Operating-reliable photoelectric speed sensor

Abstract

The utility model discloses a photoelectric speed sensor capable of working reliably, and relates to the field of speed sensors. A photoelectric speed sensor capable of working reliably comprises a support plate, a photoelectric sensor, a photoelectric sensor, a photoelectric sensor and a power supply, wherein the support plate is provided with a T-shaped chute; the T-shaped plate is connected into the T-shaped sliding groove in a sliding mode; the shell is arranged right above the T-shaped plate; according to the utility model, the two friction rollers can be automatically moved to the offset side of the arc-shaped bulge of the belt together, so that the two friction rollers can be symmetrically distributed on the two sides of the arc-shaped bulge of the belt as far as possible, and the force applied to the two friction rollers by the belt is ensured to be the same; therefore, it is convenient to guarantee that the speed measuring gear can rotate more stably, the accuracy of the photoelectric speed sensor body during detection of the running speed of the belt is guaranteed, and the high reliability of data acquisition during working of the photoelectric speed sensor is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of speed sensors, and specifically relates to an optoelectronic speed sensor with reliable operation. Background Art

[0002] An electronic belt scale refers to an automatic weighing instrument that continuously weighs bulk materials on a conveyor belt without subdividing the mass or interrupting the movement of the conveyor belt. The electronic belt scale consists of a scale frame, a speed measurement sensor, a high-precision weighing sensor, an electronic belt scale control display instrument, etc., and can continuously and dynamically measure solid materials.

[0003] Among the speed measurement sensors of belt scales, the most commonly used is the optoelectronic speed sensor. The optoelectronic speed sensor consists of a light-emitting diode and a receiver, and senses the displacement of an object by emitting a light beam and detecting the degree of occlusion of the light beam. When an object passes through the sensor, the light beam will be occluded, causing a change in the light intensity received by the receiver. By measuring the change in light intensity, the displacement information of the object can be obtained, and its function is to measure the running speed of the belt on the belt scale.

[0004] However, the existing optoelectronic speed sensors used to measure the running speed of the belt on the belt scale usually consist of a mounting shell, two friction rollers in contact with the belt, a rotating shaft, a speed measurement gear, and an optoelectronic speed sensor body, etc. During installation, it is generally installed at a position directly below the belt on the scale frame. Thus, when the belt runs, the belt will drive the speed measurement gear to rotate through the friction rollers and the rotating shaft, and then the optoelectronic speed sensor body can detect the running speed of the belt according to the speed measurement gear. Although this kind of optoelectronic speed sensor can also detect the running speed of the belt, the accuracy is relatively low. When the goods are not located in the middle position of the belt, causing the arc-shaped bulge of the belt to protrude downward and shift and not be located at the center position, at this time, the pressures exerted on the two friction rollers by the belt will be different, so that the smoothness of the rotation of the speed measurement gear may be affected, and thus the problem of inaccurate results may occur. In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art and provide an optoelectronic speed sensor with reliable operation that can overcome the above problems or at least partially solve the above problems.

[0006] To solve the above technical problems, the basic concept of the technical solution adopted by the present utility model is as follows: An optoelectronic speed sensor with reliable operation, comprising: a support plate, on which a T-shaped sliding groove is provided; a T-shaped plate, slidably connected in the T-shaped sliding groove; a housing, arranged directly above the T-shaped plate; tensioning telescopic rods, symmetrically arranged between the T-shaped plate and the housing, with both ends of the tensioning telescopic rods fixedly connected to the T-shaped plate and the housing respectively; a speed measuring gear, rotatably connected in the housing through a rotating shaft; a friction roller, fixedly connected to one end of the rotating shaft extending out of the housing; an optoelectronic speed sensor body, threadedly connected to the housing, and the monitoring end is adjacent to the speed measuring gear; an installation component for installing the support plate on the scale frame of the belt scale, symmetrically connected to both ends of the support plate.

[0007] Further, the installation component includes an inverted concave-shaped frame, a lead screw, and a clamping plate. The inverted concave-shaped frames are symmetrically and fixedly connected to both ends of the support plate. The lead screw is threadedly connected to the side of the inverted concave-shaped frame away from the support plate. The clamping plate slides in the inverted concave-shaped frame and is rotatably connected to the end of the lead screw.

[0008] In order to facilitate improving the stability of the installation of the optoelectronic speed sensor on the belt scale, furthermore, the clamping plate is an L-shaped plate.

[0009] In order to facilitate increasing the contact area between the friction roller and the belt so that the belt can better drive the friction roller to rotate, further, the outer circumference of the friction roller is inclined, and an elastic rubber ring is fixedly connected to the inclined surface.

[0010] In order to reduce the friction between the support plate and the T-shaped plate, further, arc-shaped grooves are provided at the bottom and the front and rear sides of the T-shaped plate, and balls are embedded in the arc-shaped grooves.

