CN102323176B - Determination device of crop leaf droplet retention amount - Google Patents

Abstract

The invention relates to a device for measuring droplet retention of crop leaves, which belongs to the technical field of agricultural and forestry engineering testing. The base of the device can lock and hinge the vertical semicircular angle plate through the vertical rod, and the semicircular angle plate is equipped with the sleeve and the sleeve shaft forming the rotating pair; one of the sleeve and the sleeve shaft is fixed on the semicircle angle plate , and one end of which is fixed with an angle disc; the other end of the casing and the casing shaft is fixedly connected with the boss facing upward, and one end is fixedly connected with a knob. Since the semi-circular angle disc, sleeve pipe, angle disc and sleeve shaft in the present invention constitute a three-dimensional rotating carrier, the blades can receive the droplets at different inclination angles, so that the spray droplets on the crops under the conditions of different spatial extension angles can be measured. The variation law and maximum retention on the leaves, and accurately analyze and study the relationship between the amount of pesticide applied per unit area and the retention of pesticide droplets on crop leaves.

Description

Crop Leaf Droplet Retention Measuring Device

technical field

The invention relates to a measuring device, in particular to a measuring device for crop leaf droplet retention, and belongs to the technical field of agricultural and forestry engineering testing facilities.

Background technique

In order to prevent and control pests and diseases that harm crops, chemical pesticides are often sprayed in farmland. According to the applicant's understanding, when the sprayer is spraying pesticides in the field, the amount of pesticide applied per unit area is an important working parameter in the field pesticide application. If the application amount is too small, the full coverage of the pesticide droplets on the crop leaves cannot be achieved, and the lethal dose of the pests and diseases cannot be reached, and the control effect is poor; if the application amount is too large, the pesticide droplets will be excessively saturated on the crop leaves, making the pesticides less effective. Fog droplets gather into water droplets on the crop leaves and the leaves are lost. The large loss of pesticides not only causes certain economic losses, but also pollutes the ecological environment of farmland. Therefore, it is of great significance to quickly and accurately detect the retention of pesticide droplets on different crop leaves to improve the effective utilization rate of pesticides and optimize the setting of spray operation parameters.

The search found that the Chinese patent application with the application number CN201110032409.8 discloses a metering device for the change of the amount of sprayed liquid on the surface of plant leaves. , the base of the leaf loading platform, the trumpet-shaped casing, the electronic balance is placed inside the glass cover, the base of the leaf loading platform is placed on the electronic balance, and a small hole is opened on the top of the glass cover, and the supporting rod of the leaf loading platform passes through the small hole and inserted into the loading The base of the leaf stage is supported, the leaf stage is fixed on the top of the support rod of the leaf stage, the trumpet-shaped tube sleeve is placed on the upper surface of the glass cover and sleeved outside the support rod of the leaf stage, and its inner wall is loosely matched with the support rod of the leaf stage . The metering device of the invention can be used to measure the change of the retention amount of the sprayed medicinal liquid on the surface of the plant leaves. Compared with the method of directly immersing in the liquid medicine, the simulation process of the device is closer to the actual situation, so the test result of the liquid medicine retention is more accurate.

However, the above-mentioned measuring device can only simulate a position state inclined in a two-dimensional direction, so the measurement results have great limitations. Because the leaves of crops in the natural state are likely to be at a spatial angle, especially affected by factors such as cilia on the leaf surface, the maximum retention of droplets may not be measured by tilting in the horizontal direction. In addition, the metering device cannot intuitively reflect the inclination angle, which is inconvenient to use.

Contents of the invention

The object of the present invention is to: aim at the shortcoming that above-mentioned prior art exists, propose a kind of droplet retention measuring device that can measure droplet retention on crop leaf under the condition of different space extension angles, and observation is convenient, Thus creating conditions for the analysis and research of the corresponding relationship between the amount of spray per unit area and the maximum retention of pesticide droplets on crop leaves.

In order to achieve the above object, the device for measuring droplet retention of crop leaves of the present invention includes a base on which a vertical semi-circular angle plate can be locked and hinged through a vertical bar, and a casing forming a rotating pair is mounted on the semi-circular angle plate. and the quill; one of the sleeve and the quill is fixed on the semicircular angle plate, and an angle disc is fixed at one end thereof; the other of the sleeve and the quill is facing upwards The boss is fixedly connected, and a knob is fixedly connected at one end thereof.

Because the semicircle angle disc, sleeve pipe, angle disc and sleeve shaft in the present invention constitute the carrier of three-dimensional rotation, after base is arranged on the metering device such as balance, crop blade is fixed on the boss, can Adjust the blade to any space angle between -90°～90° with the ground, and rotate along the shaft axis of the casing or casing within the range of -180°～180°, so that the blade can receive the droplets at different inclination angles, so as to measure the mist in different spaces Under the condition of stretching angle, the variation law and maximum retention of fog droplets on crop leaves, and accurately analyze and study the relationship between spraying amount per unit area and pesticide droplets on crop leaves.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of the actual application state of the embodiment of Fig. 1 .

FIG. 3 is a schematic diagram of a further improved enlarged structure of the embodiment in FIG. 1 .

