Digital display terminal

Abstract

The utility model discloses a digital display terminal, which belongs to the technical field of high-power inverter power supplies and comprises a power supply and signal input end, a signal processing end, a chip processing end, a reference voltage end, a signal output end, a decimal point control end and a program burning end. The signal processing end, the decimal point control end, the chip processing end, the reference voltage end and the program burning end are all connected with the power supply and signal input end, and the signal processing end, the decimal point control end, the reference voltage end, the program burning end and the signal output end are all connected with the chip processing end. The utility model is widely applied to various welding devices, the output display is finer, and the readability of data is improved. The digital display terminal solves the problems of low resolution, high cost and high risk in the prior art.

Description

Technical Field

[0001] The utility model relates to the field of high-power inverter power supply, in particular to a digital display terminal. Background Art

[0002] At present, low resolution is a prominent problem. Most terminal display devices use 8-bit or 10-bit resolution, which may meet the needs in some application scenarios where the precision requirements are not particularly high. However, in the field of high-power welding machines, more accurate numerical display is often required to control the welding process. Therefore, low-resolution display devices often cannot meet the actual production needs. This not only affects the stability of welding quality, but may also increase the difficulty of operation and reduce production efficiency.

[0003] The high cost of the core chip for signal processing is also an important factor that restricts the performance improvement of terminal display devices. At present, although some high-end display devices on the market have high resolution, they often use high-cost imported chips or customized chips. This not only increases the overall cost of the equipment, but also makes it difficult for some small-scale enterprises or enterprises with limited budgets to afford it. At the same time, the prices of these chips are also easily affected by various factors such as the international environment and market supply and demand, resulting in large price fluctuations, which brings great challenges to the cost control of enterprises.

[0004] Terminal display devices that use imported or customized chips as core components also face many risks in post-production. Uncertainty in the supply cycle may disrupt production plans, changes in the international environment may affect the stability of chip supply, and vicious price increases may bring additional cost pressure to companies. These factors may cause production delays, extended construction periods, and other problems, which in turn affect the market competitiveness of companies. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a digital display terminal that solves the above-mentioned problems of low resolution, high cost and high risk.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] This solution provides a digital display terminal, including a power supply and signal input terminal, a signal processing terminal, a chip processing terminal, a reference voltage terminal, a signal output terminal, a decimal point control terminal and a program burning terminal;

[0008] The signal processing end, decimal point control end, chip processing end, reference voltage end and program burning end are all connected to the power supply and signal input end, and the signal processing end, decimal point control end, reference voltage end, program burning end and signal output end are all connected to the chip processing end.

[0009] Beneficial effects of the utility model: The utility model provides a high-resolution digital display terminal with complete functions, stable performance and convenient operation. By adopting a 12-bit high-resolution digital display terminal, it can realize accurate display of signal voltage, greatly improving the accuracy and readability of data.

[0010] Furthermore, the chip processing end adopts a control chip U1 of model STC8H4K64TL, the 5th pin of the chip U1 is connected to the signal processing end, the 6th pin of the chip U1 is connected to the decimal point control end, the 7th pin, the 29th pin to the 36th pin, and the 41st pin to the 42nd pin of the chip U1 are all connected to the signal output end; the 15th pin of the chip U1 is connected to the power supply and signal input end, the 16th pin of the chip U1 is connected to the reference voltage end, and the 19th pin and the 20th pin of the chip U1 are connected to the program burning end.

[0011] The beneficial effect of the above further solution is that the chip processing end can control the decimal point display of the LED digital tube according to actual needs. This design makes the decimal point display more flexible and adapts to the needs of different application scenarios.

[0012] Furthermore, the power supply and signal input end adopts a plug-in J1 with model CON:3.96-5, the first pin of the plug-in J1 is connected to the signal processing end, the decimal point control end, the reference voltage end, the program burning end and the 15th pin of the chip U1, and is connected to a 5V power supply, the second pin of the plug-in J1 is connected to the signal processing end, the third and fourth pins of the plug-in J1 are the signal ground and the power supply ground, and the fifth pin of the plug-in J1 is connected to the decimal point control end.

[0013] The beneficial effects of the above further scheme are: by integrating power supply and signal input, optimizing power supply input stability, improving signal processing convenience, enhancing the reliability of grounding design and improving the flexibility of decimal point control, the performance and ease of use of the digital display terminal of the utility model are further improved, making it more advantageous in practical applications.

