CN210774309U

CN210774309U - Electronic scale

Info

Publication number: CN210774309U
Application number: CN201921242549.6U
Authority: CN
Inventors: 朱叶玲
Original assignee: Shenzhen Xudong Technology Co Ltd
Current assignee: Shenzhen Xudong Technology Co Ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-06-16
Anticipated expiration: 2029-08-02

Abstract

The utility model provides an electronic scale, include: chip U1, chip U2, chip U3, chip U4, LED array, chip JP1, chip J1; the chip U2, the chip U3, the chip U4, the chip J1 and the LED array are connected to the chip U1; u3 and U4 are connected together; the model number of the chip U1 is 18MB 86; the model of the chip U2 is H7606; the model of the chip U3 is IQS 622; the model of the chip U4 is CX30X/SOT 23-6. The utility model discloses an infrared sensor detects whether touched in the detection range of this sensor, realizes the switch break-make function with the inside circuit cooperation of electronic scale. Adopt the technical scheme of the utility model the flush mounting plate of switch of electronic scale can make into seamless integration mechanism for even the electronic scale also can stable work under adverse conditions.

Description

Electronic scale

Technical Field

The utility model relates to an electrical apparatus field especially relates to an electronic scale.

Background

The electronic scale is widely used in a vegetable field. The switches of the electronic scales in the prior art are generally of a push-button type or a touch type. The push-button switch is easy to be immersed in water to cause short circuit of an internal circuit and cause failure. The touch electronic scale switch is easy to malfunction under the condition that water, oil or dirt exists on the hand, and the user experience is influenced. For this reason, it is necessary to provide an electronic scale that can operate even in a severe environment.

SUMMERY OF THE UTILITY MODEL

In order to achieve the above purpose, the technical solutions provided in the embodiments of the present application are as follows:

an electronic scale, comprising: chip U1, chip U2, chip U3, chip U4, LED array, chip JP1, chip J1. The chip U2, the chip U3, the chip U4, the chip J1 and the LED array are connected to the chip U1. Chip U3 and chip U4 are connected together.

Chip U1 was model 18MB 86. Chip U2 is model number H7606. The model of the chip U3 is IQS 622. The model of the chip U4 is CX30X/SOT 23-6.

When the electronic scale is in operation, the pressure applied to VS, S +, E-, S-of chip JP1 changes, and the excitation voltage changes, and a changing analog signal is output, which is amplified internally by chip U1, A/D converted, and converted into a digital signal. The chip U1 generates a group of digital signals according to the ON/OFF of the key switch and the human body sensed by the chip U3 and sends the digital signals to the chip U4 for operation processing, and outputs a switch reset signal command and a program to output the operation result of the chip U1 to the LED array display.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses an infrared sensor detects whether touched in the detection range of this sensor, realizes the switch break-make function with the inside circuit cooperation of electronic scale. Adopt the technical scheme of the utility model the flush mounting plate of switch of electronic scale can make into seamless integration mechanism for even the electronic scale also can stable work under adverse conditions.

Drawings

FIG. 1 is a schematic block diagram of an electronic scale according to the present invention;

FIG. 2 is an overall circuit diagram of the electronic scale of the present invention;

FIG. 3 is a partial circuit diagram of chips U1 and U2 of the electronic scale of the present invention;

FIG. 4 is a partial circuit diagram of chips U3 and U4 of the electronic scale of the present invention;

fig. 5 is a circuit diagram of an LED array of the electronic scale of the present invention.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

The utility model provides an electronic scale with a better implementation mode. As shown in fig. 1, the electronic scale of the present invention comprises: chip U1, chip U2, chip U3, chip U4, LED array, chip JP1, chip J1. The chip U2, the chip U3, the chip U4, the chip J1 and the LED array are connected to the chip U1. Chip U3 and chip U4 are connected together.

VDD is 1.8-3.3V.

Chip JP1 includes a VS pin, an S + pin, an E-pin, and an S-pin. Chip JP1 is a sensor of an electronic scale.

The chip J1 includes a first lead and a second lead. The second pin of chip J1 is connected to ground.

