An anti-interference infrared signal control device

Abstract

The present invention relates to an anti-interference infrared signal control device, which has an infrared signal transmitter and an infrared signal receiver corresponding to the signal transmitter, wherein the infrared signal transmitter is used to transmit a first control signal to the infrared signal receiver, and the infrared signal receiver has a signal detection unit, which is used to detect whether the first control signal meets a preset threshold value, wherein the first control signal includes a plurality of low-level signals and a high-level signal spaced from the low-level signal, wherein the time period of each high-level signal is longer than the time period of the low-level signal, and the preset threshold value of the signal detection unit matches the first control signal. By transmitting the first control signal and the preset identification rules of the signal detection unit to identify useful signals and discard useless signals, the abnormal detection actions of the switch stage of high-power heating lamps such as bathroom heaters and the transmission stage of infrared remote controllers in the home environment are effectively avoided.

Description

Technical Field

[0001] The invention relates to the field of signal control, in particular to an anti-interference infrared signal control device. Background Art

[0002] Many infrared sensing products on the market today use forward-beam or reflective self-transmitting and receiving infrared sensing circuits, but many products have poor anti-interference capabilities against external infrared signals, especially during the switching stage of high-power heating lamps such as bathroom heaters and the transmission stage of infrared remote controls, which can easily cause the product to have no induction.

[0003] The aim is to use special transmission coding and receiving methods to achieve interference suppression in the switching stage of high-power heating lamps such as bathroom heaters and the transmission stage of infrared remote controls to avoid product malfunctions. Summary of the invention

[0004] Based on this, it is necessary to provide an anti-interference infrared signal control device to address the problem that the above-mentioned infrared signal is susceptible to interference.

[0005] An anti-interference infrared signal control device comprises an infrared signal transmitter and an infrared signal receiver corresponding to the signal transmitter, characterized in that the infrared signal transmitter is used to transmit a first control signal to the infrared signal receiver, the infrared signal receiver has a signal detection unit, used to detect whether the first control signal meets a preset threshold, the first control signal comprises a plurality of low-level signals and high-level signals spaced from the low-level signals, the time period of each high-level signal is longer than the time period of the low-level signal, and the preset threshold of the signal detection unit matches the first control signal.

[0006] In one preferred embodiment, the first control signal includes three low-level signals and two high-level signals.

[0007] In one preferred implementation manner, the duration of the high-level signal is a multiple of the duration of the low-level signal.

[0008] In one preferred implementation manner, the duration of the high level signal is 300 us, and the duration of the low level signal is 100 us.

[0009] In one preferred implementation manner, the duration of the continuous high-level signal is not less than 400 us.

[0010] In one preferred embodiment, the encoding method of the first control signal emitted by the infrared signal transmitter includes NEC, upd6121, RC-5, RC-6, RC-7 or RC-199.

[0011] In one preferred implementation manner, the high and low levels of the first control signal are distributed in a manner of 01010, where "0" represents a low level and "1" represents a high level.

[0012] An anti-interference infrared signal control device in the above-mentioned embodiment of the present invention identifies useful signals and discards useless signals by transmitting a first control signal and a preset identification rule of a signal detection unit, thereby effectively avoiding abnormal detection actions during the switching stage of high-power heating lamps such as bathroom heaters in a home environment and the transmission stage of infrared remote controls. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of an anti-interference infrared signal control device in a preferred embodiment of the present invention;

[0014] Figure 2 A waveform diagram of a first control signal of an anti-interference infrared signal control device in a preferred embodiment of the present invention;

[0015] Figure 3 The figure is a schematic diagram of detection waveforms of a signal detection unit of an anti-interference infrared signal control device in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0019] like Figure 1As shown, a preferred embodiment of the present invention discloses an anti-interference infrared signal control device 100, which has an infrared signal transmitter 110 and an infrared signal receiver 120 corresponding to the signal transmitter 110, the infrared signal transmitter 110 is used to transmit a first control signal to the infrared signal receiver 120, the infrared signal receiver 120 has a signal detection unit, which is used to detect whether the first control signal meets a preset threshold, the first control signal includes a plurality of low-level signals and high-level signals spaced from the low-level signals, wherein the time period of each high-level signal is longer than the time period of the low-level signal, and the preset threshold of the signal detection unit matches the first control signal.

