Double-layer laser eavesdropping blocking film

Abstract

The utility model relates to a double-layer laser eavesdropping blocking film, which comprises a film body and at least two extrusion pieces, the extrusion pieces are arranged in the film body, and circularly changed suction force and repulsive force are applied between the two extrusion pieces; liquid flow channels are arranged in the film body in a spreading mode, are evenly distributed in the plane direction of the film body and are located between the two extrusion pieces, and the liquid flow channels are filled with semitransparent liquid. Compared with a blocking film in the prior art, the blocking film has the advantages that the two extrusion pieces are matched in the blocking film, so that the flexibility of the film body is matched to continuously extrude and release semitransparent liquid in the liquid flow channel, and the semitransparent liquid continuously moves in the film body; according to the utility model, a dynamic interference on a transmitted light beam can be realized, so that the light beam is reflected in a disordered manner or in a non-fixed direction and is difficult to capture, and therefore, the blocking effect is better, and the safety is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of anti-eavesdropping equipment, in particular to a double-layer laser eavesdropping blocking film. Background Art

[0002] At present, laser monitoring technology is used to irradiate a laser beam onto the surface of the monitored object, such as glass, and then the sound information can be extracted by analyzing the reflected laser signal. Specifically, the laser generates an extremely fine infrared laser beam, which is irradiated onto the monitored object, such as a glass window or an object in the room that is prone to tiny vibrations. Talking in the room will cause the irradiated object to produce tiny vibrations, which will change the reflection characteristics of the laser, and the reflected laser will carry the information of these sound vibrations. Therefore, for some important institutions or office places, eavesdropping blocking films must be pasted on their window glass. The eavesdropping blocking films can change the reflection path or penetration path of light when light passes through, thereby destroying the normal return characteristics of the laser beam.

[0003] In view of the above, in the current technology, the use of laser blocking film still has certain defects. Specifically, the current law of destruction of the light path by this blocking film is still a static process. It guides the light in a direction deviating from the normal reflection path through its own material composition and physical properties such as uneven transparency, making it difficult for the light to be reflected along the normal return path. However, the light after deviation is still in a fixed reflection path, but it is not reflected to the receiving point. Therefore, as long as there is a technological breakthrough or the cooperation of multiple devices, the deviated part of the light beam can still be captured to a certain extent. Therefore, the current blocking method of this blocking film still has certain safety disadvantages, and therefore needs further improvement. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the following technical problems in the prior art: the current eavesdropping blocking film is a static process when performing blocking work, so that after the light reflection path is destroyed, it can still be reflected along a fixed direction, so it is easy to continue to be captured. In order to solve this technical problem, the utility model provides the following technical solutions:

[0006] A double-layer laser eavesdropping blocking film comprises a film body and an extruded part, wherein:

[0007] There are at least two extrusion members, which are built into the membrane body, and the two extrusion members are subject to cyclically changing suction and repulsion;

[0008] Liquid flow channels are arranged throughout the membrane body, are evenly distributed along the plane direction of the membrane body, and are located between the two extrusion members. The liquid flow channels are filled with translucent liquid.

[0009] As a preferred technical solution for a double-layer laser eavesdropping blocking film, the extruded part includes a coil which is arranged flat in the film body.

[0010] As a preferred technical solution for a double-layer laser eavesdropping blocking film, the coil is arranged in a transversely extending manner along the plane of the film, and the liquid flow channel is perpendicular to the extension direction of the coil.

[0011] As a preferred technical solution for a double-layer laser eavesdropping blocking film, the liquid flow channels are distributed at two locations along the thickness direction of the film body, and the two liquid flow channels are arranged at intervals and staggered in sequence.

[0012] As a preferred technical solution for a double-layer laser eavesdropping blocking film, the liquid flow channels have a linear cross-section and are arranged at intervals, and any two adjacent liquid flow channels intersect along the plane direction of the film body.

