SU752429A1 - Shaft angular position- to-code converter - Google Patents

Description

(54) CONVERTER ANGLE OF TURNING INTO CODE

Claims (2)

The invention relates to automation and measuring technology and can be applied to measure linear and angular movements of rotating objects. Converters of the angle of rotation into a code are known, which contain disks with radially placed permanent magnets on them, disks with reed switches placed on them, which are connected to a voltage divider forming a reading unit. Between each pair of disks with reed switches and magnets there is a shielding disk with cuts and protrusions Disadvantages of known transducers, their design complexity caused by the use of a shielding disk and voltage divider, as well as their low reliability due to the possibility of imposing impulses from neighboring reed switches. The closest solution to the invention is a converter comprising a disk on which permanent magnets (ferromagnetic elements) are placed, relative to which along the movement direction on the other disk (base) closing reed switches are installed, one of whose contacts is connected to the reading unit. Corrective magnets are installed at the ends of the ferromagnetic elements, and movable magnets are mounted between the disk and each of the reed switches mounted on opposite sides of the lever connected to the rotating axis, the movable magnets located on the lever on the side facing the sheet. opposite the correction magnets 2. The disadvantages of the known transducers are their low reliability and structural complexity. The purpose of the invention is to increase the reliability and simplify the design of the converter. This is achieved in that the converter containing a disk on which permanent magnets are placed, relative to which closure reed switches are installed on another disk along the direction of movement, one of the contacts of which is connected to the reading unit, is opened and opened with a shift relative to the enlarged reed switches , and their contacts are connected in series with the contacts of the corresponding closing reed switches and reading unit. FIG. 1 shows the structural diagram of the device; in fig. 2 - the work of the proposed Converter. The converter contains (Fig. 1) a disk 1 connected to a controlled object (not shown), on which are standing permanent magnets 2, oriented towards each other by the same poles, a fixed disk 3 with closing 4 and opening 5 reed switches connected in series with the measurement unit 6. The opening reed switches 5 are connected by one electrode to the closing reed switches 4, and the other electrode - to the measuring unit 6 and are located relative to the main reed switches 4 with displacement along their axis. The opening reed switches can be moved when setting the triggering zone, and then fixed. The pitch of the magnets 2 on the disk 1 is chosen equal to “ZbO where Gn is the number of magnets, the Pitch of each pair of reed switches with contact groups of the opposite type on the disk 3 is chosen equal to -0. Where K is the number of pairs of reed switches of the opposite type. For small disc diameters 1 and 3, the reed spacing is assumed to be equal. The converter works as follows (fig. 2a) to the hermetic approach of the magnet at the boundary p it triggers and imposes into the measurement circuit a pulse, the duration of which from the reed switch 4 (in angular units) is determined by its release limit b (fig. 26). At the approach of the next magnet. III to the next reed switch 4, another impulse arises, the duration of which is determined by the release limit b of the reed switch 4. In this case, the pulses would be wide; with a small interval between them (Fig. 26), and sometimes they would merge. But each time the magnet approaches the actuation facets with,., From the reed switches 5, the pulses are interrupted, as a result of which the pulses are clearly divided (Fig. 2c), since b,.,. -Lv reading unit 6 receives one pulse, and in one complete rotation N - GP-k pulses arrive, for example, as shown in FIG. 1 converter 30 pulses. The electrical pulses generated by each pair of reed switches 4 and 5 are fed to the input of the readout unit 6, for which an electrical pulse counter can be used. The economic effect of using the proposed sensor can be achieved by increasing its reliability and measurement accuracy, simplifying the design and reducing operating costs. Claims. Utap rotation transducer into a code containing a disk on which permanent magnets are placed, along which closure reed-switches are installed along the movement direction on another disk, one of the contacts of which is connected to a readout unit, characterized in that, in order to increase the reliability and simplify the construction of the transducer , it opens breaking reed switches, which are installed with a shift relative to closing reed switches, and their contacts are connected in series with the corresponding contacts of the closing locks erkonov and the reading unit. Sources of information referred to in the examination 1. The author's certificate of the USSR № 399897, cl. G 08 C 9/04, 16.11.70. 2. USSR author's certificate number 449362, cl. G 08 C 9/04, 07.16.73 (prototype). ue. /   o ff d f about with about ffT about with / e. yo