Interlocking device and laboratory access control system
By using an interlocking device to detect the front window and operating area with a magnetic switch and an infrared or microwave radar probe, the laboratory access control is forcibly locked, which solves the safety loopholes caused by human negligence in biosafety cabinets and achieves efficient biosafety protection and automated auditing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 深圳市茗格科技有限公司
- Filing Date
- 2026-03-30
- Publication Date
- 2026-04-28
AI Technical Summary
Existing biosafety cabinets have a safety vulnerability where the front window may not close due to human negligence at the moment of shutdown, leading to contamination and biosafety hazards. Current technology lacks effective mandatory protective measures.
An interlocking device is used to detect the opening of the front window and whether there are people in the operating area through a magnetic switch and an infrared or microwave radar probe. When the conditions are met, the control module forcibly locks the laboratory access control to prevent the front window from being left open.
It effectively reduces the accidental operation rate of leaving the front window open, eliminates the risk of positive pressure backflow and pollution, improves biosafety, and automatically links with the access control system through the log module, reducing manual recording costs and errors.
Smart Images
Figure CN224176989U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of security protection technology, and in particular to an interlocking device and a laboratory access control system. Background Technology
[0002] Biosafety cabinets are core equipment in the primary biosafety barrier of laboratories. They are designed to protect operators, the laboratory environment, and experimental samples when handling potentially infectious microorganisms and aerosols through directional airflow, HEPA (High-Efficiency Particulate Air) filtration, and exhaust systems. According to international standards such as NSF / ANSI 49 and EN12469, strict operating procedures must be followed during the operation and shutdown of biosafety cabinets, with the control of the front window height being one of the key aspects.
[0003] However, in actual laboratory operations, especially in scenarios with high-frequency use or frequent shift changes, the execution of the above shutdown procedures relies entirely on the strict self-discipline of the operators. Existing biosafety cabinets have significant safety blind spots: their control logic typically only focuses on abnormal alarms during operation, neglecting safety vulnerabilities caused by human negligence during shutdown. Especially for novice or improperly operated users, it is easy to accidentally disconnect the power without closing the front window. Once such an operation occurs, the cabinet loses its negative pressure protection, and contaminated air trapped in the work area or air duct will directly diffuse outward through the open front window or backflow onto the air filter surface. This not only causes cross-contamination of valuable samples and experimental failure, but more seriously, it can lead to moisture or blockage of the HEPA filter, shortening its lifespan, and even causing leakage of pathogenic microorganisms, posing a serious biosafety hazard. Utility Model Content
[0004] The main purpose of this application is to propose an interlocking device and a laboratory access control system, which aims to solve problems such as experimental contamination and safety hazards caused by negligence in personnel operation and failure to close cabinet windows in a timely manner.
[0005] To achieve the above objectives, this application provides an interlocking device, comprising: a trigger detection module, which includes a first detection unit and a second detection unit; the first detection unit is disposed at the lower edge of the cabinet and is used to output a first detection signal when it detects that the opening of the front window of the cabinet is greater than a set threshold; the second detection unit is disposed above the operating area of the cabinet and is used to output a second detection signal when it detects that no one is present in the operating area of the cabinet for a period of time greater than a set time; a control module, the first end of which is coupled to the trigger detection module and is used to output a first control signal after receiving the first and second detection signals; and an interlock execution module, the first end of which is coupled to the laboratory access control system and the other end of which is coupled to the control module; the interlock execution module locks the laboratory access control system to a closed state after receiving the first control signal.
[0006] In one embodiment, the first detection unit includes: a magnet switch, which is disposed at the lower edge of the cabinet and is a normally closed switch; and a magnet, which is disposed at the bottom of the front window and is used in conjunction with the magnet switch; wherein, the first detection unit is used to control the magnet switch to open and send a first detection signal to the control module when the distance between the magnet switch and the magnet is greater than a set distance.
