SU1247669A1 - Device for indicating weight - Google Patents

Abstract

The invention relates to weighing equipment and allows to expand the field of application of the device, which contains a source 1 of two-phase supply voltage, selsyns-phase arrays 2 and 5, low-pass filters 3 and 6, zero-organs 4, 7, 8 and 9, drivers pulses 10 and 11, address type 12 multiplexer, random access memory 13, microcomputer 14, multiplexer 15, counter-shaper 16 codes, counter-divider 17, and generator 18 rectangular pulses. The introduction of new elements and the formation of connections between the elements of the device allows simultaneous operation with several dial weight indicators. 1 il. from o (L to 4 Od Oi "BUT

Description

The invention relates to weighing equipment, in particular, display and recording devices, intended for use as part of weighing devices.

The purpose of the invention is to expand the field of application by providing simultaneous operation with several dial weight indicators.

The drawing shows a block diagram of a weight display device.

The device, Weight Indicator, contains a source (generator) 1 of a two-phase supply n-apr, the first selsyn-phase shifter 2 connected through the first low-pass filter 3 to the first null organ 4, additional selsyn-phase shifters 5 connected via additional lower filters frequencies 6 to additional null organs 7, second 8 and third 9 null organs, shapers 10 pulses, shaper 11 reference pulses, multiplexer 12 addresses.

random access memory

(RAM) 13, microcomputer 14, multiplexer 15 signals, counter-shaper code 16, counter-divider 17 and generator 18 rectangular pulses.

The source 1 of the two-phase supply voltage is connected to the inputs (to the stationary windings — the first selsyn-phase shifter 2, additional phase-shifting syphilists 5 and to the inputs of the second 8 and third of its 9 null organs are not shown.

The outputs of all drivers of 10 pulses are connected to the inputs of the multiplexer 15 of the signals, the output of which is connected to the first input of the RAM 13.

The output of the third zero-body 9 through the pulse shaper 11 is connected to the first (control) input of the counter of the shaper 16 of the code, the second (counting) input of which is connected to the second output of the counter-divider 17.

The generator of 18 rectangular pulses is connected to the input of the counter-operator 17.

The first output of the counter-divider 17 is connected to the control input of the signal multiplexer 15 and to the first address multiplexer 12 of the address, the output of which is connected to the third input of the RAM 13.

The second input of RAM 3 is connected to the output of the counter-driver 16 code, and the output of RAM 13 is connected to the input (

0

five

0 s

0

five

0 5

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n data) MiiKpci M M Ut, the first and third of which the outputs (control bus and gvdres bus) are connected to the second and third inputs of the multiplexer 2 addresses respectively.

The device works as follows.

Sinusoidal voltage from source 1 is supplied to parallel-connected windings of stators of selsins 2 and 5 operating in a phase shifter mode, the rotor axes of which are directly connected to the axis of the arrows of the corresponding dial gauges (not shown), which ensures the transfer of the angular position of the arrows on the selsyn phasers 2 and 5. The output voltage of a sinusoidal form from selsins 2 and 5 is passed through filters 3 and 6 of the lower frequencies, to the outputs of which zero-organs 4 and 7 are connected respectively. The outputs of the zero-organs 4 and 7 are rectangular-shaped pulses whose front coincides with the moment of polarity change of the sinusoid from minus to plus. The pulse shapers on the front of the pulses coming from the null organs 4 and 7 form pulses of a certain duration. From the output of the imaging unit 11 reference impulses connected to the null organ 9, reference impulses arrive. The phase shift between the reference pulse and the pulses from the formers of 10 pulses is proportional to the weight of the material being metered. The zero-organ 8 and the corresponding pulse shaper 10 are used to measure the phase shift of the meliodes with sinusoids of the supply voltage.

During one conversion period, pulses are received at the input of multiplexer 15 from each generator 10, with the phase shift between each of them and the reference pulse proportional to the rotation angle of the rotor of the corresponding selsyn 2 or 5.

Square-shaped pulses from the generator 18 are continuously fed to the input of the counter-divider 17, the division ratio of which must be no less than the number of drivers 10 connected to the multiplexer 15. The outputs of all bits of the counter 17 are connected to the address input of multiplexer 1 5 and through the multiplexer 12, to the address input of the RAM 13. Since the counter 17 operates continuously, the multiplexer 15 commutes to its output successively the outputs of each generator 10. Each driver 10 or its corresponding selsyn 2 or 5 receives a gesture cue number or address depending on which input of the multiplexer 15 is connected to.

