Intelligent electrostatic prevention and control entrance control method and device

Abstract

The application belongs to the technical field of entrance and exit management control related to safety production prevention, and particularly relates to an intelligent electrostatic prevention and control entrance and exit control method and device. The method comprises the following steps: detecting an electrostatic value of a to-be-identified part, obtaining a comprehensive electrostatic value of a person, collecting data, pre-processing, training an LSTM model, and predicting a comprehensive electrostatic value range by using the trained LSTM model; calculating a mean value and a fluctuation range of the predicted comprehensive electrostatic value; comparing the mean value of the predicted comprehensive electrostatic value with a threshold value thereof, and comparing the predicted fluctuation range with a threshold value thereof; adjusting the comprehensive electrostatic value threshold value according to the comparison result; and comparing the measured comprehensive electrostatic value with the adjusted comprehensive electrostatic value threshold value, and allowing passage when the measured comprehensive electrostatic value does not exceed the adjusted comprehensive electrostatic value threshold value. The application reduces the obstruction of personnel passage by dynamically adjusting the electrostatic threshold value, and realizes dynamic prevention and control of electrostatic risks.

Description

Technical Field

[0001] This invention belongs to the field of access control technology related to safety production prevention, specifically relating to intelligent electrostatic control access control methods and equipment. Background Technology

[0002] Currently, in electrostatic-sensitive environments such as electronic manufacturing workshops, the widely used management method by manufacturing enterprises is to touch electrostatic discharge devices or to add electrostatic detection devices for re-inspection. This method has the following problems:

[0003] 1. The electrostatic discharge device operates independently, and its grounding directly affects the discharge effect on personnel. The static voltage is not visible, there is no warning, and there is no integrated blocking mechanism, which cannot ensure the completion of electrostatic discharge, posing a significant safety hazard.

[0004] 2. Even if an electrostatic discharge device is added after the electrostatic discharge device has discharged the static electricity, without an integrated barrier mechanism for linkage control, or relying on the conscientiousness of the staff, or arranging manual duty and supervision personnel, omissions and errors will occur due to their sense of responsibility, work attitude and professionalism. At the same time, a large number of security inspection and duty personnel are required in the control area with a large number of people, which will result in a large personnel cost.

[0005] 3. In electrostatic-sensitive environments such as electronics manufacturing workshops, static electricity carried by personnel can seriously affect product quality and production equipment. Traditional methods of fixing static electricity thresholds are difficult to adapt to the complex and variable static electricity environment within workshops, easily leading to frequent restrictions on personnel passage during normal fluctuations in static electricity levels, thus impacting production efficiency.

[0006] Given the numerous shortcomings of the above methods, they can no longer meet the current management requirements of production enterprises for precise control of static voltage among workers. Therefore, it is necessary to design an intelligent static electricity control access control method and equipment that dynamically adjusts the static electricity threshold based on actual conditions. Summary of the Invention

[0007] To address the technical problem that "in electrostatic-sensitive environments such as electronics manufacturing workshops, static electricity carried by personnel can severely impact product quality and production equipment. Traditional methods of fixing static electricity thresholds are ill-suited to the complex and variable electrostatic environment within workshops, often leading to frequent personnel restrictions during periods of normal static electricity fluctuations, thus affecting production efficiency," this invention provides the following technical solution:

[0008] Firstly,

[0009] This invention provides an intelligent electrostatic discharge prevention and control method for entrances and exits, comprising the following steps;

[0010] Step S1: Detect the electrostatic value of the identification parts of the person entering the access control area. The identification parts include hands, feet, head, and other parts. The detected electrostatic values ​​of each identification part are E1, E2, E3, and E4, respectively. Assign weights to the electrostatic values ​​of each identification part, and calculate the person's comprehensive electrostatic value E using a weighted average algorithm. to ;

[0011] Step S2: Collect electrostatic measurement data, including comprehensive electrostatic value, environmental data, and personnel information data of personnel entering the workshop at different times according to the set frequency, and construct a dataset;

[0012] Step S3: Clean and normalize the dataset; train an electrostatic-based LSTM model using the preprocessed dataset; use the trained LSTM model to predict the range of comprehensive electrostatic values ​​over a future period.

[0013] Step S4: Calculate the mean and fluctuation range of the predicted comprehensive static electricity value for different time periods each day;

[0014] Step S5: Calculate the average of the predicted comprehensive static electricity values. Its corresponding comprehensive electrostatic value threshold E th The predicted fluctuation range σ1 of the comprehensive electrostatic value is compared with its corresponding fluctuation range threshold σ. th Compare the results; adjust the overall electrostatic value threshold E based on the comparison results. th ;

[0015] Step S6: Compare the overall electrostatic value of the detected personnel at the access control entrance with the adjusted overall electrostatic value threshold E. th The measured comprehensive static electricity value is compared, and personnel are allowed to pass if the measured comprehensive static electricity value does not exceed the adjusted comprehensive static electricity value threshold.

