Force value transmitter

Abstract

The invention discloses a force value transmitter. The force value transmitter comprises an analog-to-digital conversion module, a controller and a Bluetooth module, the input end of the analog-to-digital conversion module is connected with the output end of the pressure sensitive element, the output end of the analog-to-digital conversion module is connected with the controller, and the controller is in wireless communication with terminal equipment through the Bluetooth module; wherein the pressure sensitive element is used for measuring a pressure value borne by the pressure sensitive element and converting the pressure value into a first voltage signal, the analog-to-digital conversion module is used for converting the first voltage signal into a digital signal and sending the digital signal to the controller, and the controller sends the digital signal to terminal equipment through the Bluetooth module. The force value transmitter is in wireless communication with the terminal equipment through the Bluetooth module, pressure data measured by the pressure sensitive element can be wirelessly transmitted to the terminal equipment, the force value transmitter is suitable for industrial sites with complex environmental conditions, convenience of calibration and debugging is remarkably improved, and meanwhile calibration efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of pressure transmission, and in particular to a force transmitter. Background Art

[0002] Force transmitters are widely used in industrial automation control to convert physical pressure signals into electrical signals for processing and monitoring. However, existing force transmitters have some problems in the calibration process, especially in industrial field applications.

[0003] Traditional force transmitters usually rely on potentiometers for calibration. However, potentiometers perform poorly in high and low temperature environments and are prone to errors under extreme temperature conditions. In addition, potentiometers have poor vibration resistance, which may cause calibration errors in a vibrating environment, thereby affecting the accuracy of the measurement. In order to improve these deficiencies, some force transmitters have introduced key calibration. Although key calibration improves the stability of calibration to a certain extent, this method is prone to operational errors, especially in the absence of an instruction manual, it is often difficult for users to operate correctly. In addition, key calibration usually requires opening the transmitter housing, which increases the complexity of debugging and operation time.

[0004] In recent years, some force transmitters have begun to use USB interfaces to connect to computers and perform calibration and debugging through dedicated software. Although this method improves the accuracy and convenience of calibration, when used in industrial sites, users still need to carry a laptop or other host device, which may cause inconvenience in industrial sites with limited space or complex environmental conditions.

[0005] In summary, the existing force transmitters still have problems of calibration difficulty and low efficiency during the calibration process, and a more convenient and efficient calibration method is urgently needed. Summary of the invention

[0006] To this end, the present application provides a force transmitter to solve the problems in the prior art that the force transmitter is difficult to calibrate during the calibration process and has low calibration efficiency.

[0007] In order to achieve the above objectives, this application provides the following technical solutions:

[0008] A force value transmitter comprises an analog-to-digital conversion module, a controller and a Bluetooth module;

[0009] The input end of the analog-to-digital conversion module is connected to the output end of the pressure sensitive element, the output end of the analog-to-digital conversion module is connected to the controller, and the controller communicates wirelessly with the terminal device through the Bluetooth module;

[0010] Among them, the pressure sensitive element is used to measure the pressure value exerted on the pressure sensitive element and convert the pressure value into a first voltage signal, the analog-to-digital conversion module is used to convert the first voltage signal into a digital signal and send the digital signal to the controller, and the controller sends the digital signal to the terminal device through the Bluetooth module.

[0011] Optionally, the controller includes a sixth chip U6, and the sixth chip U6 is an AT32F421C8T7 chip.

[0012] Optionally, the analog-to-digital conversion module includes a fifth chip U5, and the fifth chip U5 is an analog-to-digital converter ADS1230;

[0013] The first pin of the fifth chip U5 is divided into two paths, one path is connected to the +3.3V voltage output terminal, and the other path is grounded via the twenty-ninth capacitor C29; the fifth pin of the fifth chip U5 is connected to one end of the thirty-first capacitor C31; the sixth pin of the fifth chip U5 is connected to the other end of the thirty-second capacitor C32; the seventh pin of the fifth chip U5 is divided into three paths, one path is grounded via the thirtieth capacitor C30, the other path is connected to the second pin of the third terminal P3 via the fifteenth resistor R15, and the third path is connected to one end of the thirty-second capacitor C32; the eighth pin of the fifth chip U5 is divided into three paths, one path is connected to the other end of the thirty-second capacitor C32, and the other path is connected to the first pin of the third terminal P3 via the sixteenth resistor R16 1 pin is connected, and the third is grounded via the thirty-third capacitor C33; the 13th pin of the fifth chip U5 is divided into three paths, one path is connected to the 33rd pin of the sixth chip U6, another path is connected to the +3.3V voltage output terminal via the thirteenth resistor R13, and the third path is grounded via the fourteenth resistor R14; the 14th pin of the fifth chip U5 is divided into three paths, one path is connected to the 32nd pin of the sixth chip U6, another path is connected to the +3.3V voltage output terminal via the twelfth resistor R12, and the third path is grounded via the twenty-eighth capacitor C28; the 15th pin of the fifth chip U5 is connected to the 31st pin of the sixth chip U6, and the 16th pin of the fifth chip U5 is connected to the 30th pin of the sixth chip U6.

