A cipher lock for a differential pressure transmitter

Abstract

The utility model discloses a kind of password locks for differential pressure transmitter, including lockbox and with the first password lock of lockbox cooperation, the lockbox further includes second password lock, the lockbox includes first lockbox and second lockbox, the first lockbox and second lockbox between with hinged mode connection, the rear end of first lockbox or second lockbox is connected with side opening door by hinged mode, the second password lock is set on the end face of side opening door, the second password lock includes shell and the control unit being arranged in shell, control unit electrically connected with control assembly, the first lockbox is connected with hinged mode as hinge or pivot between second lockbox. Unauthorized personnel is avoided to operate differential pressure transmitter at will, leading to differential pressure transmitter measured value distortion, cause to carry out trade settlement with differential pressure transmitter measured value Measurement dispute.

Description

Technical Field

[0001] This utility model belongs to the field of industrial automation instrumentation technology, specifically relating to a combination lock for a differential pressure transmitter. Background Technology

[0002] Differential pressure transmitters are widely used in industrial process control and trade settlement measurement. The permission to modify their parameters (such as range, zero-point calibration, output signal, etc.) directly affects the accuracy of the measurement. Traditional differential pressure transmitters lack effective anti-tampering mechanisms, which may lead to unauthorized personnel misoperating or maliciously tampering with parameters, causing measurement distortion and resulting in trade settlement disputes.

[0003] In view of the above factors, a combination lock for differential pressure transmitters is provided, ensuring that only metrology professionals who know the unlocking code can operate the protective device of the differential pressure transmitter. This solves the problem of unauthorized personnel operating differential pressure transmitters in traditional technologies. Utility Model Content

[0004] The purpose of this invention is to provide a combination lock for differential pressure transmitters to solve the problems mentioned in the background art.

[0005] The purpose of this utility model is achieved through the following technical solution: a combination lock for a differential pressure transmitter, comprising a lock box and a first combination lock cooperating with the lock box, the lock box further comprising a second combination lock, the lock box comprising a first lock box and a second lock box, the first lock box and the second lock box being connected in a hinged manner;

[0006] The rear end of the first lock box or the second lock box is connected to a side door by a hinge, and the second combination lock is set on the end face of the side door;

[0007] The second combination lock includes a housing and a control unit located inside the housing, the control unit being electrically connected to the control components.

[0008] Furthermore, the first lock box and the second lock box are connected by a hinge or a pivot.

[0009] Furthermore, the first lock box and the second lock box are configured with a symmetrical hollow structure.

[0010] Furthermore, the control component includes a control motor fixedly connected inside the side door, the output end of the control motor being connected to a drive rod, the drive rod being a screw structure, and at least two sets of sliding grooves being opened inside the side door, the sliding grooves corresponding to the mating grooves opened on the first lock box or the second lock box.

[0011] Furthermore, two sets of control motors are provided, and the drive rods connected to the output ends of the control motors are movably engaged with the docking plate, and the docking plate is slidably connected to the slide groove.

[0012] Furthermore, the docking plate is threadedly connected to the drive rod, and under the drive of the control motor, the docking plate is driven to move towards and away from the mating groove until it contacts and moves away from the mating groove.

[0013] Furthermore, the control unit adopts a microcontroller with an ARM Cortex-M4 core. The second combination lock inputs a password and controls the motor to drive the drive rod to rotate, thereby causing the docking plate to extend and retract on the side wall of the side-opening door through the slide groove.

[0014] Furthermore, a position sensor is provided in the mating groove. The position sensor is a proximity sensor and is electrically connected to the control unit.

[0015] The control unit drives the motor to rotate, thereby causing the docking plate to move along the slide groove towards the mating groove. When the docking plate reaches the preset distance value of the position sensor, the control unit stops controlling the motor to rotate.

