CN206740228U - Entertaining height and weight scale - Google Patents

Abstract

The utility model discloses an interesting height and weight scale. Composed of four indicator lights, fifth indicator light, power supply, male and female selection buttons, the vertical pole of the scale is fixed vertically on the base of the scale, the pressure sensor module and power supply are installed inside the base of the scale, and the selection button for men and women is installed on the pole of the scale The side of the ultrasonic sensor module is fixed on the top of the vertical pole of the weight scale. The voltage signals output by the pressure sensor module and the ultrasonic sensor module are sent to the minimum system of the single chip microcomputer, and the minimum system of the single chip microcomputer sends the processing results to the first indicator light and the second indicator light. , the third indicator light, the fourth indicator light and the fifth indicator light, the power supply provides electric energy. The utility model uses the LED light to indicate the fatness and thinness of the human body, which increases the interest and practicability of the height and weight scale.

Description

Fun height and weight scale

technical field

The utility model belongs to the field of physical measurement and relates to an interesting height and weight scale.

Background technique

The scale can accurately measure the body's weight, and through the daily weight change, it can reflect the weight control of a certain period of time. The height and weight scale uses ultrasonic technology to measure height (non-touch type), and precision sensors measure weight, which can measure height and weight at the same time. The fat and thin of the human body usually adopts the standard of the World Health Organization, male: (height cm-80)×70﹪=standard weight, female: (height cm-70)×60﹪=standard weight, standard weight plus or minus 10% is normal Weight, plus or minus 10% to 20% of the standard weight is considered overweight or underweight, and plus or minus 20% of the standard weight is considered obese or underweight.

Ultrasonic transducer is an energy conversion device, which can complete the conversion between high-frequency electrical energy and mechanical energy, and convert electrical signals into mechanical vibrations or convert mechanical vibrations into electrical signals by the piezoelectric effect of materials.

Piezoelectric ultrasonic probes use the resonance of piezoelectric crystals to work. When an ultrasonic probe is applied with a pulse signal at its two poles, and its frequency is equal to the natural oscillation frequency of the piezoelectric wafer, the piezoelectric wafer will resonate and drive the resonant plate to vibrate to generate ultrasonic waves. At this time, it is an ultrasonic generator. Conversely, if no voltage is applied between the two electrodes, when the resonant plate receives ultrasonic waves, it will press the piezoelectric chip to vibrate, converting mechanical energy into electrical signals, and then it becomes an ultrasonic receiver.

A pressure sensor is a sensor that senses pressure and converts it into a usable output signal. Pressure sensors are the most commonly used sensors in industrial practice. Generally, the output of ordinary pressure sensors is an analog signal, and an analog signal refers to a signal in which information parameters appear as continuous signals within a given range. Or within a continuous time interval, the characteristic quantity representing information can appear as a signal of any value at any instant.

There are many types of pressure sensors, mainly piezoresistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, resonant pressure sensors, etc. But the most widely used is the piezoresistive pressure sensor, which has extremely low price, high precision and good linearity. The resistance strain gauge is a sensitive device that converts the strain change on the tested object into an electrical signal. It is one of the main components of piezoresistive strain sensors. The most widely used strain gauges are metal resistance strain gauges and semiconductor strain gauges. The resistance value change produced by the strain gauge when it is stressed is usually small. Generally, this strain gauge forms a strain bridge, which is amplified by the subsequent instrument amplifier and then transmitted to the processing circuit (usually A/D conversion and CPU) ) display or actuator.

Single-chip microcomputer, referred to as single-chip microcomputer, is a typical embedded microcontroller (MicrocontrollerUnit). The abbreviation MCU is commonly used to represent single-chip microcomputer. It was first used in the field of industrial control. At present, single-chip microcomputers have penetrated into various fields of our lives, and it is almost difficult to find any field without traces of single-chip microcomputers. The single-chip microcomputer is run by the program and can be modified. Different functions can be realized through different programs. Through the programs, the single-chip microcomputer can conveniently control the lighting speed of LED lamps and digital tubes and the speed of the motor, and can easily generate various random numbers and perform calculations. The high intelligence, high efficiency, and high reliability of the product can be realized through the program.

