AC / DC universal multifunctional electroscope testing device

Abstract

The utility model discloses an AC / DC universal multifunctional electroscope testing device. The testing device comprises a voltage processing part, a logic signal data processing part and an interaction part which are connected in sequence. The voltage processing part comprises a lithium battery, a step-down circuit, a high-voltage generation loop, an adjustable resistor, a relay and an output terminal; the logic signal data processing part comprises a single-chip microcomputer, a voltage detection loop, a current detection loop and a temperature sensor. The interaction part comprises an OLED (Organic Light Emitting Diode) display screen, keys, an LED indicating lamp and a buzzer; the multifunctional electroscope testing device has the beneficial effects that the multifunctional electroscope testing device has alternating-current and direct-current and wide-voltage output functions, meets the function testing requirements of various electroscopes, realizes multiple purposes, shortens the operation time of the function testing process of the electroscopes, fills up the blank of the alternating-current and direct-current universal multifunctional electroscope testing device in the market, improves the use reliability of the electroscopes, and is suitable for popularization and application. And the operation safety of personnel and equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary equipment for substation maintenance function testing, and particularly relates to an AC / DC universal multi-functional electrical voltage detector testing device. Background Art

[0002] In view of the need for voltage detectors of various types and grades to be used in the power-off maintenance and inspection of high-voltage substation equipment, and the cumbersome and dangerous function verification process, there is a need to simplify the verification process and reduce the operation risk to ensure the safety of maintenance personnel and equipment. Therefore, an AC / DC universal multi-functional electrical voltage detector testing device is designed to greatly improve the efficiency of the function test and inspection of the electrical voltage detector and reduce the risk during the function test of the electrical voltage detector. By generating a test signal for the electrical voltage detector, the function of the electrical voltage detector is inspected to realize the function test of the electrical voltage detector within the voltage ranges such as AC 10 kV, AC 35 kV, and DC 1500 V, reduce the potential safety hazard caused by the imperfect self-check function of the electrical voltage detector, and fill the market gap of such electrical voltage detector testing devices.

[0003] Before use, the function of the electrical voltage detector needs to be tested to ensure that the electrical voltage detector is used to detect the equipment when its function is normal. Only using the self-check button on the electrical voltage detector itself cannot comprehensively test the function of the electrical voltage detector. There may be a fault in the circuit from the probe of the electrical voltage detector to the internal live detection circuit. The self-check button detection is not comprehensive, and it cannot ensure the correct and sensitive output of the alarm signal. To prevent the equipment from being charged due to the failure of the electrical voltage detector and the electrical voltage detector having no audible and visual alarm, there are potential safety hazards to personnel and equipment. If this device is used for the function test of the electrical voltage detector, the following problems will be solved: First, there are significant safety hazards in the traditional function inspection of the electrical voltage detector. Simply using the self-check button function of the electrical voltage detector cannot fully ensure the normal test circuit of the electrical voltage detector. Conducting function tests on equipment that is not powered off at the construction site requires opening the rear cabinet door of the equipment, posing risks of human error and electric shock. Second, when using high-voltage generating equipment to test the function of the electrical voltage detector, the equipment is not easy to carry and operate simply. High-voltage generators are usually used for preventive tests, with a large volume and a relatively single output function. When testing the functions of AC and DC electrical voltage detectors, two devices need to be called, and the operation of the devices requires professional operators with experience. The wiring is cumbersome and the usage threshold is high, making it impossible to achieve function integration and specialization. Third, on the basis of realizing the function test of electrical voltage detectors with multiple voltage types and a wide voltage range, the function is expanded to output an adjustable DC low-voltage secondary power supply for troubleshooting in the maintenance and repair of substation equipment, realizing the function expansion. Therefore, in combination with the on-site situation of the electrical voltage detector function test and the production and use requirements, a multi-voltage type and wide-voltage range electrical voltage detector function test device is researched and invented to reduce the potential safety hazard caused by the imperfect self-check function of the electrical voltage detector.

[0004] After research, most of the common electrical voltage detectors testing devices on the market are power frequency or high-frequency low-voltage AC electrical voltage detectors calibration and testing devices. There is no such AC / DC universal and wide voltage range electrical voltage detector function testing device in equipment manufacturers and the market. To fundamentally solve the above production and safety problems, ensure the standard and safe use process of electrical voltage detectors, protect the safety of personnel and equipment, reduce the operation process and operation risks of electrical voltage detector function testing, and realize the integration, specialization and portability of electrical voltage detector function testing devices, a "universal AC / DC multi-functional electrical voltage detector testing device" is specially developed. Content of the Utility Model

[0005] In order to overcome the problems that the traditional electrical voltage detector function needs to be tested on the equipment with confirmed live power on site, the voltage type is single, the voltage level is fixed, the output voltage sampling display is inaccurate, and it cannot be used for multiple purposes, etc., the utility model provides a universal AC / DC multi-functional electrical voltage detector testing device.

