Laboratory special experiment equipment power supply safety management and control method and system

Abstract

The invention relates to a laboratory special experimental equipment power supply safety control method and system. The method comprises the steps that an experimental equipment operation area is shot in real time through a camera; monitoring voltage and current parameters of the experimental equipment in real time; analyzing the real-time shot image through the NVR intelligent box, and judging whether the number of operators in the operation area meets the requirement or not and whether the operators exceed the red line or not in the experiment operation process; quantizing an analysis and judgment result, voltage and current parameters into safety factors through the intelligent power supply switching device, and calculating a safety threshold value in combination with a time period safety weight T; and executing power supply control according to the safety threshold value W. The method and the system can realize intelligent safety management and control on the power supply of the special experimental equipment in the laboratory, thereby eliminating the potential safety hazard of the laboratory and avoiding the occurrence of experimental safety accidents.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply safety control, and in particular to a power supply safety control method and system for special laboratory experimental equipment. Background Art

[0002] In the laboratory, some specialized equipment requires power to be disconnected and stopped immediately upon leaving the laboratory. At least one, or even two, operators must be present during the entire experiment. Some specialized equipment requires operators to remain within designated operating limits or operate beyond these limits for extended periods. Some equipment requires voltage and current monitoring to prevent operation beyond thresholds. Otherwise, it can easily lead to laboratory safety incidents or prevent accidents from being addressed promptly. Examples include autoclaves, high-pressure reactors, rotary evaporators, centrifuges, hot plates, electrophoresis apparatuses, gas generators, laser cutters, and CNC lathes. However, during actual experiments, operators can easily forget to power off equipment due to negligence, unexpected tasks, phone calls, or dozing off. Alternatively, they can disable some functions (such as the display) without fully shutting off the power, or leave the equipment operating unattended. This can easily lead to laboratory safety incidents. This situation is more prominent in university laboratories. Laboratory explosions have occurred in university laboratories before, causing property losses and casualties.

[0003] Existing technical solutions for power supply safety management of specialized laboratory equipment primarily rely on relatively traditional approaches, such as strengthening laboratory safety training to enhance safety awareness among laboratory operators; strengthening training in laboratory equipment operation skills and conducting regular safety drills; developing safe operating procedures and laboratory safety management systems to enhance operators' sense of responsibility; and installing leakage protection and overcurrent protection devices. These are conventional, relatively traditional safety management solutions. There is a relative lack of new technical approaches and solutions for power supply safety management that leverage electronic information technology, artificial intelligence, computer networks, and storage. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and system for safe power supply management of special laboratory experimental equipment in a laboratory. The method and system can realize intelligent and safe power supply management of special laboratory experimental equipment in a laboratory, thereby eliminating laboratory safety hazards and avoiding the occurrence of experimental safety accidents.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a method for safely controlling power supply of special laboratory equipment, comprising the following steps:

[0006] (1) Use a camera to capture real-time images of the experimental equipment operating area;

[0007] (2) Real-time monitoring of voltage and current parameters of experimental equipment;

[0008] (3) Analyze the real-time captured images through the NVR smart box to determine whether the number of operators in the operation area meets the requirements and whether the operators exceed the red line during the experimental operation;

[0009] (4) The intelligent power supply switching device is used to quantify whether the number of operators in the operating area meets the requirements, whether the operators exceed the red line during the experimental operation, and the voltage and current parameters into safety factors P, Q, V, and I respectively. Combined with the time period safety weight T, the safety domain value W = P × Q × V × I × T is calculated;

[0010] (5) Perform power control according to the safety threshold value W:

[0011] When W=1 and manually triggered, the power is turned on;

[0012] When W is lower than the preset threshold, a graded warning or forced power off is triggered.

[0013] Furthermore, when the system is deployed, the NVR smart box first collects a base map of the connected camera, marks and demarcates the control area of the experimental equipment that needs power control on the base map, and enters the device ID for the experimental equipment together with the base map. Figure 1 Store it in the internal storage unit of the NVR smart box;

[0014] After the system starts working, the NVR smart box will compare and analyze the real-time images with the base map to determine whether there are a specified number of operators in the operating area of the corresponding experimental equipment, and whether the operators have exceeded the red line during the experimental operation.

[0015] Furthermore, the calculation method of the safety factor P is:

[0016] Safety factor P is used to quantify whether the number of operators in the operating area meets the requirements. n ) represents the safety factor P obtained at the nth moment; if the number of operators at the nth moment meets the requirements:

[0017] P(t n )=1(n∈Z and n≥0)......(1)

[0018] Where Z represents a set of integers;

[0019] If the number of operators at the nth moment does not meet the requirements:

[0020] P(t n) = 0.5 (n ∈ Z and n ≥ 0)......(2)

[0021] The calculation formula for the safety factor P is:

[0022] P = P * P(t n+1 )......(3)

[0023] Set the initial time: P = P(t0) = 1;

[0024] When P(t n+1 ) ≠ P(t n ) then n = 0 and start timing over; Obtain the value of P from formula (3), and 0 < P ≤ 1; When P(t n ) = 1, as the timing time increases, P remains 1 all the time, indicating that the safety factor is the largest during this period and it is least likely to have a safety accident; Otherwise, when P(t n ) < 1, as the timing time increases, P tends to 0, indicating that the safety factor is getting smaller and the possibility of having a safety accident is getting larger;

