CN210981634U - Wireless standard dynamometer device based on machine vision - Google Patents

Abstract

The utility model discloses a wireless standard dynamometer device based on machine vision, contain PCB circuit board, force value sensor, force value vision numerical value identification module and handheld terminal, be equipped with MCU host system, force value signal acquisition module, first wireless bluetooth communication module and second wireless bluetooth communication module on the PCB circuit board, MCU host system is connected with force value signal acquisition module, first wireless bluetooth communication module and second wireless bluetooth communication module electricity respectively; the force value signal acquisition module is further electrically connected with the force value sensor, the force value visual numerical value recognition module is in communication connection with the first wireless Bluetooth communication module, and the handheld terminal is in communication connection with the second wireless Bluetooth communication module. The utility model has the advantages that: the intelligent degree is high, the operation is simple and convenient, the metering staff can conveniently measure in a long distance, the manual action in the metering process is less, and the electronic degree of the metering original record document is improved.

Description

Wireless standard dynamometer device based on machine vision

Technical Field

The utility model relates to a technical field of testing machine power value verification calibration, specific saying so relates to a wireless standard dynamometer device based on machine vision.

Background

Along with the construction and implementation of the national strategy of strong quality, the measurement and detection are increasingly regarded as the key link of quality control of industrial enterprises, and the technical capability requirement of a measurement technical mechanism is higher and higher. The standard device and the matching device are core tools for measurement technology development, and the realization of intellectualization, informatization and even automation of the measurement standard device is a necessary means for improving the efficiency and accuracy of verification and calibration.

At present, various metering technical mechanisms and calibration companies select the following two types of calibration standards for the force value verification of various testing machines: 1. force value sensor + digital display instrument, 2 standard force ring + dial indicator. With the development of technology, the second type of etalon configuration is adopted less and less in metering technical mechanisms, and meanwhile, the configuration of the first type of etalon gradually takes an intelligent instrument or a PC end as a carrier along with the diversification of digital display instruments, but the interaction between sensor signals and the instruments is realized through wired serial port communication. In a certification calibration method, a tester follows a corresponding certification protocol or calibration specification, such as: JJG139-2014 tensile force and pressure and universal tester, JJG 475 one 2008 electronic universal tester, and the like. However, no matter which type of testing machine force value is calibrated or which type of standard device is selected, the manual operation workload of the metrological calibrating personnel is still large, and the following problems can be summarized by summarizing the actual testing machine force value calibration work:

1. when the testing device of the testing machine is far away from the display system, the force value sensor and the display instrument are mainly connected through wired serial port communication, so that the standard value display instrument cannot be placed at one position to be compared with the testing value display system, and the standard value display instrument is inconvenient to read visually.

2. When measurement staff measures, need have personnel to carry out the operation of testing machine, also need carry out the reading record of data simultaneously, lead to measurement work load big, when no personnel cooperate, what the measurement staff need compromise is many.

3. Measurement staff is reading standard indication and when the testing machine shows the indicating value, can not really accomplish to compromise simultaneously and read, leads to the difficult stability of power value when testing machine servo control system precision is not high, and the staff's reading can substitute great error.

4. When a metering worker goes to a consignor to calibrate, the metering worker needs to bring a force value sensor and a display instrument, so that the carrying equipment is excessive. Meanwhile, the display instrument can only display numerical values and does not have the functions of calibrating basic information management, force value data processing and automatic calibration original record forming.

In order to reduce the working intensity of metrological verification personnel, improve the efficiency of verification and calibration and realize the intelligent recording and processing of verification data. The inventor actively researches and innovates and explores a solution scheme based on years of abundant practical experience and professional theoretical knowledge in learning and undertaking metering and instrument technology, so that achievements can serve enterprises, and finally creates a machine vision-based wireless standard dynamometer device with practical value through continuous learning, research and improvement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wireless standard dynamometer device based on machine vision mainly through modules such as force value sensor, force value vision numerical value identification module, MCU host system and handheld terminal, realizes wireless transmission and the management of force value data for solve the big, artifical big scheduling problem of intensity of examining and determine of measuring error that exists among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a wireless standard dynamometer device based on machine vision, contain PCB circuit board, force value sensor, force value vision numerical value identification module and handheld terminal, be equipped with MCU host system, force value signal acquisition module, first wireless bluetooth communication module and second wireless bluetooth communication module on the PCB circuit board, MCU host system is connected with force value signal acquisition module, first wireless bluetooth communication module and second wireless bluetooth communication module electricity respectively;

the force value signal acquisition module is also electrically connected with the force value sensor, the force value visual numerical value recognition module is in communication connection with the first wireless Bluetooth communication module, and the handheld terminal is in communication connection with the second wireless Bluetooth communication module;

the force value sensor is arranged on the testing machine to be tested and used for sensing a tension and pressure value signal of the testing machine to be tested; the force value signal acquisition module is used for acquiring a tension and pressure value signal of the testing machine to be tested, which is sensed by the force value sensor;

the force value visual numerical value identification module is used for identifying and reading the pulling and pressing value numerical value information displayed on the liquid crystal screen of the testing machine to be tested and sending the information to the MCU main control module;

and the MCU master control module is used for receiving the signals acquired and transmitted by the force value sensor and the force value visual numerical value recognition module, performing recognition and operation processing, and transmitting the force value acquisition signals and the numerical value recognition information of the same time sequence after the force of the testing machine to be tested is stabilized into the handheld terminal.

