Object detection sensor for vehicle-mounted refrigerator

Abstract

The vehicle-mounted refrigerator article detection sensor comprises a box body, an infrared transmitting module and an infrared receiving module are symmetrically arranged on the left side face and the right side face of the box body, and the infrared transmitting module comprises a plurality of infrared transmitting tubes which are evenly arranged on a first PCB at intervals; the infrared receiving module comprises a plurality of infrared receiving tubes which are uniformly arranged on the second PCB at intervals, the infrared receiving tubes and the infrared transmitting tubes are in one-to-one correspondence to form infrared geminate transistors, and the first PCB and the second PCB are connected with the main control board through a first power supply signal line and a second power supply signal line respectively. The interior of the box body is detected in an infrared scanning mode through the infrared geminate transistors, identification interference caused by diffuse reflection of a large amount of infrared light in the box body due to the fact that a plurality of transmitting tubes transmit infrared rays at the same time can be avoided, and only one infrared geminate transistor is in a working state during each detection in the scanning process through the scanning mode; other infrared geminate transistors are in a standby state, so that the power consumption of working current is greatly reduced, and the service life of the infrared geminate transistors is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of infrared sensors, and in particular to an article detection sensor for a vehicle-mounted refrigerator. Background Art

[0002] With the popularity of new energy vehicles, intelligent car products are constantly upgraded, and smart car refrigerators will become standard. However, traditional car refrigerators are simply used to store items, and users often forget to take items away. If they are left for too long, food, drinks and other items may expire or even become smelly. At present, car refrigerators use weighing to identify whether there are items in the box, but this method cannot identify items that are too light (such as small candies and small fruits), and there are also problems such as physical expiration and odor. Using the detection sensor provided by this patent, it is possible to accurately detect whether there are items left in the car refrigerator, and it is also possible to remind users through the car instrument display, mobile phone, etc. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a vehicle-mounted refrigerator article detection sensor, which uses infrared tubes as a detection method to realize article detection in the box. It can identify light articles such as small candies and small fruits, as well as transparent articles such as transparent water bottles.

[0004] In order to achieve the above objectives, the technical solution adopted by the present invention is:

[0005] A vehicle refrigerator article detection sensor comprises a box body, wherein left and right sides of the box body are symmetrically provided with an infrared transmitting module and an infrared receiving module, wherein the infrared transmitting module comprises a first sensor housing, wherein a first PCB board is installed on a side wall of the first sensor housing away from the box body, wherein a plurality of infrared transmitting tubes are arranged along the length direction of the first PCB board, wherein the plurality of infrared transmitting tubes are evenly spaced and arranged on the first PCB board, wherein a first power signal line running through the bottom of the first sensor housing is connected to the first PCB board, wherein the infrared receiving module comprises a second sensor housing, wherein a second PCB board is installed on a side wall of the second sensor housing away from the box body, wherein the same number of infrared receiving tubes as the infrared transmitting tubes are arranged along the length direction of the second PCB board, wherein the infrared receiving tubes are evenly spaced and arranged on the second PCB board, and wherein the infrared receiving tubes correspond to the infrared transmitting tubes one by one to form infrared pairs, wherein the number of the infrared pairs is determined according to the detection coverage required by the size of the box body, wherein a second power signal line running through the bottom of the second sensor housing is connected to the second PCB board, wherein an end of the first power signal line away from the first PCB board and an end of the second power signal line away from the second PCB board are both connected to a main control board.

[0006] As a further solution of the present invention: the left and right sides of the box are respectively fixedly connected with installation frames for installing the infrared transmitting module and the infrared receiving module, the top and bottom surfaces of the first sensor housing and the second sensor housing are provided with a plurality of card blocks, and the installation frame is provided with card slots connected to the card blocks.

