KA3 of a drive relay KA3; the normally open contact KM1 of the drive contactor KM1 controls the high-voltage drive circuit.

5. The one-button start / stop control circuit for AGVs according to claim 2, characterized in that: The controller includes an output point III, which is electrically connected to a sleep relay KA4. The normally closed contact of the sleep relay KA4 controls the low-voltage drive circuit.

6. The one-button start / stop control circuit for AGVs according to claim 2, characterized in that: The battery switch is a rotary switch with left, right and middle positions; the limit switch SL1 is the left position, the limit switch SL2 is the right position, and the middle position is neutral.

7. The one-button start / stop control circuit for AGVs according to claim 1, characterized in that: The battery in question is a lithium battery.

8. The one-button start / stop control circuit for AGVs according to claim 1, characterized in that: The output voltage of the power converter is 24V.

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