Full-scene application type echelette grating

Abstract

The utility model discloses an echelette grating capable of being used in all scenes. The echelette grating comprises an infrared transmitter and an infrared receiver. Wherein the infrared transmitter comprises an infrared transmitter, a frequency control and modulation output microprocessor, a first frequency selection switch, a first power supply voltage monitoring circuit, a first power supply circuit and a first buzzer; the infrared receiver comprises an infrared receiver, a frequency control and signal identification processing microprocessor, a second frequency selection switch, a second power supply voltage monitoring circuit, a second power supply circuit, a second buzzer, a trigger mode selection switch, a response time selection switch and an alarm output relay; the infrared grating provided by the utility model has the advantages of wide selectable working frequency range, multiple selectable trigger modes, wide selectable response time range and stable and reliable working, can be applied to complex environments such as strong light interference, strong magnetic interference and interference of like products and conventional environments without interference factors, and is a full-scene applicable infrared grating detector.

Description

Technical Field

[0001] This utility model belongs to the field of detectors, and in particular relates to an infrared grating that can be applied in all scenarios. Background Technology

[0002] Infrared gratings are a type of universal intrusion detector widely used in doors and windows, walls, passageways, entrances and exits, building perimeters, weighbridge systems, research facilities, and other locations. Currently, infrared gratings on the market typically have 4-12 beams, with an approximate 15cm spacing between adjacent beams. The alarm condition is that the infrared receiver fails to receive the corresponding infrared signal from the transmitter's beam for ≥40ms between any two adjacent beams. In practical applications, the following situations frequently occur: 1. When multiple pairs of infrared gratings are installed in parallel or intersecting locations within the same system or local environment, the infrared beams of these pairs overlap and superimpose. This interference prevents the infrared receiver in the system or local environment from receiving the signal from its paired transmitter. When the infrared receiver fails to receive the normal signal from two adjacent beams for 40ms, it will trigger an alarm, resulting in a false alarm. 2. Infrared gratings are installed on walls to prevent unauthorized intruders from scaling the wall and entering the protected area to carry out sabotage activities. However, infrared gratings installed on walls are easily blocked by birds or large fallen leaves, causing the beams of two adjacent beams to be interrupted simultaneously for more than 40ms, resulting in false alarms. 3. Infrared gratings are installed on the ground around buildings or the target protected area. When pets are active within the protected area, and the height of the pet is more than 15cm above the height formed by two adjacent beams of the infrared grating, a false alarm will be triggered. 4. Infrared gratings are used in high electromagnetic radiation locations such as substations or high-speed rail stations / tracks. Due to interference from high electromagnetic radiation, the infrared beams may be interrupted. 5. If the infrared grating is installed in a location exposed to direct sunlight or car headlights, strong sunlight or car headlights may cause some beams to fail to receive the signal from the infrared transmitter. If two adjacent beams fail to receive the signal from the infrared transmitter for more than 40ms, the infrared receiver will issue an alarm, resulting in a false alarm.

[0003] The above-mentioned applications of infrared gratings are very common in perimeter security systems. However, due to the high false alarm rate of infrared gratings in these application environments, it has caused a lot of confusion and trouble for many security system contractors and users. Some systems cannot pass the client's acceptance after installation because of the high false alarm rate; some equipment has passed the acceptance but has been abandoned by the client because of the high false alarm rate.

[0004] Traditional infrared gratings are prone to false alarms in strong light, strong magnetic fields, complex environments, and environments where similar products can interfere with each other. This has been a major problem for infrared grating manufacturers, security system engineers, and users for many years. Utility Model Content

[0005] To solve the above problems, this utility model provides the following solution: an infrared grating applicable to all scenarios, including an infrared transmitter and an infrared receiver used in conjunction with the infrared transmitter;

[0006] The infrared transmitter includes an infrared transmitter, a frequency control and modulation output microprocessor, a first frequency selection switch, a first power supply voltage monitoring circuit, a first power supply circuit, and a first buzzer.