The high bit of the counter 17 is connected to the low bit of the counter 16, U on which the code of the angle of rotation of the dial pointer is formed. With such a connection, the contents of counter 16 are increased by one only when the number of pulses equal to the division factor is input to the input of counter-divider 17. Thus, during one cycle of the SC, during which the multiplexer 15. commits successively each of its inputs to the output; the contents of counter 16 remain unchanged. An increase in the content of the counter 16 per unit is carried out during the transition to the next cycle,

The signals from the output of the multiplexer 15 are fed to the first input (recording control input) of the RAM 13,

If at some point in time

the input of multiplexer 15 is supplied with single30 voltage, output through a filter or several signals from drivers 10, then during time f they are sequentially received through multiplexer 15 to RAM 13 and record the contents of counter 16 into RAM 13 at co-35 addresses corresponding to them, In the limiting case, when signals from all drivers 10 are simultaneously received at the input of multiplexer 15, a code 40 is written at each address of RAM 13 proportional to the angle of rotation of the dial pointer arrows. Thus, during one conversion period in the RAM 13, the information about the rotation angle of the arrow 45 of each dial indicator is recorded. Reading information from the RAM 13 to the microcomputer 14 can be performed in each conversion period during the time corresponding to the dead 50 zone of the scale. The information is merged from the RAM 13 into the microcomputer 14 by supplying a control signal to the second input of the multiplexer 12, which is used to switch the address 55 of the exposed microcomputer 14, to the address inputs of the RAM 13. At the output of the RAM 13, the angle information

the low frequencies are connected to the first g null organ, to the mountain and the third null organs, to the inputs connected to the two-phase supply voltage source, signal multiplexer, square pulse generator, code driver and microelectric meter, characterized in that fields of application; additional phase converters in a given quantity are introduced into it, whose inputs are connected to a two-phase supply voltage source, additional low-pass filters and zero-organs, to which additional The lower frequencies are connected to the rotor windings of additional selsyn-phase shifters, pulse formers connected by inputs to the outputs of the first, second and additional zero organs, and outputs to the multiplexer inputs of the signals, driver, and reference pulses through which the output of the third zero body is connected to the first input of the counter-generator of the code, the counter-divider, to the input of which the generator is connected

turning the dial indicator, whose number coincides with the address given to RAM 13; Going through the addresses of dial indicators, the microcomputer 14 reads digital codes proportional to the angles of rotation of the dial pointer arrows at a given time.

In addition, the microcomputer 14 reads a code proportional to the phase angle of the supply voltage, since the zero organs 4 and 7 and the corresponding drivers 10 connected to the input of the multiplexer 15 generate write pulses on the RAM 13. This information is used in microcomputer 14 to calculate an error depending on the oscillation frequency and phase of the supply voltage generator,

Claims (1)

Invention Formula A weight display device containing a selsyn phase shifter, the rotor of which is kinematically connected with the axis of the arrow of the dial weight indicator, the stator winding, whose input is connected to a two-phase supply voltage, output through a filter low pass is connected to the first g null organ, the mountain and the third null organs, the inputs connected to a two-phase supply voltage source, a multiplexer of signals, a square pulse generator, a codeforming counter, and microelectronics, characterized in that fields of application, additional selsyns-phase shifters in a given quantity are introduced, the inputs of which are connected to a two-phase supply voltage source, additional low-pass filters and zero-organs, to which through additional low-pass filters rotor windings of additional selsyn-phase shifters, pulse drivers connected by inputs to the outputs of the first, second and additional zero, respectively, and outputs to the multiplexer inputs of the signals, driver of the reference pulses, through which the output of the third zero-body is connected to the first input of the counter-generator of the code, the counter-divider, to the input of which a generator is connected . S1247669 .6 square of pulses, to the first worldviewer code, and to the output. - input Bbixojby is the address input of the multiplex, microcomputer, and address multiplexer, signal pa, and to the second output, the second input of which is connected to the first input of the codeformer counter, v output, counter a-divider, auto-operative memory, swarm and the third inputs are connected to the wiho to the first input of which the microcomputer has been connected, and the output is connected to the output of the multiplexer signals, to the third input of the operational memory, to the second input - the code output of the counter-for- mation device.