Positive and negative plugging detection system for non-standard Type-C interface

Abstract

The utility model provides a positive and negative plugging detection system for a non-standard Type-C interface, and belongs to the technical field of detection systems. Comprising a circuit board, the circuit board is provided with a bearing part, and the bearing part is used for detecting the insertion state of the non-standard Type-C interface so as to distinguish the forward insertion state and the reverse insertion state of the non-standard Type-C interface; and the number of the amplifiers is two, the two amplifiers are both arranged on the circuit board, the amplifiers are connected with the receiving part in series, and the amplifiers are used for amplifying the insertion state signal of the non-standard Type-C interface detected by the receiving part. According to the utility model, through cooperation of the microswitch, the amplifier, the resistor, the comparator and the indicating lamp in the bearing part, accurate detection and positive and negative insertion judgment of the insertion state of the non-standard Type-C interface are realized; effective protection on the circuit in the case of transient high-voltage impact and overcurrent is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to detection system technical field, especially relate to a kind of for non-standard Type-C interface's positive and negative plug-in detection system. BACKGROUND

[0002] In the era of rapid development of science and technology today, the types of electronic devices are increasingly diverse, and the functions are constantly powerful;Type-C interface with its outstanding performance, such as high-speed data transmission, fast charging, positive and negative can be inserted, and other advantages, in many electronic devices have been widely used;With the continuous progress of technology, non-standard Type-C interface also gradually in some specific field of emerging;For example, in some high-end audio equipment, in order to realize higher quality of audio transmission and more unique design requirements, non-standard Type-C interface will be used;In some professional photography equipment, non-standard Type-C interface may be used to connect special accessories to expand the functions of the device.

[0003] However, the existing plug-in detection technology in the face of non-standard Type-C interface, because the specifications and standards of non-standard Type-C interface are different from the common standard interface, the traditional way of judging positive and negative insertion direction by interface shape, logo, etc. No longer applicable;For example, in some industrial automation control system, the design of non-standard Type-C interface may be more compact, and there is no obvious positive and negative insertion mark, which makes it difficult for operators to accurately determine the insertion direction when connecting the device;In some fields with extremely high requirements for data transmission stability, such as medical equipment, aerospace, etc., incorrect plug-in may cause serious data transmission errors or equipment failure;There have been medical equipment due to non-standard Type-C interface inserted and caused data transmission interruption, affecting the diagnosis and treatment of patients. INVENTION CONTENTS

[0004] The utility model aims at at least in a certain extent solve one of the problems existing in prior art, and for this purpose, provide a kind of for non-standard Type-C interface's positive and negative plug-in detection system, to solve the technical problems that non-standard Type-C interface is difficult to accurately judge positive and negative insertion state in prior art, and when facing transient high voltage impact and overcurrent condition, circuit cannot be effectively protected.

