SU1312528A1 - System for checking parameters - Google Patents

Abstract

This invention relates to analyzers used in radio measuring technology. The purpose of the invention is to expand the functionality due to the multi-channel measurement and statistical analysis of the measurement result. The system operates in two modes, autonomous and automatic from a central device. The system contains 1 parameter sensors, channel selection device 2, first synchronous detector 3, scaling amplifier 4, analog-to-digital converter 5, sinusoidal oscillator 6, second synchronous detector 7, synchronization unit 8, zero setting unit 9, mode register unit 10, computing device 11, control and memory memory device 12, random access memory 13, first interface unit 15, indicator 16, second interface unit 17, input-output unit 18, keyboard 19, alarm unit 20, unit 21 stamps. 2 Il. sh 00 00 sp o fi Phi 2.1

Description

This invention relates to analyzers used in radio measuring technology.

The purpose of the invention is to expand the functionality due to the multi-channel measurement and statistical analysis of the measurement results.

FIG. 1 is a block diagram of the system; in fig. 2 is a block diagram of a control device and firmware memory.

The system contains inductive sensors of parameters 1 |, ... ,, device 2 channel selection, the first synchronous detector 3, the massage amplifier 4, the analog-to-digital converter (ADC) 5, the generator 6 sinusoidal oscillations (power generator), the second synchronous the detector 7, the synchronization unit 8, the zero setting unit 9, the mode register unit 10, the computing device 11, the microprogram control and memory device 12, the random access memory (RAM) 13, the clock generator 14

ten

A stupa at the input of the detector 3 causes one or another input to its case to be output at its output, depending on the phase of the input signal (the phase can vary by 180 ° depending on the position of the sensor core relative to the zero position) a constant voltage of positive (phase input signal coincides with the phase of the signal at the output) or negative (phase differs by 180 °) polarities.

This constant voltage is fed to a scaled amplifier 4, where the measured signal is summed algebraically with the voltage coming from the zero setting unit 9. This allows the instrument to exhibit zero readings at any starting position of the sensor core when measuring deviations. The selection of the appropriate measurement limit for the deviation of the actual size of the product from the reference tolerance on the signals from the sensors is made in

pulses, the first interface unit 15 (the unit 20 is massaged, the amplifier 4 is supplied via the interface panel with the indicator), the indicator 16, the second interface unit 17, the input-output unit 18, the keyboard 19, the alarm unit 20, the printing unit 21.

The control unit and the microprogram memory contains a command sequence control block 22, a register 23, a semi-permanent memory block 24, a micro-command register 25, a multiplexer 26, a synchronization element 27, a first decoder 28 (source decoder), a second decoder 29 (receiver decoder ).

External inductive sensors 1 ... are powered by a power generator 6, made according to the Wien scheme and generating a sinusoidal signal with an amplitude of 3V and a frequency of 20 kHz. The signals from the outputs of the sensors are fed to the inputs of the device 2 channel selection. The choice of the number of the connected sensor 1, ... "to the measuring path is carried out automatically (4-bit code) on the information bus with

data automatically according to the measurement results using an additionally generated 3-digit code received via the data bus.

From the output of amplifier 4, the signal is transmitted to the ADC 5 for subsequent transfer to the operating device 11.

The synchronous detector 7 rectifies the signal from the power supply generator 6 and the constant voltage at its output serves as the reference voltage of the ADC 5 and the zero setting unit 9. As a reference voltage, the signal from generator 6 is used, which simultaneously enters the sensors and is thus measurable (the principle of the logometer is used), i.e., when measuring .mechanical deviations, the error is eliminated due to the instability of the signal from generator 6 The entire operation of the device is synchronized by the synchronization device 8, which produces pulses of various duration synchronous with the voltage 35

block 10 mode registers. Number 40 by washing.

Consider separately the modes of electronic zero setting, measurement of the measurement channel drift and automatic switching of the measurement limits. With the placement of the part being monitored, the tolerance parameters of which should be measured by the device, an appropriate signal is applied to the I / O unit at the mechanical basic device (not shown). By this signal, according to a rigid program, the connected sensors are connected to the measuring path, in principle, unlimited and practically determined by the required performance of the meter, i.e. the required amount of information processed, is given. my output is per unit of time from a single sensor.