[0007] In one embodiment, the second detection signal includes an infrared detection probe, which is positioned above the operating area of the cabinet and is used to detect the presence of personnel within the operating area of the cabinet.
[0008] In one embodiment, the second detection signal includes a microwave radar probe, which is positioned above the operating area of the cabinet and is used to detect the presence of personnel within the operating area of the cabinet.
[0009] In one embodiment, the interlocking device further includes an alarm module coupled to the control module, which is used to trigger a voice alarm and a light alarm upon receiving a first control signal.
[0010] In one embodiment, the interlocking device further includes a log module, which is coupled to the control module and the laboratory access control system. The log module is configured to record the number of times the interlocking execution module locks the laboratory access control system to the closed state, the corresponding time, and personnel information when it receives a first control signal output by the control module and / or communication with the laboratory access control system.
[0011] In one embodiment, the log module includes: a recording unit coupled to the control module and the laboratory access control system, the recording unit being configured to record the number of times the interlock execution module locks the laboratory access control system to the closed state, the corresponding time, and personnel information; and a communication unit coupled to the recording unit, the communication unit being used to push the recorded data of the recording unit to the mobile terminal in real time.
[0012] In one embodiment, the control module integrates a clock calibration unit, which is used to synchronize network time and ensure that the recording time accuracy of the log module is less than the accuracy threshold.
[0013] This application also proposes a laboratory access control system, which includes: a biosafety cabinet; an interlocking device, a first end of which is coupled to the biosafety cabinet; and a laboratory access control device, which is coupled to a second end of the interlocking device; wherein the interlocking device is the interlocking device described in any of the embodiments above.
[0014] In one embodiment, the laboratory access control system further includes: multiple biosafety cabinets; multiple laboratory access control devices; an interlocking device, one end of which is connected to each biosafety cabinet, and the other end of which is coupled to each laboratory access control device; wherein the interlocking device is used to control all laboratory access control devices to close when any biosafety cabinet is not closed.
[0015] The interlocking device used in this application includes: a trigger detection module, which includes a first detection unit and a second detection unit; the first detection unit is located at the lower edge of the cabinet and outputs a first detection signal when it detects that the opening of the front window of the cabinet is greater than a set threshold; the second detection unit is located above the operating area of the cabinet and outputs a second detection signal when it detects that no one has been in the operating area of the cabinet for a period of time longer than a set time; a control module, the first end of which is coupled to the trigger detection module and outputs a first control signal after receiving the first and second detection signals; and an interlock execution module, the first end of which is coupled to the laboratory access control system and the other end of which is coupled to the control module; the interlock execution module locks the laboratory access control system to a closed state after receiving the first control signal. Through the above method, the presence of personnel and the closure of the front window of the biological cabinet are detected using the first and second detection units. When both personnel are absent and the front window is not closed, the interlock execution module forcibly closes the laboratory access control system to avoid experimental contamination or biosafety problems caused by the experimenter's negligence in leaving the front window open. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the interlocking device provided in this application.
[0018] Figure 2 This is a structural schematic diagram of an embodiment of the cabinet provided in this application.
[0019] Figure 3 This is a schematic diagram of the structure of the second embodiment of the interlocking device provided in this application.
[0020] Figure 4 This is a schematic diagram of the structure of the third embodiment of the interlocking device provided in this application.
[0021] Figure 5 This is a schematic diagram of the structure of an embodiment of the log module provided in this application.
[0022] Figure 6 This is a schematic diagram of an embodiment of the laboratory access control system provided in this application.
[0023] Explanation of icon numbers:
[0024] 100. Interlocking device; 1. Trigger detection module; 11. First detection unit; 111. Magnet switch; 112. Magnet; 12. Second detection unit; 2. Control module; 3. Interlocking execution module; 4. Laboratory access control; 5. Alarm module; 6. Log module; 61. Recording unit; 62. Communication unit; A. Cabinet; A1. Front window; B. Operating area.
[0025] 200. Laboratory access control system; 210. Biosafety cabinet.
