SU1153239A1 - Device for measuring and recording weight in dynamics - Google Patents

Abstract

I DEVICE FOR WEIGHTING REGISTRATION IN A DAMAGE containing a weighing sensor, reversible zero counters and measurements with code-voltage transducers, the outputs of which and the load of the weighing sensor are connected to the inputs of the comparison element, the output of which is connected to the first zero-input of the body, the first and the second outputs. Which are connected respectively to the buses. Addition and Subtraction of reversible zero and measurement counters, a zero setting unit, the output of which is connected to the input of a reversible zero counter, the distributor register Connected with the decoder, through which the outputs of the reversible measurement counter are connected to the output device, the generator whose output is connected to the input of the frequency divider and the input of the high and medium speed keys, the low speed key, the first, second and third inputs connected, respectively, to the output of the medium speed key, the first output of the frequency divider and the input of the registration distributor, and the outputs of the low and high speed keys are connected to the counting inputs of the reversible meter A coarse disequilibrium signal, the input of which is associated with the output of the reference element, and an equilibrium block, the first input of which is connected to the bus Subtraction, while the first output of the coarse non-equilibrium signaling device is connected with the control of the high-speed switch input, characterized by By the fact that, in order to improve the measurement accuracy by increasing the noise immunity, the addition and subtraction keys were entered into it (L and dimming, a trigger for the speaker, an input connected to the output of a dynamic dynamics counter, a reverse switch, the first the input of which is connected to the first output of the dynamic trigger, the second input of the reverse switch is connected to the bus Subtraction, and its output is connected to the second input 00 of the null organ, the prohibition key, the first ke input of which is connected to the second output of the trigger and the second input-hr, equilibrium unit, the second input of the inhibit key is connected to the bus Subtraction and the first input of the subtraction key, and the output of the inhibit key is connected to the first input of the blanking key and the second input of the subtraction key, the third input of which is connected to the second output of the frequency divider , the first output of which is connected to the first input of the key of additions, the second input of the cotr is connected to the bus Addition, an exact stop trigger, the first input of which is soy

Description

| dinene with an equilibrium output, and the Reset Exact Stop Trigger is connected to the Registration Bus, J, and the Exit Trigger Trigger Output is connected to the output of the registration distributor.

2. The device according to Claim 1, of which it is, that the D-trigger of the pre-restraint is entered into it, the R- and S-inputs of which are connected respectively with the second output of the gross imbalance alarm and the bus Addition or Subtraction, and the first and the second output of the D-flip-flop of the pre-calm is respectively connected to the control input of the medium speed key and the third input of the equilibrium unit.

3. A device according to Claim 1, different from the fact that a reset circuit is introduced in it, the first and second inputs of which are connected to the Zero and Overflow outputs of the reversible dynamics counter respectively, and the third input of the reset circuit is connected to the bus Addition, while the output of the reset circuit is connected with the input of the R-speaker triggers and the second input of the key is about

 The invention relates to weighing technology and can be used when weighing loads in conditions of low-frequency dynamic interference.

An automatic weighing device is known that contains reversible zero counters and measurements with code-voltage transducers, the outputs of which, together with the sensor, are connected to the input of the comparison element, the output of which is connected to a zero-body, the outputs of which are connected to the inputs of the reversible counter- Addition and Subtraction, a pulse generator connected to the 5th counting input of the reversible counter zero via a controlled key and to the counting input of the reverse metering counter via the compensation speed control circuit and, to the inputs 20 of which are connected the outputs of the counter of the transitions of the compensation state, connected to the counting input of the latter through a coincidence circuit and a prohibition circuit, the second input of which is connected to the subtraction input of the reversing 1x counter, the output device and the digital printing machine through the decoder and the selection circuit code on the bit commutated with reversible 30 zero and measurement counters, gross imbalance alarm, controlled equilibrium circuit and resolution circuit 51

However, the described device harak-35 is not accurate enough.

when weighing the load in the conditions of dynamic noise such as rolling with a limited measurement time.