The chip U1 includes a CAP0 pin, a CAP1 pin, a DGND pin, a VDD pin, a VS pin, an AGND pin, an AIN0 pin, an AIN1 pin, a PT1_3 pin, a PT1_1 pin, a PT1_0 pin, a PT20 pin, a PT21 pin, a PT22 pin, a PT23 pin, a PT24 pin, a PT25 pin, a PT26 pin, a PT27 pin, and a VLED pin. The pin CAP0 and the pin CAP1 are connected together through a capacitor C1. The DGND pin is connected to VDD through a capacitor C2. The VDD pin is connected to VDD. The VS pin is connected to ground through a capacitor C5. The VS pin of chip U1 is also connected to the VS pin of chip JP 1. The AGND pin is connected to ground. The AIN0 pin is connected to the S + pin of chip JP 1. The AIN0 pin is also connected to ground through capacitors C6 and C8 in parallel and a capacitor C7 in series between the AIN0 pin and the AIN1 pin. The AIN1 pin is connected to the S-pin of chip JP 1. The PT20 pin, PT21 pin, PT23 pin through PT27 pin of the chip U1 are connected to the LED array. The VLED pin is connected to ground through capacitors C3 and C4 in parallel. The PT1_0 pin is connected to ground through a keyswitch.

The chip U2 includes an OUT pin, a GND pin, and an IN pin. The OUT pin of the chip U2 is connected to VDD through a capacitor C11 and a capacitor C10 connected in parallel. The GND pin of chip U2 is connected to ground. The IN pin of chip U2 is connected to the second pin of chip J1. The IN pin of chip U2 is also connected to ground through resistors R1 and R2. The IN pin of the chip U2 is also connected to the PT1_3 pin of the chip U1 after passing through the resistor R1. The IN pin of chip U2 is also connected to ground through capacitor C9.

The chip U3 is a human body infrared receiving chip, and generates a group of digital signals when sensing a human body, and sends the digital signals to the chip U4 for operation processing. The chip U3 comprises a CRX1 pin, a CRX0 pin, a VREG pin, a GPIO0 pin, an LED0 pin, an SDA pin, an SCL pin, a VDDII pin and a VSS pin. The SDA pin, the SCL pin, the LED0 pin and the GPIO0 pin of the chip U3 are connected together through a resistor R3, a resistor R4, a resistor R5 and a resistor R6 respectively. The resistor R3, the resistor R4, the resistor R5 and the resistor R6 are connected in parallel to a PT22 pin of the chip U1. The VDDHI pin of chip U3 is connected to ground through capacitor C14. The VREG pin of the chip U3 is connected to the ground through a capacitor C12 and a capacitor C13 which are connected in parallel, and the VSS pin is connected to the ground.

Chip U4 includes RDY pin, GND pin, GPIO pin, SDA pin, VDD pin, SCL pin. The SCL pin, the VDD pin, and the SDA pin of the chip U4 are connected to the SCL pin of the chip U3, the PT22 pin of the chip U1, and the SDA pin, respectively. The VDD pin of chip U4 is also connected to ground through capacitor C15. The GPIO pin of chip U4 is connected to the PT1_1 pin of chip U1.

Wherein, the capacitor adopts 0402 capacitor, and the resistance adopts 0402 resistance.

The working principle of the utility model is as follows: the battery outputs power VDD to an LDO chip U2(H7606) through a filter capacitor C9 to supply power to U1. When an object is placed on the scale, the pressure applied to the transducer JP1(SENS) changes VS, S +, E-, S-and changes the excitation voltage, which outputs a changing analog signal that is internally amplified by U1(18MB86), A/D converted to a digital signal for CPU arithmetic control to U1(18MB 86). The U1(18MB86) generates a group of digital signals to a U4(MCU) for operation processing according to the ON/OFF of a key switch and the human body infrared receiving chip U3(IQS622) when sensing a human body, outputs a switch reset signal command and a program to output the U1(18MB86) operation result to an LED array display (LED33-LED60, LED29-LED 31). The LED array display displays the reading of the electronic scale.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electronic scale, comprising: chip U1, chip U2, chip U3, chip U4, LED array, chip JP1, chip J1; the chip U2, the chip U3, the chip U4, the chip J1 and the LED array are connected to the chip U1; chip U3 and chip U4 are connected together; the model number of the chip U1 is 18MB 86; the model of the chip U2 is H7606; the model of the chip U3 is IQS 622; the model of the chip U4 is CX30X/SOT 23-6.