[0005] The utility model discloses a positive and reverse plug detection system for non-standard type-c interface, including: circuit board is equipped with the department of receiving on the circuit board, and the department of receiving is used for detecting the insertion state of non-standard type-c interface to distinguish the positive insertion and reverse insertion state of non-standard type-c interface, amplifier is equipped with two, two amplifiers all set up on the circuit board, and amplifier is connected in series with the department of receiving, and amplifier is used for amplifying the non-standard type-c interface insertion state signal of the department of receiving detection, resistance is equipped with two, two resistances all set up on the circuit board, and two resistances are connected with two amplifiers respectively in series, and resistance is used for adjusting the amplitude and current of non-standard type-c interface insertion state signal after the amplifier amplification, comparator sets up on the circuit board, and the input of comparator is connected with two resistances, and comparator is used for comparing the signal from the resistance adjustment with the preset reference level to judge the positive and reverse insertion state of non-standard type-c interface, indicator lamp is connected in series with comparator, and indicator lamp is used for showing the positive and reverse insertion state of non-standard type-c interface according to the output result of comparator, wherein amplifier can adopt operational amplifier chip to realize, for example, can use the double operational amplifier chip of model LM358, its function is to amplify the weak signal of the department of receiving output, to facilitate the subsequent processing and judgment, the gain of amplifier should be in the reasonable range, both guaranteeing that signal can be amplified fully and avoiding that signal is excessively amplified and leads to distortion, for example, for the signal of pressure sensor output, the gain can be set as 100 times, for the signal of optical sensor output, the gain can be set as 50 times, the input impedance of amplifier should be high, such as greater than 1M omega, and the output impedance should be low, less than 100 omega, to reduce the influence to signal source and subsequent circuit, the bandwidth of amplifier should satisfy the requirement of system, can accurately amplify the frequency component of non-standard type-c interface insertion state signal, and the bandwidth can be set as 100kHz, simultaneously, amplifier should have good temperature stability and anti -interference ability, ensures stable work under different working environment, when the temperature range is -20 DEG C to 80 DEG C, the gain change should be less than plus or minus 5%, resistance can change the amplitude and current of signal by adjusting its resistance, to make it meet the input requirement of comparator, for example, can use the metal film resistance of precision of plus or minus 1%, and the resistance is 10k omega and 20k omega respectively, two resistances can adjust the signal of positive insertion and reverse insertion state respectively, to ensure the accuracy and stability of signal, and the resistance value of resistance should have higher precision and stability, can accurately adjust the amplitude and current of signal, the power of resistance should satisfy the requirement of system, can bear certain current and power, avoids damaging in the working process because of overheating, for example, the power can select 0.25W resistor; the temperature coefficient of the resistor is small, such as less than ± 50ppm / ℃, to reduce the influence of temperature change on its resistance; at the same time, the installation of the resistor should be firm and reliable, to avoid changes in resistance due to vibration or other factors; the comparator can use a dual comparator chip with model LM393, and the comparison accuracy of the comparator should reach a certain standard, which can accurately judge the positive and negative insertion state of the interface; the offset voltage of the comparator should be less than 1mV, and the resolution should be able to distinguish signal changes within 10mV; the response speed of the comparator should be fast, and the response time should be less than 100μs; the input impedance of the comparator should be high, such as greater than 1MΩ, and the output impedance should be low, less than 100Ω, to reduce the influence on the signal source and the subsequent circuit; at the same time, the reference level of the comparator should be carefully set to ensure that the positive and negative insertion states can be accurately distinguished; for the positive insertion state, the reference level can be set to 2V, and for the negative insertion state, the reference level can be set to 1V; the brightness of the indicator light should be high enough to clearly display the state of the interface in different environments.

[0006] In a further embodiment, a power supply is connected to the circuit board, and the power supply is used to supply power to the circuit board. The power supply can be an external DC power adapter with an output voltage of 5V and an output current of 1A. Alternatively, the power supply can be an internal battery pack, such as two 18650 lithium-ion batteries connected in series, which has an output voltage of 7.4V in a full charge state and provides a stable 5V voltage to the circuit board after a voltage stabilizing circuit. The output voltage of the power supply should meet the operating voltage requirements of each component on the circuit board. When the load varies in the range of 0-500mA, the output voltage variation should be less than ±5%. The output current of the power supply should be able to meet the needs of the system in different working states, and have a certain margin. For the entire detection system, the maximum working current is 800mA, and the output current of the power supply should be greater than 1A. The power supply should have functions such as overvoltage protection, overcurrent protection and short circuit protection to prevent damage to the system due to abnormal external power supply. The overvoltage protection threshold can be set to 6V, the overcurrent protection threshold is 1.2A, and the short circuit protection response time is less than 100ms. For the internal battery pack, appropriate capacity and long service life batteries should be selected, and a reasonable charging management circuit should be designed to ensure that the battery can be safely and efficiently charged and discharged. The battery capacity can be selected as 2600mAh, the charging current is 1A, and the charging cutoff voltage is 8.4V.