Closest to the invention is a device for recording the weight in dynamics, containing a weight measuring sensor, reversible zero counters and measurements with code-voltage transducers, the outputs of which and the output of the weighing sensor are connected to the inputs of the reference element whose output is connected to the first input zero-organ, the first and second outputs of which are connected respectively to the buses. Addition and Subtraction of reversible zero counters and measurements, a zero-setting unit whose output is connected to the input of a reversible counter. and zero, the registration distributor, which is connected with a depressor, through which the outputs of the reversible meter are connected to the output device, a generator; The driver of which is connected to the input of the frequency divider and the input of the high and medium speed keys, the low speed key, the first, second and third inputs of which are connected respectively to the output of the medium speed key, the first output of the frequency divider and the input of the registration distributor, and the outputs of the low and high keys at speed, they are connected to removable inputs of a reversible meter of measurement, a gross imbalance alarm. A 3n input is associated with the output of the reference element and an equilibrium unit, the first input of which is connected to the Subtraction bus, while the first output of the gross imbalance signaling device is connected to the control input of the high speed switch 2. The shortcoming of the known device is low measurement accuracy, due to the lack of noise immunity from dynamic interference. The purpose of the invention is to increase the measurement accuracy by increasing the noise immunity. The goal is achieved by the fact that a device for recording dynamic weight, containing a weighing sensor, reversible zero counters and measurements with code-voltage transducers, the outputs and output of the weighing sensor are connected to inputs comparison element, the output of which is associated with the first input of the zero-body, the first and second outputs of which are connected respectively to the buses Addition and Subtraction of reversible counters n The measurement and installation unit, the zero output of which is connected to the input of the revolving counter zero, the registration distributor, connected to the decoder, through which the outputs of the reversible measurement counter are connected to the output device, the generator whose output is connected to the input of the frequency divider and the input high and medium speed keys, low speed key, the first second and third inputs of which are connected respectively to the output of the average speed key, the first output of the frequency divider and the input of the distributor radios, and low and high speed key codes are connected to the counting inputs of the reversing meter counter, a gross imbalance signal, the input of which is connected to the output of the reference element, and an equilibrium unit, the first input of which is connected to the bus Subtraction the coarse disequilibrium is connected with the control input of the high-speed key; the keys for pulling, subtracting and quenching are entered; the trigger of the dynamics, the input of which is connected to. In the code of the reversible counter of the dynamo, the reverse switch, the first input of which is connected to the trigger trigger, the second input of the reverse switch is connected to the bus Subtraction, and its output is connected to the second input of the zero-organ, the prohibition key, the first input of which is connected to the second the output of the trigger of the dynamics and the second input of the equilibrium block, the second input of the inhibit key is connected to the busbar Subtraction and the first input of the subtraction key, and the output of the inhibit key is connected to the first input of the blanking key and the second input of the subtraction key The second output of the frequency divider, the first output of which is connected to the first input of the addition key, the second input of which is connected to the bus Addition, an exact stop trigger, the first 5th input of which is connected to the output of the equilibrium block, and the input Reset of the exact stop trigger with the Registration bus, with the exact stop trigger output connected to the registration distributor input. The device may include a C-flip-flop, the presets R and S, whose inputs are connected respectively with the second output of the gross imbalance detector and bus Addition or Subtraction, and the first and second outputs of the D preset trigger, respectively, are connected to the control input of the average speed key and the third input of the equilibrium unit, or the reset circuit, the first and second inputs of which are connected respectively to the outputs Zeroing and Overflow of the dynamic dynamics counter, and the third input of the reset circuit is connected to the Compound bus e, wherein the output of the reset circuit is connected to the second h input of the