New access equipment insertion detection power-on system, control box, equipment and new access equipment

Abstract

The invention discloses a new access equipment insertion detection power-on system, a control box, equipment and new access equipment, and relates to the technical field of intelligent equipment power supply control, the new access equipment insertion detection power-on system comprises a first control chip, a first detection feedback circuit and a new access equipment joint; the first control chip is connected with the first detection feedback circuit, and the other end of the first detection feedback circuit is connected with the new access equipment connector. A discrete detection feedback circuit structure is adopted, and a dual protection mechanism of first detection and second power supply is designed, so that the access process of new equipment is completely independent of the working states of other equipment of the system, and the technical problem that a main power supply needs to be cut off when the new equipment is accessed to intelligent equipment is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply control for intelligent devices, and in particular to a new access device insertion detection power-on system, a control box, a device and a new access device. Background Art

[0002] With the popularization of smart police cars, the intelligent police light control terminal equipment, as an important part of police cars, undertakes the control and management functions of various external devices such as police lights and video recording. In actual use, the intelligence level of police cars is constantly improving, and various external devices need to be dynamically added according to actual work needs, which puts higher requirements on the power supply management of the intelligent police light control terminal equipment.

[0003] The current intelligent police light control terminal equipment adopts a unified power supply management method. When a new external device needs to be added, the control box will perform a complete shutdown-restart process: first notify all connected devices to save data and shut down, and then cut off the main power supply; after completing the connection of the new device, power it on again and check the working status of each device one by one. Only after confirming that all devices are normal can the system operation be restored.

[0004] This power supply management method has many problems in actual application: installation and maintenance personnel need to wait for the entire system to complete the shutdown and restart process, which takes a long time; all equipment stops working during the system shutdown, resulting in interruption of important functions of the police car (such as real-time video recording); after the system restarts, all equipment needs to be re-checked, increasing the risk of system failure; when troubleshooting equipment failures, maintenance personnel can only power off and on each device in turn, which prolongs the troubleshooting time and reduces the actual availability of the police car. Summary of the invention

[0005] The main purpose of the present invention is to propose a new access device insertion detection power-on system, a control box, a device and a new access device, aiming to solve the technical problem that the main power supply of the smart device needs to be cut off when a new device is connected.

[0006] To achieve the above object, the present invention provides a new access device insertion detection and power-on system, the new access device insertion detection and power-on system comprising: a first control chip, a first detection feedback circuit and a new access device connector;

[0007] The first control chip is connected to the first detection feedback circuit, and the other end of the first detection feedback circuit is connected to the connector of the newly connected device;

[0008] The newly connected device connector is used to connect a number of newly connected devices, and when the newly connected devices are connected, they send a connection electrical signal to the first detection feedback circuit;

[0009] The first detection feedback circuit is used to detect the access electrical signal and transmit the access electrical signal to the first control chip;

[0010] The first control chip is configured to send an access success electrical signal to the first detection feedback circuit upon receiving the access electrical signal;

[0011] The first detection feedback circuit is further used to send the access success electrical signal to the new access device, so that the new access device confirms the access success;

[0012] The first control chip is further used to control the detection feedback circuit to input a power supply voltage to the newly connected device when the newly connected device confirms successful access.

[0013] In one embodiment, the detection feedback circuit includes: a detection unit and a feedback unit;

[0014] One end of the detection unit is connected to the control pin of the first control chip, and the other end of the detection unit is connected to the connector of the newly connected device; one end of the feedback unit is connected to the feedback pin of the first control chip, and the other end of the feedback unit is connected to the connector of the newly connected device;

[0015] The detection unit is used to detect the access electrical signal and transmit the access electrical signal to the first control chip;

[0016] The feedback unit is used to send the access success electrical signal to the new access device, so that the new access device confirms the access success.

[0017] In one embodiment, the detection unit includes: a first MOS tube, a first capacitor, a first diode, a first resistor and a second resistor;

[0018] The drain of the first MOS tube is connected to the control pin of the first control chip, the source of the first MOS tube is grounded, the gate of the first MOS tube is connected to one end of the first resistor and the first capacitor, the other end of the first resistor and the other end of the first capacitor are grounded, the end of the first resistor and the first capacitor connected to the gate of the first MOS tube is also connected to one end of the second resistor, the other end of the second resistor is connected to the seventh pin of the new access device connector, the positive pole of the first diode is connected to the eighth pin of the new access device connector and is grounded at the same time, the negative pole of the first diode is connected to the sixth pin of the new access device connector, and the sixth pin of the new access device connector is connected to the power supply.

[0019] In one embodiment, the feedback unit includes: a second MOS tube, a third resistor and a fourth resistor;

[0020] The source of the second MOS is grounded, the gate of the second MOS is connected to the feedback pin of the control chip, the drain of the second MOS is connected to the feedback power supply, one end of the third resistor is connected to the feedback power supply, the other end of the third resistor is connected to the drain of the second MOS, one end of the fourth resistor is connected to the drain of the second MOS, and the other end of the fourth resistor is connected to the fifth pin of the new access device connector.

