Touch temperature and humidity display device and temperature and humidity monitoring system

Abstract

The utility model discloses a touch temperature and humidity display device and a temperature and humidity monitoring system. The touch control temperature and humidity display device is used for displaying temperature and humidity and comprises a plurality of touch keys and a control module, the key processing unit is used for sensing the capacitance change of the touch key and outputting a sensing signal; the main control chip is used for acquiring and identifying the sensing signal and determining the pressed touch key so as to output a corresponding driving signal; the temperature and humidity sensor is used for detecting temperature and humidity and outputting a detection signal to the main control chip; and a driving chip and a display screen, wherein the driving chip is used for driving the display screen to display. According to the touch control temperature and humidity display device, the parameter setting function is achieved in a touch control mode, the appearance structure of the keys is smooth and free of any gap, and the effects of improving the protection grade design of the touch control temperature and humidity display device and improving the product attractiveness are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature and humidity display, in particular to a touch-controlled temperature and humidity display device and a temperature and humidity monitoring system. Background Art

[0002] The data center room construction standards clearly require that the temperature and humidity of the environment need to be relatively stable, which plays a very important role in the normal operation of the IT facilities in the room. Therefore, it is necessary to deploy intelligent temperature and humidity sensors around the room to monitor the temperature and humidity of the environment in real time, which is used as a reference for controlling the temperature and air volume of the air conditioner. Therefore, there are various types of temperature and humidity products on the market.

[0003] However, there are many types of smart temperature and humidity products on the market. In the actual application scenarios of data centers, most products use physical buttons, which destroy the surface protection effect of the product, may allow dust to enter, contaminate and damage the product, thereby affecting the long-term stability and performance of the sensor.

[0004] Therefore, the existing technology needs to be improved and developed. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a touch-controlled temperature and humidity display device and a temperature and humidity monitoring system, aiming to solve the problem that the physical buttons used in most smart temperature and humidity products in the prior art will destroy the surface protection effect of the products.

[0006] The technical solution of the utility model is as follows: a touch-controlled temperature and humidity display device, wherein the touch-controlled temperature and humidity display device is used to display temperature and humidity, and comprises: a plurality of touch buttons; a button processing unit, respectively connected to the plurality of touch buttons, the button processing unit being used to sense the capacitance change of the touch buttons and output a sensing signal; a main control chip, connected to the button processing unit, the main control chip being used to collect and identify the sensing signal, determine the touch button pressed, and output a corresponding driving signal; a temperature and humidity sensor, connected to the main control chip, the temperature and humidity sensor being used to detect temperature and humidity, and output a detection signal to the main control chip; a driving chip and a display screen, the driving chip being respectively connected to the main control chip and the display screen, the driving chip being used to drive the display screen for display.

[0007] In a further configuration of the utility model, the display screen includes: a function prompt display area, a data display area and a unit display area; the data display area is arranged between the function prompt display area and the unit display area.

[0008] A further configuration of the utility model further includes: an RS485 transceiver and an RS485 communication interface, wherein the RS485 transceiver is connected to the main control chip and the RS485 communication interface respectively.

[0009] A further setting of the utility model, wherein the key processing unit includes: a key processing chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, and a third capacitor; pin 1 of the main control chip is connected to the first resistor, pin 2 of the main control chip is connected to one end of the first capacitor, pin 3 of the main control chip is connected to one end of the second capacitor, and pin 4 of the main control chip is connected to the other end of the first capacitor; the other end of the second capacitor is respectively connected to the other end of the first capacitor and the other end of the third capacitor, one end of the third capacitor is connected to one end of the second capacitor, and the other end of the third capacitor is grounded; pin 5 of the key processing chip is connected to one end of the second resistor, pin 6 of the key processing chip is connected to one end of the third resistor, pin 7 of the key processing chip is connected to the main control chip, and pin 8 of the key processing chip is connected to one end of the fourth resistor.

[0010] A further configuration of the utility model further includes: a step-down circuit, wherein the step-down circuit is connected to the main control chip.