[0014] Optionally, the Bluetooth module includes an eighth chip U8, and the eighth chip U8 is a Bluetooth chip CH573F;

[0015] The 3rd pin of the eighth chip U8 is divided into two paths, one of which is connected to the 22nd pin of the eighth chip U8, and the other is grounded via the 44th capacitor C44; the 4th pin of the eighth chip U8 is connected to the 3rd pin of the eighth chip U8 via the fourth inductor L4; the 5th pin of the eighth chip U8 is divided into two paths, one of which is grounded via the 43rd capacitor C43, and the other is connected to the +3.3V voltage output terminal; the 6th pin of the eighth chip U8 is connected to the 1st pin of the fifth terminal P5, and the 7th pin of the eighth chip U8 is connected to the 2nd pin of the fifth terminal P5; the 14th pin of the eighth chip U8 is connected to the 13th pin of the sixth chip U6 via the 20th resistor R20 ; The 15th pin of the eighth chip U8 is connected to the 12th pin of the sixth chip U6 via the 21st resistor R21; the 16th pin of the eighth chip U8 is connected to the 14th pin of the sixth chip U6; the 18th pin of the eighth chip U8 is connected to the 1st pin of the crystal oscillator Y1; the 19th pin of the eighth chip U8 is connected to the 3rd pin of the crystal oscillator Y1; the 20th pin of the eighth chip U8 is grounded via the 42nd capacitor C42; the 21st pin of the eighth chip U8 is connected to the Bluetooth wireless transmitting antenna AT1; the 22nd pin of the eighth chip U8 is grounded via the 41st capacitor C41; the 2nd pin and the 4th pin of the crystal oscillator Y1 are both grounded.

[0016] Optionally, the force value transmitter further includes a status indication module;

[0017] The state indication module includes a first state indication circuit and a second state indication circuit;

[0018] An input end of the first state indication circuit is connected to the controller, and the first state indication circuit is used to indicate a power-on state of the controller;

[0019] The input end of the second state indicating circuit is connected to the controller and the Bluetooth module respectively, and the second state indicating circuit is used to indicate the connection state between the Bluetooth module and the terminal device.

[0020] Optionally, the first state indicating circuit includes an eighteenth light emitting diode D18;

[0021] The anode of the eighteenth light emitting diode D18 is connected to the +3.3V voltage output terminal via the nineteenth resistor R19, and the cathode of the eighteenth light emitting diode D18 is connected to the tenth pin of the sixth chip U6.

[0022] Optionally, the second state indicating circuit includes a nineteenth light emitting diode D19;

[0023] The positive electrode of the nineteenth light emitting diode D19 is connected to the +3.3V voltage output terminal via the eighteenth resistor R18, and the negative electrode of the nineteenth light emitting diode D19 is divided into two paths, one path is connected to the 11th pin of the sixth chip U6, and the other path is connected to the 2nd pin of the eighth chip U8.

[0024] Optionally, the force value transmitter further includes a digital-to-analog conversion module and an operational amplifier module;

[0025] The input end of the digital-to-analog conversion module is connected to the controller, the output end of the digital-to-analog conversion module is connected to the input end of the operational amplifier module, and the output end of the operational amplifier module is connected to the control system.

[0026] Optionally, the digital-to-analog conversion module includes a ninth chip U9, and the ninth chip U9 is a DAC chip GP8211S;

[0027] The first pin of the ninth chip U9 is divided into two paths, one path is connected to the 26th pin of the sixth chip U6, and the other path is connected to the +3.3V voltage output terminal via the twenty-sixth resistor R26; the second pin of the ninth chip U9 is divided into two paths, one path is connected to the 27th pin of the sixth chip U6, and the other path is connected to the +3.3V voltage output terminal via the twenty-fifth resistor R25; the fourth pin of the ninth chip U9 is divided into two paths, one path is connected to ground via the fifty-first capacitor C51, and the other path is connected to the +12V voltage output terminal; the sixth pin of the ninth chip U9 is connected to one end of the twenty-seventh resistor R27, and the other end of the twenty-seventh resistor R27 is divided into three paths, one path is connected to ground via the forty-ninth capacitor C49, another path is connected to ground via the fiftieth capacitor C50, and the third path is the output terminal of the ninth chip U9; the eighth pin of the ninth chip U9 is grounded via the forty-sixth capacitor C46.