[0021] In addition, to achieve the above-mentioned purpose, the present invention further proposes a control box, which includes the above-mentioned new access device insertion detection and power-on system.

[0022] In addition, to achieve the above-mentioned purpose, the present invention also proposes a new device insertion detection and power-on device, and the new device insertion detection and power-on device includes the above-mentioned new access device insertion detection and power-on system.

[0023] In addition, to achieve the above-mentioned purpose, the present invention also proposes a new access device, which includes: a second control chip, an external connector and a second detection feedback circuit;

[0024] The newly connected device is connected to the newly connected device insertion detection power-on system through the external connector, the second control chip is connected to the second detection feedback circuit, and the other end of the second detection feedback circuit is connected to the external connector;

[0025] The external connector is used to connect to the connector of the new access device, connect the new access device to the new access device insertion detection power-on system, and receive the power supply voltage input by the new access device insertion detection power-on system;

[0026] The second detection feedback circuit is used to send an access electrical signal to the first detection feedback circuit when the new access device is connected to the new access device insertion detection power-on system, and receive an access success electrical signal, and send the access success electrical signal to the second control chip;

[0027] The second control chip is used to control the new access device to work when receiving the access success electrical signal.

[0028] In one embodiment, the newly connected device further comprises: a power protection circuit;

[0029] The power protection circuit is connected to the power input terminal of the external connector;

[0030] The power protection circuit is used to cut off the input of the power supply voltage when the power input terminal of the external connector is wired incorrectly.

[0031] In one embodiment, the second detection feedback circuit includes: a third MOS tube, a second capacitor, a second diode, a third diode, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor and an eleventh resistor;

[0032] The source of the third MOS tube is grounded, the drain of the third MOS tube is connected to the detection pin of the second control chip, the gate of the third MOS tube is connected to the fifth resistor, the sixth resistor and one end of the second capacitor, the other end of the sixth resistor and the other end of the second capacitor are grounded, the other end of the fifth resistor is connected to the fourth pin of the external connector, the fourth pin of the external connector is also connected to one end of the seventh resistor, the other end of the seventh resistor is connected to the fifth pin of the external connector, one end of the eighth resistor is connected to the seventh pin of the external connector, the other end of the eighth resistor is connected to the eighth pin of the external connector, the eighth pin of the external connector is grounded, one end of the ninth resistor is connected to one end of the fifth resistor connected to the fourth pin of the external connector, the other end of the ninth resistor is connected to the anode of the second diode, the cathode of the second diode is connected to the seventh pin of the external connector and one end of the tenth resistor, the other end of the tenth resistor is connected to one end of the eleventh resistor, the other end of the eleventh resistor is connected to the cathode of the third diode, and the anode of the third diode is connected to the internal network voltage of the newly connected device.

[0033] In one embodiment, the power protection circuit includes: a fourth diode, a third capacitor, a fourth capacitor and a first magnetic bead;

[0034] The positive pole of the fourth diode is connected to the fifth pin of the external connector, the negative pole of the fourth diode is connected to one end of the third capacitor and one end of the fourth capacitor, the other end of the third capacitor and the other end of the fourth capacitor are grounded, the negative pole of the fourth diode is also connected to one end of the first magnetic bead, and the other end of the first magnetic bead is connected to the internal network voltage.

[0035] In this application, due to the use of a discrete detection feedback circuit structure and the design of a dual protection mechanism of first detection and then power supply, the access process of the new device is completely independent of the working status of other devices in the system, which effectively solves the problem that the entire system needs to be shut down before adding new devices in the traditional solution. This solution uses the first detection feedback circuit to independently manage the power supply and monitor the status of the newly connected device, ensuring the safety and reliability of the new device access process, and will not affect the normal operation of other devices; at the same time, the first control chip avoids system failures caused by abnormal new devices through step-by-step detection and confirmation. This design effectively realizes the hot-swappable function of the intelligent police light control terminal device, greatly improving the scalability and maintenance efficiency of the system: on the one hand, installation and maintenance personnel can add or replace equipment at any time without shutting down the entire system, saving a lot of time; on the other hand, key functions such as real-time recording will not be interrupted due to the increase or decrease of equipment, ensuring the continuity of the police car function; in addition, when troubleshooting, a single device can also be detected without affecting the operation of other devices, significantly improving the maintainability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of a functional module structure provided for the first embodiment of the new access device insertion detection and power-on system of the present application;

[0038] Figure 2 A schematic diagram of a functional module structure provided for the second embodiment of the new access device insertion detection and power-on system of the present application;

[0039] Figure 3 A schematic diagram of a functional module structure provided for the third embodiment of the new access device insertion detection and power-on system of the present application;

[0040] Figure 4 Another functional module structure diagram provided for the third embodiment of the new access device insertion detection and power-on system of the present application;

[0041] Figure 5 A circuit diagram is provided for Embodiment 4 of the new access device insertion detection and power-on system of the present application.