Furthermore, the PCB circuit board is packaged in the control box, the force value sensor, the force value visual numerical value recognition module and the handheld terminal are all arranged outside the control box, the force value sensor is electrically connected with an RS232-DB9 connector embedded on the wall of the control box through a data line, and the RS232-DB9 connector is electrically connected with a force value signal acquisition module arranged on the PCB circuit board through a flat cable.

Further, an ADC module and a 5V to 3.3V level conversion module are arranged on the PCB, the force value signal acquisition module is electrically connected with the ADC module, the ADC module is electrically connected with the 5V to 3.3V level conversion module, and the 5V to 3.3V level conversion module is electrically connected with the MCU main control module;

the ADC module is used for performing analog-to-digital conversion on the tension and pressure value signal of the tester to be tested, which is acquired by the force value signal acquisition module; and the level conversion module for converting 5V to 3.3V is used for converting the signals after analog-to-digital conversion into logic level signals meeting the receiving requirements of the MCU main control module and transmitting the logic level signals to the MCU main control module.

Further, a USB charging interface and a power switch key are embedded on the wall of the control box shell, the USB charging interface is electrically connected with a 5V-to-10V boosting module arranged on a PCB circuit board through a flat cable, and the power switch key is electrically connected with a key control and power management module arranged on the PCB circuit board;

a battery box is also embedded in the control box, two serially connected 3.7V rechargeable lithium batteries are installed in the battery box, the anodes of the two serially connected 3.7V rechargeable lithium batteries are connected with an anode contact arranged on the battery box, the cathodes of the two serially connected 3.7V rechargeable lithium batteries are connected with a cathode contact arranged on the battery box, and the anode contact of the battery box is also electrically connected with a battery electric quantity acquisition and voltage monitoring module, a key control and power management module and an 8.4V lithium battery charging module which are arranged on a PCB circuit board respectively;

the battery electric quantity acquisition and voltage monitoring module and the key control and power management module are electrically connected with the MCU main control module, and the 8.4V lithium battery charging module is also electrically connected with the 5V-to-10V boosting module;

the key control and power management module is also respectively and electrically connected with a 3.3V power supply module and a 5V power supply module, the input ends of the 3.3V power supply module and the 5V power supply module are respectively and electrically connected with the key control and power management module, and the output end of the 3.3V power supply module is respectively and electrically connected with the MCU main control module, the first wireless Bluetooth communication module and the second wireless Bluetooth communication module and used for supplying power to the first wireless Bluetooth communication module, the second wireless Bluetooth communication module and the MCU main control module; the output end of the 5V power supply module is respectively and electrically connected with the ADC module and the force value signal acquisition module and is used for supplying power to the ADC module and the force value signal acquisition module;

and the PCB circuit board is also provided with a system working state indicator light module, and the system working state indicator light module is electrically connected with the MCU main control module.

Further, the force value visual numerical value identification module comprises a CCD pinhole type miniature camera, a numerical signal processing circuit and a third wireless bluetooth module, wherein the numerical signal processing circuit and the third wireless bluetooth module are both packaged inside the CCD pinhole type miniature camera, the CCD pinhole type miniature camera is electrically connected with the numerical signal processing circuit, the numerical signal processing circuit is electrically connected with the third wireless bluetooth module, and the third wireless bluetooth module is in communication connection with the first wireless bluetooth module through a B L E bluetooth wireless transmission protocol.

Furthermore, the force value signal acquisition module consists of an input filter circuit, a differential amplification circuit and an output filter circuit, wherein the input filter circuit and the output filter circuit respectively consist of two first-order RC low-pass filters, the differential amplification circuit consists of two low-noise operational amplifiers with the model number of L TC2057,

the signal input end of the differential amplification circuit is correspondingly connected with the signal output ends of the two input first-order RC low-pass filters of the input filter circuit, and the signal output end of the differential amplification circuit is correspondingly connected with the signal input ends of the two output first-order RC low-pass filters of the output filter circuit;

the signal input ends of two input first-order RC low-pass filters of the input filter circuit are correspondingly and electrically connected with the RS232-DB9 joint;

the signal output ends of two first-order RC low-pass filters of the output filter circuit are correspondingly and electrically connected with the signal input end of the ADC module, and the signal output end of the ADC module is electrically connected with the MCU main control module through a 5V-to-3.3V level conversion module.