[0007] In a further embodiment, a self-resetting fuse is connected in series between the power supply and the circuit board, and is used to automatically limit the current when an overcurrent occurs in the circuit, wherein the self-resetting fuse can use a self-resetting fuse of model PTC1206 with a rated current of 1A, and the rated current of the self-resetting fuse should be selected according to the maximum working current of the system and safety requirements; when the system is working normally, the current should be less than 80% of the rated current of the self-resetting fuse, i.e. 0.8A; the response time of the self-resetting fuse should be short, and it should act quickly when an overcurrent occurs, with a response time less than 1s; the recovery time of the self-resetting fuse should be reasonable, both to ensure that it can recover to normal work in time after the fault is eliminated, and not to be too fast to avoid triggering again when the fault is not completely eliminated; the recovery time can be set to 10s-30s.

[0008] In a further embodiment, a transient voltage suppression diode is connected in series between the circuit board and the ground, and is used to clamp the excessive voltage at a safe level when a transient high voltage impact occurs, wherein the transient voltage suppression diode (TVS) can use a TVS diode of model P6KE6.8CA with a clamping voltage of 6.8V; the clamping voltage of the TVS should be selected according to the voltage withstand level of each element in the system, to ensure that it can clamp the voltage within a safe range when a transient high voltage impact occurs; for this system, the clamping voltage should be less than 80% of the maximum voltage withstand value of each element; the response time of the TVS should be extremely short, and it should respond to high voltage in an instant, with a response time less than 1ns; the power capacity of the TVS should meet the requirements of the system, and be able to withstand the energy of the transient high voltage impact; for a possible 1000V transient high voltage, the power capacity of the TVS should be greater than 1W; at the same time, the installation position of the TVS should be close to the element that may be impacted by high voltage, to reduce the influence of parasitic inductance and capacitance and improve the protection effect; the installation distance can be controlled within 5mm.

[0009] In a further embodiment, at least two micro switches are provided in the receiving part, and the two micro switches correspond to the positive insertion state and the reverse insertion state of the non-standard Type-C interface respectively, and are used to accurately detect the interface insertion state and deliver signals, wherein the micro switch can use a micro switch of model KW12-3 with a trigger force of 0.5N, the trigger force of the micro switch should be moderate, both to ensure that it can be triggered reliably when the interface is inserted, and not to produce false signals due to false triggering; the trigger force error should be less than ±0.1N; the service life of the micro switch should be long, and it should be able to maintain good performance in a long period of use, with a service life greater than 100000 times; the installation position of the micro switch should be carefully designed to ensure that it can accurately detect the positive insertion and reverse insertion states of the interface; the installation position deviation should be less than 1mm; at the same time, the electrical parameters of the micro switch should meet the requirements of the system, such as a small contact resistance, less than 50mΩ, and a high insulation resistance, greater than 100MΩ.

[0010] In a further embodiment, the indicator light is divided into two parts, and the two parts of the indicator light correspond to the positive insertion state and the reverse insertion state of the non-standard Type-C interface respectively, wherein the indicator light can use a 3mm double-color LED, and the red and green colors are switched obviously; the two parts of the indicator light should have obvious differences, so that the user can see the insertion direction of the interface at a glance; the luminous intensity ratio of the red LED and the green LED should be greater than 2:1; the brightness and the flicker frequency of the indicator light should be moderate, which can attract the user's attention without being too dazzling or interfering with the user's use; when the environmental light intensity is 500 lux, the brightness of the red LED and the green LED should be greater than 100 mcd and 150 mcd respectively, and the flicker frequency can be set to 1Hz-2Hz; at the same time, the driving circuit of the indicator light should be reasonably designed to ensure that the working state of the indicator light can be stably controlled; the driving current error should be less than ±10%.

[0011] In a further embodiment, the amplifier has high gain and low noise characteristics to ensure accurate amplification of the insertion state signal, the resistor has high precision and stability to accurately adjust the amplitude and current of the signal, and the comparator has fast response and high resolution to accurately determine the positive and reverse insertion state of the non-standard Type-C interface.

[0012] Beneficial effects: 1. Through the cooperation of the micro switch in the receiving part and the amplifier, resistor, comparator and indicator light, accurate detection and positive and reverse insertion judgment of the non-standard Type-C interface insertion state are realized. The micro switch detects the interface insertion state and generates an electrical signal, the amplifier enhances the strength and stability of the signal, the signal adjusted by the resistor is input to the comparator for comparison with the reference level, and finally the positive and reverse insertion state is displayed by the indicator light. The effect of enabling the user to quickly and accurately determine the interface insertion direction is achieved, which avoids wasting time due to repeated attempts to insert, reduces the risk of damage to the interface and equipment caused by incorrect insertion, and improves the efficiency and service life of the equipment connection.