[0042] Description of Figure Numbers:

[0043] Label name Label name 10 First control chip 20 First detection feedback circuit 30 New access equipment connector 40 Second control chip 50 Second detection feedback circuit 60 External connector 70 Power protection circuit 201 Detection unit 202 Feedback unit

[0044] Label name Label name R1 First resistor R2 Second resistor R3 The third resistor R4 The fourth resistor R5 Fifth resistor R6 The sixth resistor R7 Seventh resistor R8 Eighth resistor R9 Ninth resistor R10 Tenth resistor R11 The eleventh resistor C1 First capacitor C2 Second capacitor C3 The third capacitor C4 The fourth capacitor D1 The first diode D2 The second diode D3 The third diode D4 The fourth diode Q1 The first MOS tube Q2 The second MOS tube Q3 The third MOS tube L1 First magnetic beads

[0045] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, and back), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] This application proposes a schematic diagram of the structure of a new access device insertion detection power-on system in the first embodiment. Please refer to Figure 1 , the new access device insertion detection power-on system includes: a first control chip 10, a first detection feedback circuit 20 and a new access device connector 30;

[0050] The first control chip 10 is connected to the first detection feedback circuit 20, and the other end of the first detection feedback circuit 20 is connected to the new access device connector 30;

[0051] The first control chip 10 represents the main control unit of the system, which is used to receive the device access electrical signal and control the power-on process. After receiving the access electrical signal, the first control chip 10 first sends an access success electrical signal, and then controls the power supply after the device confirms the access success, realizing step-by-step control.

[0052] Specifically, the first control chip 10 first receives an access electrical signal from the first detection feedback circuit 20, then sends an access success electrical signal to the first detection feedback circuit 20, and after receiving feedback from the device confirming successful access, finally controls the first detection feedback circuit 20 to power the newly connected device.

[0053] In some embodiments, the control process can be implemented in a variety of ways: optionally, a sequential control scheme is adopted to perform in a fixed order of receiving signals, sending confirmations, waiting for feedback, and controlling power supply; optionally, a state machine control scheme is adopted to trigger corresponding control actions according to different states to achieve a more flexible control process. It is understandable that other methods can also be used to implement the control function, which is not limited here.

[0054] The first detection feedback circuit 20 is a circuit unit for detecting the device status and transmitting the control signal, and is responsible for the functions of signal detection, transmission and power supply. The first detection feedback circuit 20 serves as a bridge between the first control chip 10 and the newly connected device, and is responsible for the bidirectional transmission of signals.

[0055] Specifically, the first detection feedback circuit 20 first detects the access electrical signal of the new device and transmits it to the first control chip 10, then transmits the access success electrical signal of the first control chip 10 to the new access device, and finally performs the power supply operation according to the instruction of the first control chip 10.

[0056] In some embodiments, the detection and transmission functions can be implemented in a variety of ways: optionally, a level detection scheme is adopted, the access electrical signal is detected by a voltage comparator, the transmission signal is processed by a signal conditioning circuit, and the power supply is controlled by a power management circuit; optionally, a digital communication scheme is adopted, the control signal is transmitted using a serial communication interface, and the power supply control is performed through a dedicated drive circuit.

[0057] It is understandable that the detection and transmission functions may also be implemented in other ways, which are not limited here.

[0058] The new device connector 30 represents a standard interface unit for connecting a newly added device, and is an interface for physical connection and signal transmission between the system and the new device. When a new device is connected, it sends an access electrical signal to the system through the connector and receives a confirmation signal from the system.

[0059] Specifically, the connector 30 of the newly connected device establishes an electrical connection with the new device through its pins, generates an access electrical signal when the device is connected, and allows power supply after receiving the access success electrical signal.

[0060] In some embodiments, device access can be achieved in a variety of ways: optionally, a mechanical contact solution is used to generate an access electrical signal through mechanical contact of dedicated pins, and control signals and power are transmitted through other pins; optionally, an intelligent interface solution is used with an automatic identification function to generate a corresponding access electrical signal according to the device type.

[0061] It is understandable that other methods may be used to implement device access and connection, which are not limited here.

[0062] It is understandable that other methods may be used to implement device access connection, which is not limited here.

[0063] In the present application, due to the use of a discrete detection feedback circuit structure and the design of a dual protection mechanism of first detection and then power supply, the access process of the new device is completely independent of the working status of other devices in the system, which effectively solves the problem that the entire system needs to be shut down before adding new devices in the traditional solution. This solution uses the first detection feedback circuit 20 to independently manage the power supply and monitor the status of the newly connected device, ensuring the safety and reliability of the new device access process, and will not affect the normal operation of other devices; at the same time, the first control chip 10 avoids system failures caused by abnormal new devices through step-by-step detection and confirmation. This design effectively realizes the hot-swappable function of the intelligent police light control terminal device, greatly improving the scalability and maintenance efficiency of the system: on the one hand, the installation and maintenance personnel can add or replace devices at any time without shutting down the entire system, saving a lot of time; on the other hand, key functions such as real-time recording will not be interrupted due to the increase or decrease of equipment, ensuring the continuity of the police car function; in addition, when troubleshooting, a single device can also be detected without affecting the operation of other devices, significantly improving the maintainability of the system.