[0025] The calculation method for the safety factor Q is:

[0026] The safety factor Q is used to quantify whether the operator conducts experimental operations beyond the red line. Use Q(t n ) to represent the safety factor Q obtained at the nth moment; If the operator does not conduct experimental operations beyond the red line at the nth moment, then:

[0027] Q(t n ) = 1 (n ∈ Z and n ≥ 0)......(4)

[0028] If the operator conducts experimental operations beyond the red line at the nth moment, then:

[0029] Q(t n ) = 0.8 (n ∈ Z and n ≥ 0)......(5)

[0030] The calculation formula for the safety factor Q is:

[0031] Q = Q * Q(t n+1 )......(6)

[0032] Set the initial time: Q = Q(t0) = 1;

[0033] When Q(t n+1 ) ≠ Q(t n ) then n = 0 and start timing over; Obtain the value of Q from formula (6), and 0 < Q ≤ 1; When Q(t n) = 1. As the timing time increases, the safety factor Q remains 1 all the time, indicating that the safety coefficient is the largest during this period and it is least likely to have a safety accident; otherwise, when Q(t n ) < 1, as the timing time increases, Q tends to 0, indicating that the safety coefficient is getting smaller and the possibility of a traffic safety accident is getting greater.

[0034] Furthermore, the calculation method of the safety factor V is as follows:

[0035] The safety factor V is used to quantify the voltage parameter. Let V(t n ) represent the safety factor V obtained at the t n -th moment; if the voltage is within the normal range at the t n -th moment, then:

[0036] V(t n ) = 1 (n ∈ Z and n ≥ 0)......(7)

[0037] If the voltage is undervoltage at the t n -th moment, then:

[0038] V(t n ) = 0.8 (n ∈ Z and n ≥ 0)......(8)

[0039] If the voltage is overvoltage at the t n -th moment, then:

[0040] V(t n ) = 0.3 (n ∈ Z and n ≥ 0)......(9)

[0041] The calculation formula of the safety factor V is:

[0042] V = V * V(t n+1 )......(10)

[0043] Set the initial moment: V = V(t0) = 1;

[0044] When V(t n+1 ) ≠ V(t n ), then n = 0 and the timing starts over; the value of V is obtained from formula (10), and 0 < V ≤ 1; when V(t n ) = 1, as the timing time increases, the safety factor V remains 1 all the time, indicating that the safety coefficient is the largest during this period and it is least likely to have a safety accident; otherwise, when V(t n ) < 1, as the timing time increases, V tends to 0, indicating that the safety coefficient is getting smaller and the possibility of a traffic safety accident is getting greater;

[0045] The calculation method of the safety factor I is:

[0046] Safety factor I is used to quantify current parameters, using I(t n ) represents the tth n Factor I obtained at the moment t; n When the current is within the normal range:

[0047] I(t n )=1(n∈Z and n≥0)......(11)

[0048] No. t n If the current is overcurrent:

[0049] I(t n )=0(n∈Z and n≥0)......(12)

[0050] The calculation formula of safety factor I is:

[0051] I=I*I(t n+1 )......(13)

[0052] When overcurrent occurs, the safety factor I=0, that is, the safety factor is as small as 0; at this time, the highest level of safety warning is given.

[0053] Furthermore, the calculation method of the safety threshold value W is:

[0054] Multiply the safety factors P, Q, V, and I by the time period safety weight T to obtain the power safety threshold of the experimental equipment:

[0055] W=P*Q*V*I*T.......(14)

[0056] Among them, W is the safety domain value, which is used to evaluate the safety level of the experimental equipment; T is the time period safety weight, and different weight values are set according to different time periods; 0≤W≤1, W changes from 1→0, the corresponding experimental equipment power supply safety continues to decrease, and the warning level continues to increase until the power switch is automatically cut off.

[0057] Furthermore, initially, the intelligent power switching device is in the disconnected state, and the safety domain value W is in the initial state, that is, W=1; after starting work, the value of W is calculated at each moment; if W=1, the current state S of the power switch is obtained, S=1 indicates that the power is turned on at this time and there is no safety risk, and the value of W is returned to continue to be calculated; S=0 indicates that the power is in the disconnected state, waiting for the external trigger button to touch the state K, K=1 turns on the power, and K=0 returns to continue to calculate the value of W; after turning on the power, continue to detect whether the external trigger button is touched. If so, it means that the power is turned off manually, and the power disconnection operation is executed; if W≠1, corresponding prompts, warnings or power disconnection operations are performed according to the value of W.

[0058] Further, when the safety domain value is in the range of 0.5 < W < 1, a safety prompt sound is given; when the safety domain value is in the range of 0.02 ≤ W < 0.5, a third-level warning sound is given; when the safety domain value is in the range of 0.005 ≤ W < 0.02, a second-level warning sound is given; when the safety domain value is in the range of 0.0003 ≤ W < 0.005, a first-level audible and visual alarm is given; when the safety domain value is in the range of W < 0.0003, the device power supply is automatically disconnected, indicating that there are extremely high safety risks in the experimental operation, experimental equipment, or laboratory at this time.