R-trigger of the speaker and the second input of the damper key. This makes it possible to increase the measurement accuracy under the action of dynamic noise. FIG. 1 is a block diagram of the device described; Figs 2.3 and 4 are block diagrams of the individual elements incorporated in the device; Fig. 5 shows timing diagrams explaining the principle of its operation. A device for recording weights in dynamics. Contains reversible counters 1 and 2, respectively, zero and measurements connected by means of a pre-comparison element 5, to the input of which the weight measuring sensor 6 is connected, and to the output of a null organ 7 whose outputs are buses Addition and Subtraction are reversible counters 1 and 2, generator 8, frequency divider 9, keys 10.11 and 12 respectively high, medium and low speed, coarse imbalance alarm 13, D-flip-flop 14 precondition, keys 15 and 16 addition and subtraction, through which inputs are connected + (addition) and - (subtraction) of the reversive counter of the 17 speakers, with the R-input of which through the prohibition key 18 and the suppression key 19 are connected to the outputs respectively of the dynamics trigger 20 and the reset circuit 21, the other output of the dynamics trigger 20 22 reverse movement associated with null-organ 7 dynamics prohibition key 18, damper key 19, dynamics trigger 20, circuit 21 reset key 22 reverse motion To the 5 inputs of an exact stop trigger consisting of logic elements 23 and 24 are connected output zeroing counter 17 and the output of unit 2 equilibrium, the inputs of which are connected to the bus you Feeding the outputs A and B, respectively, the trigger 20 and trigger 14 speakers preduspokoeni. The output of the logic element 24 is connected to the input of the registration distributor 26, the outputs of which are controlled by the decoder 27 transmitting the code of the reversible counter 2 of the measurement to the output device 28, the zero setting unit 2. The equilibrium unit 25 may contain for example (Fig. 2, the counter 30, whose selected outputs through the matching circuit 31 and the key 32, to the other input of which the Subtraction bus is connected, are fed to its counting input C To the blanking bus R of the counter 30 through the switch 33 Triggers 14 and 20 of Pre-restraint and Dynamics The reset circuit 21 may contain, for example, (FIG. 31, circuit 34 OR, through an inverter 35 connected to the R input of the D flip-flop 36, whose input C is connected to the bus. Addition. Zero interaction organ 7 and the key 22 of the reverse direction shown in figure 4 "zero-body 7 consists, for example, | Of the operational amplifier 37, the transistor driver 40, the trigger 41 with the output switches 42 and 43. The output of the reverse switch 22 is connected to the 2-input of the G-flip-flop 41. A device for recording the weight in the dynamics works as follows some moment of time loading the weighing sensor 6 according to position 6-1 (Fig.5) "A gross imbalance 13 triggers (position 13 / and through the high speed switch 10 (position 10; A pulse train passes to the input of the third decade of the reversible counter 2, the compensator has an imbalance at the level of a hundred s. Simultaneously, the compensating pulses through the medium speed keys 11 and the low speed key 12 are fed to the input of the first decade of the reversing counter 2 pre-restraint upon reaching equilibrium at the level of units and the operation of the zero-organ 7 (position 11, fig. 5). Pulses from the exit of the low-speed switch 12 continue to arrive (position 12, FIG 5 before the Registration command. Position 7-1 shows the potential of the bus Subtraction, which switches out in the absence of damping triggers of the triggers 14 and 20 (FIG. 2)) filling the counter 30 equilibrium block 25 When block 25 reaches equilibrium of a selected code, for example, 12 equilibria (position 25, fig.5 and 2), applying the Registration command (fig.1, p) an exact stop trigger on the logic elements 23 and 24 starts the distributor 26, reversing code transmission If the output voltage of the weighing sensor 6 oscillates around a certain equilibrium state to be measured (position 6-2, figure 5), then under the condition that 2An A, where is the frequency of filling the reversing counter 2; AP and l are, respectively, the amplitude and frequency of the dynamic disturbance, the slope of compensation is somewhat less than the slope of the disturbance front and the output voltage of the bus. The addition of the zero-body 7 corresponds to position 7-2 (Fig 5), T. near (in time) from extreme mobile interference " , 5, S, there are several false equilibrium states a, 6, 6, and Tod. The registration in these conditions of the code of the reversible counter 2 by the command of the equilibrium block 25 (as can be seen from the simultaneous consideration of positions 6-2 and 7-2 of FIG. 5) would lead to an error, since the registration could take place, for example, in points the extremum of the interference b or c, when the code of the reversible counter 2 differs significantly from the genuine, equilibrium