[0064] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can refer to the above introduction, and will not be repeated later. Figure 2 Based on the first embodiment, this embodiment proposes a more specific structure of the first detection feedback circuit 20 as follows:

[0065] The detection feedback circuit includes: a detection unit 201 and a feedback unit 202;

[0066] One end of the detection unit 201 is connected to the control pin of the first control chip 10, and the other end of the detection unit 201 is connected to the new access device connector 30. One end of the feedback unit 202 is connected to the feedback pin of the first control chip 10, and the other end of the feedback unit 202 is connected to the new access device connector 30.

[0067] The detection unit 201 represents a functional module responsible for signal detection in the first detection feedback circuit 20, and refers to a circuit unit for detecting the access electrical signal of the newly connected device and transmitting the signal to the first control chip 10. The detection unit 201 is connected to the newly connected device connector 30 through its signal detection port, and is connected to the control pin of the first control chip 10 through the control port, forming a complete signal detection path.

[0068] The detection unit 201 is mainly responsible for signal detection and transmission when a new device is connected. Specifically, when a new device is connected to the system through the new device connector 30, the access electrical signal (such as a 12V voltage signal) of the external interface is first detected. The access electrical signal passes through the voltage divider and shaping circuit inside the detection unit 201, and the input voltage is converted into a level signal (such as a 5V voltage signal) that can be recognized by the system. The converted signal passes through the level control circuit to make the output end become a low level (such as a 0V voltage signal), and the low level signal is transmitted to the first control chip 10, indicating that a new device is connected. That is, the access electrical signal is successfully transmitted to the first control chip 10.

[0069] Subsequently, the first control chip 10 outputs an access success electrical signal (such as a high-level signal) through the control signal line. After the signal is processed by the level conversion circuit of the detection unit 201, the voltage of the corresponding pin of the device interface becomes a low level. At this time, the newly connected device can detect this level change and use it as an access confirmation signal. When the new device confirms access, the detection unit 201 will continue to monitor the power supply voltage status, convert the power supply voltage (12V) into a control signal (5V) through the voltage divider detection circuit, and finally output a low-level signal (0V) to inform the first control chip 10 that the power supply is normal. Throughout the process, the detection unit 201 ensures the accuracy and reliability of signal detection through level conversion and signal conditioning.

[0070] The feedback unit 202 represents a functional module in the first detection feedback circuit 20 that is responsible for signal feedback, and refers to a circuit unit that receives a successful access electrical signal from the first control chip 10 and transmits it to the newly connected device. The feedback unit 202 is connected to the feedback pin of the first control chip 10 through its input port, and is connected to the connector 30 of the newly connected device through its output port, forming a complete signal feedback path.

[0071] The feedback unit 202 is mainly responsible for transmitting the system confirmation information to the newly connected device. Specifically, when the first control chip 10 detects that a new device is connected, it outputs a high level (5V) through the feedback pin. The signal is processed by the level conversion circuit inside the feedback unit 202, so that the voltage of the corresponding pin of the connector 30 of the newly connected device becomes a low level (0V). This level change is detected by the newly connected device and recognized as an ACC signal, indicating that the system has confirmed the device access. That is, the access success electrical signal is successfully sent to the newly connected device.

[0072] Subsequently, the first control chip 10 turns on the power switch through a control signal to provide working power to the device.

[0073] In the embodiment of the present application, since the detection unit 201 and the feedback unit 202 are respectively responsible for signal detection and feedback control, the access detection and power supply control process of the new device are clearly divided into two independent stages, so that the accurate control and status monitoring of the access process of the new device can be realized, and the problems of false detection and power supply timing disorder that may occur in the access process of the traditional device are effectively solved, thereby realizing the reliability and safety of the access process of the new device. Specifically: the detection unit 201 ensures the accuracy of the access detection through level conversion and signal conditioning, and avoids false detection caused by signal interference; the feedback unit 202 ensures the orderliness of the power-on process of the device through the step-by-step confirmation mechanism and power supply control, and prevents equipment damage caused by power supply timing errors; the cooperation of the two units establishes a complete detection-confirmation-power supply control link, which greatly improves the working reliability and safety of the system, simplifies the circuit design, and improves the integration and practicality of the system.

[0074] Based on the first embodiment and / or the second embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those of the first and second embodiments can be referred to the above description, and will not be described in detail later. Figure 3 and Figure 4 , this embodiment provides a new access device adapted to the new access device insertion detection power-on system;

[0075] refer to Figure 3 , the new access device includes: a second control chip 40, an external connector 60 and a second detection feedback circuit 50;

[0076] The newly connected device is connected to the newly connected device insertion detection power-on system through the external connector 60, the second control chip 40 is connected to the second detection feedback circuit 50, and the other end of the second detection feedback circuit 50 is connected to the external connector 60;

[0077] Among them, the second control chip 40 represents the core control unit in the newly connected device, which refers to the main controller responsible for processing the access signal and controlling the working state of the device. The second control chip 40 is connected to the second detection feedback circuit 50 through its signal interface, and can receive the confirmation signal of successful device access and control the device to enter a normal working state accordingly. The second control chip 40 usually includes a signal processing module, a control logic module and a working state management module, which can realize comprehensive control of the operation of the device.