[0007] As a further solution of the present invention: both sides of the first sensor housing and the second sensor housing are provided with protrusions, both sides of the first PCB board and the second PCB are provided with grooves corresponding to the protrusions, and the first sensor housing and the second sensor housing are detachably connected to each other by respectively snapping the protrusions into the grooves.

[0008] As a further solution of the present invention: the panel materials of the left and right sides of the box body where the infrared transmitting module and the infrared receiving module are installed are made of transparent or infrared light-transmittable materials.

[0009] As a further solution of the present invention: the main control board includes a control module, the output end of the control module is electrically connected to the infrared transmitting tube, and the input end of the control module is electrically connected to the infrared receiving tube, wherein the control module is used to control the infrared transmitting tube to transmit infrared rays, control the transmission power of the infrared transmitting tube, obtain whether the infrared receiving tube receives the signal of the infrared transmitting tube transmitting infrared rays, and obtain the infrared intensity received by the infrared receiving tube.

[0010] As a further solution of the present invention: the control module is a PLC module, and the control module controls the infrared transmitting tube to emit infrared rays to the infrared receiving tube in sequence from one side of the first PCB board along the long side to the other side of the first PCB board.

[0011] As a further solution of the present invention: the main control board also includes a comparison module and a display module connected to the control module, the comparison module is used to compare the infrared intensity emitted by the infrared transmitting tube and the infrared intensity received by the infrared receiving tube, and the display module is used to display the comparison result of the comparison module.

[0012] As a further solution of the present invention: the main control board also includes a wireless connection module connected to the control module, and the display module is wirelessly connected to an external instrument display screen or a user's mobile phone through the wireless connection module to transmit the comparison result to the instrument display screen or the user's mobile phone.

[0013] As a further solution of the present invention: the infrared emission module includes a temperature sensor and ultraviolet lamp beads, the temperature sensor is used to monitor the temperature inside the first sensor housing, and the ultraviolet lamp beads are used to disinfect the inside of the box.

[0014] As a further solution of the present invention: the temperature sensor and the ultraviolet lamp beads are respectively mounted on the first PCB board, and are respectively connected to the control module of the main control board through the first power signal line.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention uses a plurality of infrared receiving tubes and infrared transmitting tubes installed on both sides of the box to form an infrared pair of tubes for infrared detection, and the number of infrared pairs of tubes is set according to the size of the box, so that it can fully identify whether there are light objects in the box. Compared with the weighing method, the weighing method may make misjudgments when identifying light objects, because the weighing method is a micro-deformation weighing method, which is a mechanical movement. In extreme environments, especially low temperatures, the weighing accuracy will be greatly reduced. The sensor of the present invention does not form mechanical movement when detecting objects, and even at low temperatures, the accuracy is higher and the service life is longer.

[0017] (2) The present invention realizes infrared detection of whether there are objects in the box by scanning mode by setting the control module of the main control board to a PLC control module. When the infrared light emitted by the infrared transmitting tube is blocked during the scanning process, the infrared receiving tube sends a signal with an infrared intensity of zero to the control module. The comparison module compares the intensity of the infrared light emitted by the infrared transmitting tube and transmits the result to an external instrument display screen or a user's mobile phone through a wireless connection module, so that it can be identified that there are objects in the box. Even when the box contains transparent objects, the infrared light emitted by the infrared transmitting tube is not completely blocked, but will be reflected when passing through the transparent objects. , refract, making its intensity weaker, the comparison module will receive the infrared intensity less than the intensity of the emitted infrared comparison result transmitted to the external instrument display or user's mobile phone through the wireless connection module, so as to identify that the box is filled with the object, such scanning detection can avoid the identification interference caused by a large amount of infrared light diffuse reflection in the box caused by multiple transmitting tubes emitting infrared rays at the same time, and can identify the objects in the box by area, in addition, the scanning method makes only one infrared tube in working state at each detection during the scanning process, and the other infrared tubes are in standby state, which greatly reduces the working current power consumption and prolongs the life of the infrared tubes.

