SU1686334A1 - Device for determination of technical condition of cyclical operation systems - Google Patents

Abstract

The invention relates to the technical diagnostics of cyclic mechanisms, in particular internal combustion engines, with the aim of increasing the efficiency of the device in operation due to a significant reduction in hardware costs for implementation, as well as by increasing the reliability of obtaining statistical information, performance, equipment utilization rate and greater functional flexibility A multifunction shaper of 9 pulses, a universal selector of 7 intervals, MF are entered into the device. tchik drive statistical information, implemented via the synchronizer 10, the register 11 code unit 12 RAM memory and the adder 13, and the work pulse shaper 9 signals synchronized angular position sensor 2, and output of the selector 7 slots is divided into a control and counting. The proposed device provides high-performance collection of statistical information and diagnostics for complementary features, 2 s.p. f-ly, 3 ill. cl

Description

The invention relates to the technical diagnostics and can be used to determine the technical state of the mechanisms of cyclic action, in particular in the diagnostic systems of internal combustion engines.

The aim of the invention is to increase the efficiency of the device at work by increasing the productivity, reliability of the control, functionality and utilization of the equipment.

FIG. 1 shows the structural-functional diagram of the device; in fig. 2.- structural and functional diagram of the interval selector; in fig. 3 is a timing diagram of the formation of selection signals.

The device contains a sensor 1 parameter, sensor 2 angular position, filter 3, circuit 4, setpoint 5 cycles, address counter 6, interval selector 7, address register 8, pulse generator 9, synchronizer 10, code register 11, main memory unit 12 and adder 13.

The sensor 1 of the parameter is connected via the filter 3 to the information input of the pulse former 9, the first output of the angular position sensor 2 is connected to the synchronization input of the pulse former 9 and the first input of the AND 4 circuit, and the second output of the angular position sensor 2 is connected to the setpoint input 5 cycles, the first output which is connected with the second input of the circuit And 4. The loader 5 cycles is equipped with a start bus, the second output of the setting device 5 is connected to

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the reset inputs of the interval selector 7 and the address b counter, the counting input of the address counter 8 is connected to the second output of the interval selector 7, the counting input of which is connected to the output of the AND 4 circuit, and the first output of the selector to the blocking input of the pulse generator 9. The output of the driver 9 of the pulses is connected to the input of the synchronizer 10, the first and third outputs of which are connected respectively to the synchronization inputs of the register 11 of the code and the register 8 of the address, and the second output to the control input of the main memory unit 12. The information inputs of the address and code registers 8 and 11 are connected respectively to the outputs of the address 6 and the adder 13, and the outputs of the registers 8 and 11, respectively, to the address and information inputs of the RAM 12, the output of the latter connected to the adder's input, 13,

The interval selector 7 comprises a switch 14, a counter 15 intervals, a trigger 16, a one-shot 17, a counter 18 of codes, and the first and second elements OR 19 and 20.

The first input of the switch 14 and the information inputs of the counter of 15 intervals and the counter of 18 codes are installation, the counting input of the counter of 15 intervals and the second input of the switch. 14 are combined with the counting input of the selector 7 intervals, the first inputs of the elements OR 19 and 20 and the input of the record of the code counter 1B are combined with the reset input of the selector 7 intervals. The clock input of the trigger 16 is connected to the output of the counter 15 interval, the reset input of the trigger 16 is connected to the output of the element OR 20, the second input of which is connected with the output of the counter 18 codes. The output of the trigger 16 is connected to the third input of the switch 14, the counting input of the code counter 18 and through the one-shot 17 to the second input of the OR element 19. The first to second outputs of the switch are the first and second outputs of the interval selector 7.

The main functions are carried out in the form of three interacting structures. The combination of parameter sensor 1 and filter 3 is the channel of the process under study. The kanap of angular coordinates or phases of a periodic process (depending on the application of the device) consists of an angular position sensor 2, an AND 4 circuit, an interval selector 7, a 5 cycle setting unit and an address counter 6. A driver of 9 pulses, a synchronizer 10, a code register 11, a RAM block 12, an adder 13 and an address register 8 are included in the registration channel of diagnostic air gages.

The device works as follows.

In the workflow channel, an analog or digital pulse signal is generated that adequately reflects the process being studied. The channel of the angular coordinates produces absolute or interval (relative) values of the angular coordinates of the work process in a given angular interval. Diagnostic parameters registration channel

0 is triggered by a predetermined diagnostic sign and accumulates statistical information.

