CN210862875U

CN210862875U - Weighing instrument box with capacitive touch screen

Info

Publication number: CN210862875U
Application number: CN201922297998.7U
Authority: CN
Inventors: 陈文龙; 邹荣辉; 路俊杰; 毛江
Original assignee: Changzhou Webo Weighing Equipment System Co ltd
Current assignee: Changzhou Webo Weighing Equipment System Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-06-26
Anticipated expiration: 2029-12-19

Abstract

The utility model relates to a take capacitive touch screen's instrument case of weighing, its characterized in that: comprises a touch screen body arranged on an instrument box; the touch screen body is connected with the touch screen control PCB through the flexible circuit board; the touch screen control PCB is electrically connected with the instrument control panel through a USB data line; and a common voltage end of a power driving circuit of the touch screen, a power end of the analog circuit and a negative power input pin are respectively connected to a wiring terminal of the touch screen. The utility model discloses measured data directly exports linear current voltage input module, inserts the enterprising line show of measured data access display screen through linear current voltage input module, and the intuition is strong.

Description

Weighing instrument box with capacitive touch screen

Technical Field

The utility model relates to a material technical field that weighs, in particular to take instrument box of weighing of capacitive touch screen.

Background

The weighing circuit of the existing weighing instrument box comprises a plurality of weighing sensors and a weighing instrument, wherein each weighing sensor is provided with an output signal positive end, an output signal negative end, an excitation positive end, an excitation negative end and a shielding end, and the weighing instrument is provided with a signal input interface corresponding to the weighing sensor. The existing weighing circuit is only to simply combine and connect the positive end of an output signal to the positive end SIG + of an input signal of a weighing instrument, and the negative end of the output signal, the positive end of an excitation, the negative end of the excitation and the shielding end of each weighing sensor are respectively connected to corresponding input interfaces of the weighing instrument. The signal stability of the weighing circuit is easily interfered by the outside, especially when the load changes, the signal of the sensor is distorted, and the measurement precision is naturally reduced.

Disclosure of Invention

The utility model aims at overcoming the defect that prior art exists, providing a simple structure, reasonable in design, convenient operation's instrument case of weighing with electric capacity formula touch-sensitive screen.

Realize the utility model discloses the technical scheme of purpose is: a weighing instrument box with a capacitive touch screen comprises a touch screen body; the touch screen body is connected with the touch screen control PCB through the flexible circuit board; the touch screen control PCB is electrically connected with the instrument control panel through a USB data line; a common voltage end of a power driving circuit of the touch screen, a power end of an analog circuit and a negative power input pin are respectively connected to a wiring terminal of the touch screen; capacitors C9 and C11 which are connected in parallel are connected between the common voltage end VCOM and an analog circuit power supply end AVDD; the analog circuit power supply end AVDD is connected with capacitors C13 and C14 and a resistor R10 which are arranged in parallel through a resistor R5, and is connected with an emitting electrode of the triode Q2; the base electrode of the triode Q2 is grounded through a diode D5 and a diode D71, and the collector electrode of the triode Q2 is grounded through a resistor R3 and a capacitor C10; meanwhile, the collector is connected with capacitors C17, C19, C18 and a resistor R11 which are connected in parallel; the negative power supply input pin VGL is connected with an emitting electrode of the triode Q1; an emitter of the triode Q1 is grounded through a resistor R4, capacitors C6 and C4 which are connected in parallel, a base is grounded through a capacitor C7, a resistor R1 is connected between the base and a collector, and the collector is connected with a protection circuit consisting of a patch Schottky diode D1 and a patch Schottky diode D4; the patch Schottky diodes D1 and D4 are respectively connected with a power supply chip U1; the input end of the power chip U1 is grounded through the parallel capacitors C15 and C16, the input end is connected with VCC5V, the enable end is grounded through a resistor R9, and the enable end is connected with the PWRRGTON end through a resistor R6.

The touch screen control PCB board comprises a microcontroller U4 and a USB-to-serial port line circuit; and a USB input/output port of the microcontroller U4 is connected with a USB input/output port of the USB-to-serial port line circuit.

In the technical scheme, the power supply end AVDD of the analog circuit is connected with the output end of the linear current-voltage input circuit.

After the technical scheme is adopted, the utility model discloses following positive effect has:

(1) the utility model discloses measured data directly exports linear current voltage input module, inserts the enterprising line show of measured data access display screen through linear current voltage input module, and the intuition is strong.

