RU198649U1 - PORTABLE DEVICE FOR TESTING THE OPERATION OF END SENSORS D-20 - Google Patents

Abstract

A device for testing the operability of the D-20 end sensors used in the electrical equipment of armored vehicles is proposed; it allows checking the sensors without dismantling them by regular crews of armored vehicles, which reduces the complexity of troubleshooting and repair processes. The purpose of the development of the proposed utility model is to increase the reliability of diagnostics of the D-20 sensors, the ability to check the sensors without dismantling them by regular crews of armored vehicles, and, as a consequence, to reduce the complexity of troubleshooting and repair processes. The principle of operation of the device is based on the use of a microcontroller of the ATtiny family, in a Dip-8 package. The microcircuit contains two LEDs, a control lamp for closing the "Check" button and a microcontroller. The microcircuit has eight contacts, one is connected to the charge and deep discharge controller, two are connected via an adapter (wiring kit) to the D-20 end sensor, two to the "Check" clock button, two are connected to LEDs, one contact in this circuit is not involved. The sensor test is performed in two stages by pressing the "Test" button. The microcontroller is loaded with firmware that controls this microcontroller. At the first stage, when the "Check" button is pressed under the control of the microprogram, the microcontroller turns on and checks for a short circuit between the second and fourth contacts of the ShRG electrical connector connected to the D-20, and the absence of a short circuit between the third and fifth contacts. At the second stage, the check is carried out similarly to the first, but with the button pressed (Fig. 3) of the D-20 sensor. In this case, the presence of a short circuit between the third and fifth contacts of the SHRG electrical connector and the absence of a short circuit between the second and fourth contacts are checked. The check is carried out by applying voltage to one of the contacts and registering this voltage on the other three contacts. Based on the test results, the microcontroller applies voltage to one of two LEDs: in case of a successful test - to green, in case of a failed test - to red. Achievement of the listed goals is achieved by the mobility of the device, which has small dimensions and weight, using standard switching electrical connectors that allow connecting to the connectors of the tested sensors without dismantling them. The main advantage of the proposed device is that it does not need power from the tank's on-board network, and the electrical circuit of the device allows the device to be used to diagnose other similar sensors and electrical system equipment.

Description

The utility model relates to technical devices for diagnostics of devices of the electrical equipment of armored vehicles and can be used to test the performance of the D-20 end contact sensors.

The electrical equipment of modern armored vehicles is a complex system designed to ensure the operability of numerous consumers: equipment of the armament complex, various instruments, special equipment, etc. One of the elements of electrical equipment of armored vehicles, namely the tank, are the D-20 contact end sensors. As the practice of operating armored vehicles shows, a great difficulty in the military repair of a tank is caused by questions of troubleshooting that arise in the circuits of electrical equipment. These difficulties are caused by various factors, such as the layout of the tank.

One of the requirements in the development of new models of modern armored equipment is to reduce its overall dimensions in order to reduce the likelihood of being hit by enemy fire. Therefore, the layout of the tank and objects created on their basis (specialized armored vehicles, heavy tractors) is characterized by a very dense arrangement of units, assemblies and other elements of various systems inside the vehicle. Due to this design feature, it is rather difficult to provide access to various components and assemblies, including the elements of electrical equipment for checking, repairing or replacing them.

In addition, checking the devices of the electrical equipment system assumes that the personnel servicing these devices have certain knowledge and skills in the field of electrical engineering, and this requires the involvement of additional specialists. In this regard, it became necessary to provide troops and repair plants with a device that would basically solve the above problems that arise when servicing complex electrical systems of armored vehicles.

To find faults in the electrical circuit of the D20 end sensors of the tank, general diagnostic devices are used, such as oscilloscopes, testers, control lamps are widely used, consisting of two probes connected to an electric lamp ["Tank T-72A. Technical description and operating instructions ". Book. 2 Part 2 - M: Military Publishing, 1989 p. 69].

Diagnostics of the D-20 end sensors with the help of the listed devices consists in the fact that the signal flow through the sensor circuit is checked in turn, first when the button is pressed and then released by closing the probes of the above devices to the corresponding contacts of the plug hermetic connector (SHRG) of the sensor ["Tank T- 72A. "Technical description and operating instructions". Book. 2 Part 2 - M .: Voenizdat, 1989 p. 24].

