CN217690418U

CN217690418U - Current counting USB digital display device

Info

Publication number: CN217690418U
Application number: CN202221705215.XU
Authority: CN
Inventors: 刘培高
Original assignee: Shenzhen Tianma Information Technology Co ltd
Current assignee: Shenzhen Tianma Information Technology Co ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-10-28
Anticipated expiration: 2032-07-01

Abstract

The utility model discloses an ammeter number USB digital display device, which comprises a first USB joint, a second USB joint and a data wire; first USB connects and includes the USB chip, power supply and singlechip and LED display screen, and power supply supplies power for USB chip and singlechip, and external transmission data transmits from the differential signal transmission interface of USB chip, and the LED display screen has a plurality of diodes, connects on the output port of singlechip, and external current passes through the USB chip and is connected with the input pin of singlechip, the utility model discloses a set up the USB chip, the singlechip, the LED display screen, steady voltage chip and outage data protection chip count the detection to the electric current, and the electric current changes once, and the singlechip can count and show on the LED display screen, makes things convenient for the record of data, connects outage data protection chip simultaneously, when the circuit outage, saves and protects the data of singlechip record.

Description

Current counting USB digital display device

Technical Field

The utility model belongs to the field, specifically speaking relates to an ammeter number USB digital display device.

Background

The digital display meter is a short-term digital display meter, generally an LED or an LCD is used as a display medium, and because of the characteristics of visual intuition, convenient setting, high intelligent control degree, and the like, the digital display meter has continuously powerful functions and continuously improved precision with the rapid development of the current sensing technology, and the digital display meter is replacing a large number of traditional mechanical meters, and has been widely applied to various industries and daily life.

With the development of social science and technology, electronic devices are more and more popular, the service life of the electronic devices also becomes a standard for evaluating the quality of a product, and for a traditional testing mode, the electronic devices are only required to continuously work, and then the service life of the electronic devices is obtained, but a proper detection mode is not provided for the use times of the products, so that the service life is not detected comprehensively.

Currently, in the USB function test, there is a method of continuously and cyclically plugging and unplugging the USB so as to verify the connection data reading performance of the USB. The current operation mode is to manually plug and unplug the USB, and count the total plugging times and the successful connection times continuously. However, this approach has 2 disadvantages:

(1) The continuous plugging of the USB easily causes excessive friction and looseness of the clamping groove;

(2) And if the number of connection verification times is large, data statistics is difficult and errors are easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves lies in overcoming prior art not enough, provides an ampere meter number USB digital display device, for solving above-mentioned technical problem, the utility model discloses a technical scheme's basic design is:

an ammeter number USB digital display device comprises:

the terminal equipment comprises a first USB joint, a second USB joint and a data wire, wherein the first USB joint and the second USB joint are used for being connected with terminal equipment in a plug-pull mode;

the first USB joint comprises a USB chip, a power supply, a single chip microcomputer and an LED display screen, wherein the power supply supplies power for the USB chip and the single chip microcomputer, external transmission data are transmitted from a differential signal transmission interface of the USB chip, the LED display screen is provided with a plurality of diodes to form display and is connected to an output port of the single chip microcomputer, external current is connected with an input pin of the single chip microcomputer through the USB chip, changes of the current are counted, and the current is displayed on the LED display screen.

Preferably, the output end of the power supply is connected with a voltage stabilization chip, the output voltage is changed to supply power to the USB chip, and the output voltage can be further stabilized.

Preferably, the output end of the voltage stabilizing chip is connected with the bypass capacitor in parallel and grounded, and the voltage and current output by the voltage stabilizing chip are not uniform enough, so that the bypass capacitor is used for current supplement or consumption.

Preferably, the output end of the power supply is connected in parallel with an electrostatic diode and grounded, and the electrostatic diode is used for protecting the circuit, so that the voltage is prevented from being overhigh, and meanwhile, electrostatic protection is also performed.

Preferably, the current input end of the USB chip is connected with a protection circuit in parallel and is grounded, so that overcurrent damage to the USB chip caused by overlarge current is prevented.

Preferably, the current input end of the USB chip is connected in series with a filter circuit and is connected to the input port of the single chip microcomputer.

Preferably, a data signal interface of the clock signal interface of the single chip microcomputer is connected with a power-off data protection chip, and data can be stored when the power is off.

Compared with the prior art, the utility model following beneficial effect has:

through setting up USB chip, singlechip, LED display screen, steady voltage chip and outage data protection chip, count the detection through the singlechip to the electric current, the electric current changes once, and the singlechip can count and show on the LED display screen, makes things convenient for the record of data, and the utility model discloses have the function of flicker filtering, 0.2 s' switch-on or interrupt signal can not arouse the change that the LED display screen shows the number of times, has improved the accuracy of this scheme count; and simultaneously the utility model discloses be provided with outage data protection chip, when the circuit outage, save and protect the data of singlechip record, prevent losing of data, also make things convenient for more thoroughly and comprehensive of electronic component's life-span detection.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

In the drawings:

fig. 1 is a schematic structural view of an amperometric USB digital display device according to the present invention;

FIG. 2 is a circuit diagram of the single chip microcomputer according to the present invention;

FIG. 3 is a circuit diagram of the voltage regulator chip of the present invention;

FIG. 4 is a circuit diagram of the power-off data protection chip of the present invention;

fig. 5 is a circuit diagram of the LED display screen array of the present invention.

