Connector module detection device and detection method

Abstract

The invention provides a connector module detection device and method. The device comprises a constant current source, a signal amplification module, a signal sampling module, a comparison module and a system main processor. Wherein the constant current source is used for providing stable current for two test ends of a connector module to be detected; the signal amplification module is used for amplifying the voltage difference between the two test ends, the output end of the signal amplification module is connected with the comparison module and the signal sampling module, and the signal sampling module is used for collecting the initial voltage of the connector module in the initial state; the comparison module is used for comparing the amplification signal output by the signal amplification module with a reference voltage and outputting a comparison result to the system main processor; and the system main processor is used for determining a detection result of the connection module according to the comparison result and the initial voltage and generating a reference voltage. According to the invention, abnormal conditions such as poor contact of the connector can be detected more quickly and accurately.

Description

Technical Field

[0001] The present invention relates to the technical field of product detection, and more specifically, to a connector module detection device and a detection method thereof. Background Art

[0002] With the development of consumer electronic products and the continuous improvement of technology, in order to improve the convenience and versatility of product assembly, connectors are usually used for signal transmission between various functional components of the product, such as a plug-in connection method in which a male head and a female head are matched, or a crimping connection method is used. However, this type of connection method is prone to poor contact, or during use, due to interference from factors such as shaking, the contact between the male head and the female head is abnormal, resulting in imperfect signal transmission and poor product functionality.

[0003] Currently, connector testing is usually performed using a multimeter. However, this traditional testing method not only takes too long to sample, but also cannot effectively detect products with poor contact due to factors such as product shaking. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a connector module detection device and detection method, which can improve the detection efficiency of connector contact anomalies and detect slight changes with higher detection accuracy and greater stability.

[0005] The connector module detection device provided by the present invention includes a constant current source, a signal amplification module, a signal sampling module, a comparison module and a system main processor; wherein the constant current source is used to provide a stable current to the two test ends of the connector module to be detected; the signal amplification module is used to amplify the voltage difference between the two test ends, and the output end of the signal amplification module is respectively connected to the comparison module and the signal sampling module; the signal sampling module is used to collect the initial voltage of the connector module in the initial state; the comparison module is used to compare the amplified signal output by the signal amplification module with the reference voltage, and output the comparison result to the system main processor; the system main processor is used to determine the detection result of the connection module according to the comparison result and the initial voltage, and generate a reference voltage.

[0006] In addition, an optional technical solution is that the connector module includes a functional module and a connector connected to the functional module; the two test ends include an end of the connector not connected to the functional module and an end of the functional module not connected to the connector.

[0007] In addition, an optional technical solution is that the end of the functional module not connected to the connector is connected to the negative input end of the signal amplification module; the end of the connector not connected to the functional module is connected to the positive input end of the signal amplification module.

[0008] In addition, an optional technical solution is to set a digital-to-analog converter between the main processor and the comparison module; wherein the system main processor determines the conversion voltage of the input digital-to-analog converter based on the initial voltage and the preset bias voltage; and the digital-to-analog converter outputs a reference voltage based on the conversion voltage.

[0009] In addition, an optional technical solution is that the reference voltage is input to the negative input terminal of the comparison module, and the amplified signal output by the signal amplification module is input to the positive input terminal of the comparison module.

[0010] In addition, an optional technical solution is that the signal acquisition module is an analog-to-digital converter.

[0011] In addition, an optional technical solution is to further include a detection result indication module; wherein the system main processor controls the detection result indication module to provide sound and / or light indication according to the detection result.

[0012] On the other hand, the present invention also provides a connector module detection method, which uses the above-mentioned connector module detection device to perform contact detection on the connector module to be detected, and the method includes: obtaining the initial voltage of the connector module in the initial state through a signal sampling module; determining a reference voltage based on the initial voltage, and inputting it into a comparison module; at the same time, real-time acquisition and amplification of the pressure difference between the two test ends of the connector module, determining an amplified signal corresponding to the pressure difference, and inputting it into the comparison module; determining the detection result of the connector module based on the change amplitude of the amplified signal and the reference voltage.

