Glass integrity monitoring device

Abstract

The utility model discloses a glass integrity monitoring device which mainly provides detection light for glass through a light emitting module, the detection light is totally reflected in the glass, a light receiving module receives feedback light transmitted by the glass, and when the glass is damaged, a total reflection environment changes and a feedback signal changes, so that the state of the glass is monitored. According to the main technical scheme, the glass integrity monitoring device comprises a light emitting module and a light receiving module, the light emitting module and the light receiving module are both used for being connected with glass, the light emitting module is used for providing detection light totally reflected in the glass for the glass, and the light receiving module is used for receiving feedback light generated after the detection light is transmitted through the glass; and a feedback signal is generated according to the feedback light. The device is mainly used for glass detection.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a glass integrity monitoring device. Background Art

[0002] At present, with the gradual popularization of domestic automobiles, electric and hybrid passenger cars, the demand for intelligent sensing devices on vehicles is getting higher and higher. Among them, sensors used in the field of driving safety have received widespread attention.

[0003] The windshield is an important part of an automobile, occupying a large area of the vehicle's outer surface. It is easily hit by foreign objects and is prone to breakage when itself is impacted, seriously endangering the safety of the driver. Therefore, the windshield has become an important component that needs to be monitored on the vehicle. In the prior art, there is a patch-type resistance wire sensor, which has a large coverage area and will affect the vision when used on the vehicle windshield. There is also an acoustic wave detection glass break detector in the prior art, but it is usually used for indoor glass detection and cannot be applied to the vehicle interior environment.

[0004] Therefore, how to perform real-time monitoring of the breakage of the automobile windshield has become an urgent problem to be solved. Summary of the Utility Model

[0005] In view of this, to solve the above-mentioned at least one technical problem, an embodiment of the utility model provides a glass integrity monitoring device.

[0006] To achieve the above object, the utility model mainly provides the following technical solutions:

[0007] An embodiment of the utility model provides a glass integrity monitoring device, including:

[0008] A light-emitting module (100) and a light-receiving module (200). Both the light-emitting module (100) and the light-receiving module (200) are used to connect to a glass (300). The light-emitting module (100) is used to provide detection light that undergoes total internal reflection in the glass (300) to the glass (300), and the light-receiving module (200) is used to receive the feedback light after the detection light propagates through the glass (300) and generate a feedback signal according to the feedback light.

[0009] Among them, the light-emitting module (100) includes a first housing (110), a light-emitting component (120), a light-emitting shaping lens (130), and a light-emitting coupling member (140). The first housing (110) includes a first accommodation space and a first opening. Both the light-emitting component (120) and the light-emitting shaping lens (130) are located in the first accommodation space. The light-emitting coupling member (140) covers the first opening. The light-emitting shaping lens (130) is located between the light-emitting coupling member (140) and the light-emitting component (120), and the light-emitting shaping lens (130) is connected to the light-emitting coupling member (140). The light-emitting coupling member (140) is used to connect with the glass (300). After the light of the light-emitting component (120) passes through the light-emitting shaping lens (130) and the light-emitting coupling member (140), a detection light is formed.

[0010] The light-receiving module (200), the light-emitting module (200) includes a second housing (210), a light-receiving component (220), a light-receiving shaping lens (230), and a light-receiving coupling member (240). The second housing (210) includes a second accommodation space and a second opening. Both the light-receiving component (220) and the light-receiving shaping lens (230) are located in the second accommodation space. The light-receiving coupling member (240) covers the second opening. The light-receiving shaping lens (230) is located between the light-receiving coupling member (240) and the light-receiving component (220), and the light-receiving shaping lens (230) is connected to the light-receiving coupling member (240). The light-receiving coupling member (240) is used to connect with the glass (300). After the feedback light passes through the light-receiving coupling member (240) and the light-receiving shaping lens (230), it is projected onto the light-receiving component (220) to generate a feedback signal.

[0011] Among them, the light-emitting coupling member (140) includes a first contact surface, and the first contact surface is used to connect with the glass (300). The included angle between the central light ray of the light emitted by the light-emitting component (120) and / or the optical axis of the light-emitting shaping lens (130) and the first contact surface is not greater than 45°.