Contents of the invention

The purpose of the utility model is to design an interesting height and weight scale with simple structure, convenient use, reliable performance and low cost, which can indicate the fatness and thinness of the human body with LED lights.

In order to achieve the above object, the utility model adopts the following technical solutions:

Interesting height and weight scale, composed of scale base, pressure sensor module, scale pole, ultrasonic sensor module, single chip microcomputer minimum system, first indicator light, second indicator light, third indicator light, fourth indicator light, fifth indicator light Composed of light, power supply, male and female selection buttons, the vertical pole of the scale is fixed vertically on the base of the scale, the pressure sensor module and power supply are installed inside the base of the scale, the selection button for men and women is installed on the side of the pole of the scale, and the ultrasonic sensor module is fixed At the top of the vertical pole of the weight scale, the voltage signals output by the pressure sensor module and the ultrasonic sensor module are sent to the minimum system of the single chip microcomputer, and the minimum system of the single chip microcomputer sends the processing results to the first indicator light, the second indicator light, the third indicator light, the third indicator light, and the first indicator light. Four indicator lights and fifth indicator light, the power supply provides electric energy;

The minimum system of the single-chip microcomputer includes a single-chip microcomputer, a pull-up resistor at the P0 port, a clock circuit and a reset circuit. The single-chip microcomputer in the minimum system of the single-chip microcomputer stores the relational expression of the height and weight of men and women inside the single-chip microcomputer, and the minimum system output signal of the single-chip microcomputer controls the first indicator light and the second indicator light. , one of the third indicator light, the fourth indicator light or the fifth indicator light is on;

The power supply is a 5 volt DC power supply, its positive pole is connected to 40 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer, and the negative pole is connected to 20 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer;

One end of the male and female selection button is connected to the negative pole of the power supply, and the other end is connected to the 25 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer;

The pressure sensor module includes a pressure sensor, an amplifier, and an A/D converter. The pressure sensor module is externally connected to 4 pins, which are power supply Vcc, clock SCK, data output DT, and ground GND. These 4 pins are inserted into the pin header The socket is led out with lead wires, in which the power supply Vcc is connected to pin 40 of the microcontroller in the minimum system of the microcontroller, the clock SCK is connected to pin 26 of the microcontroller in the minimum system of the microcontroller, the data output DT is connected to pin 27 of the microcontroller in the minimum system of the microcontroller, and the ground is connected to GND The 20 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer;

The ultrasonic sensor module is externally connected to 4 pins, which are power supply VCC, ground GND, digital signal DO, and analog signal AO. The 28 pins of the microcontroller in the smallest system board, the digital signal DO pins are not connected;

The negative pole of the first indicator light is connected in series with a 470 ohm resistor to the 20 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer, and the positive pole of the first indicator light is connected to the 39 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer;

The negative pole of the second indicator light is connected in series with a 470 ohm resistor to the 20 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer, and the positive pole of the second indicator light is connected to the 38 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer;

The negative electrode of the third indicator light is connected in series with the 20 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer after a 470-ohm resistor is connected in series, and the positive pole of the third indicator light is connected with the 37 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer;

The negative pole of the fourth indicator light is connected to the 20 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer after a 470-ohm resistor is connected in series, and the positive pole of the fourth indicator light is connected to the 36 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer;

The negative electrode of the fifth indicator light is connected in series with a 470 ohm resistor to the 20 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer, and the positive pole of the fifth indicator light is connected to the 35 pins of the single-chip microcomputer in the minimum system of the single-chip microcomputer.

The beneficial effect of the utility model is that five LED lights can be used to indicate the fatness and thinness of the human body, and the interest and practicality of the height and weight scale are increased.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model;

Fig. 2 schematic diagram of the circuit of the utility model;

Fig. 3 overall working flow diagram of the utility model.

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in detail.