[0059] The present invention also provides a power safety control system for special experimental equipment in a laboratory for implementing the above method, including a camera, an NVR intelligent box, an intelligent power switching device, and a control system APP;

[0060] The camera is electrically connected to the NVR intelligent box and is used to capture images of the experimental equipment operation area and transmit them to the NVR intelligent box;

[0061] The NVR intelligent box is equipped with an image analysis and processing algorithm module, which is used to analyze the images captured by the camera in real time, determine whether the number of operators in the operation area meets the requirements and whether the operators exceed the red line during the experimental operation, and then associate the analysis and judgment results with the device ID and send them in a broadcast form;

[0062] The intelligent power switching device communicates wirelessly with the NVR intelligent box to receive the analysis and judgment results of the NVR intelligent box; the intelligent power switching device also monitors the voltage and current parameters of the experimental equipment; the intelligent power switching device is equipped with a safety analysis and decision control algorithm module, which is used to calculate the safety domain value W based on whether the number of operators in the operation area meets the requirements, whether the operators exceed the red line during the experimental operation, and the voltage and current parameters, and perform power control according to the safety domain value W;

[0063] The control system APP is used for device binding, operation log recording, and safety specification prompting.

[0064] Further, the intelligent power switching device includes a main control unit, a high-current thyristor, a high-current magnetic latching relay, a current monitoring unit, a voltage monitoring unit, an external trigger push-button switch, a Bluetooth communication module, and an RTC clock module; the safety analysis and decision control algorithm module is installed on the main control unit; the voltage monitoring unit and the current monitoring unit are used to monitor the voltage and current parameters of the experimental equipment; the high-current thyristor and the high-current magnetic latching relay form a double-switch structure, the high-current thyristor is used for instantaneous conduction, and the high-current magnetic latching relay is used for continuous conduction; the external trigger push-button switch is used for external trigger touch; the Bluetooth communication module is used for wireless communication with the NVR intelligent box and the APP control system.

[0065] Furthermore, the intelligent power supply switching device is provided with an identification QR code for binding with special equipment.

[0066] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a method and system for power supply safety management and control of special laboratory experimental equipment. The method and system, through the coordinated work of various system components such as cameras, NVR smart boxes, and intelligent power supply switching devices, collect relevant safety factor information, analyze the safety risks of personnel, environment, electrical characteristics, etc. during the use of special equipment, and add time period safety weights to evaluate safety risks and make comprehensive decisions and controls, thereby realizing the systematization and intelligence of power supply safety management and control of special laboratory equipment. It not only greatly improves management efficiency, but also can eliminate laboratory power supply safety hazards caused by human factors such as negligence, forgetfulness, and lack of safety awareness during experimental operations, make up for the lack and deficiency of laboratory power supply safety management technology information means, ensure the safety of experimental equipment and laboratories, and has strong practicality and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 This is a diagram of the system composition architecture of an embodiment of the present invention;

[0068] Figure 2 This is a block diagram of the components of the intelligent power switching device in an embodiment of the present invention;

[0069] Figure 3 This is a decision flow chart of the intelligent power switching device in an embodiment of the present invention. DETAILED DESCRIPTION

[0070] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0071] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0072] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0073] This embodiment provides a method and system for safely managing the power supply of special experimental equipment in a laboratory, which is mainly used for the safe management and control of the power supply of special experimental equipment (such as high-pressure sterilizers, high-pressure reactors, rotary evaporators, centrifuges, hot plates, electrophoresis apparatuses, gas generators, laser cutting machines, CNC lathes, etc.) in laboratories (especially university laboratories).

[0074] like Figure 1 As shown, the power safety management and control system for special laboratory equipment includes a camera, an NVR smart box, an intelligent power supply switching device, and a management and control system app. The camera is electrically connected to the NVR smart box to capture images of the experimental equipment operating area and transmit them to the NVR smart box. The NVR smart box is equipped with an image analysis and processing algorithm module, which analyzes the real-time images captured by the camera to determine whether the number of operators in the operating area meets the requirements and whether operators exceed the red line during experimental operations. The analysis and judgment results are then associated with the device ID and broadcasted. The intelligent power supply switching device wirelessly communicates with the NVR smart box to receive the NVR smart box's analysis and judgment results. The intelligent power supply switching device also monitors the voltage and current parameters of the experimental equipment. The intelligent power supply switching device is equipped with a safety analysis and decision-making control algorithm module, which calculates the safety threshold value W based on whether the number of operators in the operating area meets the requirements, whether operators exceed the red line during experimental operations, and the voltage and current parameters, and performs power control based on the safety threshold value W. The management and control system app is used for device binding, operation log recording, and safety compliance reminders.

[0075] Install multiple cameras in the laboratory where special experimental equipment is placed to ensure that the cameras can cover the entire laboratory space without blind spots (currently, network cameras are installed in most university laboratories). The cameras are connected to the NVR smart box. When the system is deployed, the NVR smart box first collects a base map for each camera connected, marks and demarcates the control area of each experimental equipment that needs power control on the base map, and encodes the device ID for the experimental equipment, together with the base map. Figure 1 The data is stored in the system (NVR smart box internal storage unit).

