Plugging detection circuit and electrostatic alarm

Abstract

The utility model discloses a plugging detection circuit and an electrostatic alarm. The plugging detection circuit comprises a first contact connected with a grounding end; a second contact; in the first state, the second contact is connected with the first contact, the second contact is grounded, and a level signal of the second contact is low level; in the second state, the second contact and the first contact are disconnected, the second contact is connected with the power supply, and the level signal is high level; and the processor is connected with the second contact and used for receiving the level signal and recording the number of times that the interrupt signal is triggered by the level signal when the level changes. According to the invention, detection of the number of plugging times in the use process of the plugging switch is realized.

Description

Technical Field

[0001] The present application relates to the field of electrical safety technology, and in particular to a plug-in detection circuit and an electrostatic alarm. Background Art

[0002] The static electricity release of the wires on the production line is mainly completed by grounding the electrostatic ring. The electrostatic ring is inserted into the electrostatic alarm and then grounded through the electrostatic alarm. During the working process of the electrostatic alarm, the electrostatic alarm and the electrostatic ring need to be plugged and unplugged during each electrostatic release process. The plug-in and unplugging interface between the electrostatic ring and the electrostatic alarm will age and be damaged as the number of plug-ins and unplugging increases.

[0003] In order to solve the technical problem that aging damage caused by the number of plug-in and unplugging times between the electrostatic ring and the electrostatic alarm is difficult to detect, a plug-in detection circuit and an electrostatic alarm are needed to detect the number of plug-in and unplugging times between the electrostatic ring and the electrostatic alarm to manage the life of the electrostatic release equipment. Summary of the invention

[0004] The present application provides a plug-in detection circuit and an electrostatic alarm to detect the number of plug-ins and plug-outs during the use of a plug-in switch.

[0005] In a first aspect, the present application provides a plug-in detection circuit, comprising:

[0006] A first contact point connected to a ground terminal;

[0007] The second contact; in the first state, the second contact is connected to the first contact, the second contact is grounded, and the level signal of the second contact is low level; in the second state, the second contact is disconnected from the first contact, the second contact is connected to the power supply, and the level signal is high level;

[0008] The processor is connected to the second contact and is used for receiving the level signal and recording the number of times the level signal triggers the interrupt signal when the level changes.

[0009] The present application detects the number of times an interrupt signal is triggered when the level signal of the first contact and the second contact changes in different working states, and detects the number of times a plug-in switch in the electrostatic alarm is plugged in and out, so as to manage the life of the electrostatic release device.

[0010] In one implementation, a processor includes a first interface and a second interface;

[0011] The processor receives the level signal through the first interface and the second interface respectively.

[0012] The present application synchronously performs detection of the working state of the electrostatic release device and detection of changes in the electrical connection state of the electrostatic release device by receiving a level signal and an interrupt signal.

[0013] In one implementation, in the second state, a pull-up resistor is provided between the second contact and the power supply.

[0014] In one implementation, the plug detection circuit provided by the present application further includes:

[0015] The third contact is a fixed contact.

[0016] In one implementation, the first contact, the second contact, and the third contact are different switch contacts of a multi-core audio socket.

[0017] In one implementation, the first contact is a middle sleeve contact of the dual-core audio jack; the second contact is a middle ring contact of the dual-core audio jack; and the third contact is a tip sleeve contact of the dual-core audio jack.

[0018] In a second aspect, the present application also provides an electrostatic alarm, comprising at least one electrostatic power socket and at least one grounding socket, wherein the above-mentioned plug-in detection circuit is arranged in the electrostatic power socket and / or the grounding socket.

[0019] In one implementation, the static electricity alarm provided by the present application further includes at least one of an LED and a buzzer connected to the processor.

[0020] In one implementation, the static electricity alarm provided by the present application further includes a power interface connected to a power source.

[0021] In one implementation, the socket types of the static power socket and the grounding socket are two-core audio sockets. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings used in the description of the embodiments. The drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a plug-in detection circuit provided in this application;

[0024] Figure 2 A schematic diagram of the structure of a dual-core TRS plug provided in this application;

[0025] Figure 3 A schematic diagram of the structure of a three-core TRS plug provided in this application;

[0026] Figure 4 A schematic diagram of the structure of an electrostatic alarm provided in this application;

[0027] Figure 5A schematic diagram of the structure of a socket and a plug in a static electricity alarm provided in this application. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. The embodiments described below are only some embodiments of the present application. For ordinary technicians in this field, other embodiments can be obtained based on these embodiments without creative work. The adjustments and improvements made without departing from the concept of the present application all belong to the protection scope of the present application.