[0007] The infrared transmitter is connected to the frequency control and modulation output microprocessor and the first power supply circuit respectively; the first power supply voltage monitoring circuit is connected to the frequency control and modulation output microprocessor and the first power supply circuit respectively; the first frequency selection switch and the first buzzer are both connected to the frequency control and modulation output microprocessor.

[0008] The infrared receiver includes an infrared receiver, a frequency control and signal recognition processing microprocessor, a second frequency selection switch, a second power supply voltage monitoring circuit, a second power supply circuit, a second buzzer, a trigger mode selection switch, a response time selection switch, and an alarm output relay.

[0009] The infrared receiver is connected to the frequency control and signal recognition processing microprocessor and the second power supply circuit, respectively; the second power supply voltage monitoring circuit is connected to the frequency control and signal recognition processing microprocessor and the second power supply circuit, respectively; the alarm output relay and the second buzzer are connected to the frequency control and signal recognition processing microprocessor; the frequency control and signal recognition processing microprocessor is connected to the second frequency selection switch, the trigger mode selection switch, and the response time selection switch, respectively.

[0010] Preferably, the number of beams of the infrared transmitter is the same as the number of beams of the infrared receiver, and they are arranged in pairs.

[0011] Preferably, when the first power supply voltage monitoring circuit detects that the input voltage of the first power supply circuit is lower than DC9V, the frequency control and modulation output microprocessor drives the first buzzer to emit a low-voltage alarm tone.

[0012] Preferably, when the second power supply voltage monitoring circuit detects that the input voltage of the second power supply circuit is lower than DC7.5V, the frequency control and signal recognition processing microprocessor drives the second buzzer to emit a low-voltage alarm tone.

[0013] Preferably, the first power supply circuit is used to simultaneously output DC5V power and DC9V power; the DC5V power supply powers the frequency control and modulation output microprocessor and the first buzzer, and the DC9V power supply powers the infrared transmitter.

[0014] Preferably, the second power supply circuit is used to output DC5V power, which powers the frequency control and signal recognition processing microprocessor, infrared receiver, alarm output relay, and second buzzer.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects:

[0016] This invention expands the selectable range of infrared grating trigger response times and alarm trigger modes by increasing the number of selectable infrared grating operating frequencies. This allows for different operating frequencies to be set for different environments (e.g., four pairs of infrared gratings installed in a "U" shape around a target area can be set to four different frequencies (A, B, C, and D) to avoid false alarms caused by interference between gratings of the same frequency). Different trigger response times can be set for different installation locations (e.g., when the infrared grating is installed on a wall, the trigger response time can be increased to 200ms or 400ms to avoid false alarms caused by birds or large leaves quickly passing through the grating's protected area). Different trigger modes can be set for different application environments (e.g., in places with strong direct sunlight or dense use of infrared gratings, the alarm trigger mode can be set to only trigger when three adjacent beams simultaneously fail to receive a signal, or when four adjacent beams simultaneously fail to receive a signal, thus improving the alarm conditions of the infrared grating and eliminating false alarms).

[0017] This invention effectively solves the shortcomings of current infrared gratings, which have limited application range and are prone to false alarms due to the limited number of selectable operating frequencies, single trigger response time, and single trigger mode. It has the advantages of multiple selectable operating frequencies, a wide range of selectable response times, multiple selectable alarm trigger modes, applicability to all scenarios, and stable and reliable operation. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the system structure of an embodiment of the present utility model;

[0020] In the diagram, 1. Infrared transmitter; 11. Infrared transmitter; 12. Frequency control and modulation output microprocessor; 13. First frequency selection switch; 14. First power supply voltage monitoring circuit; 15. First power supply circuit; 16. First buzzer; 2. Infrared receiver; 21. Infrared receiver; 22. Frequency control and signal recognition processing microprocessor; 23. Second frequency selection switch; 24. Second power supply voltage monitoring circuit; 25. Second power supply circuit; 26. Second buzzer; 27. Trigger mode selection switch; 28. Response time selection switch; 29. ​​Alarm output relay. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0023] The present invention provides an infrared grating applicable to all scenarios, including an infrared transmitter 1 and an infrared receiver 2 used in conjunction with the infrared transmitter 1;