[0016] Furthermore, when And σ1 < σ th At that time, the overall electrostatic discharge threshold is increased, and the adjusted overall electrostatic discharge threshold is E′. th =E th ×(1+α), where α is an adjustment coefficient, 0<α<0.5.

[0017] Furthermore, when And σ1>σ th When this happens, the overall electrostatic discharge threshold is lowered, and the adjusted overall electrostatic discharge threshold is E′. th =E th ×(1-β), where β is the adjustment coefficient, and 0<β<1.

[0018] Furthermore, when And σ1 < σ th At the same time, the overall electrostatic value threshold remains unchanged.

[0019] Furthermore, when 1.1σ th <σ1≤1.2σ th , β∈(0-0.2); when 1.2σ th <σ1≤1.5σ th , β∈[0.2-0.5); when σ1>1.5σ th , β∈[0.5-1).

[0020] Furthermore, in step S1, the weights of the electrostatic values ​​for the hands, feet, head, and other parts are ω1, ω2, ω3, and ω4, respectively, with ω1>ω2>ω3>ω4, and simultaneously satisfying ω1+ω2+ω3+ω4=1. Therefore, the overall electrostatic value E is... to =ω1E1+ω2E2+ω3E3+ω4E4.

[0021] Furthermore, step S1 also includes: obtaining the ambient humidity H at the access control entrance, and adaptively adjusting the weight of the electrostatic value of each identification part according to the ambient humidity H. The adjustment coefficients for the weights of the hands, feet, head, and other parts are k1, k2, k3, and k4, respectively.

[0022] The relationship between the adjustment coefficient k1 of the hand weight ω1 and the humidity is: k1=1-0.01×(H-H0);

[0023] The relationship between the adjustment coefficient k2 of the foot weight ω2 and the humidity is: k2=1-0.008×(H-H0);

[0024] The relationship between the adjustment coefficient k3 of the head weight ω3 and the humidity is: k3=1-0.005×(H-H0);

[0025] The relationship between the adjustment coefficient k4 of the weight ω4 of other parts and the humidity is: k4=1-0.003×(H-H0); where H0 is the standard humidity value.

[0026] Furthermore, step S1 also includes: adaptively adjusting the weights of the electrostatic values ​​of each identification part according to the ambient humidity H. The adjusted weights for the hand, foot, head, and other parts are ω′1=ω1×k1, ω′2=ω2×k2, ω′3=ω3×k3, ω′4=ω4×k4, respectively. The adjusted comprehensive electrostatic value E to =ω′1E1+ω′2E2+ω′3E3+ω′4E4.

[0027] Secondly,

[0028] This invention provides an intelligent electrostatic discharge (ESD) prevention and control access control device for executing the aforementioned intelligent ESD prevention and control access control method, comprising:

[0029] Identity recognition device, humidity sensor, electrostatic discharge area, single-person access control area, and signal converter, industrial control host, and access controller built into the single-person access control area;

[0030] An identification device is installed on one side of the single-person access control area to identify the identity of the person to be inspected; the single-person access control area includes boxes on the left and right sides and a channel controller and barrier mechanism installed inside them; a humidity sensor is installed on the box of the single-person access control area;

[0031] The electrostatic discharge area includes an electrostatic monitoring device and an electrostatic discharge device. The electrostatic monitoring device is located on the cover of the box on the other side of the single-person access control area. The electrostatic monitoring device includes an electrostatic detector, an information display screen, and an LED indicator. The electrostatic detector detects the static charge carried by the person to be inspected, including the comprehensive electrostatic value of the person entering, and displays it on the information display screen. The electrostatic discharge device discharges the carried static electricity. The person can check in real time whether the comprehensive electrostatic value they carry exceeds the preset comprehensive electrostatic value threshold through the information display screen and LED indicator, and at the same time transmit the result to the industrial control host.

[0032] The industrial control host is built into the single-person access control area cabinet. It is connected to an identity recognition device, an electrostatic monitoring device, a channel controller, a signal converter, an access control controller, and a humidity sensor via a serial port. The industrial control host collects the ID information transmitted from the identity recognition device and the pass signal sent from the electrostatic detector, and then feeds it back to the access control controller.

[0033] The access control controller sends an authorization signal to the channel controller to control the barrier mechanism, allowing personnel to pass.

[0034] Furthermore, the single-person access control area also includes a channel status indicator device, which is installed on the side of the single-person access control area and is electrically connected to the channel controller to indicate the standby and prohibited access status of the channel where the single-person access control area is located.