The disadvantage of diagnosing the operability of end sensors using the listed devices is the need to attract highly qualified specialists, which is not always possible in the field. Other disadvantages of such diagnostics are: difficulty in diagnostics of end sensors when short-term signals are applied to them; the duration of the troubleshooting process, which can adversely affect the time to bring the tank into combat readiness, especially in wartime; the need to dismantle the sensor for testing, since the D-20 end sensor is located in a hard-to-reach place and it is difficult to connect diagnostic devices to it.

The closest technical solution to the claimed utility model is a device for testing the electric starting system of a tank engine [see. copyright certificate RXJ No. 2143582 C1, publ. 12/27/1999]. The invention relates to technical diagnostic devices, in particular to electrical systems diagnostic devices. With the help of an electrical circuit, including ten identical stages, consisting of a diode, an LED, a relay and a resistor, the signal flow from the control connector SHZ of the PAS-15-1S device is monitored, which makes it possible to troubleshoot the circuit of the electric engine start system by monitoring the flow of output signals, including short-term ones, from the control connector SHZ of the PAS-15-1S device.

The specified device has a number of features similar to the proposed utility model, namely, it is portable, connected to the standard electrical connector of the tank and is used to diagnose the devices included in the electrical system of the tank. However, the disadvantage of this device is its dependence on the on-board network of the car, which excludes its use with batteries removed from the car. In addition, the device circuit is designed only for diagnostics of devices of the electric engine start system and does not allow using the device for diagnosing other elements of the electrical equipment system.

The purpose of the development is to create a device for testing the performance of D-20 end sensors used in the electrical equipment of armored vehicles, which allows checking the sensors without dismantling them by regular crews of armored vehicles, and as a result, reducing the complexity of troubleshooting and repair processes.

FIG. 1 shows the body and cover of the D-20 end sensor (the power button is not shown).

FIG. 2 shows the electrical diagram of the device for testing the performance of the D-20 end sensor.

FIG. 3 is a designation table for FIG. 2 (Table 1).

FIG. 4 - external view of the end sensor D-20 (light indicators are not shown).

This technical result is achieved by creating a mobile portable device with small dimensions and weight, and the use of standard switching electrical connectors will allow connection to the connectors of the end sensors being tested without dismantling them.

A mobile portable device is proposed, which consists of a body 1 and a cover 2 (power button not shown) (Fig. 1), made on a 3D printer, in accordance with a model developed for specific components. The cover 2 is fixed to the body with screws through the holes for fastening 3. The screws from above are filled with varnish for tightness and fixation. The groove between cover 2 and body 1 is filled with sealant. There are two compartments inside the body, one of which, compartment 4, is used to accommodate an autonomous power source (battery) connected to the electrical circuit located in compartment 5. On the cover 2 there are light indicators 6 (green, red, blue). The red and green indicator lights are connected to a microcontroller that provides control signals to the LEDs. The green LED signals the serviceability of the tested sensor; red - signals a sensor malfunction, the blue indicator is connected to the power button 8 (S1) and signals that the device is ready for operation. On the case 1, in addition to the power button 8, there is a test start button 7.

The device also includes a power supply (battery), wireless (external) charging with overcharge protection, wiring kit and electrical circuit of the device with an ATtiny microcontroller (for example, a microcontroller of the Atmel corporation ATtiny 13 https://static.chipdip.ru /lib/059/DOC000059583.pdf) with Dip-8 package.

An autonomous power source (battery) is connected to the charge / deep discharge control module U2. This module has six pins U2.pin1-U2.pin6, two of which (U2.pin1 and U2.pin2) connect to the B1 battery (Fig. 1), two (U2.pin6 and U2.pin5) to U1 wireless charging ( Fig. 1), two (U2.pin4 and U2.pin3) for the load (microcontroller and end sensor D-20).

