CN209883732U

CN209883732U - Solar power supply type temperature measuring spoon

Info

Publication number: CN209883732U
Application number: CN201920513947.0U
Authority: CN
Inventors: 侯湘
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-16
Filing date: 2019-04-16
Publication date: 2020-01-03
Anticipated expiration: 2029-04-16

Abstract

The utility model discloses a solar energy power supply formula temperature measurement ladle, including ladle body, display module, solar cell panel and the temperature measurement module of setting on the ladle body, encapsulate at inside power management module, CPU, temperature processing circuit and the rechargeable battery of ladle body, solar cell panel is connected with power management module, the rechargeable battery is connected with power management module, display module is connected with CPU, temperature measurement module is connected with temperature processing circuit, temperature processing circuit is connected with CPU. The invention does not need to replace the battery, does not have the detachable movable parts, and has excellent waterproof performance because all electronic circuit parts are in a completely sealed state.

Description

Solar power supply type temperature measuring spoon

Technical Field

The utility model belongs to the temperature measurement technique, especially a solar energy power supply formula temperature measurement ladle.

Background

The electronic temperature measuring device is generally applied to industrial and agricultural production and daily life, and because the analog circuit part and the digital circuit part exist in the circuit of the product, the device consumes more electricity during working compared with some pure digital circuit products (such as calculators). Generally, the products are powered by an external power supply or a built-in high-capacity battery. Like electron temperature measurement and the ladle product of digital display temperature all adopt the mode of battery power supply in use in the market at present, must disassemble the product when the battery power is not enough and change the new battery. This results in the following disadvantages: 1. in daily use, the trouble of power shortage can be met when the electric quantity of the battery is low, and if no standby battery exists, a new battery cannot be replaced in time, the normal use is influenced; 2. the use cost is increased due to the purchase of new batteries, and the environmental protection is affected by the waste batteries; 3. if a larger-volume battery (such as a commonly-used No. 5 and No. 7 cylindrical battery) is used in the product, the product is too large in volume, and particularly for spoon-like products, the use experience of a consumer is directly influenced by the too large volume; if a small button battery is adopted, the battery has low electric quantity and short service time, a plurality of button batteries need to be prepared for standby, the economy is poor, and the battery needs to be replaced frequently and is troublesome. 4. Due to the existence of detachable movable parts for replacing batteries, the product has poor sealing performance. For spoon products, cleaning is often required in use. When the cleaning machine is cleaned, the air inside the product expands with heat and contracts with cold due to the difference between the ambient temperature and the cold and hot water temperatures, so that the waterproof sealing of the movable part fails, water is very easy to enter, and the electronic circuit breaks down.

In the current temperature measuring spoon products in the market, a thermistor or a semiconductor temperature sensing chip is generally adopted as a temperature measuring sensor. This type of sensor is non-metallic material, and the thermal conductivity is low, leads to the temperature measurement time slow (measuring time more than 10 seconds, and some products need several minutes time even just can reach accurate display temperature), and unable real-time reaction measured object temperature variation causes the practicality not enough.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solar energy power supply formula temperature measurement ladle.

Realize the utility model discloses a technical solution does: the utility model provides a solar energy power supply formula temperature measurement ladle, includes ladle body, display module, solar cell panel and the temperature measurement module of setting on the ladle body, encapsulates at inside power management module, CPU, temperature processing circuit and the rechargeable battery of ladle body, solar cell panel is connected with power management module, the rechargeable battery is connected with power management module, display module is connected with CPU, the temperature measurement module is connected with temperature processing circuit, temperature processing circuit is connected with CPU.

Compared with the prior art, the utility model, it is showing the advantage and is: 1) the invention can be charged automatically, and the electric quantity of the battery is always kept in a high-electric-quantity state, so that the trouble of power shortage is avoided; 2) the invention adopts ML1220 button type rechargeable lithium battery, which has long service life and good environmental protection performance; 3) the invention does not need to replace batteries, does not have movable parts to be disassembled, has excellent waterproof performance because all electronic circuit parts are in a completely sealed state, is not influenced by the ambient temperature, the temperature difference of cold water and hot water and the like during cleaning, can be washed and can also be soaked in water for cleaning for a long time; 4) the invention adopts the thermocouple sensor made of metal to measure the temperature, and the temperature measuring speed is high.