[0012] The light-receiving coupling member (240) includes a second contact surface, and the second contact surface is used to connect with the glass (300). The included angle between the optical axis of the light-receiving shaping lens (230) and the second contact surface is not greater than 45°.

[0013] Among them, the light-emitting component (120) includes a first circuit board (121) and a light-emitting diode (122). The light-emitting diode (122) is mechanically and electrically connected to the first circuit board (121), and the first circuit board (121) is connected to the first housing (110).

[0014] The light-emitting diode (122) is used to emit infrared light.

[0015] Among them, the light-receiving component (220) includes a second circuit board (221) and a photodetector (222). The photodetector (222) is mechanically and electrically connected to the second circuit board (221), and the second circuit board (221) is connected to the second housing (210).

[0016] The photodetector (222) includes a photodiode.

[0017] Among them, the material of the light-emitting coupler (140) and / or the light-receiving coupler (240) is silicone.

[0018] Among them, the light-emitting module (100) further includes a first optical baffle (150). The light-emitting coupler (140) at least covers the end face of the light-emitting shaping lens (130) away from the light-emitting component (120), and the first optical baffle (150) and the light-emitting coupler (140) cooperate to cover the first opening.

[0019] The light-receiving module (200) further includes a second optical baffle (250). The light-receiving coupler (240) at least covers the end face of the light-receiving shaping lens (230) away from the light-receiving component (220), and the second optical baffle (250) and the light-receiving coupler (240) cooperate to cover the second opening.

[0020] Among them, the light-emitting coupler (140) at least covers the first opening.

[0021] The light-receiving coupler (240) at least covers the second opening

[0022] Among them, the light-emitting shaping lens (130) includes a first incident surface and a first exit surface. The first incident surface faces the light-emitting component (120), the first incident surface is an arc surface protruding towards the light-emitting component (120), and the first exit surface is a plane.

[0023] The light-receiving shaping lens (230) includes a second incident surface and a second exit surface. The second incident surface is connected to the light-receiving coupler (240), the second incident surface is a plane, and the second exit surface is an arc surface protruding towards the light-receiving component (220).

[0024] Among them, the refractive index of the light-emitting shaping lens (130) and / or the light-receiving shaping lens (230) is 1.4 to 1.7.

[0025] A glass integrity monitoring device proposed in an embodiment of the present utility model mainly provides detection light to the glass through a light-emitting module. The detection light undergoes total internal reflection in the glass, and a light-receiving module receives the feedback light after the light propagates through the glass. When the glass is damaged, the total internal reflection environment of the glass will change, and then the feedback signal will change, realizing the monitoring of the glass state. This glass integrity monitoring device can be applied to various types of vehicles, such as the detection of bullet train glass and freight train glass, and can detect the front windshield glass, roof window glass, etc. It can also be used in indoor building glass, unmanned factories, laboratories, and other places where the integrity of the glass needs to be monitored. It has a wider scope of application, is fast, accurate, miniaturized, and low-cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. is a schematic structural diagram of a light-emitting module in a glass integrity monitoring device provided by an embodiment of the present utility model;

[0027] Figure 2 FIG. is a partial structural diagram of a light-emitting module in a glass integrity monitoring device provided by an embodiment of the present utility model;

[0028] Figure 3 FIG. is a schematic structural diagram of a light-receiving module in a glass integrity monitoring device provided by an embodiment of the present utility model;

[0029] Figure 4 FIG. is a partial structural diagram of a light-receiving module in a glass integrity monitoring device provided by an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific embodiments, structures, features, and effects of a glass integrity monitoring device proposed according to the present utility model as follows.

[0031] On the one hand, as Figures 1-4 shown, an embodiment of the present utility model provides a glass integrity monitoring device, including:

[0032] A light-emitting module (100) and a light-receiving module (200). Both the light-emitting module (100) and the light-receiving module (200) are used to connect to the glass (300). The light-emitting module (100) is used to provide detection light that undergoes total internal reflection in the glass (300) to the glass (300), and the light-receiving module (200) is used to receive the feedback light after the detection light propagates through the glass (300) and generate a feedback signal according to the feedback light.

