Demodulator for sensing monitoring and monitoring device

Abstract

The utility model provides a demodulator for sensing and monitoring and a monitoring device, and relates to the technical field of optical temperature measurement, the demodulator for sensing and monitoring comprises a shell, a circuit board, a filter disc, a luminous body, a photoelectric detection module, an optical fiber connector and a cover plate, the shell is internally provided with a light-passing through hole and a jack penetrating to the light-passing through hole, the filter disc is inserted into the jack, and the luminous body is inserted into the light-passing through hole. The cover plate is arranged in the shell and covers the jack, the circuit board is arranged in the shell, the luminous body is electrically connected to the circuit board and emits detection light to the light filtering part, the optical fiber connector is arranged at one end of the light through hole, and the photoelectric detection module is arranged at the other end of the light through hole. By additionally designing the cover plate, external dust or impurities can be prevented from entering the shell, the permeability of an optical path and the cleanliness of the filter disc are ensured, on the other hand, the filter disc can be stopped, the filter disc is prevented from being separated from the mounting slot to influence the filtering effect, and the filter is simple in structure, convenient to assemble and not easy to damage.

Description

Technical Field

[0001] The utility model relates to the technical field of optical temperature measurement, in particular to a demodulator and a monitoring device for sensing monitoring. Background Art

[0002] There are many types of monitoring technologies for sensor monitoring demodulators. Among them, fluorescence temperature measurement technology is a technology that measures temperature based on the luminescence characteristics of fluorescent substances. Its basic principle is to determine its temperature by measuring the emission spectrum of fluorescent substances. The optical demodulation module is a device used to demodulate optical signals. It can obtain the required information by analyzing and processing optical signals.

[0003] In the related technology, a typical solution is to use a single-channel optical demodulation module, which transmits the optical signal through an optical fiber to one end of the measured optical fiber through an emitting light source, and then uses the phosphor to reflect part of the optical signal back, and receives the optical signal of a specific band through an amplifier and a filter, and finally detects the temperature of the optical fiber end by demodulating the optical signal. The advantage of this method is that it can realize the temperature measurement of a single temperature point, with high measurement accuracy and stability.

[0004] However, in the related art, the filter needs to be installed after a hole is opened on the shell of the sensor monitoring demodulator. After installation, no additional protective structure is usually set, which causes external dust and impurities to easily enter the interior through the hole, affecting the permeability of the optical path and the cleanliness of the filter. In addition, the filter has a poor fixing effect and is prone to loosening, affecting its temperature measurement effect. Utility Model Content

[0005] The purpose of the utility model is to provide a demodulator and monitoring device for sensing monitoring, which can provide good protection for the filter, reduce external dust or impurities from entering the interior, ensure the permeability of the optical path and the cleanliness of the filter, and at the same time can limit the filter to reduce the influence of looseness on temperature measurement. The structure is simple, the assembly is convenient, and it is not easy to damage.

[0006] The embodiment of the utility model is achieved as follows:

[0007] In one aspect, the utility model provides a demodulator for sensing monitoring, comprising:

[0008] The housing is provided with a light-through hole and a plug hole extending in the radial direction of the light-through hole and penetrating the light-through hole;

[0009] A filter, plugged into the jack, the filter comprising a light filtering portion passing through the light-transmitting through hole;

[0010] A cover plate, disposed on the housing and covering the jack;

[0011] A circuit board is arranged in the housing;

[0012] A light emitting body, electrically connected to the circuit board, the light emitting body extends into the housing and emits detection light to the light filtering part located in the light-through hole;

[0013] An optical fiber connector, disposed at one end of the light-through hole, for connecting a sensing optical fiber;

[0014] The photoelectric detection module is arranged at the other end of the light-through hole and is electrically connected to the circuit board, and is used for receiving the returned light.

[0015] In an optional embodiment, a slot is recessed in the side wall of the shell, the insertion hole passes through the bottom of the slot, and the cover plate is inserted into the slot.

