SU853499A1 - Photoelectric recorder of grain flow density - Google Patents

Description

I

The invention relates to the field of photovoltaic control of bulk media and can} be used in devices for determining the parameters of a seed flow of sowing seedlings of seedlings, mainly of row sowing.

In addition, the invention can be used in devices for controlling the seeding process.

One of the photoelectric recorders of seed flow density contains this wire, a radiation source, a photodetector and a RE detector

A disadvantage of the known devices is that they only fix the seeds, proletacle through this wire or the opener is strictly different to each other one by one. The span of seeds (two or more) located close to each other (two or three) is recorded by the device as the passage of one seed. In addition, d: t reliable fixation of seeds requires strict focusing and directionality of the light source, and at the same time there are non-working areas in which the seeds are not fixed, as they fly out of range of the photo receiver or light source.

The closest technical solution to the invention is a photoelectric density recorder.

The seed flow contains a cylindrical sem wire with radiation sources and a number of photodetectors mounted on its walls and connected to the recorder .2.

IS

Claims (1)

The accuracy of the registration of the seed flow is insufficient because there are non-working zones in the light field, since light sources produce a beam with a scan of no more than 180 °, and the seeds flying in these zones are not recorded. The passage of two or more closely spaced seeds through one elementary site is also not recorded, since in this case the counter registers only one seed. The purpose of the invention is noBbnneime registration accuracy. This goal is ensured by the fact that a well-known synchronicity source connected to sources is connected to a well-known photoelectric semiconductor density detector :: containing a cylindrical semester with a radiation source and a number of photodetectors mounted on its stacks and connected to the recorder. radiation and the recorder, and the photodetection of NIKI are located along the helix and the cylindrical surface of the seed wire. FIG. Figure 1 shows a section of a coulter or a cylindrical sem wire with radiation sources and photoelectric radiation detectors located on it; in fig. 2 electrical device diagram. The device contains -p d photodetectors I and radiation sources 2, a recorder containing electronic amplifiers 3 and a pulse counter 4 according to the number of photodetectors of radiation and synchronization unit 5. Photoreceivers 1 are arranged so that they form a helix that covers the cylindrical surface of this wire for At the beginning of the perimeter of each photodetector, it coincides with the end of the perimeter of the previous photodetector. The radiation sources 2 are arranged so that they create a volumetric light cloud in the zone of flight of the sown seeds. Each photodetector 1 is connected through an appropriate amplifier 3 with its own counter A. The radiation sources are connected to the left output of the synchronization unit 5, and the second inputs are connected to the enable inputs of the counters 4. The photoelectric recorder works as follows. The synchronization unit 5 generates a sequence of pulses that synchronize the operation of the recorder and cause periodic flashes. 94 Seed flow, flowing through the radiation zone, creates a shadow image perceived by the photoreception. Nikami 1 in the form of photo pulses amplified by amplifiers 3 and registered by counters 4, according to the indications of which judge the density of the seed flow under study. Since the duration of the flashes by the radiation source is at least two orders of magnitude shorter than the transit time of any seed between two adjacent photodetectors, and the photoreceivers are located along a helical line, each family can only be registered by one photodetector. The pulses also arrive at the permitting inputs of all counters 4, ensuring their disconnection during the transient period when the radiation intensity of the radiation sources 2 decreases from the operating value to zero. This eliminates the registration of counters 4, the so-called spurious pulses, arising from a decrease in the radiation intensity. The invention allows to improve the accuracy of registration of seed flow in the study of its parameters by eliminating non-working areas. Invention A photoelectric recorder of seed flow density containing a cylindrical sem wire with radiation sources and a number of photodetectors mounted on its walls and associated with a recorder, characterized in that, in order to improve the accuracy of operation, a synchronization unit is added to it with the radiation source and the recorder, and the photodetectors are located along a helix on the cylindrical surface of the seven wires. Sources of information taken into account in the examination 1. US patent number 3927400, cl. 340-276, pub. 1976. 2. iBTOpcKoe certificate of the USSR 410252, cl. G 01 D 9/00, 1974 (prototype).