CN102359952A - Contact photoelectric sensor for identifying front and back of bamboo filament - Google Patents

Abstract

The invention discloses a contact photoelectric sensor for identifying the front and back of bamboo silk, which includes a left sensor and a right sensor. The left sensor or the right sensor includes a base body, several groups of identification units and a circuit board. The identification unit includes a pair of photoelectric emitting devices and photoelectric receiving devices. The photoelectric emitting devices and photoelectric receiving devices are respectively electrically connected to the circuit board. The bamboo wire is sandwiched between the left sensor and the right sensor. The sensor can be installed to detect and compare the front and back surfaces of bamboo silk at the same time. Multiple groups of photoelectric identification units can expand the detection range to meet the detection requirements of bamboo silk with different widths. The light board can improve the sensitivity and accuracy of photoelectric reception, and prevent other external light sources from interfering with the receiving device.

Description

A contact photoelectric sensor for identifying the front and back of bamboo silk

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technical field

The invention relates to the sensing field, in particular to a contact photoelectric sensor capable of accurately identifying the front and back sides of bamboo silk.

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Background technique

As a green and environmental protection product, bamboo weaving products have been widely used. As the raw material of bamboo weaving products, it is difficult to correctly and quickly judge the front and back of bamboo silk when it is put into mechanical weaving. Generally, the front of bamboo silk is a flat plane. , the two edges are at right angles, while the two edges on the opposite side of the bamboo filaments are generally arc-shaped, and some bamboo filaments have grooves on the reverse side, and different bamboo filaments have different widths, which brings some inconvenience to the detection. Manual operation is used to judge the front and back of bamboo silk by touching the surface of bamboo silk with human hands. The labor intensity is high and the accuracy rate is low, and workers are prone to fatigue, which reduces product quality and output; photoelectric sensors are used as modern industrial electromechanical An important detection component in the integrated equipment, widely used in the fields of position positioning, color recognition and material analysis, through the reception and analysis of the reflected light on the surface of the object by the photoelectric device, the object can be positioned, identified and analyzed, such as the Chinese patent No. CN03148993.1, the invention patent titled reflective sensor, filter plate and detected object detection method, the reflective sensor is used to detect whether there is a detected object at the detection position, has a sensing part and a filter plate, The sensing part has a light emitting element that irradiates light to the detection position and a light receiving element that receives the reflected light reflected from the object to be detected and generates an electrical signal corresponding to the amount of received light. The filter plate is arranged between the sensing part and the detection position, and the It is made of a light-transmitting material that can transmit the light irradiated from the light-emitting element to the above-mentioned detection position and the reflected light reflected from the object to be detected at the detection position to the light-receiving element, and can prevent dust from entering the sensing part. The filter plate The surface on the side of the sensing part is formed to have a first inclined surface facing the light emitting element, a second inclined surface facing the light receiving element, and a ridge line formed at the intersection of the first and second inclined surfaces. Conical, the above-mentioned ridge line extends between the light-emitting element and the light-receiving element. In certain occasions, the reflective sensor can detect the characteristics of the detected object more accurately; , due to the greater interference by external light and the different widths of the bamboo filaments, the recognition accuracy is low, which cannot meet the requirements for the detection of the front and back of the bamboo filaments.

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Contents of the invention

The present invention mainly solves the problem of manual identification of the front and back of bamboo silk, which is labor-intensive, low in accuracy and low in output.

At the same time, it solves the shortcomings of ordinary reflective sensors that are greatly disturbed by external light and cannot meet the detection requirements of bamboo filaments of different widths; it provides a method to quickly judge the front and back of bamboo filaments through multiple sets of photoelectric sensors, and meet the needs of mechanized mass production. The required contact photoelectric sensor for identification of the front and back of bamboo filaments.

In order to solve the above-mentioned technical problems that exist, the present invention mainly adopts the following technical solutions:

A contact photoelectric sensor for identifying the front and back of bamboo silk according to the present invention includes a left sensor and a right sensor. The left sensor or the right sensor includes a base body, several groups of identification units and a circuit board. The base body is made of opaque material. Each group of identification units includes a pair of photoelectric emitting devices and photoelectric receiving devices, the photoelectric emitting devices and photoelectric receiving devices are respectively electrically connected to the circuit board, the bamboo wire is arranged between the left sensor and the right sensor, the bamboo wire is The left and right sensors arranged symmetrically on the opposite side can detect and compare the front and back surfaces of the bamboo silk at the same time, effectively distinguishing the front and back sides of the bamboo silk. The substrate made of materials reduces the influence of external light and improves the sensitivity and accuracy of optoelectronic devices.