[0011] A further configuration of the utility model further includes: an input protection circuit, wherein the input protection circuit is connected to the step-down circuit and is connected to the input voltage.

[0012] According to a further configuration of the utility model, the input protection circuit includes: a fuse, a first diode, a second diode, a fourth capacitor and a fifth capacitor; one end of the fuse is connected to the input voltage, and the other end of the fuse is respectively connected to one end of the first diode and one end of the second diode; the other end of the first diode is respectively connected to one end of the fourth capacitor and one end of the fifth capacitor; the other end of the second diode is respectively connected to the other end of the fourth capacitor and the other end of the fifth capacitor and is grounded; one end of the fifth capacitor is respectively connected to one end of the fourth capacitor and the step-down circuit; the other end of the fifth capacitor is respectively connected to the other end of the fourth capacitor and the step-down circuit; the step-down circuit is also connected to one end of the third capacitor.

[0013] In a further configuration of the utility model, the plurality of touch buttons specifically include: a menu button, an up button, a down button and a confirmation button.

[0014] A further configuration of the utility model, wherein the main control chip includes: a calculation module, the calculation module is connected to the RS485 transceiver, and the calculation module is used to calculate the dew point temperature, the average temperature change rate and the average humidity change rate.

[0015] Furthermore, the utility model also provides a temperature and humidity monitoring system, which includes: a host computer and the above-mentioned touch-control temperature and humidity display device, and the touch-control temperature and humidity display device is connected to the host computer.

[0016] Beneficial effects: The utility model discloses a touch-controlled temperature and humidity display device and a temperature and humidity monitoring system. The touch-controlled temperature and humidity display device is used for displaying temperature and humidity, and includes: a plurality of touch buttons; a button processing unit, which is respectively connected to the plurality of touch buttons, and the button processing unit is used to sense the capacitance change of the touch buttons and output a sensing signal; a main control chip, which is connected to the button processing unit, and the main control chip is used to collect and identify the sensing signal, determine the pressed touch button, and output a corresponding driving signal; a temperature and humidity sensor, which is connected to the main control chip, and the temperature and humidity sensor is used to detect temperature and humidity, and output a detection signal to the main control chip; a driving chip and a display screen, and the driving chip is respectively connected to the main control chip and the display screen, and the driving chip is used to drive the display screen for display.

[0017] In the utility model, a plurality of touch buttons are arranged on the touch temperature and humidity display device to adjust and set the touch temperature and humidity display device, and the parameter setting function is realized by touch, replacing the physical buttons in the prior art. In this way, the appearance structure of the buttons can be smooth without any gaps, thereby achieving the effect of improving the protection level design of the touch temperature and humidity display device and improving the appearance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a principle block diagram of a touch-controlled temperature and humidity display device provided by the utility model;

[0020] Figure 2 A schematic diagram of the appearance of a touch-controlled temperature and humidity display device provided by the utility model;

[0021] Figure 3 for Figure 1 A schematic diagram of the segment code content of the display screen in a touch temperature and humidity display device described in;

[0022] Figure 4 for Figure 1 A flow chart of touch key operation of a touch temperature and humidity display device as described in;

[0023] Figure 5 for Figure 1 A schematic diagram of circuit connections of a key processing unit, a main control chip and a driving chip in a touch temperature and humidity display device as described in;

[0024] Figure 6 for Figure 1 A schematic diagram of the connection between a step-down circuit and an input protection circuit in a touch-controlled temperature and humidity display device described in the specification.

[0025] Explanation of the accompanying drawings: 10, key processing unit; 20, main control chip; 30, temperature and humidity sensor; 40, drive chip; 50, display screen; 60, RS485 transceiver; 70, RS485 communication interface; 80, step-down circuit; 90, input protection circuit; 21, calculation module; 51, function prompt display area; 52, data display area; 53, unit display area; TP1, menu button; TP2, up button; TP3, down button; TP4, confirmation button; U1, key processing chip; R1, first resistor; R2, second resistor; R3, third resistor; R4, fourth resistor; C1, first capacitor; C2, second capacitor; C3, third capacitor; C4, fourth capacitor; C5, fifth capacitor; D1, first diode; D2, second diode; F1, fuse. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The data center room construction standards clearly stipulate the relative stability requirements for ambient temperature and humidity. This is crucial to ensure the normal operation of IT facilities in the room. To achieve this goal, smart temperature and humidity sensors must be deployed around the room to monitor the temperature and humidity of the environment in real time. These sensors can not only provide accurate environmental data, but also serve as an important reference for controlling air conditioning temperature and air volume.