[0014] Furthermore, the signal processing end includes a switch S1, a switch S2, a switch S3, a switch S4, a resistor R 14 , resistor R 15 , resistor R 16 , resistor R 17 , resistor R 18 , resistor R 19 , capacitor C1, capacitor C6, adjustable resistor TS and diode D2; one end of the switch S1, switch S2, switch S3 and switch S4 are all connected to the second pin of the plug-in J1, and the other ends of the switch S1, switch S2, switch S3 and switch S4 are connected to the resistor R one by one.17 One end of the resistor R 16 One end of the resistor R 15 One end and the resistor R 14 One end of the resistor R 17 The other end, resistor R 16 The other end, resistor R 15 The other end and resistor R 14 The other end is connected to the resistor R 18 One end of the resistor R 18 The other end is connected to one end of capacitor C6, one end of capacitor C1, and resistor R 19 The other end of the capacitor C6 is connected to the ground. The other end of the capacitor C1 is connected to the sliding end of the adjustable resistor TS and is also connected to the ground. 19 The other end of the diode D2 is connected to one end of the adjustable resistor TS, the other end of the adjustable resistor TS is grounded, and the cathode of the diode D2 is connected to the first pin of the plug-in J1.

[0015] The beneficial effects of the above further scheme are: through the signal filtering circuit, high-frequency noise and interference in the signal are effectively filtered out, the stability and accuracy of the signal are improved, the signal is calibrated and fine-tuned to ensure the accuracy of signal processing, and the diode D2 plays a protective role. When the input signal voltage is too high, it can prevent the chip processing end from being damaged, thereby enhancing the safety and stability of the equipment.

[0016] Furthermore, the signal output end adopts LED: 4-bit chip select common anode digital tube chip U2, and the 1st to 12th pins of the chip U2 are connected one by one with the 32nd pin, 31st pin, 7th pin, 30th pin, 42nd pin, 33rd pin, 29th pin, 34th pin, 35th pin, 41st pin, 18th pin and 36th pin of the chip U1.

[0017] The beneficial effect of the above further scheme is: by connecting the pins of the chip processing terminal U1 with the pins of the signal output terminal U2 in a one-to-one correspondence, the direct connection reduces the intermediate links of the signal transmission, thereby improving the efficiency of signal transmission and reducing the possibility of signal attenuation and distortion.

[0018] Furthermore, the reference voltage end includes capacitor C4, capacitor C5, capacitor C7, voltage regulator WY1, resistor R9, electrolytic capacitor E1 and diode D1; one end of the capacitor C5 is respectively connected to the reference end and cathode of the voltage regulator WY1, one end of the resistor R9 and the 16th pin of the chip U1, the other end of the capacitor C5 is respectively connected to the anode of the voltage regulator WY1, the negative electrode of the electrolytic capacitor E1, the positive electrode of the diode D1, one end of the capacitor C4 and one end of the capacitor C7, and is grounded, and the other end of the resistor R9 is respectively connected to the positive electrode of the electrolytic capacitor E1, the negative electrode of the diode D1, the other end of the capacitor C4, the other end of the capacitor C7 and the 1st pin of the plug-in J1.

[0019] The beneficial effect of the above further scheme is that high-frequency noise and interference in the power supply can be effectively filtered out by capacitors C4, C5 and C7, thereby ensuring the purity and stability of the reference voltage. The presence of diode D1 prevents reverse voltage and protects other components in the circuit from damage.

[0020] Furthermore, the decimal point control terminal includes a resistor R 20 , resistor R 21 and grounding capacitor C3;

[0021] The resistor R 20 One end of the plug-in J1 and the 5th pin of the resistor R 20 One end of the resistor R 20 The other end of the resistor R 21 The other end is connected to the grounding capacitor C3 and the 6th pin of the chip U1 respectively.

[0022] The beneficial effect of the above further solution is: through the resistor R 20 and resistor R 21 It plays the role of current limiting and voltage dividing, ensuring the stability of the control signal. At the same time, capacitor C3 is used for filtering, further reducing the impact of noise and interference on the control signal.

[0023] Furthermore, the program burning end uses a plug-in J2 of model PROG:2.54-5, and the plug-in J2 includes pins 1 to 4, a resistor R 22 And the resistor R 23 The first pin of J2 is connected to the first pin of the plug-in J1, and the second pin of J2 is connected to the resistor R 22 One end of the resistor R 22 The other end is connected to the 19th pin of the chip U1, and the 3rd pin of J2 is connected to the resistor R 23 One end of the resistor R 23The other end of J2 is connected to the 20th pin of the chip U1, and the 4th pin of J2 is grounded.