In fig. 1 to 5:

100. a first USB connector; 200. a second USB connector; 300. a data conductor;

1. a USB chip; 2. a power supply; 3. a single chip microcomputer; 4. an LED display screen; 5. a voltage stabilization chip; 6. a bypass capacitor; 7. an electrostatic diode; 8. a protection circuit; 9. a filter circuit; 10. and powering off the data protection chip.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention.

Fig. 1 to fig. 5 show, the utility model provides an ammeter number USB digital display device, include:

a first USB connector 100 and a second USB connector 200 for plug-in connection with a terminal device, and a data line 300 for connecting the first USB connector 100 and the second USB connector 200;

first USB connects 100 including USB chip 1, power supply 2 and singlechip 3 and LED display screen 4, power supply 2 supplies power for USB chip 1 and singlechip 3, external transmission data transmits from USB chip 1's differential signal transmission interface, LED display screen 4 has a plurality of diodes to constitute the demonstration, connect on singlechip 3's output port, external current passes through USB chip 1 and is connected with singlechip 3's input pin, count the change of electric current, show from going up on LED display screen 4.

When the current changes, the single chip microcomputer 3 is triggered to start counting, the single chip microcomputer 3 triggers the LED display screen 4 to display the times, the number of the diodes is 28 in total, the array is arranged into 4 8-character shapes, the 28 diodes are divided into 4 groups, the output ports of the diodes are respectively connected to 1COM, 2COM, 3COM and 4COM ports of the single chip microcomputer 3, and the input ports of the 7 diodes of each group are respectively connected to A, B, C, D, E, F and G7 ports of the single chip microcomputer 3.

The output end of the power supply 2 is connected with a voltage stabilizing chip 5, the voltage stabilizing chip 5 selects HT7133, the output voltage is 3.3V, the output voltage is changed to supply power for the USB chip 1, the power supply 2 at the input end of the power supply is 5-20V, the output end of the voltage stabilizing chip 5 is connected with a bypass capacitor 6 and grounded, energy is provided for a used device, the output of the voltage stabilizing chip 5 is more uniform, the load requirement is reduced, the impedance is reduced as much as possible, the interference of input signals is filtered, and the output signals are more stable.

And the output end of the power supply 2 is connected with an electrostatic diode 7 in parallel and grounded, and the electrostatic diode 7 performs overvoltage and anti-static protection on the input and output end of transmission.

The current input end of the USB chip 1 is connected with a protection circuit 8 in parallel and is grounded, the protection circuit 8 comprises two resistors connected in parallel, overvoltage protection and electrostatic protection can be prevented, and meanwhile, the USB chip 1 also comprises a data transmission chip.

USB chip 1's current input end is established ties and is had filter circuit 9 and be connected to singlechip 3's input port, and filter circuit 9 includes electric capacity and resistance, to producing the electric current filtering clutter in the circuit for the wave form of current output is more stable, and this scheme has the flicker filtering capability, and 0.2s ' switch-on or interrupt signal can not arouse the change that LED display screen 4 shows the number of times, has improved the accuracy of this scheme count.

The data signal interface of the clock signal interface of the single chip microcomputer 3 is connected with a power-off data protection chip 10, the power-off data protection chip 10 selects a chip AT24C, the SCL end and the SDA end of the power-off data protection chip are respectively connected with the SCL end and the SDA end of the single chip microcomputer 3, and data in the single chip microcomputer 3 are stored and protected after power-off, so that data loss is prevented.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an ammeter number USB digital display device which characterized in that includes:

a first USB connector (100) and a second USB connector (200) for plug-in connection with a terminal device, and a data line (300) for connecting the first USB connector (100) and the second USB connector (200);

first USB connects (100) and includes USB chip (1), power supply (2) and singlechip (3) and LED display screen (4), power supply (2) supplies power for USB chip (1) and singlechip (3), external transmission data transmits from the differential signal transmission interface of USB chip (1), LED display screen (4) have a plurality of diodes to constitute the demonstration, connect on the output port of singlechip (3), external current passes through USB chip (1) and is connected with the input pin of singlechip (3), count the change of electric current, show from going up on LED display screen (4).

2. An amperometric USB digital display device according to claim 1, characterized in that the output end of the power supply (2) is connected with a voltage stabilizing chip (5) to change the output voltage for supplying power to the USB chip (1).

3. An amperometric USB digital display device according to claim 2, characterized in that the output end of the voltage stabilizing chip (5) is connected with a bypass capacitor (6) in parallel and grounded.

4. An amperometric USB digital display device according to claim 2, wherein the output end of the power supply (2) is connected in parallel with an electrostatic diode (7) and is grounded.

5. A current counting USB digital display device according to claim 4, characterized in that the current input end of the USB chip (1) is connected with the protection circuit (8) in parallel and grounded.

6. A current counting USB digital display device according to claim 5, characterized in that the current input end of the USB chip (1) is connected in series with a filter circuit (9) and is connected to the input port of the single chip microcomputer (3).

7. A current counting USB digital display device according to claim 1, characterized in that the data signal interface of the clock signal interface of the single chip microcomputer (3) is connected with a power-off data protection chip (10).