[0028] There are many kinds of smart temperature and humidity products on the market. However, in the actual application scenarios of data centers, most products are pure data sensing products without screens or buttons, which makes it impossible for users to perform basic interactions on the product side. On the other hand, although some products are equipped with buttons, they use physical buttons, which not only destroys the surface protection effect of the product, but also affects the overall user experience.

[0029] In addition, the products currently on the market mainly provide temperature and humidity display, while the dew point temperature value is usually not included in the product display content. Moreover, the information output by the product often only contains simple temperature and humidity data, but lacks detailed information after data analysis and processing.

[0030] Therefore, based on the above-mentioned technical problems, the present invention provides a touch temperature and humidity display device and a temperature and humidity monitoring system. Figure 1 See figure for detailed explanation.

[0031] like Figures 1 to 6 As shown, the utility model provides a touch temperature and humidity display device, which includes: multiple touch buttons, a button processing unit 10, a main control chip 20, a temperature and humidity sensor 30, a drive chip 40 and a display screen 50; each of the touch buttons is a capacitive touch button, and when the user touches the touch button, the capacitance value of the touch button will change; the button processing unit 10 is respectively connected to the multiple touch buttons, and the button processing unit 10 is used to sense the capacitance change of the touch button and output a sensing signal; the main control chip 20 is connected to the button processing unit 10, and the main control chip 20 is used to collect and identify the sensing signal to determine the touch button pressed, and output a corresponding driving signal; the temperature and humidity sensor 30 is connected to the main control chip 20, and the temperature and humidity sensor 30 is used to detect temperature and humidity, and output a detection signal to the main control chip 20; the drive chip 40 is respectively connected to the main control chip 20 and the display screen 50, and the drive chip 40 is used to drive the display screen 50 to display.

[0032] Specifically, in the utility model, a plurality of touch buttons are arranged on the touch temperature and humidity display device to adjust and set the touch temperature and humidity display device, and the parameter setting function is realized by touch, replacing the physical buttons in the prior art. In this way, the appearance structure of the buttons can be smooth without any gaps, thereby achieving the effect of improving the protection level design of the touch temperature and humidity display device and improving the appearance of the product.

[0033] Further, in a possible implementation manner, as Figure 1 and Figure 2 As shown, Figure 2 Schematic diagram of the external structure of the touch-controlled temperature and humidity display device. The multiple touch buttons specifically include: a menu button TP1, an up button TP2, a down button TP3 and an enter button TP4.

[0034] Among them, the display screen 50 is specifically a 3.5-inch LCD liquid crystal display screen 50, and each of the touch buttons and the display screen 50 are arranged in the same plane. In an embodiment of the utility model, each of the touch buttons is arranged below the display screen 50. In other embodiments, the touch buttons can also be arranged on the side, above or other positions of the display screen 50, and the user can choose according to actual conditions.

[0035] Furthermore, the temperature and humidity sensor 30 is a sensor for detecting the temperature and humidity in the environment. After the temperature and humidity sensor 30 detects the temperature and humidity in the detection environment, it will output a detection signal to the main control chip 20. The main control chip 20 will collect and identify the detection signal, and output the corresponding temperature and humidity signal to the drive chip 40. The drive chip 40 will drive the display screen 50 to display the corresponding temperature and humidity values ​​according to the temperature and humidity signal, so as to achieve the effect of displaying the temperature and humidity in the environment. Among them, the main control chip 20 has an I2C serial communication interface to realize two-way communication between the temperature and humidity sensor 30 and the main control chip 20.