[0024] The beneficial effect of the above further solution is that the resistor R 22 and resistor R 23 It plays a role of current limiting and protection in the circuit, ensuring the current stability during the burning process and avoiding chip damage caused by excessive current. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a principle block diagram of a digital display terminal of the utility model;

[0026] Figure 2 The utility model is a circuit schematic diagram of a digital display terminal. DETAILED DESCRIPTION

[0027] The specific implementation methods of the utility model are described below to facilitate technical personnel in this technical field to understand the utility model, but it should be clear that the utility model is not limited to the scope of the specific implementation methods. For ordinary technical personnel in this technical field, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all utility model creations using the concept of the utility model are protected.

[0028] Example

[0029] like Figure 1 As shown, the utility model provides a digital display terminal, including a power supply and signal input terminal, a signal processing terminal, a chip processing terminal, a reference voltage terminal, a signal output terminal, a decimal point control terminal and a program burning terminal;

[0030] The signal processing end, decimal point control end, chip processing end, reference voltage end and program burning end are all connected to the power supply and signal input end, and the signal processing end, decimal point control end, reference voltage end, program burning end and signal output end are all connected to the chip processing end.

[0031] The power supply and signal input end are powered by +5VDC, and are connected through the 1st pin "+" and the 3rd pin "-" of the CON:3.96-5 plug-in J1, and the signal is connected from the 2nd pin; the input signal is switched to different gears through the signal processing end switches S1, S2, S3 and S4, the signal is filtered by capacitors C1 and C6, the adjustable resistor TS is used for signal calibration, and the diode D2 provides signal clamping protection. The processed data is sent to the chip processing end through the 5th pin of the chip U2; the chip processing end is controlled by an internal program to convert the 12-bit high-precision data into the corresponding segment code and chip select signal; the segment code and chip select signal The signal is output to the signal output terminal LED: 4-bit chip select common anode digital tube, which displays the current signal voltage; the reference voltage terminal uses the 2.5V stable voltage provided by the voltage regulator WY1 as the input signal and is input to the chip processing end through the 16th pin of the chip U1; the 5th pin of the plug-in J1 at the power supply and signal input end controls the decimal point control end, and the decimal point control end controls the tens decimal point of the LED digital tube. When the 5th pin and the 4th pin of the plug-in J1 are short-circuited, the tens decimal point lights up, and when disconnected, the decimal point is closed. This control signal is realized through the 6th pin of the chip processing end; the program burning end plug-in J2 is the program burning end interface of the chip U1, which is used to burn the program to the chip.

[0032] The digital display terminal is widely used in various types of welding equipment of the utility model. Previously, the display of more than 1000 was changed by 2 or 3 digits due to insufficient resolution. Now, whether it is the display of 200 models or 4000 models, it can guarantee an increase of 1 digit resolution. The production cost of the digital display terminal has also been reduced by about 30%, and the supply has been effectively guaranteed.

[0033] like Figure 2 As shown, the chip processing end adopts a control chip U1 of model STC8H4K64TL, the 5th pin of the chip U1 is connected to the signal processing end, the 6th pin of the chip U1 is connected to the decimal point control end, the 7th pin, the 29th pin to the 36th pin, and the 41st pin to the 42nd pin of the chip U1 are all connected to the signal output end; the 15th pin of the chip U1 is connected to the power supply and signal input end, the 16th pin of the chip U1 is connected to the reference voltage end, and the 19th pin and the 20th pin of the chip U1 are connected to the program burning end.

[0034] In this embodiment, the domestic chip STC8H4K64TL is used to process the signal through an internal program and convert the 12-bit high-precision data into the corresponding segment code and chip select signal; the input signal is adopted by the internal 12-bit high-precision, the output display is more precise, and the cost is lower.

[0035] The power supply and signal input end adopts a plug-in J1 with model CON:3.96-5. The first pin of the plug-in J1 is connected to the signal processing end, the decimal point control end, the reference voltage end, the program burning end and the 15th pin of the chip U1, and is connected to a 5V power supply. The second pin of the plug-in J1 is connected to the signal processing end. The third and fourth pins of the plug-in J1 are the signal ground and the power supply ground. The fifth pin of the plug-in J1 is connected to the decimal point control end.

[0036] In this embodiment, the power supply and signal input terminal are used to provide DC voltage and signal acquisition. The DC voltage is input through the positive pole of the 1st pin and the negative pole of the 3rd pin of the CON:3.96-5 plug-in J1, and the signal is input through the 2nd pin of the plug-in J1. The 3rd and 4th pins of the plug-in J1 are the signal ground and the power supply ground.