[0026] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0028] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0029] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0030] In traditional biosafety cabinet operations, novice lab technicians often neglect to close the front window before shutting down, leading to backflow of positive pressure airflow inside the cabinet. This contaminates samples, HEPA filters, and the laboratory environment, posing a biosafety hazard. Current technologies often use audible and visual alarms to alert staff that the front window is open, but lack enforcement measures, allowing technicians to ignore alarms and leave. Some solutions use differential pressure sensors, but these sensors are susceptible to drift due to ambient airflow, resulting in a false alarm rate as high as 20%. Laboratory safety audits require manual recording of the front window's open / closed status, which cannot be automatically linked to access control logs, increasing manual recording costs and the risk of errors.
[0031] Therefore, this application proposes an interlocking device and a laboratory access control system to solve the above problems.
[0032] Please see Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the structure of the first embodiment of the interlocking device provided in this application; Figure 2 This is a structural schematic diagram of an embodiment of the cabinet provided in this application; the interlocking device 100 includes: a trigger detection module 1, a control module 2, and an interlocking execution module 3.
[0033] Specifically, the trigger detection module 1 includes a first detection unit 11 and a second detection unit 12. The first detection unit 11 is located at the lower edge of cabinet A and is used to output a first detection signal when the opening of the front window A1 of cabinet A is greater than a set threshold. The second detection unit 12 is located above the operating area B of cabinet A and is used to output a second detection signal when the time when no one is present in the operating area B of cabinet A is greater than a set time. The first end of the control module 2 is coupled to the trigger detection module 1 and is used to output a first control signal after receiving the first and second detection signals. The first end of the interlock execution module 3 is coupled to the laboratory access control 4, and the other end of the interlock execution module 3 is coupled to the control module 2. After receiving the first control signal, the interlock execution module 3 locks the laboratory access control 4 to the closed state.
[0034] It should be noted that in some embodiments, cabinet A refers to biosafety cabinet 210, and front window A1 refers to front window A1 on biosafety cabinet 210.
[0035] In one embodiment, the interlocking execution module 3 locks the laboratory access control 4 to the closed state. This is achieved by electrically connecting the coil ends of several contact relays to the control module 2, with the contact ends connected in series to the 12V electric lock power supply circuit of the access control system. When both the "front window A1 is not closed" and "operation area B is unoccupied" signals are received simultaneously (i.e., after the first and second detection signals), the relays disconnect, cutting off the power supply to the access control electric lock, and the access control cannot be opened. After the front window A1 is closed, the relays reactivate, restoring the access control card swiping permission.
[0036] Understandably, in one embodiment, a set of normally closed reed switches is fixed to a single Class II biosafety cabinet, an infrared detector is installed above the cabinet, and an interlock module is connected in series to the laboratory single-door access control electric lock circuit; when the experimenter leaves and the front window A1 is not closed, the access control cannot be opened, and at the same time, a voice and light alarm is triggered; after the front window A1 is closed, the access control returns to normal.
[0037] The technical solution of this application uses a first detection unit 11 and a second detection unit 12 to detect the presence of personnel and the closure of the front window A1 of the biosafety cabinet A. When both personnel are absent and the front window A1 is not closed, the interlock execution module 3 forcibly closes the laboratory access control 4 to prevent experimental contamination or biosafety problems caused by the experimenter's negligence in leaving the front window A1 open. It is understood that the interlock device 100 set in the above method is applicable to the operational control of various Class II biosafety cabinets.
[0038] In one feasible embodiment, such as Figure 2As shown, the first detection unit 11 includes: a magnet switch 111, which is located at the lower edge of cabinet A and is a normally closed switch; and a magnet 112, which is located at the bottom of the front window A1 and is used in conjunction with the magnet switch 111. The first detection unit 11 is used to control the magnet switch 111 to open and send a first detection signal to the control module 2 when the distance between the magnet switch 111 and the magnet 112 is greater than a set distance.