[0036] Furthermore, each of the touch buttons (menu button TP1, up button TP2, down button TP3 and confirmation button TP4) is a capacitive touch button, so when the user touches the touch button, the capacitance value of each touch button will change. The button processing unit 10 is respectively connected to each of the touch buttons to sense the capacitance change of the touch button and output the sensing signal, which is specifically a different voltage signal. The ADC of the main control chip 20 will collect and identify the sensing signal to determine the key value pressed by the user to identify which touch button the user has pressed.

[0037] Correspondingly, after the main control chip 20 collects and identifies the sensing signal, it will output the driving signal to the driving chip 40 through the SPI serial data interface, and the driving chip 40 will drive the display screen 50 to display the corresponding picture according to the driving signal, so as to achieve the effect of setting the parameters of the touch temperature and humidity display device. Among them, the main control chip 20 and the driving chip 40 are in two-way communication.

[0038] Further, in a possible implementation manner, as Figure 3As shown, the display screen 5050 includes: a function prompt display area 51, a data display area 52 and a unit display area 53; the data display area 52 is arranged between the function prompt display area 51 and the unit display area 53; the driver chip 40 drives the function prompt display area 51, the data display area 52 and the unit display area 53 through multiple pins to display the numerical values ​​of relative humidity, temperature or dew point temperature.

[0039] In the embodiment of the present utility model, Figure 3 The display screen 50 is the segment code content of the display screen 50. The display screen 50 can display three rows of indicator values, namely relative humidity, temperature and dew point temperature. In terms of type, the display screen 50 includes the function prompt display area 51, the data display area 52 and the unit display area 53. The data display area 52 is arranged between the function prompt display area 51 and the unit display area 53. In the embodiment of the utility model, the unit display area 53 is arranged on the right side of the unit display area 53.

[0040] For the function prompt display area 51, in the embodiment of the utility model, there are provided RT function prompt, SET function prompt, ADDR function prompt and BAUD function prompt. For the data display area 52, in the embodiment of the utility model, specific values ​​of relative humidity, temperature and dew point temperature can be displayed, and the data display area 52 is a data display area 52 with a negative symbol to display negative values. When the data display 2 is a decimal point, the data display area 52 can display a value range of -99.99-99.99.

[0041] Specifically, the display screen 50 displays relative humidity in a range of 0-99.99% RH, temperature in a range of -99.99-99.99°C or -99.99-99.99°F, and dew point temperature in a range of 0-99.99°C or 0-99.99°F.

[0042] In this way, by setting a 3.5-inch segment code LCD display screen 50 with a resolution of two decimal places, the touch temperature and humidity display device can achieve the effect of high-precision display of temperature, humidity, and dew point temperature data; wherein the dew point temperature is a value obtained based on calculation, which can be used to measure the temperature value of condensation in the environment, thereby providing the computer room maintenance personnel with a good reference for setting the lower limit temperature alarm value.

[0043] also, Figure 3 S1-S8 in the display means that they will light up together when controlling the display. For example, when RT in S1 is displayed, both R and T in S1 will light up instead of R or T alone. Figure 3X1-X3 represent the display control of negative value symbols, DP1-DP9 represent the display control of decimal points, and 1-12 represent the display control of specific values. Figure 3 In the figure, 1, 15, 16, and 30 at the upper and lower ends represent the pins of the display screen 50, which may be specifically GPI general input pins. When used, the pins of the driver chip 40 will be connected to the pins of the display screen 50 to drive and control the display content of the display screen 50 to display the values ​​of relative humidity, temperature, or dew point temperature. Of course, when the user presses the touch button, the driver chip 40 may also drive the display screen 50 through the pins to display the parameter setting content.

[0044] Further, in a possible implementation, the touch temperature and humidity display device further includes: an RS485 transceiver 60 and an RS485 communication interface 70, wherein the RS485 transceiver 60 is respectively connected to the main control chip 20 and the RS485 communication interface 70. The main control chip 20 has a UART1 serial communication interface to achieve two-way communication between the main control chip 20 and the RS485 transceiver 60.