[0035] Furthermore, the single-person access control area also includes an access control authorization status indicator device, located on a box on one side of the single-person access control area. It is electrically connected to the channel controller and is used to indicate the standby, authorized access, and prohibited access stages of the channel.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] This invention presents an intelligent electrostatic discharge (ESD) prevention and control method for access control. By dynamically adjusting the ESD threshold while effectively preventing ESD risks, the adjusted comprehensive ESD threshold is applied to access control systems. Compared to using a fixed threshold, increasing the comprehensive ESD threshold avoids frequent personnel restrictions due to normal increases in ESD levels, thus preventing disruptions to production efficiency and ensuring access control remains operational. It also reduces personnel obstruction caused by normal fluctuations in ESD levels, ensuring efficient and smooth production activities. Conversely, lowering the comprehensive ESD threshold strengthens ESD prevention and control, ensuring the safety of electronic equipment and products within the workshop and achieving dynamic control of ESD risks. Attached Figure Description

[0038] Figure 1 The flowchart is as follows: This invention provides a method for intelligent electrostatic discharge control at entrances and exits.

[0039] Figure 2 This is a schematic diagram of the block structure of the intelligent electrostatic control access control device of the present invention;

[0040] Figure 3 This is a schematic diagram of the overall structure of the intelligent electrostatic control access control device of the present invention;

[0041] Figure 4 This is an exploded view of the intelligent electrostatic control access control device of the present invention;

[0042] Figure 5 This is a schematic diagram of the intelligent electrostatic control access control device system of the present invention.

[0043] Figure label:

[0044] 1 is the identification device; 2 is the electrostatic discharge detection area; 3 is the single-person access control area; 4 is the signal converter; 5 is the industrial control host; 6 is the access information server; 7 is the management terminal; 8 is the access controller; 9 is the access control data server;

[0045] 11 is a card reader; 12 is a fingerprint scanner; 13 is a palm and palm vein scanner; 14 is an iris and face scanner.

[0046] 21 is an electrostatic monitoring device; 211 is an electrostatic detector; 212 is an information display screen; 213 is an LED indicator; 22 is an electrostatic discharge device; 221 is an electrostatic discharge ball; 222 is an electrostatic discharge floor.

[0047] 31 is a channel status indicator; 32 is an access control authorization status indicator; 33 is a channel controller; 34 is an infrared anti-tailgating system; 35 is a blocking mechanism. Detailed Implementation

[0048] The technical solution of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0049] It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "rear", "lateral", "longitudinal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0050] This invention pertains to access control and management related to safety production prevention, and integrates static voltage monitoring with intelligent access control equipment.

[0051] Example 1

[0052] like Figure 1 As shown, the present invention provides an intelligent electrostatic discharge prevention and control method for entrances and exits, comprising the following steps:

[0053] Non-contact electrostatic discharge (ESD) testers and humidity sensors are deployed at the access control entrances of intelligent ESD prevention and control systems. The non-contact ESD testers use multiple probes to detect the ESD values ​​of easily generated body parts, including hands, feet, head, and other parts (such as the torso). The ESD values ​​for hands, feet, head, and other parts are measured as E1, E2, E3, and E4 respectively, and then the overall ESD value is calculated.

[0054] E to =ω1E1+ω2E2+ω3E3+ω4E4.

[0055] Weights are assigned to the electrostatic values ​​of each identification part. The weights for the hands, feet, head, and other parts are ω1, ω2, ω3, and ω4, respectively, with ω1>ω2>ω3>ω4. At the same time, ω1+ω2+ω3+ω4=1 is satisfied. The weight ω1 can be in the range of 0.4-0.6, the weight ω2 is generally in the range of 0.2-0.3, the weight ω3 is usually in the range of 0.1-0.2, and the weight ω4 can be in the range of 0.05-0.1.

[0056] Considering environmental factors, the ambient humidity H detected by the humidity sensor is obtained. Based on the ambient humidity, the weights of the electrostatic values ​​E1, E2, E3, and E4 of each identification part in the comprehensive electrostatic value are adaptively adjusted. The adjustment coefficients for the electrostatic values ​​of the hands, feet, head, and other parts are k1, k2, k3, and k4, respectively.

[0057] When the identified body part is the hand, the relationship between the adjustment coefficient k1 of the hand static electricity value weight ω1 and the humidity is as follows:

[0058] k1 = 1 - 0.01 × (H - H0); where H0 is the standard humidity value, which is usually between 40% and 60% relative humidity.

[0059] The adjusted hand static electricity value weight ω′1=ω1×k1 is calculated in real time based on the adjustment coefficient k1.

[0060] When the identified body part is the foot, the relationship between the adjustment coefficient k2 of the foot weight ω2 and humidity is as follows:

[0061] k2 = 1 - 0.008 × (H - H0).

[0062] The adjusted foot static electricity value weight ω′2=ω2×k2 is calculated in real time based on the adjustment coefficient k2;

[0063] When the identified body part is the head, the relationship between the adjustment coefficient k3 of the head weight ω3 and the humidity is as follows:

[0064] k3 = 1 - 0.005 × (H - H0);

[0065] The adjusted head electrostatic value weight ω′3=ω3×k3 is calculated in real time based on the adjustment coefficient k3;

[0066] When the identified part is another part, the relationship between the adjustment coefficient k4 of the weight ω4 of other parts and the humidity is: k4=1-0.003×(H-H0). The adjusted static electricity weight ω′4=ω4×k4 is calculated in real time based on the adjustment coefficient k4.