[0016] Furthermore, the second combination lock is also equipped with a face recognition module, which includes a 3D structured light camera. The 3D structured light camera is electrically connected to a feature recognition chip, and the feature recognition chip is electrically connected to a control unit. The feature recognition chip uses a Hi3516CV500 series chip.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention employs a combination of a first combination lock and a second combination lock, allowing for simultaneous use. The first combination lock uses a publicly available 6-digit dial lock format. The differential pressure transmitter is enclosed within a lockbox. After the lock is engaged, rotating the dial on the 6-digit combination lock will result in an incorrect sequence of digits. When opening the enclosure to operate the differential pressure transmitter, authorized personnel must rotate the dial, input the correct 6-digit combination, and press the switch for the lock to open.

[0019] The lockbox is also equipped with a second combination lock, which is an electronic lock. If the first combination lock malfunctions, the side door can be opened using the second combination lock to retrieve the item.

[0020] This invention prevents unauthorized personnel from arbitrarily operating the differential pressure transmitter, which could lead to distorted measurement values ​​and cause measurement disputes related to trade settlements based on differential pressure transmitter measurements. Furthermore, the lockbox can still be opened even if either the first or second combination lock is damaged. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0022] Figure 2 This is a utility model Figure 1 Plan view;

[0023] Figure 3 This is a plan view of the present invention with a second combination lock;

[0024] Figure 4 This is a schematic diagram of the control unit and feature recognition chip of this utility model;

[0025] Figure 5 This is a schematic diagram of the control component of this utility model;

[0026] Figure 6 This is a utility model Figure 5 Enlarged schematic diagram of the control components. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 this utility model 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 this utility model.

[0030] like Figure 1-6As shown, a combination lock for a differential pressure transmitter includes a lock box 1 and a first combination lock 2 that cooperates with the lock box 1. The lock box 1 also includes a second combination lock 3. The lock box 1 includes a first lock box 30 and a second lock box 40, and the first lock box 30 and the second lock box 40 are connected by a hinge.

[0031] The rear end of the first lock box 30 or the second lock box 40 is connected to a side door 5 by a hinge, and the second combination lock 3 is set on the end face of the side door 5;

[0032] The second combination lock 3 includes a housing 6 and a control unit 7 disposed within the housing 6. The control unit 7 is electrically connected to the control component 8.

[0033] To facilitate opening the lock box via a hinge during use, the first lock box 30 and the second lock box 40 are connected by a hinge or a pivot.

[0034] To facilitate the storage of the differential pressure transmitter in the lock box during use, the first lock box 30 and the second lock box 40 are configured with a symmetrical hollow structure.

[0035] To facilitate operation, the control component 8 includes a control motor 9 fixedly connected inside the side door 5. The output end of the control motor 9 is connected to a drive rod 10, which is a screw structure. At least two sets of sliding grooves 11 are opened inside the side door 5. The sliding grooves 11 correspond to the mating grooves 12 opened on the first lock box 30 or the second lock box 40.

[0036] To facilitate the movement of the mating plate by controlling the drive rod via the control motor during use, two sets of control motors 9 are provided. The drive rod 10 connected to the output end of the control motor 9 is movably engaged with the mating plate 13. The mating plate 13 is slidably connected to the slide groove 11, and the mating plate 13 is threadedly connected to the drive rod 10. Under the drive of the control motor 9, the mating plate 13 is driven to move towards and away from the mating groove 12 until it contacts and moves away from the mating groove 12.

[0037] When the second combination lock is entered, the signal is first transmitted to the control unit of the combination lock for verification. The control unit is responsible for checking whether the entered password is correct. Once the verification is successful, that is, the entered password matches the preset password, the control unit will send a command to the motor to move. The control unit can realize the rotation of the motor to drive the docking plate to extend and retract.

[0038] To facilitate electronic control via the control unit during use, the control unit 7 uses a microcontroller with an ARM Cortex-M4 core. The second combination lock 3 inputs a password, and the control motor 9 drives the drive rod 10 to rotate, thereby causing the docking plate 13 to extend and retract on the side wall of the side door 5 via the slide groove 11.