[0013] 2. Through the cooperation of the transient voltage suppression diode and the self-resetting fuse with the circuit, effective protection of the circuit in the face of transient high voltage impact and overcurrent is realized; the transient voltage suppression diode is connected between the circuit board and the ground, and when a transient high voltage impact occurs, it quickly conducts to clamp the excessively high voltage at a safe level, protecting the sensitive components in the circuit; the self-resetting fuse is connected in series in the power supply circuit, and when the circuit has an overcurrent, the resistance increases rapidly to automatically limit the current, and after troubleshooting, it automatically returns to a low resistance state, allowing the circuit to return to normal operation; the effect of improving system stability and reliability is achieved, reducing the probability of equipment failure due to circuit problems. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the present application or prior art, the drawings needed to be used in the description of the embodiments or prior art will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 The circuit diagram of the present application.

[0016] The reference signs in the drawings are as follows: 1, power supply; 2, circuit board; 3, receiving part; 4, amplifier; 5, resistor; 6, comparator; 7, indicator light; 8, self-recovery fuse; 9, transient voltage suppression diode. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions in the present application are described clearly and completely. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0018] The present application provides a positive and negative plug detection system for non-standard Type-C interface, which solves the technical problems that it is difficult to accurately determine the positive and negative plug state for non-standard Type-C interface in the prior art, and the circuit cannot be effectively protected when facing transient high voltage impact and overcurrent. In actual use, the purpose of accurately determining the plug state and protecting the circuit when facing transient high voltage impact and overcurrent is achieved.

[0019] In order to better understand the above technical solutions, the above technical solutions will be described in detail in combination with the drawings in the specification and specific embodiments.

[0020] Reference Figure 1The utility model provides a positive and negative plug detection system for non-standard Type-C interface, which comprises a circuit board 2, a receiving part 3 provided on the circuit board 2, the receiving part 3 being used to detect the insertion state of the non-standard Type-C interface to distinguish the positive and negative insertion states of the non-standard Type-C interface, two amplifiers 4, both of which are provided on the circuit board 2 and connected in series with the receiving part 3, the amplifiers 4 being used to amplify the non-standard Type-C interface insertion state signal detected by the receiving part 3, two resistors 5, both of which are provided on the circuit board 2 and connected in series with the two amplifiers 4 respectively, the resistors 5 being used to adjust the amplitude and current of the non-standard Type-C interface insertion state signal amplified by the amplifiers 4, a comparator 6 provided on the circuit board 2, the input end of the comparator 6 being connected with the two resistors 5, the comparator 6 being used to compare the signal adjusted by the resistors 5 with a preset reference level to determine the positive and negative insertion states of the non-standard Type-C interface, and an indicator lamp 7 connected in series with the comparator 6, the indicator lamp 7 being used to display the positive and negative insertion states of the non-standard Type-C interface according to the output result of the comparator 6.

[0021] The circuit board 2 and the components provided thereon, such as the receiving part 3, the amplifiers 4, the resistors 5, the comparator 6 and the indicator lamp 7, work cooperatively to accurately detect and display the positive and negative insertion states of the non-standard Type-C interface.

[0022] A power supply 1 is connected with the circuit board 2 and used to supply power to the circuit board 2.

[0023] The power supply 1 is connected with the circuit board 2 to provide power support for the entire detection system, ensuring that each component can work normally.

[0024] A self-resetting fuse 8 is connected in series between the power supply 1 and the circuit board 2, and used to automatically limit the current when overcurrent occurs in the circuit.

[0025] The self-resetting fuse 8 is connected in series between the power supply 1 and the circuit board 2. When overcurrent occurs in the circuit, the self-resetting fuse 8 automatically functions to limit the size of the current, protecting other components in the circuit from being damaged by excessive current. After the fault is eliminated, the self-resetting fuse 8 can automatically return to the normal state, so that the circuit can continue to work normally.