[0067] After considering the influence of humidity on the weights of each identification part, the calculated weights of each part after considering the influence of temperature and humidity are substituted into the formula to adjust the overall electrostatic value E. to =ω′1E1+ω′2E2+ω′3E3+ω′4E4, this value more accurately reflects the overall static electricity status of the human body under the current humidity environment.

[0068] Collect electrostatic measurement data (including overall electrostatic value and electrostatic value of each identification part), environmental data (including ambient humidity H) and personnel information data of employees entering the workshop at different times of the day according to the set frequency, obtain multiple data points, and construct a dataset; each data in the dataset includes "employee number, name, department, passage time, passage direction, passage result, hand electrostatic value, foot electrostatic value, head electrostatic value, other part electrostatic value, overall electrostatic value, ambient humidity";

[0069] The constructed dataset undergoes cleaning and normalization preprocessing. Data cleaning includes: checking for missing values ​​in the dataset. For records with missing values, if critical information (such as employee number, access time, etc.) is missing, the record is deleted directly. For non-critical information (such as missing electrostatic values ​​of a certain identification area), the mean imputation method can be used, that is, the average electrostatic value of that area in the entire dataset is calculated and used to fill the missing values. At the same time, the dataset is checked for outliers, such as data points with electrostatic values ​​exceeding the reasonable range. If outliers are found, they are corrected or deleted based on the trend of the preceding and following data.

[0070] The numerical data (such as electrostatic values ​​of each identification site, overall electrostatic value, and ambient temperature) in the cleaned dataset are normalized by scaling the data to the [0, 1] interval and using the Z-score normalization method to convert the data into a standard normal distribution with a mean of 0 and a standard deviation of 1. Taking the hand electrostatic value E1 as an example, the normalization formula is as follows: Where μ is the mean of the static electricity values ​​of the hands in the dataset, and σ is the standard deviation.

[0071] The preprocessed dataset is divided into training and test sets. The training set is input into the LSTM model for training. After training, the model is validated using the test set. The root mean square error (RMSE) and coefficient of determination (R²) are used to evaluate the performance of the LSTM model. When R² > 0.9, it indicates that the model performance meets the requirements and can be used for electrostatic value range prediction. The trained LSTM model is then used to predict the comprehensive electrostatic value range over a future period. For example, predicting the comprehensive electrostatic value range at different times within a future day.

[0072] Based on the range of comprehensive static electricity values ​​predicted by the LSTM model, the mean of the predicted comprehensive static electricity values ​​for different time periods each day is calculated. Fluctuation range σ1 (maximum value - minimum value); Set the comprehensive electrostatic value threshold to E. th Set the fluctuation range threshold σ th .

[0073] When predicted And σ1 < σ th This means that although the overall static electricity level is high during peak production periods, it is relatively stable; by adjusting the coefficient α (e.g., 0.05), the comprehensive static electricity threshold can be increased to E′. th =e th ×(1+α), where α is an adjustment coefficient, 0<α<0.5. Increasing the overall static electricity threshold can prevent frequent personnel access restrictions due to normal static electricity increases, thus avoiding impacts on production efficiency and ensuring access control remains operational.

[0074] The range of values ​​for the adjustment coefficient (α) usually needs to take into account various factors such as the specific production conditions of the workshop, the electrostatic sensitivity of the equipment and products, and historical electrostatic data.

[0075] The adjustment coefficient (α) can take values ​​ranging from low (α∈(0.03-0.05)), moderate (α∈[0.05-0.1)), to high (α∈[0.1-0.2)).

[0076] In workshops with relatively stable electrostatic environments, or where products or equipment have low electrostatic sensitivity, the fluctuation of electrostatic values ​​is inherently small. In such cases, the adjustment factor α can be relatively low, such as 0.03-0.05. For most ordinary electronic production workshops, where electrostatic protection measures are generally inadequate and products and equipment have some sensitivity to electrostatics, an adjustment factor of 0.05-0.1 is appropriate. In workshops with higher electrostatic risks, a higher adjustment factor can be used, such as 0.1-0.2.

[0077] Using a fixed threshold might frequently prevent personnel from passing through due to static electricity levels exceeding the set standard. Dynamically increasing the overall static electricity threshold allows personnel with static electricity levels within the normal range to pass through the access control system smoothly, improving production efficiency. For example, during peak production periods and after replacing new equipment, static electricity levels generally rise. Dynamically increasing the threshold can reduce the number of people blocked from passing through per hour, effectively ensuring production rhythm. During periods of heavy production demand and frequent personnel movement, appropriately increasing the overall static electricity threshold ensures efficient personnel passage.

[0078] Conversely, if a large fluctuation in the overall static electricity value is predicted and there is a risk of exceeding the standard, the threshold for the overall static electricity value should be lowered.