Preferably, the base body of the left sensor and the base body of the right sensor have the same structure and are bilaterally symmetrical, and can simultaneously detect the front and back surfaces of the bamboo thread clamped between the left and right sensors.

As a preference, several guide columns and positioning holes are respectively arranged on the base body, and the guide columns and positioning holes are all arranged on the same side of the base body, the guide columns of the left sensor coincide with the corresponding positioning holes of the right sensor, and the right sensor The guide post of the left sensor matches the corresponding positioning hole of the left sensor, the guide post of the left sensor is set in the positioning hole of the right sensor and can slide along the positioning hole, the guide post of the right sensor is set in the corresponding positioning hole of the left sensor and can slide along the The positioning hole slides left and right, and through the cooperation of the guide column and the positioning hole, the left sensor or the right sensor can slide conveniently, meeting the requirements of fast clamping and positioning of the bamboo wire.

As a preference, the left sensor is provided with three groups of identification units, and the right sensor is also provided with three groups of identification units, and the circuit board is arranged on the back of the corresponding substrate, and multiple groups of identification units can cover a wider identification area, adapting to Testing requirements for bamboo filaments of different widths.

Preferably, the base body is in the shape of a cuboid, and three groups of identification unit mounting holes are provided on the base body, each group of identification unit mounting holes includes a pair of emitting device mounting holes and receiving device mounting holes, and a photoelectric emitting device is arranged in the mounting hole of the emitting device device, the receiving device installation hole is provided with a photoelectric receiving device, the front of the substrate between the transmitting device installation hole and the receiving device installation hole is provided with a light-through groove, and the end of the light-through groove near the receiving device installation hole is provided with a light baffle plate, The horizontal centerlines of the mounting holes of the three sets of identification units are all parallel to each other and the long side of the substrate, and the distances between the horizontal centerlines of the three sets of identification unit mounting holes and the long side of one side of the substrate are not equal, each The light emitted by the photoelectric emitting device of the group identification unit changes the receiving amount of the photoelectric receiving device through the reflection of the light groove and the surface of the bamboo thread and the blocking of the light baffle, and then determines the front and back of the bamboo thread, and the parallelism of multiple groups of identification units. Setting, expanding the detection range of the sensor, can detect the surface edge of wider bamboo wires at the same time, and adapt to the detection requirements of different widths of bamboo wires.

Preferably, the installation hole of the photoelectric emitting device is square, the installation hole of the photoelectric receiving device is a round hole, the light-through groove is rectangular, and the installation hole coincides with the photoelectric device, so that the installation of the photoelectric device is more firm and convenient.

Preferably, the guide column is in the shape of a cuboid, the guide column is perpendicular to the front of the substrate, and the inner sides where the guide column intersects with the front of the substrate are all on the same straight line, the straight line is parallel to the long side of the substrate, and the positioning hole is a rectangular through hole. Holes, linear arrangement of guide columns make the positioning of bamboo filaments more accurate, and the cuboid guide columns can be used as right-angle stoppers for bamboo filament detection to ensure accurate positioning of bamboo filaments and prevent detection errors.

Preferably, a transparent sealant is provided between the four walls of the installation hole of the emitting device and the photoelectric emitting device, and a transparent sealant is provided between the four walls of the installation hole of the receiving device and the photoelectric receiving device, and the photoelectric device is directly bonded In the corresponding mounting holes, it is firmly fixed and can prevent the influence of moisture.

Preferably, the circuit board is provided with a signal processing circuit, a signal comparison circuit and a sensor interface, the sensor interface is electrically connected to an external controller, and the signal processing circuit includes a fine-tuning circuit signal filter set for inconsistency of components circuit, decoupling circuit, etc., the signal comparison circuit is used to control the opening and judgment of the photoelectric device, and all signal output and power supply are connected to the controller through the sensor interface.

