Wearable test system for monitoring electrostatic voltage in real time and non-contact test probe

Abstract

A wearable test system for monitoring an electrostatic voltage in real time, comprising: a test probe (40), which is disposed inside an outer frame structure and is used for testing an electrostatic voltage at a lower shielding metal plate (30) and converting the electrostatic voltage from a direct current to an alternating current or other electric signal; and a test system (50), which is allowed to obtain the alternating current or other electric signal released by the test probe (40), calibrate the voltage value of the alternating current or other electric signal, and display the same. By being in direct contact with an object / human body under test, the lower shielding metal plate (30) also carries the same electrostatic voltage. The test probe (40) converts the electrostatic voltage into the alternating current or other electric signal, and a central processing unit controls a data acquisition circuit to convert an analog signal of a signal processing circuit into a digital signal, processes and analyzes the digital signal, and then uploads same or gives an alarm, so as to form a whole set of test system, testing in real time the electrostatic voltage of the object / human body under test.

Description

A wearable, real-time electrostatic voltage monitoring test system and a non-contact test probe Technical Field

[0001] This invention relates to the field of electrostatic voltage detection technology, specifically to a wearable, real-time electrostatic voltage monitoring test system and a non-contact test probe. Background Technology

[0002] With the continuous development of electronic technology and the increasing integration, the electrostatic discharge (ESD) sensitivity voltage of electronic devices is decreasing. For example, the damage voltage of some MOSFET devices reaches 100V, while the withstand voltage of sensitive components such as CMOS and VMOS is even lower than 50V. Therefore, international standards such as IEC6134-5-1, ANSI / ESD S20.20, and national standard GB / T32304 all require that the human body voltage value in the EPA (Electrostatic Discharge Matrices) be less than 100V. The testing method involves the person being tested holding one end of the electrode and connecting the other end to an ESD voltmeter, and sampling tests are conducted within a certain area. Due to factors such as the electrodes having wires, the large size of the ESD voltmeter and its power cord, random sampling can only be performed periodically. In addition, the differences between the tester and the operator, the differences between the anti-static shoes used for testing and those actually worn by the operator, and the aging of the flooring during use all contribute to the limitations of the above testing method.

[0003] A search revealed the following patents in the Chinese patent database: Publication No. CN220438442U, titled "A Non-Contact Electrostatic Voltage Testing Device," which describes a non-contact electrostatic voltage testing device with a direct induction sensor and a distance of 20-50 mm between the sensor and the charged body being tested, and an output amplitude of 0.5-1.0 V; Publication No. CN104181375A, titled "An Inductive Human Body Electrostatic Voltage Measurement Method," comprising the following steps: 1) capturing induced current through a non-contact detection device; 2) converting the obtained induced current into induced voltage through a built-in sampling unit; 3) filtering the converted induced voltage through an internal filtering circuit and then amplifying it to obtain a filtered voltage; 4) rectifying the filtered voltage through a phase-sensitive rectifier to obtain an electric field strength value; 5) multiplying the electric field strength value by the measurement distance to obtain the measured human body electrostatic voltage. Compared with the prior art, this invention has advantages such as high accuracy, high resolution, and strong anti-interference ability. It is mainly used around high-voltage overhead transmission lines, with an effective distance of up to 5cm; Publication No.: CN218767079U, Name: Portable Multipurpose Electrostatic Voltmeter, mainly solves the problems of existing electrostatic voltmeters, which are all expensive laboratory instruments, large in size, poor shock resistance, and must be used in a horizontal position, making them inconvenient to carry. They also lack leveling function, which can easily lead to large measurement errors when used on uneven surfaces. Furthermore, the opening and closing of the cover is inconvenient, making them very difficult to use; Publication No.: CN102692544A, Name: An Electrostatic Voltage Measuring Device and Method, is used to solve the problems of existing non-contact vibration capacitance measurement, which requires calibration of the positive electrode area, area amplitude, distance between the electrode and the measured electrostatic body, and distance amplitude, and requires generating a comparison voltage with the same amplitude as the measured electrostatic body voltage. At the same time, the shape, installation position, and installation angle of the electrode affect the measurement results.