The present invention will be described in further detail with reference to the accompanying drawings.

Drawings

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

Fig. 2 is a bottom view of the present invention.

FIG. 3 is a top view of the present invention.

Fig. 4 is a schematic diagram of a temperature processing circuit.

FIG. 5 is a circuit diagram of a power management module.

Fig. 6 is a circuit diagram of a display module.

FIG. 7 is a circuit diagram of a CPU.

Detailed Description

The utility model provides a solar energy power supply formula temperature measurement ladle, includes ladle body, display module, solar cell panel and the temperature measurement module of setting on the ladle body, encapsulates at inside power management module, CPU, temperature processing circuit and the rechargeable battery of ladle body, solar cell panel is connected with power management module, the rechargeable battery is connected with power management module, display module is connected with CPU, the temperature measurement module is connected with temperature processing circuit, temperature processing circuit is connected with CPU.

In a further embodiment, the temperature measurement module is a thermocouple probe R9.

In a further embodiment, the temperature processing circuit includes a thermocouple probe temperature signal processing chip U3, an ambient temperature compensation chip U5, a first capacitor C4 and a second capacitor C5, the first pin Vin + of the temperature processing integrated circuit U3 is connected to one end of the temperature measurement module, the second pin Vss of the temperature processing integrated circuit U3 is grounded, the third pin SCL of the temperature processing integrated circuit U3 is connected to the fourth pin SCLK of the U5, the sixth pin Vin-of the temperature processing integrated circuit U3 is connected to the other end of the temperature measurement module, the fifth pin Vdd of the temperature processing integrated circuit U3 is connected to one end of the first capacitor C4 and a +3V power supply, the other end of the first capacitor C4 is grounded, the first pin Vdd of the ambient temperature compensation chip U5 is connected to one end of the second capacitor C5 and a +3V power supply, the second pin GND of the ambient temperature compensation chip U5 and the other end of the second capacitor C5 are grounded, the fifth pin SDA of the ambient temperature compensation chip U5 is connected with the fourth pin SDA of the temperature processing integrated circuit U3.

In a further embodiment, the power management module includes a voltage regulator integrated circuit U4, a first resistor R10, a first diode D1, a second resistor R11, a second diode D3, a third diode D4, a third capacitor C2, a P-channel MOS transistor Q1, a transistor T1, a third resistor R13, and a fourth capacitor C1, the first pin GND of the voltage regulator integrated circuit U4 is grounded, the second pin of the voltage regulator integrated circuit U4 is connected to one end of the solar cell panel and one end of the third capacitor C2, the other end of the third capacitor C2 is grounded, the third pin Vout of the voltage regulator integrated circuit U4 is connected to one end of the first resistor R10, the other end of the first resistor R10 is connected to one end of the first diode D1, the other end of the first diode D1 is connected to one end of the rechargeable battery, the other end of the first diode D1 is connected to one end of the second resistor R11, the other end of the second resistor R11 is connected with one end of a second diode D3, the other end of the second diode D3 is connected with one end of a third diode D4, the other end of the second resistor R11 is connected with the G pole of a P-channel MOS transistor Q1 and the C pole of a triode T1, one end of the second resistor R11 is connected with the D pole of the P-channel MOS transistor Q1, the S pole of the P-channel MOS transistor Q1 is connected with a +3V power supply and one end of a fourth capacitor C1, the other end of the fourth capacitor C1 is grounded, the E pole of the triode T1 is grounded, the B pole of the triode T1 is connected with one end of a third resistor R13, and the other end of the third resistor R13 is connected with the CPU.