[0016] In an optional embodiment, the slot further has two side walls connected to the side of the slot bottom, and a limiting protrusion is formed at the outer edges of the two side walls of the slot. The limiting protrusion protrudes toward the center of the slot and presses against the side of the cover plate facing away from the slot bottom of the slot to limit the cover plate.

[0017] In an optional embodiment, in a first direction in which the filter is inserted into the socket, both ends of the filter are flush with two opposite side walls of the shell, and a width of the filter along a second direction matches a width of the socket along the second direction, wherein the second direction is perpendicular to the first direction.

[0018] In an optional embodiment, the socket includes an avoidance hole portion and two plug-in fitting hole portions distributed along the second direction, the two plug-in fitting hole portions are located one-to-one at both ends of the avoidance hole portion, the gap width of the plug-in fitting hole portions is adapted to the thickness of the filter, and the gap width of the avoidance hole portion is greater than the thickness of the filter, so that the filter is spaced apart from the side wall of the avoidance hole portion.

[0019] In an optional embodiment, the insertion hole is a through hole with two ends extending through two opposite side walls of the shell, and the two ends of the insertion hole are respectively covered with the cover plate.

[0020] In an optional embodiment, there are multiple light-through holes, which are distributed in parallel in the shell, one end of each light-through hole is provided with the optical fiber connector, and the other end is provided with the photoelectric detection module, and there are multiple light-emitting bodies, each of which emits detection light one-to-one to the filtering part located in each light-through hole.

[0021] In an optional embodiment, each of the light-passing through holes shares one filter, and the filter passes through the middle part of each of the light-passing through holes along the radial direction of the light-passing through holes, and forms the filter part corresponding to each of the light-emitting bodies one by one; and / or, the shell is a CNC-processed one-piece molded structure; and / or, the demodulator for sensor monitoring is a demodulator for fluorescence sensor monitoring.

[0022] In an optional embodiment, in the radial direction of the light-through hole, a plurality of the light-through holes are arranged in a row in parallel and opened in the housing;

[0023] In which, the shell is also provided with a plurality of light-transmitting holes which respectively connect the lower side of the shell with the middle part of each of the light-transmitting holes one-to-one, and the bottom side of the light-transmitting holes is also provided with a receiving groove which connects the light-transmitting holes, the circuit board is arranged on the lower side of the shell, and each of the light-emitting bodies is received one-to-one in each of the receiving grooves, and the lower side of the shell refers to one side of the shell in a third direction, and the third direction is a direction perpendicular to the plane where the plurality of light-transmitting holes are arranged in a row.

[0024] In another aspect, the utility model provides a monitoring device, comprising:

[0025] The aforementioned sensor monitoring demodulator;

[0026] A sensing optical fiber is connected to the optical fiber connector. The sensing monitoring demodulator is configured to perform environmental sensing through the sensing optical fiber. The environmental sensing includes one of temperature sensing and gas concentration sensing.

[0027] The beneficial effects of the embodiments of the utility model include:

[0028] The demodulator and monitoring device for sensing monitoring provided by the embodiment of the utility model are provided with a light-through hole and a plug hole extending radially from the light-through hole and passing through the light-through hole in the shell, and the filter is plugged into the plug hole, and the filter includes a filter part passing through the light-through hole; a cover plate is arranged on the shell and covers the plug hole; a circuit board is arranged on the shell; a light-emitting body is electrically connected to the circuit board, and the light-emitting body extends into the shell and emits detection light to the filter part located in the light-through hole; an optical fiber connector is arranged at one end of the light-through hole for connecting the sensing optical fiber; a photoelectric detection module is arranged at the other end of the light-through hole and electrically connected to the circuit board for receiving the return light. Compared with the related art, the utility model is provided with an additional cover plate, and the cover plate is covered on the plug hole, which can, on the one hand, play a good protective role for the filter and prevent external dust or impurities from entering the shell, thereby ensuring the permeability of the optical path and the cleanliness of the filter; on the other hand, it can play a stopping role for the filter to prevent the filter from falling out of the installation slot and affecting the temperature measurement effect, and has a simple structure, convenient assembly, and is not easy to be damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the external structure of a demodulator for sensing and monitoring provided by an embodiment of the utility model;