[0029] In order to simplify the drawings, only the parts related to the corresponding embodiments are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, only part of the components with the same structure or function in some figures are schematically drawn, and there may be more or fewer components with the same structure or function in reality.

[0030] In the embodiments of the present application, unless otherwise clearly specified and limited, ordinal numbers such as "first", "second", etc. are only used to distinguish and describe associated objects, and cannot be understood as indicating or implying the relative importance or order between associated objects; in addition, it does not represent the number of associated objects. "Multiple" includes two or more, and other quantifiers are similar. " / " is used to describe the relationship between associated objects, which indicates the "or" relationship between associated objects. "And / or" is used to describe the relationship between associated objects, which includes any combination relationship between associated objects, for example, "a and / or b" includes: "a alone", "b alone", or "a and b".

[0031] In the embodiments of the present application, "connection" includes direct connection or indirect connection, which may be directly connected through a medium (eg, a wire, a trace, etc.), or may be indirectly connected through other elements, or may be internally connected.

[0032] During the static discharge process, the static alarm is required to cooperate with the static power source to discharge static electricity. The working principle of the static alarm is to determine the charge accumulation by detecting the potential difference between the monitored object and the ground. When poor static grounding is detected or the potential difference exceeds the preset safety range, the static alarm will sound an audible and visual alarm to prompt the staff to take timely measures, such as re-grounding or adjusting the working environment, to avoid static danger.

[0033] Static sources include ESD wearables (e.g., static rings), also known as anti-static discharge wearables or ESD (Electrostatic Discharge) wristbands, which are personal protective equipment used to prevent electrostatic discharge. It is usually made of conductive materials, such as conductive rubber or cloth and equipped with a wire, the other end of which is connected to the grounding system. ESD wearables are designed to safely conduct static charge through the human body to the ground, thereby reducing or eliminating static electricity accumulation and preventing electrostatic discharge from causing damage to sensitive electronic equipment.

[0034] During the electrostatic release process, the electrostatic ring and the electrostatic alarm are connected by a plug-in switch to achieve electrostatic grounding release. When the number of plug-in and pull-out times of the plug-in and pull-out switch between the electrostatic ring and the electrostatic alarm increases, the plug-in and pull-out interface will age and be damaged. In order to avoid electrical safety hazards caused by aging of the plug-in and pull-out interface, the number of plug-in and pull-out times of the plug-in and pull-out switch needs to be detected.

[0035] First, please refer to Figure 1 , Figure 1 The present application provides a plug-in detection circuit structure schematic diagram, the present application provides a plug-in detection circuit, including a first contact 1, a second contact 2 and a processor 3, wherein the first contact 1 is connected to the ground terminal; the second contact 2 is connected to the first contact 1 in the first state, the second contact 2 is grounded, and the level signal of the second contact 2 is a low level; in the second state, the second contact 2 is disconnected from the first contact 1, the second contact 2 is connected to the power supply VCC, and the level signal is a high level; the processor 3 is connected to the second contact 2, and is used to receive the level signal and record the number of times the level signal triggers an interrupt signal when the level changes. The first state is the non-use state of the electrostatic alarm, at which time the first contact 1 and the second contact 2 set at the socket in the electrostatic alarm are connected and grounded, and the second state is the use state of the electrostatic alarm, at which time the second contact 2 is connected to the power supply VCC of the electrostatic alarm.

[0036] The types of processor 3 include but are not limited to MCU, MPU, DSP and FPGA. MCU is widely used in embedded systems due to its high integration, low cost and low power consumption; MPU is suitable for occasions requiring complex data processing due to its powerful computing power; DSP focuses on efficient digital signal processing tasks; and FPGA is suitable for rapid development and customization requirements due to its programmability and flexibility. In this application, MCU can be selected as the selection type of processor 3 to cooperate with contact 1 and contact 2 to realize electrostatic alarm and the switching number of contact 2 level state monitoring, and then the service life of the electrostatic alarm can be judged according to the switching number of contact 2 level state.

[0037] In one implementation, please continue to refer to Figure 1The processor 3 includes a first interface 3.1 and a second interface 3.2, and the processor 3 receives level signals through the first interface 3.1 and the second interface 3.2 respectively. The first interface 3.1 receives the level signal, and the processor 3 receives the level signal through the first interface 3.1 to detect the working state of the electrostatic discharge device, and the second interface 3.2 receives the interrupt signal, and the processor 3 receives the interrupt signal through the second interface 3.2 to detect the level change of the electrostatic alarm.