[0024] The infrared transmitter 1 includes an infrared transmitter 11, a frequency control and modulation output microprocessor 12, a first frequency selection switch 13, a first power supply voltage monitoring circuit 14, a first power supply circuit 15, and a first buzzer 16.

[0025] Infrared transmitter 11 is connected to frequency control and modulation output microprocessor 12 and first power supply circuit 15 respectively; first power supply voltage monitoring circuit 14 is connected to frequency control and modulation output microprocessor 12 and first power supply circuit 15 respectively; first frequency selection switch 13 and first buzzer 16 are both connected to frequency control and modulation output microprocessor 12.

[0026] The infrared receiver 2 includes an infrared receiver 21, a frequency control and signal recognition processing microprocessor 22, a second frequency selection switch 23, a second power supply voltage monitoring circuit 24, a second power supply circuit 25, a second buzzer 26, a trigger mode selection switch 27, a response time selection switch 28, and an alarm output relay 29.

[0027] Infrared receiver 21 is connected to frequency control and signal recognition processing microprocessor 22 and second power supply circuit 25 respectively; second power supply voltage monitoring circuit 24 is connected to frequency control and signal recognition processing microprocessor 22 and second power supply circuit 25 respectively; alarm output relay 29 and second buzzer 26 are connected to frequency control and signal recognition processing microprocessor 22; frequency control and signal recognition processing microprocessor 22 is connected to second frequency selection switch 23, trigger mode selection switch 27 and response time selection switch 28 respectively.

[0028] Furthermore, the number of beams in infrared transmitter 1 is the same as the number of beams in infrared receiver 2, and they are set up in pairs.

[0029] Furthermore, when the first power supply voltage monitoring circuit 14 detects that the input voltage of the first power supply circuit 15 is lower than DC9V, the frequency control and modulation output microprocessor 12 drives the first buzzer 16 to emit a low-voltage alarm tone.

[0030] Furthermore, when the second power supply voltage monitoring circuit 24 detects that the input voltage of the second power supply circuit 25 is lower than DC7.5V, the frequency control and signal recognition processing microprocessor 22 drives the second buzzer 26 to emit a low-voltage alarm tone.

[0031] Furthermore, the first power supply circuit 15 is used to simultaneously output DC5V power and DC9V power; the DC5V power supply powers the frequency control and modulation output microprocessor 12 and the first buzzer 16, and the DC9V power supply powers the infrared transmitter 11.

[0032] Furthermore, the second power supply circuit 25 is used to output DC5V power, which powers the frequency control and signal recognition processing microprocessor 22, infrared receiver 21, alarm output relay 29, and second buzzer 26.

[0033] Furthermore, both the frequency control and modulation output microprocessor and the frequency control and signal recognition processing microprocessor store at least four management programs for selectable operating frequencies, which are selected via a first frequency selection switch and a second frequency selection switch.

[0034] Furthermore, the frequency control and modulation output microprocessor has the same frequency as the management program for selectable operating frequencies stored within the frequency control and signal recognition processing microprocessor.

[0035] Furthermore, the first frequency selection switch and the second frequency selection switch are provided with at least four different selectable operating frequencies, and the operating frequencies of the first frequency selection switch and the second frequency selection switch are the same.

[0036] Furthermore, the trigger mode selection switch can be set to at least four different beam trigger modes.

[0037] Furthermore, the response time selection switch can be set to at least four different response times, and the settable response time is within the range of 40ms-700ms.