[0004] Moreover, all of the above products are handheld or instrument-type, and cannot be carried around for normal measurement.

[0005] Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a wearable testing system for real-time monitoring of electrostatic voltage, thus solving the aforementioned problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A wearable, real-time electrostatic voltage monitoring test system, including

[0009] The outer frame structure that comes into contact with the object / human body under test can directly contact the object / human body under test to obtain the electrostatic voltage of the object / human body under test, so that it is at the same potential voltage as the object / human body under test when in direct contact with it.

[0010] The test probe, which is located inside the outer frame structure, is used to test the electrostatic voltage of the lower shielding metal sheet and convert the electrostatic voltage from direct current to alternating current or an electrical signal.

[0011] The testing system is allowed to receive the alternating current or electrical signal released by the test probe, convert the alternating current or electrical signal into an analog signal, obtain and calibrate the voltage value of the alternating current or electrical signal by analyzing the analog signal, and upload the voltage value to a host computer or display screen.

[0012] Preferably, the testing system includes:

[0013] An information processing circuit, which is electrically connected to the test probe, is used to process the AC voltage or electrical signal detected in the test probe into an analog signal that can be acquired by the data acquisition circuit.

[0014] A data acquisition circuit, electrically connected to the signal processing circuit, is used to convert analog signals in the information processing circuit into digital data signals;

[0015] The central processing unit, which is electrically connected to the data acquisition circuit, is used to obtain and calibrate the value of the AC voltage or electrical signal, and after processing and analyzing the digital signal, it can be uploaded to the host computer through the data communication module or displayed directly on the display screen. If the human body static voltage is abnormal, an alarm can be triggered.

[0016] The data communication module is electrically connected to the central processing unit and is used to upload the digital signal of electrostatic voltage to the host computer or display it directly on the display screen. When the data is abnormal, it can transmit a data abnormality command.

[0017] The probe control circuit is electrically connected to the central processing unit and the test probe. It is used to drive and control the rotation or vibration of the test probe, and can also obtain the operating parameters of the test probe for data correction.

[0018] The power supply circuit is electrically connected to the information processing circuit, data acquisition circuit, central processing unit, data communication circuit, and probe control circuit to provide suitable electrical energy.

[0019] Preferably, the outer frame structure includes:

[0020] The lower shielding metal sheet is in direct contact with the object / human body being tested.

[0021] An upper shielding metal sheet is disposed on the upper side of the lower shielding metal sheet;

[0022] An insulating support is disposed between the upper and lower shielding metal sheets, forming a sealed structure with an internal cavity with the lower and upper shielding metal sheets, and the test probe is disposed inside the cavity.

[0023] Preferably, the test probe can be a contact type or a non-contact type.

[0024] Preferably, the power supply circuit further includes a charging cable, which is a 2P magnetic connector or a 4P magnetic connector.

[0025] Preferably, the data communication module is a wired or wireless communication module.

[0026] Preferably, the wearable, real-time electrostatic voltage monitoring test system described above further includes:

[0027] A brushless motor is fixedly installed inside the chamber, and the brushless motor is electrically connected to the probe control circuit and the power supply circuit;

[0028] A drive shaft is fixedly mounted on the output shaft of the brushless motor;

[0029] The moving plate, which is made of metal sheet, is located at the end of the drive shaft away from the brushless motor. The moving plate has an opening that allows the voltage inside the lower shielding metal plate to pass through.

[0030] The sensing electrode is disposed outside the drive shaft and fixedly disposed inside the cavity. The sensing electrode is made of multiple sets of annularly arranged sensing plates, the sensing plates corresponding to the openings, and the induction motor is electrically connected to the information processing circuit.

[0031] Preferably, a blade is fixedly connected to the drive shaft, a photoelectric sensor is disposed on the outside of the blade, the photoelectric sensor is electrically connected to the information processing circuit, the central processing unit is electrically connected to the probe control circuit, and the probe control circuit is electrically connected to the brushless motor.