[0018] (3) The present invention sets a temperature sensor to detect the temperature inside the first sensor housing, so that when the temperature changes greatly, water mist appears on the surface of the infrared emitting tube. The control module controls the infrared emitting tube to increase the emission power, so that its infrared penetration ability is enhanced, and the objects in the box are accurately identified. In addition, ultraviolet lamp beads can be added to the first PCB board to disinfect and sterilize the inside of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the vehicle refrigerator article detection sensor of this embodiment.

[0020] Figure 2 FIG. 4 is an exploded view of the infrared emission module of this embodiment.

[0021] Figure 3 FIG. 4 is an exploded view of the infrared receiving module of this embodiment.

[0022] Figure 4 This is a working principle diagram of the vehicle refrigerator article detection sensor of this embodiment.

[0023] The accompanying drawings are marked as: box 1, infrared transmitting module 2, first sensor housing 201, first PCB board 202, infrared transmitting tube 203, first power signal line 204, infrared receiving module 3, second sensor housing 301, second PCB board 302, infrared receiving tube 303, second power signal line 304, mounting frame 4, card block 5, card slot 6, protrusion 7, groove 8, control module 9, comparison module 10, display module 11, wireless connection module 12, instrument display screen 13, user mobile phone 14, temperature sensor 15, ultraviolet lamp beads 16. DETAILED DESCRIPTION

[0024] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings to make the technical solutions and beneficial effects of the present invention clearer and more specific.

[0025] like Figures 1 to 4As shown, the present embodiment provides a vehicle refrigerator article detection sensor, comprising a box body 1, an infrared transmitting module 2 and an infrared receiving module 3 are symmetrically arranged on the left and right sides of the box body 1, the infrared transmitting module 2 comprises a first sensor housing 201, a first PCB board 202 is installed on the side wall of the first sensor housing 201 away from the box body 1, a plurality of infrared transmitting tubes 203 are arranged on the first PCB board 202 along the length direction, the plurality of infrared transmitting tubes 203 are evenly spaced and arranged on the first PCB board 202, a first power signal line 204 that runs through the bottom of the first sensor housing 201 is connected to the first PCB board 202, the infrared receiving module 3 comprises a second sensor housing 301, the second sensor housing 3 01 is installed on the side wall away from the box body 1 inside, and the second PCB board 302 is provided with the same number of infrared receiving tubes 303 as the infrared transmitting tubes 203 along the length direction, and the infrared receiving tubes 303 are evenly spaced on the second PCB board 302, and the infrared receiving tubes 303 correspond to the infrared transmitting tubes 203 one by one to form infrared pairs, and the number of infrared pairs is determined according to the size of the box body 1 and the required detection coverage, and the second PCB board 302 is connected with a second power signal line 304 that runs through the bottom of the second sensor housing 301, and the end of the first power signal line 204 away from the first PCB board 202 and the end of the second power signal line 304 away from the second PCB board 302 are both connected to the main control board.

[0026] In this embodiment, if Figure 1 As shown, the left and right sides of the box body 1 are respectively fixedly connected with mounting frames 4 for mounting the infrared transmitting module 2 and the infrared receiving module 3, the top and bottom surfaces of the first sensor housing 201 and the second sensor housing 301 are provided with a plurality of card blocks 5, and the mounting frame 4 is provided with card slots 6 for engaging with the card blocks 5.

[0027] Specifically, the arrangement of the card block 5 and the card slot 6 enables the first sensor housing 201 and the second sensor housing 301 to be detachably connected to the outer side of the box body 1 , so as to facilitate the removal and installation of the infrared transmitting module 2 and the infrared receiving module 3 .

[0028] In this embodiment, if Figure 2 and Figure 3 As shown, both sides of the first sensor housing 201 and the second sensor 301 housing are provided with protrusions 7, and both sides of the first PCB board 202 and the second PCB board 302 are provided with grooves 8 corresponding to the protrusions 7, and the protrusions 7 are respectively engaged in the grooves 8 to be detachably connected to the inside of the first sensor housing 201 and the second sensor 301 housing.

