CN214623036U

CN214623036U - Photoelectric sensing device for detecting transparent object

Info

Publication number: CN214623036U
Application number: CN202120346413.0U
Authority: CN
Inventors: 唐小禄
Original assignee: Shenzhen Raun Technology Co ltd
Current assignee: Shenzhen Raun Technology Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-05
Anticipated expiration: 2031-02-05

Abstract

The utility model discloses a transparent object detects photoelectric sensing device, including microcontroller, time of flight sensor, detection distance module and signal output circuit, detection distance module is connected with microcontroller, microcontroller and time of flight sensor both way junction, time of flight sensor is used for transmitting optical signal to the target that waits to detect, and receives the optical signal from the target reflection that waits to detect, microcontroller's output and signal output circuit are connected. The utility model discloses the testing result only is relevant with the detection distance, and is irrelevant with object surface colour and reflection of light rate, has changed the low problem of ordinary traditional photoelectric sensor detection transparent object success rate.

Description

Photoelectric sensing device for detecting transparent object

Technical Field

The utility model relates to a sensor field especially relates to a transparent object detects photoelectric sensing device.

Background

The photoelectric sensor is not easily influenced by the physical properties of a detected object due to non-contact property and high response speed, and has wider and wider application range in the industrial production process. The mainstream design of the existing optical sensor on the market is to adopt the photoelectric switch sensor principle, and the sensor of the type depends on the reflectivity of a target, and if the target is a transparent object, the reflectivity is particularly low, and the detection success rate is also particularly low.

Accordingly, the prior art is deficient and needs improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: a photoelectric sensing device for detecting a transparent object is provided to solve the above technical problems.

The technical scheme of the utility model as follows: the utility model provides a detection photoelectric sensing device for transparent object, includes microcontroller, time of flight sensor, detection distance module and signal output circuit, detection distance module is connected with microcontroller, microcontroller and time of flight sensor both way junction, the time of flight sensor is used for transmitting optical signal to the target that awaits measuring, and the optical signal of receiving from the target reflection that awaits measuring, microcontroller's output and signal output circuit are connected.

By adopting the technical scheme, in the photoelectric sensing device for detecting the transparent object, the type of the microcontroller is STC8G1K 08.

By adopting the technical scheme, in the photoelectric sensing device for detecting the transparent object, the microcontroller is provided with a control circuit.

With the above technical solutions, in the photoelectric sensing apparatus for detecting a transparent object, the model of the time-of-flight sensor is VL53L 0X.

By adopting the technical scheme, in the photoelectric sensing device for detecting the transparent object, the flight time sensor is provided with a flight time circuit.

By adopting the above technical solutions, in the photoelectric sensing device for detecting a transparent object, the signal output circuit is an NPN signal output.

By adopting the technical schemes, in the photoelectric sensing device for detecting the transparent object, the signal output circuit is a PNP signal output circuit.

Adopt above-mentioned each technical scheme, the utility model discloses the testing result only is relevant with the detection distance, and is irrelevant with object surface colour and reflection of light rate, has changed the problem that ordinary traditional photoelectric sensor detects transparent object success rate low.

Drawings

Fig. 1 is a schematic view of a connection module of the present invention;

fig. 2 is a schematic diagram of a control circuit of the microcontroller according to the present invention;

fig. 3 is a schematic view of the time-of-flight circuit of the time-of-flight sensor of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the present embodiment provides a transparent object detection photoelectric sensing apparatus, which includes a microcontroller 2, a time-of-flight sensor 3, a distance detection module 5, and a signal output circuit 1. The distance detection module 5 may be configured as a specific key, and set the current measurement distance as the detection distance through the key. Of course, the setting may be performed by other methods such as writing a code in the microcontroller 2 in advance or serial communication, and is not limited to be performed only by a key.

The distance detection module 5 is connected with the microcontroller 2, the microcontroller 2 is bidirectionally connected with the time-of-flight sensor 3, the time-of-flight sensor 3 is used for transmitting a light signal to a target to be detected and receiving a light signal reflected from the target to be detected, and the time from reflection to reception of the light is measured as the time-of-flight. The microcontroller 2 calculates the measuring distance according to the flight time measured by the flight time sensor 3, and the output end of the microcontroller 2 is connected with the signal output circuit 1. When no transparent object is shielded, the measured distance is different from the distance shielded by the transparent object, and the microcontroller 2 outputs different high and low levels according to the distance.

Fig. 2 shows a microcontroller 2 and its peripheral control circuit. The microcontroller 2 is an STC8G1K08 of the domestic STC company, an STC8G series single chip microcomputer does not need an external crystal oscillator and external reset, an 8051 kernel single chip microcomputer which aims at ultra-strong anti-interference, ultra-low price, high speed and low power consumption is adopted, and the STC8G series single chip microcomputer is about 12 times faster than the traditional 8051 single chip microcomputer under the same working frequency. And the FLASH space with maximum 12 kbytes is used for storing user codes. The EEPROM size is supported to be configured by a user, 512 bytes are erased in a single page, the erasing frequency can reach more than 10 ten thousand times, and 1280 bytes of RAM is expanded internally.

As shown in fig. 3, the time-of-flight sensor 3 is provided with a time-of-flight circuit. The time-of-flight sensor 3 is VL53L0X from ST corporation, a new generation of time-of-flight laser ranging module (unlike conventional technology) that provides accurate distance measurement regardless of target reflectivity. VL53L0X incorporates a leading SPAD array (single photon avalanche diode), ST embedded second generation Flight Sense patent technology. The 940nm VCSEL emitter (vertical cavity surface emitting laser) of VL53L0X is completely invisible to human eyes, and a built-in physical infrared filter is added, so that the distance measurement distance is longer, the immunity to ambient light is stronger, and the stability to optical crosstalk of a cover plate is better.

In the above technical solution, the signal output circuit 1 is an NPN signal output or the signal output circuit 1 is a PNP signal output.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The device for detecting the photoelectric sensor by the transparent object is characterized by comprising a microcontroller, a time-of-flight sensor, a detection distance module and a signal output circuit, wherein the detection distance module is connected with the microcontroller, the microcontroller is bidirectionally connected with the time-of-flight sensor, the time-of-flight sensor is used for transmitting a light signal to a target to be detected and receiving a light signal reflected from the target to be detected, and the output end of the microcontroller is connected with the signal output circuit.

2. The transparency detection photoelectric sensor apparatus of claim 1, wherein the microcontroller type is STC8G1K 08.

3. The transparency detection photoelectric sensing apparatus according to claim 2, wherein the microcontroller is provided with a control circuit.

4. The transparency detection photoelectric sensor apparatus of claim 1, wherein the time-of-flight sensor model is VL53L 0X.

5. The transparency according to claim 4 wherein the time-of-flight sensor is provided with a time-of-flight circuit.

6. The transparency detection photoelectric sensing apparatus according to claim 1, wherein the signal output circuit is an NPN signal output.

7. The transparency detection photoelectric sensor apparatus according to claim 1, wherein the signal output circuit is a PNP signal output.