[0028] Optionally, the operational amplifier module includes a first operational amplifier chip U10A and a second operational amplifier chip U10B, and both the first operational amplifier chip U10A and the second operational amplifier chip U10B are operational amplifiers MAX44246ASA;

[0029] The second pin of the first operational amplifier chip U10A is divided into two paths, one path is connected to the output end of the ninth chip U9, and the other path is connected to the output end of the first operational amplifier chip U10A; the third pin of the first operational amplifier chip U10A is connected to the T pin via the twenty-eighth resistor R28; the first pin of the first operational amplifier chip U10A is connected to the fifth pin of the second operational amplifier chip U10B via the twenty-ninth resistor R29; the fourth pin of the first operational amplifier chip U10A is divided into two paths, one path is connected to the -10V voltage output end, and the other path is grounded via the fifty-second capacitor C52; the eighth pin of the first operational amplifier chip U10A is divided into two paths, one path is connected to the +12V voltage output end, and the other path is grounded via the forty-fifth capacitor C45;

[0030] The fifth pin of the second operational amplifier chip U10B is connected to one end of the thirty-first resistor R31;

[0031] The 6th pin of the second operational amplifier chip U10B is divided into two paths, one path is connected to the ground via the 24th resistor R24, and the other path is connected to one end of the 22nd resistor R22;

[0032] The 7th pin of the second operational amplifier chip U10B is divided into two paths, one path is connected to one end of the 30th resistor R30, and the other path is connected to the first end of the second transistor Q2;

[0033] The second end of the second transistor Q2 is divided into three paths, one path is connected to ground via a forty-seventh capacitor C47, another path is connected to ground via a forty-eighth capacitor C48, and the third path is connected to the +12V voltage output terminal;

[0034] The third end of the second transistor Q2 is divided into three paths, one path is connected to the other end of the 30th resistor R30, another path is connected to the other end of the 22nd resistor R22, and the third path is connected to one end of the 32nd resistor R32. The other end of the 32nd resistor R32 is divided into two paths, one path is connected to the other end of the 31st resistor R31, and the other path is the output end of the operational amplifier module.

[0035] Compared with the prior art, this application has at least the following beneficial effects:

[0036] The present application provides a force value transmitter including an analog-to-digital conversion module, a controller and a Bluetooth module, wherein the input end of the analog-to-digital conversion module is connected to the output end of the pressure sensitive element, the output end of the analog-to-digital conversion module is connected to the controller, and the controller communicates wirelessly with the terminal device through the Bluetooth module. In the force value transmitter provided by the present application, the pressure sensitive element is used to measure the pressure value borne by the pressure sensitive element, and convert the pressure value into a first voltage signal, the analog-to-digital conversion module is used to convert the first voltage signal into a digital signal, and send the digital signal to the controller, and the controller sends the digital signal to the terminal device through the Bluetooth module, thereby realizing efficient measurement and wireless transmission of the pressure signal. Compared with the prior art, the force value transmitter provided by the present application communicates wirelessly with the terminal device (such as a smart phone, a tablet computer) through the Bluetooth module, and the user can calibrate and debug the force value transmitter without carrying a laptop or other host computer device, which is suitable for industrial sites with limited space or complex environmental conditions, and significantly improves the convenience of calibration and debugging. At the same time, the force value transmitter provided by the present application can utilize the intuitive operation interface of the terminal device to calibrate the force value transmitter through the application program, thereby avoiding the defects of easy wrong pressing in the traditional key calibration method, and reducing the complexity of the operation and the possibility of misoperation. In addition, the force transmitter provided in this application quickly converts the pressure signal into a digital signal through an analog-to-digital conversion module and a controller, and sends it to the terminal device in real time through a Bluetooth module. The entire process does not require opening the transmitter housing or performing tedious manual operations, which greatly simplifies the calibration process and improves calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0038] Figure 1 A circuit principle block diagram of a force transmitter provided in an embodiment of the present application;