[0076] After the system starts up, the NVR smart box integrates real-time image information with the base map for analysis. It determines whether the required number of operators are within the operating area of each experimental device and whether any operators have crossed red lines during the experiment. The analysis results are matched to the experimental device ID and transmitted as a broadcast frame via low-power, long-range Bluetooth. (For example, 0x0001, 0x00 indicates no operator in the operating area of device 1; 0x0002, 0x01 indicates one operator in the operating area of device 2). All intelligent power supply disconnectors in the laboratory receive the analysis results from the NVR smart box.

[0077] The intelligent power switching device is an intelligent power switch that includes a main control unit (CPU), a high-current thyristor, a high-current magnetic latching relay, a current monitoring unit, a voltage monitoring unit, an external contact button switch, a Bluetooth communication module, an RTC clock module, and an identification QR code bound to a special device. Its block diagram is as follows Figure 2 As shown:

[0078] like Figure 2 As shown, the intelligent power supply switching device includes a main control unit, a high-current thyristor, a high-current magnetic latching relay, a current monitoring unit, a voltage monitoring unit, an external trigger push button switch, a Bluetooth communication module, and an RTC clock module. The safety analysis and decision-making control algorithm module is installed on the main control unit. The voltage monitoring unit and the current monitoring unit are used to monitor the voltage and current parameters of the experimental equipment. The high-current thyristor and the high-current magnetic latching relay form a dual-switch structure, with the high-current thyristor for instantaneous conduction and the high-current magnetic latching relay for continuous conduction. The external trigger push button is used for external triggering. The Bluetooth communication module is used for wireless communication with the NVR smart box and the app management system. The intelligent power supply switching device also has an identification QR code for binding to special equipment.

[0079] The main control CPU is responsible for intelligent analysis, decision-making, and control of the entire device. The Bluetooth communication unit enables communication with the NVR box and mobile phone. The RTC clock unit provides a time basis for system security assessment. The voltage and current monitoring unit monitors the voltage and current parameters of the connected equipment in real time.

[0080] Magnetic latching relays and thyristors are two types of switches. A magnetic latching relay is equivalent to a mechanical switch, while a thyristor is an electronic switch. When a relay is closed with a large current, it will generate arcs and sparks, which can easily burn out the contacts and affect the service life of the relay. However, after it is closed, its on-resistance is extremely small and it is not easy to generate heat. The thyristor is just the opposite. It allows large current impact at the moment of conduction without generating sparks. However, once it is turned on, its on-resistance is much larger than that of the relay, and it generates a lot of heat. If a large current is turned on for a long time, it is easy to burn out the thyristor. The intelligent switching device of the present invention integrates a thyristor and a magnetic latching relay. In the short time of cutting off and closing, the thyristor is activated first, and then the relay is activated. In this way, the advantages of the two devices are fully utilized, so that the intelligent switching device can not only carry large currents, but also ensure the stability and service life of the switching device.

[0081] An intelligent power switching device is installed on the power cord of each experimental device (either with both the neutral and live wires connected together or with a single live wire). Its outer surface is affixed with a QR code that binds the experimental device's ID to the device ID in the area marked during NVR smart box deployment. A built-in Bluetooth module can receive broadcast frames sent by the NVR smart box. The intelligent switching device uses time as the primary factor, integrating spatial, sensor, and status factors with sensor information to perform intelligent analysis and decision-making on whether to power the device on or off, whether to issue a prompt tone, and whether to generate an audible and visual alarm signal. This ensures the safety of personnel and equipment during experimental operations and eliminates potential laboratory safety accidents caused by inadvertently powering off equipment after experimental operations.

[0082] This embodiment also provides a method for safely controlling power supply of laboratory special experimental equipment based on the above system, which includes the following steps:

[0083] (1) Use a camera to capture real-time images of the experimental equipment operating area.

[0084] (2) Real-time monitoring of the voltage and current parameters of the experimental equipment.

[0085] (3) Analyze the real-time captured images through the NVR smart box to determine whether the number of operators in the operation area meets the requirements and whether the operators exceed the red line during the experimental operation.

[0086] When the system is deployed, the NVR smart box first collects a base map of the connected camera, marks and demarcates the control area of the experimental equipment that needs power control on the base map, and enters the device ID for the experimental equipment together with the base map. Figure 1 Store it in the internal storage unit of the NVR smart box;

[0087] After the system starts working, the NVR smart box will compare and analyze the real-time images with the base map to determine whether there are a specified number of operators in the operating area of the corresponding experimental equipment, and whether the operators have exceeded the red line during the experimental operation.

[0088] (4) The intelligent power supply switching device is used to quantify whether the number of operators in the operating area meets the requirements, whether the operators exceed the red line during the experimental operation, and the voltage and current parameters into safety factors P, Q, V, and I respectively. Combined with the time period safety weight T, the safety domain value W = P×Q×V×I×T is calculated.