[0013] As an optimal technical solution for a double-layer laser eavesdropping blocking film, it also includes a power supply module, which is used to be arranged inside the window frame and connected to the coil.

[0014] The double-layer laser eavesdropping blocking film provided by the utility model has the following beneficial effects: compared with the blocking film in the prior art, the utility model cooperates with two extrusion parts inside the utility model, so as to cooperate with the flexibility of the film body itself to continuously squeeze and release the translucent liquid in the liquid flow channel, so that the translucent liquid continuously moves inside the film body, so that a dynamic interference with the transmitted light beam can be achieved, so that the light beam is reflected in a disorderly manner or without a fixed direction, and is difficult to be captured, so the blocking effect is better and the safety is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0016] Figure 1 It is a three-dimensional diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the arrangement of the coil inside the membrane body in the utility model.

[0018] Figure 3 It is a schematic diagram of the arrangement of the liquid flow channels in Example 1 of the present utility model.

[0019] Figure 4 For the utility model Figure 3 Cross-sectional perspective diagram.

[0020] Figure 5 It is a schematic diagram of the arrangement of the liquid flow channels in Example 2 of the present utility model.

[0021] Figure numerals: 1, membrane body; 2, extruded part; 201, coil; 3, liquid flow channel. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0026] Example 1

[0027] Reference Figure 1-4 , which is the first embodiment of the utility model, and provides a double-layer laser eavesdropping blocking film, which includes a film body 1 for light transmission, and also includes an extrusion member 2, Figure 2 The effect diagram of the membrane body 1 being cut in three dimensions is shown in FIG. Figure 2As shown, based on this, the utility model also has the following features:

[0028] The number of the extrusion members 2 is at least two, and they are arranged in the membrane body 1 in an embedded manner. The two extrusion members 2 are distributed in different layers inside the membrane body 1, and the two extrusion members 2 are subject to cyclically changing suction and repulsion.

[0029] The membrane body 1 is provided with liquid flow channels 3 throughout, and the liquid flow channels 3 are linearly extended, and the length thereof is close to the width of the membrane body 1. Multiple liquids are evenly distributed along the plane direction of the membrane body 1 and are located between the two extrusion members 2. The liquid flow channels 3 are filled with translucent liquids, and the translucent liquids may be various colored pigments, etc.;

[0030] Based on the above, when the utility model is used, the constantly changing attraction and repulsion formed between the two extrusion members 2, combined with the flexible characteristics of the membrane body 1 itself, the part of the membrane body 1 located at the extrusion member 2 will be constantly subjected to extrusion force and expansion force, thereby constantly squeezing and releasing the liquid flow channel 3, so that the internal translucent liquid is constantly moving in the entire membrane body 1, thereby affecting the light transmittance of the membrane body 1, so as to achieve the effect of continuously interfering with the transmitted light, thereby destroying the normal reflection law of the light, so that the reflected light is difficult to be directed to a fixed position, making it difficult to be captured;

[0031] According to the mutual force between the two extrusion members 2 and the continuous movement of the translucent liquid, the entire film body 1 can also vibrate microscopically, so that when the film body 1 is attached to the window glass, it can drive the glass to vibrate, thereby mixing with the vibration of the window glass caused by the indoor people talking, and the two vibration frequencies offset each other, thereby further destroying the vibration frequency generated by the indoor talking sound. Therefore, even if the laser is used to monitor the vibration of the window frame to obtain the sound source information, the process will still be blocked;

[0032] As described above, in addition to being able to destroy the normal reflection of light, the utility model can also destroy the normal vibration rate caused by speaking sound during operation, so it is safer than the blocking film in the current technology.

[0033] Further, see Figure 2The extrusion piece 2 includes a coil 201, which is arranged flat in the film body 1. When power is provided to the two coils 201, a magnetic field is formed in the two coils 201, so that they can attract and repel each other. As long as the current passing through one of the coils 201 is an alternating current, the direction of the magnetic field formed by it changes continuously, thereby ensuring that the repulsive and attractive forces between the two coils 201 are constantly changing. The structure of the coil 201 makes the force formation method simple and can be better arranged inside the film body 1. Regarding the power supply of the coil 201, when the entire blocking film is pasted on the window glass, the power supply is set on the window frame and connected to the coil 201.