[0039] Figure 2 A circuit principle block diagram of another force transmitter provided in an embodiment of the present application;

[0040] Figure 3 A circuit schematic diagram of a controller provided in an embodiment of the present application;

[0041] Figure 4 A circuit schematic diagram of an analog-to-digital conversion module provided in an embodiment of the present application;

[0042] Figure 5 A circuit schematic diagram of a Bluetooth module provided in an embodiment of the present application;

[0043] Figure 6 A circuit schematic diagram of a first state indication circuit provided in an embodiment of the present application;

[0044] Figure 7 A circuit schematic diagram of a second state indication circuit provided in an embodiment of the present application;

[0045] Figure 8 A circuit schematic diagram of a digital-to-analog conversion module provided in an embodiment of the present application;

[0046] Fig. 9 A circuit schematic diagram of an operational amplifier module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0048] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0049] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the purpose of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0050] like Figure 1 As shown, a force transmitter includes an analog-to-digital conversion module, a controller and a Bluetooth module;

[0051] The input end of the analog-to-digital conversion module is connected to the output end of the pressure sensitive element, the output end of the analog-to-digital conversion module is connected to the controller, and the controller communicates wirelessly with the terminal device via the Bluetooth module;

[0052] Among them, the pressure sensitive element is used to measure the pressure value exerted on the pressure sensitive element and convert the pressure value into a first voltage signal. The analog-to-digital conversion module is used to convert the first voltage signal into a digital signal and send the digital signal to the controller. The controller sends the digital signal to the terminal device through the Bluetooth module.

[0053] A force transmitter provided in an embodiment of the present application can realize efficient measurement and wireless transmission of pressure signals. Compared with the prior art, the force transmitter provided in the present application communicates wirelessly with terminal devices (such as smart phones and tablet computers) through a Bluetooth module. Users can calibrate and debug the force transmitter without carrying a laptop or other host computer equipment. It is suitable for industrial sites with limited space or complex environmental conditions, and the convenience of calibration and debugging is significantly improved. At the same time, the force transmitter provided in the present application can utilize the intuitive operation interface of the terminal device to calibrate the force transmitter through an application program, avoiding the defects of easy mispressing in the traditional key calibration method, reducing the complexity of the operation and the possibility of misoperation. In addition, the force transmitter provided in the present application quickly converts the pressure signal into a digital signal through an analog-to-digital conversion module and a controller, and sends it to the terminal device in real time through a Bluetooth module. The whole process does not require opening the transmitter housing or performing cumbersome manual operations, which greatly simplifies the calibration process and improves the calibration efficiency.

[0054] like Figure 3 As shown, in a possible embodiment, the controller includes a sixth chip U6, and the sixth chip U6 is an AT32F421C8T7 chip.

[0055] like Figure 4 As shown, in a possible embodiment, the analog-to-digital conversion module includes a fifth chip U5, and the fifth chip U5 is an analog-to-digital converter ADS1230;

[0056] The first pin of the fifth chip U5 is divided into two paths, one path is connected to the +3.3V voltage output terminal, and the other path is grounded via the twenty-ninth capacitor C29; the fifth pin of the fifth chip U5 is connected to one end of the thirty-first capacitor C31; the sixth pin of the fifth chip U5 is connected to the other end of the thirty-second capacitor C32; the seventh pin of the fifth chip U5 is divided into three paths, one path is grounded via the thirtieth capacitor C30, the other path is connected to the second pin of the third terminal P3 via the fifteenth resistor R15, and the third path is connected to one end of the thirty-second capacitor C32; the eighth pin of the fifth chip U5 is divided into three paths, one path is connected to the other end of the thirty-second capacitor C32, and the other path is connected to the third terminal P3 via the sixteenth resistor R16. The 13th pin of the fifth chip U5 is divided into three paths, one path is connected to the 33rd pin of the sixth chip U6, another path is connected to the +3.3V voltage output terminal via the thirteenth resistor R13, and the third path is grounded via the fourteenth resistor R14; the 14th pin of the fifth chip U5 is divided into three paths, one path is connected to the 32nd pin of the sixth chip U6, another path is connected to the +3.3V voltage output terminal via the twelfth resistor R12, and the third path is grounded via the twenty-eighth capacitor C28; the 15th pin of the fifth chip U5 is connected to the 31st pin of the sixth chip U6, and the 16th pin of the fifth chip U5 is connected to the 30th pin of the sixth chip U6.