[0026] A transient voltage suppression diode 9 is connected in series between the circuit board 2 and the ground, and used to clamp the excessively high voltage at a safe level when a transient high voltage impact occurs.

[0027] The positive electrode of the transient voltage suppression diode 9 is connected in series with the circuit board 2, and the negative electrode is grounded; when a transient high voltage impact occurs in the circuit, the transient voltage suppression diode 9 will quickly conduct to clamp the excessive voltage at a safe level, protecting each element on the circuit board 2 from high voltage damage.

[0028] At least two micro switches are arranged in the receiving part 3, and the two micro switches correspond to the positive insertion state and the reverse insertion state of the non-standard Type-C interface respectively, for accurately detecting the interface insertion state and transmitting signals.

[0029] The two micro switches correspond to the positive insertion state and the reverse insertion state of the non-standard Type-C interface respectively; when the interface is inserted, the micro switch will be triggered, so as to accurately detect the insertion state of the interface and transmit the signal to the subsequent circuit for processing.

[0030] The indicator light 7 is divided into two parts, and the two parts of the indicator light 7 correspond to the positive insertion state and the reverse insertion state of the non-standard Type-C interface respectively.

[0031] The two parts correspond to the positive insertion state and the reverse insertion state of the non-standard Type-C interface respectively; through different display modes (such as different colors, different flashing frequencies, etc.), users can more intuitively understand the specific insertion state of the interface.

[0032] The amplifier 4 has high gain and low noise characteristics to ensure accurate amplification of the insertion state signal, the resistor 5 has high precision and stability to accurately adjust the amplitude and current of the signal, and the comparator 6 has fast response and high resolution to accurately determine the positive and reverse insertion states of the non-standard Type-C interface.

[0033] The amplifier 4 has high gain characteristics and can greatly amplify weak insertion state signals, while having low noise characteristics to reduce noise interference on the signal, ensuring accurate amplification of the insertion state signal. The resistor 5 has high precision and can accurately adjust the amplitude and current of the signal, and has stability, which can maintain good performance under different working conditions. The comparator 6 has the characteristics of fast response, which can quickly process the input signal and output the judgment result, and has high resolution, which can accurately distinguish different signal states, so as to accurately determine the positive and reverse insertion states of the non-standard Type-C interface.

[0034] In use, when the non-standard Type-C interface is inserted, the micro switch in the receiving part 3 on the circuit board 2 will immediately start working; the receiving part 3 uses two micro switches, corresponding to the positive and reverse insertion states of the non-standard Type-C interface respectively, when the interface is inserted, the micro switch will be triggered, generating a corresponding electrical signal, so as to accurately detect the insertion state of the interface and transmit the signal; then, the non-standard Type-C interface insertion state signal detected by the micro switch in the receiving part 3 is transmitted to the amplifier 4 connected in series therewith; the amplifier 4 amplifies the originally weak signal, enhances the strength of the signal, so as to facilitate subsequent processing and analysis; the amplified signal is then transmitted to the resistor 5 connected in series therewith; the role of the resistor 5 is to adjust the amplitude and current of the signal, so that it meets the input requirements of the comparator 6; by accurately adjusting the amplitude and current of the signal, it can be ensured that the subsequent comparator 6 can accurately process and judge the signal; then, the adjusted signal enters the comparator 6; the comparator 6 compares it with the preset reference level; if the signal is greater than the reference level, the comparator 6 judges that it is a positive insertion state; if the signal is less than the reference level, it is judged as a reverse insertion state; finally, the output result of the comparator 6 is transmitted to the indicator lamp 7 connected in series therewith; when it is judged as a positive insertion state, the indicator lamp 7 displays in a specific way, for example, the indicator lamp 7 representing positive insertion lights up or flashes, when it is judged as a reverse insertion state, the indicator lamp 7 displays in another way, for example, the indicator lamp 7 representing reverse insertion lights up or flashes; during the whole working process, the power supply 1 is connected with the circuit board 2, providing stable power support for each element of the system, ensuring that it can work normally; the self-resetting fuse 8 is connected in series between the power supply 1 and the circuit board 2, when overcurrent occurs in the circuit, the self-resetting fuse 8 will automatically limit the current, protecting other elements in the circuit from being damaged by excessive current; the positive electrode of the transient voltage suppression diode 9 is connected in series with the circuit board 2, and the negative electrode is grounded, when a transient high voltage impact occurs, it will be turned on and clamp the excessive voltage at a safe level, protecting the circuit from damage caused by high voltage.

