A battery-powered vehicle instrument circuit with real-time display and adjustment functions

Abstract

This utility model relates to the field of electric vehicle instrument technology, specifically to an electric vehicle instrument circuit with real-time display and adjustment functions. It includes a touch function module, comprising a first trigger button and a second trigger button. The touch function module converts the capacitance changes caused by different touch methods of the human body touching the first or second button into voltage signals, and then converts these voltage signals into digital signals to determine whether a touch is triggered and the trigger method. This allows for switching between time and mileage on the electric vehicle instrument panel, as well as switching between hours and minutes in time mode, and between single mileage and total mileage in mileage mode. This utility model solution achieves the functions of setting the time, switching the mileage, and setting the mileage on the electric vehicle instrument panel through different touch methods, making the design more practical and user-friendly.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle instrument technology, specifically to an electric vehicle instrument circuit with real-time display and adjustment functions. Background Technology

[0002] Electric vehicle dashboards typically have the function of collecting some basic information about the electric vehicle, such as left turn, right turn, headlights, parking lights, fog lights, speed, and gear. However, with the popularization of electric vehicles, people also hope that electric vehicle dashboards have more functions, such as time setting, mileage switching, and mileage setting. Therefore, there is an urgent need for a new type of electric vehicle dashboard that can set time, mileage, etc. through different touch methods. Utility Model Content

[0003] The present invention aims to provide an electric vehicle instrument circuit with real-time display and adjustment functions, so as to realize the functions of setting the time, switching the mileage, and setting the mileage through different touch methods.

[0004] An electric vehicle instrument circuit with real-time display and adjustment functions includes a touch function module. The touch function module includes a first trigger button and a second trigger button. The touch function module converts the capacitance change caused by the human body touching the first button or the second button in different ways into a voltage signal, and then converts the voltage signal into a digital signal to determine whether the touch is triggered and the way the touch is triggered. This allows for switching between time and mileage on the electric vehicle instrument, as well as switching between hours and minutes in time mode, and switching between single mileage and total mileage in mileage mode.

[0005] A preferred embodiment of this utility model is as follows: the signal input terminal of the touch function module is connected to the third touch sensing electrode and the fifth touch sensing electrode through the third resistor and the seventh resistor, respectively. The third touch sensing electrode and the fifth touch sensing electrode are respectively set on the first trigger button and the second trigger button. When a human touches the third touch sensing electrode or the fifth touch sensing electrode, the parasitic capacitance between the electrode and ground will change. The parasitic capacitance change caused by the touch will be converted into a voltage signal and input to the signal input terminal of the touch detection through the third resistor or the seventh resistor, respectively.

[0006] The preferred embodiment of this utility model is as follows: the touch function module adopts a capacitive touch sensing chip, model FTC334C, with a built-in capacitance detection circuit to monitor the changes in parasitic capacitance of the touch detection input channel in real time; the signal processing circuit converts the changes in parasitic capacitance into digital signals, and determines whether a touch has occurred and the touch method, and outputs the signal output terminal to control the indicator light on the electric vehicle instrument to display the touch status, as well as control the switching of time and mileage on the electric vehicle instrument, or the switching of hours and minutes in the time mode, or the switching of single mileage and total mileage in the mileage mode.

[0007] The beneficial effects of this utility model are as follows: This solution sets two touch electrodes, which are equivalent to touch antennas. Through different touch methods, the time and mileage can be switched first. When switching to time, the time can be set. When setting the time, the hour and minute can be switched to achieve the specific setting of the current hour and minute for accurate display of the current time. When switching to mileage, the single mileage and total mileage can be set. The single mileage can be cleared to zero, while the total mileage can be accumulated.

[0008] The third and seventh resistors are used to convert the capacitance change caused by touch into a voltage signal, and input the corresponding voltage signal to the signal input terminal of the touch test, thereby realizing the detection of different touch methods.

[0009] This solution employs a capacitive touch sensing chip, which can monitor changes in the parasitic capacitance of the touch detection input channel in real time, convert these changes into digital signals, and determine whether a touch has occurred and the type of touch.

[0010] This solution can also use indicator lights on the electric vehicle's dashboard to display the current touch status.

[0011] A preferred embodiment of this utility model includes an instrument clock function module, which displays hours and minutes in a 24-hour format. The instrument clock function module uses a PCF8563T real-time clock chip and has a main power supply and a backup power supply. The main power supply supplies power to the VDD of the PCF8563T real-time clock chip through a first diode. The backup power supply is an energy storage circuit connected in parallel between the negative terminal of the first diode and VDD. The energy storage circuit includes a first resistor, a first electrolytic capacitor, a second electrolytic capacitor, and a sixth capacitor connected in series.

[0012] The preferred embodiment of this utility model is that the PCF8563T real-time clock chip uses a 32.768KHz crystal oscillator to provide a reference clock signal.