[0089] (5) Perform power control according to the safety threshold value W:

[0090] When W=1 and manually triggered, the power is turned on;

[0091] When W is lower than the preset threshold, a graded warning or forced power off is triggered.

[0092] The process of performing safety analysis and intelligent decision-making control on the intelligent power switching device is further described below.

[0093] 1. Obtain safety factors or sensor information that affect experimental operations and experimental equipment safety

[0094] The elements that the intelligent switching device obtains from the NVR smart box and the sensor information and elements that it can obtain from itself are:

[0095] (1) Whether the number of operators in the operating area meets the requirements;

[0096] (2) Whether the operator has exceeded the red line in conducting experimental operations;

[0097] (3) The on / off status of the device power before the current moment;

[0098] (4) Time and time records of each element when it is obtained;

[0099] (5) Voltage parameters;

[0100] (6) Current parameters;

[0101] (7) Whether the button has a touch action.

[0102] 2. Numerate elements or sensor information into different safety factors

[0103] Factor 1: Safety factor P

[0104] Safety factor P is used to quantify whether the number of operators in the operating area meets the requirements. n ) represents the safety factor P obtained at the nth moment; if the number of operators at the nth moment meets the requirements:

[0105] P(t n ) = 1 (n ∈ Z and n ≥ 0)......(1)

[0106] Where Z represents the set of integers.

[0107] If the number of operators at the nth moment does not meet the requirements, then:

[0108] P(t n ) = 0.5 (n ∈ Z and n ≥ 0)......(2)

[0109] The calculation formula for the safety factor P is:

[0110] P = P * P(t n+1 )......(3)

[0111] Set the initial moment: P = P(t0) = 1.

[0112] When P(t n+1 ) ≠ P(t n ), then n = 0 and start timing again; obtain the P value from formula (3), and 0 < P ≤ 1; when P(t n ) = 1, as the timing time increases, P remains 1 all the time, indicating that the safety factor is the largest during this period and it is least likely to have a safety accident; otherwise, when P(t n ) < 1, as the timing time increases, P → 0 (P approaches 0), indicating that the safety factor is getting smaller and the possibility of having a safety accident is getting larger. The value of the safety factor P will be used as an input parameter for the subsequent evaluation of the safety domain of the equipment power supply (here, "domain" refers to the range, not the threshold).

[0113] Element 1: Safety factor Q

[0114] The safety factor Q is used to quantify whether the operator conducts experimental operations beyond the red line. Use Q(t n ) to represent the safety factor Q obtained at the nth moment; if the operator does not conduct experimental operations beyond the red line at the nth moment, then:

[0115] Q(t n ) = 1 (n ∈ Z and n ≥ 0)......(4)

[0116] If the operator conducts experimental operations beyond the red line at the nth moment, then:

[0117] Q(t n ) = 0.8 (n ∈ Z and n ≥ 0)......(5)

[0118] The calculation formula for the safety factor Q is:

[0119] Q = Q * Q(t n+1 )......(6)

[0120] Set the initial time: Q = Q(t0) = 1.

[0121] When Q(t n+1 ) ≠ Q(t n ), then n = 0 and start timing again; obtain the Q value from formula (6), and 0 < Q ≤ 1; when Q(t n ) = 1, as the timing time increases, the safety factor Q remains 1 all the time, indicating that the safety factor is the largest during this period and it is least likely to have a safety accident; otherwise, when Q(t n ) < 1, as the timing time increases, Q → 0 (Q approaches 0), indicating that the safety factor is getting smaller and the possibility of a traffic safety accident is getting larger. The value of the safety factor Q will be used as an input parameter for the subsequent evaluation of the safety domain of the equipment power supply.

[0122] Element 3: Safety factor V

[0123] The safety factor V is used to quantify the voltage parameter, and V(t n ) represents the safety factor V obtained at the t n -th moment; if the voltage at the t n -th moment is within the normal range, then:

[0124] V(t n ) = 1 (n ∈ Z and n ≥ 0)......(7)

[0125] If the voltage at the t n -th moment is undervoltage, then:

[0126] V(t n ) = 0.8 (n ∈ Z and n ≥ 0)......(8)

[0127] If the voltage at the t n -th moment is overvoltage, then:

[0128] V(t n ) = 0.3 (n ∈ Z and n ≥ 0)......(9)

[0129] The calculation formula for the safety factor V is:

[0130] V = V * V(t n+1 )......(10)

[0131] Set the initial time: V = V(t0) = 1.

[0132] When V(t n+1 ) ≠ V(t n) When n = 0, the timing restarts; the value of V is obtained from formula (10), and 0 < V ≤ 1; when V(t n ) = 1, as the timing time increases, the safety factor V remains 1 all the time, indicating that the safety factor is the largest during this period and it is least likely to have a safety accident; otherwise, when V(t n ) < 1, as the timing time increases, V → 0 (V approaches 0), indicating that the safety factor is getting smaller and the possibility of a travel safety accident is getting larger. The value of the safety factor V will be used as an input parameter for the subsequent evaluation of the equipment power supply safety domain; from formulas (8) and (9), it can be seen that when overvoltage occurs, the safety factor V converges relatively quickly (i.e., the value decreases relatively quickly) and is relatively easy to trigger an alarm, while when undervoltage occurs, the safety factor V converges slowly and the relative waiting time for triggering an alarm is longer.