[0033] The light-emitting module (100) and the light-receiving module (200) can be fixed on the glass (300) in various ways. For example, they can be pasted on the glass (300) through their own components. Or, they can be fixed with the help of additional structures. For example, the light-emitting module (100) and the light-receiving module (200) can be pasted on the glass (300) using glass glue. Or, the light-emitting module (100) and the light-receiving module (200) can be fixed on the frame of the glass (300) with bolts or the like, which can be set according to needs and are not limited in this application. The light-emitting module (100) and the light-receiving module (200) are arranged at intervals on the same piece of glass (300). The interval between the light-emitting module (100) and the light-receiving module (200) should ensure that the area to be detected is spanned. For example, the light-emitting module (100) and the light-receiving module (200) can be respectively arranged at the diagonals of the front windshield (300), such as at the upper left corner and the lower right corner, aiming to monitor the glass (300) in a larger range. In some embodiments, multiple pairs of light-emitting modules (100) and light-receiving modules (200) can be set on the same piece of glass (300). The light-emitting module (100) and the light-receiving module (200) are arranged on the inner side of the glass (300). Or when applied to an automobile, the light-emitting module (100) and the light-receiving module (200) are located inside the automobile, thereby avoiding interference from the external environment to the light-emitting module (100) and the light-receiving module (200), such as avoiding erosion by rain, sand and dust, and ensuring the reliability of the light-emitting module (100) and the light-receiving module (200).

[0034] The light-emitting module (100) is used to provide detection light. The installation angle of the light-emitting module (100) is such that the angle of the detection light satisfies the condition that it can enter the glass (300) and can undergo total internal reflection in the glass (300). The installation of the light-receiving module (200) should meet the requirement that it can receive the feedback light after the detection light propagates through the glass (300). When the glass (300) is damaged due to instantaneous accidents or other reasons, such as when an external object hits the front windshield (300) and causes the front windshield (300) to break, the total internal reflection propagation condition of the detection light is broken, and the detection light cannot converge on the light-receiving module (200) along the original path, resulting in a change in the feedback light. For example, the feedback light may disappear or weaken, thereby causing a change in the light received by the light-receiving module (200). The light-receiving module (200) generates different feedback signals according to the presence or absence or intensity of the received light, and then can give an alarm or indicate the next action.

[0035] The light-emitting module (100) and the light-receiving module (200) can both be connected to a control device in the usage environment, which can be a wired connection or a wireless connection. For example, in the scenario where the light-emitting module (100) and the light-receiving module (200) are applied to an automobile, the light-emitting module (100) and the light-receiving module (200) can be connected to the vehicle's controller through a wired socket or wirelessly, and then the activation of the light-emitting module (100) and the light-receiving module (200) can be controlled, and the controller can perform subsequent controls such as vehicle emergency avoidance based on the feedback signal.

[0036] In some usage scenarios, such as in sparsely populated sections of the road, if an object dropped by a vehicle in front breaks the rear windshield (300) of a following vehicle, thereby causing the driver to be injured and unconscious, at this time, the glass integrity monitoring device can detect the degree of breakage of the glass (300), and then automatically judge to cut off the fuel supply and the circuit, and connect to the network for automatic alarm and other remedial measures, increasing the survival rate of the injured and reducing losses. During high-speed driving, if the windshield (300) is accidentally damaged, the glass integrity monitoring device can instantaneously evaluate the damage condition of the glass (300) and take rapid passive measures such as reclining the driver's seat according to the situation, reducing the possibility of injury.

[0037] A glass integrity monitoring device proposed in an embodiment of the present utility model mainly provides detection light to the glass through a light-emitting module. The detection light undergoes total internal reflection in the glass, and the light-receiving module receives the feedback light after propagation through the glass. When the glass is damaged, the total internal reflection environment of the glass will change, and then the feedback signal will change, realizing the monitoring of the glass state. This glass integrity monitoring device can be applied to various types of vehicles, such as the detection of bullet train glass and freight train glass, and can detect the front windshield, roof window glass, etc. It can also be used in indoor building glass, unmanned factories, laboratories and other usage places that require monitoring of glass integrity, with advantages such as not blocking the line of sight, small volume, fast detection speed, and low cost, having a wider application range, being fast and accurate. This application is used for remedial measures after an accident, which can effectively reduce the casualties caused by instantaneous accidents and can also effectively reduce secondary injuries caused by rescue delays after an accident. This application is not affected by rain and light in the detection of glass integrity, which will be further described in detail later.