[0038] When the level signal received by the processor 3 through the first interface 3.1 is a high level signal, it is determined that the electrostatic alarm is in working state at this time. When the level signal received by the processor 3 through the first interface 3.1 is a low level signal, it is determined that the electrostatic alarm is not in working state at this time. The processor 3 refers to the level signal received by the first interface 3.1 and the interrupt signal received by the second interface 3.2 to determine the plug-in and unplug state when the level of the electrostatic alarm changes. When the level signal is a high level signal and an interrupt signal is received, the processor determines that the electrostatic ring is unplugged from the electrostatic alarm at this time. When the level signal is a low level signal and an interrupt signal is received, the processor determines that the electrostatic ring is inserted into the electrostatic alarm at this time. The first interface 3.1 and the second interface 3.2 can share the same level signal interface, or they can use different IO interfaces respectively.

[0039] In one implementation, please continue to refer to Figure 1 , a pull-up resistor 6 is set between the second contact 2. In the second state, the pull-up resistor 6 is connected between the second contact 2 and the power supply VCC. When there is no other low-level (0V) signal input on the signal line, the pull-up resistor 6 will pull the signal line to a high level close to the power supply VCC voltage. In this way, even if the signal line is affected by external interference or noise from the internal circuit, it can be maintained in a certain high-level state. For example, the parameter of the pull-up resistor 6 can be set to 100K.

[0040] In one implementation, please continue to refer to Figure 1 The plug-in detection circuit provided in the present application also includes: a third contact 5, which is a fixed installation contact.

[0041] In one implementation, the first contact 1, the second contact 2 and the third contact 5 are different switch contacts of the multi-core audio socket. When the multi-core audio plug is not inserted into the multi-core audio socket in the electrostatic alarm, the first contact 1 and the second contact 2 of the multi-core audio socket are connected, and the multi-core audio socket closes the grounding path between the first contact 1 and the second contact 2 in the circuit, so that the plug-in detection circuit is in a first state, and the electrostatic alarm is in a non-use state. When the multi-core audio plug is inserted into the multi-core audio socket in the electrostatic alarm, the first contact 1 and the second contact 2 of the multi-core audio socket are disconnected, and the electrostatic ring forms a loop grounding through the metal sheet configured on the electrostatic ring, the multi-core audio plug, and the first contact 1 in the multi-core audio socket, and releases the static electricity of the wearer of the electrostatic ring, so that the plug-in detection circuit is in a second state, and the second contact 2 forms a loop with the metal sheet configured on the electrostatic ring. The processor 3 receives the level signal in the loop through the second contact for alarm detection, and the electrostatic alarm is in use.

[0042] In one implementation, the plug-in socket in the plug-in detection circuit uses a double-core audio socket, which cooperates with the double-core audio plug in the electrostatic ring. The first contact 1 is the middle sleeve contact of the double-core audio socket; the second contact 2 is the middle ring contact of the double-core audio socket; the third contact 5 is the tip sleeve contact of the double-core audio socket. In this embodiment, the scheme uses a double-core audio plug and a double-core audio socket, and can also use a three-core audio plug and a three-core audio socket, a four-core audio plug and a four-core audio socket, or other multi-core audio plugs and multi-core audio sockets.

[0043] TRS socket (Tip-Ring-Sleeve) is a common connector. The principle of TRS socket is based on its three independent contact points, which are used to transmit signals and provide grounding. The three contact points are: Tip: This is the part located at the front end of the connector, usually used to transmit the first signal. Ring: The part located after the Tip, it is used to transmit the second signal. Sleeve: This is the outer part of the connector, which is always connected to the ground (GND). The role of the Sleeve is to provide a reference ground for the signal, ensure stable transmission of the signal and reduce interference. The design of TRS sockets allows them to support balanced and unbalanced audio transmission. In balanced transmission, the Tip and Ring transmit positive and negative phase signals respectively, while the Sleeve provides grounding. This configuration helps to resist electromagnetic interference in long-distance transmission. Unbalanced transmission only uses the Tip to transmit signals, and the Ring and Sleeve are combined for grounding.

