Miniature synchronous infrared correlation device

Abstract

The invention provides a miniature synchronous infrared correlation device, and relates to the field of infrared sensing. The miniature synchronous infrared correlation device comprises a transmitting module and a receiving module, the transmitting module comprises a miniature infrared transmitter, a signal modulation circuit and a power management circuit, and the miniature infrared transmitter is used for transmitting infrared signals. According to the miniature synchronous infrared correlation device, the patch infrared lamp beads are adopted, the size is small, installation and hiding are convenient, the miniature synchronous infrared correlation device is suitable for various narrow spaces, an infrared scanning mode is adopted, only one pair of infrared receiving and transmitting work is conducted at the same time, the power consumption is 1 / N of that of conventional infrared, the power consumption is low, the service life of equipment is prolonged, and the maintenance cost is reduced; the design of a synchronous circuit improves the stability and reliability of signal transmission and reduces the false alarm rate, an infrared transmitting and receiving window adopts an infrared light transmitting material, the influence of external environment light is reduced, a signal amplification circuit and AD sampling are digitized, detection counting of tiny objects is facilitated, and a counting alarm threshold value is dynamically modified.

Description

Technical Field

[0001] The present invention relates to the field of infrared sensing technology, in particular to a miniature synchronous infrared emitting device. Background Art

[0002] Infrared beamers are a common security device, widely used in perimeter defense and intrusion detection scenarios. However, existing infrared beamers are typically large, difficult to install, and consume high power. Therefore, developing a small, low-power, and stable miniature synchronous infrared beamer is of great significance. Summary of the Invention

[0003] The purpose of the present invention is to provide a miniature synchronous infrared irradiation device to solve the problems raised in the above background technology.

[0004] Technical Solution

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A miniature synchronous infrared radiation device, including a transmitting module and a receiving module, wherein the transmitting module includes a miniature infrared transmitter, a signal modulation circuit and a power management circuit. The miniature infrared transmitter is used to transmit infrared signals, and the signal modulation circuit modulates the transmitted infrared signal to improve the anti-interference ability. The power management circuit is responsible for providing a stable power supply for the transmitting module and realizing low power consumption control. The receiving module includes a miniature infrared receiver, a signal demodulation circuit, an amplification circuit and a microprocessor. The miniature infrared receiver is used to receive the infrared signal emitted by the transmitting module, the signal demodulation circuit demodulates the received signal, the amplification circuit amplifies the demodulated signal, and the microprocessor processes the amplified signal to determine whether an abnormal situation such as occlusion occurs. The transmitting module and the receiving module work synchronously through the synchronization circuit to ensure the accurate transmission and reception of the infrared signal.

[0006] Furthermore, only one group of the infrared tubes is working, and the power is 1 / N of that of the infrared tubes working simultaneously. If it is modified so that several groups work simultaneously, it is also within the scope of protection of the rights.

[0007] Furthermore, the synchronization signal is interrupted regularly, and the timing error is less than ±10μs.

[0008] Furthermore, the infrared emitting and receiving windows are made of plastic material that is only infrared-transmissive.

[0009] Furthermore, the infrared emission and reception signals are subjected to an amplification circuit and AD sampling, so as to be easily processed by a digital algorithm.

[0010] Furthermore, the microprocessor integrates an ambient light compensation algorithm to automatically adjust the threshold according to the received signal strength.

[0011] The present invention provides a miniature synchronous infrared irradiation device. It has the following beneficial effects:

[0012] This miniature synchronous infrared beam-shooting device uses patch infrared lamp beads, which are compact and easy to install and hide. It is suitable for various narrow spaces. It adopts infrared scanning mode, and only one pair of infrared transmitters and receivers works at the same time, which is 1 / N of the conventional infrared power consumption. The low-power design extends the service life of the equipment and reduces maintenance costs. The synchronous circuit design improves the stability and reliability of signal transmission and reduces the false alarm rate. The infrared emission and receiving windows are made of infrared-transmitting materials to reduce the influence of external ambient light. The signal amplification circuit and AD sampling are digitalized to facilitate the detection and counting of tiny objects and dynamically modify the counting alarm threshold. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the infrared radiation structure of the present invention;