[0038] In one embodiment, the light-emitting module (100) includes a first housing (110), a light-emitting component (120), a light-emitting shaping lens (130), and a light-emitting coupler (140). The first housing (110) includes a first accommodation space and a first opening. Both the light-emitting component (120) and the light-emitting shaping lens (130) are located in the first accommodation space. The light-emitting coupler (140) covers the first opening. The light-emitting shaping lens (130) is located between the light-emitting coupler (140) and the light-emitting component (120), and the light-emitting shaping lens (130) is connected to the light-emitting coupler (140). The light-emitting coupler (140) is used to connect to the glass (300). After the light of the light-emitting component (120) passes through the light-emitting shaping lens (130) and the light-emitting coupler (140), a detection light is formed. The light-receiving module (200), the light-emitting module (200) includes a second housing (210), a light-receiving component (220), a light-receiving shaping lens (230), and a light-receiving coupler (240). The second housing (210) includes a second accommodation space and a second opening. Both the light-receiving component (220) and the light-receiving shaping lens (230) are located in the second accommodation space. The light-receiving coupler (240) covers the second opening. The light-receiving shaping lens (230) is located between the light-receiving coupler (240) and the light-receiving component (220), and the light-receiving shaping lens (230) is connected to the light-receiving coupler (240). The light-receiving coupler (240) is used to connect to the glass (300). After the feedback light passes through the light-receiving coupler (240) and the light-receiving shaping lens (230), it is projected onto the light-receiving component (220) to generate a feedback signal.

[0039] The shapes of the first housing (110) and the second housing (210) can be the same, which is convenient for processing. Or, the shapes of the first housing (110) and the second housing (210) can also be differentially designed according to needs. In this embodiment, the first housing (110) and the second housing (210) can be approximately cylindrical. The shapes of the first housing (110) and the second housing (210) should ensure a light-tight environment for the light-emitting component (120) and the light-receiving component (220), that is, the first housing (110) and the second housing (210) need to be made of light-impermeable materials, such as light-impermeable ABS or PC materials. The light-emitting component (120) can be located on one side of the first accommodation space away from the first opening, and the light-receiving component (220) is located on one side of the second accommodation space away from the second opening. The light-emitting coupler (140) can be located inside the first accommodation space, that is, the surface of the light-emitting coupler (140) away from the light-emitting component (120) and the first opening are in the same plane. Or, the light-emitting coupler (140) can also be located outside the first accommodation space, that is, the surface of the light-emitting coupler (140) close to the light-emitting component (120) and the first opening are in the same plane. The position of the light-receiving coupler (240) relative to the second accommodation space can refer to the light-emitting coupler (140), and will not be elaborated here.

[0040] In one implementation, the light-emitting coupling member (140) includes a first contact surface for connecting to the glass (300). The included angle between the central ray of the light emitted by the light-emitting component (120) and / or the optical axis of the light-shaping lens (130) and the first contact surface is not greater than 45°. The light-receiving coupling member (240) includes a second contact surface for connecting to the glass (300). The included angle between the optical axis of the light-receiving shaping lens (230) and the second contact surface is not greater than 45°.