[0038] Example 1

[0039] like Figure 1 As shown, the infrared grating applicable to all scenarios disclosed in this utility model includes: an infrared transmitter 1 and an infrared receiver 2; wherein, the first frequency selection switch 13 of the infrared transmitter 1 is connected to the frequency control and modulation output microprocessor 12; the infrared transmitter 11 of the infrared transmitter 1 is connected to the frequency control and modulation output microprocessor 12 and the first power supply circuit 15 respectively; the first power supply voltage monitoring circuit 14 of the infrared transmitter 1 is connected to the frequency control and modulation output microprocessor 12 and the first power supply circuit 15 respectively; and the first buzzer 16 of the infrared transmitter 1 is connected to the frequency control and modulation output microprocessor 12. The second frequency selection switch 23 of the infrared receiver 2 is connected to the frequency control and signal recognition processing microprocessor 22; the trigger mode selection switch 27 of the infrared receiver 2 is connected to the frequency control and signal recognition processing microprocessor 22; the response time selection switch 28 of the infrared receiver 2 is connected to the frequency control and signal recognition processing microprocessor 22; the frequency control and signal recognition processing microprocessor 22 of the infrared receiver 2 is also connected to a second buzzer 26 and an alarm output relay 29; the infrared receiver 21 of the infrared receiver 2 is connected to the frequency control and signal recognition processing microprocessor 22 and the second power supply circuit 25 respectively; the second power supply voltage monitoring circuit 24 of the infrared receiver 2 is connected to the frequency control and signal recognition processing microprocessor 22 and the second power supply circuit 25 respectively.

[0040] Furthermore, this invention includes frequency selection switches and frequency control management microprocessors on both the infrared transmitter 1 and infrared receiver 2 of the infrared grating, each capable of selecting at least four different frequencies. The frequency control management microprocessors of both the infrared transmitter 1 and infrared receiver 2 store management programs for at least four selectable frequencies, and the at least four selectable frequencies stored in the microprocessors of both are identical. The infrared transmitter 1 outputs a corresponding modulation frequency according to the instruction of its built-in first frequency selection switch 13, and the infrared transmitter 11 of the modulating infrared transmitter 1 outputs an infrared signal of the corresponding frequency. The infrared receiver 2, according to the instruction of its built-in frequency selection switch, compares the frequency of the infrared signal received by the infrared receiver 21 with the frequency corresponding to the instruction. When the frequency of the signal received by the infrared receiver 21 matches the instruction frequency of the frequency selection switch of the infrared receiver 2, the output signal of the infrared receiver 2 remains unchanged; when the infrared receiver 2 does not receive an infrared signal of the same frequency as the frequency selection switch, the output signal of the infrared receiver 2 changes, triggering an alarm response. The alarm output relay 29 changes from being engaged to being disengaged, and simultaneously, a buzzer sounds an alarm.

[0041] Furthermore, this invention provides a beam triggering mode selection switch 27 on the infrared receiver 2 of the infrared grating, which allows selection of at least four different modes. The four beam triggering modes are: 1. Single beam triggering alarm mode – the infrared receiver 2 outputs an alarm signal when a single beam fails to receive a signal of the corresponding frequency from the infrared transmitter 1; 2. Two beam triggering alarm mode – the infrared receiver 2 outputs an alarm signal when any two adjacent beams fail to receive a signal of the corresponding frequency from the infrared transmitter 1; 3. Three beam triggering alarm mode – the infrared receiver 2 outputs an alarm signal when any three adjacent beams fail to receive a signal of the corresponding frequency from the infrared transmitter 1; 4. Four beam triggering alarm mode – the infrared receiver 2 outputs an alarm signal when any four adjacent beams fail to receive a signal of the corresponding frequency from the infrared transmitter 1. Users can choose different triggering modes according to different application environments. For example, in places where small animals are present, in order to prevent the infrared grating from being accidentally triggered by small animals, the triggering mode can be selected as the four-beam triggering alarm mode. When the four-beam triggering alarm mode is selected, the height of the object that can trigger the grating alarm must be greater than 4*15cm=60cm. Small animals that are less than 60cm tall will not cause false alarms when they move between the grating transmitter and receiver.