[0013] The preferred embodiment of this utility model is as follows: the two signal output terminals of the PCF8563T real-time clock chip are respectively connected to the fifth resistor and the ninth resistor, which pulls the two signal output pins to a high level to ensure that the bus is high when idle, thereby realizing I2C bus communication.

[0014] The beneficial effects are as follows: This utility model provides accurate timekeeping and I2C communication functions through the instrument clock function module.

[0015] The main power supply ensures the normal operation of the real-time clock chip; the backup power supply can continuously supply power to the real-time clock chip when power is lost, maintain clock operation, save time data, and achieve "power-off timekeeping".

[0016] Resistor R1 is a 0Ω resistor, serving as a path between the main power supply and the backup power supply. The 0Ω resistor acts as a "short circuit / adjustment" to ensure stable power supply. Attached Figure Description

[0017] Figure 1 This is a circuit diagram of the touch function module in the instrument circuit of an electric vehicle with real-time display and adjustment functions according to this utility model.

[0018] Figure 2 This is a circuit diagram of the instrument clock function module in the instrument circuit of an electric vehicle with real-time display and adjustment functions according to this utility model. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only for explaining the present invention and do not limit the scope of protection of the present invention.

[0020] The terms "first," "second," etc., used in the specification, claims, and embodiments of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0021] The present invention will be further described in detail below through preferred embodiments:

[0022] As attached Figure 1 As shown: The electric vehicle instrument circuit with real-time display and adjustment functions disclosed in this embodiment includes a touch function module. The touch function module includes a first trigger button and a second trigger button. The touch function module converts the capacitance change caused by the human body touching the first button or the second button in different ways into a voltage signal, and then converts the voltage signal into a digital signal to determine whether the touch is triggered and the way the touch is triggered, thereby switching the time and mileage on the electric vehicle instrument, as well as switching the hour and minute in the time mode, and switching the single mileage and total mileage in the mileage mode.

[0023] In this embodiment, the touch function module uses a capacitive touch sensing chip, model FTC334C, with a built-in capacitance detection circuit to monitor the changes in parasitic capacitance of the touch detection input channel in real time. The signal processing circuit converts the changes in parasitic capacitance into digital signals and determines whether a touch has occurred and the touch method. The signal output terminal controls the indicator light on the electric vehicle instrument panel to display the touch status, and controls the switching of time and mileage on the electric vehicle instrument panel, or the switching of hours and minutes in the time mode, or the switching of single mileage and total mileage in the mileage mode.

[0024] The signal input terminals (pins 1 and 2) of the touch function module are connected to the third touch sensing electrode Key3 and the fifth touch sensing electrode Key5 via the third resistor R3 and the seventh resistor R7, respectively. The third touch sensing electrode Key3 and the fifth touch sensing electrode Key5 are respectively located on the first trigger button and the second trigger button. When a human touches the third touch sensing electrode Key3 or the fifth touch sensing electrode Key5, the parasitic capacitance between the electrode and ground changes. The change in parasitic capacitance caused by the touch is converted into a voltage signal and input to the touch detection signal input terminal via the third resistor R3 or the seventh resistor R7, respectively. Pins 4-8 are grounded. In this embodiment, the touch detection input channel is pins K1-K6, and pins Q1-Q6 output the results. Resistors R8 and R4 are respectively installed on the output circuits of pins 15 and 16 (i.e., Q2 and Q1 pins) for configuring the internal reference capacitor of the chip to ensure detection accuracy. Pins Q1-Q6 are the touch detection output pins of the chip, which can be externally connected to: indicator lights (displaying touch status), relays (controlling loads), MCUs (for further logic processing), etc., to realize the control logic of "touch → function trigger".

[0025] In this embodiment, the capacitive touch sensor chip is powered by a 3.3V power supply. The 3.3V power supply is connected to one end of inductor L2, and the other end of inductor L2 is connected to one end of two parallel capacitors C3 and C7, as well as pin 11 (VDD) of the capacitive touch sensor chip. The other end of capacitor C7 is grounded, and the other end of capacitor C3 is connected to pin 12 of the capacitive touch sensor chip. Inductor L2, capacitors C3 and C7 form a filter circuit. Inductor L2 suppresses high-frequency noise from the power supply, and the capacitors filter out ripple, providing a stable and clean operating voltage for the FTC334C.

[0026] In this embodiment, pin 8 of the capacitive touch sensor chip is grounded through resistor R2. This is often used for short-circuiting / debugging, and serves as a low-impedance path in the Key5 circuit to ensure signal stability.

[0027] During operation, in conjunction with MCU control, firstly, a long press of the second button switches between time and mileage; secondly, a short press of the second button switches between hours and minutes in time mode and between single trip TRIP (A, B) and total mileage (ODO) in mileage mode; thirdly, a short press of the first button performs addition, and a short press of the second button performs subtraction; finally, a long press of the second button saves the data. When setting the time, switching between hours and minutes in time mode, and then adding or subtracting, sets the current time. When setting the mileage, switching between metric and imperial units, and the single trip mileage can be reset to zero.