Further, the ADC module adopts an analog-to-digital converter with model number L TC 2240;

the 5V to 3.3V level conversion module adopts a 5V to 3.3V bidirectional four-channel logic level converter with the model number of ADG 3304;

the MCU main control module adopts a microcontroller with the model number of STM 8L 151G4U 6.

Furthermore, the system working state indicator light module comprises a red indicator light, a green indicator light and two current-limiting resistors, and the red indicator light and the green L ED indicator light are respectively and correspondingly electrically connected with the MCU main control module through being connected with one current-limiting resistor in series.

Further, the 5V to 10V boost module is a switching power supply boost circuit formed by a boost converter of model number TPS 61089;

the 8.4V lithium battery charging module is a lithium battery charging circuit formed by a lithium battery charging controller with the model number of L TC1731ES 8-8.4;

the 3.3V power supply module adopts a 3V3 power supply circuit formed by a linear voltage regulator with the model number of TPS 70933;

the 5V power supply module adopts a 5V power supply circuit formed by a reference voltage source with the model number of L T1461.

Furthermore, the handheld terminal is a mobile phone or a tablet computer embedded with intelligent force value management application APP software.

The utility model provides a pair of wireless standard dynamometer device's theory of operation process based on machine vision is as follows:

(1) connecting the force value sensor with a RS232-DB9 joint on the control box;

(2) starting a power switch of the control box, starting a camera power supply of the force value visual numerical value identification module, starting force value management application APP software installed on the handheld terminal, respectively pairing the Bluetooth of the control box with the Bluetooth of the handheld terminal, and pairing the Bluetooth of the force value visual numerical value identification module with the Bluetooth of the control box;

(3) clicking a calibration interface of force value management application APP software installed on the handheld terminal, and filling corresponding verification information, wherein the calibration information comprises: the system comprises a consignor, information such as instrument name, model specification, factory number, manufacturer, temperature and humidity, standard name, model specification, name of verification/verifier, verification location and time, verification standard specification and the like;

(4) the novel standard dynamometer device is placed on a working table of a testing machine to be tested;

(5) starting a power switch of the tester to be tested, and controlling software carried by the tester to apply force to the novel standard dynamometer placed on the workbench according to a set point;

(6) the method comprises the steps that a force value visual numerical value identification module is used for identifying a displayed force value of a testing machine to be tested, and a force value sensor is used for sensing an applied force value of the testing machine to be tested;

(7) when the display value variation of the machine to be tested is stabilized within a certain threshold range, the force value is judged to be applied to a set point, the force value visual numerical value recognition module transmits recognized data to the Bluetooth communication module in the control box through the Bluetooth communication module of the force value visual numerical value recognition module, the recognized data are transmitted to the MCU main control module through the Bluetooth communication module in the control box, and in the same time sequence, the force value signal collection module collects a force value signal of the testing machine to be tested, which is sensed by the force value sensor, and the force value signal is transmitted to the MCU main control module after being converted by the ADC module;

(8) the MCU main control module finishes the scheduling processing of the whole data acquisition and transmission work, then the processed data is transmitted to the handheld terminal through the own Bluetooth communication module, the standard force value of the testing machine to be tested, which is measured by the force value sensor, and the display value of the testing machine to be tested, which is identified by the force value visual numerical value identification module, are displayed on the force value intelligent management application APP software interface in the handheld terminal, and the verification/calibration work of the measuring point can be finished by clicking and storing;

(9) carrying out data acquisition work of all measurement points of the tester to be tested according to the steps (1) to (8);

(10) after the test is finished, the report export button on the APP software interface of the intelligent force value management application is clicked, and then the report can be exported in an Excel file for storage.

Compared with the prior art, the utility model discloses an advantage and beneficial effect are:

(1) the automatic collection and reading of the electric signals of the force value sensor by a hardware system are realized through a force value signal collection module;

(2) the value signal is acquired and identified by the value visual value identification module, so that the automatic reading of the value display information of the testing machine is realized;

(3) two power supply voltages are adopted, one is a 3V3 power supply voltage, and the power supply voltages are responsible for supplying power to the MCU main control module and the wireless Bluetooth communication module; the other path is a 5V power supply voltage and is responsible for supplying power to the force value signal acquisition module and the ADC module, so that mutual interference among circuits is reduced;

(4) the management of the basic information of the force value sensor is realized through intelligent force value management application APP software embedded in the handheld terminal, so that a user can conveniently and directly call the force value sensor in an application program when calibrating the force value sensor, the management of the verification/calibration basic information of the tested testing machine is realized, the lookup and the use of historical information are facilitated, and meanwhile, the automatic generation of an electronic document of the original record of the force value information of the testing machine can be realized;

the utility model has the advantages of intelligent degree is high, operation simple accurate, the effectual measurement staff that has solved can not remotely measure work, measurement process manual action more, measure the not high scheduling problem of original record electronization document degree.