[0057] It should be noted that the 2nd, 3rd, 4th, 9th and 11th pins of the fifth chip U5 are all grounded; the 10th and 12th pins of the fifth chip U5 are both connected to the +3.3V voltage output terminal.

[0058] In this embodiment, the DC mV signal output by the pressure sensitive element is sampled by the analog-to-digital conversion module and digitized, and the AD code is transmitted to the controller after digitization.

[0059] like Figure 5 As shown, in a possible embodiment, the Bluetooth module includes an eighth chip U8, and the eighth chip U8 is a Bluetooth chip CH573F;

[0060] The 3rd pin of the eighth chip U8 is divided into two paths, one path is connected to the 22nd pin of the eighth chip U8, and the other path is grounded via the 44th capacitor C44; the 4th pin of the eighth chip U8 is connected to the 3rd pin of the eighth chip U8 through the fourth inductor L4; the 5th pin of the eighth chip U8 is divided into two paths, one path is grounded via the 43rd capacitor C43, and the other path is connected to the +3.3V voltage output terminal; the 6th pin of the eighth chip U8 is connected to the 1st pin of the fifth terminal P5, and the 7th pin of the eighth chip U8 is connected to the 2nd pin of the fifth terminal P5; the 14th pin of the eighth chip U8 is connected to the 13th pin of the sixth chip U6 via the 20th resistor R20. The 15th pin of the eighth chip U8 is connected to the 12th pin of the sixth chip U6 via the 21st resistor R21; the 16th pin of the eighth chip U8 is connected to the 14th pin of the sixth chip U6; the 18th pin of the eighth chip U8 is connected to the 1st pin of the crystal oscillator Y1; the 19th pin of the eighth chip U8 is connected to the 3rd pin of the crystal oscillator Y1; the 20th pin of the eighth chip U8 is grounded via the 42nd capacitor C42; the 21st pin of the eighth chip U8 is connected to the Bluetooth wireless transmitting antenna AT1; the 22nd pin of the eighth chip U8 is grounded via the 41st capacitor C41; the 2nd pin and the 4th pin of the crystal oscillator Y1 are both grounded.

[0061] It should be noted that pin 1, pin 8, pin 9, pin 10, pin 11, pin 12, pin 13, pin 17, pin 23, pin 24, pin 25, pin 26, pin 27 and pin 28 of the eighth chip U8 are all floating.

[0062] It should be noted that the third pin of the fifth terminal P5 is grounded.

[0063] In this embodiment, a small program or APP that can communicate with the Bluetooth module is provided on the terminal device.

[0064] For example, a designated WeChat applet is provided on the terminal device, and the designated WeChat applet can be connected to the controller in the force transmitter via a Bluetooth module.

[0065] like Figure 2 As shown, in a possible embodiment, the force transmitter further includes a status indication module;

[0066] The status indication module includes a first status indication circuit and a second status indication circuit;

[0067] An input end of the first state indication circuit is connected to the controller, and the first state indication circuit is used to indicate a power-on state of the controller;

[0068] The input end of the second state indicating circuit is connected to the controller and the Bluetooth module respectively, and the second state indicating circuit is used to indicate the connection state between the Bluetooth module and the terminal device.

[0069] like Figure 6 As shown, in a possible embodiment, the first state indicating circuit includes an eighteenth light emitting diode D18;

[0070] The anode of the eighteenth light emitting diode D18 is connected to the +3.3V voltage output terminal via the nineteenth resistor R19, and the cathode of the eighteenth light emitting diode D18 is connected to the tenth pin of the sixth chip U6.

[0071] In this embodiment, the eighteenth light emitting diode D18 may be a red indicator light, and the eighteenth light emitting diode D18 is a power-on indicator light.

[0072] like Figure 7 As shown, in a possible embodiment, the second state indicating circuit includes a nineteenth light emitting diode D19;

[0073] The positive electrode of the nineteenth light emitting diode D19 is connected to the +3.3V voltage output terminal via the eighteenth resistor R18, and the negative electrode of the nineteenth light emitting diode D19 is divided into two paths, one path is connected to the 11th pin of the sixth chip U6, and the other path is connected to the 2nd pin of the eighth chip U8.

[0074] It should be noted that, when the Bluetooth module is successfully connected to the terminal device, the nineteenth light emitting diode D19 in the second state indicating circuit emits light.

[0075] In this embodiment, the nineteenth light emitting diode D19 may be a green indicator light, and the nineteenth light emitting diode D19 is an indicator light indicating that the Bluetooth module is successfully connected.

