CN206378226U - Pressure detector - Google Patents
Pressure detector Download PDFInfo
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- CN206378226U CN206378226U CN201621478217.4U CN201621478217U CN206378226U CN 206378226 U CN206378226 U CN 206378226U CN 201621478217 U CN201621478217 U CN 201621478217U CN 206378226 U CN206378226 U CN 206378226U
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Abstract
本实用新型公开了压力检测器。传统指针式压力表检测误差大，且人工读取又进一步造成误差。本实用新型包括电池组、供电模块、电量检测模块、信号处理模块和单片机；电池组由两节串联的1.5V干电池组成；供电模块通过稳压芯片将电池组的电压稳压到3.3V为单片机及信号处理模块供电；电量检测模块检测电池组的输出电压值并传输给单片机，得出电池组的剩余电量；信号处理模块中的压力传感器根据受到的压力大小产生相应的电压信号，信号处理模块通过基准电压芯片、放大器及仪表放大器将压力传感器产生的电压信号放大后传输给单片机，单片机将检测到的压力值显示在显示屏上。本实用新型通电后自动检测压力值，且具有检测电池剩余电量的功能。
The utility model discloses a pressure detector. The traditional pointer pressure gauge has a large detection error, and manual reading further causes errors. The utility model includes a battery pack, a power supply module, a power detection module, a signal processing module and a single-chip microcomputer; the battery pack is composed of two 1.5V dry batteries connected in series; and the signal processing module for power supply; the power detection module detects the output voltage value of the battery pack and transmits it to the microcontroller to obtain the remaining power of the battery pack; the pressure sensor in the signal processing module generates a corresponding voltage signal according to the pressure received, and the signal processing module The voltage signal generated by the pressure sensor is amplified by the reference voltage chip, the amplifier and the instrument amplifier, and then transmitted to the single-chip microcomputer, and the single-chip microcomputer displays the detected pressure value on the display screen. The utility model automatically detects the pressure value after being electrified, and has the function of detecting the remaining power of the battery.
Description
技术领域technical field
本实用新型属于压力检测技术领域，具体涉及一种用于检测压力大小的压力检测器。The utility model belongs to the technical field of pressure detection, in particular to a pressure detector for detecting pressure.
背景技术Background technique
随着工业技术的发展，高精度的测量方式越来越受到人们的需要。由于传统指针式压力表检测误差大，且人工读取又进一步造成误差。此外，传统指针式压力表体积较大，携带不方便且价格较高。因此，能够精确检测压力值的压力检测装置越发受到欢迎。With the development of industrial technology, people need more and more high-precision measurement methods. Due to the large detection error of the traditional pointer pressure gauge, and the manual reading further causes errors. In addition, traditional pointer pressure gauges are bulky, inconvenient to carry and expensive. Therefore, pressure detection devices capable of accurately detecting pressure values are becoming more and more popular.
发明内容Contents of the invention
本实用新型的目的在于提供一种能够精确检测压力值的压力检测器。The purpose of the utility model is to provide a pressure detector capable of accurately detecting pressure values.
本实用新型包括电池组、供电模块、电量检测模块、信号处理模块和单片机。所述的电池组由两节串联的1.5V干电池组成；所述的供电模块通过稳压芯片将电池组的电压稳压到3.3V为单片机及信号处理模块供电。所述的电量检测模块检测电池组的输出电压值并传输给单片机，得出电池组的剩余电量。The utility model comprises a battery pack, a power supply module, a power detection module, a signal processing module and a single-chip microcomputer. The battery pack is composed of two 1.5V dry batteries connected in series; the power supply module stabilizes the voltage of the battery pack to 3.3V through a voltage stabilizing chip to supply power for the single-chip microcomputer and the signal processing module. The power detection module detects the output voltage value of the battery pack and transmits it to the single-chip microcomputer to obtain the remaining power of the battery pack.