[0032] This invention provides a wearable testing system for real-time monitoring of electrostatic voltage, which has the following advantages:

[0033] 1. In this invention, the outer frame structure is in direct contact with the object / human body being tested. If the object / human body being tested is charged, the lower shielding metal sheet will also carry the same voltage. The test probe converts the voltage into alternating current or other electrical signals. The signal processing circuit amplifies, filters, rectifies, and amplifies the current to create an analog signal that can be acquired by the data acquisition circuit. The central processing unit controls the data acquisition circuit to convert the analog signal from the signal processing circuit into a digital signal. After processing and analyzing the digital signal, it can be uploaded to the host computer through the data communication module or displayed directly on the screen. If the electrostatic voltage of the human body is abnormal, an alarm can be triggered, thus forming a complete testing system to realize real-time detection of the electrostatic voltage of the object / human body being tested.

[0034] 2. In this invention, the system can be worn on the human body to monitor the electrostatic voltage on the human body in real time.

[0035] 3. In this invention, the testing system can greatly reduce the size and weight of the electrostatic voltmeter compared with the prior art, making it easier for users to carry.

[0036] 4. In this invention, the device can be charged while the user is sitting and operating it; when the user is not wearing it, it can be placed in a dedicated charging case for charging.

[0037] 5. In this invention, the charging cable has a 2P magnetic connector (used for wireless communication) or a 4P magnetic connector (used for wired communication), combining the communication cable and the power cable together, enabling real-time charging and real-time communication. Attached Figure Description

[0038] Figure 1 is a schematic diagram of the overall process of a wearable test system for real-time monitoring of electrostatic voltage according to the present invention.

[0039] Figure 2 is a flowchart of the testing system in this invention;

[0040] Figure 3 is a schematic diagram of the testing probe mechanism in this invention;

[0041] Figure 4 is a schematic diagram of the structure of the sensing electrode in this invention;

[0042] Figure 5 is a schematic diagram of the structure of the moving piece in this invention.

[0043] In the diagram: 10-Upper shielding metal sheet, 20-Insulating bracket, 30-Lower shielding metal sheet, 40-Test probe, 41-Moving piece, 42-Induction electrode, 43-Blade, 44-Photoelectric sensor, 45-Drive shaft, 46-Motor, 50-Test system, 60-Feedback circuit. Detailed Implementation

[0044] This application provides a wearable, real-time electrostatic voltage monitoring system for real-time monitoring of the electrostatic voltage carried by the tested object / human body, preventing the electrostatic voltage carried by the human body from exceeding the safe value and causing danger. In the prior art, the electrostatic voltage testing method involves the person being tested holding one end of an electrode and connecting the other end to an electrostatic voltmeter, and performing sampling monitoring within a certain area. Because the electrodes in the testing process have wires, and the electrostatic voltmeter is relatively large and has a power cord, sampling can only be performed irregularly. Furthermore, the differences between the testing personnel and the operator, the differences between the antistatic shoes used for testing and those actually worn by the operator, and the aging of the flooring during use all contribute to the limitations of the above testing methods. Therefore, achieving real-time and accurate monitoring of the human body's electrostatic voltage is crucial.

[0045] Specifically, the wearable, real-time electrostatic voltage monitoring test system provided in this invention includes:

[0046] The outer frame structure that comes into contact with the object / human body under test can directly contact the object / human body under test to obtain the electrostatic voltage of the object / human body under test, so that it is at the same voltage as the object / human body under test when in direct contact with the object / human body under test.

[0047] The test probe 40 is disposed inside the outer frame structure and is used to test the electrostatic voltage of the lower shielding metal sheet 30 and convert the electrostatic voltage from direct current to alternating current or an electrical signal.

[0048] The testing system 50 is allowed to receive the alternating current or electrical signal released by the test probe 40, convert the alternating current or electrical signal into an analog signal, obtain and calibrate the voltage value of the alternating current or electrical signal by analyzing the analog signal, and upload it to the host computer or display screen, and store or display the voltage value through the host computer and display screen.