(2) The touch screen control PCB board of the utility model comprises a microcontroller U4 and a USB-to-serial port line circuit; the touch screen can be connected by using a USB data line.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

FIG. 1 is a schematic block diagram of the present invention;

fig. 2 is a power driving circuit diagram of the touch panel of the present invention;

FIG. 3 is a circuit diagram of the USB to serial port of the present invention;

fig. 4 is a schematic diagram of a microcontroller according to the present invention;

fig. 5 is a schematic view of the connector of the present invention.

Detailed Description

Referring to fig. 1 to 5, the present invention includes a touch screen body; the touch screen body is connected with the touch screen control PCB through the flexible circuit board; the touch screen control PCB is electrically connected with the instrument control panel through a USB data line; a common voltage end of a power driving circuit of the touch screen, a power end of an analog circuit and a negative power input pin are respectively connected to a wiring terminal of the touch screen; capacitors C9 and C11 connected in parallel are connected between the common voltage terminal VCOM and an analog circuit power supply terminal AVDD; the analog circuit power supply end AVDD is connected with capacitors C13 and C14 and a resistor R10 which are arranged in parallel through a resistor R5, and is connected with an emitting electrode of the triode Q2; the base electrode of the triode Q2 is grounded through a diode D5 and a diode D71, and the collector electrode is grounded through a resistor R3 and a capacitor C10; meanwhile, the collector is connected with capacitors C17, C19, C18 and a resistor R11 which are connected in parallel; the negative power supply input pin VGL is connected with the emitting electrode of the triode Q1; an emitter of the triode Q1 is grounded through a resistor R4, a capacitor C6 and a capacitor C4 which are connected in parallel, a base is grounded through a capacitor C7, a resistor R1 is connected between the base and a collector, and a protection circuit consisting of patch Schottky diodes D1 and D4 is connected to the collector; the patch Schottky diodes D1 and D4 are respectively connected with the power supply chip U1; the input end of the power chip U1 is grounded through the parallel capacitors C15 and C16, while the input end is connected with VCC5V, the enable end is grounded through a resistor R9 and is connected with the PWRRGTON end through a resistor R6. The touch screen control PCB board comprises a microcontroller U4 and a USB-to-serial port line circuit; the USB input/output port of the microcontroller U4 is connected with the USB input/output port of the USB-to-serial port line circuit. The analog circuit power supply terminal AVDD is connected with the output terminal of the linear current-voltage input circuit.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a take instrument box of weighing of capacitive touch screen which characterized in that: comprises a touch screen body arranged on an instrument box; the touch screen body is connected with the touch screen control PCB through the flexible circuit board; the touch screen control PCB is electrically connected with the instrument control panel through a USB data line; a common voltage end of a power driving circuit of the touch screen, a power end of an analog circuit and a negative power input pin are respectively connected to a wiring terminal of the touch screen; capacitors C9 and C11 which are connected in parallel are connected between the common voltage end VCOM and an analog circuit power supply end AVDD; the analog circuit power supply end AVDD is connected with capacitors C13 and C14 and a resistor R10 which are arranged in parallel through a resistor R5, and is connected with an emitting electrode of the triode Q2; the base electrode of the triode Q2 is grounded through a diode D5 and a diode D71, and the collector electrode of the triode Q2 is grounded through a resistor R3 and a capacitor C10; meanwhile, the collector is connected with capacitors C17, C19, C18 and a resistor R11 which are connected in parallel; the negative power supply input pin VGL is connected with an emitting electrode of the triode Q1; an emitter of the triode Q1 is grounded through a resistor R4, capacitors C6 and C4 which are connected in parallel, a base is grounded through a capacitor C7, a resistor R1 is connected between the base and a collector, and the collector is connected with a protection circuit consisting of a patch Schottky diode D1 and a patch Schottky diode D4; the patch Schottky diodes D1 and D4 are respectively connected with a power supply chip U1; the input end of the power chip U1 is grounded through the parallel capacitors C15 and C16, the input end is connected with VCC5V, the enable end is grounded through a resistor R9, and the enable end is connected with the PWRRGTON end through a resistor R6.

2. The weighing instrument box with the capacitive touch screen of claim 1, wherein: the touch screen control PCB comprises a microcontroller U4 and a USB-to-serial port line circuit; and a USB input/output port of the microcontroller U4 is connected with a USB input/output port of the USB-to-serial port line circuit.

3. The weighing instrument box with the capacitive touch screen of claim 1, wherein: the analog circuit power supply end AVDD is connected with the output end of the linear current-voltage input circuit.