SU890419A2 - Device for monitoring machine operating modes - Google Patents

Description

The invention relates to automated means of controlling the loads of machines for various purposes and can be used, for example, to determine the duration of the operation of a machine with given levels of load quantization, i.e. obtaining a histogram of 1 machine load under operating conditions. According to the main author. St. N 765839, a device for monitoring the operation of a machine is known, which contains a current sensor and comparators, the number of which is equal to the number of quantization levels of the machine loads, the direct inputs of the comparators are connected to the outputs of the reference voltage source, the outputs of the comparators, starting from the third, are connected to the first inputs of the Element Element I- NOT, corresponding to the previous levels of quantum loads of the machine, a source of stabilized current, the output of which is connected to the inputs of keys, the outputs of which are connected to the input of the corresponding recorder, the outputs COM is connected to control inputs of the corresponding keys, output block, voltage sensor, additional key, filter, threshold element, NOT elements, voltage sensor outputs are connected to the input and reference voltage source and to one of the additional key inputs whose other input is connected to the current sensor, and the output is through a filter with inverting inputs of the comparators and to the input of the output unit, the output of the first comparator is connected to the control input of the first key via the threshold element and to the second input The NAND corresponding to the second level of quantizing the machine loads, the outputs of the comparators, starting from the second to the last but one, are NOT connected to the second inputs of the NAND elements through the corresponding elements, the output of the last comparator is connected to the control key of the last key, is connected to the input of a constant current source fl J. The disadvantage of this device is the inability to accurately set to zero and reset the readings of mercury integrators, which leads to eniyu measurement accuracy and reliability of the device. The purpose of the invention is to improve the measurement accuracy and reliability of the device by ensuring accurate zero setting and resetting the readings of mercury integrators. The goal is achieved by the fact that a pulse shaper is entered into a device for controlling machine operation modes and, according to the number of quantization levels of machine loads, switches, voltage regulators and keys are switch inputs connected to the outputs of the pulse shaper, whose input is connected to the input of a voltage sensor, outputs of keys connected to recorder inputs. The drawing shows a block diagram of a device in which four levels of quantization of machine loads are received. The device contains sensor track 1 whose output is connected via bridge key 2 and filter 3 to output block t and inverting inputs of comparators 5, Sj, Sg, and 5. One output of voltage sensor 6 is connected to control input of bridge key 2, and the other voltage 7 is connected to the input of the source. The outputs of the source of reference voltage 7 are connected respectively to the input of current source 8 and to the direct inputs of the comparators 5f 5. The output of the constant-current source 8 is connected to the inputs of keys 9, 92 9z and 94- Output of the second comparator SJL is connected via e-mail. NOT 11, j with the second input of the element AND-NOT Yud., The output of which is connected to the input of the second key 9. The output of the comparator 5 is connected to the first input of the element AND-HE Yu. the output of which is connected to the input of the third key 9 The output of the fourth comparator 5 is connected to the first input of the NANDS element and to the input of the fourth key. Cha 94- The outputs of the keys 9, 92 .. 9 and 9 are connected to the corresponding recorders 12, 12 ,, 12 and 12. Puller Former 13 is connected via switches Ti, 1 ,, 1.3 and 14 to the inputs of voltage regulators 15, 152, Sl The voltage regulator inputs 15, 15i, 15 and (-a -; 15d through the keys 16, 1b2, 1b and tori 2., are connected to the recorders 12a and 12. The device also contains (.. 1 v. Diode 17 and resistor 18. The operation of the device is as follows: When the engine of the controlled machine is turned on, the signal from current sensor 1 is supplied via bridge switch 2, controlled by voltage sensor 6 and filter 3 to the inverting inputs of the Comparators 5 2. 4 output block 4 for transmitting to the telemechanics system. The current value of this signal is strictly proportional to the load of the machine (taking into account the phase shift between voltage and current). Simultaneously to the direct inputs of the Comparators 5, Bd , 5 and 5, signals are received from the corresponding outputs of the source of the reference voltages 7. The values of the reference voltages correspond to the specified quantization levels of the controlled load of the machine. As long as the voltage at the direct inputs of the comparators exceeds the voltage at their inverting inputs, the signals at the outputs of the comparators are positive. In this case, the keys 9 "9 / are in the closed state. The current from the source (stabilized) current 8 is applied to one or another recorder only when