[0049] Specifically, as shown in Figure 2: the test system 50 includes:

[0050] An information processing circuit, which is electrically connected to the test probe 40, is used to process the voltage or electrical signal detected in the test probe 40 into an analog signal that can be acquired by the data acquisition circuit.

[0051] The data acquisition circuit, which is electrically connected to the signal processing circuit, is used to convert analog signals in the information processing circuit into digital signals;

[0052] The central processing unit, which is electrically connected to the data acquisition circuit, is used to obtain and calibrate the value of the AC voltage or electrical signal, and after processing and analyzing the digital signal, it can be uploaded to the host computer through the data communication module or displayed directly on the display screen. If the human body static voltage is abnormal, an alarm can be triggered.

[0053] The data communication module is electrically connected to the central processing unit and is used to upload the digital signal of electrostatic voltage to the host computer or display it directly on the display screen. When the data is abnormal, it can transmit a data abnormality command.

[0054] The probe control circuit is electrically connected to the central processing unit and the test probe 40. It is used to drive and control the rotation or vibration of the test probe 40, and can obtain the operating parameters of the test probe 40 for data correction.

[0055] The power supply circuit, electrically connected to the information processing circuit, data acquisition circuit, central processing unit, data communication circuit, and probe control circuit, provides suitable electrical energy. When the user wears the device, the battery in the power supply circuit provides power to the system while the user is walking. When the user sits down, a charger can be directly connected, which not only charges the battery but also allows the power ground to be used as a reference point for electrostatic voltage testing. Preferably, the power supply circuit also includes a charging cable, which has a 2-pin magnetic connector (for wireless communication) or a 4-pin magnetic connector (for wired communication). The communication cable and power cable can be integrated for real-time charging and communication.

[0056] After the object / human body being tested is fitted, the battery in the power circuit provides power when the object / human body moves. When the object / human body is fixed, it can be directly connected to a charger, which not only charges the battery but also allows the power ground to be used as a reference point for probe testing, facilitating charging. Preferably, the data communication module uses common wired or wireless methods such as WIFI, Bluetooth, ZIGBEE, USB, TCP / IP, RS485, RS232, and RS422. When using wired communication, data is temporarily stored in the circuit when the person walks or stands, and then packaged and uploaded when wired communication is established. When using wireless communication, real-time data upload can be achieved.

[0057] Specifically, as shown in Figure 1, the outer frame structure includes:

[0058] The lower shielding metal sheet 30 is in direct contact with the object / human body being tested.

[0059] The upper shielding metal sheet 10 is disposed on the upper side of the lower shielding metal sheet 30;

[0060] An insulating support 20 is disposed between the upper shielding metal sheet 10 and the lower shielding metal sheet 30, and together with the lower shielding metal sheet 30 and the upper shielding metal sheet 10, forms a sealed structure with an internal cavity. The test probe 40 is disposed inside the cavity.

[0061] Thus, when the lower shielding metal sheet 30 comes into contact with the object / human body being tested, the lower shielding metal sheet 30 carries the same voltage as the object / human body being tested. The electrostatic voltage of the lower shielding metal sheet 30 is converted from direct current to alternating current or other electrical signals by the test probe 40 to achieve monitoring.

[0062] Working principle: The lower shielding metal sheet 30 is in direct contact with human skin. If the object / human being being tested is charged, the lower shielding metal sheet 30 will also carry the same voltage. The test probe 40 converts the voltage into alternating current. The signal processing circuit amplifies, filters, rectifies, and amplifies the current again to produce an analog signal that can be acquired by the data acquisition circuit. The central processing unit controls the data acquisition circuit to convert the analog signal from the signal processing circuit into a digital signal. After processing and analyzing the digital signal, it can be uploaded to the host computer through the data communication module or displayed directly on the screen. If the human body's electrostatic voltage is abnormal, an alarm can be triggered.

