Pressure compensation sensor

Abstract

The utility model discloses a pressure compensation sensor, which comprises a circuit board and a touch sensing switch U8, the touch sensing switch U8 is electrically connected with the circuit board, the circuit board is loaded with a main control module and a pressure module, and the main control module comprises a main control chip U1. The pressure module comprises a touch sensing chip U3, a touch sensing switch U8 is electrically connected with the common end between the third end of the touch sensing chip U3 and the capacitor C1, and the common end between the second end of the touch sensing chip U3 and the capacitor C1 is grounded; the first end of the touch sensing chip U3 is electrically connected with the common end between the positive electrode of the diode D2 and the grid electrode of the MOS transistor Q2, and the negative electrode of the diode D2 is electrically connected with the eighteenth end of the main control chip U1. The pressure compensation sensor disclosed by the utility model has the beneficial effects that the touch sensing switch U8 outputs a pressure signal to the touch sensing chip U3, and the touch sensing chip U3 outputs a pressure signal subjected to pressure compensation to the main control chip U1.

Description

Technical Field

[0001] The utility model belongs to the field of sensors, and particularly relates to a pressure compensation sensor. Background Art

[0002] The invention patent application with the publication number of CN110764644A and the theme name of electronic device and pressure compensation method has an IPC classification number of G06F3 / 041 and G01D21 / 02. Its technical solution discloses that "the electronic device includes a housing having a deformation area; a pressure sensor disposed within the housing and opposite to the deformation area, a bonding layer is provided between the pressure sensor and the housing, the pressure sensor is connected to the deformation area through the bonding layer, and the deformation parameter of the bonding layer is related to temperature; and a temperature detection member in contact with the bonding layer and / or the pressure sensor, the temperature detection member is used to detect the temperature of the bonding layer." "The electronic device further includes a control module, and both the pressure sensor 2 and the temperature detection member 4 are electrically connected to the control module. For example, the control module includes: a printed circuit board, the pressure sensor is disposed on the printed circuit board, and the printed circuit board is connected to the main board of the electronic device. Among them, as Figures 1 - 3 shown, the printed circuit board and the main board can be connected by a separate wire or an FPC (flexible printed circuit board).

[0003] It can be seen that the above-mentioned invention patent application has disclosed one of the technical solutions of the pressure compensation method and the electronic device applying the pressure compensation method, which involves the printed circuit board of the control module. However, the above-mentioned invention patent application does not further disclose the circuit structure of the circuit board and needs to be further improved. Summary of the Utility Model

[0004] In view of the current situation of the prior art, the utility model overcomes the above defects and provides a pressure compensation sensor.

[0005] The utility model adopts the following technical solutions. The pressure compensation sensor includes a circuit board and a touch sensing switch U8, and the touch sensing switch U8 is electrically connected to the circuit board. The circuit board is provided with:

[0006] a main control module, and the main control module includes a main control chip U1;

[0007] Pressure module. The pressure module includes a touch sensing chip U3. A touch sensing switch U8 is electrically connected to the common terminal between the 3rd terminal of the touch sensing chip U3 and a capacitor C1. The common terminal between the 2nd terminal of the touch sensing chip U3 and the capacitor C1 is grounded. The 1st terminal of the touch sensing chip U3 is electrically connected to the common terminal between the positive electrode of a diode D2 and the gate of a MOS transistor Q2. The negative electrode of the diode D2 is electrically connected to the 18th terminal of a main control chip U1. The drain of the MOS transistor Q2 is electrically connected to the drain of a MOS transistor Q4. The source of the MOS transistor Q2 is electrically connected to the source of the MOS transistor Q4. The gate of the MOS transistor Q4 is electrically connected to the 19th terminal of the main control chip U1.

[0008] As a preferred technical solution of the above technical solution, the 5th terminal of the touch sensing chip U3 is electrically connected to the common terminal between the source of a MOS transistor Q1, a capacitor C3 and a capacitor C2. The gate of the MOS transistor Q1 is electrically connected to the common terminal between the negative electrode of a diode D1 and a resistor R1. The 6th terminal of the touch sensing chip U3 is grounded at the common terminal between the 4th terminal of the touch sensing chip U3, the capacitor C3, the capacitor C2 and the resistor R1. The positive electrode of the diode D1 is electrically connected to the 17th terminal of the main control chip U1.

[0009] As a preferred technical solution of the above technical solution, the pressure compensation sensor further includes an amplification module. The amplification module includes an amplifier P2. The 1st terminal of the amplifier P2 is electrically connected to one end of a resistor R34. The other end of the resistor R34 is electrically connected to the 16th terminal of the main control chip U1.