Before starting measurements in accordance with the statistical experiment program, the initial setting of the parameters of the interval selector 7, the master of 5 cycles is made, logical O is recorded at all addresses of the RAM block 12, the analysis function (diagnostic sign) of the workflow in the pulse shaper 9 is selected, Dunn The initial installation is carried out either manually by dialing the job codes or automatically from an external device, such as on a data bus from a computer or other control device.

From the output of the sensor 1 parameter, the signal passes through the filter 3 and enters the information input of the driver 9

0 pulses. The filter 3 limits the working frequency band within the prescribed limits, thereby eliminating false positives and improving the stability of the shaper 9 pulses. The angular position sensor 2 generates at the first output a sequence of rectangular pulses fC4 incrementally in accordance with the rotation of the mechanism shaft. The number of these pulses per one complete revolution r is chosen depending on the required angle resolution for a given statistical experiment. At the second output of the angular position sensor 2, one pulse signal of the reversal mark f0 is formed for one complete revolution of the shaft; its duration is equal to the duration of one pulse of the specified sequence fC4. The to signal is applied to the backplane input for 5 cycles and performs a cyclical synchronization of the operation of the device. From the first output of the sensor 2 of the angular position, the pulse sequence fc4 is fed to the first input of the circuit 4 and the synchronization input of the driver 9 of the pulses. In the setter

5 5 cycles, the code corresponding to the volume of the statistical sample is loaded by the initial installation, after which the potential output 1 is set at the first output of the setting unit 5 cycles, which is connected to the second input of the AND 4 circuit.

through the circuit AND 4 signals fC4 to the counting input of the selector 7 intervals. The f0 signal performs a count of analysis cycles in the unit for 5 cycles. At the second output of the setpoint generator 5 cycles, a revisive tag signal f0 is generated, which is fed to the reset inputs of the interval selector 7 and the address counter 6. The signals on the first and second outputs of the setter of 5 cycles are implemented until the number of pulses f0 arrives in it, COOT- corresponding to the code for the initial setting of the number of analysis cycles. The function of the interval selector 7 is that at its first output a gating digital signal g of selection r is formed in accordance with the initial installation code for the angle of rotation of the shaft. The signal arrives at the blocking input of the pulse former 9 and, for the duration of its operation, resolves the analysis of the workflow signal in the latter. Thus, during the entire working cycle, the most informative sections are selected by the angle of rotation of the shaft. From the second output of the selector 7 intervals, the pulses of increments of the angular position of the shaft fC4f arrive at the counting input of the address counter 6 during the whole cycle or only during the selection strobe t. As a result, the address codes 6 are generated at the output of the address 6 and corresponding to the angular position of the shaft relative to the pulse f0 or the moment of the formation of the selection signal t. This makes it possible to obtain and locate information at absolute or selective addresses. The choice of the sequence selection variant is determined by the initial setting and depends on the application of the device.

At the output of the pulse shaper 9 synchronously to the signals fC4 during the selection gate r, a pulsed digital signal fa is generated in accordance with a predetermined function of analyzing the signal of the working parameter. The choice of the method of forming fa is determined by specific criteria for diagnosing the mechanism, the type of sensor 1 parameter used, a further method for processing the information received, and other features of the application.

Diagnostic features are determined by the specific application of the device. At the time of arrival of the signal fa at the input of the synchronizer 10, signals are produced at the outputs of the latter in the following sequence. At the third output, a pulse signal is generated, on the front of which, via the synchronization input of the register 8 address and the last one, the address code N3, n is written from the output of the address counter B. This code is fed to the input of the address of block 12 of the memory, the cup is currently in a state of reading information at the specified address. After the sampling time of the data but the output of the RAM 12, an NK code is generated, which is fed to the input of the adder 4. The latter operates in the increment mode of the indicated Mk code by one. After the time required for the addition operation, the NK + i code appears at the output of the adder, which arrives at the information input of the register 11 of the code. At the next moment of time, from the first output of the synchronizer 10, a pulse signal is received at the synchronization input of the register 11 of the code, which writes the code Mk + 1 to the register 11 of the code, from the output of which this code is fed to the information input of the RAM 12. At the next time point, the second output of the synchronizer 10 generates a signal arriving at the control input (write-read) of the RAM memory unit 12, and puts the latter into the information recording mode. The length of the recording signal is chosen to be sufficient to record information reliably. After that, the control signal again goes into the information reading state. From this moment on, synchronizer 10 is again ready for sensing control action. Almost the speed of the elements of the recording channel of diagnostic parameters is high enough so that without gaps during one cycle (or during the operation of the gate t) to record information with a minimum difference in the angle of rotation of the shaft, i.e. with discrete counting signals fC4.