[0011] In order to prevent dust and other impurities from entering the housing and adhering to the detection end of the optoelectronic speed sensor body, further, the rotating shaft is rotatably connected to the housing through a sealed bearing.

[0012] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art: By the coordinated use of components such as the support plate, T-shaped sliding groove, installation component, T-shaped plate, and tensioning telescopic rods, when the arc-shaped protrusion protruding downward of the belt in the belt scale is offset and not located at the central position, the two friction rollers can be automatically moved together to the side where the arc-shaped protrusion of the belt is offset, so that the two friction rollers can be as symmetrically distributed on both sides of the arc-shaped protrusion of the belt as possible, ensuring that the forces exerted by the belt on the two friction rollers are the same, thus facilitating ensuring that the speed measuring gear can rotate more smoothly and ensuring the accuracy when the optoelectronic speed sensor body detects the running speed of the belt, effectively improving the high reliability of data acquisition of the optoelectronic speed sensor during operation.

[0013] The specific embodiments of the present utility model will be further described in detail below in conjunction with the accompanying drawings. Description of the Drawings

[0014] In the drawings:

[0015] Figure 1 is the front view schematic diagram of the present utility model;

[0016] Figure 2 is the structural schematic diagram of the present utility model;

[0017] Figure 3 is the structural schematic diagram of the T-shaped plate, the tensioning telescopic rod and the ball in the present utility model.

[0018] In the figure: 1, support plate; 101, T-shaped chute; 102, T-shaped plate; 103, ball; 104, tensioning telescopic rod; 2, concave frame; 201, lead screw; 202, clamping plate; 3, housing; 301, speed measuring gear; 302, rotating shaft; 303, sealing bearing; 304, friction roller; 305, photoelectric speed sensor body; 306, elastic rubber ring. Specific Embodiments

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0020] Embodiment 1:

[0021] Referring to Figures 1 - 3 , a reliable photoelectric speed sensor, comprising: a support plate 1, on which a T-shaped chute 101 is provided; a T-shaped plate 102, slidably connected in the T-shaped chute 101; a housing 3, disposed directly above the T-shaped plate 102; tensioning telescopic rods 104, symmetrically disposed between the T-shaped plate 102 and the housing 3, and the two ends of the tensioning telescopic rods 104 are respectively fixedly connected to the T-shaped plate 102 and the housing 3; a speed measuring gear 301, rotatably connected in the housing 3 through a rotating shaft 302; a friction roller 304, fixedly connected to one end of the rotating shaft 302 extending out of the housing 3; a photoelectric speed sensor body 305, threadedly connected to the housing 3, and the monitoring end is adjacent to the speed measuring gear 301; and an installation component for installing the support plate 1 on the scale frame of the belt scale, symmetrically connected to both ends of the support plate 1.

[0022] The installation components include a concave frame 2, a lead screw 201, and a clamping plate 202. The concave frame 2 is symmetrically and fixedly connected to both ends of the support plate 1. The lead screw 201 is threadedly connected to the side of the concave frame 2 away from the support plate 1. The clamping plate 202 slides within the concave frame 2 and is rotatably connected to the end of the lead screw 201.

[0023] When installing this photoelectric speed sensor on the belt scale to detect the running speed of the belt, first place the photoelectric speed sensor in the middle position of the scale frame on the belt scale, and make the friction roller 304 located below the belt on the belt scale. Then, the tensioning telescopic rod 104 can be compressed, and the concave frame 2 can be buckled on the scale frames on both sides. Next, rotate the lead screw 201 to drive the clamping plate 202 to move until the clamping plate 202, the concave frame 2, and the side wall of the scale frame are in close contact, so that this photoelectric speed sensor can be stably installed on the belt scale. At the same time, the two friction rollers 304 will also be in close contact with the lower surface of the belt under the tension of the tensioning telescopic rod 104. Finally, electrically connect the photoelectric speed sensor body 305 to the controller, and the installation operation of this photoelectric speed sensor can be completed.

[0024] When the belt scale is running, the friction roller 304 will rotate driven by the belt at this time. The friction roller 304 will drive the speed measuring gear 301 to rotate synchronously through the rotating shaft 302. At this time, the photoelectric speed sensor body 305 will generate a pulse signal according to the rotating speed measuring gear 301, and then the pulse signal will transmit the detected data to the controller, and then the controller will analyze and calculate the received pulse signal, so that the running speed of the belt on the belt scale can be obtained.