[0029] Specifically, the arrangement of the protrusion 7 and the groove 8 enables the PCB board to be detachably connected to the sensor housing, so as to facilitate the inspection and replacement of the PCB board.

[0030] In this embodiment, the panel materials of the left and right side surfaces of the box body 1 where the infrared transmitting module 2 and the infrared receiving module 3 are installed are made of transparent or infrared light-transmissive materials.

[0031] Specifically, the material of the side panel on which the infrared transmitting module 2 and the infrared receiving module 3 are installed is processed to be transparent or infrared light-transmissive, so that the intensity of the infrared light emitted by the infrared transmitting tube 203 does not weaken when passing through the side wall of the box body 1.

[0032] In this embodiment, if Figure 4 As shown, the main control board includes a control module 9, the output end of the control module 9 is electrically connected to the infrared transmitting tube 203, and the input end of the control module 9 is electrically connected to the infrared receiving tube 303, wherein the control module 9 is used to control the infrared transmitting tube 203 to transmit infrared rays, control the transmission power of the infrared transmitting tube 203, and obtain whether the infrared receiving tube 303 receives the signal of the infrared transmitting tube 203 transmitting infrared rays, and obtain the infrared intensity received by the infrared receiving tube 303.

[0033] Specifically, the control module 9 is a core module of the main control board, which controls the infrared tube externally and other modules of the main control board internally.

[0034] In this embodiment, if Figure 4 As shown, the control module 9 is a PLC module, and the control module 9 sequentially controls the infrared emitting tube 203 on the first PCB board 202 to emit infrared rays to the infrared receiving tube 303 in the order from one side of the first PCB board 202 along the long side to the other side of the first PCB board 202.

[0035] Specifically, the control module 9 controls the infrared emitting tube 203 on the first PCB board 202 to emit infrared rays to the infrared receiving tube 303 in sequence from the left side of the first PCB board 202 along the long side to the right side of the first PCB board 202, and then controls the infrared emitting tube 203 on the first PCB board 202 to emit infrared rays to the infrared receiving tube 303 in sequence from the right side of the first PCB board 202 along the long side to the left side of the first PCB board 202, thereby realizing the infrared ray forward and backward cycle scanning detection inside the box 1.

[0036] In this embodiment, if Figure 4 As shown, the main control board also includes a comparison module 10 and a display module 11 connected to the control module 9. The comparison module 10 is used to compare the infrared intensity emitted by the infrared transmitting tube 203 and the infrared intensity received by the infrared receiving tube 303, and the display module 11 is used to display the comparison result of the comparison module 10.

[0037] Specifically, when the infrared intensity received by the infrared receiving tube 303 is zero or less than the infrared intensity emitted by the infrared emitting tube 203 , the comparison module 10 can determine that there are items in the box 1 , and display the existence of items in the box 1 through the display module 11 .

[0038] In this embodiment, if Figure 4 As shown, the main control board also includes a wireless connection module 12 connected to the control module 9. The display module 11 is wirelessly connected to an external instrument display screen 13 or a user's mobile phone 14 through the wireless connection module 12 to transmit the comparison result to the instrument display screen 13 or the user's mobile phone 14.

[0039] Specifically, the wireless connection module 12 is provided to facilitate the comparison result of the comparison module 10 to be displayed to the user through the instrument display screen 13 in the car without using a signal line, or to be displayed to the user through a mobile phone.

[0040] In this embodiment, if Figure 2 As shown, the infrared transmitting module 2 includes a temperature sensor 15 and an ultraviolet lamp bead 16. The temperature sensor 15 and the ultraviolet lamp bead 16 are respectively installed on the first PCB board 202, and are respectively connected to the control module 9 of the main control board through the first power signal line 204. The temperature sensor 15 is used to monitor the temperature inside the first sensor housing 201, and the ultraviolet lamp bead 16 is used to disinfect the inside of the box 1.