Detailed ways

Embodiment one

As shown in Figure 1, the crop leaf droplet retention measurement device of the present embodiment, the vertical bar 2 extending on the disc-shaped base 1 can lock the vertical half-circle angle with scale through the fastening screw 6 in the horizontal direction. Disc 3, the sleeve pipe 4 and the sleeve shaft 7 that form rotating pair are housed on this semicircle angle disc 3. The casing 4 in this embodiment is fixed on the semi-circular angle disc 3 with the axial direction parallel to the diameter direction of the semi-circular angle disc 3 , and an angle disc 8 perpendicular to its axial direction is fixed at one end thereof. Sleeve shaft 7 is fixedly connected with two interval bosses 5, and one end thereof is fixedly connected with knob 9 to be scaled. Since there is a circumferential chute on the sleeve 4 corresponding to the position of the boss, and the width of the circumferential chute matches the width of the boss, not only when the knob is turned to rotate the sleeve shaft in a certain angle range, no Motion interference, and an axial limit relationship is formed between the two, which avoids axial movement.

During use, the crop leaf pesticide mist droplet retention measurement device of the present embodiment is placed on the precision electronic balance tray that is covered in the glass cover 10, as shown in Figure 2, the vertical bar 2 does not contact with the glass cover 10, The glass cover 10 is not in contact with the precision electronic balance, and the blade to be measured is attached to the two bosses. Loosen the fastening screw 6 to adjust the angle of the blade in the vertical plane A from -90° to 90°, and through the knob 9 to adjust the angle of the blade to -180° to 180° in the plane B of the vertical plane A Angle, so that it is very convenient to realize the adjustment of the three-dimensional inclination angle of the blade in space. In this way, it is possible to accurately measure the situation that the blade receives pesticide droplets at different inclination angles, and by continuously observing the readings of the precision electronic balance, the maximum retention of the spray droplets at a specific inclination angle of the blade can be known. When the crop leaves are facing up, the droplet retention on the front of the leaves is measured, and when the leaves are facing up, the droplet retention on the opposite side of the leaves is measured.

Normally, most of the crop leaves can block the device of this embodiment. Therefore, the reading shows only the droplet mass deposited on the crop leaves. When the blades are small, the readings of the precision electronic balance with blades can be measured after spraying, and then the readings without blades can be subtracted.

Compared with the prior art, due to the reasonable and ingenious improvement of the present invention, which constitutes a three-dimensional rotating carrier, it can overcome the limitation that it can only be tilted in a two-dimensional direction, and measure the droplet retention at any spatial angle of the blade. And the angle scale reflects intuitively, so it creates ideal conditions for accurate analysis and research on the relationship between the amount of spray per unit area and the pesticide droplets on crop leaves.

The further improvement of this embodiment is shown in Figure 3. There is a piston chamber in the sleeve shaft 7, and the piston chamber is inserted with a matched piston. The piston extends out of the pull rod 11 protruding from the center of the knob; The center of the suction cup has a suction hole leading to the piston chamber. In this way, when the vane is placed on the boss and fitted to the suction cup, the rod is drawn outward, and the vane can be sucked by means of the slight negative pressure formed by the piston cavity. After the measurement is completed, the blade can be removed by releasing the negative pressure, which is more convenient than pasting the blade.

In addition to the above-mentioned embodiments, the present invention can also have other implementations. For example, obviously, the sleeve shaft can also be fixed on the semicircular angle disk with the axial direction parallel to the diameter direction of the semicircular angle disk, and an angle disk perpendicular to its axial direction is fixed at one end. The casing is fixedly connected with the two spaced bosses, and a knob is fixedly connected at one end thereof. The position of the casing corresponding to the vertical bar is provided with a circumferential chute, so there will be no motion interference when the casing rotates. At this time, if it is necessary to use a suction cup to hold the blade, it can be further improved with reference to the above embodiment, as long as the position of the outer circle of the sleeve shaft corresponding to the boss is formed with a circumferential groove that communicates with the piston chamber through a radial hole, the circumferential groove can be used. The groove makes the suction hole in the center of the suction cup communicate with the piston chamber of the sleeve shaft, so that the rod can be drawn outwards, and the blades can be sucked by the slight negative pressure formed by the piston chamber. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims (2)

1. A crop leaf droplet retention measuring device, comprising a base, on the base, a vertical semicircle angle plate can be locked and hinged by a vertical bar, and the sleeve pipe and the sleeve pipe forming a rotating pair are housed on the semicircle angle plate shaft; one of the sleeve pipe and the sleeve shaft is fixed on the semicircular angle disc, and one end thereof is fixed with an angle disc perpendicular to the axial direction of the sleeve; the other of the sleeve pipe and the sleeve shaft is connected to the The boss facing upwards is fixedly connected, and a knob is fixedly connected to one end thereof; the sleeve is fixed on the semicircle angle disk axially parallel to the diameter direction of the semicircle angle disk; the sleeve shaft and the two spaced bosses It is fixedly connected, and there is a circumferential chute on the position corresponding to the boss of the sleeve; it is characterized in that: the sleeve shaft has a piston cavity, and the piston cavity is inserted with a matching piston, and the piston extends out from the knob A pull rod protruding from the center; a suction cup is provided on the boss, and a suction hole leading to the piston cavity is provided in the center of the suction cup. 2 . The device for measuring droplet retention on crop leaves according to claim 1 , wherein the vertical bar can be locked and hinged to support a vertical semicircular angle plate with graduations through horizontal fastening screws. 3 .

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