[0020] Combination Figure 2 As shown, the first control signal in this embodiment includes three low-level signals and two high-level signals. The duration of the high-level signal is a multiple of the duration of the low-level signal.

[0021] Specifically, the duration of the high level signal is 300us, the duration of the low level signal is 100us, and the distribution of high and low levels of the first control signal is 01010, where "0" represents a low level and no signal is transmitted, and "1" represents a high level.

[0022] In this implementation manner, the encoding method of the first control signal emitted by the infrared signal transmitter includes NEC, upd6121, RC-5, RC-6, RC-7 or RC-199.

[0023] Combination Figure 3 As shown, the infrared signal receiver 120 receives the first control signal, and the signal detection unit detects the first control signal. The preset threshold of the signal detection unit matches the first control signal.

[0024] In this implementation manner, the distribution of the high and low levels of the first control signal is "01010", the duration of the high level signal is 300us, and the duration of the low level signal is 100us, which matches the first control signal. Figure 3As shown, the distribution of high and low levels detected by the preset threshold set by the above-mentioned signal detection unit is also "01010", the duration of detecting the high level signal is also 300us, and the duration of detecting the low level signal is also 100us. When the first control signal detected by the signal detection unit completely meets the preset threshold, the signal detection unit determines that the first control signal is not interfered with by the signal, and the signal receiver can receive the signal. If the first control signal detected by the signal detection unit does not completely meet the preset threshold, the signal detection unit determines that the first control signal is interfered with by the signal, and the signal receiver will not receive the first control signal of this time period. When the signal transmitter transmits the first control signal of the second period, the signal detection unit re-detects the first control signal.

[0025] Specifically, the duration of the continuous high-level signal is not less than 400 us.

[0026] In this embodiment, the above-mentioned anti-interference infrared signal control device 100 can perform anti-interference processing on infrared radiation interference signals generated by interference sources such as household bathroom heaters and incandescent lamps. This mainly occurs when the filaments of bathroom heaters and incandescent lamps change from cold to hot and from hot to cold. The infrared signal will only have a peak or a process from weak to strong and from strong to weak, with no interval in between. The first control signal emitted by the signal transmitter 110 in this embodiment and the signal detection unit of the signal receiver 120 can cooperate in detecting the first control signal and can identify and respond to infrared interference signals emitted by bathroom heaters, incandescent lamps, etc.

[0027] An anti-interference infrared signal control device in the above-mentioned embodiment of the present invention identifies useful signals and discards useless signals by transmitting a first control signal and a preset identification rule of a signal detection unit, thereby effectively avoiding abnormal detection actions during the switching stage of high-power heating lamps such as bathroom heaters in a home environment and the transmission stage of infrared remote controls.

[0028] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0029] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An anti-interference infrared signal control device, comprising an infrared signal transmitter and an infrared signal receiver corresponding to the signal transmitter, characterized in that: The infrared signal transmitter is used to transmit a first control signal to the infrared signal receiver. The infrared signal receiver has a signal detection unit to detect whether the first control signal meets a preset threshold. The first control signal includes a plurality of low-level signals and high-level signals spaced from the low-level signals. The time period of each high-level signal is longer than the time period of the low-level signal. The preset threshold of the signal detection unit matches the first control signal. The first control signal includes three low-level signals and two high-level signals. The duration of the high-level signal is a multiple of the duration of the low-level signal. The duration of the high-level signal is 300us, the duration of the low-level signal is 100us, and the duration of the continuous high-level signal is not less than 400us. The encoding method of the first control signal emitted by the infrared signal transmitter includes NEC, upd6121, RC-5, RC-6, RC-7 or RC-199. The distribution method of high and low levels of the first control signal is 01010, where "0" represents a low level and "1" represents a high level.

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