[0044] In practical applications, the TRS socket can be a simple two-core design. Figure 2 , attached Figure 2 This is a schematic diagram of the structure of a double-core TRS plug. Figure 2 The first contact 1 is the middle contact of the double-core audio socket and Figure 2The second contact 2 is the ring contact of the dual-core audio jack and the Figure 2 The power is on when the contact 12 (storage communication PIN) of the middle plug touches; the TRS socket can also be a more complex multi-core design, please refer to the attached Figure 3 , attached Figure 3 This is a schematic diagram of the structure of a three-core TRS plug. Figure 3 The middle contact 13 is the middle sleeve contact of the three-core audio socket (metal contact GND); contacts 14 and 15 are the middle ring contacts of the three-core audio socket (storing communication PIN); contact 16 is the tip sleeve contact of the three-core audio socket (VCC contact). The main reason for selecting the dual-core audio plug and dual-core audio socket is to match the 3.5mm headphone socket, which is the common physical interface in the current electrostatic alarm. Synchronization can save the cost of plugs and sockets.

[0045] In one implementation, Figure 5 As shown, the plug includes two contacts: contact 11 and contact 12. The socket includes a first contact 1, a second contact 2, a third contact 5, a fourth contact 16 and a fifth contact 17. When the plug is not inserted, the third contact 5 in the socket is independently connected to the shell, and the first contact 1 and the second contact 2 in the socket are connected together to access VCC and are at a high level. When the plug is inserted, the third contact 5 and the first contact 1 are connected, the first contact 1 and the second contact 2 are disconnected, the fourth contact 16 and the fifth contact 17 are disconnected, the 12 contact and the fifth contact 17 are connected, the contact 11, the third contact 5 and the first contact 1 are connected, the second contact 2 is disconnected and grounded to a low level, and the level is detected by the processor connected to the second contact 2. During the use of the static alarm, a loop is formed by the skin of the human body that contacts the static ring through the first contact 1, the second contact 2, the fourth contact 16 and the fifth contact 17.

[0046] In the second aspect, based on the same technical concept of the above embodiment, the present application also provides a static alarm, please refer to Figure 4 , Figure 4 The structural schematic diagram of the static electricity alarm provided in the present application includes at least one static electricity power socket 8 and at least one grounding socket 9, and the above-mentioned plug-in detection circuit is set in the static electricity power socket and / or the grounding socket.

[0047] In one implementation, please continue to refer to Figure 4 The static electricity alarm provided in the present application also includes an alarm 4 connected to the processor 3. The alarm 4 includes at least one of an LED and a buzzer. When the number of interruption signals recorded by the processor in the static electricity alarm exceeds a threshold, a second alarm signal is triggered, and the alarm prompts the user that the number of plugging and unplugging times between the static electricity release device and the static electricity ring exceeds the safe use range.

[0048] In one implementation, please continue to refer to Figure 4 The static electricity alarm provided in the present application also includes a power interface 7 connected to a power source. The static electricity alarm may also be provided with a fixing position 10 to fix and support the alarm structure.

[0049] In one implementation, the socket types of the static power socket and the grounding socket are two-core audio sockets.

[0050] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. In addition, the above embodiments can be freely combined as needed.

Claims

1. A plug-in detection circuit, characterized in that: include: A first contact point connected to a ground terminal; Second contact point; In a first state, the second contact is connected to the first contact, the second contact is grounded, and the level signal of the second contact is a low level; In the second state, the second contact and the first contact are disconnected, the second contact is connected to a power source, and the level signal is a high level; The processor is connected to the second contact and is used to receive the level signal and record the number of times the level signal triggers an interrupt signal when the level changes.

2. The plug-in detection circuit according to claim 1, characterized in that: The processor includes a first interface and a second interface; The processor receives the level signal through the first interface and the second interface respectively.

3. The plug-in detection circuit according to claim 1, characterized in that: In the second state, a pull-up resistor is provided between the second contact and the power supply.

4. The plug-in detection circuit according to claim 1, characterized in that: Also includes: The third contact is a fixed installation contact.

5. The plug-in detection circuit according to claim 4, characterized in that: The first contact, the second contact and the third contact are different switch contacts of the multi-core audio socket.

6. The plug-in detection circuit according to claim 5, characterized in that: The first contact is a sleeve contact in a dual-core audio socket; the second contact is a ring contact in a dual-core audio socket.

7. An electrostatic alarm, characterized in that: It comprises at least one static power socket and at least one grounding socket, wherein the static power socket and / or the grounding socket are provided with the plugging and unplugging detection circuit as claimed in any one of claims 1 to 6.

8. The static electricity alarm according to claim 7, characterized in that: Also included is at least one of an LED and a buzzer connected to the processor.

9. The static electricity alarm according to claim 7, characterized in that: Also included is a power supply interface connected to the power supply.

10. The static electricity alarm according to any one of claims 7 to 9, characterized in that: The socket types of the static power socket and the grounding socket are double-core audio sockets.

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