[0045] Specifically, through the RS485 communication interface 70, the touch temperature and humidity display device can be connected to an external device, such as a host computer or a monitoring platform, to achieve two-way communication with the external device, output the temperature and humidity information of the environment, and accept the control of the external device.

[0046] Of course, the display screen 50 can also be turned on or off to display the dew point temperature through the RS485 communication interface 70. The specific implementation method is to set an independent Modbus register in the external device, and the user can set the instruction data and output it to the control chip through the RS485 communication interface 70 to drive the display screen 50 to shield the display of the dew point temperature.

[0047] For example, 0x0000 can be set in the Modbus register to represent turning off the dew point temperature display, and 0x0001 can be set to represent turning on the dew point temperature display. After receiving the instruction data of the serial port through the RS485 communication interface 70, the main control chip 20 can drive the driver chip 40 through instructions to configure the display content of the display screen 50 to turn on or off the display of the dew point temperature. In this way, the user can turn on or off the dew point display with a batch of instructions to meet the needs of different users in different scenarios, thereby achieving the effect of improving flexibility.

[0048] In the present invention, the main control chip includes: a calculation module 21, the calculation module 21 is connected to the RS485 transceiver 60, and the calculation module 21 is used to calculate the dew point temperature, the average temperature change rate and the average humidity change rate.

[0049] Wherein, in the calculation module 21, the calculation formula for the dew point temperature in the environment is:

[0050]

[0051] Among them, t d is the dew point temperature (unit: °C), t is the current temperature (unit: °C), RH is the current relative humidity (unit:%), m is the fixed coefficient 17.62, T n The temperature parameter is fixed at 243.12℃.

[0052] In this way, the main control chip 20 detects the current temperature and current relative humidity of the current environment through the temperature and humidity sensor 30, and performs calculations through the calculation module 21 to calculate the dew point temperature of the current environment.

[0053] In addition, the main control chip 20 also calculates the temperature change rate and humidity change rate of the environment through the calculation module 21. The average temperature and humidity change rate within a fixed time period are referred to as "average temperature change rate" and "average humidity change rate".

[0054] The present invention optimizes the temperature and humidity change rate formula in combination with the scenarios and actual conditions in which the product is used. In the calculation module 21, the present invention combines the monitoring requirements of the actual computer room application environment for temperature and humidity, adopts 5 seconds as a fixed time length, collects 1 temperature and humidity data per second, and calculates the temperature change rate once, and then continuously measures the values ​​of 5 temperature change rates, and then calculates the average value. The value calculated in this way is recorded as the value of the average temperature change rate. This method can eliminate sudden interference in the middle of the sensor and a certain rapid temperature change, and measure the average value of a change rate within 5 seconds; however, our temperature and humidity sampling and calculation cycle is always once per second, so the average temperature change rate is also calculated once per second, and the value of the temperature change rate in the time 5 seconds before the current time is averaged.

[0055] That is, the calculation module 21 in the main control chip 20 is configured with a calculation formula for the average temperature change rate and the average humidity change rate. Specifically:

[0056]

[0057]

[0058] Among them, ΔT represents the temperature change within the nth second, Δρ represents the humidity change within the nth second, Δt represents the nth second, and n=1, 2, 3, 4, 5, 6...

[0059] Note that the average temperature change rate calculated at 6 seconds is In the present invention, the calculation module 21 in the main control chip 20 is configured with the formulas for the average temperature change rate and the average humidity change rate for calculation. Specifically, the main control chip 20 uses a memory stack to process the average temperature change rate in the last 5 seconds, following the first-in-first-out principle. The last 5 seconds of the temperature change rate are always saved, and the new average temperature change rate is calculated using the latest 5 values ​​of the temperature change rate. The average temperature change rate is calculated in the same way.