The signal from the p-th sensor through the channel selection device 2 is fed to the detector 3, where it is rectified and carries out. Consider separately the modes of electronic zero setting, measurement of the measurement channel drift and automatic switching of the measurement limits. With the placement of the part being monitored, the tolerance parameters of which should be measured by the device, an appropriate signal is applied to the I / O unit at the mechanical basic device (not shown). By this signal in a rigid program, noise and interference filtering is present, present in JQ control and memory device 12.

in the input signal. A synchronization device 8 is intended to control the operation of synchronous detectors 3 and 7, as well as to clock the A / D converter 5. With the arrival at its input of the generator signal at the output of the commicroprogram, the zero is set for each displacement sensor, ll, ... ln.

The zero-setting block 9, made in the form of a DAC, delivers an analog signal from the exhauster in block-55 of digging-55 — the second input of the scaling amplifies pulses in phase matching steles 4. If the operator does not accurately set the positive half-wave harmonic of the zeroes of the sensors (the original mechanic signal from the generator 6 These pulses, as a matter of fact, setting zero manually), this is at

A stupa at the input of the detector 3 causes one or another input to its case to be output at its output, depending on the phase of the input signal (the phase can vary by 180 ° depending on the position of the sensor core relative to the zero position) a constant voltage of positive (phase input signal coincides with the phase of the signal at the output) or negative (phase differs by 180 °) polarities.

This constant voltage is fed to a scaled amplifier 4, where the measured signal is summed algebraically with the voltage coming from the zero setting unit 9. This allows the instrument to exhibit zero readings at any starting position of the sensor core when measuring deviations. The selection of the appropriate measurement limit for the deviation of the actual size of the product from the reference tolerance on the signals from the sensors is made in

0 mashtabuyushu, eat amplifier 4 through the bus

data automatically according to the measurement results using an additionally generated 3-digit code received via the data bus.

From the output of the amplifier 4, the signal is transmitted to the ADC 5 for subsequent transfer to the operating device 11.

The synchronous detector 7 rectifies the signal from the power supply generator 6 and the constant voltage at its output serves as the reference voltage of the ADC 5 and the zero setting unit 9. As a reference voltage, the signal from generator 6 is used, which simultaneously enters the sensors and is thus measurable (the principle of the logometer is used), i.e., when measuring .mechanical deviations, the error is eliminated due to the instability of the signal from generator 6 The entire operation of the device is synchronized by the synchronization device 8, which produces pulses of different duration, synchronous with the voltage 5

power supply.

Consider separately the modes of electronic zero setting, measurement of the measurement channel drift and automatic switching of the measurement limits. With the placement of the part being monitored, the tolerance parameters of which should be measured by the device, an appropriate signal is applied to the I / O unit at the mechanical basic device (not shown). According to this signal, a rigid program embedded in the control and memory device 12

microprogramme, the electronic zero setting of each displacement sensor ll, ... ln is carried out.

The zero-setting unit 9, made in the form of a DAC, supplies an analogue signal from which it leads to a reduction in this measurement limit. On display 16, points A and B of the boundaries of the established measurement limit are highlighted, for example ± 2000 µm, and the point corresponding to the mechanical position zero (B). It can be seen that in this state of the sensor core it is impossible to provide a range of + 2000 µm. For this, the electronic installation proceeds as if the point B is being reduced to the point 0. This is carried out as follows.

The coarsest range is included, for example ± 2000 µm. At the output of the zero setting unit 9, a zero supply voltage is set from the unit of 10 mode registers controlled by the control device 12 with the corresponding code. The signal from each sensor li, ... ln is measured at its initial (non-zero) position. The control and memory memory device 12 selects such a code at the input of the zero setting unit 9, i.e., the voltage at the second input of the amplifier 4, so that the measurement result at its output becomes zero. The search for such a code at the input of the zero-setting unit 9 is carried out according to the one-bit equilibration principle. The code thus set at the input of block 9 is the code of the electronic zero setting signal. This code of control unit 12 and firmware memory is stored in RAM memory 13 and in block 10 of registers. Tolean, the introduction of zero offset to the second input of the scaling amplifier 4.