[0031] Figure 2 A cross-sectional view of the internal structure of a demodulator for sensing and monitoring provided by an embodiment of the utility model;

[0032] Figure 3 for Figure 2 A partial enlarged schematic diagram of middle III;

[0033] Figure 4 A schematic diagram of the exploded structure of a demodulator for sensing and monitoring provided by an embodiment of the utility model;

[0034] Figure 5 for Figure 4 A partial enlarged schematic diagram of middle Ⅳ;

[0035] Figure 6 for Figure 5 A schematic diagram of the structure of the middle shell;

[0036] Figure 7 for Figure 5 Cross-sectional view of the middle shell.

[0037] icon:

[0038] 100-demodulator for sensing and monitoring; 110-housing; 111-light-transmitting hole; 112-jack; 113-slot; 114-limiting protrusion; 115-avoidance hole; 117-plug-in mating hole; 118-stop step; 120-circuit board; 130-filter; 140-illuminant; 141-light-transmitting hole; 142-accommodating groove; 143-buffer sleeve; 150-photoelectric detection module; 160-optical fiber connector; 161-first plug; 162-second plug; 163-lens; 170-cover plate; 180-connector pressure plate. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] As disclosed in the background technology, in the related art, the filter needs to be installed after a hole is opened on the module. After installation, usually no additional protective structure is provided, which causes external dust and impurities to easily enter the interior through the hole, affecting the transparency of the light path and the cleanliness of the filter. In addition, the filter has a poor fixing effect and is prone to loosening, thus affecting its filtering effect.

[0046] In view of the above problems, an embodiment of the present utility model provides a novel demodulator for sensing and monitoring. The specific structure and principle of the demodulator for sensing and monitoring are described in detail below.

[0047] Please refer to Figures 1 to 3 Some embodiments of the present application provide a sensor monitoring demodulator 100 including a housing 110, a circuit board 120, a filter 130, a light emitter 140, a photoelectric detection module 150, an optical fiber connector 160 and a cover plate 170. The housing 110 is provided with a light-through hole 111 and a plug hole 112 extending along the radial direction of the light-through hole 111 and passing through the light-through hole 111. The filter 130 is plugged into the plug hole 112. The filter 130 includes a filter portion passing through the light-through hole 111. The cover plate 170 is arranged on the housing 110 and covers the jack 112, the circuit board 120 is arranged on the housing, the luminous body 140 is electrically connected to the circuit board 120, the luminous body 140 extends into the housing 110 and emits detection light to the filter part located in the light-through hole 111, the optical fiber connector 160 is correspondingly arranged at one end of the light-through hole 111 and is used to connect the sensing optical fiber, and the photoelectric detection module 150 is correspondingly arranged at the other end of the light-through hole 111 and is electrically connected to the circuit board 120. The demodulator 100 for sensing monitoring provided in some embodiments of the present application can play a good protective role on the filter 130, prevent external dust or impurities from entering the interior, ensure the permeability of the optical path and the cleanliness of the filter 130, and at the same time can limit the filter 130 to prevent loosening and affecting the filtering effect, with a simple structure, easy assembly, and not easy to damage.

[0048] In some embodiments, see Figure 1-5 The side wall of the housing 110 is provided with a plug hole 112 that penetrates the light-transmitting through hole 111. The filter 130 is plugged into the plug hole 112 and passes through the light-transmitting through hole 111. The filter 130 corresponds to the light emitter 140. The cover plate 170 is attached to the side wall of the housing 110 and covers the plug hole 112 to stop the filter 130. The structure is simple. The cover plate 170 is a plate structure and is not easily damaged. Specifically, it can be a metal plate or a hard plastic plate.