[0006] The technical solution adopted by the utility model to achieve the above purpose is: it includes a voltage processing part, a logic signal data processing part and an interaction part connected in sequence; the voltage processing part includes a lithium battery, a step-down circuit, a high-voltage generating circuit, an adjustable resistor, a relay and an output terminal, the lithium battery is connected to the step-down circuit, the lithium battery is connected to the high-voltage generating circuit, the high-voltage generating circuit is respectively connected to the adjustable resistor and the relay, the relay is connected to the output terminal, and the output terminal outputs voltage; the logic signal data processing part includes a single-chip microcomputer, a voltage detection circuit, a current detection circuit and a temperature sensor, and the voltage detection circuit, the current detection circuit and the temperature sensor are respectively connected to the single-chip microcomputer; the interaction part includes an OLED display screen, a key, an LED indicator light and a buzzer, and the OLED display screen, the key, the LED indicator light and the buzzer are respectively connected to the single-chip microcomputer.

[0007] Preferably, when the capacity of the lithium battery is not enough to provide the normal output operating voltage, the lithium battery can be charged through a power adapter, and the lithium battery is provided with a charging port.

[0008] Preferably, the voltage detection circuit and the current detection circuit respectively collect the voltage and current data of the high-voltage generating circuit.

[0009] The working principle of the voltage processing part is that the lithium battery provides a 12V power supply voltage output, the step-down chip in the step-down circuit converts the 12V voltage to 5V voltage to provide a stable 5V operating power supply for the logic signal data processing part and the interaction part. At the same time, the 12V power supply provides the primary voltage for the high-voltage generating circuit. The high-voltage generating circuit internally converts the 12V voltage to a high-frequency AC low voltage and at the same time converts it to a DC voltage. The adjustable resistor adjusts the output size of the DC voltage, and the relay controls the voltage output of the high-voltage generating circuit, and the voltage is output externally through the output terminal.

[0010] The working principle of the logic signal data processing part is that the logic signal data processing part collects the voltage, current and temperature data of the voltage processing part, conducts operation protection logic judgment, measures and converts the lithium battery capacity through a group of voltage detection circuits, and similarly converts the output voltage through another group of voltage detection circuits, and converts the output current through the current detection circuit. The converted voltages are all sent to the single-chip microcomputer for signal processing, converting the analog quantity of the voltage into a digital quantity that the single-chip microcomputer can process, conducting voltage and current protection logic judgment processing, detecting the working temperature of the lithium battery by the temperature sensor, transmitting the temperature data to the single-chip microcomputer, conducting temperature protection logic judgment, and transmitting the above operation data to the OLED display screen of the interaction part for operation data display and interaction.

[0011] When the output voltage and output current exceed the protection set value, the single-chip microcomputer makes signal logic judgment processing to turn off the output and realize the protection of the output function. When the voltage of the lithium battery is lower than the set voltage value, the single-chip microcomputer outputs a signal to the interaction part to give a prompt. When the temperature exceeds the use set value, the single-chip microcomputer makes logic judgment processing to prohibit the output and at the same time turn off the device, realizing signal processing and protection functions.

[0012] The working principle of the interaction part is that the logic signal data processing part outputs control signals and display signals, enabling the OLED display screen to display data such as the device operation status, output voltage, output current, operating temperature, protection value, version information, etc. The keys cooperate with the OLED display screen to provide interactive settings, control the on / off of the output circuit and adjust the protection value. The LED indicator and buzzer form an audible and visual alarm, which is used for clearly warning in the abnormal operation state of the device.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. AC / DC and wide-voltage output, solving the functional test requirements of various electrical detectors, realizing multi-purpose in one machine, shortening the operation time of the electrical detector functional test process, and filling the gap in the market for AC / DC universal multi-functional electrical detector test devices.

[0015] 2. Improving the reliability of the use of electrical detectors and ensuring the safety of personnel and equipment operation;

[0016] 3. While conducting the test function of the AC electrical detector, adding the test function of adjustable DC output for the electrical detector, adjusting the voltage for the voltage range of the DC electrical detector, and being able to test the sensitivity of the DC electrical detector. At the same time, the DC electrical detector is widely used for voltage testing of the contact rail (catenary) in the rail transit industry. This design is more in line with the use in the rail transit industry. For the operation scenario of voltage testing containing both AC and DC voltage levels, it can simultaneously conduct on-site tests on AC and DC electrical detectors, realizing the integration and convenience of functions and achieving the purpose of convenient and fast testing of electrical detectors. Description of the Drawings

[0017] Figure 1 is a schematic block diagram of the principle composition of a multi-functional AC / DC universal electrical detector testing device; Detailed Implementation Manner

[0018] As Figure 1 shown, the multi-functional AC / DC universal electrical detector testing device of the present utility model is composed of three major modules: a voltage processing part, a logic signal data processing part, and an interaction part.