The channel drift values for each range are different. Therefore, preliminarily, after the electronic installation of the zero of the nth sensor according to the program from the controller 12 and the microprogram memory, the required measurement range of the spreading amplifier 4 is turned on as follows. When the coarse (high) range on which the zero was set was switched on, the signal from the sensor was measured with the offset register entered from the unit 10 (zero setting voltages) to the second input of the amplifier 4.

15 The specified signal in the code from the output of the ADC 5 enters the computing device 11 via the information bar, where, according to commands from the control device 12, the measured code from the output of the ADC 5 is compared with the values of the signals in. each

20 range (± 2000, ± 200, ± 20 microns). If the measured value L / is less than the value of the M code of one of the ranges (the value of / V is stored in the memory of the control unit 12 and the microprogram memory), but greater than the code value of the next smaller range, then the computing unit 11 selects -th range. The control device 12 through the block 10 registers generates a command to activate the corresponding range.

The zero setting is when working in a subsequent 0 ° scaling amplifier 4.

other more accurate ranges than After the required range

according to the program, from the control device 12, the sensor is disconnected from the input of the channel selection device 2 and the measurement in the computing device 11 of the value of the drift velocity of the measurement channel. The code of the drift value for this range is recorded in the RAM 13.

Then, the displacement sensor is again connected to the input of the channel selection device 2. The choice of numbers to be connected to it will affect the measurement accuracy, since the measurement is carried out in two stages, in the presence and absence of a signal from sensor 1, as follows.

A search is made for a code (zero setting) at the input of the zero setting unit 9 in the coarse range and this code is memorized (if it does not correspond to the zero signal). Measurement of the drift of the measuring channel is made already on this particular sensor, therefore the sensors are carried out in the nominal range when a voltage is set, the program entered by the operator with the key is zero, at the output of unit 9 of set 19 through block 18 I / O, kinul (in order to eliminate the error in the Z setting unit, a register of the electronic installation zero for the sensor is selected from the register register block 10, and the drift is mastered at the second input). The code corresponding to the zero point of this range is calculated. It is remembered in RAM 13 as a pure

Schenie (set zero)

g „with„ -а ,,

where NT „is the zero point code of the nth sensor; eg

С „is the displacement of the rt-oro sensor;

di is the drift of the measurement channel of this range.

When measuring the channel drift (the channel does not have separation capacitors) according to a special program from the control device 12 - 55, a switch .10 register is disconnected using the device - and 2 sensor channel selections from the input of the channel amplifier 4 are the corresponding voltage. As a result, the output of the ADC 5 when measuring the signal from the l-th sensor, we have

., WITH",

where MU, MJ: -measurement oe and the actual values of the signals from the p-th sensor (in the code);

С „- sensor offset code. In the same way as described above, a signal is measured from any sensor. The value of the channel drift

la, the introduction of zero offset to the second input of the scaling amplifier 4.

The channel drift values for each range are different. Therefore, after the electronic installation of the zero of the fifth sensor according to the program from the control and memory device 12, the required measuring range of the spreading amplifier 4 is switched on as follows. With the coarse (higher) range on which the zero setting was made, the signal from the sensor is measured with the offset register entered from the unit 10 (zero setting voltages) to the second input of the amplifier 4.

The indicated signal in the code from the output of the ADC 5 enters the computing device 11 via the information bar, where, according to commands from the control device 12, the measured code from the output of the ADC 5 is compared with the values of the signals in. each

range (± 2000, ± 200, ± 20 microns). If the measured value L / is less than the value of the M code of one of the ranges (the value of / V is stored in the memory of the control unit 12 and the microprogram memory), but greater than the code value of the next smaller range, then the computing unit 11 selects -th range. The control device 12 through the register unit 10 generates a command to activate the corresponding range.

power amplifier 4 is the corresponding voltage. As a result, the output of the ADC 5 when measuring the signal from the l-th sensor, we have

., WITH",

where MU, MJ: -measurement oe and the actual values of the signals from the p-th sensor (in the code);

С „- sensor offset code. In the same way as described above, a signal is measured from any sensor. The value of the channel drift

measured immediately after each measurement of the signal from sensor 1 by disconnecting the sensor from the input on command from device 2 of the channel selector of control device 12. The code of the drift value is entered in the RAM 13 for further calculations. The need to measure the drift immediately after measuring the signal from the sensor is due to the fact that the amount of channel drift is slow. The back programs of the device and information are received by external devices, such as a personal computer, computer, through the interface 17.