Thus, after analyzing the number of cycles of the experiment set in the unit 5 cycles and taking into account the fact that prior to the beginning of the measurements, logical O was recorded at all addresses of the RAM 12, D the last accumulated information about the number of occurrences of certain coordinates of the angular position of the shaft (i.e., to addresses of the address) of functionally defined diagnostic indications.

Dann's information provides a histogram of the distribution of a random input variable over the angle of rotation of the shaft of the cyclic action mechanism. Analyzing this histogram, make a conclusion about the state of the mechanism.

It should be noted that the specified mode of forming the selective address

Using the interval selector 7 and using this channel of registration of diagnostic parameters, block 12 of the optional memory can be used, invariant in address space to the sensitivity of the angular reading when turning the beam, In this case, different sensors of the angular position of the shaft can be used or significantly changed Ps4 without any changes in the device. At the same time, the hardware resources of the device are saved, which is especially important in the case of using the block 12 of the operative memory as part of the computer illustration of another external device. structures because it is necessary to solve the problem of optimal allocation of all information in memory blocks,

The selector 5 intervals works as follows.

Before the measurements are started, the initial setting of the operation modes of the switch 14, the 15 interval counter and the 18 code counter is done. To do this, the first E1 input of the switch is supplied with the logical two-digit installation code Must1, which specifies the four operating modes of the switch 14. Depending on the Nycr code, they can be in the selection mode or in the constant activity mode. In this case, the selection mode means that the selection signal g appears in the work cycle only in the adano-angular position SRI and counting pulses at the output of the switch fC4 1L are generated only for the duration of the selection signal t, Mode constant activity indicates that the selection signal g has a constant value logical one, and count pulses fc4 continuously extend throughout the entire cycle. We denote the selection mode arbitrarily as, the mode of constant activity 1. Then the correspondences between the Must code and the states of the signals of the g Fa1 are as follows (cw. Table),

The initial setup code Nycr2 is fed to the data input of the 15 interval reader and determines the interval values when generating the selection signals r in accordance with FIG. 3, where the selection signals of the reversal label f01 are conventionally combined (signals f01 are shown ccc pulses of duration Go).

2 „to

Nycr Ni + N2 + N 3 or - N2 - N3, depending on the method of submitting the Must2 code in parallel or in series, where NI, No., No. are the codes defining consecutive intervals by the angle of rotation of the shaft. NI specifies the initial interval from

the time of the appearance of the signal of the current mark G0 until the moment of the appearance of the selection signal g, N2 determines the interval 12-13 of the duration of the selection signal g; N3

determines the interval from the moment of termination of the selection signal t to the moment of the appearance of the next selection signal.

Lust3 is fed to the input of the data of the counter 18 and determines the number of signals for the selection of r, formed during one

working cycle (i.e. per shaft rotation).

Nycr1, Nycr2, Must3 codes are manually typed

using a special switch

or come from an external manager

devices, for example, via a computer data bus, depending on the application of the device.

The cycle of operation of the selector 7 intervals begins with the arrival at its input reset

signal fo1 at time t (see Fig. 3, impulse r0). This signal passes through the first element OR 19 to the entry of the counter 15 intervals and writes the NI code into it, acts on the record entry of the counter 18, writes the Must code into it, and the passage through the second element OR 20 to the reset input of the trigger 16, sets it to output logic O. During the time n-t2, the fC4 pulses subtract the NI code in counter 15

intervals. At time t2, at the output of the interval counter 15, a signal is generated that arrives at the clock input of the trigger 16 and sets at its output a logical one. In this case, the trigger 16 is

the front of this signal is triggered by the one-oscillator 17, from the output of which the short pulse signal passes through the first element OR 19 to the recording input of the counter 15 intervals, as a result of which

Na code is recorded. This happens before the 15 counts of the next signal arrive at the counting input of the counter, i.e. with a slight delay relative to the time point t.a. At time 1h in the counter

15 intervals the code N2 is completely subtracted and at its output a signal is produced that translates the trigger 16 of the state O, i.e. The selection signal r is formed over time. At time t.3 by

When the signal decays, the vibrator again generates a pulse signal, which is recorded into the counter 15 intervals of the code Mz on the same feedback circuit. On the decline of the signal t also operates the counter 18, its

the code is reduced by one and Must 1- becomes. At time s, in the 15 interval counter, code N3 is completely subtracted, as a result logical 1 is generated at the output of trigger 16, and a pulse again is formed in the odiovibrator, which in the counter 15 intervals records the N2 code. Further work happens as described. The formation of selection signals t at the output of the trigger 16 will continue until the code Nycr3 is completely subtracted in the counter 18.