[0049] When the demodulator 100 for sensing and monitoring is working, it uses the luminous body 140 to emit light, which is reflected by the filter 130 and then emitted through the optical fiber connector 160, and is transmitted to the end to be measured through the optical fiber and then transmitted back. The returned optical signal, that is, the signal light or the return light, is received by the photoelectric detection module 150 after passing through the filter 130, and then demodulated to obtain the required information of the end of the optical fiber. Because it is additionally designed with a cover plate 170, the cover plate 170 covers the jack 112. On the one hand, it can play a good protective role for the filter 130 and prevent external dust or impurities from entering the interior of the housing 110, ensuring the permeability of the optical path and the cleanliness of the filter 130. On the other hand, it can stop the filter 130 and prevent the filter 130 from falling out of the jack 112 and affecting the work.

[0050] See also Figure 1 , Figures 4 to 5 In some embodiments of the present application, a slot 113 is recessed in the side wall of the housing 110, the jack 112 passes through the bottom of the slot 113, and the cover 170 is inserted into the slot 113. The jack 112 is provided on the bottom of the slot 113, the shape of the cover 170 matches the shape of the slot 113, and the cover 170 is assembled in the slot 113. Specifically, slots 113 are provided on two opposite side walls of the housing 110, the jack 112 passes through two opposite side walls of the housing 110, and the slots 113 of the two side walls are equipped with cover plates 170, and the two ends of the filter 130 can be limited by the two cover plates 170.

[0051] In some embodiments of the present application, see Figure 1 , Figures 4 to 5 The slot 113 also has two side walls connected to the bottom of the slot. The outer edges of the two side walls of the slot 113 form a limiting convex portion 114. The limiting convex portion 114 protrudes toward the center of the slot 113 and abuts against the side of the cover plate 170 that faces away from the bottom of the slot 113 to limit the cover plate 170. Specifically, the limiting convex portion 114 is spaced from the bottom of the slot 113 and forms a clamping gap for the cover plate 170 to be inserted. During actual assembly, the cover plate 170 is inserted into the clamping gap from top to bottom, and the limiting convex portion 114 is used to limit the cover plate 170 to ensure that the cover plate 170 is fixed in the slot 113, thereby blocking and protecting the jack 112. The structure is simple and the plugging is reliable.

[0052] In some embodiments of this application, see Figure 1 , Figures 4 to 5 The cover plate 170 may be in the shape of a rectangular sheet, and the thickness of the cover plate 170 is adapted to the gap width of the clamping gap, so that the cover plate 170 can be interference fitted in the clamping gap, thereby ensuring its fixing effect.

[0053] In some embodiments of the present application, see Figure 1 , Figures 4 to 5, in the first direction in which the filter disc 130 is inserted into the jack 112, the two ends of the filter disc 130 are flush with the two opposite side walls of the housing 110, and the width of the filter disc 130 along the second direction is adapted to the width of the jack 112 along the second direction, wherein the second direction is perpendicular to the first direction. Wherein, the two ends of the jack 112 penetrate to the two opposite side walls of the housing 110, the two ends of the filter disc 130 along the first direction are flush with the two opposite side walls of the housing 110, and the width of the filter disc 130 along the second direction is adapted to the width of the jack 112, wherein the second direction is perpendicular to the first direction. Specifically, the filter disc 130 can be in the shape of a rectangular sheet, and the first direction refers to the long side direction of the filter disc 130, and the second direction refers to the short side direction of the filter disc 130. In the long side direction, the length of the filter disc 130 is the same as the length of the jack 112, thereby ensuring that the filter disc 130 will not protrude from the housing 110 after being installed in place, and facilitating the subsequent installation of the cover plate 170. In the short side direction, the width of the filter 130 is the same as the width of the insertion hole 112, which ensures that the filter 130 can be exactly installed in the insertion hole 112 to avoid displacement during use.