Offline operation of the device is necessary to control the quality of the production of products with the participation of the operator. According to the results of the control, according to information from the screen of the indicator, the operator ensures by pecting the time and dynamically measuring the equipment and tools when

No signal from the sensor is smaller, the smaller the difference in time between the measurement of the signal and the drift.

Thus, in the computing device, the operation of finding

M Mlg - Sp - 9

20

50

where 5t is the amount of drift at some point in time (during the measurement of the signal).

From the output of the ADC 5, the information in the nth digit code of the information bus enters the microprocessor part of the system, designed to control the operating modes of the analog measuring part of the system using a block of 10 mode registers; reading measurement data from the output of the ADC 5 to the subsequent processing and storing of measurement results in RAM 13; outputting measurement and statistical data via the interface 15 to the indicator 16 (display); performing measurement and statistical processing of results using a computing device 11 controlled by a rigid program from control device 12 and firmware memory, and issuing data through input / output device 18 to print unit 21, alarm unit 20. and then to external memory (storage device); the operation of the device in an automated system through the communication device 17.

Information processing is carried out as follows.

After installing a controlled item on a mechanical basic device (MBU), which is not part of the proposed device, a signal from the MBU is sent from it through the input-output unit 18, which signals the possibility of measurements.

The proposed system can work offline when all operations

35

40

45

With post.pleniem signal from MBU to block

Input-output 18, according to the program stored in the control unit 12, the mode registers of the unit 10 are programmed to perform the following operations: electronic zero setting of each sensor enabling or determining the switching sequence of sensors with different numbers, automatic searching and switching on the required measurement range, measurement of channel drift for each included range.

Pre using the keyboard

19, on the front panel of the instrument, the initial data are set: reference values of the tolerances on the product, numbers and order of sensor connection, the number of gradations into which the reference tolerance is divided by statistical analysis, etc.

In addition, in the autonomous mode of operation of the proposed device, depending on the automatic or manual sub-modes of operation (selection by means of the keyboard 19), on the screen of the indicator 16, the sets of programs of operation of the device are highlighted. In this case, an operator-device dialogue is provided in the manual sub-mode, i.e., the operator is actively accommodated in the process of selecting and changing (from a set of) programs. In the automatic work sub-mode, only a specific set of programs set by the operator in advance is performed.

Thus, after activating the part of the program defining the zero setting, drift correction, Range setting, selection or sequential connection and statistical analysis, the result to the measuring path of the measurement device is performed using the sensors, the measurement and statistical analysis program begins to function. At that, the information on the absolute value of the size deviation in the code from the output of the ADC 5

tours. The results of measurement and analysis with jj on the data bus with each sensor are displayed on the indicator 16. As it enters the RAM 13. In the computational manual and automatic device 11 are possible to compare the pressures. Lree automatically prune these deviations from the established reference

grams recorded in the control device 12 (hard, constant), or in RAM 13, externally inputted from an external key, the rear programs of the device and information are received by external devices, such as a personal computer, computer, through the interface unit 17.

Offline operation of the device is necessary to control the quality of the production of products with the participation of the operator. According to the results of the control, according to information from the screen of the indicator, the operator provides for the re-adjustment of the equipment and tool when

five

0

0

five

five

0

five

release of controlled items.

An automatic so-called sub-work mode is required for flexible automatic production of products in workshop conditions, when the link between the machine, the tool and the control post (device) with a computer is closed without the operator's participation.

 In the following, an autonomous system operation is considered.

With post.pleniem signal from MBU to block

Input-output 18, according to the program stored in the control unit 12, the mode registers of the unit 10 are programmed to perform the following operations: electronic zero setting of each sensor enabling or determining the switching sequence of sensors with different numbers, automatic searching and switching on the required measurement range, measurement of channel drift for each included range.

