CN203705037U - Electronic scale - Google Patents

Abstract

The utility model relates to an electronic scale. The electronic scale comprises a pedestal and a weighing apparatus arranged in the pedestal. The weighing apparatus comprises a weight sensor, a touch chip, a display circuit, a power supply circuit and a master control chip. E+, S+, S- and E- pins of the weight sensor are connected to AVE+, AI1+ and AI1- pins of the master control chip and ground respectively. P11/CM0N1, P14/CM0N4, P50/SCK/SCL and P00/INT0/CM0O pins of the touch chip are connected to an ON/OFF touch electrode, a TIME touch electrode, a P0.1/INT1 pin used for a switch and a P0.7 pin used for timing of the master control chip respectively. COM0-COM3 and SEG0-SEG21 pins of the display circuit are connected with COM0-COM3 and SEG0-SEG21 pins of the master control chip respectively. An output terminal of the power supply circuit is connected with a VDD pin of the touch chip and AVDD and DVDD pins of the master control chip respectively. Through a touch button, the electronic scale possesses an ultrafast response speed and weighing can be accurate to 0.1 gram. Simultaneously, a timing function is possessed. A coffee powder weight can be accurately measured and coffee powder brewing time can be monitored. A cell can be installed and a power supply can be externally connected. Two kinds of power supply functions are possessed.

Description

Electronic scale

Technical field

The utility model relates to a kind of electronic scale.

Background technology

At present, most of electronic scales are to be all made up of pressure transducer, amplifier, signal converter, display and microprocessor, and it shows after the data that measure being sent to microprocessor processes by amplifier and signal converter by pressure transducer on display again.This electronic scale can only be realized general function of weighing, function singleness, and exist weigh precisely, reaction velocity is slow, defect that cannot timing, weighing up after coffee powder weight, brew with boiling water, long or the too short taste that all can affect coffee of brewing time of coffee, therefore needs stopwatch to add up the time brewing, complex operation, in addition, can be without early warning automatic shutdown when operation, impact is normally used, inefficiency.

Utility model content

The utility model has overcome the deficiencies in the prior art, provides a kind of and weighs precisely, reaction velocity is fast, the electronic scale of Timing.

For achieving the above object, the technical solution adopted in the utility model is: a kind of electronic scale, comprise pedestal, be located at the weighing device in described pedestal, described weighing device comprises weight sensor, touch chip, display circuit, power circuit and main control chip, the E+ of described weight sensor, S+, S-, E-pin respectively with the AVE of described main control chip+, AI1+, AI1-pin, ground is connected, the P11/CM0N1 of described touch chip, P14/CM0N4, P50/SCK/SCL, P00/INT0/CM0O pin respectively with ON/OFF touch electrode, TIME touch electrode, the P0.1/INT1 pin for switch of described main control chip, P0.7 pin for timing is connected, the COM0-COM3 of described display circuit, SEG0-SEG21 pin respectively with the COM0-COM3 of described main control chip, SEG0-SEG21 pin is connected, the output terminal of described power circuit respectively with the VDD pin of described touch chip, the AVDD of described main control chip, DVDD pin is connected.

In preferred embodiment of the utility model, P10/CM0N0, P12/CM0N2, P51/SI/SDA, the P01/LPW0 pin that electronic scale further comprises described touch chip respectively with ZERO touch electrode, MODE touch electrode, described main control chip for the P0.6 pin of zero clearing, be connected for the P0.0/INT0 pin of Conversion of measurement unit.

In preferred embodiment of the utility model, electronic scale further comprises that described power circuit comprises diode D1, capacitor C 1, voltage stabilizing chip U1 and electrochemical capacitor C24, capacitor C 2 and capacitor C 3, one end of described capacitor C 1 is connected to the ground, the other end is connected with the negative pole of described diode D1, the input end Vin of voltage stabilizing chip U1 respectively, and described electrochemical capacitor C24, capacitor C 2 and capacitor C 3 are all connected in parallel between the output end vo ut and ground of described voltage stabilizing chip U1.

In preferred embodiment of the utility model, electronic scale further comprises that the P2.0/LXIN, P2.1/LXOUT pin of described main control chip are respectively through capacitor C 17, capacitor C 16 ground connection, and is connected with crystal oscillator Y1 between described P2.0/LXIN pin and described P2.1/LXOUT pin.

In preferred embodiment of the utility model, electronic scale further comprises that the upper end of described pedestal is connected with loading plate by support bar.