[0079] when And σ1>σ th At that time, by adjusting the coefficient β (e.g., 0.15), the threshold value of the comprehensive electrostatic value is reduced to E′. th =E th ×(1-β). For example, during periods when the electrostatic environment may be unstable, such as equipment maintenance or process adjustments in the workshop, the overall electrostatic discharge threshold should be lowered to strengthen electrostatic control and ensure the safety of electronic equipment and products in the workshop. The adjusted overall electrostatic discharge threshold will be used to determine the electrostatic discharge value when personnel pass through, achieving dynamic control of electrostatic risks. During relatively quiet periods or periods with high electrostatic risk, the overall electrostatic discharge threshold should be adjusted to strengthen control and maintain the smooth and orderly operation of production activities.

[0080] The adjustment coefficient β is set to a low value (0-0.2), a moderate value (0.2-0.5), and a high value (0.5-1). When the electrostatic fluctuation σ1 is only slightly larger than the fluctuation range threshold σ... th (e.g., σ1 exceeds σ) thThe amplitude is in the range of 10%-20%, 1.1σ th <σ1≤1.2σ th ), β can take a small value, β∈(0-0.2). When the electrostatic fluctuation σ1 is significantly greater than σ th (e.g., σ1 exceeds σ) th When the amplitude is in the range of 20%-50%, 1.2σ th <σ1≤1.5σ th ), β∈[0.2-0.5). If the electrostatic fluctuation σ1 is much larger than σ th (If σ1 exceeds σ) th The amplitude is greater than 50%, σ1>1.5σ th Furthermore, the electrostatic risk assessment indicates a high-risk state, in which case β needs to be taken as a higher value, β∈[0.5-1).

[0081] when And σ1 < σ th At the same time, the overall electrostatic value threshold remains unchanged.

[0082] The adjusted comprehensive static electricity threshold is applied to the access control system at the entrance and exit. The turnstiles at the access control points remain open. When a person passes through the turnstile, the system compares the person's comprehensive static electricity value with the adjusted comprehensive static electricity threshold. If the measured comprehensive static electricity value does not exceed the adjusted threshold, the person passes directly. If the measured comprehensive static electricity value exceeds the adjusted threshold, the system alerts the person to the excessive static electricity level via a display screen or LED indicator. Static electricity is then eliminated through a static electricity discharge device until the comprehensive static electricity value does not exceed the adjusted threshold, at which point the person passes.

[0083] Regularly assess whether the comprehensive electrostatic discharge (ESD) threshold effectively balances ESD control and personnel access efficiency. Evaluate the effectiveness by statistically analyzing indicators such as personnel access obstruction rate and ESD incident incidence rate. Through these steps, the comprehensive ESD threshold at the access control points of the electronics workshop can be dynamically adjusted, effectively controlling ESD risks, reducing the number of times personnel access is obstructed, ensuring personnel access efficiency, and improving production efficiency. Simultaneously, it reduces the product defect rate caused by ESD issues.

[0084] Example 2

[0085] Combination Figures 2-5 As shown, an intelligent electrostatic discharge (ESD) prevention and control access control device is used to execute the intelligent ESD prevention and control access control method described in Example 1. The intelligent ESD prevention and control access control device includes:

[0086] The system includes: 1. Identification device; 2. Humidity sensor; 3. Electrostatic discharge area; 4. Single-person access control area; 5. Signal converter built into the single-person access control area; 6. Industrial control host; 7. Access controller; 8.

[0087] The identity recognition device 1 is located on the right side of the cabinet cover of the single-person access control area 3, including but not limited to card reader 11, fingerprint recognition device 12, palm and palm vein recognition device 13, and iris and face recognition device 14, etc., for reading access cards or personal biometric information to determine the identity of the person to be inspected.

[0088] A humidity sensor (not shown in the figure) is installed on the box of the single-person access control area 3 to detect the ambient humidity H at the entrance of the access control gate.

[0089] The electrostatic discharge monitoring area 2 is equipped with an electrostatic monitoring device 21 and an electrostatic discharge device 22. The electrostatic monitoring device 21 is located on the left side of the enclosure cover of the single-person access control area 3, and includes an electrostatic detector 211, an information display screen 212, and an LED indicator 213. The electrostatic detector 211 receives the static charge on the identified parts of the human body through its multiple probes. When the human body carries a static charge, the probes sense a change in the electric field. This change is converted into an electrical signal by a charge induction coil. Then, the charge signal is amplified and digitally processed, and finally displayed on the information display screen 212, showing the electrostatic value of the identified parts, including hands, feet, head, and other parts (such as the torso), as well as the calculated comprehensive electrostatic value and its threshold. In addition, the electrostatic detector 211 can also measure the potential difference between different objects. When two objects carrying static charges approach each other, an electric field is generated between them. The electrostatic detector 211 uses an internal electric field sensor to detect the change in this potential difference, thereby determining the charge status between the objects. It can be preset with calibration values ​​to detect the electrostatic discharge of the human body.