所述的信号处理模块包括压力传感器、基准电压芯片、精密放大器和仪表放大器；所述的压力传感器为扩散硅压力传感器；所述的基准电压芯片采用REF3325AIDBZR基准电压芯片；所述的精密放大器采用OPA333AIDBVR放大器；所述的仪表放大器采用INA333A仪表放大器。基准电压芯片的1管脚接电容C1的一端及供电模块的输出端；电容C1的另一端接地；基准电压芯片的3管脚接地；基准电压芯片的2管脚接单片机的VREF管脚、精密放大器的3管脚及电容C2的一端；电容C2的另一端接地。精密放大器的1管脚接压力传感器的正电压输入端；精密放大器的2管脚接地；精密放大器的4管脚接第一电阻R1的一端及压力传感器的负电压输入端；第一电阻R1的另一端接地；精密放大器的5管脚接供电模块的输出端。仪表放大器的1管脚经过第三电阻R3与仪表放大器的8管脚相连。仪表放大器的2管脚接压力传感器的电压差信号负端；仪表放大器的3管脚接压力传感器的电压差信号正端；仪表放大器的4管脚及5管脚均接地。仪表放大器的6管脚接第二电阻R2的一端；第二电阻R2的另一端接电容C7的一端及单片机的第一I/O口，单片机的第一I/O口具有A/D转换功能；电容C7的另一端接地。仪表放大器的7管脚接供电模块的输出端。The signal processing module includes a pressure sensor, a reference voltage chip, a precision amplifier and an instrument amplifier; the pressure sensor is a diffused silicon pressure sensor; the reference voltage chip adopts a REF3325AIDBZR reference voltage chip; the precision amplifier adopts an OPA333AIDBVR Amplifier; the instrumentation amplifier adopts INA333A instrumentation amplifier. Pin 1 of the reference voltage chip is connected to one end of capacitor C1 and the output end of the power supply module; the other end of capacitor C1 is grounded; pin 3 of the reference voltage chip is connected to ground; pin 2 of the reference voltage chip is connected to the VREF pin of the microcontroller. Pin 3 of the amplifier and one end of capacitor C2; the other end of capacitor C2 is grounded. Pin 1 of the precision amplifier is connected to the positive voltage input end of the pressure sensor; pin 2 of the precision amplifier is grounded; pin 4 of the precision amplifier is connected to one end of the first resistor R1 and the negative voltage input end of the pressure sensor; The other end is grounded; pin 5 of the precision amplifier is connected to the output end of the power supply module. Pin 1 of the instrumentation amplifier is connected to pin 8 of the instrumentation amplifier through the third resistor R3. Pin 2 of the instrumentation amplifier is connected to the negative terminal of the differential voltage signal of the pressure sensor; pin 3 of the instrumentation amplifier is connected to the positive terminal of the differential voltage signal of the pressure sensor; pins 4 and 5 of the instrumentation amplifier are both grounded. Pin 6 of the instrumentation amplifier is connected to one end of the second resistor R2; the other end of the second resistor R2 is connected to one end of the capacitor C7 and the first I/O port of the single-chip microcomputer, and the first I/O port of the single-chip microcomputer has A/D conversion function ; The other end of the capacitor C7 is grounded. Pin 7 of the instrumentation amplifier is connected to the output terminal of the power supply module.
所述的压力传感器采用DP10压力传感器。The pressure sensor adopts DP10 pressure sensor.
所述的供电模块包括稳压芯片U3，所述的稳压芯片采用HT7733稳压芯片；稳压芯片的3管脚接二极管D1的正极及电感L1的一端；电感L1的另一端接电容C5、电容C6的一端及电池组的正极；电容C5及电容C6的另一端均接地。稳压芯片的2管脚接电容C3、电容C4的一端及二极管D1的负极。电容C3及电容C4的另一端均接地。稳压芯片的1管脚接地。稳压芯片的2管脚即供电模块的输出端。The power supply module includes a voltage stabilizing chip U3, and the voltage stabilizing chip adopts a HT7733 voltage stabilizing chip; the 3 pins of the voltage stabilizing chip are connected to the positive pole of the diode D1 and one end of the inductor L1; the other end of the inductor L1 is connected to the capacitor C5, One end of the capacitor C6 and the positive pole of the battery pack; the other ends of the capacitor C5 and the capacitor C6 are both grounded. Pin 2 of the voltage regulator chip is connected to capacitor C3, one end of capacitor C4 and the cathode of diode D1. The other ends of the capacitor C3 and the capacitor C4 are both grounded. Pin 1 of the regulator chip is grounded. Pin 2 of the voltage regulator chip is the output terminal of the power supply module.