[0039] In one embodiment, the first detection unit 11 is a reed switch: a normally closed reed switch is fixed to the lower edge of the biosafety cabinet body A, and the magnet 112 is fixed to the bottom of the front window A1; when the opening of the front window A1 is greater than a set threshold, for example, when the opening of the front window A1 is >20mm, the reed switch is open and a signal that the front window A1 is not closed is sent to the control module 2; when the front window A1 is completely closed, the reed switch is closed and a normal signal is sent.
[0040] In one embodiment, the control module 2 may be an MCU, including but not limited to. It should be noted that an MCU is a microcomputer that integrates a central processing unit (CPU), memory (RAM / ROM), input / output interfaces (I / O), and various peripherals (such as timers and analog-to-digital converters) onto a single chip. Simply put, it is a simplified version of a computer specifically designed to perform specific control tasks.
[0041] In one feasible embodiment, the second detection signal includes an infrared detection probe, which is positioned above the operating area B of cabinet A, and is used to detect the presence of personnel in the operating area B of cabinet A.
[0042] Understandably, using infrared detection probes to detect the presence of personnel in operating area B is a cost-effective and low-power solution with mature technology, demonstrating reliable performance in scenarios involving lateral movement of personnel or entry / exit of areas. Since it does not actively emit electromagnetic waves, it is ideal for simple automation scenarios requiring strict control of electromagnetic interference or extremely low power consumption, such as lighting control and basic presence / absence detection. For example, in one embodiment, the detection range of the infrared detection probe is 1m × 1m; when the operating area is detected to be unoccupied for >3s, an unoccupied signal is sent to control module 2, triggering the access control interlock operation.
[0043] In one feasible embodiment, the second detection signal includes a microwave radar probe, which is positioned above the operating area B of cabinet A, and is used to detect the presence of personnel in the operating area B of cabinet A.
[0044] Understandably, the solution of using a microwave radar probe to detect the presence of personnel in operating area B is advantageous because it can detect minute human movements and even breathing fluctuations, effectively addressing the technical limitation of infrared probes in identifying stationary individuals. This ensures accurate identification of presence even when the operator remains stationary for extended periods. Furthermore, microwave signals can penetrate non-metallic materials, allowing for completely concealed installation of the probe. This not only ensures a smooth and easy-to-clean surface but also reduces susceptibility to interference from environmental factors such as temperature and airflow, making it particularly effective in complex scenarios requiring high-reliability safety interlocks.
[0045] In one feasible embodiment, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of the second embodiment of the interlocking device provided in this application; the interlocking device 100 also includes: an alarm module 5, which is coupled to the control module 2, and is used to trigger a voice alarm and a light alarm after receiving a first control signal.
[0046] As is understandable, the alarm module 5 is also equipped with voice prompts, such as "Please close the front window A1 of the biosafety cabinet," while simultaneously driving the red LED to flash. The alarm trigger threshold is "front window A1 not closed + no one > 3s," that is, when the control module 2 receives the first detection signal and the second detection signal at the same time. When the front window A1 is detected to be closed, the alarm is deactivated.
[0047] In one feasible embodiment, such as Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of the third embodiment of the interlocking device provided in this application; the interlocking device 100 also includes: a log module 6, which is coupled to the control module 2 and the laboratory access control 4. The log module 6 is configured to record the number of times, the corresponding time and personnel information when it receives the first control signal output by the control module 2 and / or the communication of the laboratory access control 4.
[0048] In one embodiment, the log module 6 has built-in storage and communicates with the access control card reader via a UART serial port. It automatically collects and records information such as "event time - user ID - front window A1 opening degree" and generates a CSV format log. The log can be exported via a USB interface without the need for host computer software. In another embodiment, the function of the log module 6 can be implemented using a control module 2, which has built-in storage.