[0010] As a preferred technical solution of the above technical solution, the pressure compensation sensor further includes an interface module. The interface module includes a USB to serial port chip U4 and a USB interface U5. The 2nd terminal of the USB interface U5 is electrically connected to the 6th terminal of the USB to serial port chip U4. The 3rd terminal of the USB interface U5 is electrically connected to the 5th terminal of the USB to serial port chip U4. The 2nd terminal of the USB to serial port chip U4 is electrically connected to the 6th terminal of the main control chip U1. The 3rd terminal of the USB to serial port chip U4 is electrically connected to the 5th terminal of the main control chip U1.

[0011] As a preferred technical solution of the above technical solution, the pressure compensation sensor further includes an acceleration module. The acceleration module includes a three-axis acceleration chip U6. The 16th terminal of the three-axis acceleration chip U6 is electrically connected to one end of a resistor R17. The other end of the resistor R17 is electrically connected to the 1st terminal of the amplifier P2.

[0012] For the pressure compensation sensor disclosed by the present utility model, its beneficial effect is that the touch sensing switch U8 outputs a pressure signal to the touch sensing chip U3, and the touch sensing chip U3 outputs a pressure signal compensated by pressure to the main control chip U1. Description of the Drawings

[0013] Figure 1 It is the circuit schematic diagram of the main control module of this application.

[0014] Figure 2 It is the circuit schematic diagram of the pressure module of this application.

[0015] Figure 3 It is the circuit schematic diagram of the amplification module of this application.

[0016] Figure 4 It is the circuit schematic diagram of the interface module of this application.

[0017] Figure 5 It is the circuit schematic diagram of the acceleration module of this application.

[0018] Figure 6 It is the circuit schematic diagram of the battery module of this application. Detailed implementation manners

[0019] The present utility model discloses a pressure compensation sensor. Below, in combination with a preferred embodiment (Embodiment 1), referring to the Figures 1 to 6 drawings, the detailed implementation manners of the present utility model will be further described.

[0020] Referring to the Figures 1 to 6 , Figures 1 to 6 respectively show the circuit structures of the main control module, the pressure module, the amplification module, the interface module, the acceleration module, and the battery module.

[0021] Embodiment 1.

[0022] Preferably, the pressure compensation sensor includes a circuit board (not shown in the figure) and a touch sensing switch U8. The touch sensing switch U8 is electrically connected to the circuit board. The touch sensing switch U8 can be disposed at the place of a traditional mechanical switch, thereby replacing the traditional mechanical switch (as an example, a door handle). The circuit board is onboard with:

[0023] a main control module, and the main control module includes a main control chip U1;

[0024] Pressure module. The pressure module includes a touch sensing chip U3. A touch sensing switch U8 is electrically connected to the common terminal between the 3rd terminal of the touch sensing chip U3 and a capacitor C1. The common terminal between the 2nd terminal of the touch sensing chip U3 and the capacitor C1 is grounded. The 1st terminal of the touch sensing chip U3 is electrically connected to the common terminal between the positive electrode of a diode D2 and the gate of a MOS transistor Q2. The negative electrode of the diode D2 is electrically connected to the 18th terminal of a main control chip U1. The drain of the MOS transistor Q2 is electrically connected to the drain of a MOS transistor Q4. The source of the MOS transistor Q2 is electrically connected to the source of the MOS transistor Q4. The gate of the MOS transistor Q4 is electrically connected to the 19th terminal of the main control chip U1. So that the touch sensing switch U8 outputs a pressure signal to the touch sensing chip U3, and the touch sensing chip U3 outputs a pressure-compensated pressure signal (IO_PEN, IO_SENSE) to the main control chip U1.

[0025] Among them, the 5th terminal of the touch sensing chip U3 is electrically connected to the common terminal between the source of a MOS transistor Q1, a capacitor C3 and a capacitor C2. The gate of the MOS transistor Q1 is electrically connected to the common terminal between the negative electrode of a diode D1 and a resistor R1. The 6th terminal of the touch sensing chip U3 is grounded at the common terminal between the 4th terminal of the touch sensing chip U3, the capacitor C3, the capacitor C2 and the resistor R1. The positive electrode of the diode D1 is electrically connected to the 17th terminal of the main control chip U1. So that the touch sensing switch U8 outputs a pressure signal to the touch sensing chip U3, and the touch sensing chip U3 outputs a compensated reset signal (TOUCH_RST) to the main control chip U1.

[0026] Among them, the pressure compensation sensor further includes an amplification module. The amplification module includes an amplifier P2. The 1st terminal of the amplifier P2 is electrically connected to one end of a resistor R34. The other end of the resistor R34 is electrically connected to the 16th terminal of the main control chip U1. So that the amplification module outputs an amplified acceleration signal to the main control chip U1.