[0090] The electrostatic discharge device 22 includes an electrostatic discharge ball 221 installed on a box in the single-person access control area 3, and an electrostatic discharge floor 222 laid at the bottom of the single-person access control area 3. When the on-duty inspection personnel enter the electrostatic discharge area 2, the electrostatic detector 211 detects that the comprehensive electrostatic value of the personnel exceeds their comprehensive electrostatic value threshold. The personnel touch the electrostatic discharge ball 221 and the electrostatic discharge floor 222, and check in real time whether their comprehensive electrostatic value exceeds their comprehensive electrostatic value threshold through the information display screen 212 and the LED indicator device 213. At the same time, the electrostatic comparison result is transmitted to the industrial control host 5 to generate a pass signal for controlling whether to pass through the gate.

[0091] The single-person access control area 3 includes a blocking mechanism 35, cabinets on the left and right sides, a channel status indicator 31, an access control authorization status indicator 32, a channel controller 33, an infrared anti-tailgating system 34, and the blocking mechanism 35. The single-person access control area 3 is a passageway for single-person passage. The blocking mechanism 35 uses an anti-tailgating control gate, including but not limited to tripod turnstiles, swing gates, wing gates, and rotary gates, ensuring that only one person can pass through after a successful verification signal.

[0092] The channel status indicator 31 is installed on the upper part of the column on the right side of the single-person access control area 3. It is electrically connected to the channel controller 33. The channel status indicator 31 uses red and green dual-color LED indicator lights to indicate the standby and prohibited access status of the channel, respectively.

[0093] The access control authorization status indicator 32 is located on the upper panel of the right side box of the single-person access control area 3. It is electrically connected to the channel controller 33 and uses a three-state LED indicator to indicate the standby, authorized access, and prohibited access stages of the channel system.

[0094] The channel controller 33 is located inside the left side box of the single-person access control area 3. The box is a dustproof and waterproof enclosed space. The channel controller 33 and the power module are built into it. The channel controller 33 controls the gate to allow one person to pass at a time by releasing a signal.

[0095] The infrared anti-tailgating system 34 is installed on the upper part of the left and right boxes that make up the single-person access control area 3. It consists of a certain number of infrared sensors arranged according to a specific rule. It is electrically connected to the access controller 33. When the access controller 33 receives an authorized pass signal from the access control controller 8, the person passes through. If a person is tailgating, the infrared anti-tailgating system 34 will be triggered to alarm, and the blocking mechanism 35 will execute the blocking mode.

[0096] The blocking mechanism 35 is located in the middle of the single-person passage control area 3. It is electrically connected to the channel controller 33. The channel controller 33 controls whether the blocking mechanism 35 opens and closes to block the passage and achieve physical space isolation.

[0097] The signal converter 4 is installed inside the left side box of the single-person access control area 3 and is electrically connected to the identity recognition device 1 and the access controller 8. Its function is to realize the bidirectional conversion between WG signal and serial RS232 or 485 signal, and to complete the free linking of devices with different communication standards.

[0098] The industrial control host 5, built into the left side of the single-person access control area 3, uses a high-performance industrial computer. It is connected to the identification device 1, electrostatic monitoring device 21, channel controller 33, signal converter 4, and access control controller 8 via a serial port, and to the access information server 6 via a TCP / IP interface. The industrial control host 5 has the core management program of the whole set of equipment built in (including a program formed by using an intelligent electrostatic prevention and control access control method in Example 1, calculating the comprehensive electrostatic value, calculating the comprehensive electrostatic value threshold, and dynamically adjusting the comprehensive electrostatic value threshold). The signal converter 4 collects the ID information transmitted by the identification device 1, stores it temporarily, and waits for the pass signal sent by the electrostatic monitoring device 21. Then, the temporarily stored ID information is transmitted back to the access control controller 8 through the signal converter 4. The access control controller 8 sends an authorization pass signal to the channel controller 33. When the channel controller 33 receives the authorization pass signal from the access control controller 8, the person passes. Subsequently, the channel controller 33 collects the confirmation information of the person who passed and synchronizes the information in real time to the access information server 6. The information can be queried through the management terminal 7 according to the management process.

[0099] Access controller 8, located inside the single-person access control area 3, receives the pass signal from electrostatic detector 211 transmitted in reverse by signal converter 4, as well as temporarily stored ID information. Signal converter 4 then generates a control signal to determine whether the barrier mechanism 35 is authorized to open, and sends this signal to channel controller 33. Channel controller 33 further controls the opening state of barrier mechanism 35. Access controller 8 receives historical data and stores it in access control data server 9 for subsequent data analysis.

[0100] Workflow Description:

[0101] The person to be inspected authenticates their identity through the identity recognition device 1. The identity recognition device 1 reads the card information or biometric information and converts it into a digital signal. The digital signal is transmitted to the industrial control host 5 through the signal converter 4 (such as RS232 / 485 to WG signal converter). After receiving the identity verification information, the industrial control host 5 will temporarily store it and wait for the pass signal sent by the electrostatic detector 211.

