SU887405A2 - Device for monitoring lift cage position in shaft - Google Patents

Description

laziness in the mine steel shunts overlap the ends of the magnets.

The device works as follows.

In the absence of shunts, end magnetic fluxes F and, F2 pass through each reed switch, which for the reed switches are longitudinal {Fig. one). At the same time, the flux F1 from the near magnet is larger than the flux Fa from the far magnet, but so much so that the difference in fluxes DF F1 – F2 is able to hold the reed switch in the closed position, but not the molset to transfer it from the open position to the closed one. This is achieved according to its installation of reed switches.

Due to this, after any commutation, the gyrrokes retain their position, i.e., they have a memory (under the influence of any external influences).

Bringing a steel shunt to the end of a magnet weakens the end flux of this magnet, since part of this flux closes through the steel shunt, i.e. the flux F1 (or F2) splits into two fluxes F / and F / (Fig. 1). A change in the magnetic flux in the air gap between the ends of the magnets causes a change in the magnetic induction in the gap and, consequently, in reed switches (Fig. 3, a). In the absence of shunts, the magnitude of induction B in the gap changes in accordance with curve I. The value of induction in the reed switch is inside the zone of the reed switch, as a result of which the latter does not change its state.

When the shunt is brought up to the end of the magnet 2.2, the induction in the gap changes in accordance with the curve P. The value of induction in gyroelectric 3.1 at the same time exceeds the value of the Vazam closure induction, as a result of which the reed switch 3.1 is closed. In the reed switch, on the other hand, 3.2 induction becomes less than the induction value of Spa.- ™, as a result of which it opens.

When leading the shunt to the end of the magnet 2 1, the reed switch 3.2 closes and the reed switch 3.1 opens; induction in the gap varies in accordance with curve 1P.

Thus, the reed switch located closer to the magnet above which the shunt is located opens, and the reed switch closer to the other magnet closes.

Simultaneous insertion of shunts to the ends of both magnets will weaken the magnetic field in the area of the location of the reed switches, and the reed switches open (Fig. 3.6). Therefore, a pair of reed switches located between magnets with opposite magnetic zeros is a device having three stable states. Code combinations correspond to these conditions, the following: 01, 10, 00.

Two pairs of reed switches located between the upper and lower ends of the magnets (see Fig. 4) provide

9 numbers (events) in one number system.

With the help of certain combinations of shunts you can encode the floors of the building. The lowest consumption of shunts will be

If the adjacent floors differ from each other in the state of only one reed switch. An example of such a coding and for a 9-story building is given in FIG. 2. The shunt column indicates the location of the shunts in the a, b, c and d positions (above the reed switches).

The use of the ternary number system makes it easier to co-operate the device by running it on 2 magnets.

In addition, the advantage of the device is the presence of corrective properties of the four-bit redundant code when using a combination of 01 and 10. In this case, one device can serve 4 floors, and two-16. The presence of corrective1; their code properties provide increased device reliability.

Formula and 3 about b e and e and

Device for monitoring the position of the elevator car in the shaft but aut. St. HL 751767, about tl and h and hI, ee with the fact that, in order to expand the functionality, it is equipped with a donol 1ln1) 1 reed switches, each of which is placed differently from one of the main reed switches with respect to the centerline, |, it between the end edges of the magnets.

Sources of information, irii tye vnnmashge nri expertise

1. USSR author's certificate 751767, cl. In 66В 3/02, 05.10.78.

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Claims (1)

Claim Device for monitoring the position of the elevator car in the mine by ed. St. Al · 751767, characterized in that, in order to expand the functionality, it is equipped with additional reed switches, each of which is placed symmetrically to one of the main reed switches relative to the axial line passing between the end edges of the magnets.