Referring to Figure 1, the fun height and weight scale consists of a scale base 1, a pressure sensor module 2, a scale pole 3, an ultrasonic sensor module 4, a minimum single-chip microcomputer system 5, a first indicator light 6, a second indicator light 7, and a third indicator light. Composed of indicator light 8, fourth indicator light 9, fifth indicator light 10, power supply 11, male and female selection button 12, weight scale pole 3 is vertically fixed on the weight scale base 1, pressure sensor module 2 and power supply 11 are installed on the weight scale Inside the base 1, the male and female selection button 12 is installed on the side of the vertical pole 3 of the weighing scale, the ultrasonic sensor module 4 is fixed on the top of the vertical pole 3 of the weighing scale, and the voltage signals output by the pressure sensor module 2 and the ultrasonic sensor module 4 are all sent to the single-chip microcomputer The minimum system 5, the minimum system 5 of the single-chip microcomputer sends the processing result to the first indicator light 6, the second indicator light 7, the third indicator light 8, the fourth indicator light 9 and the fifth indicator light 10, and the power supply 11 provides electric energy;

Referring to Fig. 2, the minimum system 5 of the single-chip microcomputer includes a single-chip microcomputer, a pull-up resistor of the P0 port, a clock circuit and a reset circuit, the 1 pin of the pull-up resistor of the P0 port is connected to the 40 pin of the single-chip computer, and the 2 pins of the pull-up resistor of the P0 port are connected to the single-chip computer The 39 pins of the pull-up resistor on the P0 port are connected to the 38 pins of the MCU, the 4 pins of the P0 port pull-up resistor are connected to the 37 pins of the MCU, and the 5 pins of the P0 port pull-up resistor are connected to the 36 pins of the MCU. Pin 6 of the pull-up resistor on P0 is connected to pin 35 of the MCU, pin 7 of the pull-up resistor on P0 is connected to pin 34 of the MCU, pin 8 of the pull-up resistor on P0 is connected to pin 33 of the MCU, and pin 9 of the pull-up resistor on P0 is connected to pin 34 of the MCU. The pins are connected to pin 32 of the single-chip microcomputer, X1 in the clock circuit is connected to pin 19 of the single-chip microcomputer, X2 is connected to pin 18 of the single-chip microcomputer, MCURST is connected to pin 9 of the single-chip microcomputer in the reset circuit, and the height of men and women is stored inside the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer Relational formula with body weight, one of the first indicator light 6, the second indicator light 7, the third indicator light 8, the fourth indicator light 9 or the fifth indicator light 10 is lighted by the output signal of the minimum system 5 of the single-chip microcomputer;

Described power supply 11 is a 5 volt DC power supply, and its positive pole connects the 40 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer, and the negative pole connects the 20 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer;

One end of the male and female selection button 12 is connected to the negative pole of the power supply 11, and the other end is connected to the 25 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer;

The pressure sensor module 2 includes a pressure sensor, an amplifier and an A/D converter. The pressure sensor module 2 is externally connected to 4 pins, which are power supply Vcc, clock SCK, data output DT, and ground GND. These 4 pins are connected to Use lead wires to lead out on the pin header, where the power supply Vcc is connected to pin 40 of the microcontroller in the minimum system 5 of the microcontroller, the clock SCK is connected to pin 26 of the microcontroller in the minimum system 5 of the microcontroller, and the data output DT is connected to pin 27 of the microcontroller in the minimum system 5 of the microcontroller Pin, the ground GND is connected to the 20 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer;

The ultrasonic sensor module 4 is externally connected to 4 pins, which are respectively power supply VCC, ground GND, digital signal DO, and analog signal AO. The power supply VCC and ground GND are respectively connected to the positive and negative poles of the power supply 11, and the output analog signal AO Send to the 28 pins of the single-chip microcomputer in the minimum system board 5 of the single-chip microcomputer, and its digital signal DO pin is not connected;

The negative pole of the first indicator light 6 is connected in series with a 470 ohm resistor to the 20 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer, and the positive pole of the first indicator light 6 is connected to the 39 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer. A red light is emitted when an indicator light 6 is lit, indicating obesity;