one, wherein the described device operates as follows under the specified conditions. At every positive impulse. bus Addition zero-organ 7 of the packet a (position 7-21 through key I5 add on ix For reversing the dynamics counter 17, the pulses are received, shown at position 15 in the form of a pack q. However, before triggering dynamics 2, each positive bus pulse subtracting the zero-body 7 locks the subtraction key 1 and blanks the counter 1 keys and 18 in this way. , with frequent bus operation, the addition and subtraction of a null organ 7, which has a month at the real (position 7-IJ or false (position 7-3) equilibrium, the counter 17 dynamics in the regime of zero-organ 7 addition is filled with frequency pulses divide L are often 9, and in the Subtraction mode, the contents of counter 17 is off, and the dynamics trigger does not have time to work. With long-term dynamic interference, after a number of false equilibria, a long state of Addition B follows, as before, the reversible counter 1 begins to be filled with pulses D with a frequency {through key 15 of addition). When counter 17 reaches an ejected code (for example, 4 pulses, trigger 20 of the dynamics 1 98 (position 20) is activated, the output of which A through the prohibition key 18 prevents the potential of the bus. Subtracting the zero authority 7 to reset the counter I7 and locking the subtracting key I6. Therefore at the moment of time i, Addition mode, the reversible counter 17 starts to empty through the key 16 by pulses of frequency divider 9 with frequency 2 f respectively (position 16) At time tj, the counter 17 is zeroed and from its output O a pulse arrives at input 5 23 and to the reset circuit 21 (position 17). If a P signal (Registration) is present at the input of the element 24, an exact stop trigger is triggered, the distributor 26 is started and the reversible counter code 2 is registered by the output device 28, Trigger 36 of the reset circuit 21 (FIG. 3 from the zero reset output, it is reset to its initial position, counter 17 and trigger 20 are extinguished through key 19. If dynamic interference is excessively large, then counter 17 (phYoZ) also replenishes the pulse from the tire, trigger 20 and the counter 17 through key 19. In general, it is possible to select the level of dynamic interference, in which it is still advisable to measure. By selecting the capacitance of the counter 17 and the filling frequency on a real object, you can make sure that with the greatest dynamic interference, the counter 17 and the trigger 20 are reset, and with a certain average dynamic measurement. Thus, if there is sufficient dynamic noise, the dynamic counter 17 in the Compound mode is filled with frequency pulses f, and in the Subtraction mode it is emptied by frequency pulses 2 until an impulse appears on the bus. Resetting “The most important element guaranteeing an accurate measurement under any conditions is Key 22 is reversing, connected by inputs to the bus. Subtracting the zero-body 7 and to the output of the trigger 20 of the speakers. The output of the reversing switch 22 is connected to a null organ 7 (for example, as shown in FIG. 4 K. When an unbalance occurs at the input of the operational amplifier 37 on), a single or zero signal appears at the output of the output trigger 41 (depending on unbalance sign). Three ger 41 is set by gating pulses to one of the addition or subtraction positions. Key 22, triggered by matching the outputs of the trigger 20 of the dynamics and the bus. Subtraction fixes the bus. Subtracting the null organ 7 before zeroing the counter 17 of the dynamics and resetting the trigger 20о. Thus, at time i (FIG. 5, position 15 when the institute of the Subtract mode is subtracting this mode fixed by the return key 22 until time ij, i.e. until the dynamics counter 17 is zeroed and the measurement terminal is finished (sit 16,17 and 22). V.. Using the key 22 is equivalent to returning along the time axis (position 7 -2) from the moment -t to the middle of the interval D of the long-term dynamic Indeed, in the interval D, the Add mode operates and, therefore, at the point t, the code of the reversible counter 2 exceeds the equilibrium value of the measurand. To register this equilibrium value, it is necessary that, firstly, the reversible counter 2 be filled after time t, with the same speed as in the interval B, and secondly, instead of the Addition mode t., - tj constant n in the time interval but there was the Subtraction mode. So, if the dynamic disturbance And took place and it is not excessively large, then the measurement consists, as it does not matter what will happen after it (false equilibria, as in position 7-2 or change of the interference front. The proposed device works well with dynamic disturbances of very low frequencies Cl Hz and below), which is its most important advantage, is not 1M for known (without integrator use). Moreover, the device allows measuring and recording weight in dynamics at a sufficiently high level of interference and (as shown by Test Ata) it at a sufficiently low frequency of the order of GHz or lower.