In preferred embodiment of the utility model, electronic scale further comprises that the bottom of described pedestal is provided with leg.

The utility model has solved the defect existing in background technology, the utility model passes through touch-key, there is ultrafast response speed, 1 millisecond can start work, full voltage transformer, from 100V-240V, weighing can be precisely to 0.1 gram, there is unit conversion functions, be convenient to the use of different regions, there is clocking capability simultaneously, can accurately measure the weight of coffee powder and the time that monitoring coffee powder brews, help people better to control coffee, the ratio of water and drinking the time, guarantee better mouthfeel and quality, convenient and swift, weight and time all show screen display at one, intuitive and convenient, battery both can be installed, also can external power supply, dual power supply function, increase foot pad and can prevent the water stain infringement of desktop, increase the service life, " no " automatic shut-off function avoids operation time without early warning automatic shutdown, working stability is reliable.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is the stereographic map of preferred embodiment of the present utility model;

Fig. 2 is the side view of preferred embodiment of the present utility model;

Fig. 3 is the circuit diagram of preferred embodiment of the present utility model;

In figure: 2, pedestal, 4, weight sensor, 6, touch chip, 8, display circuit, 10, power circuit, 12, main control chip, 14, ON/OFF touch electrode, 16, TIME touch electrode, 18, ZERO touch electrode, 20, MODE touch electrode, 22, support bar, 24, loading plate, 26, leg.

Embodiment

In conjunction with the accompanying drawings and embodiments the utility model is described in further detail now, these accompanying drawings are the schematic diagram of simplification, and basic structure of the present utility model is only described in a schematic way, and therefore it only shows the formation relevant with the utility model.

As Fig. 1, shown in Fig. 3, a kind of electronic scale, comprises pedestal 2, be located at the weighing device in pedestal 2, weighing device comprises weight sensor 4, touch chip 6, display circuit 8, power circuit 10 and main control chip 12, the E+ of weight sensor 4, S+, S-, E-pin respectively with the AVE of main control chip 12+, AI1+, AI1-pin, ground is connected, and E+ represents to encourage anode, and S+ represents output signal anode, and S-represents output signal negative terminal, and E-represents to encourage negative terminal, can precisely arrive 0.1g, touches the P11/CM0N1 of chip 6, P14/CM0N4, P50/SCK/SCL, P00/INT0/CM0O pin respectively with ON/OFF touch electrode 14, TIME touch electrode 16, the P0.1/INT1 pin for switch of described main control chip, P0.7 pin for timing is connected, and hand touching ON/OFF touch electrode 14 starts work or quit work, and hand touching TIME touch electrode 16 can be realized timing, and touch electrode has ultrafast response speed, the COM0-COM3 of display circuit 8, SEG0-SEG21 pin respectively with the COM0-COM3 of main control chip 12, SEG0-SEG21 pin is connected, and preferably display circuit 8 adopts lattice lcd modular LCD, can show weight and time simultaneously, visual and clear, the output terminal of power circuit 10 respectively with the VDD pin that touches chip 6, the AVDD of main control chip 12, DVDD pin is connected.The model that preferably touches chip 6 is SN8P25231S, and preferably the model of main control chip 12 is SN8P2949.

The utility model preferably touches the P10/CM0N0 of chip 6, P12/CM0N2, P51/SI/SDA, P01/LPW0 pin respectively with ZERO touch electrode 18, MODE touch electrode 20, the P0.6 pin for zero clearing of main control chip 12, P0.0/INT0 pin for Conversion of measurement unit is connected, hand touching ZERO touch electrode 18, can realize zero clearing, be convenient to consecutive weighings, hand touching MODE touch electrode 20, can realize the conversion of unit of weight, such as the conversion between g and oz, or conversion between g and lb, wherein oz represents ounce, lb represents pound, be convenient to the use of different regions, usable range is wide.

Power circuit 10 comprises diode D1, capacitor C 1, voltage stabilizing chip U1 and electrochemical capacitor C24, capacitor C 2 and capacitor C 3, one end of capacitor C 1 is connected to the ground, the other end is connected with the negative pole of diode D1, the input end Vin of voltage stabilizing chip U1 respectively, and electrochemical capacitor C24, capacitor C 2 and capacitor C 3 are all connected in parallel between the output end vo ut and ground of voltage stabilizing chip U1.Preferably the model of voltage stabilizing chip U1 is HT7130, be connected to+4.5V battery BAT between the positive pole of diode D1 and ground, and diode D1 conducting, after voltage stabilizing chip U1 burning voltage, then carries out filtering through electrochemical capacitor C24, capacitor C 2 and capacitor C 3; When the negative pole of diode D1 is connected with external power supply DC5V, diode D1 cut-off, after capacitor C 1 filtering, voltage stabilizing chip U1 burning voltage, then carries out filtering through electrochemical capacitor C24, capacitor C 2 and capacitor C 3.Both can connect battery, also can connect external power supply, dual power supply function, convenient and swift.