2. An electronic scale according to claim 1, characterized in that: chip JP1 includes a VS pin, an S + pin, an E-pin, and an S-pin.

3. An electronic scale according to claim 1, characterized in that: the chip J1 comprises a first pin and a second pin; the second pin of chip J1 is connected to ground.

4. An electronic scale according to claim 1, characterized in that: the chip U1 comprises a CAP0 pin, a CAP1 pin, a DGND pin, a VDD pin, a VS pin, an AGND pin, an AIN0 pin, an AIN1 pin, a PT1_3 pin, a PT1_1 pin, a PT1_0 pin, a PT20 pin, a PT21 pin, a PT22 pin, a PT23 pin, a PT24 pin, a PT25 pin, a PT26 pin, a PT27 pin and a VLED pin; the CAP0 pin and the CAP1 pin are connected together through a capacitor C1; the DGND pin is connected to VDD through a capacitor C2; the VDD pin is connected to VDD; the VS pin is connected to ground through a capacitor C5; the VS pin of chip U1 is also connected to the VS pin of chip JP 1; the AGND pin is connected to ground; the AIN0 pin is connected to the S + pin of chip JP 1; the AIN0 pin is also connected to ground through capacitors C6 and C8 in parallel and a capacitor C7 connected in series between the AIN0 pin and the AIN1 pin; AIN1 pin is connected to the S-pin of chip JP 1; the PT20 pin, the PT21 pin, the PT23 pin to the PT27 pin of the chip U1 are connected to the LED array; the VLED pin is connected to ground through capacitors C3 and C4 in parallel; the PT1_0 pin is connected to ground through a keyswitch.

5. An electronic scale according to claim 1, characterized in that: the chip U2 comprises an OUT pin, a GND pin and an IN pin; the OUT pin of the chip U2 is connected to VDD through a capacitor C11 and a capacitor C10 which are connected in parallel; the GND pin of chip U2 is connected to ground; the IN pin of chip U2 is connected to the second pin of chip J1; the IN pin of the chip U2 is also connected to ground through resistors R1 and R2; the IN pin of the chip U2 is connected with the PT1_3 pin of the chip U1 after passing through the resistor R1; the IN pin of chip U2 is also connected to ground through capacitor C9.

6. An electronic scale according to claim 1, characterized in that: the chip U3 is a human body infrared receiving chip, and generates a group of digital signals when sensing a human body and sends the digital signals to the chip U4 for operation processing; the chip U3 comprises a CRX1 pin, a CRX0 pin, a VREG pin, a GPIO0 pin, an LED0 pin, an SDA pin, an SCL pin, an VDDII pin and a VSS pin; the SDA pin, the SCL pin, the LED0 pin and the GPIO0 pin of the chip U3 are connected together through a resistor R3, a resistor R4, a resistor R5 and a resistor R6 respectively; the resistor R3, the resistor R4, the resistor R5 and the resistor R6 are connected in parallel to a PT22 pin of the chip U1; the VDDHI pin of chip U3 is connected to ground through capacitor C14; the VREG pin of the chip U3 is connected to the ground through a capacitor C12 and a capacitor C13 which are connected in parallel, and the VSS pin is connected to the ground.

7. An electronic scale according to claim 1, characterized in that: the chip U4 comprises an RDY pin, a GND pin, a GPIO pin, an SDA pin, a VDD pin and an SCL pin; the SCL pin, the VDD pin and the SDA pin of the chip U4 are respectively connected with the SCL pin of the chip U3, the PT22 pin of the chip U1 and the SDA pin; the VDD pin of chip U4 is also connected to ground through capacitor C15; the GPIO pin of chip U4 is connected to the PT1_1 pin of chip U1.

8. An electronic scale according to any one of claims 1-7, characterized in that: the capacitor adopts 0402 capacitor, and the resistor adopts 0402 resistor.