[0078] The second control chip 40 is mainly responsible for the state control and work management of the device. Specifically, when the device is connected to the system through the external connector 60, the second control chip 40 first enters the standby state and waits for the access confirmation signal; when the access success electrical signal is received through the second detection feedback circuit 50, the second control chip 40 starts the internal initialization program, and completes the system parameter configuration, peripheral initialization and work mode setting in sequence; then, the second control chip 40 checks the power supply voltage, and after confirming that the power supply is stable, controls the device to enter the normal working state, and continuously monitors the operating state of the device to ensure stable operation of the device.

[0079] The external connector 60 represents a physical interface unit for connecting the new access device to the new access device insertion detection power-on system, and refers to a standardized interface device for realizing electrical connection and signal transmission. The external connector 60 is connected to the new access device connector 30 through its pins, and can establish a reliable electrical connection and transmit various signals, thereby ensuring a stable connection between the device and the system.

[0080] The external connector 60 is mainly responsible for establishing physical connections and transmitting various signals. Specifically, when the device needs to be connected to the system, the external connector 60 first establishes a mechanical connection with the system-side connector through its pins to form a reliable electrical path; then it receives the working voltage provided by the system through the power pin, transmits the access electrical signal and receives the access success electrical signal through the signal pin. At the same time, the external connector 60 also needs to ensure the correct transmission of various signals to avoid signal interference and crosstalk.

[0081] The second detection feedback circuit 50 represents a functional module in the newly connected device responsible for signal detection and feedback, and refers to a circuit unit for sending an access signal and receiving a confirmation signal. The second detection feedback circuit 50 is connected to the external connector 60 and the second control chip 40 through its interface, and can realize bidirectional signal transmission.

[0082] The second detection feedback circuit 50 is mainly responsible for the signal interaction during the access process. Specifically, when the new device establishes a physical connection with the system through the external connector 60, the second detection feedback circuit 50 first detects the voltage input of the pin of the external connector 60, converts the voltage into a control signal through the internal voltage division and level conversion circuit, and then converts the control signal into a low-level signal through the signal conditioning circuit. This low-level signal is the access electrical signal sent to the first detection feedback circuit 20; then the second detection feedback circuit 50 waits for the response of the first detection feedback circuit 20. When the high-level signal (5V) returned by the system is received, this high-level signal is the access success electrical signal. The second detection feedback circuit 50 converts it into a low level (0V) through level conversion, and processes and verifies it through the signal conditioning circuit inside the second detection feedback circuit 50. At this time, the processed access success electrical signal (low level) is transmitted to the control pin of the second control chip 40, so that the second control chip 40 can recognize the access confirmation signal and enter a normal working state. During the entire signal interaction process, the second detection feedback circuit 50 ensures reliable transmission of access signals and confirmation signals through precise level control and strict timing management, and prevents malfunctions caused by signal interference or timing disorder.

[0083] refer to Figure 4 , the new access device further includes: a power protection circuit 70;

[0084] The power protection circuit 70 is connected to the power input terminal of the external connector 60;

[0085] The power protection circuit 70 represents a functional unit in the newly connected device that is responsible for power safety protection, and refers to a protection circuit module used to prevent abnormal situations such as reverse connection, overvoltage, overcurrent, etc. The power protection circuit 70 is connected to the power pin of the external connector 60 through its input end, and the output end is connected to the internal power supply network of the device, which can achieve rapid disconnection protection in the event of power abnormality.

[0086] The power protection circuit 70 is mainly responsible for preventing equipment damage caused by wiring errors. Specifically, when a new device is connected to the system through the external connector 60, the power protection circuit 70 first samples and detects the positive and negative voltages of the power input terminal, and determines whether the positive voltage is higher than the negative voltage by voltage comparison, thereby determining whether the polarity of the power connection is correct; when it is detected that the positive and negative poles of the power supply are connected in reverse, the voltage detection unit 201 inside the protection circuit will immediately generate an error signal, triggering the protection mechanism to cut off the power input path, and prevent the reverse current from damaging the device.

[0087] In general, in this embodiment, due to the use of a two-way detection feedback mechanism composed of the first detection feedback circuit 20 and the second detection feedback circuit 50, and through a strict signal interaction process and verification mechanism, it is possible to accurately identify the access status of the new device and ensure the reliability of signal transmission, effectively solving the problems of inaccurate signal recognition, false triggering and unstable communication in the access process of traditional devices, thereby achieving a significant improvement in the accuracy and reliability of new device access detection, greatly improving the system's access identification capability and working stability, and ensuring that the device can complete the access process safely and reliably.

[0088] Based on the first embodiment, the second embodiment and / or the third embodiment of the present application, in the fourth embodiment of the present application, the same or similar contents as those of the first embodiment, the second embodiment and the third embodiment can refer to the above introduction, and will not be repeated later. Figure 5 , this embodiment provides a specific circuit diagram of a newly connected device insertion detection power-on system and a newly connected device;

[0089] The detection unit 201 includes: a first MOS tube Q3, a first capacitor, a first diode D1, a first resistor R1 and a second resistor R2;

[0090] The drain of the first MOSFET Q3 is connected to the control pin of the first control chip 10, the source of the first MOSFET Q3 is grounded, the gate of the first MOSFET Q3 is connected to the first resistor R1 and one end of the first capacitor, the other end of the first resistor R1 and the other end of the first capacitor are grounded, the end of the first resistor R1 and the first capacitor connected to the gate of the first MOSFET Q3 is also connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to the seventh pin of the newly connected device connector 30, the anode of the first diode D1 is connected to the eighth pin of the newly connected device connector 30 and is grounded at the same time, the cathode of the first diode D1 is connected to the sixth pin of the newly connected device connector 30, and the sixth pin of the newly connected device connector 30 is connected to the power supply.

