SU737921A1 - Device for measuring throw-over time of switching contacts of switching apparatus - Google Patents

Description

(54) DEVICE FOR MEASURING THE TRANSFER TIME OF SWITCHING CONTACT COMMUNICATIONS -. DEVICES The invention relates to those 4 points and can be used by the BfieMeHH switching the switching contact of switching devices for measuring and switching when performing control signals when performing control lines during the test and out of control signals when performing control signals during the test and outgoing circuits when performing control signals at switching points and switching circuits during switching and switching. Devices are known for measuring the switching time of a switching contact of switching products, for example, single-pole microswitches with three and four terminals per pole 1. These known devices allow you to measure the switching time of switching contacts without taking into account the time of their failure to open and close. The known method of measuring the time parameters of switching products, where the measurement of the response time is carried out from the moment of applying (removing) voltage to the winding of the test product before starting a reliable contact, i.e. without taking into account the bounce time 2. The closest to the technical essence of the present invention is a device for measuring the transfer time of a switching contact of switching products, for example microswitches and electromagnet relays containing a DC source connected to the circuit of disconnecting and closing switching contacts Model, pulse counter, the input of which is connected to the output of the logical element I, and one of the inputs of which is connected to the output of the generator of counting pulses 3. Indicated This known device does not allow the measurement of the time of a forward and reverse transfer of a switching contact without taking into account the time of contact bounce. The purpose of the present invention is to automate the measurement of the transfer time of switching KoHWkTa switching products without taking into account the time of their bounce during opening and closing. This goal is achieved by the fact that the device for measuring the switching-over time of the switching, contact of the switching products, contains a source of direct current connected to the terminals to which the contacts of the switching product are connected, the pulse counter whose input is connected to the output of the logic terminal I, one of the inputs of which is connected

the output of the generator of the counting pulses, and the installation circuit, introduced two load resistors, two logic elements 2I-2ILI-NOT, two log elements 2I-NOT and two triggers, with one load resistor connected in series with a DC source to the terminal to connect the disconnecting contact of the controlled switching product, another load resistor is connected in series with a DC source to the terminal dp of connecting the closing contact of the controlled switching product, to the same cells The pins of HBI OD1SH from the inputs of each of the logic elements 2I-NOT, the outputs of which are connected to separate inputs of one of the flip-flops, and one of the inputs of each logic element 2I-2ILI-NO, to the other inputs of which are connected the outputs of this trigger, and the output of one of the logic elements 2I-2ILI-NOT connected to the input of the zero setting of the pulse counter and to another input of the logic element I, the third input of which is connected to the output of another trigger .. The ONE input of which is connected to the output of the other logical element 2I-2ISH1-HE, and th input - to the output setting circuit. FIG. 1 shows a diagram of the described device; in fig. 2 - time diagrams of voltages on the circuit elements. The device for measuring the jogging time contains a source of direct current 1 connected to the contact circuits of the switching product, for example, a microswitch 2, a generator of 3 counting pulses, the output of which is connected to one of the inputs of the logic element 4, the output of which is connected to a counter of 5 pulses , load resistor 6 included in the circuit of disconnecting contacts of microswitch 2 and DC source 1, load resistor 7 included in the circuit of closing contacts of microswitch 2 and source of constant about current I, logic elements 2NE 8.9, logic elements 2I-2YLI-NE 10, 11, triggers 12, 13 and installation diagram 14 At the same time, the fixed contacts of the microswitch 2 connect OD1Sh from the inputs of the logic elements 2I-NE 8.9, the outputs of which are connected to the separate inputs of the trigger 12, and one of the inputs of the logic elements 2I-2ILI-NOT 10, 11, to the other inputs of which the corresponding outputs of the trigger 12 are connected, the logic input -. element 2I-2ILI-NOT 11 is connected to the input of the zero setting of the counter 5 pulses and to the second input of the AND 4 logical element, the third input of which is connected to the output of the direct trigger code 13, forming

the signal to prohibit counting by first closing the closing contacts, one input of the trigger 13 is connected to the output of the logic element 2И-2ИЛИ-НЕ 10, the output of the setting circuit 14 is connected to another input t of the trigger 13, and the inputs of the logic elements 2И-НЕ 8, 9

In the initial state, the switching KOH ;;

cycle 2 is closed with a fixed contact in the direction of a, while the logical resistor 1 is assigned to the load resistor 6 and the logical O signal is loaded to the load resistor 7. These signals are fed to the corresponding inputs of the logic elements 2I-HE 8.9, 2I-2IL - NOT 10,11.