The beneficial effects of the present invention are: the left and right sensors arranged symmetrically can detect and compare the front and back surfaces of the bamboo filaments at the same time, and multiple groups of photoelectric identification units can expand the detection range, sampling at multiple positions on the width of the bamboo filaments to meet the requirements of different bamboo filaments. According to the detection requirements of the width of bamboo wire, a light slot and a light baffle are set between the photoelectric emitting device and the receiving device, which can improve the accuracy of photoelectric reception and prevent other external light sources from interfering with the receiving device.

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Description of drawings

Fig. 1 is the outline schematic diagram of sensor of the present invention;

Fig. 2 is a schematic diagram when the sensor of the present invention is separated;

Fig. 3 is a kind of structural representation of left sensor;

Fig. 4 is the optical path schematic diagram of bamboo silk front detection of the present invention;

Fig. 5 is the optical path schematic diagram that the bamboo silk back side of the present invention detects;

Fig. 6 is another structural schematic diagram of the left sensor;

In the figure 1. Left sensor, 2. Right sensor, 3. Substrate, 4. Circuit board, 5. Photoelectric transmitting device, 6. Photoelectric receiving device, 7. Mounting hole for transmitting device, 8. Mounting hole for receiving device, 9. Pass Light groove, 10. Light baffle plate, 11. Guide post, 12. Positioning hole, 13. Sensor interface, 14. Bamboo wire.

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Detailed ways

The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Embodiment 1: A contact photoelectric sensor for identifying the front and back of bamboo silk in this embodiment 1, as shown in Figure 1 and Figure 2, includes a left sensor and a right sensor, and the left sensor or the right sensor includes a substrate, three groups of identification units and The circuit board, as shown in Figure 3, each group of identification units includes a pair of photoelectric emitting devices and photoelectric receiving devices, the photoelectric emitting devices and photoelectric receiving devices are respectively electrically connected to the circuit board, the left sensor and the right sensor have the same structure and are mirror-symmetrical on the left and right sides , the circuit board is installed on the back of the substrate, which has the same shape as the substrate. The sensor interface, signal processing and control modules are installed on the circuit board, and the sensor interface is connected to the external power supply, input and output signals; the substrate is rectangular and made of opaque materials. , There are three groups of identification unit mounting holes designed on the substrate, each group of identification unit mounting holes includes a pair of transmitting device mounting holes and receiving device mounting holes, a photoelectric transmitting device is installed in the square transmitting device mounting hole, and a circular receiving device is installed The photoelectric receiving device is installed in the hole, and the mounting hole is filled with transparent sealant. There is a rectangular light-passing groove on the front of the substrate between the mounting hole of the transmitting device and the mounting hole of the receiving device. The end of the light-passing groove close to the mounting hole of the receiving device is designed with a One light baffle, the horizontal centerlines of the mounting holes of the three groups of identification units are parallel to each other and the long side of the substrate, the distances between the horizontal centerlines of the mounting holes of the three groups of identification units and the long side of the substrate are not equal; the outer surfaces of the substrate are respectively There are three cuboid guide columns and three rectangular positioning holes. The guide columns and the positioning holes are on the same side of the substrate. The guide columns are perpendicular to the front of the substrate. The straight line is parallel to the long side of the substrate, the three guide posts of the left sensor coincide with the three positioning holes corresponding to the right sensor, the three guide posts of the right sensor coincide with the three positioning holes corresponding to the left sensor, and the guide posts of the left sensor coincide with the three positioning holes corresponding to the left sensor. The column can slide along the positioning hole corresponding to the right sensor, and the guide column of the right sensor can slide along the positioning hole corresponding to the left sensor; when the sensor is working, first slide the guide column of the left sensor through the positioning hole of the right sensor to separate the left and right sensors. The bamboo thread to be detected is sent between the left and right sensors. One side of the bamboo thread is close to the guide column and is attached to the guide column. Then the left and right sensors are clamped to compress the bamboo thread. The photoelectric emitting device works and emits detection light, as shown in Figure 4 and Figure 5, the detection light passes through the light groove and the surface of the bamboo wire and enters the installation hole of the receiving device through the light baffle, the photoelectric receiving device receives the reflected light, and compares the light on the left and right sensors The amount of light reflected at the same position is processed and judged, and the front and back of the bamboo filament can be accurately detected.

