SU767802A1

SU767802A1 - Magnetic shaft angle-to-pulse number converter

Info

Publication number: SU767802A1
Application number: SU782688001A
Authority: SU
Inventors: Николай Евгеньевич Конюхов; Владимир Семенович Кочкарев; Николай Васильевич Акрушкин
Original assignee: Куйбышевский Ордена Трудового Красного Знамени Авиационный Институт Им. Академика С.П.Королева
Priority date: 1978-11-24
Filing date: 1978-11-24
Publication date: 1980-09-30

Description

Преобразователь относитс к устройствам автоматикии может быть использован дл преобразовани угла по ворота в число импульсов.jThe converter relates to automation devices and can be used to convert the angle of turn to the number of pulses.

Известен преобразователь угла поворота в код, содержащий магнитную систему, состо щую из цилиндрических зубчатых ротора, статора и магнита, причем число зубцов ротора и статора Q одинаково. При вращении ротора происходит модул -ци магнитного потокаA known angle converter is converted into a code containing a magnetic system consisting of a cylindrical gear rotor, a stator and a magnet, and the number of teeth of the rotor and stator Q is the same. As the rotor rotates, the modulus of the magnetic flux occurs.

1.one.

Этот преобразователь имеет недостаточно-высокую точность, котора .за висит от количества зубцов, увеличение их числа технологически затруднительно и приводит к уменьшению степени модул ции потока, поэтому в подобных преобразовател х конструктивные 20 особенности и технологические возможности изготовлени не позвол ют использовать их в высокоточных системах и устройствах.This converter has an insufficiently high accuracy, which depends on the number of teeth, increasing their number is technologically difficult and leads to a decrease in the degree of flow modulation, therefore, in such converters, the design features and technological capabilities of manufacturing do not allow their use in high-precision systems. and devices.

Наиболее близким к изобретению 25 по технической сущности вл етс магнитомодул ционны датчик углового, перемещени , содержащий магнитную систему и магниточувствительный элемент , размещенный в зазоре между ротором и статором, на которых нанесены зубцы, причем магниточувствительный элемент вращаетс в зазоре вместе с входным валом 2.The closest to the invention 25 is a magnetically modulated angular displacement sensor comprising a magnetic system and a magnetically sensitive element placed in the gap between the rotor and stator, on which teeth are applied, the magnetically sensitive element rotating in the gap together with the input shaft 2.

В этом датчике токосъем с чувствительного элемента осуществл етс через контактные вращающиес кольца, что снижает надежность в услови х перегрузок, вибраций, а также при измерении климатических факторов - . температура, влажность и т.п. Количество импульсов, формируемых датчиком за один оборот вала, равно количеству зубцов-полюсов ротора и статора , что ограничивает точность датчика . Кроме того, необходимость размещать в зазоре подвижнь1й магниторезистор и элементы его креплени не позвол ет получить высокую чувствительность датчика, что приводит к усложнению электронной части преобразовател .In this sensor, the current collection from the sensing element is carried out through contact rotating rings, which reduces reliability in conditions of overloads, vibrations, as well as in the measurement of climatic factors -. temperature, humidity, etc. The number of pulses generated by the sensor in one revolution of the shaft is equal to the number of teeth-poles of the rotor and stator, which limits the accuracy of the sensor. In addition, the need to place a mobile magnetoresistor and its fastening elements in the gap does not allow to obtain a high sensitivity of the sensor, which leads to the complication of the electronic part of the converter.

Цель изобретени - повышение надежности и точности преобразовател .The purpose of the invention is to increase the reliability and accuracy of the converter.

Claims

The goal is achieved by the fact that a magnetic sector consisting of a gear rotor magnet and a cylindrical stator is inserted into a magnetic transducer of the angle of rotation of the shaft into a number of pulses and a magnetic system that is placed between the gear rotor and the cylindrical stator and are offset from each other. each other by a factor multiple of the discretization of the generator, the tooth pitch of the sectors is equal to the pitch of the rotor teeth, and the magnetically sensitive elements are located in the gap between the toothed sectors and the cylindrical kim stator. . FIG. 1 shows schematically a converter (for definiteness, three sectors are shown); in fig. 2 is a section of DA in FIG. 1. The magnetic transducer of the angle of rotation of the shaft into a number of pulses consists of a cylindrical stator (mag. Nitro) 1 with a magnet fixed on it 2. A gear rotor is rigidly connected to the output axis 3. The gear sectors 5 are located between the stator 1 and the rotor 4. in the gap between sectors 5 and the stator 1, the magnet sensitive elements 6, such as magnet diodes or magnetoresistors, are fixed. Sectors 5 are shifted in the vernial relation with respect to the rotor teeth 4 n, the angle θ determined from the expression 4c (Tti), where the pitch of the rotor teeth is an angular measure; T is mrdul vernier conjugation; 1 - number of sensitive elements. The value of fp / ti determines the discreteness of the non-conjugate conjugation, i.e. the rotor tooth pitch is divided into - parts. The vernier mate module in this case shows how much the rotor tooth is covered by the angle of sector displacement relative to each other. . The magnetic flux developed by the magnet 2, closes through the serrated rotor 4, sector 5, the magnetosensitive elements b and the stator 1, the magnetic resistance of the entire track changes as the rotor rotates 4. For example, the magnetic resistance of the flux passing through H: Upper ( Fig. 2) sector 5, the smallest, since the teeth of the rotor 4 are opposite the teeth of the sector, at other positions of the teeth of the rotor, the flow resistance increases. Thus, the flow is modulated through the magnetically sensitive elements b when. the rotor 4 and the input shaft 3 are displaced. The displacement of the toothed sectors 5 in the vernial relation to the teeth of the rotor 4 ensures the displacement of the peaks of modulation of the flow passing through each. from the gear sectors 5 and, accordingly, the magnetically sensitive element b. This allows to obtain a conversion resolution less than the pitch of the rotor teeth 4. The number of teeth of sector 5 is determined structurally from the condition of providing the required sensitivity, and the pitch of its teeth is equal to the pitch of the teeth of the rotor 4. The introduction of the gear sectors into the proposed design allows you to remove the variable gear gap and set them motionless, which improves the reliability of the transducer rm. The use of several sensitive elements with sectors shifted It is possible to increase the accuracy of angle conversion, since the discreteness is determined by the number and mutual displacement of the sectors, and not just by the pitch of the rotor teeth. Increasing the accuracy and operational reliability of such angle converters allows extending the range of their practical application. Claims of Magnetic Shaft Angle Angle Converter Into a number of pulses containing magnetically sensitive elements and a magnetic system consisting of a magnet, a gear rotor and a cylindrical stator, characterized in that, in order to increase reliability and accuracy of the converter, gear sectors are introduced into it, which placed between a gear rotor and a cylindrical stator and offset from each other by an amount that is a multiple of the converter’s discreteness, the pitch of the sector teeth is equal to the pitch of the rotor teeth, and the magnetic The pressure elements are located in the gap between the toothed sectors and the cylindrical stator. Sources of information taken into account in the examination 1. The author's certificate of the USSR 519750, cl. G 08 C 9/04, 1975.

2. USSR author's certificate number 342210, cl. G 08 C 9/04, 1971 (prototype).,

FIG. f AA