CN219957720U - Detection voltage pulse device - Google Patents

Abstract

The utility model aims to provide a detection voltage pulse device which has low cost and high integration level, can continuously detect voltage pulses for a long time and can record the width and the amplitude of the voltage pulses. The utility model comprises a main control module, an analog-to-digital conversion module, a trigger module and a digital-to-analog conversion module, wherein the analog-to-digital conversion module, the trigger module and the digital-to-analog conversion module are all connected with the main control module, the main control module is connected with an external upper computer, the digital-to-analog conversion module is connected with the trigger module, and the analog-to-digital conversion module and the trigger module are both connected with a tested part. The utility model is applied to the technical field of detection circuits.

Description

Detection voltage pulse device

Technical Field

The utility model is applied to the technical field of detection circuits, and particularly relates to a detection voltage pulse device.

Background

With the development of the age, electronic products play an increasingly important role in our lives, and the stability and reliability of electronic products are particularly important, so that the test requirements of consumer electronic devices are also gradually improved. The stability of power supply is a very critical parameter for any electronic product, because the poor contact of the connector or the unstable power supply caused by external interference, and the occurrence of a pulse can cause the electronic product to suddenly appear abnormal, thereby affecting the experience of the user. Therefore, reliability test is required in the research and development stage of the product, the product is disturbed by equipment such as a vibration table, and the voltage pulse of the product is detected. Conventional detection schemes use standard instruments such as oscilloscopes and logic analyzers to detect voltage pulses, or directly use voltage comparators to detect the number of voltage pulses. The disadvantage of using standard instrument schemes is the very low integration level, the large size of standard instruments, and the inability to integrate into small volume measurement devices; the cost is high, and the manufacturing cost of a standard instrument is up to hundreds of thousands; the long-time continuous detection, such as logic analysis, cannot be realized, only about one minute of time can be acquired at a time, and the oscilloscope can only trigger one voltage pulse and cannot continuously acquire. The disadvantage of using a voltage comparator scheme is that only the number of times a pulse occurs can be recorded, and the time and amplitude of the pulse occurrence cannot be recorded. Therefore, it is necessary to provide a detection voltage pulse device which is low in cost, high in integration level, capable of continuously detecting a voltage pulse for a long time, and capable of recording the width and amplitude of the voltage pulse.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing the detection voltage pulse device which has low cost and high integration level, can continuously detect voltage pulses for a long time and can record the width and the amplitude of the voltage pulses.

The technical scheme adopted by the utility model is as follows: the utility model comprises a main control module, an analog-to-digital conversion module, a trigger module and a digital-to-analog conversion module, wherein the analog-to-digital conversion module, the trigger module and the digital-to-analog conversion module are all connected with the main control module, the main control module is connected with an external upper computer, the digital-to-analog conversion module is connected with the trigger module, and the analog-to-digital conversion module and the trigger module are both connected with a tested part.

According to the scheme, the detection voltage pulse device can detect pulse voltage for a long time, the frequency of the occurrence of the pulse voltage in unit time is recorded, the width and the amplitude of the pure pulse voltage are set through the digital-to-analog conversion module, different trigger voltages are set through the digital-to-analog conversion module, and the whole device is small in size and convenient to integrate. Compared with the standard instrument for measurement, the cost is greatly reduced.

In one preferred scheme, the spi_cs1 port, the spi_clk port, the spi_miso port, and the spi_mosi port of the master control module are respectively connected to ports corresponding to the analog-to-digital conversion module, the AIN0 port of the analog-to-digital conversion module is connected to the VBUS port of the tested component, and the AIN1 port of the analog-to-digital conversion module is grounded.

In one preferred scheme, the triggering module comprises a first voltage comparator and a second voltage comparator, wherein a VBUS_R port of the first voltage comparator and a VBUS_R port of the second voltage comparator are both connected with a VBUS port of a tested part, a Vref1 port of the first voltage comparator and a Vref2 port of the second voltage comparator are both connected with a Vref port of the digital-to-analog conversion module, and an OUT1 port of the first voltage comparator and an OUT2 port of the second voltage comparator are respectively connected with ports corresponding to the main control module.

In one preferred scheme, the i2c_scl port and the i2c_sda port of the digital-to-analog conversion module are respectively connected with the ports corresponding to the master control module.

In one preferred scheme, the MCU_TXD port and the MCU_RXD port of the main control module are respectively connected with ports corresponding to an external upper computer.

Drawings

FIG. 1 is a block diagram of the structure of the present utility model;

FIG. 2 is a flow chart of the present utility model;

FIG. 3 is a schematic circuit diagram of the master control module;

FIG. 4 is a schematic circuit diagram of the trigger module;

FIG. 5 is a schematic circuit diagram of the analog to digital conversion module;

FIG. 6 is a schematic circuit diagram of the digital to analog conversion module;

Detailed Description

As shown in fig. 1 and 2, in this embodiment, the present utility model includes a main control module 1, an analog-to-digital conversion module 2, a trigger module 3, and a digital-to-analog conversion module 4, where the analog-to-digital conversion module 2, the trigger module 3, and the digital-to-analog conversion module 4 are all connected with the main control module 1, the main control module 1 is connected with an external host computer 5, the digital-to-analog conversion module 4 is connected with the trigger module 3, and the analog-to-digital conversion module 2 and the trigger module 3 are both connected with a tested component 6.

