SU447669A1 - Adjustable primary clock - Google Patents

Description

The invention relates to adjustable primary clocks used in electric hourly systems with readings corrected by reference frequency (accurate time) signals. Known are adjustable external watches that contain a time signal sensor, 1eugel Greto TorG motor position sensor with a contact, fixed on one of the gearbox axes, a correction signal sensor. To adjust the angular position of the motor shaft, a clock is provided with a heart rigidly mounted on one of the axes of the gearbox, which is acted upon by an electromagnet when the winding of the latter is excited. When a signal arrives at exactly the time, a relay is triggered, turning on the power to the electromagnet winding, the switch of the latter moves the lever, strikes the heart, forcing it, and thus the motor shaft, to take a certain angular position at which the stroke error is zero. The reducer and the associated motor shaft position sensor experience significant shock loads during this, which is the reason for their rapid exit from jstro. 1 The purpose of the invention is to increase reliability. For this, in the proposed device, the time signal sensor has two outputs at different frequencies, to which you connect .1 the first two inputs of the elements AND, connected-. their outputs with the motor winding through a series of: OR-AND elements, the second inputs of the AND circuit are connected to the corresponding outputs of the first trigger, to one of the inputs of which the sensor of corrective signals is connected via a serial chain consisting of I-NO elements to the element NO is connected to the element AND of the first chain through the third consecutive chain of the element AND and the second trigger connected via a different input to the output of the I-reversible counter to the input of the counting-down reversible counter ka included the output of the element I from the third sequence of the chain, to the .-: direct count input - the low frequency output of the time signal sensor, the input of the zero setting. - a position sensor contact, also connected to the second input of the first trigger — the second input of the NO element and one of the inputs of the third trigger, the other input of which is connected to the counting output of the reversible counter, and the outputs respectively to the inputs of the AND elements in the second and third chains . The drawing shows a block diagram of the proposed primary clock. The clock contains a stepper motor 1, connected via a gearbox (not shown) with a cam 2 position sensor, which has one normally open contact 3 connected to a power source (not shown). Motor winding through a serial chain: the element AND 4 - the element OR 5 - the element AND 6 is connected to the output a. signals of the normal frequency (for example, 1 Hz) of the sensor 7 of the time signals and through a sequential chain: element AND 4 element OR 5 - element I8 with an output (T signals of increased frequency (for example, 2 Hz) of the same sensor. Sensor 7 is a crystal the divider from which signals with different frequencies can be obtained by removing them from different divider stages. The second inputs of elements 6 and 8 are connected to the outputs of trigger 9. The inputs of this trigger are connected: one with pin 3 and the other through element 10 and element NO 11 with a signal sensor The second input of the PI 4 element is enabled by its output trigger 13. One input of this trigger is connected to the output of the reversible counter 14, and the other through I element 15 to the output of the NO element 11 Direct input the count of the counter 14 is connected to the output of the sensor 7, the input of the reverse counting with the output of the element And 15, and the input of the zero setting - with contact 3. The second input of the element NO 11 and one of the inputs of the trigger 16 are also connected to the latter. The second input of the trigger 16 connected to the output of the reversible counter 14, and its outputs are with the inputs of elements And 10 and 15. In the absence of an error, the angular position of the motor shaft 1 in its winding receives the pulses of the normal frequency (1 Hz) through the elements 6, 5 and 4. Signal flow through element 6 depends on the state trigger 9 defined by periodically closing contact 3 (for example, once per minute), and passing the signal through element 4 from the state of trigger 13 defined by the signal from the zero output of the reversing counter 14 at the counting cycle repetition rate, for example 0.25 HZ. In this case, the correction signal does not enter the device, since the second input of the element NO 11 already contains a signal to prohibit its passage from contact 3. The operation mode of engine 1 remains unchanged. If there is a negative error in the angular position of the motor shaft, the signal of correction from the sensor 12 passes through elements 11 and 10 to the trigger input 9. The latter changes its state, thereby prohibiting the passage of signals of the normal frequency (1 Hz) and allowing the passage of signals of increased frequency (2O Hz) on the motor winding through a series of elements 8.5 and 4. At the same time, the motor shaft rotates rapidly until trigger 9 is switched by the cam 2 by switching the trigger 9, which will again allow Into the winding of the motor 1 pulses of the normal frequency (1 Hz) through elements 6, 5 and 4. If there is a positive error in the angular position of the motor shaft 1, the contact closure 3 by the cam 2 precedes the arrival of the correction signal. A signal is generated by which the reversible counter 14 is transferred to the error reference state. At the input of the direct counting signal 14, pulses of normal frequency (1 Hz) are received for recording in its memory. Simultaneously with the signal at the closing and contact 3 trigger 16; switches to the state permitting passage through element 15 of the correction signal from element 11 to trigger 13 and prohibit the neck from passing this signal through element K.) to trigger 9, i.e. to motor winding 1 through elements 6, 5 and 4 to - still, normal frequency (Iru) pulses. The time interval between the closure of contact 3 and the moment when correction signals start from the sensor 12 to the input of element 11 corresponds to a positive angular error of the motor shaft. This engine is stopped at this time. Stop occurs at the time of post and laziness of the correction signal, which, after

through element 4 and 11 and 15, switches trigger 13 to the state that prohibits the posting of pulses to the motor winding 1. Simultaneously, the reversible counter 14 by the correction signal from the output of the element 15 switches to the state of counting back the time information recorded in its memory from the moment of contact closure 3, and after completion of the complete reading at the zero output, the counter 14 generates a signal that switches the trigger 13 to a state in which the prohibition of the passage of the normal frequency pulses (1 Hz) to the motor winding is removed. 1, and the latter is restarted.

The positive error of the angular position of the shaft 1 of the engine 1, which can be eliminated by the proposed device, is determined by the memory capacity of the reversible counter 14 and the selected closing period of the contact 3 of the position sensor.

Thus, the proposed adjustable primary clocks make it possible to adjust the time readings: while avoiding mechanical effects on the gearbox and position sensor, the negative error is eliminated by accelerating the engine shaft, and the positive error by stopping the engine shaft for a time interval equivalent to an error.

Subject invention

Adjustable primary clock containing a time signal sensor, motion6

A reducer, on one of the axes of which a motor shaft position sensor I, a correction signal sensor, a reversible counter, logic 5, AND, OR, NO and trigger elements (for example, to enhance reliability, The time signal sensor has two outputs to different frequencies to which the first are connected.

0 two inputs of elements AND, connected by their outputs with the motor winding through a series of elements OR - AND, the second inputs of circuits AND are connected to the corresponding outputs of the first trash, to one of the inputs of which is connected a sensor of correction signals through a series of AND - NO, in which the element NO is connected with the element AND of the first chain through the third sequential chain of the element AND and the second trigger connected via a different input to the output of the reversible counter, to the input back Reversible counter counting on

5 And from the third sequential chain, to the input of the direct count is the low-frequency output of the time signal sensor, to the zero input input a position sensor contact also connected to the second input of the first trigger, the second input of the NO element and one of the inputs of the third trigger, the other input of which included on the output of the reversible counter, and the outputs - respectively. on the inputs of the elements And in the second and third

chains.