[0041] The light-emitting coupling member (140) is surface-attached to the surface of the glass (300) through the first contact surface. The included angle between the central ray of the light emitted by the light-emitting component (120) and / or the optical axis of the light-shaping lens (130) and the first contact surface not being greater than 45° can be interpreted as the included angle between the light propagation angle of the light-emitting component (120) and the normal line of the glass (300) at the incident point of the detection light on the glass (300) being greater than or equal to 45°, or the included angle between the propagation angle of the central ray of the light-emitting component (120) and the normal line of the glass (300) at the incident point of the detection light on the glass (300) being greater than or equal to 45°, or the included angle between the optical axis of the light-shaping lens (130) and the normal line of the glass (300) at the incident point of the detection light on the glass (300) being greater than or equal to 45°. Since the critical angle of the glass (300) is between 30° and 42°, it is ensured that the detection light can undergo total internal reflection in the glass (300) until it enters the light-receiving coupling member (240). The light-receiving coupling member (240) is surface-attached to the surface of the glass (300) through the second contact surface. The included angle between the optical axis of the light-receiving shaping lens (230) and the second contact surface is not greater than 45°, thus enabling the reception of the light propagated by the glass (300). In some implementations, the optical axis of the light-receiving shaping lens (230) needs to be aligned with the direction of the light after passing through the light-receiving coupling member (240). The setting of the angular range of the light-emitting module (100) increases the installation tolerance of the light-receiving module (200) and has a relatively large effective detection range.

[0042] The light-emitting coupling component (140) is used to ensure that light can smoothly enter the glass (300) from the light-emitting shaping lens (130) without total reflection occurring between the light-emitting shaping lens (130) and the glass (300). Or rather, the light-emitting coupling component (140) is used to prevent an air layer from appearing between the light-emitting shaping lens (130) and the glass (300). The light-emitting coupling component (140) should have a refractive index similar to that of the light-emitting shaping lens (130) and the glass (300). The material of the light-emitting coupling component (140) has the characteristics of light transmittance and viscosity. For example, the material of the light-emitting coupling component (140) can be silicone. Silicone has adhesion and a certain degree of deformability, and thus can be applicable to various glass (300) surface profiles, and makes the connection between the light-emitting module (100) and the glass (300) more stable, avoiding the presence of air in the middle. The light-emitting coupling component (140) includes a first contact surface, which is used to connect with the glass (300). The first contact surface can be only a flat surface, or it can be consistent with the surface profile of the glass (300), such as an arc surface. The angle between the central light ray of the light emitted by the aforementioned light-emitting component (120) and / or the optical axis of the light-emitting shaping lens (130) and the first contact surface is not greater than 45°, which means the angle between the central light ray of the light emitted by the light-emitting component (120) and / or the optical axis of the light-emitting shaping lens (130) and the projection point of the light on the first contact surface is not greater than 45°.

[0043] The light-receiving coupling component (240) is used to ensure that light can smoothly enter the light-receiving shaping lens (230) from the glass (300) without total reflection occurring between the glass (300) and the light-receiving shaping lens (230). Or rather, the light-receiving coupling component (240) is used to prevent an air layer from appearing between the glass (300) and the light-receiving shaping lens (230). The light-receiving coupling component (240) should have a refractive index similar to that of the light-receiving shaping lens (230) and the glass (300). The material of the light-receiving coupling component (240) has the characteristics of light transmittance and viscosity. For example, the material of the light-receiving coupling component (240) can be silicone. Silicone has adhesion and a certain degree of deformability, and thus can be applicable to various glass (300) surface profiles, and makes the connection between the light-receiving module (200) and the glass (300) more stable, avoiding the presence of air in the middle. The light-receiving coupling component (240) includes a second contact surface, which is used to connect with the glass (300). The second contact surface can be only a flat surface, or it can be consistent with the surface profile of the glass (300), such as an arc surface. The angle between the optical axis of the aforementioned light-receiving shaping lens (230) and the second contact surface is not greater than 45°, which means the angle between the optical axis of the light-receiving shaping lens (230) and the projection point of the light on the second contact surface is not greater than 45°.

[0044] The light-emitting shaping lens (130) is used to collimate the light emitted by the light-emitting component (120), so that the beam-shaped light becomes straight light, that is, the detection light, after passing through the light-emitting shaping lens (130), and then the light is propagated along the preset path. In a more specific embodiment, the light-emitting component (120) includes a first circuit board (121) and a light-emitting diode (122). The light-emitting diode (122) is mechanically and electrically connected to the first circuit board (121), and the first circuit board (121) is connected to the first housing (110).