Drawings

Fig. 1 is a schematic diagram of the hardware structure of the present invention;

fig. 2 is a schematic block diagram of the circuit structure of the present invention;

FIG. 3 is a circuit configuration of the force signal acquisition module of FIG. 2;

FIG. 4 is a circuit configuration of the ADC module shown in FIG. 2;

FIG. 5 is a circuit configuration of the 5V to 3.3V level shift module of FIG. 2;

FIG. 6 is a circuit configuration example of the MCU master control module in FIG. 2 connected to the system operation status indicator light module;

FIG. 7 is a circuit configuration of the first wireless Bluetooth communication module, the second wireless Bluetooth communication module, or the third wireless Bluetooth communication module in FIG. 2;

FIG. 8 is a circuit configuration of the battery level collection and voltage monitoring module of FIG. 2;

FIG. 9 is a circuit configuration embodiment of the keyswitch control and power management module of FIG. 2;

FIG. 10 is a circuit configuration of the 3.3V power module of FIG. 2;

FIG. 11 is a circuit configuration of the 5V power supply module of FIG. 2;

FIG. 12 is a schematic diagram of an embodiment of a circuit configuration of the 8.4V lithium battery charging module of FIG. 2;

FIG. 13 is a circuit configuration of the 5V to 10V boost module of FIG. 2;

in the figure: 1. a PCB circuit board; 2. a force value sensor; 3. a force value visual numerical value identification module; 4. a handheld terminal; 5. a control box; 6. an RS232-DB9 linker; 7. a USB charging interface; 8. a power switch key; 9. a battery case; 10. a 3.7V rechargeable lithium battery; 11. a force value signal acquisition module; 11.1, inputting a filter circuit; 11.2, a differential amplifying circuit; 11.3, an output filter circuit; 12. an ADC module; 13. a 5V to 3.3V level conversion module; 14. the MCU master control module; 15. a first wireless Bluetooth communication module; 16. a second wireless Bluetooth communication module; 17. a system working state indicator light module; 18. the battery electric quantity acquisition and voltage monitoring module; 19. the key switch control and power management module; 20. a 3.3V power supply module; 21. a 5V power supply module; 22. 8.4V lithium battery charging module; 23. 5V changes 10V boost module.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, how to implement the present invention is further explained below with reference to the accompanying drawings and the detailed description.

As shown in fig. 1 and fig. 2, the utility model provides a wireless standard force measuring instrument device based on machine vision, which comprises a PCB circuit board 1, a force value sensor 2, a force value visual numerical value recognition module 3 and a hand-held terminal 4, wherein the PCB circuit board 1 is provided with a MCU master control module 14, a force value signal acquisition module 11, an ADC module 12, a 5V to 3.3V level conversion module 13, a first wireless bluetooth communication module 15 and a second wireless bluetooth communication module 16, the PCB circuit board 1 is packaged in a control box 5, the force value sensor 2, the force value visual numerical value recognition module 3 and the hand-held terminal 4 are all arranged outside the control box 5, the force value sensor 2 is electrically connected with an RS232-DB9 joint 6 embedded on the wall of the control box 5 through a data line, the RS232-DB9 joint 6 is electrically connected with the force value signal acquisition module 11 arranged on the PCB circuit board 1 through a flat cable, the force value signal acquisition module 11 is electrically connected with the ADC module 12, the ADC module 12 is electrically connected with the 5V-to-3.3V level conversion module 13, and the 5V-to-3.3V level conversion module 13 is electrically connected with the MCU main control module 14; the force value visual numerical value recognition module 3 is in communication connection with a first wireless Bluetooth communication module 15 arranged on the PCB circuit board 1, the handheld terminal 4 is in communication connection with a second wireless Bluetooth communication module 16 arranged on the PCB circuit board 1, and the first wireless Bluetooth communication module 15 and the second wireless Bluetooth communication module 16 are both electrically connected with an MCU main control module 14 arranged on the PCB circuit board 1.

The force value sensor 2 is arranged on the testing machine to be tested and used for sensing a tension and pressure value signal of the testing machine to be tested; the force value signal acquisition module 11 is used for acquiring a pulling pressure value signal of the machine to be tested, which is sensed by the force value sensor 2, and transmitting the pulling pressure value signal to the ADC module 12;

the ADC module 12 is used for performing analog-to-digital conversion on the tension and pressure value signal of the tester to be tested, which is acquired by the force value signal acquisition module 11;

and the level conversion module 13 for converting 5V to 3.3V is used for converting the signal after the analog-to-digital conversion of the ADC module 12 into a logic level signal meeting the receiving requirement of the MCU main control module 14 and transmitting the logic level signal to the MCU main control module 14.