[0102] Personnel entering the electrostatic discharge area 2 have their static charge detected by the electrostatic discharge detector 211. If the total static charge value is within its threshold, the electrostatic discharge detector 211 sends a pass signal to the industrial control host 5; if the total static charge value exceeds its threshold, an alarm signal is sent, and personnel are prevented from passing through to perform static discharge until the value meets the threshold. Then, the electrostatic discharge detector 211 sends a pass signal to the industrial control host 5.

[0103] After receiving the pass signal from the electrostatic detector 211, the industrial control host 5 queries the access control database to see if the person has access permission based on the temporarily stored identity verification information (such as personnel ID). If the person to be inspected has access permission, the industrial control host 5 will proceed to the next step; if the person to be inspected does not have access permission, the industrial control host 5 will send a rejection signal to the access control controller 8 to prevent the person from passing, and the blocking mechanism 35 will activate to intercept the person.

[0104] If the person to be inspected has access rights, the industrial control host 5 will convert the identity verification information into a signal format (WG signal) that the access controller 8 can recognize through the signal converter 4. The industrial control host 5 will send the converted pass signal and identity verification information to the access controller 8 as an authorization signal. After receiving the authorization signal, the access controller 8 will keep the barrier mechanism 35 in the normally retracted state, allowing personnel to pass through. Personnel can enter the electrostatic sensitive area through the barrier mechanism 35.

[0105] Furthermore, the LED indicator 213 is always on. When the electrostatic detector 211 detects that the overall electrostatic value does not exceed its threshold, the LED indicator 213 flashes, indicating that the electrostatic discharge device has passed the electrostatic discharge test.

[0106] Furthermore, when the overall electrostatic discharge value of the person to be inspected does not exceed its threshold, the industrial control host 5 receives a pass signal from the electrostatic discharge detector 211. Simultaneously, once the person to be inspected has access permission, the channel status indicator 31 illuminates a green LED, indicating a permitted state and signifying that the channel is in standby mode, meaning personnel can safely pass. When the overall electrostatic discharge value of the person to be inspected exceeds its threshold, or when the person to be inspected does not have access permission, the channel status indicator 31 illuminates a red LED, indicating that the channel is in a prohibited state and personnel should not enter.

[0107] Furthermore, when the passage is inactive, i.e., no personnel attempt to pass and no preset access permissions are activated, the access control authorization status indicator 32 will display a specific color (such as yellow) to indicate that the system is in standby mode. When a person with valid access permissions approaches the passage and triggers the pass signal of the electrostatic detector 211, the access control authorization status indicator 32 will change to another color (such as blue), indicating that the person has been identified and authorized to pass by the industrial control host 5. If the person attempting to pass does not have valid access permissions, or their overall electrostatic value exceeds its threshold, the access control authorization status indicator 32 will display a third color (such as red), clearly indicating that passage is prohibited.

[0108] Furthermore, when the infrared anti-tailgating system 34 installed in the single-person access control area 3 detects an unauthorized intruder (without access rights, or whose overall electrostatic value exceeds its threshold), the infrared anti-tailgating system 34 triggers an alarm mechanism. At the same time, the industrial control host 5 controls the blocking mechanism 35 to switch to blocking mode to prevent the tailgator from entering.

[0109] The core invention lies in the dynamic adjustment of the comprehensive electrostatic value threshold. As for the intelligent electrostatic control access control device involved, any existing technology that can achieve the same function as this invention can be used.

[0110] The above technical features constitute the preferred embodiment of the present invention, which has strong adaptability and optimal implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

[0111] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A smart electrostatic discharge prevention and control method for entrances and exits, characterized in that, Includes the following steps: Step S1: Detect the electrostatic value of the body parts to be identified by the personnel entering the access control area. The body parts to be identified include hands, feet, head, and other parts. The detected electrostatic values ​​of each identification body part are E1, E2, E3, and E4, respectively. Assign weights to the electrostatic values ​​of each identification body part, and calculate the comprehensive electrostatic value E of the personnel using a weighted average algorithm. to ; Step S2: Collect electrostatic measurement data, including comprehensive electrostatic value, environmental data, and personnel information data of personnel entering the workshop at different times according to the set frequency, and construct a dataset; Step S3: Clean and normalize the dataset; train an electrostatic-based LSTM model using the preprocessed dataset; use the trained LSTM model to predict the range of comprehensive electrostatic values ​​over a future period. Step S4: Calculate the mean and fluctuation range of the predicted comprehensive static electricity value for different time periods each day; Step S5: Calculate the average of the predicted comprehensive static electricity values. Its corresponding comprehensive electrostatic value threshold E th The predicted fluctuation range σ1 of the comprehensive electrostatic value is compared with its corresponding fluctuation range threshold σ. th Compare the results; adjust the overall electrostatic value threshold E based on the comparison results. th This includes raising, lowering, or keeping the overall electrostatic threshold E constant. th ; Step S6: Compare the overall electrostatic value of the detected personnel at the access control entrance with the adjusted overall electrostatic value threshold E. th The measured comprehensive static electricity value is compared, and personnel are allowed to pass if the measured comprehensive static electricity value does not exceed the adjusted comprehensive static electricity value threshold.