[0045] The light-emitting diode (122) is used to emit infrared light, and the light emitted by the light-emitting diode (122) will propagate in an approximately conical beam shape, and then be collimated by the light-emitting shaping lens (130). The first circuit board (121) can be a PCB board, and peripheral circuits for power supply and on-off control of the light-emitting diode (122) are provided on the first circuit board (121). The first circuit board (121) can be fixed to the first housing (110) by bolts or welding, etc. The first circuit board (121) can be connected to the controller and power supply in the use environment by wired or wireless connection methods.

[0046] Furthermore, the light-emitting shaping lens (130) can be of various shapes, aiming to make the light parallel after refraction through the light-emitting shaping lens (130). For example, in one embodiment, the light-emitting shaping lens (130) includes a first incident surface and a first exit surface. The first incident surface faces the light-emitting component (120), and the first incident surface is an arc surface protruding towards the light-emitting component (120). The first incident surface is spaced from the light-emitting component (120), and the size of the spacing can be determined according to the cross-sectional range of the required light. The first exit surface is a plane, and the first exit surface is used to be surface-fitted with the light-emitting coupling component (140). In one embodiment, the first exit surface extends to be in the same plane as the first opening, and then the light-emitting coupling component (140) can be surface-fitted with the first exit surface at the opening position. After the light is projected onto the first incident surface, it will be refracted to different degrees under the action of the arc surface. For example, the light closer to the edge of the light beam has a greater degree of refraction, and then the light becomes parallel light or most of the light becomes parallel light and propagates.

[0047] The light-receiving shaping lens (230) is used to converge the parallel light, that is, the feedback light, propagated by the glass (300), so that the parallel light passes through the light-receiving shaping lens (230) and converges to the light-receiving component (220), and then the light-receiving component (220) can receive the light. In a more specific embodiment, the light-receiving component (220) includes a second circuit board (221) and a photodetector (222). The photodetector (222) is mechanically and electrically connected to the second circuit board (221), and the second circuit board (221) is connected to the second housing (210).

[0048] The light detector (222) includes a photodiode (light receiving PD). Parallel light rays propagating through the glass (300) converge through the light receiving shaping lens (230) and are then projected toward the light detector (222). The light detector (222) is a photoelectric information conversion circuit that can convert the received optical signal power into an electric signal current, and then the current magnitude can be used as a feedback signal. The second circuit board (221) can be a PCB board, and the second circuit board (221) is provided with a peripheral circuit for powering the light detector (222) and generating a signal, such as including an amplification circuit, which can amplify the electric signal, thereby making the feedback more sensitive, and even small changes in light intensity can be accurately captured. The second circuit board (221) can be fixed to the second housing (210) by bolts or welding. The second circuit board (221) can be connected to a controller and a power supply in the use environment by wired or wireless connection. In the present application, when the glass (300) is intact, the acceptable light flux on the surface of the light receiving component (220) or the light receiving chip is the largest. As the degree of breakage of the glass (300) gradually increases, the light flux that can be received by the light receiving component (220) or the surface of the light receiving chip gradually decreases, thereby being able to detect glass (300) with different degrees of breakage.

[0049] The light-receiving shaping lens (230) can be in a variety of shapes, so that parallel light rays can converge to the light detector (222) after being refracted by the light-receiving shaping lens (230). In one embodiment, the light-receiving shaping lens (230) includes a second incident surface and a second exit surface, the second incident surface is opposite to the light-receiving coupling element (240), the second incident surface is a plane, and the second incident surface is used to fit the surface of the light-receiving coupling element (240). In one embodiment, the second incident surface extends to be in the same plane as the second opening, and then the light-receiving coupling element (240) fits the second incident surface from the opening position. The second exit surface is an arc-shaped surface protruding toward the light-receiving component (220). The second exit surface is spaced apart from the light-receiving component (220), and the size of the space is such that the light-receiving component (220) can be at the light convergence point. After being projected onto the second incident surface, the light will continue to propagate toward the second exit surface, and then be refracted to varying degrees under the action of the curved surface of the second exit surface. For example, the closer the light is to the edge, the greater the degree of refraction, and then the light converges and propagates toward the light receiving component (220).