[0037] The signal processing end includes a switch S1, a switch S2, a switch S3, a switch S4, a resistor R 14 , resistor R 15 , resistor R 16 , resistor R 17 , resistor R 18 , resistor R 19 , capacitor C1, capacitor C6, adjustable resistor TS and diode D2; one end of the switch S1, switch S2, switch S3 and switch S4 are all connected to the second pin of the plug-in J1, and the other ends of the switch S1, switch S2, switch S3 and switch S4 are connected to the resistor R one by one. 17 One end of the resistor R 16 One end of the resistor R 15 One end and the resistor R 14 One end of the resistor R 17 The other end, resistor R 16 The other end, resistor R 15 The other end and resistor R 14 The other end is connected to the resistor R 18 One end of the resistor R 18 The other end is connected to one end of capacitor C6, one end of capacitor C1, and resistor R 19 The other end of the capacitor C6 is connected to the ground. The other end of the capacitor C1 is connected to the sliding end of the adjustable resistor TS and is also connected to the ground. 19 The other end of the diode D2 is connected to one end of the adjustable resistor TS, the other end of the adjustable resistor TS is grounded, and the cathode of the diode D2 is connected to the first pin of the plug-in J1.

[0038] In this embodiment, the signal processing end is used to switch the gear of the input signal, filter and calibrate the signal, and send it to the chip. The input signal is switched to different gears through switches S1, S2, S3 and S4, and is sent to the 5th pin of the chip U1 after signal filtering by the post-stage capacitors C1 and C4, calibration by the adjustable resistor TS and signal clamping protection by the diode D2.

[0039] The signal output end adopts LED: a 4-bit chip select common anode digital tube chip U2, and the 1st to 12th pins of the chip U2 are connected one by one with the 32nd pin, 31st pin, 7th pin, 30th pin, 42nd pin, 33rd pin, 29th pin, 34th pin, 35th pin, 41st pin, 18th pin and 36th pin of the chip U1.

[0040] In this embodiment, the signal output terminal is used to output the segment code and chip select signal to the LED: 4-bit chip select common anode digital tube to display the current signal voltage.

[0041] The reference voltage end includes capacitor C4, capacitor C5, capacitor C7, voltage regulator WY1, resistor R9, electrolytic capacitor E1 and diode D1; one end of the capacitor C5 is respectively connected to the reference end and cathode of the voltage regulator WY1, one end of the resistor R9 and the 16th pin of the chip U1, the other end of the capacitor C5 is respectively connected to the anode of the voltage regulator WY1, the negative electrode of the electrolytic capacitor E1, the positive electrode of the diode D1, one end of the capacitor C4 and one end of the capacitor C7, and is grounded, and the other end of the resistor R9 is respectively connected to the positive electrode of the electrolytic capacitor E1, the negative electrode of the diode D1, the other end of the capacitor C4, the other end of the capacitor C7 and the 1st pin of the plug-in J1.

[0042] In this embodiment, the reference voltage terminal is used to provide a stable voltage. The voltage regulator WY1 provides a 2.5V stable voltage as the reference voltage of the input signal, which is input through the 16th pin of the chip U1.

[0043] The decimal point control terminal includes a resistor R 20 , resistor R 21 and grounding capacitor C3; the resistor R 20 One end of the plug-in J1 and the 5th pin of the resistor R 20 One end of the resistor R 20 The other end of the resistor R 21 The other end is connected to the grounding capacitor C3 and the 6th pin of the chip U1 respectively.

[0044] In this embodiment, the decimal point control terminal is used for the 5th pin of the CON:3.96-5 plug-in J1 to control the tens decimal point of the LED:4-bit chip select common anode digital tube. When the 5th pin of J1 is short-circuited with the 4th pin, the tens decimal point lights up; when disconnected, the decimal point is closed.

[0045] The program burning end adopts a plug-in J2 of model PROG:2.54-5, and the plug-in J2 includes pins 1 to 4, a resistor R 22 And the resistor R 23 The first pin of J2 is connected to the first pin of the plug-in J1, and the second pin of J2 is connected to the resistor R 22 One end of the resistor R 22 The other end is connected to the 19th pin of the chip U1, and the 3rd pin of J2 is connected to the resistor R 23 One end of the resistor R 23 The other end of J2 is connected to the 20th pin of the chip U1, and the 4th pin of J2 is grounded.

[0046] In this embodiment, the program burning end is used to burn the program to the chip, and the PROG:2.54-5 plug-in J2 is the program burning end interface of the chip U1.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A digital display terminal, characterized in that: It includes power supply and signal input terminal, signal processing terminal, chip processing terminal, reference voltage terminal, signal output terminal, decimal point control terminal and program burning terminal; The signal processing end, decimal point control end, chip processing end, reference voltage end and program burning end are all connected to the power supply and signal input end, and the signal processing end, decimal point control end, reference voltage end, program burning end and signal output end are all connected to the chip processing end.

