Groove-type grating sensor
A grating sensor and sensor technology, applied in the field of photoelectric sensing, can solve the problems that the single-channel groove photoelectric sensor cannot distinguish the moving direction of objects, has poor anti-interference ability and anti-environmental light ability, and cannot filter the signal frequency, etc. The effect of controlling product performance, strong anti-interference ability, and controllable signal collection time
Inactive Publication Date: 2015-04-15
SHANGHAI LANBAO SENSING TECH
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Problems solved by technology
[0014] 1) In terms of function, first, in terms of detecting the directionality of objects, the single-channel groove photoelectric sensor cannot distinguish the moving direction of the object
Second, in terms of accurate positioning of objects, single-channel slot photoelectric sensors can only detect the presence or absence of objects
[0015] 2) From the circuit point of view, the conventional slot-type photoelectric sensor is realized by a digital analog circuit, which has poor integration and is easily affected by the environment
Its technical disadvantage is that it cannot distinguish the interference signal with high intensity, and cannot screen the frequency of the signal, and its anti-interference ability and anti-environmental light ability are poor.
When the product is used next to inverters, motors and other equipment, malfunctions will occur
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[0039] Such as Figure 4 As shown in the structural diagram, the present invention adopts a single-chip microcomputer design, including a power supply voltage stabilization module, a transmission drive module, a receiving module, an internal operational amplification module of the single-chip microcomputer, a comparator judgment module, signal detection, a filtering algorithm processing module, an indicator light display module and output module.
[0040] The function that dual-channel detection of the present invention realizes comprises:
[0041] First, the detection function of the moving direction of the object is realized. Such as Figure 5 As shown, the two channels can be detected independently. When the target passes through channel 1, LED1 lights up, and the black line has output; when the target passes through channel 2, LED2 lights up, and the white line has output. The moving direction can be judged according to the response sequence of channel 1 and channel 2; ...
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The invention discloses a groove-type grating sensor. The groove-type grating sensor comprises a U-shaped housing, wherein at least two pairs of light emitting and receiving tubes capable of forming two light paths are embedded in two symmetric end parts of the U-shaped housing; the mounting positions of the two pairs of light emitting and receiving tubes allow the two light paths to be arranged in the U-shaped surface direction perpendicular to the housing; the sensor comprises a power supply voltage stabilizing module, an emitting driving module, a receiving module, an indicator light display module, an output module and an MCU; the MCU further comprises an operational amplifying module, a comparator judging module, and a signal detection and filtering algorithm processing module. The groove-type grating sensor disclosed by the invention can realize double-channel detection of a groove-type photoelectric switch, can be used for detecting the object direction, and accurately limiting the position and positioning, and substitutes the original scheme realized by two or three sensors in the elevator industry, so that the cost can be reduced.
Description
technical field [0001] The invention belongs to the technical field of photoelectric sensing, in particular to a slot-type grating sensor. Background technique [0002] Groove grating sensor, or groove photoelectric sensor, groove photoelectric switch, U-shaped photoelectric switch. The principle is similar to a kind of through-beam photoelectric switch. It is an infrared sensor photoelectric product. It is composed of an infrared emitting tube and an infrared receiving tube. It uses light as the medium and receives and converts the infrared light between the light emitting body and the light receiving body. The slot width determines the strength of the induction receiving signal and the detection distance. [0003] In elevator equipment, such a slot-type photoelectric sensor is usually used to detect elevator leveling. In the prior art, such slot-type photoelectric sensors are all single-channel, and two or three such sensors are required to meet the requirements, which i...
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IPC IPC(8): G01D5/34
Inventor 谢勇祁伟光
Owner SHANGHAI LANBAO SENSING TECH