The P2.0/LXIN of main control chip 12, P2.1/LXOUT pin be respectively through capacitor C 17, capacitor C 16 ground connection, and be connected with crystal oscillator Y1 between P2.0/LXIN pin and P2.1/LXOUT pin.

As shown in Figure 2, the upper end of the preferred pedestal 2 of the utility model is connected with loading plate 24 by support bar 22, avoids object to be directly placed on pedestal 2, extends the serviceable life of pedestal 2.

For fear of the water stain damage to circuit, preferably the bottom of pedestal 2 is provided with leg 26.

The utility model in use, container is placed on loading plate 16, hand is laid a finger on touch electrode ON/OFF, send a signal to and touch chip 6, touch chip 6 signal is passed to main control chip 12, electronic scale work, in container, pour coffee powder into, pressure is applied to weight sensor 4, there is deformation in this weight sensor 4, thereby impedance is changed, make driving voltage change simultaneously, the simulating signal of a variation of output, this simulating signal converts the digital signal of being convenient to processing to after main control chip 12 amplifies, and process, show weight by display circuit 8, then in container, pour boiling water into, coffee is brewed, hand is laid a finger on touch electrode TIME, send a signal to and touch chip 6, touch chip 6 signal is passed to main control chip 12, show brewing time by display circuit 8.

Be enlightenment according to desirable embodiment of the present utility model above, by above-mentioned description, related personnel can, not departing from the scope of this utility model technological thought, carry out various change and modification completely.The technical scope of this utility model is not limited to the content on instructions, must determine technical scope according to claim scope.

Claims (6)

1. an electronic scale, comprise pedestal, be located at the weighing device in described pedestal, described weighing device comprises weight sensor, touch chip, display circuit, power circuit and main control chip, it is characterized in that: the E+ of described weight sensor, S+, S-, E-pin respectively with the AVE of described main control chip+, AI1+, AI1-pin, ground is connected, the P11/CM0N1 of described touch chip, P14/CM0N4, P50/SCK/SCL, P00/INT0/CM0O pin respectively with ON/OFF touch electrode, TIME touch electrode, the P0.1/INT1 pin for switch of described main control chip, P0.7 pin for timing is connected, the COM0-COM3 of described display circuit, SEG0-SEG21 pin respectively with the COM0-COM3 of described main control chip, SEG0-SEG21 pin is connected, the output terminal of described power circuit respectively with the VDD pin of described touch chip, the AVDD of described main control chip, DVDD pin is connected.

2. electronic scale according to claim 1, is characterized in that: P10/CM0N0, the P12/CM0N2 of described touch chip, P51/SI/SDA, P01/LPW0 pin respectively with ZERO touch electrode, MODE touch electrode, described main control chip for the P0.6 pin of zero clearing, be connected for the P0.0/INT0 pin of Conversion of measurement unit.

3. electronic scale according to claim 1 and 2, it is characterized in that: described power circuit comprises diode D1, capacitor C 1, voltage stabilizing chip U1 and electrochemical capacitor C24, capacitor C 2 and capacitor C 3, one end of described capacitor C 1 is connected to the ground, the other end is connected with the negative pole of described diode D1, the input end Vin of voltage stabilizing chip U1 respectively, and described electrochemical capacitor C24, capacitor C 2 and capacitor C 3 are all connected in parallel between the output end vo ut and ground of described voltage stabilizing chip U1.

4. electronic scale according to claim 1, it is characterized in that: the P2.0/LXIN of described main control chip, P2.1/LXOUT pin be respectively through capacitor C 17, capacitor C 16 ground connection, and be connected with crystal oscillator Y1 between described P2.0/LXIN pin and described P2.1/LXOUT pin.

5. electronic scale according to claim 1, is characterized in that: the upper end of described pedestal is connected with loading plate by support bar.

6. electronic scale according to claim 1 or 5, is characterized in that: the bottom of described pedestal is provided with leg.