[0133] Element 4: Safety factor I

[0134] The safety factor I is used to quantify the current parameter, and I(t n ) represents the factor I obtained at the t n -th moment; when the current at the t n -th moment is within the normal range, then:

[0135] I(t n ) = 1 (n ∈ Z and n ≥ 0)......(11)

[0136] When the current at the t n -th moment is overcurrent, then:

[0137] I(t n ) = 0 (n ∈ Z and n ≥ 0)......(12)

[0138] The calculation formula for the safety factor I is:

[0139] I = I * I(t<� n+1 )......(13)

[0140] From formula (12), it can be seen that when overcurrent occurs, the safety factor I = 0, that is, the safety factor is as small as 0; at this time, the highest-level safety warning is given. The value of the safety factor I will be used as an input parameter for the subsequent evaluation of the equipment power supply safety domain.

[0141] 3. Calculate the safety domain value W

[0142] Multiply the safety factors P, Q, V, and I by the time period safety weight T to obtain the experimental equipment power supply safety domain value:

[0143] W = P * Q * V * I * T.......(14)

[0144] Among them, W is the safety threshold value, which is used to evaluate the safety level of the experimental equipment; T is the time period safety weight, and different weight values can be set and adjusted according to different time periods (for example: T = 1 during the time period of 08:00 - 20:00; T = 0.8 during the time period of 20:01 - 23:59; T = 0.5 during the time period of 00:00 - 07:59).

[0145] As can be seen from formula (14): 0 ≤ W ≤ 1. As W decreases from 1 to 0, the power supply safety of the corresponding experimental equipment continuously decreases, while the warning level continuously increases until the power switch is automatically cut off.

[0146] 4. Comprehensive analysis, autonomous decision-making, and execution of actions such as prompting, warning, or autonomous switching of the switch

[0147] Analysis and decision-making mainly perform fusion analysis and decision-making based on the on or off state of the power supply, the safety threshold value W, external input signals (touch actions of the reset button), etc. under the current state, and perform corresponding actions such as turning on or off the equipment power supply, emitting a prompt sound, and emitting an audible and visual alarm signal. The decision-making process is as Figure 3 shown.

[0148] Initially, the intelligent power switching device is in the off state, and the safety threshold value W is in the initial state (i.e., W = 1); after starting to work, the value of W is calculated in minutes according to the time (i.e., calculated once per minute); if W = 1, obtain the current state S of the power switch (on: S = 1; off: S = 0). S = 1 indicates that the power supply is already on and there is no safety risk, and return to continue calculating the value of W; S = 0 indicates that the power supply is in the off state, waiting for the touch state K of the external trigger button (yes: K = 1; no: K = 0). K = 1 turns on the power supply, and K = 0 returns to continue calculating the value of W; after turning on the power supply, continue to detect whether the external trigger button is touched. If so, it means that the power supply is to be turned off manually, and perform the operation of disconnecting the power supply; if W ≠ 1, perform corresponding prompting, warning, or power-off operations according to the value of W (if the current power supply is already off, power-on is not allowed until the safety threshold W = 1 and there is no safety risk for each safety factor, and power-on is allowed).

[0149] In this embodiment, a safety prompt sound is given when the safety threshold value is in the range of 0.5 < W < 1; a third-level warning sound is given when the safety threshold value is in the range of 0.02 ≤ W < 0.5; a second-level warning sound is given when the safety threshold value is in the range of 0.005 ≤ W < 0.02; a first-level audible and visual alarm is given when the safety threshold value is in the range of 0.0003 ≤ W < 0.005; when the safety threshold value is in the range of W < 0.0003, the equipment power supply is automatically disconnected, indicating that there are great safety risks in the current experimental operation, experimental equipment, or laboratory.

[0150] The decision flow chart shows that when the device power is disconnected, in order to restart it, all safety factors must be at their maximum values, that is, the safety domain W = 1. Furthermore, the operator must press the trigger button to allow the device to power on. This effectively prevents the device from erroneously starting up when unattended. When the device power is already on, the intelligent switching device continuously analyzes and calculates the value of the safety domain W and initiates an alarm action of the appropriate level based on the value. When the safety domain is extremely small, indicating an extremely high safety risk, the intelligent switching device automatically disconnects the power supply, ensuring the safety of the operator and laboratory equipment.

[0151] From the decision-making process, we can know that to power on the experimental equipment, you must press the reset button and perform a reset operation. This step must be performed by someone. This ensures that only when an operator is within the operating area or two operators are present at the same time (some special equipment requires two operators to be present at the same time during experimental operation) can the equipment power be turned on. If at some point, the operator leaves the experimental equipment operating area, the intelligent cut-off device will automatically cut off the power supply of the experimental equipment based on the information sent by the NVR smart box that there are no operators or fewer than two operators in the equipment operating area. The smart box will enter the on-duty state and wait until the number of operators meets the requirement and performs another reset operation before the power switch can be closed again to power the experimental equipment.