In a further embodiment, the display module comprises a liquid crystal screen U1 and resistors R1-R8, all pins of the liquid crystal screen U1 are connected with the CPU, and the resistors R1-R8 provide 1/2VCC bias voltage for the common electrode COM 0-COM 3 of the liquid crystal screen.

In a further embodiment, the power management module further comprises a key connected with the power management module.

In a further embodiment, the rechargeable battery is a ML1220 button rechargeable lithium battery.

In a further embodiment, a sealing layer is arranged in the shell of the spoon body.

The invention has simple operation, only one key and the position as shown in figure 3. When the key is pressed down, the internal power supply of the product is switched on, the product is started to operate, the temperature measured by the probe is immediately displayed in units of centigrade, and the lower right corner of the liquid crystal display screen displays a unit symbol of centigrade, namely DEG C'; if the button is pressed a further time, then the display is transitioned to the Fahrenheit unit display, and the lower right-hand corner of the LCD display displays the symbol "F" in Fahrenheit; when the key is pressed again, the internal power supply of the product is cut off and the product is shut down. After the invention is started for 60 seconds and no key operation is carried out, the internal power supply is automatically switched off and is shut down, so as to save electric energy. The invention also has the function of displaying the battery power, when the device is started, the battery power is automatically detected, and the four states of high, medium, low and power shortage of the current battery power are graphically displayed at the upper right corner of the display screen (

High state of electric quantity,The state in the electric quantity,

Low state of electric quantity,A power-down state). When the electric quantity is low or the power is short, the user can place the invention under the illumination condition of direct sunlight or direct desk lamp, and the best charging effect can be obtained.

In the invention, the battery does not need to be replaced, so that the invention can completely wrap a layer of sealing material, thereby improving the sealing and waterproof effects. The invention adopts a two-time injection molding process. Firstly, performing injection molding on a core component, and assembling all electronic components in the core component; and then, an outer wrapping layer is injected again, the whole body can be injected and wrapped by adopting transparent materials such as food-grade nontoxic silica gel and the like, a display window and the part of the solar cell panel can also be reserved and made of transparent materials, and other parts are made of other materials, so that the whole sealing and waterproof performance is achieved.

The solar cell panel is adopted for supplying power, the long-life rechargeable lithium battery is arranged in the solar cell panel, the battery does not need to be replaced all the time, no disassembled part exists, all electronic circuit parts are in a completely sealed state, the waterproof performance is excellent, and the solar cell panel is more healthy and environment-friendly. The thermocouple sensor made of metal is used for measuring temperature, LCD is used for displaying, a single chip microcomputer program is used for controlling, and software is used for calculating the temperature, so that the method is rapid and accurate.

The solar cell panel adopted by the invention is a weak-light amorphous silicon solar cell panel, and still has good power supply capacity (stronger power supply capacity and better charging effect under sunlight) even under indoor natural light illumination conditions. After daily use is finished, the solar charging device can be used for charging the internal battery in a self-action manner only by being placed indoors or outdoors with bright light.

Examples

As shown in fig. 1 to 3, a solar power supply type temperature measuring spoon comprises a spoon body, a display module, a solar cell panel and a thermocouple probe R9 which are arranged on the spoon body, a power management module, a CPU, a temperature processing circuit and a rechargeable battery which are packaged inside the spoon body, and a button connected with the power management module, wherein the solar cell panel is connected with the power management module, the rechargeable battery is connected with the power management module, the display module is connected with the CPU, the temperature measuring module is connected with the temperature processing circuit, and the temperature processing circuit is connected with the CPU