The negative pole of the second indicator light 7 is connected in series with the 20 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer after a 470-ohm resistor is connected in series, and the positive pole of the second indicator light 7 is connected to the 39 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer. Two indicator lamps 7 are sent yellow light when being lighted, and expression weight is too heavy;

The negative pole of the third indicator light 8 is connected in series with the 20 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer after a 470-ohm resistor is connected in series, and the positive pole of the third indicator light 8 is connected to the 39 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer. When the three indicator lights 8 are lit, green light is emitted, indicating that the body weight is normal;

The negative electrode of the fourth indicator light 9 is connected in series with a 470 ohm resistor to the 20 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer, and the positive pole of the fourth indicator light 9 is connected to the 39 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer. When four indicator lamps 9 are lighted, blue light is emitted, indicating that the body weight is too light;

The negative electrode of the fifth indicator light 10 is connected in series with the 20 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer after a 470 ohm resistor is connected in series, and the positive pole of the fifth indicator light 10 is connected to the 39 pins of the single-chip microcomputer in the minimum system 5 of the single-chip microcomputer. Five indicator lamps 10 emit white light when lighted, indicating underweight.

Referring to Fig. 3, after the minimum system 5 of the single-chip microcomputer starts working, first read the values of the pressure sensor module 2 and the ultrasonic sensor module 4, and judge whether someone has stood on the fun height and weight scale according to the sensor values. Finally, choose whether to press the male or female selection button 12 according to gender, according to the body fat or thin standard of the World Health Organization, male: (height cm-80)×70﹪=standard weight, female: (height cm-70)×60﹪ =Standard weight, plus or minus 10% of the standard weight is normal weight, plus or minus 10% to 20% of the standard weight is overweight or underweight, plus or minus 20% of the standard weight is obesity or underweight, the minimum system of the single chip microcomputer is 5 according to the world The standard of the health organization judges the fatness and thinness of the human body, and the output result is controlled by the indicator light to give instructions. During use, only one of the 5 LED lamps is lit. When the first indicator light 6 emits red light, it means obesity; when the second indicator light 7 emits yellow light, it means that the weight is too heavy; The body weight is normal, when the fourth indicator light 9 emits blue light, it means that the weight is underweight, and when the fifth indicator light 10 emits white light, it means that the weight is underweight. After the minimum system 5 of the single-chip microcomputer judges that the person has stepped off the interesting height and weight scale, all indicator lights are extinguished and the values of the pressure sensor module 2 and the ultrasonic sensor module 4 are read again.

Claims (1)

1. entertaining height and weight scale, it is characterised in that：By scale base（1）, pressure sensor module（2）, scale vertical rod （3）, ultrasonic sensor modules（4）, single-chip minimum system（5）, the first indicator lamp（6）, the second indicator lamp（7）, the 3rd refer to Show lamp（8）, the 4th indicator lamp（9）, the 5th indicator lamp（10）, power supply（11）, men and women's select button（12）Composition, scale vertical rod （3）It is vertically fixed on scale base（1）On, pressure sensor module（2）And power supply（11）Installed in scale base（1）'s Inside, men and women's select button（12）Installed in scale vertical rod（3）Side, ultrasonic sensor modules（4）It is fixed on body weight Scale vertical rod（3）Top, pressure sensor module（2）And ultrasonic sensor modules（4）The voltage signal of output is all sent into list Piece machine minimum system（5）, single-chip minimum system（5）Result is sent into the first indicator lamp（6）, the second indicator lamp（7）, Three indicator lamps（8）, the 4th indicator lamp（9）And the 5th indicator lamp（10）, power supply（11）Electric energy is provided；