[0013] In addition, an optional technical solution is that before determining the reference voltage based on the initial voltage, it also includes: sending the initial voltage to the system main processor, and the system main processor determines whether the connector module is a qualified product in the initial static state based on the initial voltage and a preset value pre-stored in the system main processor; when the connector module is a qualified product in the initial static state, determining the reference voltage based on the initial voltage.

[0014] In addition, an optional technical solution is to further include: changing the indication result of the detection result indication module according to the detection result of the connector module.

[0015] By using the above-mentioned connector module detection device and detection method, a constant current source is provided to the connector module to be detected, and then the pressure difference of the measurement signal line at both ends of the connector and the product is collected, and amplified and compared. Compared with the direct use of the constant pressure measurement method, it is more stable and accurate. In addition, the signal amplification module is used for real-time sampling and comparison, which can improve the response speed and realize the detection of small changes, with higher accuracy and a wider range of applicable detection.

[0016] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0018] Figure 1 The principle of the connector module detection device according to the embodiment of the present invention is as follows Figure 1 ;

[0019] Figure 2 The principle of the connector module detection device according to the embodiment of the present invention is as follows Figure 2 ;

[0020] Figure 3 Flow chart of a connector module detection method according to an embodiment of the present invention.

[0021] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0023] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0024] In the description of the present invention, it is to be understood that the orientations or positional relationships indicated by the following terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc. are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the content or structure of the present invention.

[0025] In order to solve the defects that the existing detection methods cannot detect the poor contact of the connection method, or the abnormal contact between the male and female heads due to the interference of factors such as shaking during use, resulting in imperfect signal transmission, etc. The present invention provides a connector module detection device and detection method, which provides a stable constant current to the two test ends of the connector module to be detected, and amplifies the voltage difference between the two test ends through the signal amplification module, which can amplify the tiny signal changes and compare them with the reference voltage by the comparison module. When it exceeds the reference voltage, it can be judged that the product is defective. Compared with the traditional multimeter and ADC sampling, it is faster and can better capture the changes of poor connection, so as to identify defective products.

[0026] In order to describe the contents of the connector module detection device and detection method of the present invention in detail, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Figure 1 The schematic principle of the connector module detection device according to an embodiment of the present invention is shown.

[0028] like Figure 1As shown, the connector module detection device of the embodiment of the present invention includes: a constant current source, a signal amplification module, a signal sampling module, a comparison module and a system main processor; wherein the constant current source is used to provide a stable current to the two test ends of the connector module to be detected, that is, to provide a stable current signal to the entire test network; the signal amplification module is used to obtain the voltage difference between the two test ends and amplify it, and the output end of the signal amplification module is respectively connected to the comparison module and the signal sampling module; the signal sampling module is used to collect the initial voltage of the connector module in the initial state, and the initial state is the static state or normal state of the connector module. The initial voltage is obtained in order to better compare and judge the parameters of the connector module under impact or shaking; the comparison module is used to compare the amplified signal output by the signal amplification module with the reference voltage, and output the comparison result to the system main processor; the system main processor is used to determine the detection result of the connection module according to the comparison result and the initial voltage, and generate a reference voltage, thereby realizing accurate detection of product abnormalities caused by poor contact.

[0029] Among them, the above-mentioned connector module of the present invention mainly refers to a product or functional module including a connector and one end of the connector connected to the connector. The purpose of the detection is to determine whether the connection between the connector and the functional module or product is normal. For example, the connector module may include a functional module and a connector connected to the functional module. At this time, the two test ends refer to one end of the connector that is not connected to the functional module and one end of the functional module that is not connected to the connector.

[0030] Specifically, the signal amplification module can use an operational amplifier, and the end of the functional module that is not connected to the connector (i.e., the B end) is connected to the negative input end of the signal amplification module; the end of the connector that is not connected to the functional module (i.e., the A end) is connected to the positive input end of the signal amplification module, and the differential pressure between one end of the connector and the other end of the product can be amplified by the operational amplifier for subsequent comparison and analysis with the reference voltage.