2. The digital display terminal according to claim 1, characterized in that: The chip processing end adopts a control chip U1 of model STC8H4K64TL, the 5th pin of the chip U1 is connected to the signal processing end, the 6th pin of the chip U1 is connected to the decimal point control end, the 7th pin, the 29th pin to the 36th pin, and the 41st pin to the 42nd pin of the chip U1 are all connected to the signal output end; the 15th pin of the chip U1 is connected to the power supply and signal input end, the 16th pin of the chip U1 is connected to the reference voltage end, and the 19th pin and the 20th pin of the chip U1 are connected to the program burning end.

3. The digital display terminal according to claim 2, characterized in that: The power supply and signal input end adopts a plug-in J1 with model CON:3.96-5. The first pin of the plug-in J1 is connected to the signal processing end, the decimal point control end, the reference voltage end, the program burning end and the 15th pin of the chip U1, and is connected to a 5V power supply. The second pin of the plug-in J1 is connected to the signal processing end. The third and fourth pins of the plug-in J1 are the signal ground and the power supply ground. The fifth pin of the plug-in J1 is connected to the decimal point control end.

4. The digital display terminal according to claim 3, characterized in that: The signal processing end includes a switch S1, a switch S2, a switch S3, a switch S4, a resistor R 14 , resistor R 15 , resistor R 16 , resistor R 17 , resistor R 18 , resistor R 19 , capacitor C1, capacitor C6, adjustable resistor TS and diode D2; One end of the switch S1, the switch S2, the switch S3 and the switch S4 are connected to the second pin of the plug-in J1, and the other ends of the switch S1, the switch S2, the switch S3 and the switch S4 are connected to the resistor R 17 One end of the resistor R 16 One end of the resistor R 15 One end and the resistor R 14 One end of the resistor R 17 The other end, resistor R 16 The other end, resistor R 15 The other end and resistor R 14 The other end is connected to the resistor R 18 One end of the resistor R 18 The other end is connected to one end of capacitor C6, one end of capacitor C1, and resistor R 19 The other end of the capacitor C6 is connected to the ground. The other end of the capacitor C1 is connected to the sliding end of the adjustable resistor TS and is also connected to the ground. 19 The other end of the diode D2 is connected to one end of the adjustable resistor TS, the other end of the adjustable resistor TS is grounded, and the cathode of the diode D2 is connected to the first pin of the plug-in J1.

5. The digital display terminal according to claim 4, characterized in that: The signal output end adopts LED: a 4-bit chip select common anode digital tube chip U2, and the 1st to 12th pins of the chip U2 are connected one by one with the 32nd pin, 31st pin, 7th pin, 30th pin, 42nd pin, 33rd pin, 29th pin, 34th pin, 35th pin, 41st pin, 18th pin and 36th pin of the chip U1.

6. The digital display terminal according to claim 5, characterized in that: The reference voltage terminal includes capacitor C4, capacitor C5, capacitor C7, voltage stabilizer WY1, resistor R9, electrolytic capacitor E1 and diode D1; One end of the capacitor C5 is respectively connected to the reference end and cathode of the voltage regulator WY1, one end of the resistor R9 and the 16th pin of the chip U1, the other end of the capacitor C5 is respectively connected to the anode of the voltage regulator WY1, the cathode of the electrolytic capacitor E1, the anode of the diode D1, one end of the capacitor C4 and one end of the capacitor C7, and is grounded, and the other end of the resistor R9 is respectively connected to the anode of the electrolytic capacitor E1, the cathode of the diode D1, the other end of the capacitor C4, the other end of the capacitor C7 and the 1st pin of the plug-in J1.

7. The digital display terminal according to claim 6, characterized in that: The decimal point control terminal includes a resistor R 20 , resistor R 21 and grounding capacitor C3; The resistor R 20 One end of the plug-in J1 and the 5th pin of the resistor R 20 One end of the resistor R 20 The other end of the resistor R 21 The other end is connected to the grounding capacitor C3 and the 6th pin of the chip U1 respectively.

8. The digital display terminal according to claim 7, characterized in that: The program burning end adopts a plug-in J2 of model PROG:2.54-5, and the plug-in J2 includes pins 1 to 4, a resistor R 22 And the resistor R 23 The first pin of J2 is connected to the first pin of the plug-in J1, and the second pin of J2 is connected to the resistor R 22 One end of the resistor R 22 The other end is connected to the 19th pin of the chip U1, and the 3rd pin of J2 is connected to the resistor R 23 One end of the resistor R 23 The other end of J2 is connected to the 20th pin of the chip U1, and the 4th pin of J2 is grounded.

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