[0054] In some embodiments of the present application, see Figures 5 to 7 The socket 112 includes an avoidance hole portion 115 and two plug-in fitting hole portions 117 distributed along the second direction. The two plug-in fitting hole portions 117 are located one-to-one at both ends of the avoidance hole portion 115. The gap width of the plug-in fitting hole portion 117 is adapted to the thickness of the filter 130, and the gap width of the avoidance hole portion 115 is greater than the thickness of the filter 130, so that the filter 130 is spaced apart from the side wall of the avoidance hole portion 115. Specifically, the plug hole 112 presents a structural feature of being wide in the middle and narrow at both ends in the second direction, the wider portion in the middle is configured as the avoidance hole portion 115, and the narrower portions at both ends are configured as the plug-in fitting hole portions 117, wherein the gap width of the plug-in fitting hole portion 117 is the same as the thickness of the filter 130, so that both ends of the filter 130 along the short side direction can be embedded in the plug-in fitting hole portion 117, and the gap width of the avoidance hole portion 115 is large and greater than the thickness of the filter 130, so that the effective area of ​​the filter 130 will not contact the two side edges of the plug hole 112 during the installation process to cause scratches, thereby effectively protecting the filter 130. In some embodiments of the present application, after the filter 130 is installed, the two side surfaces of the filter 130 are spaced from the side walls of the avoidance hole portion 115, which can simultaneously prevent the two side surfaces of the filter 130 from being scratched during the installation process.

[0055] In some embodiments of this application, reference Figure 4 The plug hole 112 is a through hole with two ends penetrating into two opposite side walls of the housing 110, and the two ends of the plug hole 112 are respectively covered with a cover plate 170. The plug hole 112 facilitates the rapid discharge of debris during the hole opening machining process, thereby improving the machining efficiency.

[0056] In addition, the demodulator in the related art is usually a single-channel demodulator, and there are still some problems in practical applications. First, this kind of application that requires temperature detection is not a single point, but multiple points, or dozens or even more points of multiple devices. It is obviously not enough to rely on a single demodulation module for measurement; secondly, this kind of demodulator has very high requirements on the accuracy of optical devices and shells. If it is measured by multiple demodulators of a device, the overall equipment accuracy is often reduced due to the difference in accuracy; finally, from the economic point of view, the cost is relatively high.

[0057] In view of this, in some embodiments of the present application, there are multiple light-through holes 111, and the multiple light-through holes 111 are distributed in parallel in the housing 110. One end of each light-through hole 111 is respectively provided with an optical fiber connector 160, and the other end of each light-through hole 111 is respectively provided with a photoelectric detection module 150. A plurality of light-emitting bodies 140 are provided on the circuit board 120, and the plurality of light-emitting bodies 140 emit detection light one-to-one to the filter part located in each light-through hole 111. The filter 130 is inserted obliquely through the plurality of light-through holes 111, specifically through the middle. When preparing the housing 110, the plurality of light-through holes 111 can be formed on the housing 110 by CNC processing; therefore, multi-channel and multi-point measurement with high integration and low-cost structure is achieved.

[0058] Then, in some embodiments of the present application, when assembling and manufacturing the demodulator 100 for sensor monitoring, each light-transmitting through hole 111 is provided with a light-emitting body 140, a filter 130, a photoelectric detection module 150 and a fiber optic connector 160, and multiple light-transmitting through holes 111 share one filter 130, which can reduce the number of parts, reduce the processing and assembly processes, and reduce costs.

[0059] In some embodiments of the present application, reference Figure 4-Figure 6 In the radial direction of the light-through hole 111, a plurality of light-through holes 111 are arranged in a row in parallel and are opened in the shell 110; wherein, the shell 110 is also provided with a plurality of light-transmitting holes 141 which respectively connect the lower side of the shell 110 with the middle part of each light-through hole 111 one-to-one, and the bottom side of the light-transmitting hole 141 is also provided with a receiving groove 142 which connects the light-transmitting holes, and the circuit board 120 is arranged on the lower side of the shell 110, and each light-emitting body 140 is accommodated in each receiving groove 142 one-to-one, wherein, the lower side of the shell 110 refers to one side of the shell 110 in the third direction, and the third direction is a direction perpendicular to the plane where the plurality of light-transmitting holes 111 are arranged in a row, and the structure is compactly arranged.