[0060] The utility model configures the calculation module 21 in the main control chip 20 with a new average temperature change rate and a calculation formula for the average temperature change rate to calculate the average temperature change rate and the average temperature change rate, which is conducive to filtering interference and mutations, and can better express a change trend of temperature and humidity, and can be used as a reference data for measuring substantial changes in temperature and humidity in the environment. Of course, after calculating the average temperature change rate and the average temperature change rate of the current environment, they can also be transmitted to an external device through the RS485 communication interface 70. By displaying the data of 5 standard measurement points to an external device, it is possible to quickly analyze the trend of temperature and humidity changes and more quickly respond to abnormal temperature and humidity.

[0061] In this way, the touch-screen temperature and humidity display device in the utility model can upload the measured temperature, humidity and calculated dew point temperature, average temperature change rate, and average humidity change rate to external devices, such as a host computer and a monitoring platform, through the standard RS485 communication interface 70 using the modbus RTU protocol data.

[0062] Further, in a possible implementation manner, as Figure 1 , Figure 5 and Figure 6 The touch temperature and humidity display device further includes: a step-down circuit 80 and an input protection circuit 90 , wherein the step-down circuit 80 is connected to the main control chip 20 , and the input protection circuit 90 is connected to the step-down circuit 80 and connected to the input voltage.

[0063] Specifically, the step-down circuit 80 can be a DC-DC chip, specifically a chip with model LM2596; the input protection circuit 90 includes: a fuse F1, a first diode D1, a second diode D2, a fourth capacitor C4 and a fifth capacitor C5; one end of the fuse F1 is connected to the input voltage, and the other end of the fuse F1 is respectively connected to one end of the first diode D1 and one end of the second diode D2; the other end of the first diode D1 is respectively connected to one end of the fourth capacitor C4 and one end of the fifth capacitor C5; the other end of the second diode D2 is respectively connected to the other end of the fourth capacitor C4 and the other end of the fifth capacitor C5 and grounded; one end of the fifth capacitor C5 is respectively connected to one end of the fourth capacitor C4 and the step-down circuit 80; the other end of the fifth capacitor C5 is respectively connected to the other end of the fourth capacitor C4 and the step-down circuit 80; the step-down circuit 80 is also connected to one end of the third capacitor C3.

[0064] Among them, the input protection circuit 90 is connected to an external input power supply. The embodiment of the utility model is explained by taking the input power supply as a DC voltage of 12V as an example. The setting of the input protection circuit 90 can play the role of DC polarity reverse connection protection, overcurrent, overvoltage, short circuit and surge protection for the touch-controlled temperature and humidity display device. Among them, the fuse F1 is a recoverable fuse F1, and the second diode D2 plays the role of reverse access. The combination of the fuse F1 and the second diode D2 can protect the circuit from overcurrent, overvoltage and short circuit. The specification model of the fuse F1 determines the overcurrent capacity of the circuit.

[0065] After passing through the input protection circuit 90 , the input power source is stepped down by the step-down circuit 80 , and the 12V input voltage is stepped down to a VDD voltage of 3.3V and input into subsequent circuits.

[0066] Further, in a possible implementation, the key processing unit 10 includes: a key processing chip U1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2, and a third capacitor C3; pin 1 of the main control chip 20 is connected to the first resistor R1, pin 2 of the main control chip 20 is connected to one end of the first capacitor C1, pin 3 of the main control chip 20 is connected to one end of the second capacitor C2, and pin 4 of the main control chip 20 is connected to the other end of the first capacitor C1; The other end of the second capacitor C2 is respectively connected to the other end of the first capacitor C1 and the other end of the third capacitor C3, one end of the third capacitor C3 is connected to one end of the second capacitor C2, and the other end of the third capacitor C3 is grounded; pin 5 of the key processing chip U1 is connected to one end of the second resistor R2, pin 6 of the key processing chip U1 is connected to one end of the third resistor R3, pin 7 of the key processing chip U1 is connected to the main control chip 20, and pin 8 of the key processing chip U1 is connected to one end of the fourth resistor R4.