所述的单片机采用STM8L052R8T6单片机；所述的单片机的VDD1、VDD2、VDD3、VDDA及VLCD管脚均接供电模块的输出端。单片机的VSS1、VSS2、VSS3及VSSA管脚均接地。The single-chip microcomputer adopts STM8L052R8T6 single-chip microcomputer; the VDD1, VDD2, VDD3, VDDA and VLCD pins of the single-chip microcomputer are all connected to the output end of the power supply module. The VSS1, VSS2, VSS3 and VSSA pins of the microcontroller are all grounded.
所述的电量检测模块包括三极管Q1；所述的三极管Q1的基极接第六电阻R6及第七电阻R7的一端；第六电阻R6的另一端接单片机的第二I/O口；第七电阻R7的另一端接地；三极管Q1的发射极接地；三极管Q1的集电极接第五电阻R5的一端；第五电阻R5的另一端接第四电阻R4的一端及单片机的第三I/O口，单片机的第三I/O口具有A/D转换功能；第四电阻R4的另一端接电池组的正极。The power detection module includes a triode Q1; the base of the triode Q1 is connected to one end of the sixth resistor R6 and the seventh resistor R7; the other end of the sixth resistor R6 is connected to the second I/O port of the microcontroller; the seventh The other end of the resistor R7 is grounded; the emitter of the transistor Q1 is grounded; the collector of the transistor Q1 is connected to one end of the fifth resistor R5; the other end of the fifth resistor R5 is connected to one end of the fourth resistor R4 and the third I/O port of the microcontroller , the third I/O port of the microcontroller has an A/D conversion function; the other end of the fourth resistor R4 is connected to the positive pole of the battery pack.
本实用新型具有的有益效果是：The beneficial effect that the utility model has is:
1、本实用新型操作简单，通电后自动检测压力值。1. The utility model is easy to operate and automatically detects the pressure value after power-on.
2、本实用新型能够检测电池剩余电量。2. The utility model can detect the remaining power of the battery.
附图说明Description of drawings
图1为本实用新型的系统框图；Fig. 1 is a system block diagram of the utility model;
图2为本实用新型中供电模块的电路原理图；Fig. 2 is the circuit schematic diagram of the power supply module in the utility model;
图3为本实用新型中单片机的电路原理图；Fig. 3 is the circuit schematic diagram of single-chip microcomputer in the utility model;
图4为本实用新型中电量检测模块的电路原理图；Fig. 4 is the circuit schematic diagram of the electricity detection module in the utility model;
图5为本实用新型中信号处理模块的电路原理图。Fig. 5 is a schematic circuit diagram of the signal processing module in the present invention.
具体实施方式detailed description
下面结合附图对本实用新型作进一步说明。Below in conjunction with accompanying drawing, the utility model is further described.
如图1所示，压力检测器，包括电池组、供电模块101、电量检测模块102、信号处理模块103和单片机104。电池组由两节串联的1.5V干电池组成；供电模块101通过稳压芯片将电池组的电压稳压到3.3V为单片机104及信号处理模块103供电。电量检测模块102检测电池组的输出电压值并传输给单片机104，得出电池组的剩余电量。信号处理模块103中的压力传感器根据受到的压力大小产生相应的电压信号，信号处理模块103通过基准电压芯片、放大器及仪表放大器将压力传感器产生的电压信号放大后传输给单片机104，单片机104将检测到的压力值显示在显示屏上。As shown in FIG. 1 , the pressure detector includes a battery pack, a power supply module 101 , a power detection module 102 , a signal processing module 103 and a single-chip microcomputer 104 . The battery pack is composed of two 1.5V dry batteries connected in series; the power supply module 101 stabilizes the voltage of the battery pack to 3.3V through a voltage regulator chip to supply power for the single-chip microcomputer 104 and the signal processing module 103 . The power detection module 102 detects the output voltage of the battery pack and transmits it to the microcontroller 104 to obtain the remaining power of the battery pack. The pressure sensor in the signal processing module 103 generates a corresponding voltage signal according to the pressure received, and the signal processing module 103 amplifies the voltage signal generated by the pressure sensor through a reference voltage chip, an amplifier, and an instrument amplifier and transmits it to the single-chip microcomputer 104, and the single-chip microcomputer 104 will detect The obtained pressure value is displayed on the display.