[0091] The feedback unit 202 includes: a second MOS tube Q2, a third resistor R3 and a fourth resistor R4;

[0092] The source of the second MOSFET Q2 is grounded, the gate of the second MOSFET Q2 is connected to the feedback pin of the control chip, the drain of the second MOSFET Q2 is connected to the feedback power supply, one end of the third resistor R3 is connected to the feedback power supply, the other end of the third resistor R3 is connected to the drain of the second MOSFET Q2, one end of the fourth resistor R4 is connected to the drain of the second MOSFET Q2, and the other end of the fourth resistor R4 is connected to the fifth pin of the newly connected device connector 30.

[0093] The second detection feedback circuit 50 includes: a third MOS tube, a second capacitor C2, a second diode D2, a third diode D3, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10 and an eleventh resistor R11;

[0094] The source of the third MOS tube is grounded, the drain of the third MOS tube is connected to the detection pin of the second control chip 40, the gate of the third MOS tube is connected to the fifth resistor R5, the sixth resistor R6 and one end of the second capacitor C2, the other end of the sixth resistor R6 and the other end of the second capacitor C2 are grounded, the other end of the fifth resistor R5 is connected to the fourth pin of the external connector 60, the fourth pin of the external connector 60 is also connected to one end of the seventh resistor R7, the other end of the seventh resistor R7 is connected to the fifth pin of the external connector 60, one end of the eighth resistor R8 is connected to the seventh pin of the external connector 60, and the other end of the eighth resistor R8 is connected to the One end is connected to the eighth pin of the external connector 60, the eighth pin of the external connector 60 is grounded, one end of the ninth resistor R9 is connected to one end of the fifth resistor R5 connected to the fourth pin of the external connector 60, the other end of the ninth resistor R9 is connected to the anode of the second diode D2, the cathode of the second diode D2 is connected to the seventh pin of the external connector 60 and one end of the tenth resistor R10, the other end of the tenth resistor R10 is connected to one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is connected to the cathode of the third diode D3, and the anode of the third diode D3 is connected to the internal network voltage of the newly connected device.

[0095] The power protection circuit 70 includes: a fourth diode D4, a third capacitor C3, a fourth capacitor C4 and a first magnetic bead L1;

[0096] The anode of the fourth diode D4 is connected to the fifth pin of the external connector 60, the cathode of the fourth diode D4 is connected to one end of the third capacitor C3 and one end of the fourth capacitor C4, the other end of the third capacitor C3 and the other end of the fourth capacitor C4 are grounded, the cathode of the fourth diode D4 is also connected to one end of the first magnetic bead L1, and the other end of the first magnetic bead L1 is connected to the internal network voltage.

[0097] Pin 1 of the new device access connector is connected to pin 1 of the external connector 60, pin 2 of the new device access connector is connected to pin 2 of the external connector 60, pin 3 of the new device access connector is connected to pin 3 of the external connector 60, pin 4 of the new device access connector is connected to pin 6 of the external connector 60, pin 5 of the new device access connector is connected to pin 4 of the external connector 60, pin 6 of the new device access connector is connected to pin 5 of the external connector 60, pin 7 of the new device access connector is connected to pin 7 of the external connector 60, and pin 8 of the new device access connector is connected to pin 8 of the external connector 60.

[0098] Based on the above specific circuit structure, this embodiment provides the corresponding power-on process and power-off process. The power-on process is as follows:

[0099] Power-on detection: First process: Pin 5 of the new device connected to the connector outputs a 12V voltage at pin 4 of the external connector 60. The 12V voltage at pin 4 of the external connector 60 passes through the second diode D2 and the ninth resistor R9, and the voltage at pin 7 of the external connector 60 becomes 11V. Pin 7 of the external connector 60 is connected to pin 7 of the new device connected connector. The 11V voltage at pin 7 of the new device connected connector is divided by the first resistor R1 and the second resistor R2 to become 5V. The gate voltage of the first MOSFET Q3 is 5V, and the drain and source of the first MOSFET Q3 are turned on, changing the network voltage of the control pin (FB_IN) to a low level of 0V. At this time, the first control chip 10 detects that a new device has been inserted. The second process: the first control chip 10 changes the feedback pin (PWR_KEY) to a high level of 5V, the gate voltage of the second MOS tube Q2 is 5V, the drain and source of the second MOS tube Q2 are turned on, the drain voltage of the second MOS tube Q2 is 0V, and the voltage on the fourth resistor R4 is 0V. At this time, the voltage of the 5th pin of the new device access connector is 0V, and the 5th pin of the new device access connector is connected to the 4th pin of the external connector 60. At this time, the 4th pin of the external connector 60 is 0V. After passing through the fifth resistor R5, the gate of the third MOS tube is 0V, and the source and drain of the third MOS tube are not turned on. Then, the detection pin (ACC_IN) of the second control chip 40 is a high level of 5V, and the new device detects that there is an ACC signal. At this time, the new device detects that the power-on detection is completed.