[0067] Specifically, for the circuit connection relationship of each chip in the touch temperature and humidity display device, as shown in FIG. Figure 5 and Figure 6 As shown. In the present utility model, the menu button TP1, the up button TP2, the down button TP3 and the confirmation button TP4 are respectively connected to a pin of the button processing chip U1, the confirmation button TP4 is connected to the 1st pin of the button processing chip U1 through the first resistor R1, the menu button TP1 is connected to the 5th pin of the button processing chip U1 through the second resistor R2, the up button TP2 is connected to the 6th pin of the button processing chip U1 through the third resistor R3, and the down button TP3 is connected to the 8th pin of the button processing chip U1 through the fourth resistor R4. Pin 3 of the button processing chip U1 is connected to the VDD voltage.

[0068] Pin 7 of the key processing chip U1 is connected to pin 6 of the main control chip 20, pin 1 of the main control chip 20 is connected to the VDD voltage, pin 33 of the main control chip 20 is grounded, pin 20 of the main control chip 20 is connected to pin 18 of the driver chip 40, pin 26 of the main control chip 20 is connected to pin 12 of the driver chip 40, pin 27 of the main control chip 20 is connected to pin 11 of the driver chip 40, pin 28 of the main control chip 20 is connected to pin 10 of the driver chip 40, pin 28 of the main control chip 20 is connected to pin 9 of the driver chip 40, and pins 17 and 16 of the main control chip 20 are both connected to the VDD voltage. Pins 21 to 48 of the driver chip 40 are connected to 30 pins of the display screen 50 to drive the display screen 50 to display different information.

[0069] Among them, in the embodiment of the utility model, the key processing chip U1 is specifically a chip of the PT8041 model, the main control chip 20 is specifically a chip of the ARM Cotex-M0 model, and the driving chip 40 is specifically a chip of the HT1621B model.

[0070] Further, in the embodiment of the present utility model, if Figure 1 , Figure 5 and Figure 6 As shown, the specific touch process for the user touching the touch key. When the user presses each of the touch keys, namely the menu key TP1, the up-turn key TP2, the down-turn key TP3 and the confirmation key TP4, when pressing different touch keys. The key processing chip U1 will generate different analog voltage values ​​on its 7th pin, namely the sensing signal, corresponding to the menu key TP1, the up-turn key TP2, the down-turn key TP3 and the confirmation key TP4, which are 0V, 1 / 4Vdac, 1 / 2Vdac, 3 / 4Vdac respectively (Vadc in the embodiment of the utility model is the analog voltage reference value 2.65V fixed inside the key processing chip U1), and when no key is pressed, the key processing chip U1 will output a high level VDD on its 7th pin, so that by outputting different sensing signals to the main chip, the ADC of the main control chip 20 collects and identifies different analog voltages to determine whether the user presses a key and the key value pressed by the user, thereby outputting the corresponding driving signal to drive the display screen 50 to perform interactive display.

[0071] The display screen 50 is driven specifically by the driving signal after receiving the corresponding driving signal, so as to realize that the segment code of the display screen 50 reaches the content to be displayed.

[0072] Furthermore, the flow chart of the touch key operation of the touch temperature and humidity display device is as follows: Figure 4 As shown. In the utility model, 4 buttons are used to realize the setting of 4 parameters, including: slave address setting, the range is 01-254; baud rate setting, the setting range options are 1200bps, 2400bps, 4800bps, 9600bps, 19200bps, 38400bps, 115200bps, these 7 rate options; temperature offset setting can be adjusted in the range of -5℃ to +5℃ in steps of 0.1℃; humidity offset can be adjusted in the range of -10%-+10%RH in steps of 1%. In this way, the utility model can realize the setting of RS485 slave address, baud rate parameters, and temperature\humidity calibration offset of temperature and humidity through multiple touch buttons.

[0073] In addition, based on the same utility model concept, the utility model also provides a temperature and humidity monitoring system, which includes a host computer and the above-mentioned touch-control temperature and humidity display device, and the touch-control temperature and humidity display device is connected to the host computer.

[0074] Of course, the host computer can also be other external devices such as a monitoring platform. The touch temperature and humidity display device can transmit temperature, humidity, dew point temperature, average temperature change rate and average humidity change rate to the host computer for display through the RS485 communication interface 70, which can quickly analyze the trend of temperature and humidity changes and more quickly reflect the abnormality of temperature and humidity.