The temperature processing circuit comprises a thermocouple probe temperature signal processing chip U3, an ambient temperature compensation chip U5, a first capacitor C4 and a second capacitor C5, a first pin Vin + of the temperature processing integrated circuit U3 is connected with one end of a thermocouple probe R9, a second pin Vss of the temperature processing integrated circuit U3 is grounded, a third pin SCL of the temperature processing integrated circuit U3 is connected with a fourth pin SCLK of the ambient temperature compensation chip U5, a sixth pin Vin-of the temperature processing integrated circuit U3 is connected with the other end of the thermocouple probe R9, a fifth pin Vdd of the temperature processing integrated circuit U3 is connected with one end of the first capacitor C4 and a +3V power supply, the other end of the first capacitor C4 is grounded, a first pin VDD of the ambient temperature compensation chip U5 is connected with one end of a second capacitor C5 and a +3V power supply, a second pin of the ambient temperature compensation chip U5 and the other end of the second capacitor C5 are grounded, the fifth pin SDA of the ambient temperature compensation chip U5 is connected with the fourth pin SDA of the temperature processing integrated circuit U3.

The power management module comprises a voltage regulation integrated circuit U4, a first resistor R10, a first diode D1, a second resistor R11, a second diode D3, a third diode D4, a third capacitor C2, a P-channel MOS tube Q1, a triode T1, a third resistor R13 and a fourth capacitor C1, wherein a first pin GND of the voltage regulation integrated circuit U4 is grounded, a second pin of the voltage regulation integrated circuit U4 is connected with one end of a solar panel D2 and one end of the third capacitor C2, the other end of the third capacitor C2 is grounded with the other end of the solar panel D2, a third pin Vout of the voltage regulation integrated circuit U4 is connected with one end of a first resistor R10, the other end of a first resistor R10 is connected with one end of a first diode D1, the other end of the first diode D1 is connected with one end of a battery BT1, and the other end of a battery BT1 is grounded, the other end of the first diode D1 is connected to one end of a second resistor R11, the other end of the second resistor R11 is connected to one end of a second diode D3, the other end of the second diode D3 is connected to one end of a third diode D4, the other end of the second diode D3 is connected to one end of a key switch, the other end of the second resistor R11 is connected to the G electrode of the P-channel MOS Q1 and the C electrode of the transistor T1, one end of the second resistor R11 is connected to the D electrode of the P-channel MOS Q1, the S electrode of the P-channel MOS Q1 is connected to the +3V power supply and one end of the fourth capacitor C1, the other end of the fourth capacitor C1 is grounded, the E electrode of the transistor T1 is grounded to the other end of the key switch, the B electrode of the transistor T1 is connected to one end of the third resistor R13, and the other end of the third resistor R13 is connected to the CPU 13.

The display module comprises a liquid crystal screen U1 and resistors R1-R8, all pins of the liquid crystal screen U1 are connected with a CPU, and the resistors R1-R8 provide 1/2VCC bias voltage for a common electrode COM 0-COM 3 of the liquid crystal screen.

The hardware of the embodiment mainly comprises four parts:

first, the temperature measurement part, as shown in fig. 4, mainly includes temperature processing integrated circuits U3, U5, and a thermocouple probe R9. The thermocouple probe R9 converts the sensed temperature into an electrical signal, which is amplified and AD converted by a temperature processing integrated circuit U3 and then passes through I²The C bus is input into the CPU. At the same time, the CPU passes through I²The C bus reads the U5 ambient temperature compensation value. And then the CPU calculates through software to obtain the temperature value of the measured object. In practical application, the U3(MCP3421A0T-E/CH) and the U5(MCP9800A5T-M/OTG) are installed at a distance as close as possible, so that the temperature difference between the two chips is reduced, and the temperature compensation is more accurate.