[0100] Device power-on: The first control chip 10 turns on the first MOS tube Q3, and the 6th pin of the new device connected to the connector outputs a 12V voltage power supply. The 7th pin of the new device connected to the connector is connected to the 7th pin of the external connector 60, and the 7th pin of the external connector 60 inputs a 12V voltage. The B+12V voltage network is a 12V voltage. After passing through the fourth diode D4 and the first magnetic bead L1, the internal network voltage (POW_12V) of the new connected device is 11.5V. Then, after passing through the third diode D3, the eleventh resistor R11 and the tenth resistor R10, the voltage of the 7th pin of the external connector 60 is 11V. The 7th pin of the new device connected to the connector is 11V. After the voltage is divided by the first resistor R1 and the second resistor R2, the gate voltage of the first MOS tube Q3 is 5V, the source and drain of the first MOS tube Q3 are turned on, and the voltage of the control pin (FB_IN) becomes a low level. The first control chip 10 detects that the power supply to the external connector 60 peripheral is normal, and the power-on is completed at this time.

[0101] The power-off process is as follows:

[0102] The device is disconnected and re-detected: the 4th pin of the external connector 60 is at a low level of 0V, the voltage of the 7th pin changes from a high level of 11V to a low level of 0V, the gate of the third MOS tube is at a low level, the drain and source of the third MOS tube are not conducting, the drain voltage is 5V, and the detection pin (ACC_IN) of the second control chip 40 is at a high level. At this time, the second control chip 40 of the newly connected device detects that it is disconnected from the newly connected device insertion detection power-on system. At this time, the 7th pin of the external connector 60 is at a low level of 0V, and the 7th pin of the new device access connector connected to it is at a low level of 0V. After passing through the first resistor R1 and the second resistor R2, the gate of the first MOS tube Q3 is at a low level of 0V, and the drain of the first MOS tube Q3 is at a voltage of 5V. At this time, the first control chip 10 is informed that the external device is disconnected and waits for the 7th pin of the new device access connector to become a high level of 11V. If it does not become a high level within the preset delay time, it is considered to be disconnected, and the newly connected device performs a shutdown operation.

[0103] Device power-off process: the feedback pin (PWR_KEY) on the first control chip 10 becomes a low level of 0V. At this time, the voltage of the 5th pin of the new device access connector is 12V, and the 4th pin of the external connector 60 connected to it is a high level of 12V. After the voltage is divided by the fifth resistor R5 and the sixth resistor R6, the gate of the third MOS tube is 5V, the drain and source of the third MOS tube are turned on, and the detection pin (ACC_IN) of the second control chip 40 is low. The external device starts to count down to a preset time before shutting down. After the countdown is completed, if the detection pin (ACC_IN) of the second control chip 40 is still detected to be low, the shutdown command is directly issued. After the feedback pin (PWR_KEY) delays for a preset period of time, the level changes from a high level to a low level of 0V, the voltage of the 7th pin of the external connector 60 is 11V, and the voltage of the 7th pin of the new device access connector connected thereto is 11V. After voltage division by the first resistor R1 and the second resistor R2, the gate voltage of the first MOS tube Q3 is 5V, the drain and source of the first MOS tube Q3 are turned on, and the control pin (FB_IN) is at a low level. At this time, the first control chip 10 detects that the control pin (FB_IN) is at a low level and disconnects the B+12V power supply connected to the new device access connector.

[0104] Power off is completed: After disconnecting the B+12V power supply, the 4th and 7th pins of the external connector 60 are at a low level of 0V, and the device is shut down.

[0105] It should be noted that the present invention is not only applicable to intelligent warning light control terminal equipment, but also applicable to other industries that require new access equipment detection occasions.

[0106] An embodiment of the present application further provides a control box, which includes the above-mentioned new access device insertion detection and power-on system.

[0107] An embodiment of the present application also provides a new device insertion detection and power-on device, and the new device insertion detection and power-on device includes the above-mentioned new access device insertion detection and power-on system.

[0108] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A new access device insertion detection and power-on system, characterized in that: The newly connected device insertion detection and power-on system comprises: a first control chip, a first detection feedback circuit and a newly connected device connector; The first control chip is connected to the first detection feedback circuit, and the other end of the first detection feedback circuit is connected to the connector of the newly connected device; The newly connected device connector is used to connect a number of newly connected devices, and when the newly connected devices are connected, they send a connection electrical signal to the first detection feedback circuit; The first detection feedback circuit is used to detect the access electrical signal and transmit the access electrical signal to the first control chip; The first control chip is configured to send an access success electrical signal to the first detection feedback circuit upon receiving the access electrical signal; The first detection feedback circuit is further used to send the access success electrical signal to the new access device, so that the new access device confirms the access success; The first control chip is further used to control the detection feedback circuit to input a power supply voltage to the newly connected device when the newly connected device confirms successful access.