Pre using the keyboard

19, on the front panel of the device, the initial data are set: reference values of the tolerances on the product, numbers and order of sensor connection, the number of gradations into which the reference is divided, the tolerance for statistical analysis, etc.

In addition, in the autonomous mode of operation of the proposed device, depending on the automatic or manual sub-modes of operation (selection by means of the keyboard 19), on the screen of the indicator 16, the sets of programs of operation of the device are highlighted. In this case, an operator-device dialogue is provided in the manual sub-mode, i.e., the operator is actively accommodated in the process of selecting and changing (from a set of) programs. In the automatic work sub-mode, only a specific set of programs set by the operator in advance is performed.

Thus, after activating the part of the program that determines the zero setting, drift correction, Range setting, selection or sequential connection to the measuring path of the sensor device, the measurement and statistical analysis program begins to function. At that, the information on the absolute value of the size deviation in the code from the output of the ADC 5

values for each sensor, also stored in RAM 13 and previously entered by keyboard 19. In the event that the tolerance value exceeds the reference values, on the screen of the indicator 16, the entry Reject appears and the light signaling of rejects is turned on, and through the input-output device 18 there is a sound signaling using the signaling unit 20.

If the measured tolerance values for the various sensors are within the allowable (specified) limits, then their absolute values are displayed on the display of the indicator 16 for each of the addresses (sensors), entered into the RAM 13, through the device 10

embedded in the control and memory device 12, for one reason or another, does not suit the consumer. In this case, from the external keyboard of the input-output unit 18, the new program is entered into the RAM 13 through the set and the further operation of the computing device 11 is carried out on the basis of this program. A new program with its repeated use through an I / O device 18 is recorded on an external memory (stored), made, for example, on floppy magnetic disks.

Thus, the system.ma ensures the extension of the functionality

in I / O 18, they are fixed on the device's J5 due to the possibility of the connecting device 21 when implementing the program "Image of measurement results.

In addition, both in manual and automatic sub-modes of the device operation at

neither to the sensor system, nor to provide statistical processing of the measurement results, i.e., the ability to control the quality of production by selectively controlling the products; automation

implementation of the statistical measurement and statistical processing subroutine measurement results for all sensors - by automatically switching modes, selecting measurement ranges and setting zero, pairing with a personal computer or computer and creating a closed 25

Cams from RAM 13 are fed to computing device 11, where according to the program specified by control device 12, algebraic addition of deviations from two random sensors, calculation of arithmetic average and variance of variances (for a batch to 99 deviations), calculation of the deviation range (for a batch to 99 deviations, sorting of deviations (assignment of the measured deviation to the on-own interval), counting the deviations in each interval, are histograms of the distribution of the calculated values. At the same time, the results of statistical processing when the pre-program is activated, the statistical processing is output via the information bus through and to external systems (if necessary).

Clocking of all devices of the digital processing system during the implementation of data recording programs, performing calculations

35

go automatic cycle gap; increasing the speed of processing information from a single sensor by eliminating calibration cycles and setting zero ADC.

Claims (1)