[0027] Among them, the pressure compensation sensor further includes an interface module. The interface module includes a USB-to-serial conversion chip U4 and a USB interface U5. The 2nd terminal of the USB interface U5 is electrically connected to the 6th terminal of the USB-to-serial conversion chip U4. The 3rd terminal of the USB interface U5 is electrically connected to the 5th terminal of the USB-to-serial conversion chip U4. The 2nd terminal of the USB-to-serial conversion chip U4 is electrically connected to the 6th terminal of the main control chip U1. The 3rd terminal of the USB-to-serial conversion chip U4 is electrically connected to the 5th terminal of the main control chip U1. So that the main control chip U1 outputs an output signal to the USB interface U5.

[0028] Among them, the pressure compensation sensor further includes an acceleration module. The acceleration module includes a three-axis acceleration chip U6. The 16th terminal of the three-axis acceleration chip U6 is electrically connected to one end of a resistor R17, and the other end of the resistor R17 is electrically connected to the 1st terminal of an amplifier P2; such that the acceleration module inputs an acceleration signal (RES_ADC) to the amplification module.

[0029] Among them, the pressure compensation sensor further includes a battery module. The battery module outputs corresponding working voltages to each functional module such as the main control module. By way of example, the pressure module further includes a linear voltage regulator U2. The battery module includes a voltage output chip U7. The linear voltage regulator U2 is electrically connected to the voltage output chip U7, and the linear voltage regulator U2 is simultaneously electrically connected to electrical appliances such as a MOS transistor Q3.

[0030] It is worth mentioning that the pressure compensation algorithm of the touch sensing chip U3 that the patent application of the present utility model may involve should be regarded as the prior art. For the specific structures, working principles, and possible control methods and spatial arrangement methods of these technical features, conventional selections in the art can be adopted, and they should not be regarded as the inventive points of the patent of the present utility model. The patent of the present utility model will not be further specifically elaborated.

[0031] For those skilled in the art, it is still possible to modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pressure compensation sensor, comprising a circuit board and a touch sensing switch U8, wherein the touch sensing switch U8 is electrically connected to the circuit board, characterized in that: The circuit board has: Main control module, the main control module includes a main control chip U1; The pressure module includes a touch sensing chip U3, a touch sensing switch U8 electrically connected to a common end between terminal 3 of the touch sensing chip U3 and a capacitor C1, and a common end between terminal 2 of the touch sensing chip U3 and the capacitor C1 is grounded; terminal 1 of the touch sensing chip U3 is electrically connected to a common end between a positive electrode of the diode D2 and a gate of the MOS tube Q2, a negative electrode of the diode D2 is electrically connected to terminal 18 of the main control chip U1, a drain of the MOS tube Q2 is electrically connected to a drain of the MOS tube Q4, a source of the MOS tube Q2 is electrically connected to a source of the MOS tube Q4, and a gate of the MOS tube Q4 is electrically connected to terminal 19 of the main control chip U1.

2. The pressure compensation sensor according to claim 1, characterized in that: Terminal 5 of the touch sensing chip U3 is electrically connected to the source of the MOS tube Q1, the common end between the capacitor C3 and the capacitor C2, the gate of the MOS tube Q1 is electrically connected to the common end between the cathode of the diode D1 and the resistor R1, terminal 6 of the touch sensing chip U3 is grounded to the common end between terminal 4 of the touch sensing chip U3, the capacitor C3, the capacitor C2 and the resistor R1, and the anode of the diode D1 is electrically connected to terminal 17 of the main control chip U1.

3. The pressure compensation sensor according to claim 1, characterized in that: The pressure compensation sensor further includes an amplification module, which includes an amplifier P2, wherein terminal 1 of the amplifier P2 is electrically connected to one end of a resistor R34, and the other end of the resistor R34 is electrically connected to terminal 16 of the main control chip U1.

4. The pressure compensation sensor according to claim 1, characterized in that: The pressure compensation sensor also includes an interface module, which includes a USB-to-serial port chip U4 and a USB interface U5. Terminal 2 of the USB interface U5 is electrically connected to terminal 6 of the USB-to-serial port chip U4, terminal 3 of the USB interface U5 is electrically connected to terminal 5 of the USB-to-serial port chip U4, terminal 2 of the USB-to-serial port chip U4 is electrically connected to terminal 6 of the main control chip U1, and terminal 3 of the USB-to-serial port chip U4 is electrically connected to terminal 5 of the main control chip U1.

5. The pressure compensation sensor according to claim 3, characterized in that: The pressure compensation sensor also includes an acceleration module, which includes a three-axis acceleration chip U6. Terminal 16 of the three-axis acceleration chip U6 is electrically connected to one end of a resistor R17, and the other end of the resistor R17 is electrically connected to terminal 1 of the amplifier P2.

Images