The signals of the reversal label f0 and selection g are control (synchronizing) in the formation and loading of codes Nycr1, Nyci2, Nyci3 from an external device, for example, via a computer data bus.

The selected method of forming the selection signals by sequential counting of intervals, tz-ta, etc. Using the same counter, 16 intervals, on the one hand, allows minimizing the hardware for implementation, and on the other hand, it has sufficient flexibility in selecting the necessary selection parameters.

As a concrete example, we can consider the use of a selector of 7 intervals in the study and diagnosis of the process of fuel injection in diesel engines D100. In this case, a vibration sensor is installed on each nozzle (in this case, these 10 sensors are sensor 1 of the parameter). Their common signal from the output of the sensor 1 parameter will be perceived in the shaper 9 pulses only at the moments of the action of the selection signals T received from the selector 7 intervals. Ten signals T are aligned in the angle of rotation of the shaft at predetermined intervals of useful information. At the same time, vibration sensors can practically perceive shock effects at non-informative points of time for these measurements. But due to the use of the interval selector 7, extraneous influences will not affect the course of statistical measurements.

Additionally, the sensors can be decoupled by connecting them, for example, using an analog mixer, adder or switch (not shown in the device, since it does not directly relate to the essence of the invention).

At the same time, the device uses wide possibilities of the interval selector 7. In particular, useful statistical information is processed for all 10 channels at each run cycle (i.e. 10 measurements are made for 10 cylinders of diesel).

In this case, the time of collecting statistical information is significantly reduced, the procedure and measurement techniques are simplified, which increases the efficiency of the device. In addition, in the registration channel of diagnostic 5rag-.5meter, in particular about RAM 12 RAM, a large information volume is placed, which is tatche, depending on the rate of ipopozoanil

5 porsor / dovany and effective training (iie / iow.

Thus, in comparison with the known value, a higher efficiency is achieved due to the highly productive, high performance. reliable, multi-level diagnostics for a complex of signs.

Claims (2)

Invention Formula 5 1. A device for determining the technical condition of cyclic action mechanisms containing a parameter sensor, an angular position sensor with two outputs, a filter, an AND circuit with two inputs, cycles with one input, a start bus and two outputs, an address counter with a counting input and a reset input, an interval selector with two inputs and outputs and an address register with two inputs, the output of the parameter sensor is connected to the input of the filter, the first output of the angle position sensor is connected to the first input of the AND circuit, the second input to the input adatchika cycles, the first output of which is connected to the second input 0 of the AND circuit, the second output is connected to the reset input of the address counter, the counting input of which is connected to the second output of the interval selector, the output of the address counter is connected to the information input of the address register, The output of the AND circuit is connected to the counting input of the interval selector, and the cycle setter is equipped with a start bus, which, in order to increase efficiency in operation due to response of the manufacturer HOCIH, reliability of control, Functional capabilities and equipment utilization factor, device driver shaper pulses with three HF olaml, a synchronizer with three outputs, 5, a code register with two VHpamch, a block of operational memory asterists and an adder, with the information input of the pulse former connected filvyua output, inputs and sinhoonigatspi blokprov0 or ki; pulses - to the first output of the angular position sensor and the first output of the selector switch, cs, the reset input of the latter is connected to the output of the preset cycles, the output 5 1; From IGU 1 Ivztelp pulses are connected to the INPUT of the synchronizer, the first output of which is connected to the synchronization input of the col register, the second output - to the control hunting of 5 lo. And main memory, and the third output - to the synchronization input of the register addresses, the output of the latter is connected to the address input of the RAM, the output of which is connected through an adder to the information input of the code register, the output of the latter is connected to the information input of the RAM. 2. The device according to claim 1, that is, that the interval selector contains a switch with three inputs and two outputs, an interval counter with three inputs, a trigger with two inputs, a single vibrator, a code counter with the three inputs and the first and second elements OR, the first input of the switch and the information inputs of the interval counter and the code counter are respectively installation, the score 0 five the input of the interval counter and the second input of the switch are combined with the counting input of the interval selector, the first inputs of the first and second OR elements and the input of the code counter recording are aligned with the reset input of the interval selector, the trigger input of the trigger, the trigger reset input connected to the second output the OR element, the second input of which is connected with the output of the code counter, the output of the trigger is connected to the third input of the switch, the counting input of the code counter and through the one-vibrator with the second input of the first elec cient OR and the first and second switch outputs are first and second selector outputs intervals. fa Fie.2 Fe / eZ