CS261438B1 - Radiation transmission equipment and electronic sheet surface evaluation - Google Patents

Abstract

The solution belongs to the field of biological devices and solves the measurement and electronic evaluation of the radiation transmission of the leaf area size in a non-destructive way directly in the stand. Its essence is that the device consists of a measuring unit with sensors connected to the registration and evaluation part, consisting of a registration circuit with an evaluation device and a reference sensor. The sensors consist of a detector with a photoelectric selenium photocell, above which there is a reduction filter and which are placed under a hemispherical receptor made of opal glass.

Description

261438

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for the measurement and electronic evaluation of transmission radiation, the size of a leaf surface in a non-destructive manner directly in the stand. The previously known embodiment for measuring solar radiation in the growth profile is such that one measurement unit for measuring the radiation flux density is placed above and the second measurement unit in the post-sheet area. Due to the unevenness of the stand, the need for a larger number of units of measure is shown. The location of one unit of measurement in a stand under the sheet is insufficient. For this reason, more measuring units with sensors are placed in the stand. Since the solar radiation flux is characterized by short short-term fluctuations even in the seemingly clear sky and very large in all kinds of obstructions, it is relatively difficult to read the actual current flux density of the larger number of transducers over a given time. -the moment placed under the sheet-top. Multi-dimensional sensors are used for this purpose, exclusively with thermoelectric detectors. Since one unit of measurement for sensors is suitable for measuring the direct but significant higher power density of the solar beam flux over the stand, and the second is a higher number of sensors for very low radiation in the stand, it is unsatisfactory because the location in the stand is adjacent to low irradiation is the dissipation of heat from the surface of the irradiated thermocouple junction to another, in proportion to the cohort of the thermocouple above the stand that the sun rays can cause. Thus, their use for such purposes is considerably limited or inaccurate.

The above-mentioned drawbacks are eliminated by a radiation measurement device and electronic evaluation of the sheet surface according to the invention, characterized in that it consists of a sensor unit connected to an evaluation unit register consisting of a registration circuit and an evaluation unit. device and reference sensor. The sensors and the reference sensor are comprised of a photoelectric selenium photocell detector, above which a reducing filter is located and placed under the hemispherical opal receptor. The registration circuit is connected such that the sensor terminals are via input trimmers and input resistors connected to the inverting input of the operational amplifier and its non-inverting input is connected to the ground by a first bias resistor. Between the inverting input and the output is the first resistor. The output of the operational amplifier is connected to the inverting input of the differential amplifier via a first resistor, and a third sleep resistor is connected between its inverting input and output. The reference sensor terminal is connected via a second resistor to the inverting input of the inverting amplifier, to which a non-inverting resistor is connected to the ground and a sleep binder resistor and a second resistive resistor are connected between its inverting input and output in the serie. The inverting amplifier output is connected via a third resistor, a non-inverting differential amplifier input, to which a third bias resistor is coupled to the earth. The differential amplifier output is connected to the output terminal. Advantages of the device according to the invention are that they are used for measuring and electronic evaluation of radiation transmission, large-surface area non-destructive in the stand. It can be used in bio- logical and ecological experiments, for production purposes in agricultural research and practice, as well as in the detection of leaf area damage by diseases, and other interventions. It will also serve as a teaching aid.

In particular, the advantages of such an orderly unit with a larger number of sensors placed directly in the stand under the leaf surface in that due to the post-growth imbalance, it provides in a short period of time data from several places in the stand, giving a lower number of measurements. In addition, it can be used to measure and evaluate the size of the leafy leaf area directly in the field.

FIG. 1 shows an overall view of the radiation transducer and the electronic evaluation of the leaf surface, FIG. 2 shows a transducer, FIG. FIG. 4 shows a schematic of the device registration circuit according to the invention.

In the drawing, FIG. 1 shows an overall view of a device where the unit 1 with sensors 3 placed in growth is connected to a registration evaluation part 2, providing an average value of the illumination intensity of the larger one. Figure 2 shows a detailed front view of the reference sensor 4 of the transducers 3, which comprise an opal glass hemispherical receptor 5, a detector 6 with a photoelectric selenium photocell, and a detector 6 with a photoelectric selenium photocell; a reducing filter 7 which is used to measure at higher solar radiation values. The registration and evaluation part 2 in Fig. 3 includes an output with a region 8, a range switch 9, a source voltage indicator 10, a reference sensor 4 for the power supply 11, a input connection 12 for the measuring unit, and a calibration and zero adjustment 13. Fig. 4 is a registration circuit diagram

Claims (2)

SUBJECT A device for measuring radiation transmission and electronically evaluating a leaf surface in a non-destructive manner directly in a stand, characterized in that it consists of a measuring unit (1) with sensors (3) connected to a recording evaluation part (2) consisting of a recording circuit [8] with an evaluation device and a reference sensor (4), wherein the sensors (3) and the reference sensor (4) consist of a detector (6) with a photoelectric selenium photocell, over which a reduction filter (7) is located and which is located under the hemispheric receptor (5) opal glass. Device according to claim 1, characterized in that the terminals (Pi to P _r ) of the sensors (3) are connected via an input trimmer (Rot to Rot) and an input resistor (R1-Rij) to an inverting input of an operational amplifier (OZi) and to its non-inverting input is connected to ground by a first bias resistor (Re) and between the invention its inverting input and output is connected to the first feedback resistor (R6) and the operational amplifier output (OZi) is connected to the inverting input of the differential amplifier (R10) A third reverse resistor (R12) is connected between its inverting input and output, the reference sensor (4) terminal (N) being connected via a second resistor (R7) to the inverting input of the inverting amplifier (OZ ₂ ) to which the non-inverting input a second biasing resistor (Rg) is connected to ground and between its inverting input and output are connected in series of return trimer (Roe) and dr the low-voltage resistor (Rej and the inverting amplifier output (OZ2) is connected via a third resistor (R11) to the non-inverting input of the differential amplifier (OZ3) to which the third bias resistor (R13) is connected to ground, the differential amplifier output (OZ3) is connected to the output terminal (V).