[0034] Furthermore, Figure 3 The three-dimensional cutting of the membrane body 1 along the cross-sectional direction of the liquid flow channel 3 is shown in FIG. Figure 2-4 The coil 201 is arranged in a transversely extending manner along the plane direction of the membrane body 1, and the liquid flow channel 3 is perpendicular to the extension direction of the coil 201, so that the limited extension length of the coil 201 can fully cover multiple liquid flow channels 3 in the plane direction of the membrane body 1, so that all liquid flow channels 3 can fully play their role.

[0035] Further, see Figure 3 and Figure 4 Regarding the mutual distribution of multiple liquid flow channels 3, the liquid flow channels 3 are distributed in two different levels along the thickness direction of the membrane body 1, all the liquid flow channels 3 in each level are arranged at intervals, and all the liquid flow channels 3 in the two levels are staggered in sequence, so that the entire plane direction of the membrane body 1 can be covered by the translucent liquid.

[0036] Furthermore, to facilitate the power supply to the coil 201, the utility model also includes a power supply module. The power supply module can adopt a small battery block and a small inverter, which are directly arranged inside the window frame and connected to the coil 201 through a wire, so as to provide AC power and DC power to the two coils 201 respectively, so as to ensure that the magnetic field formed by at least one coil 201 is a converted magnetic field. By arranging the battery block and the inverter in the window frame, the effect of hidden power supply can be achieved.

[0037] Example 2

[0038] This embodiment provides another arrangement of the liquid flow channel 3. Figure 5 is a schematic diagram of a three-dimensional cut of the membrane body 1 along the cross-sectional direction of the liquid flow channel 3, referring to Figure 5The cross-section of the liquid flow channel 3 is a linear structure and is arranged at intervals, and any two adjacent liquid flow channels 3 intersect along the plane direction of the membrane body 1, thereby achieving an effect of fully covering the entire membrane body 1 in the plane direction of the membrane body 1. Compared with the distribution method in Example 1, in the distribution method of this embodiment, the number of liquid flow channels 3 to be constructed is smaller, so the production of the membrane body 1 is simpler.

[0039] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A double-layer laser eavesdropping blocking film, characterized in that: It comprises a membrane body (1) and an extruded part (2), wherein: The number of the extrusion members (2) is at least two and they are built into the membrane body (1), and the two extrusion members (2) are subject to cyclically changing suction and repulsion; The membrane body (1) is provided with liquid flow channels (3) throughout the membrane body (1), which are evenly distributed along the plane direction of the membrane body (1) and are located between the two extrusion members (2). The liquid flow channels (3) are filled with translucent liquid.

2. The double-layer laser eavesdropping blocking film according to claim 1, characterized in that: The extrusion member (2) comprises a coil (201) which is arranged in a flat manner inside the membrane body (1).

3. The double-layer laser eavesdropping blocking film according to claim 2 is characterized in that: The coil (201) is arranged in a transversely extending manner along the plane direction of the membrane body (1), and the liquid flow channel (3) is perpendicular to the extension direction of the coil (201).

4. The double-layer laser eavesdropping blocking film according to claim 3 is characterized in that: The liquid flow channels (3) are distributed at two locations along the thickness direction of the membrane body (1), and the two liquid flow channels (3) are arranged at intervals and staggered in sequence.

5. The double-layer laser eavesdropping blocking film according to claim 3 is characterized in that: The cross section of the liquid flow channels (3) is a linear structure and is arranged at intervals, and any two adjacent liquid flow channels (3) intersect along the plane direction of the membrane body (1).

6. The double-layer laser eavesdropping blocking film according to claim 2, characterized in that: It also includes a power supply module, which is used to be arranged inside the window frame and connected to the coil (201).

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