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Claims (3)

I „DEVICE FOR DATA RECORDING WEIGHT, containing a load cell, reversible zero meters and measurements with code-voltage converters, the outputs of which and the output of the load cell are connected to the inputs of the comparison element, the output of which is connected to the first input of the zero-organ, the first and second outputs of which are connected respectively to the buses Addition and Subtraction of reversible zero and measurement counters, a zero-setting unit, the output of which is connected to the input of a reversible zero counter, a registration distributor, time Ryadno switched to the decoder through which the outputs reverse? measurement counter connected to the output device, the generator, the output of which is connected to the input of the frequency divider and the input of the keys high and medium speed, low key fast? tee, the first, second and third inputs of which are connected respectively to the output of the medium-speed key, the first output of the frequency divider and the input of the registration distributor, and the outputs of the low and high-speed keys are connected to the counting inputs of the reversible measurement counter, the gross disequilibrium signaling device, the input of which is connected to the output a comparison element, and an equilibrium unit, the first input of which is connected to the Subtraction pin, while the first output of the gross disequilibrium signaling device is connected to the control input of the high-speed key, from which means that, in order to increase the measurement accuracy by increasing the noise immunity, it includes addition, subtraction and blanking keys, a dynamics trigger, an input that is connected to the output of a dynamic dynamics counter, a reverse key, the first input of which is connected to the first output of the trigger speakers, the second input of the return key is connected to the Subtraction ',' bus and its output is connected to the second input of the zero-organ, the prohibition key, the first input of which is connected to the second output of the .dynamic trigger and the second input ~ \ the equilibrium block , the second input of the prohibition key is connected to the Subtraction bus and the first input of the subtraction key, and the output of the prohibition key is connected to the first input of the blanking key and the second input of the subtraction key, the third input of which is connected to the second output of the frequency divider, the first output of which is connected to the first input of the addition key whose second input is connected to the Addition bus, an exact stop trigger, whose first первый-input is coef> ί single with the output of the equilibrium unit, and the input Reset trigger exact stop ¹ • new connected to the bus Registration,; the output of the exact stop trigger is connected to the output of the registration distributor. 2. The device according to claim 1, characterized in that, in it, a D-pre-calm trigger is inserted, the R and S inputs of which are connected respectively to the second output of the gross disequilibrium signaling device and the Addition or Subtraction bus, and the first and second outputs of the pre-assist D-flip-flop are respectively connected to the control input of the medium-speed key and the third input of the equilibrium unit. 3. The device according to claim 1, characterized in that a reset circuit is introduced in it, the first and second input of which are connected respectively to the outputs Zeroing and Overflow of the reverse dynamics counter, and the third input of the reset circuit is connected to the Addition bus, while the output of the Reset circuit is connected with the input of the R-trigger dynamics and the second input of the blanking key.