[0060] In some embodiments of the present application, reference Figure 1-Figure 4The circuit board 120 is arranged at the lower side of a plurality of light-transmitting through holes 111. A light-transmitting hole 141 corresponding to the filter 130 is provided in the middle of each light-transmitting through hole 111. A receiving groove 142 is also formed at the bottom side of the light-transmitting hole 141. The receiving groove 142 is communicated with the light-transmitting hole 141. The luminous body 140 is correspondingly received in the receiving groove 142. A buffer sleeve 143 is also arranged in the receiving groove 142. The buffer sleeve 143 is arranged around the luminous body 140 and abuts against the inner side wall of the receiving groove 142. Specifically, the luminous body 140 here can be an LED lamp bead. By providing the receiving groove 142, the luminous body 140 can be positioned and accommodated. During assembly, the luminous body 140 can be quickly positioned and installed in the receiving groove 142. The provision of the buffer sleeve 143 ensures the safe assembly of the luminous body 140 and avoids collision or scratches between the luminous body 140 and the light-transmitting hole 141 or the bottom of the receiving groove 142.

[0061] Please continue to see Figures 2 to 4 In some embodiments of the present application, each optical fiber connector 160 includes a first plug 161 and a second plug 162. The first plug 161 is accommodated at the end of the corresponding light-transmitting through hole 111. One end of the first plug 161 extends out of the end face of the housing 110 to accommodate the optical fiber ferrule. A lens 163 is also provided in the light-transmitting through hole 111 at a position opposite to the first plug 161. The lens 163 is used to correspond to the optical fiber ferrule. The second plug 162 is used to be sleeved on the outside of the optical fiber ferrule and installed at the end of the first plug 161 extending out of the housing 110. Here, the setting of the lens 163 can gather the optical signal returned by the optical fiber, so as to better transmit it to the photoelectric detection module 150 for reception. The first plug 161 extends out of the end face of the housing 110, which is convenient for plugging in the second plug 162 with the optical fiber ferrule. The outside of the optical fiber ferrule is fixed by the second plug 162. On the one hand, the external optical fiber structure can be fixed to ensure its precise positioning. On the other hand, the threaded assembly of the second plug 162 and the first plug 161 can ensure that the optical fiber ferrule is accurately and reliably inserted into the corresponding position of the optical fiber female connector, further ensuring the accuracy and reliability of the optical path.

[0062] In some embodiments of the present application, see Figures 3 to 7, a stop step 118 is also provided in each light-through hole 111, and the lens 163 is limited and fixed between the stop step 118 and the first plug 161 to achieve position fixation. Further, in some embodiments of the present application, a first gasket (not shown in the figure) is provided on one side of the lens 163, and the first gasket abuts on the stop step 118 to protect the lens 163; further, in some embodiments of the present application, a second gasket (not shown in the figure) is provided on the other side of the lens 163, and the first plug 161 abuts on the second gasket to protect the lens 163. Specifically, by providing the stop step 118, the installation position of the lens 163 and the first plug 161 can be determined, which facilitates the installation and positioning of the lens 163 and the first plug 161.

[0063] In some embodiments of this application, see Figure 1 , Figure 2 and Figure 4 The end surface of the housing 110 is also provided with a joint pressing plate 180, which can be connected to the housing 110 by means of screws and other mounting parts. The joint pressing plate 180 is provided with a plurality of mounting matching holes, which are correspondingly connected to a plurality of light-transmitting through holes 111. The shape of the mounting matching holes matches the shape of the portion of the first plug 161 extending out of the housing 110. The portion of the first plug 161 extending out of the housing 110 is assembled in the mounting matching holes, and the joint pressing plate 180 realizes the press-fitting limit of the first plug 161. Specifically, the outer periphery of the first plug 161 has a flange, and the joint pressing plate 180 is pressed against the side of the flange away from the light-transmitting through hole 111 to realize the press-fitting limit.

