Photoelectric coding positioning device for greenhouse

Abstract

The utility model belongs to the technical field of intelligent greenhouses, and particularly discloses a photoelectric coding positioning device for a greenhouse, which comprises a coding steel belt and a photoelectric unit which is fixedly arranged on an external roller shutter motor and moves along the length direction of the coding steel belt, a plurality of groups of scales are arranged on the coding steel belt, each group of scales consists of a plurality of infrared pair transistor groups arranged along the width direction of the coding steel belt, and the number and the positions of the infrared pair transistor groups correspond to the number and the positions of coding holes in each group of scales on the coding steel belt; and the signal output end of the infrared geminate transistor is connected with the signal input end of the external control unit. According to the utility model, the accurate ascending or descending position of the roller shutter can be determined, and a more suitable environment is provided for greenhouse planting.

Description

Technical Field

[0001] The utility model belongs to the technical field of intelligent greenhouses, and in particular relates to a photoelectric coding positioning device for greenhouses. Background Art

[0002] As an important agricultural facility for cultivating crops, greenhouses play an important role in improving crop quality and increasing the variety of non-seasonal crops, and are of great significance to my country's agricultural production. The most important part of a greenhouse is the heat-insulating roof covering. In modern agricultural operations, mechanized roller blinds have replaced quilts, heat-insulating films and other coverings.

[0003] At present, greenhouse cultivation has become intelligent. A core function of the smart greenhouse in the existing technology is to provide intelligent rolling shutter operation, that is, by building the Internet of Things to monitor the greenhouse environment in real time, and the controller controls the rolling shutter motor according to the required environmental conditions to achieve the rise and fall of the rolling shutter, so as to ensure the best growth environment for crops in the greenhouse.

[0004] However, the determination of the position of the rolling curtain in the prior art is only a rough position, which has a relatively large error and is difficult to achieve the determination of the precise position of the rising or falling of the rolling curtain. Utility Model Content

[0005] The utility model aims to provide a photoelectric coding positioning device for greenhouses, which can accurately control the position of rolling curtains.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] It includes a coding steel belt and a photoelectric unit which is fixed on an external roller shutter motor and moves along the length direction of the coding steel belt;

[0008] The coding steel belt is provided with a plurality of groups of scales, each group of scales is composed of a plurality of coding holes arranged along the width direction of the coding steel belt;

[0009] The photoelectric unit includes a shell that is inserted into the coding steel belt and a plurality of infrared pair tube groups arranged inside the shell, and the number and position of the infrared pair tube groups correspond to the number and position of the coding holes in each group of scales on the coding steel belt;

[0010] The signal output end of the infrared pair tube is connected to the signal input end of the external control unit.

[0011] As a limitation, the scale is divided into a main scale and a sub-scale, and a number of sub-scales are evenly spaced between every two main scales; the main scale is composed of a main scale mark position represented by a coding hole, and data positions represented by a number of coding holes; the sub-scale is composed of a number of data positions; the coding hole on one side of the two sides of the coding steel belt in the main scale is the main scale mark position, and the remaining coding holes are data positions;

[0012] The coding holes include through holes and blind holes; the coding holes at the main scale mark positions are through holes.

[0013] As a second limitation, guide pins for limiting the position of the coding steel strip are arranged on both sides of the coding steel strip inside the shell.

[0014] As a third limitation, scrapers in contact with the coding steel strips are fixedly provided on both sides of the five groups of infrared tubes.

[0015] As a fourth limitation, the shell passes through both ends of the coding steel strip and is fixed with brushes for contacting the coding steel strip.