[0028] As attached Figure 2 As shown in this embodiment, the electric vehicle instrument circuit with real-time display and adjustment functions also includes an instrument clock function module. The instrument clock function module displays hours and minutes in a 24-hour format. The instrument clock function module uses a PCF8563T real-time clock chip and has a main power supply and a backup power supply. The main power supply supplies power to the VDD of the PCF8563T real-time clock chip through a first diode. The backup power supply is an energy storage circuit connected in parallel between the negative terminal of the first diode and VDD. The energy storage circuit includes a first resistor R1, a first electrolytic capacitor EC1, a second electrolytic capacitor EC2, and a sixth capacitor C6 connected in series.

[0029] The PCF8563T real-time clock chip uses a 32.768kHz crystal oscillator to provide the reference clock signal. The two signal output terminals of the PCF8563T real-time clock chip are connected to resistors R5 (fifth resistor) and R9 (ninth resistor), respectively, pulling the two signal output pins (SCL and SDA pins) high to ensure they are high when the bus is idle, thus enabling I2C bus communication.

[0030] Capacitors C11 and C13: Together with the crystal oscillator, they form an oscillation circuit to stabilize the frequency, assist in starting the oscillation, and ensure the accuracy of the clock signal.

[0031] RTC_SCL and RTC_SDA: These are I2C interfaces connected to the main control MCU, used for reading and writing time data (such as setting the initial time and reading the current time).

[0032] In addition to their backup power function, electrolytic capacitors EC1 and EC2 can also assist in filtering the main power supply and reduce power ripple.

[0033] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. Typical known structures and common knowledge techniques in the preferred embodiments have not been described in detail here. Those skilled in the art can improve and implement the technical solution of this utility model based on the inspiration given in these embodiments and their own capabilities. Some typical known structures, known methods or common knowledge techniques should not be obstacles for those skilled in the art to implement this application.

[0034] The scope of protection claimed in this application shall be determined by the contents of its claims. The contents of the utility model description, specific embodiments, and drawings are used to interpret the claims.

[0035] Within the scope of the technical concept of this application, several modifications can be made to the specific implementation of this application, and these modified implementations should also be considered within the protection scope of this application.

Claims

1. A battery-powered vehicle instrument circuit with real-time display and adjustment functions, characterized in that: The device includes a touch function module, which includes a first trigger button and a second trigger button. The touch function module converts the capacitance changes caused by the human body touching the first button or the second button in different ways into voltage signals, and then converts the voltage signals into digital signals to determine whether a touch is triggered and the way the touch is triggered. This allows for switching between time and mileage on the electric vehicle's instrument panel, as well as switching between hours and minutes in the time mode, and switching between single mileage and total mileage in the mileage mode.

2. The battery car meter circuit having real-time display and adjustment function according to claim 1, characterized in that: The signal input terminal of the touch function module is connected to the third touch sensing electrode and the fifth touch sensing electrode through the third resistor and the seventh resistor, respectively. The third touch sensing electrode and the fifth touch sensing electrode are respectively set on the first trigger button and the second trigger button. When a human touches the third touch sensing electrode or the fifth touch sensing electrode, the parasitic capacitance between the electrode and ground will change. The parasitic capacitance change caused by the touch will be converted into a voltage signal and input to the signal input terminal of the touch detection through the third resistor or the seventh resistor, respectively.

3. The battery car meter circuit with real-time display and adjustment function according to claim 2, characterized in that: The touch function module uses a capacitive touch sensing chip, model FTC334C, with a built-in capacitance detection circuit to monitor the changes in parasitic capacitance of the touch detection input channel in real time. The signal processing circuit converts the changes in parasitic capacitance into digital signals and determines whether a touch has occurred and the type of touch. The signal output terminal controls the indicator light on the electric vehicle's instrument panel to display the touch status, as well as controls the switching of time and mileage on the electric vehicle's instrument panel, or the switching of hours and minutes in the time mode, or the switching of single mileage and total mileage in the mileage mode.

4. The battery car meter circuit having real-time display and adjustment function according to claim 1, characterized in that: It also includes an instrument clock function module, which displays hours and minutes in a 24-hour format. The instrument clock function module uses a PCF8563T real-time clock chip and has a main power supply and a backup power supply. The main power supply supplies power to the VDD of the PCF8563T real-time clock chip through a first diode. The backup power supply is an energy storage circuit connected in parallel between the negative terminal of the first diode and VDD. The energy storage circuit includes a first resistor, a first electrolytic capacitor, a second electrolytic capacitor, and a sixth capacitor connected in series.

5. The battery car meter circuit with real-time display and adjustment function according to claim 4, characterized in that: The PCF8563T real-time clock chip uses a 32.768kHz crystal oscillator to provide a reference clock signal.

6. The battery car meter circuit with real-time display and adjustment function according to claim 5, characterized in that: The PCF8563T real-time clock chip has two signal output pins connected to the fifth and ninth resistors respectively. Pulling the two signal output pins to a high level ensures that the bus is high when idle, thus enabling I2C bus communication.

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