如图2所示，供电模块101包括稳压芯片U3，稳压芯片U3采用HT7733稳压芯片；稳压芯片U3的3管脚接二极管D1的正极及电感L1的一端；电感L1的另一端接电容C5、电容C6的一端及电池组的正极BAT；电容C5及电容C6的另一端均接地。稳压芯片U3的2管脚接电容C3、电容C4的一端及二极管D1的负极。电容C3及电容C4的另一端均接地。稳压芯片U3的1管脚接地。稳压芯片U3的2管脚即供电模块101的输出端VCC。As shown in Figure 2, the power supply module 101 includes a voltage stabilizing chip U3, and the voltage stabilizing chip U3 adopts the HT7733 voltage stabilizing chip; the pin 3 of the voltage stabilizing chip U3 is connected to the anode of the diode D1 and one end of the inductor L1; the other end of the inductor L1 is connected to One end of the capacitor C5 and the capacitor C6 and the positive electrode BAT of the battery pack; the other ends of the capacitor C5 and the capacitor C6 are both grounded. Pin 2 of the voltage regulator chip U3 is connected to capacitor C3, one end of capacitor C4 and the cathode of diode D1. The other ends of the capacitor C3 and the capacitor C4 are both grounded. Pin 1 of the voltage regulator chip U3 is grounded. Pin 2 of the voltage regulator chip U3 is the output terminal VCC of the power supply module 101 .
如图3所示，单片机104采用STM8L052R8T6单片机；单片机104的VDD1、VDD2、VDD3、VDDA及VLCD管脚均接供电模块101的输出端VCC。单片机104的VSS1、VSS2、VSS3及VSSA管脚均接地。As shown in FIG. 3 , the single-chip microcomputer 104 adopts STM8L052R8T6 single-chip microcomputer; VDD1, VDD2, VDD3, VDDA and VLCD pins of the single-chip microcomputer 104 are all connected to the output terminal VCC of the power supply module 101 . The VSS1 , VSS2 , VSS3 and VSSA pins of the microcontroller 104 are all grounded.
如图4所示，电量检测模块102包括三极管Q1；三极管Q1的基极接第六电阻R6及第七电阻R7的一端；第六电阻R6的另一端接单片机104的EL-ctrl管脚；第七电阻R7的另一端接地；三极管Q1的发射极接地；三极管Q1的集电极接第五电阻R5的一端；第五电阻R5的另一端接第四电阻R4的一端及单片机104的ELAD管脚；第四电阻R4的另一端接电池组的正极BAT。As shown in Figure 4, the power detection module 102 includes a triode Q1; the base of the triode Q1 is connected to one end of the sixth resistor R6 and the seventh resistor R7; the other end of the sixth resistor R6 is connected to the EL-ctrl pin of the microcontroller 104; The other end of the seven resistors R7 is grounded; the emitter of the triode Q1 is grounded; the collector of the triode Q1 is connected to one end of the fifth resistor R5; the other end of the fifth resistor R5 is connected to one end of the fourth resistor R4 and the ELAD pin of the single chip microcomputer 104; The other end of the fourth resistor R4 is connected to the positive pole BAT of the battery pack.