Described single-chip minimum system（5）Including single-chip microcomputer, P0 mouths pull-up resistor, clock circuit and reset circuit, on P0 mouths 1 pin of pull-up resistor connects 40 pins of single-chip microcomputer, and 2 pins of P0 mouth pull-up resistors connect 39 pins of single-chip microcomputer, P0 mouths pull-up electricity 3 pins of resistance connect 38 pins of single-chip microcomputer, and 4 pins of P0 mouth pull-up resistors connect 37 pins of single-chip microcomputer, and the 5 of P0 mouth pull-up resistors Pin connects 36 pins of single-chip microcomputer, and 6 pins of P0 mouth pull-up resistors connect 35 pins of single-chip microcomputer, and the pin of P0 mouths pull-up resistor 7 connects 34 pins of single-chip microcomputer, 8 pins of P0 mouth pull-up resistors connect 33 pins of single-chip microcomputer, 9 pin order pieces of P0 mouth pull-up resistors 32 pins of machine, X1 connects 19 pins of single-chip microcomputer in clock circuit, and X2 connects 18 pins of single-chip microcomputer, and MCURST connects in reset circuit 9 pins of single-chip microcomputer, single-chip minimum system（5）In single-chip microcomputer internal storage men and women height and body weight relational expression, monolithic Machine minimum system（5）Output signal controls the first indicator lamp（6）, the second indicator lamp（7）, the 3rd indicator lamp（8）, the 4th indicator lamp （9）Or the 5th indicator lamp（10）In one light；

Described power supply（11）For 5 volts of dc sources, its positive pole connects single-chip minimum system（5）40 pins of middle single-chip microcomputer, bear Pole connects single-chip minimum system（5）20 pins of middle single-chip microcomputer；

Described men and women's select button（12）One end connects power supply（11）Negative pole, the other end connection single-chip minimum system（5） 25 pins of middle single-chip microcomputer；

Described pressure sensor module（2）Including pressure sensor, amplifier and A/D converter, pressure sensor module（2） External 4 pins, are power Vcc respectively, clock SCK, data output DT, ground GND, and this 4 pins are inserted on row-needle receptacle with drawing Line is drawn, and wherein power Vcc connects single-chip minimum system（5）40 pins of middle single-chip microcomputer, clock SCK connect single-chip minimum system （5）26 pins of middle single-chip microcomputer, data output DT connect single-chip minimum system（5）27 pins of middle single-chip microcomputer, ground GND order pieces Machine minimum system（5）20 pins of middle single-chip microcomputer；

Described ultrasonic sensor modules（4）External 4 pins, it is power supply VCC, ground GND, data signal DO respectively, simulates Signal AO, its power supply VCC, GND connect power supply respectively（11）Both positive and negative polarity, it is minimum that its analog signal AO exported is sent into single-chip microcomputer System（5）28 pins of middle single-chip microcomputer, its data signal DO pins are not connected to；

The first described indicator lamp（6）Negative pole connect 470 Europe resistance be followed by single-chip minimum system（5）Middle single-chip microcomputer 20 pins, the first indicator lamp（6）Positive pole connect single-chip minimum system（5）39 pins of middle single-chip microcomputer；

The second described indicator lamp（7）Negative pole connect 470 Europe resistance be followed by single-chip minimum system（5）Middle single-chip microcomputer 20 pins, the second indicator lamp（7）Positive pole connect single-chip minimum system（5）39 pins of middle single-chip microcomputer；

The 3rd described indicator lamp（8）Negative pole connect 470 Europe resistance be followed by single-chip minimum system（5）Middle single-chip microcomputer 20 pins, the 3rd indicator lamp（8）Positive pole connect single-chip minimum system（5）39 pins of middle single-chip microcomputer；

The 4th described indicator lamp（9）Negative pole connect 470 Europe resistance be followed by single-chip minimum system（5）Middle single-chip microcomputer 20 pins, the 4th indicator lamp（9）Positive pole connect single-chip minimum system（5）39 pins of middle single-chip microcomputer；

The 5th described indicator lamp（10）Negative pole connect 470 Europe resistance be followed by single-chip minimum system（5）Middle monolithic 20 pins of machine, the 5th indicator lamp（10）Positive pole connect single-chip minimum system（5）39 pins of middle single-chip microcomputer.