[0041] Specifically, the setting of the temperature sensor 15 causes water mist to appear on the surface of the infrared emitting tube 203 when the temperature changes greatly. The control module 9 controls the infrared emitting tube 203 to increase the emission power, so that the infrared penetration ability is enhanced and the objects in the box 1 are accurately identified; the setting of the ultraviolet lamp beads 16 enables the device to have the function of disinfecting the box 1.

[0042] like Figure 4As shown, the working principle of this embodiment is as follows: when the device is started, the control module 9 of the main control board controls the infrared pair of tubes. At this time, the control module 9 sequentially controls the infrared emitting tube 203 on the first PCB board 202 to emit infrared rays to the infrared receiving tube 303 in the order from the left side of the first PCB board 202 along the long side to the right side of the first PCB board 202, and then sequentially controls the infrared emitting tube 203 on the first PCB board 202 to emit infrared rays to the infrared receiving tube 303 in the order from the right side of the first PCB board 202 along the long side to the left side of the first PCB board 202, so as to achieve the infrared back and forth cycle scanning detection inside the box 1. When non-transparent objects are placed in the box 1, the infrared rays emitted by the infrared emitting tube 201 are blocked during the infrared scanning process, and the infrared receiving tube 301 sends a signal of zero infrared intensity to the control module 9, and the comparison module 10 compares the infrared emitting tube 201 with the infrared emitting tube 201. The intensity comparison result of the emitted infrared ray is transmitted to the external instrument display screen 13 or the user's mobile phone 14 through the wireless connection module 12, so that the box 1 is identified to contain an object; when the box 1 contains a transparent object, the infrared ray emitted by the infrared emitting tube 201 is not completely blocked, but will be reflected and refracted when passing through the transparent object, so that its intensity becomes weaker, and the comparison module 10 will receive the infrared ray The intensity is less than the intensity of the emitted infrared ray. The comparison result is transmitted to the external instrument display screen 13 or the user's mobile phone 14 through the wireless connection module 12, so that the box 1 is identified to contain the object; during operation, when the temperature sensor 15 detects that the temperature change in the first sensor housing 201 is large, the temperature sensor 15 transmits a signal of large temperature change to the control module 9, and the control module 9 controls the infrared emitting tube 203 to increase the transmission power, so that its infrared penetration ability is enhanced.

[0043] The above are only preferred specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed in this embodiment, according to the technical solution and the inventive concept of this embodiment, makes equivalent replacement or changes, which should be included in the protection scope of this embodiment. The above are only preferred specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed in this embodiment, according to the technical solution and the inventive concept of this embodiment, makes equivalent replacement or changes, which should be included in the protection scope of this embodiment.

Claims

1. A vehicle refrigerator article detection sensor, comprising a box (1), characterized in that: The left and right sides of the box (1) are symmetrically provided with an infrared transmitting module (2) and an infrared receiving module (3); the infrared transmitting module (2) comprises a first sensor housing (201); a first PCB board (202) is installed on a side wall of the first sensor housing (201) away from the box (1); a plurality of infrared transmitting tubes (203) are arranged on the first PCB board (202) along the length direction; the plurality of infrared transmitting tubes (203) are evenly spaced and arranged on the first PCB board (202); a first power signal line (204) penetrating the bottom of the first sensor housing (201) is connected to the first PCB board (202); the infrared receiving module (3) comprises a second sensor housing (301); a first PCB board (202) is installed on a side wall of the first sensor housing (201) away from the box (1); A second PCB board (302) is mounted on the side wall. The second PCB board (302) is provided with the same number of infrared receiving tubes (303) as the infrared transmitting tubes (203) along the length direction. The infrared receiving tubes (303) are evenly spaced on the second PCB board (302). The infrared receiving tubes (303) correspond to the infrared transmitting tubes (203) one by one to form infrared pairs. The number of infrared pairs is determined according to the size of the box body (1) and the required detection coverage. The second PCB board (302) is connected with a second power signal line (304) that runs through the bottom of the second sensor housing (301). The end of the first power signal line (204) away from the first PCB board (202) and the end of the second power signal line (304) away from the second PCB board (302) are both connected to the main control board.