[0075] In this way, to sum up, the touch temperature and humidity display device is adjusted and set by multiple touch buttons, and the parameter setting function is realized by touch, which replaces the physical buttons in the prior art. In this way, the appearance structure of the buttons can be smooth without any gaps, thereby achieving the effect of improving the protection level design of the touch temperature and humidity display device and improving the appearance of the product.

[0076] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0077] It should be noted that the present invention takes the touch-controlled temperature and humidity display device and the temperature and humidity monitoring system as examples to introduce the specific structure and working principle of the present invention, but the application of the present invention is not limited to the touch-controlled temperature and humidity display device and the temperature and humidity monitoring system, and can also be applied to the use of other similar devices.

[0078] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A touch temperature and humidity display device for displaying temperature and humidity, characterized in that: include: Multiple touch buttons; a key processing unit, connected to each of the plurality of touch keys, and configured to sense capacitance changes of the touch keys and output a sensing signal; A main control chip connected to the key processing unit, the main control chip is used to collect and identify the sensing signal, determine the touch key pressed, and output a corresponding driving signal; A temperature and humidity sensor is connected to the main control chip, and is used to detect temperature and humidity and output detection signals to the main control chip; A driving chip and a display screen, wherein the driving chip is connected to the main control chip and the display screen respectively, and the driving chip is used to drive the display screen to display; The key processing unit includes: a key processing chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, and a third capacitor; Pin 1 of the main control chip is connected to the first resistor, pin 2 of the main control chip is connected to one end of the first capacitor, pin 3 of the main control chip is connected to one end of the second capacitor, and pin 4 of the main control chip is connected to the other end of the first capacitor; The other end of the second capacitor is connected to the other end of the first capacitor and the other end of the third capacitor respectively, one end of the third capacitor is connected to one end of the second capacitor, and the other end of the third capacitor is grounded; Pin 5 of the key processing chip is connected to one end of the second resistor, pin 6 of the key processing chip is connected to one end of the third resistor, pin 7 of the key processing chip is connected to the main control chip, and pin 8 of the key processing chip is connected to one end of the fourth resistor.

2. The touch-controlled temperature and humidity display device according to claim 1, characterized in that: The display screen includes: a function prompt display area, a data display area and a unit display area; The data display area is arranged between the function prompt display area and the unit display area.

3. The touch-controlled temperature and humidity display device according to claim 2, characterized in that: Also includes: RS485 transceiver and RS485 communication interface, the RS485 transceiver is connected to the main control chip and the RS485 communication interface respectively.

4. The touch-controlled temperature and humidity display device according to claim 1, characterized in that: Also includes: A step-down circuit is connected to the main control chip.

5. The touch-controlled temperature and humidity display device according to claim 4, characterized in that: Also includes: An input protection circuit is connected to the step-down circuit and is connected to an input voltage.

6. The touch-controlled temperature and humidity display device according to claim 5, characterized in that: The input protection circuit comprises: a fuse, a first diode, a second diode, a fourth capacitor and a fifth capacitor; One end of the fuse is connected to the input voltage, and the other end of the fuse is connected to one end of the first diode and one end of the second diode respectively; The other end of the first diode is connected to one end of the fourth capacitor and one end of the fifth capacitor respectively; The other end of the second diode is respectively connected to the other end of the fourth capacitor and the other end of the fifth capacitor and is grounded; One end of the fifth capacitor is connected to one end of the fourth capacitor and the step-down circuit respectively; the other end of the fifth capacitor is connected to the other end of the fourth capacitor and the step-down circuit respectively; The step-down circuit is also connected to one end of the third capacitor.

7. The touch-controlled temperature and humidity display device according to claim 1, characterized in that: The plurality of touch buttons specifically include: a menu button, an up button, a down button and a confirmation button.

8. A temperature and humidity monitoring system, characterized in that , including a host computer and a touch-controlled temperature and humidity display device as described in any one of claims 1 to 7, wherein the touch-controlled temperature and humidity display device is connected to the host computer.

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