[0019] 1. The voltage processing part is composed of a lithium battery, a buck circuit, a high-voltage generating circuit, a variable resistor, a relay, and an output terminal. The lithium battery is connected to the buck circuit, the lithium battery is connected to the high-voltage generating circuit, the high-voltage generating circuit is connected to the variable resistor and at the same time connected to the relay, the relay is connected to the output terminal, and the output terminal outputs voltage.

[0020] Its working principle is that the lithium battery provides a 12V power supply voltage output. The buck chip in the buck circuit converts the 12V voltage to 5V voltage to provide a stable 5V operating power supply for the logic signal data processing part and the interaction part. At the same time, the 12V power supply provides the primary voltage for the high-voltage generating circuit. The high-voltage generating circuit internally converts the 12V voltage to a high-frequency AC low voltage and at the same time converts it to a DC voltage. The variable resistor adjusts the magnitude of the DC voltage output. The relay is used to control the voltage output of the high-voltage generating circuit, and the voltage is output externally through the output terminal.

[0021] When the capacity of the lithium battery is insufficient to provide the normal output operating voltage, the lithium battery can be charged through a power adapter. The lithium battery is provided with a charging port.

[0022] 2. The logic signal data processing part is composed of a single-chip microcomputer, a voltage detection circuit, a current detection circuit, and a temperature sensor. The voltage detection circuit, the current detection circuit, and the temperature sensor are respectively connected to the single-chip microcomputer. Its working principle is as follows: The logic signal data processing part collects the voltage, current, and temperature data of the voltage processing part, conducts an operation protection logic judgment. The capacity of the lithium battery is measured and converted through a group of voltage detection circuits. Similarly, the output voltage is converted through another group of voltage detection circuits. The output current is converted by the current detection circuit. All the converted voltages are sent to the single-chip microcomputer for signal processing, converting the analog quantity of the voltage into a digital quantity that the single-chip microcomputer can process, conducting a voltage and current protection logic judgment process. The temperature sensor detects the operating temperature of the lithium battery, and the temperature data is transmitted to the single-chip microcomputer for temperature protection logic judgment, and the above operating data is transmitted to the OLED display screen of the interaction part for operation data display and interaction.

[0023] When the output voltage and output current exceed the protection set value, the single-chip microcomputer makes signal logic judgment and processing, shuts off the output, and realizes the protection of the output function. When the voltage of the lithium battery is lower than the set voltage value, the single-chip microcomputer outputs a signal to the interaction part to make a prompt. When the temperature exceeds the set value for use, the single-chip microcomputer makes logic judgment and processing, prohibits the output, and at the same time shuts down the device to realize the signal processing and protection functions.

[0024] The voltage detection circuit and the current detection circuit respectively collect the voltage and current data of the high-voltage generating circuit.

[0025] 3. The interaction part includes an OLED display screen, buttons, LED indicators, and a buzzer. The OLED display screen, buttons, LED indicators, and buzzer are respectively connected to the single-chip microcomputer. The working principle is as follows: The control signal and display signal are output by the logic signal data processing part, so that the OLED display screen displays the operating state of the device and data such as output voltage, output current, operating temperature, protection value, version information, etc. The buttons cooperate with the OLED display screen to provide interactive settings, control the on / off of the output circuit and adjust the protection value. The LED indicators and the buzzer form an audible and visual alarm, which is used for clear warning in the abnormal operating state of the device.

Claims

1. A universal AC / DC multifunctional electroscope test device, characterized in that: It includes a voltage processing part, a logic signal data processing part and an interaction part which are connected in sequence; the voltage processing part includes a lithium battery, a step-down circuit, a high-voltage generating circuit, an adjustable resistor, a relay and an output terminal, the lithium battery is connected to the step-down circuit, the lithium battery is connected to the high-voltage generating circuit, the high-voltage generating circuit is respectively connected to the adjustable resistor and the relay, the relay is connected to the output terminal, and the output terminal outputs voltage; the logic signal data processing part includes a single-chip microcomputer, a voltage detection circuit, a current detection circuit and a temperature sensor, the voltage detection circuit, the current detection circuit and the temperature sensor are respectively connected to the single-chip microcomputer; the interaction part includes an OLED display screen, a button, an LED indicator light and a buzzer, the OLED display screen, the button, the LED indicator light and the buzzer are respectively connected to the single-chip microcomputer.

2. The AC / DC universal multifunctional electroscope test device according to claim 1, characterized in that: The lithium battery is provided with a charging port.

3. The AC / DC universal multifunctional electroscope test device according to claim 1, characterized in that: The voltage detection circuit and the current detection circuit respectively collect voltage and current data of the high voltage generating circuit.

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