a corresponding key of the negative signal appears at the control input. With the passage of a stabilized current through the recorders, which can be used, for example, mercury electrochemical integrators, the latter show the duration of the operation of the machine with loads that match the specified quantization levels. As soon as the voltage at the inverting input of the first comparator 5 exceeds the voltage at its direct input, a negative signal appears at the output. However, this does not pass through the diode. The positive signal from the second comparator 52. the passage through the element NOT lie. Is inverted and through the resistor 18 is supplied to the control input of the first key by opening it and passing current from the source of the stabilized current 8 to the first integrator 12. When the voltage on the inverting input of the second comparator Sj is exceeded. the voltage at its direct input, at the output a negative signal appears, which the passage through the element NOT 112 inverts and closes the key 9 / f. stopping the supply of current to the first IZ-j recorder. At the same time, the same signal arrives at the second input of the AND-HE element lOjj, the first input of which receives a positive signal from the output of the comparator 5 3- Since both of the inputs of the AND-HE element 10 receive positive signals; then a negative signal appears at its output which opens the 9l key. and passes the current through the recorder 12.1. When the voltage at the inverting input of the third comparator 5c is exceeded, a negative signal appears at the output at the output, which is fed to the first input of the AND – NO element, thereby closing the key 92 stopping the current flow through the recorder 2 At the same time, this signal, the passage through the element NOT of the TC is inverted and arrives at the second input of the element AND-NE 10-, the first input of which receives a positive signal from the output of the comparator 5L. Therefore, the output of the element AND-NOT 10 appears negative signal open ayuschy key 9a. through which the current to the third recorder 12 begins to flow. When the voltage on the inverting input of the fourth comparator 5L voltage on its direct input is exceeded, a negative signal appears at the output that simultaneously goes to the first input of the AND-NOT element 10, thereby interrupting the supply of current to the third recorder 12z, and the control input of the switch Al, which at the same time opens with and supplies current to the fourth recorder 12l. At any time, current can flow through only one of the recorders. In this way, the device records the operating time of the machine with the specified load levels and generates an output signal proportional to the load of the machine, taking into account the phase shift between voltage and current. To the output unit k, an additional analyzing equipment or a computer is connected, which provides 8 94 accurate information about the mode. machine operation and increases the reliability of the entire device. To set to zero or reset the display of any recorder 12, 122, 3 or 12, it is necessary to close the corresponding key 16., 162, 163 164 and put the corresponding switch 1, J-, I. or Nl in one of two positions, depending on the requirement or 1Bd depending on my direction of movement of the electrolyte gap in the recorder. The pulse current begins to flow from the pulse driver 13 through the corresponding voltage stabilizer 15v, 15, 15-2 or 15 to the corresponding recorder 12, 12, 12 or 12 j. This achieves a rapid movement of the electrolyte gap in the mercury integrator in the desired direction. The use of the proposed device provides an increase in the efficiency of operation and quality of maintenance of machines in various areas of the national economy, and in particular makes it possible to clarify the consumption rates of spare parts and lubricants, overhaul periods, periods of overhaul, reliability indicators, etc. In addition, the information obtained with the help of this device makes it possible to improve the design of machines and the methods of their strength calculation. Claims of the invention A device for controlling the operating modes of machines according to the author. St. No. 765839, about aphids. So that, in order to improve the measurement accuracy and reliability of the device, a pulse driver is introduced into it and, according to the number of quantization levels of machine loads, serially connected switches, voltage regulators and switches, the switch inputs are connected to the pulse driver outputs, the input of which is connected to the sensor input voltages; key outputs are connected to recorder inputs. Sources of information taken into account in the examination 1. USSR author's certificate No. 765839, class, G 07 S / U, 1978 (prototype).

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Claims (1)

Claim A device for monitoring the modes of 40 machines by ed. St. No. 765839, which is characterized in that, in order to increase the accuracy of measurements and the reliability of the device, a pulse shaper is introduced into it and 45 switches, voltage stabilizers and switches are connected in series to the number of machine load quantization levels, the switch inputs are connected to the outputs of the ₅₀ pulse shaper whose input is connected to the input of the voltage sensor, the outputs of the keys are connected to the inputs of the recorders.