CS255313B1 - Eíasiickýmagnetický čap - Google Patents

Abstract

The elastic and gland pin in its function uses the elasic magnetic effect. It is a ferromagnetic compact cylinder body. in the chamber, the same parallel holes are drilled in parallel with two parallel-axis axes of the body. series but with opposite polarity. The solution can be applied to a pressure and lag force meter with a nominal size of about 1 kN to 0000 kN.

Description

Severogrtfla, n. P. Plant 7, Most

Price 2.40 K6a

Claims (4)

SUBJECT A mixture of aliphatic azo compounds with increased thermal stability, based on azo-bis-diisobutyronitrile or azodicarbonamide containing modifiers, particularly suitable for the production of microporous plastic and rubber products, characterized in that it contains INVENTION 0.01 to 12% by weight, preferably 0.7 to 10% by weight, based on the total weight of the mixture, of triaryl phosphates and/or mixed triaryl phosphates containing 4 to 10% by weight of phosphorus, preferably 7.5 to 8.4% by weight of phosphorus. Severogrtfla, n. Mr. plant 7, Most Price 2.40 K6a CZECHOSLOVAK SQCIMISIIC to £? U ií f„ 8 X A DESCRIPTION OF THE INVENTION TO THE AUTHOR'S ACKNOWLEDGMENT 255313 (11) (Bl) xúíx 1 UWí'0 U/vH (22) Registered 23 12 85 (21) (PV 9310-85) (51) Int. Cl? G 01 L 1/12 (40) Published 15 07 37 ÚJUn r-řiO VY-NÁLEZV AND O3.ÍEVY (45) Issued 15 11 83 (73) Author of the invention MOJŽÍŠ MIROSLAV doc. ing. CSc., KOŠICE (54) Elysian magnetic pin The elastic magnetic pin uses the elastic magnetic phenomenon in its function. It consists of a compact ferromagnetic body in the shape of a cylinder. In it, in two rows parallel to the axis of the body, two equally spaced, parallel identical holes are drilled. In the holes, two parts of the excitation winding are connected in series and two parts of the sensing winding are wound in parallel with them, also connected in series, but with opposite polarity. The solution can be used to measure pressure and shear forces with a nominal value of approximately 1 kN to ?00 kN. Fig. 1 The invention solves an elastic-magnetic pin, which senses the mechanical force applied to it on the principle of elastic-magnetic Java. Existing pins that sense mechanical forces operate based on sensing the deformation of the pin using glued strain gauges. The deformation of the pin is caused by the measured strain force. The strain gauges are glued to the pin so that their axes are parallel to the axis of the pin and are connected to a bridge. This technical solution is disadvantageous for use in aggressive environments, since the adhesives used to glue the strain gauges to the pin are insufficiently reliable. The relatively small output signal requires an additional filtering device. Pins of this type are not available on our market. The sensor that measures mechanical forces is covered by AO 205 715. This type of sensor operates on the principle of the elastic-magnetic phenomenon and is intended for measuring only compressive forces. Its body consists of individual lamellas and these are parallel to the direction of the applied compressive force. The sensor contains one excitation and one sensing winding. The magnitude of the output voltage on the sensor winding is proportional to the applied force. However, the sensor can only measure the compressive force and this must be transmitted by the bearing through a precisely ground component. The contact surfaces of the sensor must also be precisely ground. However, for application in an area where it is possible to measure the force with a sl pin, it requires an additional device of complex construction, which practically excludes the possibility of its use. The above-mentioned shortcomings are eliminated by the elastic-magnetic force-sensing pin of the invention, the essence of which is that two rows of holes are formed in the cylindrical body parallel to each other, while in the upper row of holes there is an excitation and sensing winding exiting from the hole on one side of the cylindrical body and entering the adjacent hole of the same row, in the lower row of holes there is another excitation and sensing winding, while the excitation winding located in the upper row of holes and another excitation winding located in the lower row of holes are connected in series, while the sensing winding located in the upper row of holes and another sensing winding located in the lower row of holes are connected in series but with opposite polarity to each other. The proposed pin has several fundamental advantages over existing sensing pins with glued strain gauges. It has higher reliability in operation in aggressive (humid) environments. The size of the output signal is up to about a thousand times larger. This fact results in the fact that a significantly simpler apparatus is sufficient for evaluating the output electrical voltage and the evaluation is more accurate. Compared to the elastic-magnetic sensor according to the Czechoslovak Patent Office No. AO 205 715, it has the following advantages: double the detection signal, it has the ability to measure not only pressure but also tensile force, due to the differential connection of the sensing winding, its temperature error and zero drift are reduced to about one patina. The pin has greater mechanical strength and lower production cost (it does not consist of lamellas and none of its surfaces are ground. The proposed sensing pin is very easy to install, practically just replace the original one, which only performed the function of a connecting part, so its installation does not require any bearing as in the case of the elastic-magnetic sensor according to Czechoslovak Patent Application No. AO 205 715, which would require another complex construction for use instead of a pin. An example of the arrangement of an elastic-magnetic, mechanical force sensing pin according to the invention is shown in the attached drawing, where Fig. 1 shows a front view, a plan view and a side view of the pin body, Fig. 2 shows a section along the plane A—A' and B—B' and the arrangement of the windings, and in fig. 3 is the interconnection of both parts of the excitation and sensing windings The body 1 of the proposed elastic-magnetic pin (Fig. 1J is made of compact ferromagnetic material. Through circular holes 2 are formed in the body 1, their diameter is the same, the secondary holes are equidistant from each other, the axes of all holes 2 are mutually parallel and at the same time perpendicular to the plane crossed by the pin axis and the direction of the force acting on the pin. The diameter of the holes 2 is less than one sixth of the distances of the axes of adjacent holes in the same row. The holes 2 are arranged in two mutually parallel rows (Fig. 1), each row has an even number of holes 2. The excitation winding 3 (Fig. 2) and the sensing winding pass through all holes 2. 4. The arrangement of the windings is identical in each row, the windings 3, 4 pass together next to each other through the holes 2 so that their conductors emerging on one side of the body 1 enter the adjacent hole 2 on the same side of the body 1. The excitation winding 3 (Fig. 3] placed in the upper row of holes 2 (Fig. 1} and the excitation winding 3' placed in the lower row of holes 2 are connected in series with the same polarity. The sensing winding 4 placed in the upper row of holes 2 and the sensing winding 4' placed in the lower row of holes 2 are connected in series with the opposite polarity, as shown in Fig. 3. The invention can be used to measure compressive and tensile forces. The nominal value of the measured force can be selected by the geometric dimensions of the pin, in the range of approximately 1 kN to