CN208091558U - Electronic scale system - Google Patents

Abstract

The utility model provides a kind of electronic scale system, including weighing sensor, amplifying circuit, A/D conversion circuits, single chip circuit, display circuit, voltage-stabilized power supply circuit, wherein, the weighing sensor is used to weigh and export the weight analog signal of object being measured；The amplifying circuit is for the weight analog signal to be amplified；The A/D conversion circuits are used to amplified weight analog signal progress A/D being converted to weight figure signal；The single chip circuit is persistently swept reading to the weight figure signal of input and weighing result stores；The display circuit is for showing the weighing result；The voltage-stabilized power supply circuit is used to power for the single chip circuit and amplifying circuit.The circuit structure of electronic scale system provided by the utility model is simple, and cost is relatively low, feature-rich, easy to operate, can preferably meet the needs of significant market to weighing and valuating automatically.

Description

Electronic scale system

Technical field

The utility model is related to electronic component technology field, more particularly to a kind of electronic scale system.

Background technology

Now, due to the accurate measurement of electronic scale system, quick and convenient, it has not only been dissolved into each of life Corner, demand of the people to the electronic scale system of various performances are even more increasing.

The circuit measuring system structure of existing electronic scale system is complicated, and cost is higher, therefore, it is necessary to develop a thin The simple electronic scale system of section structure, meets the needs of significant market to weighing and valuating automatically.

Utility model content

The purpose of this utility model is to provide a kind of electronic scale systems, and the circuit to solve existing electronic scale system is surveyed It is complicated to measure system structure, the higher problem of cost.

To achieve the above object, the utility model provides a kind of electronic scale system, including weighing sensor, amplification electricity Road, A/D conversion circuits, single chip circuit, LED display circuit or LCD display module, voltage-stabilized power supply circuit, wherein described to weigh Sensor is set on weighting platform scale body, the weight analog signal for weighing and exporting object being measured；The amplifying circuit is used for The weight analog signal is amplified；The A/D conversion circuits are used to amplified weight analog signal carrying out A/D to turn Get weight figure signal in return；The single chip circuit is persistently swept reading and weighing to the weight figure signal of input As a result it is stored；The LED display circuit or LCD display module are for showing the weighing result；The regulated power supply electricity Road is used to power for the single chip circuit and amplifying circuit.

Preferably, further including information acquisition module and keyboard input circuit, described information acquisition module is tested for obtaining The pricing information of object is measured, the keyboard input circuit is used to input the mark of object being measured or selects the mark of object being measured Know, at this point, the single chip circuit is calculated according to the weighing result and with the matched pricing information of mark The total price of object being measured, and carry out by the display circuit showing the total price.

Preferably, further including clock chip, for providing clock reference signal for the single chip circuit.

Preferably, further including warning circuit, for beyond maximum range and alarming in the weighing result.

Preferably, the weighing sensor is resistance strain type sensor.

Preferably, the single chip circuit includes the STC89C52RC minimum systems that STC89C52RC and peripheral circuit are constituted Circuit.

Preferably, the single chip circuit includes the STC89C52RC minimum systems that STC89C52RC and peripheral circuit are constituted Circuit, the STC89C52RC minimum systems circuit include STC89C52RC chips and the clock circuit being attached thereto and reset electric Road.

Preferably, the clock circuit is internal type clock circuit or external mode clock circuit, the reset circuit For external key manual reset circuit.

The circuit structure of electronic scale system provided by the utility model is simple, and cost is relatively low, feature-rich, easy to operate, Can preferably meet the needs of significant market to weighing and valuating automatically.

Description of the drawings

Fig. 1 is the circuit composition schematic diagram of the preferred embodiment in the utility model one；

Fig. 2 is the circuit composition schematic diagram of the preferred embodiment in the utility model two；

Fig. 3 is the circuit composition schematic diagram of the preferred embodiment in the utility model three；

Fig. 4 is STC89C52RC minimum system circuit diagrams；

Fig. 5 is internal type clock circuit；

Fig. 6 is external mode clock circuit；

Fig. 7 is button manual reset circuit；

Fig. 8 is data acquisition module circuit diagram；

Fig. 9 is LED display circuit figure；

Figure 10 is voltage-stabilized power supply circuit.

Specific implementation mode

Below with reference to the attached drawing of the utility model, the technical scheme in the embodiment of the utility model is carried out clear, complete Whole description and discussion, it is clear that as described herein is only a part of example of the utility model, is not whole reality Example is based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work The every other embodiment obtained, belongs to the scope of protection of the utility model.

For the ease of the understanding to the utility model embodiment, make into one by taking specific embodiment as an example below in conjunction with attached drawing The explanation of step, and each embodiment does not constitute the restriction to the utility model embodiment.