[0039] For ease of use, a position sensor 14 is provided in the mating groove 12. The position sensor 14 is a proximity sensor and is electrically connected to the control unit 7.

[0040] The control unit 7 drives the motor 9 to rotate, thereby causing the drive rod 10 to rotate, which in turn causes the docking plate 13 to move along the slide groove 11 toward the mating groove 12. When the docking plate 13 reaches the preset distance value of the position sensor 14, the control unit 7 stops controlling the motor 9 to rotate.

[0041] By setting up a face recognition module, a second combination lock can be opened by a specific authorized person. The second combination lock 3 is also equipped with a face recognition module, which includes a 3D structured light camera 15. The 3D structured light camera 15 is electrically connected to a feature recognition chip 17, and the feature recognition chip 17 is electrically connected to a control unit 7. The feature recognition chip 17 adopts the Hi3516CV500 series chip.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A combination lock for a differential pressure transmitter, comprising a lock box (1) and a first combination lock (2) cooperating with the lock box (1), characterized in that: The lock box (1) also includes a second combination lock (3). The lock box (1) includes a first lock box (30) and a second lock box (40), and the first lock box (30) and the second lock box (40) are connected by a hinge. The rear end of the first lock box (30) or the second lock box (40) is connected to a side door (5) by a hinge, and the second combination lock (3) is set on the end face of the side door (5); The second combination lock (3) includes a housing (6) and a control unit (7) disposed in the housing (6), and the control unit (7) is electrically connected to the control component (8).

2. The combination lock for a differential pressure transmitter according to claim 1, characterized in that: The first lock box (30) and the second lock box (40) are connected by a hinge or a pivot.

3. The combination lock for a differential pressure transmitter according to claim 2, characterized in that: The first lock box (30) and the second lock box (40) are arranged in a symmetrical structure.

4. The combination lock for a differential pressure transmitter according to claim 3, characterized in that: The control component (8) includes a control motor (9) fixedly connected inside the side door (5). The output end of the control motor (9) is connected to a drive rod (10). The drive rod (10) is a screw structure. At least two sets of sliding grooves (11) are opened inside the side door (5). The sliding grooves (11) correspond to the mating grooves (12) opened on the first lock box (30) or the second lock box (40).

5. The combination lock for a differential pressure transmitter according to claim 4, characterized in that: Two sets of control motors (9) are provided. The drive rod (10) connected to the output end of the control motor (9) is movably engaged with the docking plate (13). The docking plate (13) is slidably connected with the slide groove (11).

6. The combination lock for a differential pressure transmitter according to claim 5, characterized in that: The docking plate (13) is threadedly connected to the drive rod (10). Under the drive of the control motor (9), the docking plate (13) is driven to move towards and away from the mating groove (12) until it contacts and moves away from the mating groove (12).

7. The combination lock for a differential pressure transmitter according to claim 6, characterized in that: The control unit (7) uses a microcontroller with an ARM Cortex-M4 core. The second password lock (3) inputs a password and drives the drive rod (10) to rotate by controlling the motor (9), thereby driving the docking plate (13) to extend and retract on the side wall of the side door (5) through the slide groove (11).

8. The combination lock for a differential pressure transmitter according to claim 7, characterized in that: A position sensor (14) is provided in the mating groove (12). The position sensor (14) is a proximity sensor and is electrically connected to the control unit (7). The control unit (7) drives the control motor (9) to rotate and drive the drive rod (10) to rotate, thereby causing the docking plate (13) to move along the slide (11) towards the mating groove (12). When the docking plate (13) reaches the preset distance value of the position sensor (14), the control unit (7) stops the rotation of the control motor (9).

9. The combination lock for a differential pressure transmitter according to claim 8, characterized in that: The second combination lock (3) is also equipped with a face recognition module, which includes a 3D structured light camera (15), the 3D structured light camera (15) is electrically connected to a feature recognition chip (17), and the feature recognition chip (17) is electrically connected to a control unit (7); The feature recognition chip (17) uses the Hi3516CV500 series chip.

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