如图5所示，信号处理模块103包括压力传感器P1、基准电压芯片U1、精密放大器U2和仪表放大器U4；压力传感器P1采用DP10压力传感器；基准电压芯片U1采用REF3325AIDBZR基准电压芯片；精密放大器U2采用OPA333AIDBVR放大器；仪表放大器U4采用INA333A仪表放大器。基准电压芯片U1的1管脚接电容C1的一端及供电模块101的输出端VCC；电容C1的另一端接地；基准电压芯片U1的3管脚接地；基准电压芯片U1的2管脚接单片机104的VREF管脚、精密放大器U2的3管脚及电容C2的一端；电容C2的另一端接地。精密放大器U2的1管脚接压力传感器P1的正电压输入端V+；精密放大器U2的2管脚接地；精密放大器U2的4管脚接第一电阻R1的一端及压力传感器P1的负电压输入端V-；第一电阻R1的另一端接地；精密放大器U2的5管脚接供电模块101的输出端VCC。仪表放大器U4的1管脚经过第三电阻R3与仪表放大器U4的8管脚相连。仪表放大器U4的2管脚接压力传感器P1的电压差信号负端S-；仪表放大器U4的3管脚接压力传感器P1的电压差信号正端S+；仪表放大器U4的4管脚及5管脚均接地。仪表放大器U4的6管脚接第二电阻R2的一端；第二电阻R2的另一端接电容C7的一端及单片机104的AD-pressure管脚；电容C7的另一端接地。仪表放大器U4的7管脚接供电模块101的输出端VCC。As shown in Figure 5, the signal processing module 103 includes a pressure sensor P1, a reference voltage chip U1, a precision amplifier U2 and an instrumentation amplifier U4; the pressure sensor P1 uses a DP10 pressure sensor; the reference voltage chip U1 uses a REF3325AIDBZR reference voltage chip; the precision amplifier U2 uses a OPA333AIDBVR amplifier; instrumentation amplifier U4 adopts INA333A instrumentation amplifier. Pin 1 of the reference voltage chip U1 is connected to one end of the capacitor C1 and the output terminal VCC of the power supply module 101; the other end of the capacitor C1 is grounded; pin 3 of the reference voltage chip U1 is grounded; pin 2 of the reference voltage chip U1 is connected to the microcontroller 104 The VREF pin of the precision amplifier U2 and one end of the capacitor C2; the other end of the capacitor C2 is grounded. Pin 1 of the precision amplifier U2 is connected to the positive voltage input terminal V+ of the pressure sensor P1; pin 2 of the precision amplifier U2 is grounded; pin 4 of the precision amplifier U2 is connected to one end of the first resistor R1 and the negative voltage input terminal of the pressure sensor P1 V-; the other end of the first resistor R1 is grounded; pin 5 of the precision amplifier U2 is connected to the output terminal VCC of the power supply module 101 . Pin 1 of the instrumentation amplifier U4 is connected to pin 8 of the instrumentation amplifier U4 through the third resistor R3. Pin 2 of the instrumentation amplifier U4 is connected to the negative terminal S- of the voltage difference signal of the pressure sensor P1; pin 3 of the instrumentation amplifier U4 is connected to the positive terminal S+ of the voltage difference signal of the pressure sensor P1; pins 4 and 5 of the instrumentation amplifier U4 Both are grounded. Pin 6 of the instrumentation amplifier U4 is connected to one end of the second resistor R2; the other end of the second resistor R2 is connected to one end of the capacitor C7 and the AD-pressure pin of the single-chip microcomputer 104; the other end of the capacitor C7 is grounded. Pin 7 of the instrumentation amplifier U4 is connected to the output terminal VCC of the power supply module 101 .
本实用新型的工作原理如下：The working principle of the utility model is as follows:
供电模块101的原理如下：The principle of the power supply module 101 is as follows:
稳压芯片U3、电感L1和二极管D1组成Boost电路，将电池组提供的电压稳压到3.3V输出。The voltage regulator chip U3, inductor L1 and diode D1 form a Boost circuit to stabilize the voltage provided by the battery pack to 3.3V output.
电量检测模块102的原理如下：The principle of the power detection module 102 is as follows:
当单片机104的EL-ctrl管脚输出高电平时，三极管Q1导通，电池组的正极BAT的电压通过第四电阻R4和第五电阻R5分压的方式，将伏电压输入单片机104的ELAD管脚进行A/D转换。式中，VBAT为电池组的正极BAT的电压值，R4为第四电阻R4的阻值，R5为第五电阻R5的阻值。When the EL-ctrl pin of the single-chip microcomputer 104 outputs a high level, the transistor Q1 is turned on, and the voltage of the positive pole BAT of the battery pack is divided by the fourth resistor R4 and the fifth resistor R5, and the Volts are input to the ELAD pin of the microcontroller 104 for A/D conversion. In the formula, V BAT is the voltage value of the positive pole BAT of the battery pack, R 4 is the resistance value of the fourth resistor R4, and R 5 is the resistance value of the fifth resistor R5.