Embodiment one：

As shown in Figure 1, a kind of electronic scale system is present embodiments provided, including weighing sensor 10, amplifying circuit 20, A/ D conversion circuits 30, single chip circuit 40, LED display circuit 50, voltage-stabilized power supply circuit 60, wherein weighing sensor 10, which is set to, to be claimed On platform balance body, the weight analog signal for weighing and exporting object being measured；Amplifying circuit 20 is for simulating the weight Signal is amplified；A/D conversion circuits 30 are used to amplified weight analog signal progress A/D being converted to weight figure letter Number；Single chip circuit 40 is persistently swept reading to the weight figure signal of input and weighing result stores；LED display electricity Road 50 is for showing the weighing result；Voltage-stabilized power supply circuit 60 is used to power for the single chip circuit and amplifying circuit.

Wherein, the weighing sensor 10 in the present embodiment is resistance strain type sensor.Weighing sensor 10 is by non-electrical The substance of amount (quality or weight) becomes the conversion element of electricity, is also both used by the transformation of supporting force or other forms To measure the signal of evaluation.

In addition, the single chip circuit 40 in the present embodiment includes the STC89C52RC that STC89C52RC and peripheral circuit are constituted Minimum system circuit.

LED display circuit in the present embodiment is LED display module, and LED display is made of light emitting diode arrangement A display device, have：Little power consumption, service life are long, at low cost, brightness is high, failure is few, visual angle is big, visual range is remote etc. Advantage so that the electronic scale is to be suitable for the application scenarios such as family kitchen, parts count.In other preferred embodiments, this is aobvious Show that circuit may be replaced by LCD display module.The present embodiment by using numeral method Digital Implementation weight of object It has been shown that, such electronic scale system so that the part of hardware very simplifies, and the circuit of interface is also easy to implement, and significantly Reduce programming time.

The operation principle of the electronic scale system is as follows：Object being measured is placed on weighing platform (electronic scale generally comprise load-bearing, Power transmission reset system, generally by carrier, limit damper mechanism, receive weighed object load scale bridge structure and hanging connect The compositions such as relay part, also known as the scale body of electronic scale, it refers to the power transmission and machinery between the conversion element and object claimed A kind of reset system), then generate a weight, passed to scale body as carrier on weighing sensor 10, to pass through biography Sensor has electromechanical effect, and weight of object is converted into having certain function with the weight of this article by a series of process The electric signal (namely weight analog signal) of relationship.Obtained weight analog signal is amplified by amplifying circuit 20, so It is filtered afterwards, then carries out a series of conversion by A/D conversion circuits 30, weight figure signal will be obtained, then lead to The microprocessor for crossing single chip circuit 40 is handled, microprocessor it is lasting sweep reading, and by the switch of different functions its Different states judges, result, which is finally reached internal memory, is stored that (memory here can be microcontroller Storage chip inside circuit or the SAM Stand Alone Memory being connected with single chip circuit), until needing, by being transmitted to microcontroller Instruction, then microcontroller is that controllable transfer data on display circuit is shown.

STC89C52RC used by the present embodiment has the characteristics that low-power consumption, rate height, strong interference immunity, STC89C52RC minimum system circuit diagrams are as shown in Figure 4.

The clock circuit and reset circuit of used STC89C52RC minimum systems are once introduced below.

Clock circuit：The pin XTAL2 and XTAL1 of STC89C52RC are the output end and input terminal of this amplifier respectively, It is internal that there are one the high gain inverting amplifiers for being used for constituting oscillator.Internal type clock circuit is as shown in figure 5, XTAL2 connects Internal oscillator, XTAL1 ground connection.For external oscillator signal, without particular/special requirement, pulse width can be ensured by only requiring, The general square-wave signal for being less than 12MHz using frequency, clock can be generated by external mode or internal type generates.External mode Clock circuit is as shown in fig. 6, timing element generally uses the antiresonant circuit that capacitance and quartz crystal form.TAL1 with The pin of XTAL2 connects element, then oscillator being capable of self-oscillation.The size of capacitance can play fine tuning to frequency Effect, capacitance can be between 5~30pF, and crystal oscillation frequency can select between 1.2~12MHz.

Reset circuit：The external reset circuit of microcontroller, which powers on, to automatically reset and button hand-reset two ways, this In using button hand-reset, reset circuit is as shown in Figure 7.After pressing reset key, reset terminal passes through resistance and VCC power supplys It connects.Can reset circuit be related to a system and reliably work, the reset electricity being made of Resistor-Capacitor Unit and gate circuit Road in most cases can good work, but the reset trigger thresholding of rc reset circuit it is more difficult design when with regard to true Fixed, this and resistance, capacitance, power supply etc. are related, and it is also larger to be acted upon by temperature changes.So if it find that design is answered When position circuit does not work, the size of resistance, capacitance can be suitably adjusted.

As shown in figure 8, including sensing in concrete application example, in complete data acquisition module circuit diagram, amplifying and turn Change circuit.Wherein, resistance strain type sensor R13 carries out the acquisition of simulation weight signal, amplifying circuit and A/D conversion circuits Chip uses HX711.