[0014] Figure 2 This is a schematic diagram of synchronous infrared emission of the present invention;

[0015] Figure 3 This is a schematic diagram of synchronous infrared reception of the present invention;

[0016] Figure 4 This is a schematic diagram of receiving signal amplification of the present invention;

[0017] Figure 5 This is a schematic diagram of MCU processing of the present invention. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] like Figure 1-5 As shown, an embodiment of the present invention provides a miniature synchronous infrared radiation device, including a transmitting module and a receiving module, the transmitting module includes a miniature infrared transmitting unit and a synchronization circuit; the receiving module includes a miniature infrared receiving unit, a synchronization circuit, a signal amplification unit and a microprocessor; the transmitting module and the receiving module achieve timing coordination through a synchronization signal.

[0020] Only one group of infrared tubes is working, and the power is 1 / N of that of the two groups working simultaneously. If it is modified to have several groups working simultaneously, it is also within the scope of copyright protection. The synchronization signal is interrupted regularly, and the timing error is less than ±10μs. The infrared emission and infrared receiving windows are made of plastic material that only transmits infrared. The infrared emission and reception signals are amplified by the circuit and AD sampling, which is convenient for digital algorithm processing. The microprocessor integrates the ambient light compensation algorithm and automatically adjusts the threshold according to the strength of the received signal.

[0021] Reference Figures 1 to 4 The miniature synchronous infrared radiator device shown includes infrared emission, infrared reception, signal amplification and MCU processing.

[0022] Figure 2 For synchronous infrared emission, DA DB DC EN are the synchronization signals. You can select the Y0 Y1 Y2Y3 Y4 Y5Y6 Y7 Y8 pins of the chip to output a low level, and the corresponding infrared tube will be turned on and emit infrared light;

[0023] Figure 3 To synchronize infrared reception, Figure 1 Under the synchronization signal, the corresponding Figure 2 The infrared receiving tube signal of the same group (one of Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 is synchronized) is turned on and output to the ADIN signal of pin 3. The size of the signal is related to the size of the obstacle in the infrared transmitting and infrared receiving channels;

[0024] Figure 4 for Figure 3 The output signal ADIN is amplified, and the amplification factor is adjusted by R1 / R2;

[0025] Figure 4 This is the MCU processing part. The synchronization signals DA DB DC EN are generated by it, which can control the scanning cycle. The corresponding infrared receiving tube signal is amplified and then sampled by the AD of the MCU. It is compared with the set threshold and outputs the alarm signal OUT.

[0026] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A miniature synchronous infrared radiation device, comprising a transmitting module and a receiving module, characterized in that: The transmitting module includes a micro infrared transmitting unit and a synchronization circuit; the receiving module includes a micro infrared receiving unit, a synchronization circuit, a signal amplifying unit and a microprocessor; the transmitting module and the receiving module achieve timing coordination through a synchronization signal.

2. The miniature synchronous infrared radiation device according to claim 1, characterized in that: Only one group of infrared tubes is working, and the power is 1 / N of that of the infrared tubes working simultaneously. If it is modified to have several groups working simultaneously, it is also within the scope of copyright protection.

3. The miniature synchronous infrared radiation device according to claim 1, characterized in that: The synchronization signal is interrupted regularly, and the timing error is less than ±10μs.

4. The miniature synchronous infrared radiation device according to claim 1, characterized in that: The infrared emitting and receiving windows are made of plastic material that is only infrared-transmissive.

5. The miniature synchronous infrared radiation device according to claim 1, characterized in that: The infrared emission and reception signals are processed by an amplifying circuit and AD sampling, so as to be easily processed by a digital algorithm.

6. The miniature synchronous infrared radiation device according to claim 1, characterized in that: The microprocessor integrates an ambient light compensation algorithm and automatically adjusts the threshold according to the received signal strength.

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