[0042] Furthermore, this invention includes an infrared receiver 2 with an infrared grating, equipped with a response time selection switch 28 that allows for at least four different response times. The response time refers to the time after which the infrared receiver 21 will not receive a signal from the infrared transmitter 11 before triggering an alarm. The response time selection switch 28 can select at least four different trigger response times between 40 and 700 ms, such as 40 ms, 100 ms, 300 ms, and 700 ms.

[0043] Because different response times are available, users can flexibly select the appropriate response time based on the installation location or the object being monitored in practical applications. For example, if an infrared light grid is installed on a wall and the traditional 40ms response time is selected, it is easily triggered by birds, large falling leaves, etc., causing false alarms. The purpose of installing an infrared light grid on a wall is to prevent unauthorized individuals from climbing over the wall to enter the protected area and cause damage. If someone were to climb over the wall from the outside, their reaction time would require at least 2-3 seconds.

[0044] Therefore, the response time of the infrared grating installed on the wall can be selected to be 700ms, which can eliminate false alarms caused by birds or large falling leaves.

[0045] Both the infrared transmitter 1 and the infrared receiver 2 are equipped with power supply circuits. The power supply circuit of the infrared transmitter 1 outputs a stable DC5V power supply and a DC9V power supply simultaneously. The DC5V power supply powers the frequency control and modulation output microprocessor 12 and the buzzer of the infrared transmitter 1, while the DC9V power supply powers the infrared transmitter 11 of the infrared transmitter 1. The power supply circuit of the infrared receiver 2 outputs a stable DC5V power supply, which powers the frequency control and signal recognition processing microprocessor 22, the infrared receiver 21, the alarm output relay 29, and the buzzer.

[0046] In a further optimization scheme, the number of beams in the infrared grating is unlimited, and the number of beams in the infrared transmitter 1 is the same as the number of beams in the infrared receiver 2, which are set in pairs.

[0047] In a further optimization, the first power supply voltage monitoring circuit 14, when detecting that the power input voltage of the infrared transmitter 1 is lower than DC 9V, will cause the frequency control and modulation output microprocessor 12 of the infrared transmitter 1 to drive the first buzzer 16 to emit a low-voltage alarm tone. Similarly, the second power supply voltage monitoring circuit 24, when detecting that the power input voltage of the infrared receiver 2 is lower than DC 7.5V, will cause the frequency control and signal recognition processing microprocessor 22 of the infrared receiver 2 to drive the second buzzer 26 to emit a low-voltage alarm tone.

[0048] In practical applications, if a user plans to install at least four pairs of 4-beam infrared gratings on the perimeter walls of a detached villa to establish the first line of defense, and at least four pairs of 12-beam infrared gratings on the ground around the house inside the villa's perimeter walls to establish the second line of defense. If the infrared gratings on the perimeter walls detect unauthorized individuals climbing over the walls, they will promptly trigger an alarm, effectively preventing them from entering the villa area. If unauthorized individuals attempt to enter the villa using other methods, the infrared gratings installed on the ground around the house will promptly detect the intrusion and issue an alarm signal, preventing further illegal intrusion. In such an application scenario, if traditional infrared gratings are used, at least four pairs of infrared gratings on the villa wall will inevitably cause mutual interference of infrared beams, and at least four pairs of infrared gratings installed in the yard will also cause mutual interference of beams; moreover, the infrared gratings installed on the wall may be affected by birds or large fallen leaves, resulting in false alarms; the infrared gratings installed inside the villa yard may also cause false alarms at any time due to the activity of the user's pets; such false alarms that may occur at any time will definitely cause disturbance and confusion to the user. If the infrared grating of this utility model is selected, based on the above application scenarios, the following functional selections and settings can be made for the infrared gratings installed on-site: 1. Select four different operating frequencies for the minimum four pairs of infrared gratings installed on the wall, ensuring that the frequencies of adjacent infrared gratings are inconsistent. Similarly, select four different operating frequencies for the minimum four pairs of infrared gratings installed in the yard, ensuring that the frequencies of adjacent infrared gratings are inconsistent and eliminating interference between gratings of the same frequency; 2. Set the response time of the 4-beam infrared grating installed on the wall to 700ms to eliminate the potential risk of false alarms caused by birds or falling leaves; 3. Select the trigger mode of the 12-beam infrared grating installed in the yard as the 4-beam trigger alarm mode to eliminate the risk of false alarms caused by pets in the yard. Through these steps, the infrared grating of this utility model can effectively avoid or eliminate false alarms.