The power management part mainly comprises a solar panel D2, a voltage regulation integrated circuit U4, a cocoa rechargeable battery BT1, a key control circuit switch, a P-channel MOS tube Q1 and a triode T1 as shown in FIG. 5. The P-channel MOS transistor Q1 has a characteristic that it is turned on when the gate is at a low level and turned off when the gate is at a high level. The invention selects a small-area solar cell panel and a small-size battery element. The output voltage and current of the solar panel are greatly influenced by the change of ambient light (the voltage change range of the solar panel in the natural environment is 0V to 8V, and the current change range is 0 to 0.85 mA). After the electric energy generated by the solar panel is stabilized by a voltage regulating integrated circuit U4, the electric energy is limited by a first resistor R10, and then is charged into a rechargeable battery BT1 through a first diode D1(D1 plays a role in anti-reverse current protection); and a P-channel MOS tube Q1 and a triode T1 related circuit complete the function of the power switch of the whole machine. When the SWITCH is pressed down, the circuit is switched on, at the moment, the grid pin of a P-channel MOS tube Q1 is grounded through a second diode D3, the grid voltage of the P-channel MOS tube Q1 is at a low level, the P-channel MOS tube Q1 is switched on, each capacitor device in a rear-stage circuit is rapidly charged and stored with energy to ensure that enough electric energy is supplied to the circuit for a short time when the key is loosened, meanwhile, the CPU is switched on to work and rapidly outputs a high level to the PD0 pin, current generated by the high level flows into a base pin of a triode T1 through a third resistor R13 to SWITCH on the triode T1, the grid of the P-channel MOS tube is set at the low level, so that the conduction of the P-channel MOS tube is kept, and a product is in. In normal working state, the CPU constantly scans the button pin PD7, and when the button switch is pressed, the cathode of the third diode D4 is grounded, and the CPU pin PD7 is directly set to low level. At this time, the CPU obtains a key signal, and the key signal is sequentially recognized by the CPU as a display request and a power-off request in Fahrenheit units. After the computer is started, when a key is pressed for the first time, the display is identified as a Fahrenheit unit display request signal, and the display of the temperature unit at the time of starting is converted into the display of the temperature unit at the time of starting; when the key is pressed again, the key is identified as a shutdown request signal, the CPU outputs a low level at a PD0 pin, so that the triode T1 is cut off, the grid electrode of the P-channel MOS tube is set to be a high level by a second resistor R11, the grid electrode Q1 of the P-channel MOS tube is cut off, the product is powered off and shutdown, at the moment, the pin of the CPU is in a power-off high-resistance state, the triode T1 is kept to be cut off, and therefore the stable state of power-off shutdown is achieved.

And thirdly, a display part. The FSTN type pen-section liquid crystal display screen adopted in the embodiment has the characteristics of high contrast and wide viewing angle. The liquid crystal screen is not provided with a built-in display control chip, as shown in fig. 6, all pins of the liquid crystal screen U1 are directly connected to pins of a CPU and are directly driven by the CPU, and therefore cost and power consumption are effectively reduced. The resistors R1-R8 provide a bias voltage of 1/2VCC to the common electrodes COM 0-COM 3 of the liquid crystal screen.

And fourthly, a CPU part. The part is a complete machine calculation and control core, and an STM8L051F3 singlechip chip is selected. STM8L series chip is absorbed in the application of ultra-low power consumption, and the present embodiment selects STM8L051F3 model chip for use, and this chip has five low-power consumption mode, and operating current is only 350nA under the minimum power consumption mode, and the very applicable this product is used. The CPU part completes the functions of display, power supply management, key management, temperature calculation and the like.

In the embodiment, all designs follow an extremely low power consumption principle, STM8L series low-power-consumption products are selected for the CPU, the static power consumption of a power management circuit is only 1.1uA, the diodes all adopt low-power-consumption Schottky diodes, a relatively complex control circuit is adopted for the circuit when the key is turned off, the power supply of a battery and a rear-stage circuit can be completely cut off, and a widely-used simple method for enabling the CPU to enter a sleep mode to be turned off is not adopted, so that the power-off control method does not consume electric energy at all in the power-off state. Meanwhile, the CPU adopts the technologies of frequency reduction, dormancy and the like to reduce the power consumption during the operation, so that the normal working current of the product is only 0.75 mA. The low power consumption design ensures that the solar cell panel can be normally used for a long time under the condition of power supply of a small-area solar cell panel and a small-size low-power button cell.