[0152] When the experimental operator wants to use the equipment, he needs to use the mobile phone APP of the special equipment management system to scan the QR code on the smart cutting device that is bound to the equipment ID. The system will automatically identify which equipment the operator wants to use, and display the experimental equipment operating specifications and precautions to the operator, reminding the operator to use the experimental equipment in a standardized and safe manner. At the same time, the APP will also require the operator to turn on the Bluetooth of the mobile phone to pair with it. After establishing communication, the APP will send the device ID and binding information to the smart cutting device. The smart cutting device will send the last record recorded in the local device power cutting time log to the APP and transmit it to the system background server. At the same time, the information of the current operator is also synchronously recorded in the form of a log and stored on the system background server. In this way, the on and off time of the equipment power and the operator and other information are all saved in the system in the form of a log.

[0153] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0154] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0155] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0156] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0157] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention remain within the scope of protection of the present invention.

Claims

1. A method for safe power supply control of special laboratory equipment, characterized in that: The following steps are involved: (1) Use a camera to capture real-time images of the experimental equipment operating area; (2) Real-time monitoring of voltage and current parameters of experimental equipment; (3) Analyze the real-time captured images through the NVR smart box to determine whether the number of operators in the operation area meets the requirements and whether the operators exceed the red line during the experimental operation; (4) The intelligent power supply switching device is used to quantify whether the number of operators in the operating area meets the requirements, whether the operators exceed the red line during the experimental operation, and the voltage and current parameters into safety factors P, Q, V, and I respectively. Combined with the time period safety weight T, the safety domain value W = P × Q × V × I × T is calculated; (5) Perform power control according to the safety threshold value W: When W=1 and manually triggered, the power is turned on; When W is lower than the preset threshold, a graded warning or forced power off is triggered.

2. A method for safe control of power supply of special laboratory equipment according to claim 1, characterized in that: When the system is deployed, the NVR smart box first collects a base map of the connected cameras, marks and demarcates the control area of the experimental equipment that needs power control on the base map, and assigns the device ID to the experimental equipment. The device ID is stored together with the base map in the internal storage unit of the NVR smart box. After the system starts working, the NVR smart box will compare and analyze the real-time images with the base map to determine whether there are a specified number of operators in the operating area of the corresponding experimental equipment, and whether the operators have exceeded the red line during the experimental operation.

3. A method for safe control of power supply of special laboratory equipment according to claim 1, characterized in that: The calculation method of safety factor P is: Safety factor P is used to quantify whether the number of operators in the operating area meets the requirements. n ) represents the safety factor P obtained at the nth moment; if the number of operators at the nth moment meets the requirements: P(t n )=1(n∈Z and n≥0)......(1) Where Z represents a set of integers; If the number of operators at the nth moment does not meet the requirements: P(t n )=0.5(n∈Z and n≥0)......(2) The calculation formula of safety factor P is: P=P*P(t n+1 )......(3) Set the initial time: P = P(t0) = 1; When P(t n+1 ) ≠ P(t n ), then n = 0 and the timing restarts; the P value is obtained from formula (3), and 0 < P ≤ 1; when P(t n ) = 1, and P remains 1 as the timing time increases, indicating that the safety factor is the largest during this time period and it is least likely to have a safety accident; otherwise, when P(t n ) < 1, as the timing time increases, P tends to 0, indicating that the safety factor is getting smaller and the possibility of having a safety accident is getting larger; The calculation method of safety factor Q is: Safety factor Q is used to quantify whether the operator has exceeded the red line in experimental operation, and Q(t n ) represents the safety factor Q obtained at the nth moment; if the operator does not cross the red line during the experimental operation at the nth moment: Q(t n )=1(n∈Z and n≥0)......(4) At the nth moment, the operator crosses the red line to perform the experimental operation: Q(t n )=0.8(n∈Z and n≥0)......(5) The calculation formula of safety factor Q is: Q=Q*Q(t n+1 )......(6) Set the initial time: Q = Q(t0) = 1; When Q(t n+1 ) ≠ Q(t n ), then n = 0 and the timing restarts; the Q value is obtained from formula (6), and 0 < Q ≤ 1; when Q(t n ) = 1, as the timing time increases, the safety factor Q remains 1 all the time, indicating that the safety factor is the largest during this time period and it is least likely to have a safety accident; otherwise, when Q(t n ) < 1, as the timing time increases, Q tends to 0, indicating that the safety factor is getting smaller and the possibility of a traffic safety accident is getting greater.