[0064] It should be noted that in some embodiments of the present application, an additional connector pressure plate 180 is designed, and the connector pressure plate 180 can simultaneously fix multiple optical fiber connectors 160. By adopting the connector pressure plate 180 to achieve fixed installation of the optical fiber connector 160, there is no need for the optical fiber connector 160 to be threadedly assembled on the housing 110, which avoids the need to additionally design internal and external thread structures in the optical fiber connector 160 and the light-through hole 111, and there is no need to assemble through threaded connections. The processing of internal and external threads is difficult and costly, and the coaxial accuracy is not easy to ensure. The implementation method of the present application reduces the processing difficulty and manufacturing cost, and has lower installation operation requirements.

[0065] The embodiment of the utility model further provides a monitoring device, which includes the demodulator for sensing monitoring and the sensing optical fiber in any of the above embodiments. In some embodiments, the demodulator for sensing monitoring 100 includes a housing 110, a circuit board 120, a filter 130, a light emitter 140, a photoelectric detection module 150, an optical fiber connector 160, and a cover plate 170. The housing 110 is provided with a light-through hole 111, and is provided with a socket 112 extending radially along the light-through hole 111 and passing through the light-through hole 111. The filter 130 is plugged into the socket 112. The filter 130 includes a filtering portion passing through the light-through hole 111. The cover plate 170 includes a filter 130, a filter 130, and a filter 130. 170 is disposed in the housing 110 and covers the insertion hole 112, the circuit board 120 is disposed in the housing, the luminous body 140 is electrically connected to the circuit board 120, the luminous body 140 extends into the housing 110 and emits detection light to the filter part located in the light-through hole 111, the optical fiber connector 160 is correspondingly disposed at one end of the light-through hole 111 and is used to connect the sensing optical fiber, and the photoelectric detection module 150 is correspondingly disposed at the other end of the light-through hole 111 and is electrically connected to the circuit board 120. In some embodiments, the demodulator for sensing monitoring is a fluorescent optical fiber temperature measurement demodulator.

[0066] In summary, the demodulator 100 and the monitoring device for sensing monitoring provided in some embodiments of the present application are provided with a light-through hole 111 in the shell 110, the optical fiber connector 160 is correspondingly arranged at one end of the light-through hole 111 and is used to connect the optical fiber ferrule, the photoelectric detection module 150 is correspondingly arranged at the other end of the light-through hole 111, the circuit board 120 is arranged in the shell 110, the light-emitting body 140 is arranged on the circuit board 120, and emits detection light into the light-through hole 111, and a socket 112 is arranged on the side wall of the shell 110, which penetrates the light-through hole 111 along the radial direction of the light-through hole 111, the filter 130 is plugged into the socket 112 and penetrates the light-through hole 111, the cover 170 is fixed on the side wall of the shell 110 and covers the socket 112, which can stop the filter 130 and can also prevent dust, has a simple structure, is easy to assemble, and is not easy to be damaged.

[0067] When using the demodulator 100 for sensing monitoring, the light emitter 140 emits detection light, which is reflected by the filter 130 and then emitted through the optical fiber connector 160, enters the sensing optical fiber, and is transmitted to the measured end through the sensing optical fiber and then returns the return light. The returned return light passes through the filter 130 and is received by the photoelectric detection module 150, and then demodulated to obtain the required information of the optical fiber end. Compared with the related art, the embodiment of the utility model is provided with an additional cover plate 170, which covers the jack 112. On the one hand, it can provide good protection for the filter 130 and prevent external dust or impurities from entering the housing 110, thereby ensuring the permeability of the optical path and the cleanliness of the filter 130. On the other hand, it can stop the filter 130 and prevent the filter 130 from falling out of the installation slot and affecting the filtering effect. The structure is simple, the assembly is convenient, and it is not easy to be damaged.