Embodiment 2: A contact photoelectric sensor for identifying the front and back of bamboo silk in this embodiment 2 includes a left sensor and a right sensor, and the left sensor or the right sensor includes a substrate, two groups of identification units and a circuit board, as shown in Figure 6 , each group of identification units includes a pair of photoelectric emitting devices and photoelectric receiving devices, the photoelectric emitting devices and photoelectric receiving devices are respectively electrically connected to the circuit board, the other parts of this embodiment are similar to the corresponding parts of embodiment 1, and will not repeat.

The above descriptions do not limit the present invention, and the present invention is not limited to the examples described above. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention should be regarded as the present invention. Scope of protection of the invention

Claims (9)

1. identification bamboo silk pros and cons contact photoelectric sensor; It is characterized in that: comprise left sensor (1) and right sensor (2); Said left sensor or right sensor comprise matrix (3), some groups of identification units and circuit board (4); Said matrix (3) is processed for light-proof material; Said every group of identification unit comprises a pair of photoemissive device (5) and photoelectric receiving device (6), and said photoemissive device and photoelectric receiving device are electrically connected with said circuit board respectively, and bamboo silk (14) is located between left sensor and the right sensor.

2. a kind of identification bamboo silk pros and cons contact photoelectric sensor according to claim 1 is characterized in that: the identical and left-right symmetric of basal body structure of the matrix of said left sensor (1) and right sensor (2).

3. a kind of identification bamboo silk pros and cons contact photoelectric sensor according to claim 1 and 2; It is characterized in that: be respectively equipped with some guideposts (11) and pilot hole (12) on the said matrix (3); Said guidepost and pilot hole all are located at the same side of matrix; The guidepost and right sensor (2) corresponding positioning hole of left side sensor (1) match; The guidepost and the left sensor corresponding positioning hole of right sensor match, and the guidepost of left sensor is located in the corresponding pilot hole of right sensor, and the guidepost of right sensor is located in the corresponding pilot hole of left sensor.

4. a kind of identification bamboo silk pros and cons contact photoelectric sensor according to claim 1; It is characterized in that: said left sensor (1) is provided with three groups of identification units; Also be provided with three groups of identification units on the said right sensor (2), said circuit board (4) is located at the back side of corresponding matrix (3).

5. a kind of identification bamboo silk pros and cons contact photoelectric sensor according to claim 4; It is characterized in that: said matrix (3) is rectangular parallelepiped; Matrix is provided with the mounting hole of three groups of identification units; Every group of identification unit mounting hole comprises a pair of ballistic device mounting hole (7) and receiving device mounting hole (8); Be provided with photoemissive device (5) in the said ballistic device mounting hole; Be provided with photoelectric receiving device (6) in the said receiving device mounting hole, the matrix front between ballistic device mounting hole and the receiving device mounting hole also is provided with logical light groove (9), and logical light groove is provided with light barrier (10) near an end of receiving device mounting hole; The horizontal center line of said three groups of identification unit mounting holes is parallel mutually and be parallel to the long side of matrix, and the distance of the horizontal center line of said three groups of identification unit mounting holes and matrix one side long side does not wait.

6. a kind of identification bamboo silk pros and cons contact photoelectric sensor according to claim 5 is characterized in that: said ballistic device mounting hole (7) is square, and said receiving device mounting hole (8) is a circular hole, and said logical light groove (9) is rectangle.

7. a kind of identification bamboo silk pros and cons contact photoelectric sensor according to claim 3; It is characterized in that: said guidepost (11) is rectangular parallelepiped; Guidepost is perpendicular to the front of matrix (3); The positive inner side edge that intersects of guidepost and matrix all is on the same straight line, and said straight line parallel is in the long side of matrix, and said pilot hole (12) is a rectangular through holes.

8. according to claim 5 or 6 described a kind of identification bamboo silk pros and cons contact photoelectric sensors; It is characterized in that: be provided with transparent sealing glue between the wall of said ballistic device mounting hole (7) and the photoemissive device (5), be provided with transparent sealing glue between the wall of said receiving device mounting hole (8) and the photoelectric receiving device (6).

9. according to claim 1 or 4 described a kind of identification bamboo silk pros and cons contact photoelectric sensors; It is characterized in that: said circuit board (4) is provided with signal conditioning circuit, signals comparator and sensor interface (13), and said sensor interface is electrically connected with peripheral control unit.

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