[0049] The above is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An infrared grating applicable to all scenes, characterized in that, It comprises an infrared transmitter (1) and an infrared receiver (2) matched with the infrared transmitter (1). The infrared transmitter (1) comprises an infrared emitter (11), a frequency control and modulation output microprocessor (12), a first frequency selection switch (13), a first power supply voltage monitoring circuit (14), a first power supply circuit (15), and a first buzzer (16). The infrared emitter (11) is connected with the frequency control and modulation output microprocessor (12) and the first power supply circuit (15) respectively; the first power supply voltage monitoring circuit (14) is connected with the frequency control and modulation output microprocessor (12) and the first power supply circuit (15) respectively; the first frequency selection switch (13) and the first buzzer (16) are connected with the frequency control and modulation output microprocessor (12). The infrared receiver (2) comprises an infrared receiver (21), a frequency control and signal identification processing microprocessor (22), a second frequency selection switch (23), a second power supply voltage monitoring circuit (24), a second power supply circuit (25), a second buzzer (26), a trigger mode selection switch (27), a response time selection switch (28), and an alarm output relay (29). The infrared receiver (21) is connected with the frequency control and signal identification processing microprocessor (22) and the second power supply circuit (25) respectively; the second power supply voltage monitoring circuit (24) is connected with the frequency control and signal identification processing microprocessor (22) and the second power supply circuit (25) respectively; the alarm output relay (29) and the second buzzer (26) are connected with the frequency control and signal identification processing microprocessor (22); the frequency control and signal identification processing microprocessor (22) is connected with the second frequency selection switch (23), the trigger mode selection switch (27), and the response time selection switch (28) respectively.

2. The infrared grating applicable to full scene according to claim 1, wherein, The number of light beams of the infrared transmitter (1) is the same as that of the infrared receiver (2), and they are arranged in pairs. 3.The full scene applicable infrared grating according to claim 1, characterized in that, When the first power supply voltage monitoring circuit (14) monitors that the input voltage of the first power supply circuit (15) is lower than DC 9V, the frequency control and modulation output microprocessor (12) drives the first buzzer (16) to emit a low-voltage alarm prompt sound. 4.The full scene applicable infrared grating according to claim 1, wherein, When the second power supply voltage monitoring circuit (24) monitors that the input voltage of the second power supply circuit (25) is lower than DC 7.5V, the frequency control and signal identification processing microprocessor (22) drives the second buzzer (26) to emit a low-voltage alarm prompt sound.

5. The all-scene applicable infrared grating according to claim 1, wherein, The first power supply circuit (15) is used for outputting DC 5V power supply and DC 9V power supply simultaneously; the DC 5V power supply is used for powering the frequency control and modulation output microprocessor (12) and the first buzzer (16), and the DC 9V power supply is used for powering the infrared emitter (11). 6.The full scene applicable infrared grating according to claim 1, wherein, The second power supply circuit (25) is used for outputting DC 5V power supply, and the frequency control and signal identification processing microprocessor (22), infrared receiver (21), alarm output relay (29), second buzzer (26) are powered by the DC 5V power supply.

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