The force value visual numerical value identification module 3 is used for identifying and reading the pulling and pressing force value numerical value information displayed on the liquid crystal screen of the testing machine to be tested and sending the information to the MCU main control module 14;

and the MCU master control module 14 is used for receiving the signals acquired and transmitted by the force value sensor 2 and the force value visual numerical value identification module 3, carrying out identification and operation processing, and transmitting the force value acquisition signals and the numerical value identification information of the same time sequence after the force of the testing machine to be tested is stabilized to the handheld terminal 4 through the second wireless Bluetooth communication module 16.

As shown in fig. 1, a USB charging interface 7 and a power switch key 8 are further embedded on the wall of the control box 5, the USB charging interface 7 is electrically connected with a 5V to 10V boost module 23 arranged on the PCB 1 through a flat cable, and the power switch key 8 is electrically connected with a key control and power management module 19 arranged on the PCB 1;

a battery box 9 is also embedded in the control box 5, two series-connected 3.7V rechargeable lithium batteries 10 are installed in the battery box 9, the anodes of the two series-connected 3.7V rechargeable lithium batteries 10 are connected with the anode contact arranged on the battery box 9, the cathodes of the two series-connected 3.7V rechargeable lithium batteries 10 are connected with the cathode contact arranged on the battery box 9, and the anode contact of the battery box 9 is also electrically connected with a battery electric quantity acquisition and voltage monitoring module 18, a key control and power management module 19 and an 8.4V lithium battery charging module 22 which are arranged on the PCB circuit board 1 respectively; the battery electric quantity acquisition and voltage monitoring module 18 and the key control and power management module 19 are electrically connected with the MCU master control module 14, and the 8.4V lithium battery charging module 22 is electrically connected with the 5V-to-10V boosting module 23;

the key control and power management module 19 is also electrically connected with the 3.3V power supply module 20 and the 5V power supply module 21 respectively, the input ends of the 3.3V power supply module 20 and the 5V power supply module 21 are electrically connected with the key control and power management module 19, and the output end of the 3.3V power supply module 20 is electrically connected with the MCU main control module 14, the first wireless Bluetooth communication module 15 and the second wireless Bluetooth communication module 16 respectively and is used for supplying power to the first wireless Bluetooth communication module 15, the second wireless Bluetooth communication module 16 and the MCU main control module 14; the output end of the 5V power supply module 21 is electrically connected with the AD module 12 and the force value signal acquisition module 11 respectively, and is used for supplying power to the ADC module 12 and the force value signal acquisition module 11;

as shown in fig. 2, a system working state indicator light module 17 is further disposed on the PCB circuit board 1, and the system working state indicator light module 17 is connected to the MCU main control module 14.

In the utility model, the 3.3V power supply module 20 is responsible for supplying power to the first wireless bluetooth communication module 15, the second wireless bluetooth communication module 16 and the MCU main control module 12;

the 5V power supply module 21 is used for supplying power to the ADC module 12 and the force value signal acquisition module 11;

an 8.4V lithium battery charging module 22 for supplying charging power to two series-connected 3.7V rechargeable lithium batteries 10 in the battery box 9;

the 5V-to-10V boosting module 23 is used for providing charging voltage for the 8.4V lithium battery charging module 22;

the key switch control and power management module 19 is used for controlling the MCU master control module 14, the 3.3V power supply module 20 and the 5V power supply module 21 to work;

the system working state indicator light module 17 is used for monitoring the running state of the system;

and the battery electric quantity acquisition and voltage monitoring module 18 is used for monitoring the electric quantity of the battery and the power supply voltage.

As a preferred embodiment of the utility model, the force value vision numerical value identification module 3 comprises a CCD pinhole type miniature camera, a numerical signal processing circuit and a third wireless Bluetooth module, the numerical signal processing circuit and the third wireless Bluetooth module are all packaged inside the CCD pinhole type miniature camera, the CCD pinhole type miniature camera is electrically connected with the numerical signal processing circuit, the numerical signal processing circuit is electrically connected with the third wireless Bluetooth module, the third wireless Bluetooth module is in communication connection with the first wireless Bluetooth module 15 through a B L E Bluetooth wireless transmission protocol, the first wireless Bluetooth module 15, the second wireless Bluetooth module 16 and the third wireless Bluetooth module all adopt a low-power B L E Bluetooth module with a model of HJ-580DA14580, the circuit structure of the low-power B L E Bluetooth module with the model of HJ-580DA14580 is shown in figure 7, the numerical signal processing circuit is a numerical value identification signal processing circuit with the CCD pinhole type miniature camera, the CCD pinhole type miniature camera is a miniature camera universal in the market, the visual value vision numerical value identification module 3 is used for reading the pressure identification information of the wireless camera connected with the wireless Bluetooth module to be tested through a pressure identification screen, and the wireless Bluetooth module is connected with the pressure identification module, and the wireless Bluetooth module is connected with the pressure identification module to be tested.