[0031] In some embodiments of the present invention, a digital to analog converter, i.e., DAC, is also provided between the main processor and the comparison module; wherein the system main processor can determine the conversion voltage of the input digital to analog converter according to the initial voltage and the preset bias voltage, and the digital to analog converter outputs a reference voltage according to the conversion voltage. wherein, after the initial voltage is sent to the system main processor, the system main processor will add a bias voltage to the initial voltage and give it to the DAC, and the DAC will perform digital to analog conversion on the initial voltage with the bias voltage added, and output a reference voltage REF value to the comparison module.

[0032] It should be noted that the above-mentioned bias voltage can be considered to be set, and it can adopt the maximum change value allowed by the connector module to be detected during the shaking process, and can be set specifically according to the type or application scenario of the connector module.

[0033] In addition, the above-mentioned comparison module can adopt a comparator with positive and negative input terminals, wherein a reference voltage is input into the negative input terminal of the comparison module, and an amplified signal output by the signal amplification module is input into the positive input terminal of the comparison module. The amplified signal output by the signal amplification module can be compared with the reference voltage through the comparator, and whether the connector module meets the requirements can be determined based on the comparison result.

[0034] In a specific implementation of the connector module detection device of the present invention, the signal acquisition module may use an analog-to-digital converter, namely, ADC, Analog-to-Digital Converter.

[0035] In order to facilitate the inspection personnel to determine the inspection results of the connector module in a timely manner, a inspection result indication module connected to the system main processor may be further provided in the connector module inspection device of the embodiment of the present invention; wherein the system main processor controls the inspection result indication module to provide sound and / or light indication according to the inspection results, for example, different inspection results may be directly indicated by changes in the color of the light, or in conjunction with signals such as sound.

[0036] As a specific example, Figure 2 Another schematic diagram of a connector module detection device according to an embodiment of the present invention is shown.

[0037] like Figure 2 As shown, the connector module detection device of the embodiment of the present invention includes: a constant current source, a connector and a product (or a functional module) connected together, an operational amplifier (abbreviated as op amp), an ADC, a comparator, a DAC, a system main processor using an MCU (Microcontroller Unit), and an LED as a detection result indication module. The specific detection principle is similar to Figure 1 The examples are the same and will not be repeated here.

[0038] It can be seen that the connector module detection device of the present invention is powered by a constant current source, which is more stable than a constant voltage source, has higher test accuracy, and is less affected by voltage fluctuations; in addition, because the signal line has a certain impedance, taking points AB as an example, there will be a certain voltage difference between the two. By amplifying the voltage difference through an operational amplifier, the initial parameters of the product when it is not shaken can be determined.

[0039] Specifically, Figure 3 A flow chart of a connector module detection method according to an embodiment of the present invention is shown.

[0040] like Figure 3 As shown, the connector module detection method of the embodiment of the present invention uses the above connector module detection device to perform contact detection on the connector module to be detected, and the method includes:

[0041] S100: obtaining an initial voltage of the connector module in an initial state through a signal sampling module;

[0042] S200: Determine a reference voltage according to the initial voltage and input it into a comparison module;

[0043] S300: collecting and amplifying the pressure difference between the two test ends of the connector module in real time, determining an amplified signal corresponding to the pressure difference, and inputting the amplified signal into a comparison module;

[0044] S400: Determine a final detection result of the connector module according to the change amplitude of the amplified signal and the reference voltage.

[0045] In addition, before determining the reference voltage based on the initial voltage, it also includes: sending the initial voltage to the system main processor, and the system main processor determines whether the connector module is a qualified product in the initial static state based on the initial voltage and a preset value pre-stored in the system main processor; when the connector module is a qualified product in the initial static state, further determining the reference voltage based on the initial voltage.

[0046] Specifically, the logic of the detection method of the present invention includes: first, using ADC to collect the amplified voltage difference of the initial impedance on the product test circuit, and converting the voltage into a digital signal and transmitting it to the MCU for initial judgment, to determine whether the product is a qualified product in the initial static state, wherein a preset value can be manually set in the MCU as a comparison value for testing different products and different signal lines.

[0047] Secondly, when the test result is a qualified product in the initial state of the product, the initial amplified voltage difference plus a bias voltage is given to the DAC through the MCU. The DAC outputs a reference voltage REF to the negative pin of the comparator as a comparison voltage. The bias voltage can also be set by itself as the maximum change value allowed during the shaking of the product.