[0068] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A demodulator for sensing and monitoring, characterized in that: include: The housing is provided with a light-through hole and a plug hole extending in the radial direction of the light-through hole and penetrating the light-through hole; A filter, plugged into the jack, the filter comprising a light filtering portion passing through the light-transmitting through hole; A cover plate, disposed on the housing and covering the jack; A circuit board is arranged in the housing; A light emitting body, electrically connected to the circuit board, the light emitting body extends into the housing and emits detection light to the light filtering part located in the light-through hole; An optical fiber connector, disposed at one end of the light-through hole, for connecting a sensing optical fiber; The photoelectric detection module is arranged at the other end of the light-through hole and is electrically connected to the circuit board, and is used for receiving the returned light.

2. The sensor monitoring demodulator according to claim 1, characterized in that: The side wall of the shell is recessed with a slot, the insertion hole passes through the slot bottom, and the cover plate is inserted into the slot.

3. The sensor monitoring demodulator according to claim 2, characterized in that: The slot also has two side walls connected to the side of the slot bottom, and limiting protrusions are formed at the outer edges of the two side walls of the slot. The limiting protrusions abut against the side of the cover plate facing away from the slot bottom of the slot to limit the cover plate.

4. The sensor monitoring demodulator according to claim 2, characterized in that: In the first direction of the filter being inserted into the jack, both ends of the filter are flush with the two opposite side walls of the shell, and the width of the filter along the second direction matches the width of the jack along the second direction, wherein the second direction is perpendicular to the first direction.

5. The sensor monitoring demodulator according to claim 4, characterized in that: The socket includes an avoidance hole portion and two plug-in fitting hole portions distributed along the second direction, the two plug-in fitting hole portions are located one-to-one at both ends of the avoidance hole portion, the gap width of the plug-in fitting hole portion is adapted to the thickness of the filter, and the gap width of the avoidance hole portion is greater than the thickness of the filter, so that the filter is spaced apart from the side wall of the avoidance hole portion.

6. The sensor monitoring demodulator according to claim 1, characterized in that: The insertion hole is a through hole with two ends penetrating to two opposite side walls of the shell, and the two ends of the insertion hole are respectively covered with the cover plate.

7. The sensor monitoring demodulator according to any one of claims 1 to 5, characterized in that: There are multiple light-through holes, which are distributed in parallel in the shell. One end of each light-through hole is provided with the optical fiber connector, and the other end is provided with the photoelectric detection module. There are multiple light-emitting bodies, and each of the light-emitting bodies emits detection light one by one to the filter part located in each light-through hole.

8. The sensor monitoring demodulator according to claim 7, characterized in that: Each of the light-passing through holes shares one filter, and the filter passes through the middle part of each of the light-passing through holes along the radial direction of the light-passing through holes, and forms the filter part corresponding to each of the light-emitting bodies one by one; and / or, the shell is a CNC-processed one-piece molding structure; and / or, the demodulator for sensor monitoring is a demodulator for fluorescence sensor monitoring.

9. The sensor monitoring demodulator according to claim 7, characterized in that: In the radial direction of the light-through hole, a plurality of the light-through holes are arranged in a row in parallel and opened in the housing; In which, the shell is also provided with a plurality of light-transmitting holes which respectively connect the lower side of the shell with the middle part of each of the light-transmitting holes one-to-one, and the bottom side of the light-transmitting holes is also provided with a receiving groove which connects the light-transmitting holes, the circuit board is arranged on the lower side of the shell, and each of the light-emitting bodies is received one-to-one in each of the receiving grooves, and the lower side of the shell refers to one side of the shell in a third direction, and the third direction is a direction perpendicular to the plane where the plurality of light-transmitting holes are arranged in a row.

10. A monitoring device, characterized in that: include: The sensor monitoring demodulator according to any one of claims 1 to 9; A sensing optical fiber is connected to the optical fiber connector. The sensing monitoring demodulator is configured to perform environmental sensing through the sensing optical fiber. The environmental sensing includes one of temperature sensing and gas concentration sensing.

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