As a preferred example of the present invention, as shown in FIG. 3, the force signal collecting module 11 comprises an input filter circuit 11.1, a differential amplifier circuit 11.2 and an output filter circuit 11.3, wherein the input filter circuit 11.1 and the output filter circuit 11.3 respectively comprise two first-order RC low-pass filters, the differential amplifier circuit 11.2 comprises two low-noise operational amplifiers with model number L TC2057, the signal input terminals of the differential amplifier circuit 11.2 are correspondingly connected with the signal output terminals of the two input first-order RC low-pass filters of the input filter circuit 11.1, the signal output terminals of the differential amplifier circuit 11.2 are correspondingly connected with the signal input terminals of the two output first-order RC low-pass filters of the output filter circuit 11.3, the signal input terminals of the two input first-order RC low-pass filters of the input filter circuit 11.1 are correspondingly electrically connected with the RS232-DB9 connector 6, the signal output terminals of the two output first-order RC low-pass filters of the output filter circuit 11.3 are correspondingly electrically connected with the signal input terminal of the ADC module 12, and the signal output terminal of the MCU level converting module 12 is electrically connected with the level converting module 14.3,

as a preferred embodiment of the present invention:

as shown in fig. 4, the ADC module 12 employs an analog-to-digital converter model L TC2240, which is specifically composed of an integrated circuit U7 model L TC 2240;

as shown in fig. 5, the 5V to 3.3V level conversion module 13 is a 5V to 3.3V bidirectional four-channel logic level converter of the type ADG3304, and is specifically composed of an integrated circuit U6 of the type ADG 3304;

as shown in fig. 6, the MCU master control module 14 adopts a microcontroller of model STM 8L 151G4U6 and is composed of an integrated circuit U5 of model STM 8L 151G4U 6;

the system working state indicator light module 17 comprises a red indicator light, a green indicator light and two current-limiting resistors, wherein the red indicator light and the green L ED indicator light are respectively and electrically connected with the MCU main control module 14 by connecting a current-limiting resistor in series, as shown in FIG. 6, the system working state indicator light module specifically comprises a red light emitting diode D8, a green light emitting diode D9, a 1K +/-5% current-limiting resistor R25 and a 1K +/-5% current-limiting resistor R26;

as shown in fig. 7, the first wireless bluetooth module 15, the second wireless bluetooth module 16 and the third wireless bluetooth module are all bluetooth low energy B L E modules with model number HJ-580DA 14580;

as shown in fig. 8, the battery power collecting and voltage monitoring module 16 is a battery power collecting and voltage monitoring circuit formed by connecting 8050 a triode Q5, 200K ± 1% of a resistor R14, 100K ± 1% of a resistor R15, and 1K ± 1% of a resistor R16, 8.4V is that the positive input end of the battery power is connected to one end of the resistor R14, the resistor R14 and the resistor R15 are proportional resistors and are respectively connected to the collector and the emitter of the triode Q5, one end of the resistor R16 is connected to the base of the triode Q5, the other end of the resistor R16 is connected to an output port BAT _ SIG _ CTR in the MCU main control module 14, the MCU main control module 14 controls whether the triode Q5 is turned on or not by controlling the output port BAT _ SIG _ CTR, when the battery power voltage needs to be measured, the BAT _ SIG _ CTR outputs high power, and the triode Q5 is turned on; when measurement is not needed, the BAT _ SIG _ CTR outputs a low level, the triode Q5 is turned off, and therefore the purpose of reducing system power consumption is achieved, a battery voltage signal BAT _ SIG output by the triode Q5 is connected with an input port BAT _ SIG in the MCU main control module 14;

as shown in fig. 9, the key switch control and power management module 17 is a key switch control and power management circuit formed by connecting a pin socket JP1, a diode D1 of MBR0520, a diode D2 of MBR0520, a diode D3 of MBR0520, a resistor R3 of 1M ± 1%, a resistor R4 of 450K ± 1%, a resistor R5 of 1K ± 1%, a power switch Q1 of Si2323DS, and a triode Q2 of 8050; 8.4V is that the positive input end of a battery power supply is connected to the pin of a diode D1, the pin of the diode D1 is respectively connected with the S pole of a power switch Q1 and one end of a resistor R3, the other end of the resistor R3 is respectively connected with the G pole of a power switch Q1, the pin of a diode D3 and the collector of a triode Q2, the cathode of the diode D3 and the pin of a diode D2 are jointly connected with the input pin of a pin socket JP1, the pin of the diode D3 is connected to the output port PWR _ KEY of the MCU main control module 14 through internal circuit wiring, the base of the triode Q2 is connected to the output port PWR _ CTR of the MCU main control module 14 through a resistor R5 through an internal circuit, the emitter of the wiring of the triode Q2 is grounded through a resistor R4, a signal POWER _ OUT output by a D pole of the POWER switch tube Q1 is respectively connected to the input ends of the 3.3V POWER supply module 20 and the 5V POWER supply module 21 through internal circuit wires;