[0048] Secondly, the product is shaken to simulate the state of human use, and the voltage difference between the two ends of AB is collected in real time for amplification and comparison, so as to confirm whether the impedance change of the connector module exceeds the maximum value during the shaking of the product. If it exceeds the maximum value, it indicates that the product is unqualified. At this time, a high-level signal can be output to the MCU through the comparator;

[0049] Finally, after receiving the high-level signal output by the comparator, the MCU changes the display color of the LED to remind the tester that the product is unqualified.

[0050] It should be noted that the embodiments of the connector module detection method can refer to the description in the embodiment of the connector module detection device, which will not be described in detail here.

[0051] According to the above-mentioned connector module detection device and detection method, the pressure difference of the product measurement signal line at both ends of the connector and the product is collected and amplified and compared, which is more stable and accurate than directly using it to provide constant pressure measurement; at the same time, the use of an operational amplifier for real-time sampling and comparison will have a faster response time and speed than ADC data acquisition, and because the test pressure difference is amplified and then compared, small changes can be detected with higher accuracy, thereby achieving a faster measurement time, higher accuracy and more stable effect for dynamic impedance changes.

[0052] The connector module detection device and detection method according to the present invention are described as examples with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the connector module detection device and detection method proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A connector module detection device, characterized in that: It includes a constant current source, a signal amplification module, a signal sampling module, a comparison module and a system main processor; wherein, The constant current source is used to provide a stable current to the two test terminals of the connector module to be tested; The signal amplification module is used to amplify the voltage difference between the two test ends, and the output end of the signal amplification module is connected to the comparison module and the signal sampling module respectively; The signal sampling module is used to collect the initial voltage of the connector module in the initial state; The comparison module is used to compare the amplified signal output by the signal amplification module with a reference voltage, and output the comparison result to the system main processor; The system main processor is used to determine the detection result of the connection module according to the comparison result and the initial voltage, and to generate the reference voltage.

2. The connector module detection device according to claim 1, characterized in that: The connector module includes a functional module and a connector connected to the functional module; The two test ends include an end of the connector that is not connected to the functional module and an end of the functional module that is not connected to the connector.

3. The connector module detection device according to claim 2, characterized in that: The end of the functional module that is not connected to the connector is connected to the negative input end of the signal amplification module; One end of the connector that is not connected to the functional module is connected to the positive input end of the signal amplification module.

4. The connector module detection device according to claim 1, characterized in that: A digital-to-analog converter is provided between the main processor and the comparison module; wherein, The system main processor determines a conversion voltage input to the digital-to-analog converter according to the initial voltage and a preset bias voltage; The digital-to-analog converter outputs the reference voltage according to the converted voltage.

5. The connector module detection device according to claim 1, characterized in that: The reference voltage is input to the negative input terminal of the comparison module, and the amplified signal output by the signal amplification module is input to the positive input terminal of the comparison module.

6. The connector module detection device according to claim 1, characterized in that: The signal acquisition module is an analog-to-digital converter.

7. The connector module detection device according to claim 1, characterized in that: It also includes a test result indication module; wherein, The system main processor controls the detection result indication module to perform sound and / or light indication according to the detection result.

8. A connector module detection method, characterized in that: Using the connector module detection device according to any one of claims 1 to 7 to perform contact detection on a connector module to be detected, the method comprising: Acquiring an initial voltage of the connector module in an initial state through a signal sampling module; The reference voltage is determined according to the initial voltage and input into the comparison module; at the same time, Collecting the pressure difference between the two test ends of the connector module in real time and amplifying it, determining an amplified signal corresponding to the pressure difference, and inputting it into the comparison module; The detection result of the connector module is determined according to the change amplitude of the amplified signal and the reference voltage.

9. The connector module detection method according to claim 8, characterized in that: Before determining the reference voltage according to the initial voltage, the method further includes: Sending the initial voltage to a system main processor, wherein the system main processor determines whether the connector module is a qualified product in an initial static state according to the initial voltage and a preset value pre-stored in the system main processor; When the connector module is a qualified product in an initial static state, the reference voltage is determined according to the initial voltage.

10. The connector module detection method according to claim 9, characterized in that: Also includes: According to the detection result of the connector module, the indication result of the detection result indication module is changed.

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