[0049] In one feasible embodiment, such as Figure 5 As shown, Figure 5This is a schematic diagram of the structure of an embodiment of the log module provided in this application; the log module 6 includes: a recording unit 61, which is coupled to the control module 2 and the laboratory access control 4, and is configured to record the number of times the interlock execution module 3 locks the laboratory access control 4 to the closed state, the corresponding time, and personnel information; and a communication unit 62, which is coupled to the recording unit 61, and is used to push the recorded data of the recording unit 61 to the mobile terminal in real time.
[0050] Understandably, by using communication unit 62, recorded data can be uploaded in real time. For example, abnormal logs can be pushed to the laboratory administrator's mobile phone in real time, so that the administrator can obtain information and make corrections in a timely manner.
[0051] In one feasible embodiment, the control module 2 integrates a clock calibration unit, which is used to synchronize network time to ensure that the recording time accuracy of the log module 6 is less than an accuracy threshold. For example, synchronizing network time ensures that the recording time accuracy of the log module 6 is less than 1 second.
[0052] It should be noted that each module in the above embodiments is powered by 12VDC, sharing the power supply with existing access control systems, and has a standby power consumption of <0.5W. The module input signal is a passive dry contact, and the output signal is a 12VDC switching signal, suitable for any brand of Class II biosafety cabinets and mainstream access control systems. In one embodiment, except for the trigger detection module, the other modules of the interlock module can be integrated into one unit, for example, with an overall size of 50mm×30mm×15mm, which can be directly embedded in a wall-mounted 86-type junction box.
[0053] Through the above methods, and by using hardware interlocking for forced constraints, the misoperation rate of the safety cabinet's front window A1 being open has been reduced from 12% to 0.3%, completely eliminating the risk of positive pressure backflow and contamination, and achieving effective safety control. By utilizing the log module 6 to automatically link with the access control system, auditors can export data with one click, saving more than 90% of manual recording time and improving audit efficiency. It is plug-and-play, requires no modification to the internal circuitry of the safety cabinet, is suitable for new cabinet installations and old cabinet retrofits, has strong compatibility, and is easy to install.
[0054] This application also proposes a laboratory access control system 200, such as Figure 6 As shown, Figure 6This is a schematic diagram of an embodiment of the laboratory access control system provided in this application; the laboratory access control system 200 includes a biosafety cabinet 210; an interlocking device 100, the first end of which is coupled to the biosafety cabinet 210; and a laboratory access control 4, which is coupled to the second end of the interlocking device 100; the specific structure of the interlocking device 100 is as described in the above embodiment. Since the laboratory access control system 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0055] In one embodiment, the laboratory access control system 200 further includes: a plurality of biosafety cabinets 210; a plurality of laboratory access gates 4; an interlocking device 100, one end of which is connected to each biosafety cabinet 210, and the other end of which is coupled to each laboratory access gate 4; wherein the interlocking device 100 is used to control all laboratory access gates 4 to close when any biosafety cabinet 210 is not closed.
[0056] In one embodiment, when multiple biosafety cabinets 210 and multiple laboratory access control systems 4 are involved, an extended RS-485 communication interface is used to cascade 32 reed switches, corresponding to 32 biosafety cabinets; multiple laboratory access control systems 4 are all linked to this module, and when the front window A1 of any biosafety cabinet is not closed and no one is present, all associated access control systems cannot be opened; the log module 6 records the number and status of different biosafety cabinets.
[0057] In the embodiments of this application, the interlocking device 100 includes: a trigger detection module 1, which includes a first detection unit 11 and a second detection unit 12; the first detection unit 11 is disposed at the lower edge of cabinet A, and is used to output a first detection signal when the opening of the front window A1 of cabinet A is greater than a set threshold; the second detection unit 12 is disposed above the operating area B of cabinet A, and is used to output a second detection signal when the time when no one is present in the operating area B of cabinet A is greater than a set time; a control module 2, the first end of which is coupled to the trigger detection module 1, and is used to output a first control signal after receiving the first detection signal and the second detection signal; and an interlock execution module 3, the first end of which is coupled to the laboratory access control 4, and the other end of which is coupled to the control module 2; after receiving the first control signal, the interlock execution module 3 locks the laboratory access control 4 to a closed state.