as shown in fig. 10, the 3.3V power supply module 20 adopts a 3V3 power supply circuit formed by a linear regulator of model number TPS70933, and specifically includes an integrated circuit U3 of model number TPS70933, capacitors C3 and C4 of capacitors C3 and 104 of 1.0nF, and capacitors C5 of capacitors C5 and C6 of capacitors 104 of 1.0 nF;

as shown in fig. 11, the 5V power supply module 21 is a 5V power supply circuit formed by a reference voltage source with model number L T1461, and specifically includes an integrated circuit U4 with model number L T1461, capacitors C7 and C8 of capacitors C7 and 104 of 1.0nF, and capacitors C9 of capacitors C9 and C10 of capacitors 104 of 1.0 nF;

as shown in fig. 12, the 8.4V lithium battery charging module 22 is a lithium battery charging circuit formed by a lithium battery charging controller with model number L TC1731ES8-8.4, and specifically comprises L TC1731ES8-8.4 integrated circuit U2, 10K ± 1% of resistor R6, 10K ± 1% of resistor R8, 0.05R ± 1% of resistor RS1, 19.6K ± 1% of resistor R13, diode D4 of MBRM120T3, light emitting diode D5, triode Q3 of ZTX749, triode Q4 of 2N5087, capacitor CT1 of 100nF, capacitor C11 of 10 μ F, capacitor C17 of 1nF, and capacitor C19 of 10 μ F;

as shown in fig. 13, the 5V to 10V boost module 23 is a switching power supply boost circuit formed by a boost converter of the model number TPS61089, and specifically includes a resistance R7 of the model number TPS61089 integrated circuit U1, 681K ± 1%, a resistance R9 of 301K ± 1%, a resistance R10 of 107K ± 1%, a resistance R11 of 17.4K ± 1%, a resistance R12 of 127K ± 1%, a capacitance C12 of 22 μ F, a capacitance C13 of 22 μ F, a capacitance C14 of 2.2 μ F, a capacitance C15 of 22 μ F, a capacitance C16 of 100nF, a capacitance C18 of 2.2 μ F, a capacitance C20 of 2.2 μ F, a capacitance C21 of 4.7nF, an inductance L of 1.8 μ H, and a diode D6 of MBRM120T 3.

The force value sensor 2 is a bridge type pulling pressure sensor;

the handheld terminal 4 is a mobile phone or a tablet computer embedded with intelligent force value management application APP software.

The utility model provides a pair of wireless standard dynamometer device's theory of operation based on machine vision specifically as follows:

(1) connecting the force value sensor 2 with a RS232-DB9 joint 6 on the control box 5;

(2) starting a power switch key 8 of the control box 5, simultaneously starting a CCD pinhole type micro camera power supply of the power value visual numerical value identification module 3 and starting power value intelligent management application APP software installed on the handheld terminal 4, pairing a second wireless Bluetooth communication module 16 in the control box 5 with a Bluetooth communication module in the handheld terminal 4, and pairing a third wireless Bluetooth communication module in the power value visual numerical value identification module 3 with a first wireless Bluetooth communication module 15 in the control box 5;

(3) click the calibration interface of the power value intelligent management application APP software installed on the handheld terminal 4, fill in corresponding verification information, contain: the system comprises a consignor, information such as instrument name, model specification, factory number, manufacturer, temperature and humidity, standard name, model specification, name of verification/verifier, verification location and time, verification standard specification and the like;

(4) the novel standard dynamometer device is placed on a working table of a testing machine to be tested;

(5) starting a power switch of a testing machine to be tested, and controlling software carried by the testing machine to apply force to the novel standard dynamometer placed on the workbench according to a set point;

(6) the force value visual numerical value identification module 3 is used for identifying the force value displayed on the testing machine to be tested, and the force sensor 2 is used for sensing the force value applied to the testing machine to be tested;

(7) when the display value variation of the machine to be tested is stabilized within a certain threshold range, the force value is judged to be applied to the set point, the force value numerical data recognized by the force value visual numerical value recognition module 3 is transmitted to the first wireless Bluetooth communication module 15 in the control box 5 through the third wireless Bluetooth communication module, then the first wireless Bluetooth communication module 15 in the control box 5 transmits the force value numerical data recognized by the force value visual numerical value recognition module 3 to the MCU main control module 14, and simultaneously in the same time sequence, the force value signal acquisition module 11 transmits the force value signal of the machine to be tested, which is sensed by the force value sensor 2, to the MCU main control module 14 through the ADC module 12 and the level conversion module 13 for converting 5V into 3.3V;

(8) the MCU main control module 14 finishes the scheduling processing of the whole data acquisition and transmission work, then the processed data is transmitted to the handheld terminal 4 through the second wireless Bluetooth communication module 16 of the MCU main control module, the standard force value of the machine to be tested sensed and measured by the force value sensor 2 and the display value of the machine to be tested and identified by the force value visual numerical value identification module 3 are displayed on the force value intelligent management application APP software interface in the handheld terminal 4, and finally the verification/calibration work of the measuring point can be finished by clicking and storing;

(9) carrying out data acquisition work of all measurement points of the tester to be tested according to the steps (1) to (8);

(10) after the test is finished, the report export button on the APP software interface of the intelligent force value management application is clicked, and then the report can be exported in an Excel file for storage.