[0076] like Figure 2 As shown, in a possible embodiment, the force value transmitter further includes a digital-to-analog conversion module and an operational amplifier module;

[0077] The input end of the digital-to-analog conversion module is connected to the controller, the output end of the digital-to-analog conversion module is connected to the input end of the operational amplifier module, and the output end of the operational amplifier module is connected to the control system.

[0078] In this embodiment, the control system may be a PLC system for receiving the output signal of the force transmitter, or may be a DCS system for receiving the output signal of the force transmitter, which is not specifically limited in this embodiment.

[0079] like Figure 8 As shown, in a possible embodiment, the digital-to-analog conversion module includes a ninth chip U9, and the ninth chip U9 is a DAC chip GP8211S;

[0080] The first pin of the ninth chip U9 is divided into two paths, one path is connected to the 26th pin of the sixth chip U6, and the other path is connected to the +3.3V voltage output terminal via the twenty-sixth resistor R26; the second pin of the ninth chip U9 is divided into two paths, one path is connected to the 27th pin of the sixth chip U6, and the other path is connected to the +3.3V voltage output terminal via the twenty-fifth resistor R25; the fourth pin of the ninth chip U9 is divided into two paths, one path is grounded via the fifty-first capacitor C51, and the other path is connected to the +12V voltage output terminal; the sixth pin of the ninth chip U9 is connected to one end of the twenty-seventh resistor R27, and the other end of the twenty-seventh resistor R27 is divided into three paths, one path is grounded via the forty-ninth capacitor C49, another path is grounded via the fiftieth capacitor C50, and the third path is the output terminal of the ninth chip U9; the eighth pin of the ninth chip U9 is grounded via the forty-sixth capacitor C46.

[0081] It should be noted that the 3rd and 7th pins of the ninth chip U9 are both left floating.

[0082] It should be noted that the 5th pin and the 9th pin of the ninth chip U9 are both grounded.

[0083] In this embodiment, the digital quantity calculated by the controller is converted into a voltage quantity through a digital-to-analog conversion module.

[0084] like Fig. 9 As shown, in a possible embodiment, the operational amplifier module includes a first operational amplifier chip U10A and a second operational amplifier chip U10B, and the first operational amplifier chip U10A and the second operational amplifier chip U10B are both operational amplifiers MAX44246ASA;

[0085] The second pin of the first operational amplifier chip U10A is divided into two paths, one path is connected to the output end of the ninth chip U9, and the other path is connected to the output end of the first operational amplifier chip U10A; the third pin of the first operational amplifier chip U10A is connected to the T pin via the twenty-eighth resistor R28; the first pin of the first operational amplifier chip U10A is connected to the fifth pin of the second operational amplifier chip U10B via the twenty-ninth resistor R29; the fourth pin of the first operational amplifier chip U10A is divided into two paths, one path is connected to the -10V voltage output end, and the other path is grounded via the fifty-second capacitor C52; the eighth pin of the first operational amplifier chip U10A is divided into two paths, one path is connected to the +12V voltage output end, and the other path is grounded via the forty-fifth capacitor C45;

[0086] The fifth pin of the second operational amplifier chip U10B is connected to one end of the thirty-first resistor R31;

[0087] The 6th pin of the second operational amplifier chip U10B is divided into two paths, one path is connected to the ground via the 24th resistor R24, and the other path is connected to one end of the 22nd resistor R22;

[0088] The 7th pin of the second operational amplifier chip U10B is divided into two paths, one of which is connected to one end of the 30th resistor R30, and the other is connected to the first end of the second transistor Q2;

[0089] The second end of the second transistor Q2 is divided into three paths, one path is grounded via the forty-seventh capacitor C47, another path is grounded via the forty-eighth capacitor C48, and the third path is connected to the +12V voltage output terminal;

[0090] The third end of the second triode Q2 is divided into three paths, one path is connected to the other end of the 30th resistor R30, another path is connected to the other end of the 22nd resistor R22, the third path is connected to one end of the 32nd resistor R32, and the other end of the 32nd resistor R32 is divided into two paths, one path is connected to the other end of the 31st resistor R31, and the other path is the output end of the operational amplifier module.

[0091] In this embodiment, the voltage output by the digital-to-analog conversion module is converted into a current output by the operational amplifier module.