When applying to the input of the installation diagram 14

signal logic 1. one of the logical

Claims (3)

elements 2I-NOT (in this case 8) generates a logical signal O on the output, while a trigger 12, the set input of which is connected to the output of the logic element 2INE 8, is set to the state corresponding to the set signal. In conjunction with this, the trigger 13 is set to such a state that the logical element 1 is fed to the input of the logic element I 4 from the trigger 13. The direct and inverse two signals taken from the outputs of the trigger 12 are fed to the inputs of the terminal 2I-2IL-HB 10 and 11, and in this case, the logical 1 signal is applied to such inputs of these logic elements so as to set up; trigger input 13 is connected to the load 7, and the zero input input of the counter 5 has been connected to T load 6, this counter is 5 will be installed immediately It will remain in this state until the switching contact with the stationary contact opens in the direction a. When the switch contact is thrown away during vibration when it is disconnected with the stationary contact of direction 2 to the input of element 2И-2ИЛИ-НЕ 11 pulse arrives, and logical 1 corresponds to the closed state of the contacts and setting counter 5 to the zero state, and logical O corresponds to the open state of contacts and, accordingly, the resolution for the counter to memorize the number of Twa pulses received by its input. The alternating occurrence at the load of 6 levels of logical T and O (diagram Ue) causes the appearance at the output of logic element 2I-2ILI-NOT 11 of the signal Uj 1 for which the logical O corresponds to the setting of counter 5 to zero, la logical 1 - the process of counting pulses. from the moment of the last disconnection of the switching contact with the fixed contact of direction a, counting pulses appear at the output of the logic element I 4, the arrival of which on. the input of the counter 5 is terminated when the logical element AND 4 segeala of the logical O.c output of the trigger 13 arrives at the second input (Ujj diagram of Fig. 2) The trigger 13 is controlled by a signal from the output of the logical element 2I-2OR-NE 10 (UIQ diagram), appearance logical O at the output of the flip-flop 13 is caused by the appearance of the logic 1, at the load 7, when the switching contact of the microswitch 2 is first closed with the fixed contact of the line b (Fig. 117). Thus, in the process of switching the switching contact of the microswitch 2, the output U4 of the logic element 4 appears at the input of the counter 5. As a result, the counter 5 remembers a part of this signal corresponding to the time interval from the last opening of the switching contact to the fixed direction contact and before its first closure with the t-moving contact of direction, i.e. the transfer time tn of the switching contact without taking into account the time it vibrates when it is opened and closed. Similarly, the device operates when measuring the time of the reverse transfer of the switching contact of the microswitch 2, while the trigger 12 is set to such a position that the elements coming from it to the inputs of the logic elements 2I-2OR OR 10, 11, these elements are set to this state that the input of the zero setting of the counter 5 is connected to the load 7, and the input of the trigger 13 is connected to the load 6. The installation diagram 14 ensures the device returns to its initial state. The use of the invention makes it possible to automate the process of measuring the time of the forward and reverse transfer of the switching contacts of the switching products without taking into account their bounce time, thereby increasing the productivity of labor during special studies at the stage of manufacturing and operating the switching products. The invention The device for measuring the switching time of switching contacts is switching1 .., -, / /;: .... 6th device contains, its constant-current power source connected to the terminals to which the contacts of the controlled switchboard device are connected, pulse counter The input of which is connected to the output of the logical element, And, to one of the inputs of which is connected the output of the counting generator Ipulso and yctaiiOBKH, which is different from the fact that, in order to automate the process of measuring the time of forward and reverse looping sa: switching contacts of switching devices, without regard to the time of their bounce during opening and closing, two load resistors were introduced into Hei-o, two logical elements 2I-2ILI-NOT, two logical elements 2I-NOT and two triggers with separate inputs, In this case, one load resistor is connected in series with a direct current drain to the terminal for connecting the disconnecting contact of the monitored switching device, the other load resistor is connected in series with the direct current source to connect neither the closing contact of the controlled switching device, one of the inputs of each of the logic elements 2И-НЕ, whose outputs are connected to the separate inputs of one of the flip-flops, and one of the inputs of each logic element 2И-, to the other inputs of which are connected to the same terminals are connected to the same terminals of this trigger, and the output of one of the logic elements 2I-2IL- is NOT connected to the input of the zero setting of the pulse counter and to the other input of the AND logic element, the output of the other input is connected to the third input of the logic element AND trigger od1t input coupled to an output of another logic element 2I-2or-NO, and the other input - with the output setting circuit and outputs logsh1eskIh 2I-NO elements. -. . Sources of information taken into account during the examination 1. GOST B 21268-75 Microswitches. General technical conditions. 2. USSR Author's Certificate N ° 210945, d, G 05 V. 23/02, 06,01.67. 3. Relay Time Meter 33. Technical description and operating instructions. M., Ministry of Instrumentation, 1973 (prototype). 9 but h on Esh IL