[0063] For example, in the electronics industry, the electrostatic voltage of the human body must not exceed HBM 100V. When the central processing unit detects that the electrostatic voltage of the human body exceeds HBM 100V, it will alert personnel through the alarm unit to pay attention to the voltage exceeding the limit. In the flammable and explosive industries, the electrostatic voltage of the human body must not exceed HBM 2000V. When the central processing unit detects that the electrostatic voltage of the human body exceeds HBM 2000V, it will alert personnel through the alarm unit to pay attention to the voltage exceeding the limit. At the same time, the central processing unit obtains the probe's operating parameters through the probe control circuit, thereby judging the probe's operating performance, and adjusts the probe's operating speed through the probe control circuit to achieve a constant operating frequency for the probe.

[0064] Furthermore, the alarm unit is one or more combinations of a host computer, a display screen, or an audible and visual alarm. Thus, the alarm can be displayed on the host computer or display screen, and abnormal data (or data exceeding the standard) can also be alerted to personnel through the host computer, display screen, or audible and visual alarm.

[0065] Specifically, as shown in Figure 3:

[0066] Furthermore, the test probe 40 can be a contact or non-contact probe, such as a direct sensing type, sensing capacitance type, vibration capacitance type, rotating blade type, or feedback electric field type.

[0067] Additionally, please refer to Figures 3-5, this application also discloses a non-contact test probe 40.

[0068] The non-contact test probe 40 includes:

[0069] A brushless motor 46 is fixedly installed inside the chamber, and the brushless motor 46 is electrically connected to the probe control circuit and the power supply circuit;

[0070] The drive shaft 46 is fixedly mounted on the output shaft of the brushless motor 46. When the brushless motor 46 starts, the drive shaft 46 rotates accordingly.

[0071] The moving plate 41 is made of metal sheet and is located at the end of the drive shaft 46 away from the brushless motor 46. The moving plate 41 is provided with an opening 411 through which the internal voltage of the lower shielding metal plate 30 can pass.

[0072] The sensing electrode 42 is located outside the drive shaft 46 and fixed inside the cavity. The sensing electrode 42 is made of multiple sets of annularly arranged sensing plates, which correspond to the opening 411. When the moving plate 41 rotates under the drive of the brushless motor 46, the moving plate 41 will periodically block the sensing plate (A or B) on the sensing electrode 42. The sensing plate will periodically sense the electrostatic voltage on the lower metal plate 30 to form an AC signal. The AC signal is transmitted to the control system 50 to realize the monitoring of AC signal, thereby realizing the monitoring of electrostatic voltage and ensuring its accuracy.

[0073] Specifically, as shown in Figure 3: a blade 43 is fixedly connected to the drive shaft 45, and a photoelectric sensor 44 is provided on the outside of the blade 43. The photoelectric sensor 44 is electrically connected to the information processing circuit, the central processing unit is electrically connected to the probe control circuit, and the probe control circuit is electrically connected to the brushless motor 46. Thus, when the blade 43 rotates under the action of the brushless motor 46, the photoelectric sensor 43 detects the rotation speed of the blade 43 and transmits an electrical signal to the probe control circuit. The probe control circuit controls the speed of the brushless motor 46 according to the electrical signal, thereby achieving the speed stability of the brushless motor 46.

[0074] Thus, if the object / human body being tested carries a certain voltage, the lower shielding metal plate 30, in direct contact with the object, will also carry the same voltage. Driven by the brushless motor 46, the moving plate 41 rotates at the same angular velocity, periodically blocking the sensing electrode 42. The voltage induced on the sensing electrode 42 changes periodically, generating an induced current. The magnitude of this induced current is proportional to the voltage of the object being tested. Measuring this current yields the voltage on the object. Because the motor's rotational speed has a certain error, the rotational speed of the brushless motor 46 can be obtained through the photoelectric sensor 44, allowing for data correction to maintain a consistent rotational speed.