Invention Formula A parameter monitoring system comprising two inductive parameter sensors connected by inputs to the first output of a sinusoidal oscillation generator, an analog-to-digital converter and an indicator, characterized in that, in order to expand the functionality due to the multi-channel measurement and statistical analysis of the measurement results, two synchronous detectors, the scale of the output of results is carried out by the gene-40 doping amplifier, synchronization unit, The clock controller is 14 clock pulses. a zero setting block, a block of mode registers; an automatic mode; a device; a computing device; a device is connected to a computer or a personal computer control and microprogram memory, an onherater. At the same time, data is entered into the RAM 13 memory, the generator of the device from the computer memory occurs contactless pulses, two interface blocks, the operator's fate, the measurement results of the input / output block, the junction, the signal block from the RAM 13 of the proposed device The communication device 17 is fed into the computer RAM for further processing and accumulation. This mode, as noted above, is used for flexible automatic inputs to the outputs of inductive sensor productions without human parameters, and the output to information- (CNC machines, robotics). The input of the first synchronous detector is an additional feature of a predator connected to control entrance from device is the over-control input mode of the second synchronous programming. This mode is important in tomdetector and with the first output of the block of the sync case, when the transition to release 55 occurs, and with the output from the first information product, equipping the site with machines having a different profile, and generally if the program is hard lization, a printing unit, (L-2) inductive parameter sensors (and is the number of measured parameters), and a channel selection device connected by an information group the scaling amplifier associated with the second input with the output of the installation unit, and the output with embedded in the control and memory device 12, for one reason or another, does not suit the consumer. In this case, from the external keyboard of the input-output unit 18, the new program is entered into the RAM 13 through the set and the further operation of the computing device 11 is carried out on the basis of this program. A new program with its repeated use through an I / O device 18 is recorded on an external memory (stored), made, for example, on floppy magnetic disks. Thus, the system.ma ensures the extension of the functionality devices due to the possibility of connecting 20 measurement and statistical processing due to automatic mode switching, selection of measurement ranges and zero setting, interface with a personal computer or computer and creation of a closed 25 on go automatic cycle gap; increasing the speed of processing information from a single sensor by eliminating calibration cycles and setting zero ADC. Invention Formula A parameter monitoring system comprising two inductive parameter sensors connected by inputs to the first output of a sinusoidal oscillation generator, an analog-to-digital converter and an indicator, characterized in that, in order to expand the functionality due to the multi-channel measurement and statistical analysis of the measurement results, two synchronous detectors, scales, computing device, control device and microprogram memory, on-operative memory, clock generator pulses, two interface blocks, an input / output unit, a junction, a block of signal inputs to the outputs of the inductive parameter sensors, and an output to the information input of the first synchronous detection, a print unit, (L-2) inductive sensors of parameters (and is the number of measured parameters) and a channel selection device connected by a group of information  output, with the first information the scaling amplifier associated with the second input with the output of the installation unit, and the output with the first information input of the analog-digital converter connected by the second information input to the output of the second synchronous detector, and the control input to the second output of the synchronization unit connected by the first information input to the information input of the second synchronous detector and the second output of the sinusoidal oscillation generator, and the second information input input - with the output of the clock pulse generator and with the clock inputs of the mode register block, the control unit and the microprogram memory, the block water - output, printing block, operational zapomi10 of the first I / O group of the first information input-outputs of the I / O unit connected by the group of first information inputs with the keyboard output, the second group of information inputs-outputs with the I / O system external information inputs - with the input "External system keyboard, the third information input - with the input" The part is installed system, the first output - with the output "End of the system, the second output - with the input of the alarm unit, and group retih outputs - to the inputs block the first print interface unit — 15, the output group of the first investment, the second interface unit and the computing device connected by a group of inputs and outputs via an information bus to the output of the analog-digital converter are connected to the group of information inputs of the indicator, the group of outputs of the mode register block is connected to the inputs “Mode of the scaling amplifier, zero setting unit and channel selection device, groups of the mode register block, to the group of the information the outputs of the device of the device inputs and outputs of the device of the microcommand memory and memory are connected to the group of information inputs of the computing device, the first output of the generator of sinusoidal oscillations is connected to the inputs n-2 of the inductive sensors of the control and microprogram memory, to the group of information inputs and outputs of the operative memory devices, to the group of first information inputs / outputs the second mate, to the information group 25 meters 0 of the first I / O group of the first information input-outputs of the I / O unit connected by the group of first information inputs with the keyboard output, the second group of information inputs-outputs with the I / O system external information inputs - with the input "External system keyboard, the third information input - with the input" The part is installed system, the first output - with the output "End of the system, the second output - with the input of the alarm unit, and group retih outputs - to the inputs block 5, the output group of the first interface block is connected to the indicator input group, the output group of the mode register block is connected to the inputs of the “Scaling amplifier mode, zero setting unit and channel selection device grouped with the syntax of the syn 25 meters FIG. 2 K ish device Editor P. Gereshi Order 1842/45 VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35. Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Compiled by N. Gorbunova Tehred I. VeresKorrektor E. Roshko Circulation 864 Subscription