[0050] The above-mentioned light-emitting shaping lens (130) and light-receiving shaping lens (230) can be made of high-transparency polycarbonate (PC), which has sufficient hardness and low cost, thus reducing the production cost. During preparation, special color powder can be doped as needed, so that the light-emitting shaping lens (130) and the light-receiving shaping lens (230) only transmit the target wavelength, such as only transmitting light with λ = 0.8 - 1.0 μm, which can reduce the interference of external light. In addition, polymethyl methacrylate (PMMA) or other optical plastics can also be selected.

[0051] In one embodiment, the refractive index of the light-emitting shaping lens (130) and / or the light-receiving shaping lens (230) is 1.4 to 1.7, so that the refractive index of the light-emitting shaping lens (130) and / or the light-receiving shaping lens (230) is close to the refractive index of the glass (300) (about 1.5). Consequently, the refraction angle of the light during transmission between the light-emitting shaping lens (130) and the glass (300), and / or between the light-receiving shaping lens (230) and the glass (300) is very small or basically in a straight-line propagation.

[0052] In one embodiment, the light-emitting module (100) further includes a first optical baffle (150). The light-emitting coupler (140) covers at least the end face of the light-emitting shaping lens (130) away from the light-emitting component (120), such as only covering and completely covering the plane of the first exit surface of the light-emitting shaping lens (130) away from the light-emitting component (120). The remaining positions of the first opening are covered by the first optical baffle (150), and the first optical baffle (150) and the light-emitting coupler (140) cooperate to cover the first opening. Similarly, the light-receiving module (200) further includes a second optical baffle (250). The light-receiving coupler (240) covers at least the end face of the light-receiving shaping lens (230) away from the light-receiving component (220), such as only covering and completely covering the plane of the second incident surface of the light-receiving shaping lens (230) away from the light-receiving component (220). The remaining positions of the second opening are covered by the second optical baffle (250), and the second optical baffle (250) and the light-receiving coupler (240) cooperate to cover the second opening. The first optical baffle (150) and the second optical baffle (250) are also made of light-impermeable materials, such as light-impermeable ABS or PC materials. The first optical baffle (150) and the second optical baffle (250) can be integrally formed with the first housing (110) and the second housing (210) respectively, serving the purpose of reducing the usage amount of the light-emitting coupler (140) and the light-receiving coupler (240), and reducing the production cost, replacement cost and processing difficulty.

[0053] In another embodiment, the light-emitting coupling member (140) may at least cover the first opening, and the light-receiving coupling member (240) may at least cover the second opening, thereby making the structures of the first housing (110) and the second housing (210) simple and facilitating processing. In addition, the light-emitting coupling member (140) and the light-receiving coupling member (240) are detachably connected to the first housing (110) and the second housing (210) respectively, and can be replaced in case of deformation, damage, pollution, etc. after long-term use.

[0054] It is worth noting that the sensing detection of the present application is not interfered by light and rain. The first housing (110) and the second housing (210), as well as the first optical baffle (150) and the second optical baffle (250) play a role in isolating light and can effectively isolate stray light. In addition, due to the angle design of the optical structure of this product, the outdoor sunlight cannot enter the light-receiving module (200) from the silica gel layer or the light-receiving coupling member (240). When there is a water layer (400) on the glass (300), such as when it rains and there is water on the vehicle front windshield (300), after the detection light enters the glass (300), it does not refract into the water layer (400), so that during the sensing detection, the interference effect of rain on the detection of the fragmentation of the vehicle glass (300) can be excluded. The light efficiency can be defined as the light flux received by the light-emitting diode divided by the total emitted light flux. Experiments have shown that in a water-free environment, the light efficiency value of the light-receiving module (200) is 0.153%, and in a water-containing environment, the light efficiency value of the light-receiving module (200) is 0.150%. By comparing the two, it can be concluded that theoretically the external rainfall does not cause sensing interference to the present application.

[0055] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. A glass integrity monitoring device, characterized in that: include: A light emitting module (100) and a light receiving module (200), wherein the light emitting module (100) and the light receiving module (200) are both used to connect the glass (300); The light emitting module (100) is used to provide the glass (300) with detection light that is totally reflected in the glass (300); The light receiving module (200) is used to receive feedback light after the detection light is transmitted through the glass (300), and to generate a feedback signal according to the feedback light.