当单片机104的EL-ctrl管输出低电平时，三极管Q1关闭，单片机104的ELAD管脚的电压为电池组的正极BAT的电压。When the EL-ctrl tube of the single-chip microcomputer 104 outputs a low level, the transistor Q1 is turned off, and the voltage of the ELAD pin of the single-chip microcomputer 104 is the voltage of the positive pole BAT of the battery pack.
信号处理模块103的原理如下：The principle of the signal processing module 103 is as follows:
基准电压芯片U1将供电模块101的输出端VCC的电压转化为基准电压芯片U1的2管脚的电压值，基准电压芯片U1的2管脚的电压值作为单片机104的基准电压，基准电压芯片U1的2管脚与精密放大器U2的3管脚相连，精密放大器U2的4管脚产生一个与基准电压芯片U2的2管脚的电压大小相等的电压。该电压使第一电阻R1上流过电流。The reference voltage chip U1 converts the voltage of the output terminal VCC of the power supply module 101 into the voltage value of the 2 pins of the reference voltage chip U1, and the voltage value of the 2 pins of the reference voltage chip U1 is used as the reference voltage of the single-chip microcomputer 104, and the reference voltage chip U1 The 2 pins of the precision amplifier U2 are connected to the 3 pins of the precision amplifier U2, and the 4 pins of the precision amplifier U2 generate a voltage equal to the voltage of the 2 pins of the reference voltage chip U2. This voltage causes a current to flow through the first resistor R1.
当有压力作用在压力传感器P1上时，压力传感器P1会产生一个电压值；压力传感器P1产生的电压值经仪表放大器U4放大后输出到单片机104的AD-pressure管脚。When there is pressure acting on the pressure sensor P1, the pressure sensor P1 will generate a voltage value; the voltage value generated by the pressure sensor P1 is amplified by the instrument amplifier U4 and then output to the AD-pressure pin of the single-chip microcomputer 104 .
仪表放大器U4输出到单片机104的AD-pressure管脚的电压值V1为The voltage value V 1 of the AD-pressure pin output from the instrumentation amplifier U4 to the single-chip microcomputer 104 is
其中Vs为压力传感器P1产生的电压值，R3为第三电阻R3的阻值。Wherein V s is the voltage value generated by the pressure sensor P1, and R 3 is the resistance value of the third resistor R3.
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Assignee: HANGZHOU ASMIK SENSING TECHNOLOGY Co.,Ltd. Assignor: HANGZHOU SUPMEA AUTOMATION CO.,LTD. Contract record no.: X2025980002424 Denomination of utility model: Pressure detector Granted publication date: 20170804 License type: Common License Record date: 20250122 Assignee: Hangzhou Meiyi Automation Technology Co.,Ltd. Assignor: HANGZHOU SUPMEA AUTOMATION CO.,LTD. Contract record no.: X2025980002422 Denomination of utility model: Pressure detector Granted publication date: 20170804 License type: Common License Record date: 20250122 Assignee: HANGZHOU MEACON AUTOMATION TECHNOLOGY CO.,LTD. Assignor: HANGZHOU SUPMEA AUTOMATION CO.,LTD. Contract record no.: X2025980002421 Denomination of utility model: Pressure detector Granted publication date: 20170804 License type: Common License Record date: 20250122 Assignee: HANGZHOU SINOMEASURE AUTOMATION TECHNOLOGY CO.,LTD. Assignor: HANGZHOU SUPMEA AUTOMATION CO.,LTD. Contract record no.: X2025980002420 Denomination of utility model: Pressure detector Granted publication date: 20170804 License type: Common License Record date: 20250122 Assignee: Hangzhou Fengkong Instrument Co.,Ltd. Assignor: HANGZHOU SUPMEA AUTOMATION CO.,LTD. Contract record no.: X2025980002419 Denomination of utility model: Pressure detector Granted publication date: 20170804 License type: Common License Record date: 20250122 Assignee: Zhejiang Meiyi Intelligent Sensing Technology Co.,Ltd. Assignor: HANGZHOU SUPMEA AUTOMATION CO.,LTD. Contract record no.: X2025980002415 Denomination of utility model: Pressure detector Granted publication date: 20170804 License type: Common License Record date: 20250122 |