[0075] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wearable, real-time electrostatic voltage monitoring test system, characterized in that: include The outer frame structure that comes into contact with the object / human body under test can directly contact the object / human body under test to obtain the electrostatic voltage of the object / human body under test, so that it is at the same potential voltage as the object / human body under test when in direct contact with it. The test probe (40) is located inside the outer frame structure and is used to test the electrostatic voltage of the lower shielding metal sheet (30) and convert the electrostatic voltage from direct current to alternating current or an electrical signal. The test system (50) is allowed to receive the alternating current or electrical signal released by the test probe (40), convert the alternating current or electrical signal into an analog signal, obtain and calibrate the voltage value of the alternating current or electrical signal by analyzing the analog signal, and upload the voltage value to the host computer or display screen.

2. The wearable, real-time electrostatic voltage monitoring test system as described in claim 1, characterized in that: The test system (50) includes: An information processing circuit, which is electrically connected to the test probe (40), is used to process the AC voltage or electrical signal detected in the test probe (40) into an analog signal that can be acquired by the data acquisition circuit. A data acquisition circuit, which is electrically connected to the signal processing circuit, is used to convert analog signals in the information processing circuit into digital signals; The central processing unit, which is electrically connected to the data acquisition circuit, is used to obtain and calibrate the value of the AC voltage or electrical signal, and after processing and analyzing the digital signal, it can be uploaded to the host computer through the data communication module or displayed directly on the display screen. If the human body static voltage is abnormal, an alarm can be triggered. The data communication module is electrically connected to the central processing unit and is used to upload the digital signal of electrostatic voltage to the host computer for display. When the data is abnormal, it can transmit a data abnormality command. The probe control circuit is electrically connected to the central processing unit and the test probe (40) to drive and control the rotation or vibration of the test probe (40), and can also obtain the operating parameters of the test probe (40) for data correction. The power supply circuit is electrically connected to the information processing circuit, data acquisition circuit, central processing unit, data communication circuit, and probe control circuit to provide suitable electrical energy.

3. The wearable, real-time electrostatic voltage monitoring test system as described in claim 1, characterized in that: The outer frame structure includes: The lower shielding metal sheet (30) is in direct contact with the object / human body being tested; An upper shielding metal sheet (10) is disposed on the upper side of the lower shielding metal sheet (30); An insulating support (20) is disposed between the upper shielding metal sheet (10) and the lower shielding metal sheet (30). The test probe (40) is located inside the cavity and forms a sealed structure with the lower shielding metal sheet (30) and the upper shielding metal sheet (10).

4. The wearable, real-time electrostatic voltage monitoring test system as described in claim 1, characterized in that: The test probe (40) is either a contact type or a non-contact type.

5. The wearable, real-time electrostatic voltage monitoring test system as described in claim 2, characterized in that: The power circuit also includes a charging cable, which is a 2P magnetic connector or a 4P magnetic connector.

6. The wearable, real-time electrostatic voltage monitoring test system as described in claim 2, characterized in that: The data communication module can be a wired or wireless communication module.

7. A non-contact test probe, characterized in that: The wearable, real-time electrostatic voltage monitoring test system according to any one of claims 1-6 further includes: A brushless motor (46) is fixedly installed inside the chamber, and the brushless motor (46) is electrically connected to the probe control circuit and the power supply circuit; A drive shaft (46) is fixedly mounted on the output shaft of the brushless motor (46); The moving piece (41), which is made of metal sheet, is located at one end of the drive shaft (46) away from the brushless motor (46), and the moving piece (41) has an opening (411) through which the internal voltage of the lower shielding metal plate (30) can pass. The sensing electrode (42) is disposed outside the drive shaft (46) and fixedly disposed inside the cavity. The sensing electrode (42) is made of multiple sets of annularly arranged sensing plates, which correspond to the opening (411). The induction motor (42) is electrically connected to the information processing circuit.

8. The non-contact test probe as described in claim 7, characterized in that: A blade (43) is fixedly connected to the drive shaft (45). A photoelectric sensor (44) is provided on the outside of the blade (43). The photoelectric sensor (44) is electrically connected to the information processing circuit. The central processing unit is electrically connected to the probe control circuit. The probe control circuit is electrically connected to the brushless motor (46).

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