[0092] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A force transmitter, characterized in that: The force value transmitter includes an analog-to-digital conversion module, a controller and a Bluetooth module; The input end of the analog-to-digital conversion module is connected to the output end of the pressure sensitive element, the output end of the analog-to-digital conversion module is connected to the controller, and the controller communicates wirelessly with the terminal device through the Bluetooth module; Among them, the pressure sensitive element is used to measure the pressure value exerted on the pressure sensitive element and convert the pressure value into a first voltage signal, the analog-to-digital conversion module is used to convert the first voltage signal into a digital signal and send the digital signal to the controller, and the controller sends the digital signal to the terminal device through the Bluetooth module.

2. A force transmitter according to claim 1, characterized in that: The controller includes a sixth chip U6, and the sixth chip U6 is an AT32F421C8T7 chip.

3. A force transmitter according to claim 2, characterized in that: The analog-to-digital conversion module includes a fifth chip U5, and the fifth chip U5 is an analog-to-digital converter ADS1230; The first pin of the fifth chip U5 is divided into two paths, one path is connected to the +3.3V voltage output terminal, and the other path is grounded via the twenty-ninth capacitor C29; the fifth pin of the fifth chip U5 is connected to one end of the thirty-first capacitor C31; the sixth pin of the fifth chip U5 is connected to the other end of the thirty-second capacitor C32; the seventh pin of the fifth chip U5 is divided into three paths, one path is grounded via the thirtieth capacitor C30, the other path is connected to the second pin of the third terminal P3 via the fifteenth resistor R15, and the third path is connected to one end of the thirty-second capacitor C32; the eighth pin of the fifth chip U5 is divided into three paths, one path is connected to the other end of the thirty-second capacitor C32, and the other path is connected to the first pin of the third terminal P3 via the sixteenth resistor R16 1 pin is connected, and the third is grounded via the thirty-third capacitor C33; the 13th pin of the fifth chip U5 is divided into three paths, one path is connected to the 33rd pin of the sixth chip U6, another path is connected to the +3.3V voltage output terminal via the thirteenth resistor R13, and the third path is grounded via the fourteenth resistor R14; the 14th pin of the fifth chip U5 is divided into three paths, one path is connected to the 32nd pin of the sixth chip U6, another path is connected to the +3.3V voltage output terminal via the twelfth resistor R12, and the third path is grounded via the twenty-eighth capacitor C28; the 15th pin of the fifth chip U5 is connected to the 31st pin of the sixth chip U6, and the 16th pin of the fifth chip U5 is connected to the 30th pin of the sixth chip U6.

4. A force transmitter according to claim 2, characterized in that: The Bluetooth module includes an eighth chip U8, and the eighth chip U8 is a Bluetooth chip CH573F; The 3rd pin of the eighth chip U8 is divided into two paths, one of which is connected to the 22nd pin of the eighth chip U8, and the other is grounded via the 44th capacitor C44; the 4th pin of the eighth chip U8 is connected to the 3rd pin of the eighth chip U8 via the fourth inductor L4; the 5th pin of the eighth chip U8 is divided into two paths, one of which is grounded via the 43rd capacitor C43, and the other is connected to the +3.3V voltage output terminal; the 6th pin of the eighth chip U8 is connected to the 1st pin of the fifth terminal P5, and the 7th pin of the eighth chip U8 is connected to the 2nd pin of the fifth terminal P5; the 14th pin of the eighth chip U8 is connected to the 13th pin of the sixth chip U6 via the 20th resistor R20 ; The 15th pin of the eighth chip U8 is connected to the 12th pin of the sixth chip U6 via the 21st resistor R21; the 16th pin of the eighth chip U8 is connected to the 14th pin of the sixth chip U6; the 18th pin of the eighth chip U8 is connected to the 1st pin of the crystal oscillator Y1; the 19th pin of the eighth chip U8 is connected to the 3rd pin of the crystal oscillator Y1; the 20th pin of the eighth chip U8 is grounded via the 42nd capacitor C42; the 21st pin of the eighth chip U8 is connected to the Bluetooth wireless transmitting antenna AT1; the 22nd pin of the eighth chip U8 is grounded via the 41st capacitor C41; the 2nd pin and the 4th pin of the crystal oscillator Y1 are both grounded.

5. A force transmitter according to claim 4, characterized in that: The force value transmitter also includes a status indication module; The state indication module includes a first state indication circuit and a second state indication circuit; An input end of the first state indication circuit is connected to the controller, and the first state indication circuit is used to indicate a power-on state of the controller; The input end of the second state indicating circuit is connected to the controller and the Bluetooth module respectively, and the second state indicating circuit is used to indicate the connection state between the Bluetooth module and the terminal device.