2. The intelligent electrostatic discharge control access control method according to claim 1, characterized in that, when And σ1 < σ th At that time, the overall electrostatic discharge threshold is increased, and the adjusted overall electrostatic discharge threshold is E′. th =E th ×(1+α), where α is an adjustment coefficient, 0<α<0.

5.

3. The intelligent electrostatic discharge control access control method according to claim 1, characterized in that, when And σ1>σ th When this happens, the overall electrostatic discharge threshold is lowered, and the adjusted overall electrostatic discharge threshold is E′. th =E th ×(1-β), where β is the adjustment coefficient, and 0<β<1.

4. The intelligent electrostatic discharge control access control method according to claim 1, characterized in that, when And σ1 < σ th At the same time, the overall electrostatic value threshold remains unchanged.

5. The intelligent electrostatic discharge control access control method according to claim 3, characterized in that, When 1.1σ tg <σ1 ≤ 1.2σ tg , β ∈ (0 - 0.2); When 1.2σ th <σ1 ≤ 1.5σ tg , β ∈ [0.2 - 0.5); When σ1 > 1.5σ th , β ∈ [0.5 - 1).

6. The intelligent electrostatic discharge prevention and control access control method according to claim 1, characterized in that, In step S1, the weights of the electrostatic values ​​for the hands, feet, head, and other parts are ω1, ω2, ω3, and ω4, respectively, with ω1>ω2>ω3>ω4, and simultaneously satisfying ω1+ω2+ω3+ω4=1. Therefore, the overall electrostatic value is... E to =ω1E1+ω2E2+ω3E3+ω4E4.

7. The intelligent electrostatic discharge control access control method according to claim 1, characterized in that, Step S1 also includes: The ambient humidity H at the access control entrance is obtained, and the weight of the electrostatic value of each recognition part is adaptively adjusted according to the ambient humidity H. The adjustment coefficients for the weights of the hands, feet, head, and other parts are k1, k2, k3, and k4, respectively. The relationship between the adjustment coefficient k1 of the hand weight ω1 and the humidity is: k1=1-0.01×(H-H0); The relationship between the adjustment coefficient k2 of the foot weight ω2 and the humidity is: k2=1-0.008×(H-H0); The relationship between the adjustment coefficient k3 of the head weight ω3 and the humidity is: k3=1-0.005×(H-H0); The relationship between the adjustment coefficient k4 of the weight ω4 of other parts and the humidity is: k4=1-0.003×(H-H0); where H0 is the standard humidity value.

8. The intelligent electrostatic discharge control access control method according to claim 6, characterized in that, Step S1 also includes: The weights of the electrostatic values ​​of each recognition part are adaptively adjusted based on the ambient humidity H. The adjusted weights for the hands, feet, head, and other parts are ω′1=ω1×k1, ω′2=ω2×k2, ω′3=ω3×k3, ω′4=ω4×k4, respectively. The adjusted overall electrostatic value E is... to =ω′1E1+ω′2E2+ω′3E3+ω′4E4.

9. An intelligent electrostatic discharge (ESD) prevention and control access control device, used to execute the intelligent ESD prevention and control access control method according to any one of claims 1-8, characterized in that, include: Identity recognition device, humidity sensor, electrostatic discharge area, single-person access control area, and signal converter, industrial control host, and access controller built into the single-person access control area; An identification device is installed on one side of the single-person access control area to identify the identity of the person to be inspected; the single-person access control area includes boxes on the left and right sides and a channel controller and barrier mechanism installed inside them; a humidity sensor is installed on the box of the single-person access control area; The electrostatic discharge area includes an electrostatic monitoring device and an electrostatic discharge device. The electrostatic monitoring device is located on the cover of the box on the other side of the single-person access control area. The electrostatic monitoring device includes an electrostatic detector, an information display screen, and an LED indicator. The electrostatic detector detects the static charge carried by the person to be inspected, including the comprehensive electrostatic value of the person entering, and displays it on the information display screen. The electrostatic discharge device discharges the carried static electricity. The person can check in real time whether the comprehensive electrostatic value they carry exceeds the preset comprehensive electrostatic value threshold through the information display screen and LED indicator, and at the same time transmit the result to the industrial control host. The industrial control host is built into the single-person access control area cabinet. It is connected to an identity recognition device, an electrostatic monitoring device, a channel controller, a signal converter, an access control controller, and a humidity sensor via a serial port. The industrial control host collects the ID information transmitted from the identity recognition device and the pass signal sent from the electrostatic detector, and then feeds it back to the access control controller. The access control controller sends an authorization signal to the channel controller to control the barrier mechanism, allowing personnel to pass.

10. The intelligent electrostatic discharge control access control device according to claim 9, characterized in that, The single-person access control area also includes a channel status indicator device, which is installed on the side of the single-person access control area and is electrically connected to the channel controller. It is used to indicate the standby and prohibited access status of the channel where the single-person access control area is located.

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