[0035] The figures expressed in the drawings are example figures, and the purpose is only to more intuitively show the key structure and connection relationship of the positive and reverse insertion detection system for the non-standard Type-C interface; in actual application, adjustments and optimizations can be made according to specific needs, and the data given in the specification are all example data, and cannot completely represent the specific values in actual application; in the actual production and use process, these data can be adjusted and optimized according to different non-standard Type-C interface specifications, use environment and specific performance requirements.

[0036] The utility model covers any alternative, modification, equivalent method and scheme which are made on the essence and range of the utility model. In order to make the public have the thorough understanding of the utility model, the specific details are explained in the above preferred embodiment of the utility model, and the utility model can also be completely understood without the description of these details for the person skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the utility model, the well-known method, process, flow, element and circuit etc. are not explained in detail.

[0037] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the principle of the utility model, a plurality of improvements and refinements can also be made, and these improvements and refinements should also be regarded as the protection range of the utility model.

Claims

1. A positive and negative plug detection system for non-standard Type-C interface, comprising a circuit board (2), characterized in that: The circuit board (2) is provided with a receiving part (3) for detecting the insertion state of a non-standard Type-C interface to distinguish between the normal and reverse insertion states of the non-standard Type-C interface. Two amplifiers (4) are provided, both of which are arranged on the circuit board (2) and are connected in series with the receiving part (3). The amplifiers (4) are used to amplify the non-standard Type-C interface insertion state signal detected by the receiving part (3). Two resistors (5) are provided, both of which are arranged on the circuit board (2) and are connected in series with the two amplifiers (4). The resistors (5) are used to adjust the amplitude and current of the non-standard Type-C interface insertion state signal amplified by the amplifiers (4). A comparator (6) is arranged on the circuit board (2). The input end of the comparator (6) is connected to the two resistors (5). The comparator (6) is used to compare the signal adjusted by the resistors (5) with a preset reference level to determine the normal and reverse insertion states of the non-standard Type-C interface. An indicator light (7) is connected in series with the comparator (6). The indicator light (7) is used to display the normal and reverse insertion states of the non-standard Type-C interface according to the output of the comparator (6).

2. The plug-in detection system for non-standard Type-C interface according to claim 1, wherein, Further comprising: A power supply (1) connected to the circuit board (2) for supplying power to the circuit board (2).

3. The plug-in detection system for non-standard Type-C interface according to claim 2, wherein, Further comprising: A self-resetting fuse (8) connected in series between the power supply (1) and the circuit board (2). The self-resetting fuse (8) is used to automatically limit the current when an overcurrent condition occurs in the circuit.

4. The plug-in detection system for non-standard Type-C interface according to claim 1, wherein, Further comprising: A transient voltage suppression diode (9) connected in series with the circuit board (2) at the positive electrode and grounded at the negative electrode. The transient voltage suppression diode (9) is used to clamp excessive voltage at a safe level when a transient high voltage surge occurs.

5. The system of claim 1, wherein: The receiving part (3) is provided with at least two micro switches, each corresponding to the normal and reverse insertion states of the non-standard Type-C interface, for accurately detecting the interface insertion state and transmitting signals.

6. The plug-in detection system for non-standard Type-C interface according to claim 1, characterized in that: The indicator light (7) is divided into two parts, each corresponding to the normal and reverse insertion states of the non-standard Type-C interface.

7. The system of claim 1, wherein: The amplifiers (4) have high gain and low noise characteristics to ensure accurate amplification of the insertion state signal. The resistors (5) have high precision and stability to accurately adjust the amplitude and current of the signal. The comparator (6) has fast response and high resolution to accurately determine the normal and reverse insertion states of the non-standard Type-C interface.

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