6. A force transmitter according to claim 5, characterized in that: The first state indicating circuit comprises an eighteenth light emitting diode D18; The anode of the eighteenth light emitting diode D18 is connected to the +3.3V voltage output terminal via the nineteenth resistor R19, and the cathode of the eighteenth light emitting diode D18 is connected to the tenth pin of the sixth chip U6.

7. A force transmitter according to claim 5, characterized in that: The second state indicating circuit comprises a nineteenth light emitting diode D19; The positive electrode of the nineteenth light emitting diode D19 is connected to the +3.3V voltage output terminal via the eighteenth resistor R18, and the negative electrode of the nineteenth light emitting diode D19 is divided into two paths, one path is connected to the 11th pin of the sixth chip U6, and the other path is connected to the 2nd pin of the eighth chip U8.

8. A force transmitter according to claim 2, characterized in that: The force value transmitter also includes a digital-to-analog conversion module and an operational amplifier module; The input end of the digital-to-analog conversion module is connected to the controller, the output end of the digital-to-analog conversion module is connected to the input end of the operational amplifier module, and the output end of the operational amplifier module is connected to the control system.

9. A force transmitter according to claim 8, characterized in that: The digital-to-analog conversion module includes a ninth chip U9, and the ninth chip U9 is a DAC chip GP8211S; The first pin of the ninth chip U9 is divided into two paths, one path is connected to the 26th pin of the sixth chip U6, and the other path is connected to the +3.3V voltage output terminal via the twenty-sixth resistor R26; the second pin of the ninth chip U9 is divided into two paths, one path is connected to the 27th pin of the sixth chip U6, and the other path is connected to the +3.3V voltage output terminal via the twenty-fifth resistor R25; the fourth pin of the ninth chip U9 is divided into two paths, one path is connected to ground via the fifty-first capacitor C51, and the other path is connected to the +12V voltage output terminal; the sixth pin of the ninth chip U9 is connected to one end of the twenty-seventh resistor R27, and the other end of the twenty-seventh resistor R27 is divided into three paths, one path is connected to ground via the forty-ninth capacitor C49, another path is connected to ground via the fiftieth capacitor C50, and the third path is the output terminal of the ninth chip U9; the eighth pin of the ninth chip U9 is grounded via the forty-sixth capacitor C46.

10. A force transmitter according to claim 9, characterized in that: The operational amplifier module includes a first operational amplifier chip U10A and a second operational amplifier chip U10B, and both the first operational amplifier chip U10A and the second operational amplifier chip U10B are operational amplifiers MAX44246ASA; The second pin of the first operational amplifier chip U10A is divided into two paths, one path is connected to the output end of the ninth chip U9, and the other path is connected to the output end of the first operational amplifier chip U10A; the third pin of the first operational amplifier chip U10A is connected to the T pin via the twenty-eighth resistor R28; the first pin of the first operational amplifier chip U10A is connected to the fifth pin of the second operational amplifier chip U10B via the twenty-ninth resistor R29; the fourth pin of the first operational amplifier chip U10A is divided into two paths, one path is connected to the -10V voltage output end, and the other path is grounded via the fifty-second capacitor C52; the eighth pin of the first operational amplifier chip U10A is divided into two paths, one path is connected to the +12V voltage output end, and the other path is grounded via the forty-fifth capacitor C45; The fifth pin of the second operational amplifier chip U10B is connected to one end of the thirty-first resistor R31; The 6th pin of the second operational amplifier chip U10B is divided into two paths, one path is connected to the ground via the 24th resistor R24, and the other path is connected to one end of the 22nd resistor R22; The 7th pin of the second operational amplifier chip U10B is divided into two paths, one path is connected to one end of the 30th resistor R30, and the other path is connected to the first end of the second transistor Q2; The second end of the second transistor Q2 is divided into three paths, one path is connected to ground via a forty-seventh capacitor C47, another path is connected to ground via a forty-eighth capacitor C48, and the third path is connected to the +12V voltage output terminal; The third end of the second transistor Q2 is divided into three paths, one path is connected to the other end of the 30th resistor R30, another path is connected to the other end of the 22nd resistor R22, and the third path is connected to one end of the 32nd resistor R32. The other end of the 32nd resistor R32 is divided into two paths, one path is connected to the other end of the 31st resistor R31, and the other path is the output end of the operational amplifier module.

Images