As shown in figure 9, LED display circuit includes 4 light-emitting diode displays, 4 light-emitting diode displays have the route selection of 8*4 root segments and 4 The route selection of root position.The connection method of section route selection and position route selection is also not quite similar, and position selector control shows bright, dark, the section route selection control of position The selection of character processed.Light-emitting diode display has Dynamic Announce and the two different modes of static status display.Here LED Dynamic Announces are used Mode.When Multi-bit LED is shown, all section route selections are connected in parallel, cost can be reduced, simplify circuit, by one 8 The control of I/O mouthfuls of position, and common anode pole is controlled by the I/O mouth lines responded respectively.

In this electronic scale system, the power supply power supply of microcontroller needs+5V, amplification circuits are also required to ± 5V power supplys, institute Must have a kind of regulator circuit, the fixed voltage-stablizer in tri- ends ± 5V constituted herein by 7805, voltage-stabilized power supply circuit is as schemed Shown in 10.The characteristics of circuit is can to share a set of current rectifying and wave filtering circuit, is not connected to publicly with power supply due to loading, needs to increase Diode VD is added to shield.

Embodiment two：

Outside the present embodiment divided by lower part, rest part is identical as embodiment one, specific as follows：

As shown in Fig. 2, a kind of electronic scale system is present embodiments provided, including weighing sensor 10, amplifying circuit 20, A/ D conversion circuits 30, single chip circuit 40, LED display circuit 50, voltage-stabilized power supply circuit 60, in addition, the electronic scale system further includes Information acquisition module 70 and keyboard input circuit 80, described information acquisition module are used to obtain the pricing information of object being measured, The keyboard input circuit is used to input the mark of object being measured or selects the mark of object being measured, at this point, the monolithic Electromechanical road carries out the total price that object being measured is calculated according to the weighing result and with the matched pricing information of mark, And it carries out showing the total price by the display circuit.

The present embodiment is by being extended embodiment one, such as the input unit and information acquisition module of keyboard so that Electronic scale may be implemented to weigh the function of valuation.

Embodiment three：

Outside the present embodiment divided by lower part, rest part is identical as embodiment one, specific as follows：

As shown in figure 3, a kind of electronic scale system is present embodiments provided, including weighing sensor 10, amplifying circuit 20, A/ D conversion circuits 30, single chip circuit 40, LCD display circuit 31, voltage-stabilized power supply circuit 60, keyboard input circuit 80, in addition, should Electronic scale system further includes clock chip 32, for providing clock reference signal for single chip circuit.In addition, the electronic scale system Further include warning circuit 33, for beyond maximum range and alarming in weighing result.

The electronic scale of the present embodiment uses LCD display circuit (module), the ability that not only people exchanges with machine to obtain centainly The reinforcement of degree, while the display of shopping list, the display of weighed object information can be realized by LCD display, more fill it up with The diversified use demand of foot.

Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to In this, any those skilled in the art within the technical scope disclosed by the utility model, the deformation that the utility model is done Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with described Subject to scope of the claims.

Claims (7)

1. a kind of electronic scale system, which is characterized in that electromechanical including weighing sensor, amplifying circuit, A/D conversion circuits, monolithic Road, LED display circuit or LCD display module, voltage-stabilized power supply circuit, wherein the weighing sensor is set on weighting platform scale body, is used In the weight analog signal for weighing and exporting object being measured；The amplifying circuit is for putting the weight analog signal Greatly；The A/D conversion circuits are used to amplified weight analog signal progress A/D being converted to weight figure signal；It is described Single chip circuit is persistently swept reading to the weight figure signal of input and weighing result stores；The LED is aobvious Show circuit or LCD display module for showing the weighing result；The voltage-stabilized power supply circuit is used to be the single chip circuit And amplifying circuit power supply.

2. electronic scale system according to claim 1, which is characterized in that further include information acquisition module and keyboard input electricity Road, described information acquisition module are used to obtain the pricing information of object being measured, and the keyboard input circuit is tested for inputting Measure object mark or select object being measured mark, at this point, the single chip circuit according to the weighing result and with institute It states the matched pricing information of mark and carries out the total price that object being measured is calculated, and display institute is carried out by the display circuit State total price.

3. electronic scale system according to claim 1, which is characterized in that further include clock chip, for being the monolithic Electromechanical road provides clock reference signal.

4. electronic scale system according to claim 1, which is characterized in that further include warning circuit, in the weighing As a result exceed maximum range and alarm.

5. electronic scale system according to claim 1, which is characterized in that the weighing sensor senses for resistance-strain type Device.

6. electronic scale system according to claim 1, which is characterized in that the single chip circuit include STC89C52RC and The STC89C52RC minimum system circuits that peripheral circuit is constituted, the STC89C52RC minimum systems circuit includes STC89C52RC Chip and the clock circuit and reset circuit being attached thereto.

7. electronic scale system according to claim 6, which is characterized in that the clock circuit is internal type clock circuit Or external mode clock circuit, the reset circuit are external key manual reset circuit.