4. A method for safe control of power supply of special laboratory equipment according to claim 1, characterized in that: The calculation method of safety factor V is: The safety factor V is used to quantify the voltage parameter, and V(t n ) represents the tth n The safety factor V obtained at the moment t; n If the voltage is within the normal range at all times: V(t n )=1(n∈Z and n≥0)......(7) No. t n If the voltage is undervoltage at the moment: V(t n )=0.8(n∈Z and n≥0)......(8) No. t n If the voltage is overvoltage at the moment: V(t n )=0.3(n∈Z and n≥0)......(9) The calculation formula of safety factor V is: V=V*V(t n+1 )......(10) Set the initial time: V = V(t0) = 1; When V(t n+1 ) ≠ V(t n ), then n = 0 and the timing restarts; the value of V is obtained from formula (10), and 0 < V ≤ 1; when V(t n ) = 1, as the timing time increases, the safety factor V also remains 1 all the time, indicating that the safety factor is the largest during this period and it is least likely to have a safety accident; otherwise, when V(t n ) < 1, as the timing time increases, V tends to 0, indicating that the safety factor is getting smaller and the possibility of a traffic safety accident is getting larger; The calculation method of safety factor I is: Safety factor I is used to quantify current parameters, using I(t n ) represents the tth n Factor I obtained at the moment t; n When the current is within the normal range: I(t n )=1(n∈Z and n≥0)......(11) No. t n If the current is overcurrent: I(t n )=0(n∈Z and n≥0)......(12) The calculation formula of safety factor I is: I=I*I(t n+1 )......(13) When overcurrent occurs, the safety factor I=0, that is, the safety factor is as small as 0; at this time, the highest level of safety warning is given.

5. A method for safe control of power supply of special laboratory equipment according to claim 1, characterized in that: The calculation method of the safety threshold value W is: Multiply the safety factors P, Q, V, and I by the time period safety weight T to obtain the power safety threshold of the experimental equipment: W=P*Q*V*I*T.......(14) Among them, W is the safety domain value, which is used to evaluate the safety level of the experimental equipment; T is the time period safety weight, and different weight values are set according to different time periods; 0≤W≤1, W changes from 1→0, the corresponding experimental equipment power supply safety continues to decrease, and the warning level continues to increase until the power switch is automatically cut off.

6. A method for safe control of power supply of laboratory special experimental equipment according to claim 1, characterized in that: Initially, the intelligent power switching device is in the off state, and the safety threshold value W is in the initial state, i.e., W = 1. After starting to work, calculate the value of W according to the time. If W = 1, obtain the state S of the current power switch. S = 1 indicates that the power is on at this time and there is no safety risk, then return to continue calculating the value of W. S = 0 indicates that the power is in the off state, waiting for the external trigger button touch state K. K = 1 turns on the power, and K = 0 returns to continue calculating the value of W. After turning on the power, continue to detect whether the external trigger button is touched. If so, it means that someone wants to turn off the power manually, and perform the power-off operation. If W ≠ 1, perform corresponding prompts, warnings or power-off operations according to the value of W.

7. A method for safe control of power supply of special laboratory equipment according to claim 6, characterized in that: When the safety threshold value is in the range of 0.5 < W < 1, give a safety prompt sound; when the safety threshold value is in the range of 0.02 ≤ W < 0.5, give a level-three warning sound; when the safety threshold value is in the range of 0.005 ≤ W < 0.02, give a level-two warning sound; when the safety threshold value is in the range of 0.0003 ≤ W < 0.005, give a level-one audible and visual alarm; when the safety threshold value is in the range of W < 0.0003, automatically turn off the device power, indicating that there are great safety risks in the experimental operation, experimental equipment or laboratory at this time.

8. A laboratory special experimental equipment power supply safety management and control system for implementing the method according to any one of claims 1 to 7, characterized in that: It includes a camera, an NVR intelligent box, an intelligent power switching device and a control system APP; The camera is electrically connected to the NVR intelligent box and is used to capture images of the experimental equipment operation area and transmit them to the NVR intelligent box; An image analysis and processing algorithm module is installed on the NVR intelligent box and is used to analyze the images captured by the camera in real time, judge whether the number of operators in the operation area meets the requirements and whether the operators exceed the red line during the experimental operation, and then associate the analysis and judgment results with the device ID and send them in a broadcast form; The intelligent power switching device communicates wirelessly with the NVR intelligent box to receive the analysis and judgment results of the NVR intelligent box; the intelligent power switching device also monitors the voltage and current parameters of the experimental equipment; a safety analysis and decision control algorithm module is installed on the intelligent power switching device and is used to calculate the safety threshold value W according to whether the number of operators in the operation area meets the requirements, whether the operators exceed the red line during the experimental operation, and the voltage and current parameters, and perform power control according to the safety threshold value W; The control system APP is used for device binding, operation log recording and safety specification prompts.

9. A laboratory special experimental equipment power supply safety management and control system according to claim 8, characterized in that: The intelligent power supply switching device includes a main control unit, a high-current thyristor, a high-current magnetic latching relay, a current monitoring unit, a voltage monitoring unit, an external trigger button switch, a Bluetooth communication module and an RTC clock module; the safety analysis and decision control algorithm module is installed on the main control unit; the voltage monitoring unit and the current monitoring unit are used to monitor the voltage and current parameters of the experimental equipment; the high-current thyristor and the high-current magnetic latching relay form a dual-switch structure, the high-current thyristor is used for instantaneous conduction, and the high-current magnetic latching relay is used for continuous conduction; the external trigger button switch is used for external trigger touch; the Bluetooth communication module is used for wireless communication with the NVR smart box and APP management and control system.

10. A laboratory special experimental equipment power supply safety management and control system according to claim 9, characterized in that: The intelligent power supply switching device is provided with an identification QR code for binding with special equipment.

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