Claims

1. The utility model provides a solar energy power supply formula temperature measurement ladle, its characterized in that, includes ladle body, display module, solar cell panel and the temperature measurement module of setting on the ladle body, encapsulates power management module, CPU, temperature processing circuit and the rechargeable battery inside the ladle body, solar cell panel is connected with power management module, the rechargeable battery is connected with power management module, display module is connected with CPU, the temperature measurement module is connected with temperature processing circuit, temperature processing circuit is connected with CPU.

2. The solar powered thermometric ladle of claim 1, wherein the temperature measurement module is a thermocouple probe (R9).

3. The solar powered thermometric spoon according to claim 1, wherein the temperature processing circuit comprises a thermocouple probe temperature signal processing chip U3, an ambient temperature compensation chip U5, a first capacitor (C4) and a second capacitor (C5), the first pin (Vin +) of the temperature processing integrated circuit U3 is connected to one end of the temperature measurement module, the second pin (Vss) of the temperature processing integrated circuit U3 is grounded, the third pin (SCL) of the temperature processing integrated circuit U3 is connected to the fourth pin (SCLK) of the ambient temperature compensation chip U5, the sixth pin (Vin-) of the temperature processing integrated circuit U3 is connected to the other end of the temperature measurement module, the fifth pin (Vdd) of the temperature processing integrated circuit U3 is connected to one end of the first capacitor (C4) and a +3V power supply, the other end of the first capacitor (C4) is grounded, the first pin (VDD) of the ambient temperature compensation chip U5 is connected to one end of the second capacitor (C5) and the +3V power supply, the second pin (GND) of the ambient temperature compensation chip U5 and the other end of the second capacitor (C5) are grounded, and the fifth pin (SDA) of the ambient temperature compensation chip U5 is connected to the fourth pin (SDA) of the temperature processing integrated circuit U3.

4. The solar powered thermometric spoon of claim 1, wherein the power management module comprises a voltage regulation integrated circuit U4, a first resistor (R10), a first diode (D1), a second resistor (R11), a second diode (D3), a third diode (D4), a third capacitor (C2), a P-channel MOS (Q1), a triode (T1), a third resistor (R13) and a fourth capacitor (C1), the first pin (GND) of the voltage regulation integrated circuit U4 is grounded, the second pin of the voltage regulation integrated circuit U4 is connected with one end of the solar panel and one end of the third capacitor (C2), the other end of the third capacitor (C2) is grounded, the third pin (Vout) of the voltage regulation integrated circuit U4 is connected with one end of the first resistor (R10), the other end of the first resistor (R10) is connected with one end of the first diode (D1), the other end of the first diode (D1) is connected with one end of the rechargeable battery, the other end of the first diode (D1) is connected with one end of the second resistor (R11), the other end of the second resistor (R11) is connected with one end of the second diode (D3), the other end of the second diode (D3) is connected with one end of the third diode (D4), the other end of the second resistor (R11) is connected with the G pole of the P-channel MOS tube (Q1) and the C pole of the triode (T1), one end of the second resistor (R11) is connected with the D pole of the P-channel MOS tube (Q1), the S pole of the P-channel MOS tube (Q1) is connected with a +3V power supply and one end of the fourth capacitor (C1), the other end of the fourth capacitor (C1) is grounded, the E pole of the triode (T1) is grounded, the B pole of the T1) is connected with one end of the third resistor (R13), the other end of the third resistor (R13) is connected with the CPU.

5. The solar power supply type temperature measuring spoon as claimed in claim 1, wherein the display module comprises a liquid crystal screen U1 and a resistor (R1-R8), all pins of the liquid crystal screen U1 are connected with a CPU, and the resistor (R1-R8) provides 1/2VCC bias voltage for a common electrode COM 0-COM 3 of the liquid crystal screen.

6. The solar powered thermometric spoon of claim 1, further comprising a button connected to the power management module.

7. The solar-powered thermometric spoon of claim 1, wherein said rechargeable battery is a ML1220 button rechargeable lithium battery.

8. The solar powered temperature measuring spoon as claimed in claim 1, wherein the spoon body housing is provided with a sealing layer.