[0016] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0017] (1) The utility model sets a photoelectric coding positioning device on the greenhouse, and the photoelectric unit in the photoelectric coding device cooperates with the coding holes representing the scale on the coding steel belt to read the position of the rolling curtain in real time, thereby realizing accurate control of the position of the rolling curtain;

[0018] (2) In the present invention, by setting a main scale and a sub-scale on the coding steel belt, the position of the roller blind can be determined more accurately;

[0019] (3) The utility model provides guide pins inside the shell and on both sides of the coding steel belt to prevent the shell from shifting in the width direction of the coding steel belt when it moves on the coding steel belt, so that the infrared tube and the light-transmitting hole cannot be aligned, resulting in the problem that the scale cannot be read or the read scale is inaccurate;

[0020] (3) The utility model has a scraper in contact with the coding steel belt inside the shell, and bristles in contact with the coding steel belt at both ends of the shell passing through the coding steel belt, so as to clean dust and rainwater in an outdoor working environment to ensure that the device is in normal working condition.

[0021] In summary, the utility model can determine the precise position of the rising or falling of the rolling curtain, and provide a more suitable environment for greenhouse planting. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of the use state of the embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the coding steel strip in the embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the explosion structure of the photoelectric unit of the embodiment of the utility model;

[0027] Figure 5 This is a schematic diagram of the structure of five groups of infrared pair tubes in the embodiment of the utility model;

[0028] In the figure: 1, greenhouse side wall, 2, rolling shutter shaft, 21, rolling shutter motor, 31, coding steel belt, 311, main scale mark, 312, data bit, 313, first side, 314, through hole, 32, first shell, 321, guide pin, 322, scraper, 323, brush, 324, groove, 325, infrared transmitting tube, 326, infrared receiving tube, 33, second shell. DETAILED DESCRIPTION

[0029] In order to better explain the present invention and facilitate understanding, the preferred embodiments of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0030] Example

[0031] To better demonstrate the use of this embodiment, Figure 1 The figure shows the greenhouse side wall 1, the rolling curtain shaft 2 and the rolling curtain motor 21 fixed to one end of the rolling curtain shaft 2.

[0032] like Figure 1 to Figure 2 As shown, this embodiment includes a coding steel belt 31 and a photoelectric unit. When in use, the coding steel belt 31 is arranged along the slope of the greenhouse, one end of the coding steel belt 31 is fixed to the top of the greenhouse side wall 1, and the other end is fixed to the bottom of the greenhouse side wall 1. The photoelectric unit is fixed to the roller shutter motor 21 and moves along the length direction of the coding steel belt 31 with the roller shutter motor 21.

[0033] like Figure 3As shown, the coding steel belt 31 is provided with several groups of scales, each group of scales is composed of several coding holes arranged along the width direction of the coding steel belt 31; the scales are divided into main scales and sub-scales, and nine sub-scales are evenly arranged between every two main scales. The main scale is composed of a main scale mark 311 represented by a coding hole, and a data bit 312 represented by four coding holes; the sub-scale is composed of four data bits 312, and the coding hole in the main scale close to the first side 313 of the coding steel belt 31 is the main scale mark 311, and the remaining four coding holes are data bits 312. Among them, the coding holes include through holes and blind holes, and the coding hole of the main scale mark 311 is a through hole.

[0034] In this embodiment, the coded hole in the data bit 312 is recorded as "1" for a through hole, and the blind hole is recorded as "0". The four data bits 312 of the main scale data and the sub-scale are all encoded in binary digits. The main scale data bit 312 corresponding to the maximum length that can be measured by the coding designed in this embodiment is encoded as "1111", and the digits correspond to "1, 2, 4, 8" in the decimal system from right to left, so the maximum measurable length is 15m. In actual use, the number of bits or encoding rules of the encoding can be adjusted according to the length to be measured.

[0035] In this embodiment, the coding steel strip 31 is a stainless steel strip with a width of 30 mm and a thickness of 0.3 mm. Each through hole or blind hole is regarded as a hole position, each hole position is a circle with a diameter of 3 mm, and the interval between the centers of each two hole positions is 5 mm.

[0036] like Figure 4 As shown, the photoelectric unit includes a shell, and the shell includes a first shell 32 and a second shell 33. The first shell 32 is used to pass through the coding steel belt 31; the light spot unit also includes five groups of infrared pair tubes, each group of infrared pair tubes includes an infrared emitting tube 325 and an infrared receiving tube 326. The first shell 32 is provided with a groove 324 below the coding steel belt 31, and the five infrared emitting tubes 325 are fixed in the groove 324 along the width direction of the coding steel belt 31; the five infrared receiving tubes 326 are fixed in the second shell 33, and are arranged corresponding to the five infrared emitting tubes 325. The corresponding relationship between the five groups of infrared pair tubes and the coding holes on the coding steel belt 31 is shown as follows. Figure 5 The signal output end of the infrared pair tube group is connected to the signal input end of the external control unit.