The microcontroller U3 has eight pins U3.pin1-U3.pin8. One (U3.pin4) is connected to the U2 battery charge / deep discharge control module, two (U3.pin3, U3.pin2) are connected via an adapter (wiring kit) to the D-20 (U5) end sensor, two (U3.pin1, U3.pin8) to the test start button (S2). The second contact of the microcontroller for charge / deep discharge of the battery U2 is connected through the power button S1. Pins U3.pin5 and U3.pin6 are connected to LEDs D3 and D4 respectively. Contact U3.pin7 is not used in this circuit.

The electrical circuit of the device with a microcontroller of the ATTiny family allows reprogramming in order to use the device for diagnostics of similar elements of the electrical equipment system.

The D-20 end sensor is a device that has two pairs of contacts U5.pin2, U5.pin4 and U3.pin3, U3.pin5, connected to the U5 plug of the D-20 sensor. In the initial position, when the power button is not pressed (Fig. 4), contacts U5.pin2 and U5.pin4 are closed and an electrical signal passes through them. The second pair of pins, which has pins U5.pin3 and U5.pin5 on the U5 plug, is open. When the control device acts on the power button (Fig. 4), the first pair of contacts opens, and the second pair closes. In this case, the electrical circuit at the contacts U5.pin2 and U5.pin4 will be broken, and the signal will go through the pins U5.pin3 and U5.pin5 of the U5 connector. The pin U5.pin1 on the connector is not used in this circuit.

To check the operability of the end sensor, it is necessary to disconnect the cable plug from it and connect the device cable to the sensor connector. When the instrument is powered on, the blue indicator light on its front panel lights up, while the other two indicators are off. This indicates the serviceability of the device and its readiness for operation.

The end sensor test is performed in two steps by pressing the test start button (S2) 7 (FIG. 1). The performance of the microcontroller is provided by the computer program, which goes beyond the proposed technical solution.

Consider the operation of the electrical circuit of the device to test the performance of the D-20 sensor (Fig. 2).

At the first stage, the end sensor is checked with the power button depressed (Fig. 4) (the sensor is turned off). When the test start button (S2) 7 is pressed under the control of the firmware, the microcontroller turns on and checks for a short circuit between the second (U5.pin2) and fourth (U5.pin4) contacts of the SHRG electrical connector connected to the D-20 sensor, and the absence of a short circuit between the third ( U5.pin3) and fifth (U5.pin5) pins. The test is carried out by applying a voltage to the U5.pin2 pin and registering this voltage to U5.pin3, U5.pin4 and U5.pin5. In a working end sensor, a voltage will be registered on the U5.pin4 contact, and the voltage on U5.pin3 and U5.pin5 will be equal to zero.

If the test is positive, the microcontroller applies voltage to the green lamp of the D4 indicator light, if there is a malfunction in the sensor, the red D3 lamp lights up.

At the second stage, the turned on sensor is checked when the power button is pressed (Fig. 4). The check is carried out in the same way as in the first stage. In this case, the presence of a short circuit between the third (U5.pin3) and the fifth (U5.pin5) contacts of the SHRG electrical connector and the absence of a short circuit between the second (U5.pin2) and fourth (U5.pin4) contacts of the sensor is checked.

The proposed device for testing the performance of D-20 end sensors used in the electrical equipment of armored vehicles allows checking the sensors without dismantling them by regular crews of armored vehicles, which makes it possible to reduce the complexity of troubleshooting and repair processes. In addition, the device does not need power from the tank's on-board network, and the electrical circuit of the device allows the device to be used to diagnose other similar sensors and electrical system equipment.

Claims (1)

A portable device for testing the performance of end sensors, made with the ability to connect to the standard electrical connector of the tank and serving to diagnose the devices included in the electrical system of the tank, characterized in that a portable device is proposed, which consists of a body and a cover, the cover is attached to the body using screws through the holes for fastening, the screws from above are filled with varnish for tightness and fixation, and the groove between the lid and the body is filled with sealant, there are two compartments inside the body, one of which is used to accommodate an autonomous power supply connected to an electrical circuit located in another compartment , there are light indicators on the cover, the red and green light indicators are connected to the microcontroller, which gives control signals to the LEDs, the green LED signals the operability of the tested sensor, the red one signals the sensor malfunction, and the blue indicator is connected to the on button and signals the readiness of the device for operation, while on the case there is a test start button connected to the microcontroller.

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