2. The glass integrity monitoring device according to claim 1, characterized in that: The light emitting module (100) comprises a first housing (110), a light emitting component (120), a light shaping lens (130) and a light emitting coupling component (140); the first housing (110) comprises a first accommodating space and a first opening; the light emitting component (120) and the light shaping lens (130) are both located in the first accommodating space; the light emitting coupling component (140) covers the first opening; the light shaping lens (130) is located between the light emitting coupling component (140) and the light emitting component (120); the light shaping lens (130) is connected to the light emitting coupling component (140); the light emitting coupling component (140) is used to connect to the glass (300); the light of the light emitting component (120) passes through the light shaping lens (130) and the light emitting coupling component (140) to form the detection light; The light emitting module (200) comprises a second housing (210), a light receiving component (220), a light shaping lens (230) and a light receiving coupling element (240); the second housing (210) comprises a second accommodating space and a second opening; the light receiving component (220) and the light shaping lens (230) are both located in the second accommodating space; the light receiving coupling element (240) covers the second opening; the light shaping lens (230) is located between the light receiving coupling element (240) and the light receiving component (220); the light shaping lens (230) is connected to the light receiving coupling element (240); the light receiving coupling element (240) is used to be connected to the glass (300); the feedback light passes through the light receiving coupling element (240) and the light shaping lens (230) and is projected onto the light receiving component (220) to generate the feedback signal.

3. The glass integrity monitoring device according to claim 2, characterized in that: The light-emitting coupling element (140) comprises a first surface, the first surface being used to connect to the glass (300), and the angle between the central light ray emitted by the light-emitting component (120) and / or the optical axis of the light-emitting shaping lens (130) and the first surface is no greater than 45°; The light receiving coupling element (240) comprises a second surface, the second surface is used to be connected to the glass (300), and the angle between the optical axis of the light receiving shaping lens (230) and the second surface is no greater than 45°.

4. The glass integrity monitoring device according to claim 2, characterized in that: The light-emitting component (120) comprises a first circuit board (121) and a light-emitting diode (122), wherein the light-emitting diode (122) is mechanically and electrically connected to the first circuit board (121), and the first circuit board (121) is connected to the first housing (110); The light emitting diode (122) is used for emitting infrared light.

5. The glass integrity monitoring device according to claim 2, characterized in that: The light receiving component (220) comprises a second circuit board (221) and a light detector (222), the light detector (222) is mechanically and electrically connected to the second circuit board (221), and the second circuit board (221) is connected to the second housing (210); The light detector (222) includes a photodiode.

6. The glass integrity monitoring device according to claim 2, characterized in that: The light-emitting coupling component (140) and / or the light-receiving coupling component (240) are made of silicone.

7. The glass integrity monitoring device according to claim 2, characterized in that: Said The light-emitting module (100) further comprises a first optical baffle (150), the light-emitting coupling member (140) at least covers the end surface of the light-emitting shaping lens (130) away from the light-emitting component (120), and the first optical baffle (150) cooperates with the light-emitting coupling member (140) to cover the first opening; The light receiving module (200) further comprises a second optical baffle (250), the light receiving coupling member (240) at least covers the end face of the light receiving shaping lens (230) away from the light receiving component (220), and the second optical baffle (250) cooperates with the light receiving coupling member (240) to cover the second opening.

8. The glass integrity monitoring device according to claim 2, characterized in that: The light-emitting coupling element (140) at least covers the first opening; The light receiving coupling element (240) at least covers the second opening.

9. The glass integrity monitoring device according to claim 2, characterized in that: The light-emitting shaping lens (130) comprises a first incident surface and a first exit surface, the first incident surface is opposite to the light-emitting component (120), the first incident surface is an arc-shaped surface protruding toward the light-emitting component (120), and the first exit surface is a plane; The light-receiving shaping lens (230) comprises a second incident surface and a second exit surface, the second incident surface is connected to the light-receiving coupling element (240), the second incident surface is a plane, and the second exit surface is an arc-shaped surface protruding toward the light-receiving component (220).

10. The glass integrity monitoring device according to claim 2, characterized in that: The refractive index of the light-emitting shaping lens (130) and / or the light-receiving shaping lens (230) is 1.4 to 1.7.

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