[0037] The first shell 32 is also provided with four groups of guide pins 321 for limiting the position of the coding steel belt 31, and a scraper 322 in contact with the upper surface of the coding steel belt 31 is provided between each group of guide pins 321; brushes 323 for cleaning the steel belt 31 are respectively fixed at both ends of the first shell 32.

[0038] During use of this embodiment, an external controller controls the rolling motor 21, which drives the rolling shaft 2 to rotate. The photoelectric unit is fixed on the rolling motor 21 and rises or falls along the coding steel belt 31 with the rolling motor 21.

[0039] Taking the 1.1m scale position on the coding steel belt 31 as an example, when the light spot unit passes the 1m scale position, the five groups of infrared pair tubes correspond to the five coding holes on the coding steel belt 31. When the main scale mark 311 is a through hole, when the infrared receiving tube 326 in the infrared pair tube corresponding to the main scale mark 311 receives the infrared light emitted by the infrared transmitting tube 325, it indicates that the scale position corresponds to the main scale, that is, the scale is an integer before the decimal point. Then the infrared pair tube group identifies the data bit 312 of the main scale, and identifies "0001" and reads the integer value corresponding to the data bit 312 as "1".

[0040] The photoelectric unit continues to move forward and passes the 1.1m scale position. The infrared receiving tube 326 in the infrared pair tube group close to the first side 313 of the coding steel belt 31 does not receive the infrared light emitted by the infrared emitting tube 325, indicating that this scale position corresponds to the sub-scale. Then, the data bit 312 of the sub-scale is identified according to the four-bit data bit 312 of the sub-scale position, and "0001" is identified, and the value after the decimal point is read as "1". This embodiment can read one decimal place.

[0041] The values ​​read out according to the coding rules are transmitted to the external control unit in real time, and the staff can determine the precise position of the roller blind based on the read values.

Claims

1. A photoelectric coding positioning device for greenhouses, characterized in that: It includes a coding steel belt and a photoelectric unit which is fixed on an external roller shutter motor and moves along the length direction of the coding steel belt; The coding steel belt is provided with a plurality of groups of scales, each group of scales is composed of a plurality of coding holes arranged along the width direction of the coding steel belt; The photoelectric unit includes a shell that is inserted into the coding steel belt and a plurality of infrared pair tube groups arranged inside the shell, and the number and position of the infrared pair tube groups correspond to the number and position of the coding holes in each group of scales on the coding steel belt; The signal output end of the infrared pair tube is connected to the signal input end of the external control unit.

2. The photoelectric coding positioning device for greenhouse according to claim 1, characterized in that: The scale is divided into a main scale and a sub-scale, and a plurality of sub-scales are evenly spaced between every two main scales; the main scale is composed of a main scale mark position represented by a coding hole, and data positions represented by a plurality of coding holes; the sub-scale is composed of a plurality of data positions; the coding hole close to one side of the two sides of the coding steel belt in the main scale is the main scale mark position, and the remaining coding holes are data positions; The coding holes include through holes and blind holes; the coding holes at the main scale mark positions are through holes.

3. The photoelectric coding positioning device for greenhouse according to claim 2, characterized in that: Guide pins for limiting the position of the coding steel belt are arranged on both sides of the coding steel belt inside the shell.

4. The photoelectric coding positioning device for greenhouse according to claim 3, characterized in that: Scrapers in contact with the coding steel strips are fixedly arranged on both sides of the five groups of infrared pair tubes.

5. The photoelectric coding positioning device for greenhouse according to any one of claims 1 to 4, characterized in that: The shell passes through both ends of the coding steel belt and is fixed with brushes for contacting the coding steel belt.

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