[0025] When the belt scale transports goods, the belt on the belt scale will be arc-shaped under the action of the gravity of the goods at this time. When the goods are not located in the middle position of the belt, causing the arc-shaped bulge where the belt bulges downward to shift and not be located in the center position, the force exerted by the belt on one of the friction rollers 304 will decrease, and the force exerted on the other friction roller 304 will increase. Since the T-shaped plate 102 is slidably connected to the T-shaped chute 101 of the support plate 1, when the belt exerts a greater force on the other friction roller 304, it will move the two friction rollers 304 together to the side where the belt arc-shaped bulge shifts with the cooperation of the tensioning telescopic rod 104, so that the two friction rollers 304 can be symmetrically distributed on both sides of the belt arc-shaped bulge as much as possible, ensuring that the forces exerted by the belt on the two friction rollers 304 are the same, thus facilitating the more stable rotation of the speed measuring gear 301 and ensuring the accuracy of the photoelectric speed sensor body 305 when detecting the running speed of the belt, effectively improving the high reliability of data collection of this photoelectric speed sensor during operation.

[0026] Embodiment 2:

[0027] Referring to Figures 1 - 3 , an optoelectronic speed sensor with reliable operation, which is basically the same as that of Embodiment 1. Further, the clamping plate 202 is an L-shaped plate. As Figure 1 shown, by designing the clamping plate 202 in an L shape, when the clamping plate 202 is closely attached to the scale frame on the belt scale, the clamping plate 202 can, with the cooperation of the concave-shaped frame 2, firmly clamp the installation component on the scale frame, thereby improving the stability of the optoelectronic speed sensor installed on the belt scale and ensuring the reliability of the optoelectronic speed sensor during operation.

[0028] The outer circumference of the friction roller 304 is inclined, and an elastic rubber ring 306 is fixedly connected to the inclined surface. As Figure 2 shown, by designing the outer circumference of the friction roller 304 to be inclined and arranging the elastic rubber ring 306 on the inclined surface, when the friction roller 304 contacts the belt on the belt scale, the elastic rubber ring 306 can deform under the pressure of the belt, thereby increasing the contact area between the friction roller 304 and the belt, so that the belt can better drive the friction roller 304 to rotate, and further improving the reliability of the optoelectronic speed sensor during operation.

[0029] Arc-shaped grooves are provided at the bottom, front and back sides of the T-shaped plate 102, and balls 103 are embedded in the arc-shaped grooves. By providing the balls 103, the sliding friction between the T-shaped plate 102 and the support plate 1 can be converted into rolling friction, thereby reducing the friction force between the support plate 1 and the T-shaped plate 102, so that the friction roller 304 can be adjusted flexibly in position.

[0030] The rotating shaft 302 is rotatably connected to the housing 3 through a sealed bearing 303. By providing the sealed bearing 303, the rotating connection between the rotating shaft 302 and the housing 3 can be sealed, preventing dust and other impurities from entering the housing 3 and adhering to the detection end of the optoelectronic speed sensor body 305, and further improving the reliability of the optoelectronic speed sensor during operation.

[0031] The above are only the preferred embodiments of the present invention, and there is no restriction on the present invention in any form. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention.

Claims

1. An optoelectronic speed sensor with reliable operation, characterized in that, Including: A support plate (1) with a T-shaped chute (101) formed thereon; A T-shaped plate (102) slidably connected in the T-shaped chute (101); A housing (3) disposed directly above the T-shaped plate (102); Tensioning telescopic rods (104) symmetrically arranged between the T-shaped plate (102) and the housing (3), with both ends of the tensioning telescopic rods (104) fixedly connected to the T-shaped plate (102) and the housing (3) respectively; A speed measurement gear (301) rotatably connected in the housing (3) through a rotating shaft (302); A friction roller (304) fixedly connected to one end of the rotating shaft (302) extending out of the housing (3); An optoelectronic speed sensor body (305) threadedly connected to the housing (3) and having a monitoring end adjacent to the speed measurement gear (301); An installation assembly for installing the support plate (1) on the scale frame of a belt scale, symmetrically connected to both ends of the support plate (1).

2. The reliable working photoelectric speed sensor according to claim 1, wherein, The installation assembly includes an inverted concave frame (2), a lead screw (201), and a clamping plate (202). The inverted concave frame (2) is symmetrically and fixedly connected to both ends of the support plate (1). The lead screw (201) is threadedly connected to the side of the inverted concave frame (2) away from the support plate (1). The clamping plate (202) slides in the inverted concave frame (2) and is rotatably connected to the end of the lead screw (201).

3. The reliable working photoelectric speed sensor according to claim 2, characterized in that, The clamping plate (202) is an L-shaped plate.

4. An optoelectronic speed sensor with reliable operation according to claim 1, characterized in that, The outer circumference of the friction roller (304) is inclined, and an elastic rubber ring (306) is fixedly connected to the inclined surface.

5. An optoelectronic speed sensor with reliable operation according to claim 1, characterized in that, Arc-shaped grooves are formed at the bottom and the front and rear sides of the T-shaped plate (102), and balls (103) are embedded in the arc-shaped grooves.

6. The optoelectronic speed sensor with reliable operation according to claim 1, characterized in that, The rotating shaft (302) is rotatably connected to the housing (3) through a sealed bearing (303).

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