2. The new access device insertion detection and power-on system according to claim 1, characterized in that: The detection feedback circuit comprises: a detection unit and a feedback unit; One end of the detection unit is connected to the control pin of the first control chip, and the other end of the detection unit is connected to the connector of the newly connected device; one end of the feedback unit is connected to the feedback pin of the first control chip, and the other end of the feedback unit is connected to the connector of the newly connected device; The detection unit is used to detect the access electrical signal and transmit the access electrical signal to the first control chip; The feedback unit is used to send the access success electrical signal to the new access device, so that the new access device confirms the access success.

3. The new access device insertion detection and power-on system according to claim 2, characterized in that: The detection unit includes: a first MOS tube, a first capacitor, a first diode, a first resistor and a second resistor; The drain of the first MOS tube is connected to the control pin of the first control chip, the source of the first MOS tube is grounded, the gate of the first MOS tube is connected to one end of the first resistor and the first capacitor, the other end of the first resistor and the other end of the first capacitor are grounded, the end of the first resistor and the first capacitor connected to the gate of the first MOS tube is also connected to one end of the second resistor, the other end of the second resistor is connected to the seventh pin of the new access device connector, the positive pole of the first diode is connected to the eighth pin of the new access device connector and is grounded at the same time, the negative pole of the first diode is connected to the sixth pin of the new access device connector, and the sixth pin of the new access device connector is connected to the power supply.

4. The new access device insertion detection and power-on system as claimed in claim 3, characterized in that: The feedback unit includes: a second MOS tube, a third resistor and a fourth resistor; The source of the second MOS is grounded, the gate of the second MOS is connected to the feedback pin of the control chip, the drain of the second MOS is connected to the feedback power supply, one end of the third resistor is connected to the feedback power supply, the other end of the third resistor is connected to the drain of the second MOS, one end of the fourth resistor is connected to the drain of the second MOS, and the other end of the fourth resistor is connected to the fifth pin of the new access device connector.

5. A control box, characterized in that: The control box comprises the new access device insertion detection power-on system as described in any one of claims 1 to 4.

6. A new device is inserted into the detection power-on device, characterized in that: The new device insertion detection and power-on system device comprises the new device insertion detection and power-on system as claimed in any one of claims 1 to 4.

7. A new access device, characterized in that: include: a second control chip, an external connector, and a second detection feedback circuit; The newly connected device is connected to the newly connected device insertion detection power-on system through the external connector, the second control chip is connected to the second detection feedback circuit, and the other end of the second detection feedback circuit is connected to the external connector; The external connector is used to connect to the connector of the new access device, connect the new access device to the new access device insertion detection power-on system, and receive the power supply voltage input by the new access device insertion detection power-on system; The second detection feedback circuit is used to send an access electrical signal to the first detection feedback circuit when the new access device is connected to the new access device insertion detection power-on system, and receive an access success electrical signal, and send the access success electrical signal to the second control chip; The second control chip is used to control the new access device to work when receiving the access success electrical signal.

8. The new access device according to claim 7, characterized in that: The new access device further includes: a power protection circuit; The power protection circuit is connected to the power input terminal of the external connector; The power protection circuit is used to cut off the input of the power supply voltage when the power input terminal of the external connector is wired incorrectly.

9. The new access device according to claim 8, characterized in that: The second detection feedback circuit includes: a third MOS tube, a second capacitor, a second diode, a third diode, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor and an eleventh resistor; The source of the third MOS tube is grounded, the drain of the third MOS tube is connected to the detection pin of the second control chip, the gate of the third MOS tube is connected to the fifth resistor, the sixth resistor and one end of the second capacitor, the other end of the sixth resistor and the other end of the second capacitor are grounded, the other end of the fifth resistor is connected to the fourth pin of the external connector, the fourth pin of the external connector is also connected to one end of the seventh resistor, the other end of the seventh resistor is connected to the fifth pin of the external connector, one end of the eighth resistor is connected to the seventh pin of the external connector, the other end of the eighth resistor is connected to the eighth pin of the external connector, the eighth pin of the external connector is grounded, one end of the ninth resistor is connected to one end of the fifth resistor connected to the fourth pin of the external connector, the other end of the ninth resistor is connected to the anode of the second diode, the cathode of the second diode is connected to the seventh pin of the external connector and one end of the tenth resistor, the other end of the tenth resistor is connected to one end of the eleventh resistor, the other end of the eleventh resistor is connected to the cathode of the third diode, and the anode of the third diode is connected to the internal network voltage of the newly connected device.

10. The new access device according to claim 9, characterized in that: The power protection circuit comprises: a fourth diode, a third capacitor, a fourth capacitor and a first magnetic bead; The positive pole of the fourth diode is connected to the fifth pin of the external connector, the negative pole of the fourth diode is connected to one end of the third capacitor and one end of the fourth capacitor, the other end of the third capacitor and the other end of the fourth capacitor are grounded, the negative pole of the fourth diode is also connected to one end of the first magnetic bead, and the other end of the first magnetic bead is connected to the internal network voltage.

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