[0058] Using the above method, the presence of personnel and the closure of the front window A1 of the biological cabinet A are detected by the first detection unit 11 and the second detection unit 12. When both the absence of personnel and the front window A1 are not closed are met, the interlock execution module 3 forcibly closes the laboratory access control 4 to avoid experimental contamination or biosafety problems caused by the experimenter's negligence in operating the experiment window A1 not being closed.
[0059] The above are merely exemplary embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.
Claims
1. An interlocking device, characterized in that, The interlocking device includes: The trigger detection module includes a first detection unit and a second detection unit. The first detection unit is located at the lower edge of the cabinet and is used to output a first detection signal when the opening of the front window of the cabinet is greater than a set threshold. The second detection unit is located above the operating area of the cabinet and is used to output a second detection signal when the operating area of the cabinet is unoccupied for a period of time greater than a set time. A control module, the first end of which is coupled to the trigger detection module, is used to output a first control signal after receiving the first detection signal and the second detection signal; An interlocking execution module is provided, with its first end coupled to the laboratory access control system and its other end coupled to the control module. Upon receiving the first control signal, the interlocking execution module locks the laboratory access control system to a closed state.
2. The interlocking device as described in claim 1, characterized in that, The first detection unit includes: A magnetic switch is provided at the lower edge of the cabinet and is a normally closed switch. A magnet is disposed at the bottom of the front window and is used in conjunction with a magnet switch; The first detection unit is used to control the magnet switch to disconnect and send a first detection signal to the control module when the distance between the magnet switch and the magnet is greater than a set distance.
3. The interlocking device as described in claim 1, characterized in that, The second detection signal includes: An infrared detection probe is installed above the operating area of the cabinet and is used to detect the presence of personnel within the operating area of the cabinet.
4. The interlocking device as described in claim 1, characterized in that, The second detection signal includes: A microwave radar probe is installed above the operating area of the cabinet, and the microwave radar probe is used to detect the presence of personnel in the operating area of the cabinet.
5. The interlocking device as described in claim 1, characterized in that, The interlocking device also includes: An alarm module, coupled to the control module, is used to trigger a voice alarm and a light alarm upon receiving the first control signal.
6. The interlocking device as described in claim 1, characterized in that, The interlocking device also includes: A log module, coupled to the control module and the laboratory access control system, is configured to record the number of times the interlock execution module locks the laboratory access control system to the closed state, the corresponding time, and personnel information when it receives the first control signal output by the control module and / or the communication of the laboratory access control system.
7. The interlocking device as described in claim 6, characterized in that, The log module includes: A recording unit, coupled to the control module and the laboratory access control system, is configured to record the number of times the interlock execution module locks the laboratory access control system to the closed state, the corresponding time, and personnel information; A communication unit is coupled to the recording unit and is used to push the recorded data of the recording unit to the mobile terminal in real time.
8. The interlocking device as described in claim 6, characterized in that, The control module integrates a clock calibration unit, which is used to synchronize network time and ensure that the recording time accuracy of the log module is less than the accuracy threshold.
9. A laboratory access control system, characterized in that, The laboratory access control system includes: Biosafety cabinet; Interlocking device, the first end of which is coupled to the biosafety cabinet; Laboratory access control, wherein the laboratory access control is coupled to the second end of the interlocking device; The interlocking device is the interlocking device as described in any one of claims 1-8.
10. The laboratory access control system as described in claim 9, characterized in that, The laboratory access control system also includes: Multiple biosafety cabinets; Multiple laboratory access control systems; An interlocking device, one end of which is coupled to each of the biosafety cabinets, and the other end of which is coupled to each of the laboratory access gates; wherein the interlocking device is used to control all the laboratory access gates to close when any biosafety cabinet is not closed.