2. The vehicle refrigerator article detection sensor according to claim 1, characterized in that: The left and right sides of the box body (1) are respectively fixedly connected with mounting frames (4) for mounting an infrared transmitting module (2) and an infrared receiving module (3); the top and bottom surfaces of the first sensor housing (201) and the second sensor housing (301) are both provided with a plurality of card blocks (5); and the mounting frame (4) is provided with card slots (6) for engaging with the card blocks (5).

3. The vehicle refrigerator article detection sensor according to claim 1, characterized in that: Both sides of the first sensor housing (201) and the second sensor housing (301) are provided with protrusions (7), and both sides of the first PCB board (202) and the second PCB board (302) are provided with grooves (8) corresponding to the protrusions (7). The protrusions (7) are respectively engaged in the grooves (8) so as to be detachably connected to the inside of the first sensor housing (201) and the second sensor (301) housing.

4. The vehicle refrigerator article detection sensor according to claim 1, characterized in that: The panel materials of the left and right sides of the box body (1) where the infrared transmitting module (2) and the infrared receiving module (3) are installed are made of transparent or infrared light-permeable materials.

5. The vehicle refrigerator article detection sensor according to claim 1, characterized in that: The main control board comprises a control module (9), wherein an output end of the control module (9) is electrically connected to an infrared transmitting tube (203), and an input end of the control module (9) is electrically connected to an infrared receiving tube (303), wherein the control module (9) is used to control the infrared transmitting tube (203) to transmit infrared rays, control the transmission power of the infrared transmitting tube (203), obtain whether the infrared receiving tube (303) receives a signal of infrared rays transmitted by the infrared transmitting tube (203), and obtain the intensity of infrared rays received by the infrared receiving tube (303).

6. The vehicle refrigerator article detection sensor according to claim 5, characterized in that: The control module (9) is a PLC module, and the control module (9) sequentially controls the infrared transmitting tube (203) to transmit infrared rays to the infrared receiving tube (303) in the order from one side of the first PCB board (202) along the long side to the other side of the first PCB board (202).

7. The vehicle refrigerator article detection sensor according to claim 5, characterized in that: The main control board also includes a comparison module (10) and a display module (11) connected to the control module (9); the comparison module (10) is used to compare the intensity of infrared rays emitted by the infrared emitting tube (203) and the intensity of infrared rays received by the infrared receiving tube (303); and the display module (11) is used to display the comparison result of the comparison module (10).

8. The vehicle refrigerator article detection sensor according to claim 5, characterized in that: The main control board also includes a wireless connection module (12) connected to the control module (9), and the display module (11) is wirelessly connected to an external instrument display screen (13) or a user's mobile phone (14) via the wireless connection module (12), and transmits the comparison result to the instrument display screen (13) or the user's mobile phone (14).

9. The vehicle refrigerator article detection sensor according to claim 1, characterized in that: The infrared emission module (2) comprises a temperature sensor (15) and an ultraviolet lamp bead (16); the temperature sensor (15) is used to monitor the temperature inside the first sensor housing (201); and the ultraviolet lamp bead (16) is used to sterilize the interior of the box (1).

10. The vehicle refrigerator article detection sensor according to claim 5 or 9, characterized in that: The temperature sensor (15) and the ultraviolet lamp bead (16) are respectively mounted on the first PCB board (202), and are respectively connected to the control module (9) of the main control board via the first power signal line (204).

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