As shown in fig. 3 and 5, in this embodiment, the spi_cs1 port, the spi_clk port, the spi_miso port, and the spi_mosi port of the main control module 1 are respectively connected to the ports corresponding to the analog-to-digital conversion module 2, the AIN0 port of the analog-to-digital conversion module 2 is connected to the VBUS port of the tested component 6, and the AIN1 port of the analog-to-digital conversion module 2 is grounded. The main control module 1 is in communication connection with the analog-to-digital conversion module through the SPI, the chip model of the analog-to-digital conversion module is AD7172, the AD7172 is a 24-bit high-precision ADC chip, the 24-bit ADC precision can reach 1uV, the sampling frequency can reach 31.25K at most, and the voltage signal can be effectively and continuously collected.

As shown in fig. 3 and 4, in this embodiment, the trigger module 3 includes a first voltage comparator U1 and a second voltage comparator U2, the vbus_r port of the first voltage comparator U1 and the vbus_r port of the second voltage comparator U2 are both connected with the VBUS port of the tested component 6, the Vref1 port of the first voltage comparator U1 and the Vref2 port of the second voltage comparator U2 are both connected with the Vref port of the digital-to-analog conversion module 4, and the OUT1 port of the first voltage comparator U1 and the OUT2 port of the second voltage comparator U2 are respectively connected with the ports corresponding to the main control module 1. The chip model of the first voltage comparator U1 and the chip model of the second voltage comparator U2 are ADCMP600, the bandwidth is 50MHz, the minimum pulse width which can be detected is 21ns, when the tested signal is lower than or higher than the set reference voltage, the trigger module sends out a high-level signal, and the main control module 1 collects voltage data.

As shown in fig. 3 and 6, in this embodiment, the i2c_scl port and the i2c_sda port of the digital-to-analog conversion module 4 are respectively connected to the ports corresponding to the main control module 1. The main control module 1 is in communication connection with the digital-to-analog conversion module 4 through I2C. The chip model of the digital-to-analog conversion module 4 is AD5696, and the selected device is 16-bit and 0-5V rail-to-rail output. The VREF test voltage source is set to 0-5V through AD 5696.

As shown in fig. 3, in this embodiment, the mcu_txd port and the mcu_rxd port of the master control module 1 are respectively connected to ports corresponding to the external host computer 5. The main control module 1 is in communication connection with an external upper computer 5 through a UART serial port.

In this embodiment, the chip model of the main control module 1 is STM32F103TBU6, which has a flash memory of 128Kb, so as to ensure a sufficient data storage space, and the analog-to-digital conversion module 2 provides high-precision analog-to-digital conversion for the collected analog signals.

In this embodiment, when the detection voltage pulse device is applied to other systems, the lower analog-to-digital conversion module and the digital potentiometer can be adjusted and replaced according to the actual measurement accuracy requirement, for example, the analog-to-digital conversion module is removed, and the analog-to-digital conversion of the main control module and the 8-bit digital potentiometer are used; the voltage comparator can be adjusted and replaced according to the width of the voltage pulse, and the voltage comparator with higher bandwidth and lower detection minimum pulse time and the analog-to-digital conversion module with higher sampling rate are selected.

The working principle of the utility model is as follows: the external vibration table is used for electrifying a tested part, the digital-to-analog conversion module outputs 0-5V reference voltage, the main control module is used for detecting voltage signals, when the detection voltage is higher than or lower than the reference voltage, the trigger module is used for sending a high-level signal to trigger the main control module to collect data 1S, the analog-to-digital conversion module is used for effectively and continuously collecting the voltage signals, after the data collection is finished, the main control module is used for transmitting the data to an external upper computer, and when the set detection time is reached, the external upper computer is used for calculating the times of occurrence of pulse voltage through the data, and the width and the amplitude of each pulse.

Claims (5)

1. A device for detecting voltage pulses, characterized by: the digital-to-analog conversion device comprises a main control module (1), an analog-to-digital conversion module (2), a trigger module (3) and a digital-to-analog conversion module (4), wherein the analog-to-digital conversion module (2) the trigger module (3) and the digital-to-analog conversion module (4) are connected with the main control module (1), the main control module (1) is connected with an external upper computer (5), the digital-to-analog conversion module (4) is connected with the trigger module (3), and the analog-to-digital conversion module (2) and the trigger module (3) are connected with a tested part (6).

2. A detection voltage pulse apparatus as defined in claim 1, wherein: the SPI_CS1 port, the SPI_CLK port, the SPI_MISO port and the SPI_MOSI port of the main control module (1) are respectively connected with the corresponding ports of the analog-to-digital conversion module (2), the AIN0 port of the analog-to-digital conversion module (2) is connected with the VBUS port of the tested component (6), and the AIN1 port of the analog-to-digital conversion module (2) is grounded.

3. A detection voltage pulse apparatus as defined in claim 1, wherein: the trigger module (3) comprises a first voltage comparator (U1) and a second voltage comparator (U2), wherein a VBUS_R port of the first voltage comparator (U1) and a VBUS_R port of the second voltage comparator (U2) are both connected with a VBUS port of a tested component (6), a Vref1 port of the first voltage comparator (U1) and a Vref2 port of the second voltage comparator (U2) are both connected with a Vref port of the digital-analog conversion module (4), and an OUT1 port of the first voltage comparator (U1) and an OUT2 port of the second voltage comparator (U2) are respectively connected with ports corresponding to the main control module (1).

4. A detection voltage pulse apparatus as defined in claim 1, wherein: and an I2C_SCL port and an I2C_SDA port of the digital-to-analog conversion module (4) are respectively connected with the ports corresponding to the main control module (1).

5. A detection voltage pulse apparatus as defined in claim 1, wherein: and the MCU TXD port and the MCU RXD port of the main control module (1) are respectively connected with ports corresponding to an external upper computer (5).