In the prior art, the present applicant (the institute of metering and testing technologies in north of huh) has disclosed the computer program related to the middle force value intelligent management application APP software of the present invention in the computer software whose software name is the intelligent dynamometer system V1.0 was developed and completed in 12/1/2018 and published in 4/1/2019.

Finally, the above description is only the embodiments of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. A wireless standard dynamometer device based on machine vision, characterized in that: the force value identification system comprises a PCB (printed circuit board) 1, a force value sensor 2, a force value visual numerical value identification module 3 and a handheld terminal 4, wherein an MCU (microprogrammed control unit) main control module 14, a force value signal acquisition module 11, a first wireless Bluetooth communication module 15 and a second wireless Bluetooth communication module 16 are arranged on the PCB 1, and the MCU main control module 14 is respectively and electrically connected with the force value signal acquisition module 11, the first wireless Bluetooth communication module 15 and the second wireless Bluetooth communication module 16;

the force value signal acquisition module (11) is also electrically connected with the force value sensor (2), the force value visual numerical value recognition module (3) is in communication connection with the first wireless Bluetooth communication module (15), and the handheld terminal (4) is in communication connection with the second wireless Bluetooth communication module (16);

the force value sensor (2) is arranged on the testing machine to be tested and used for sensing a pulling and pressing force value signal of the testing machine to be tested; the force value signal acquisition module (11) is used for acquiring a tension and pressure value signal of the testing machine to be tested, which is sensed by the force value sensor (2);

the force value visual numerical value recognition module (3) is used for recognizing and reading the pulling and pressing force value numerical value information displayed on the liquid crystal screen of the testing machine to be tested and sending the information to the MCU main control module (14);

and the MCU master control module (14) is used for receiving signals acquired and transmitted by the force value sensor (2) and the force value visual numerical value identification module (3), carrying out identification and operation processing, and transmitting the force value acquisition signals and the numerical value identification information of the same time sequence after the force of the testing machine to be tested is stabilized to the handheld terminal (4).

2. The machine-vision-based wireless standard load cell device of claim 1, wherein: PCB circuit board (1) encapsulates in control box (5), power value sensor (2), power value vision numerical value recognition module (3) and handheld terminal (4) all set up outside control box (5), just power value sensor (2) pass through the data line and inlay and establish RS232-DB9 on control box (5) conch wall connects (6) the electricity and is connected, RS232-DB9 connects (6) and is connected with power value signal acquisition module (11) electricity that set up on PCB circuit board (1) through the winding displacement.

3. The machine-vision-based wireless standard load cell device of claim 2, wherein: the PCB circuit board (1) is further provided with an ADC (analog to digital converter) module (12) and a 5V to 3.3V level conversion module (13), the force value signal acquisition module (11) is electrically connected with the ADC module (12), the ADC module (12) is electrically connected with the 5V to 3.3V level conversion module (13), and the 5V to 3.3V level conversion module (13) is electrically connected with an MCU (microprogrammed control unit) main control module (14);

the ADC module (12) is used for performing analog-to-digital conversion on the tension and pressure value signal of the tester to be tested, which is acquired by the force value signal acquisition module (11); and the level conversion module (13) for converting 5V to 3.3V is used for converting the signals after analog-to-digital conversion into logic level signals meeting the receiving requirements of the MCU main control module (14) and transmitting the logic level signals to the MCU main control module (14).

4. The machine-vision-based wireless standard load cell device of claim 3, wherein: a USB charging interface (7) and a power switch key (8) are further embedded on the shell wall of the control box (5), the USB charging interface (7) is electrically connected with a 5V-to-10V boosting module (23) arranged on the PCB (1) through a flat cable, and the power switch key (8) is electrically connected with a key control and power management module (19) arranged on the PCB (1);

a battery box (9) is further embedded in the control box (5), two serially connected 3.7V rechargeable lithium batteries (10) are mounted in the battery box (9), the anodes of the two serially connected 3.7V rechargeable lithium batteries (10) are connected with an anode contact arranged on the battery box (9), the cathodes of the two serially connected 3.7V rechargeable lithium batteries (10) are connected with a cathode contact arranged on the battery box (9), and the anode contact of the battery box (9) is also electrically connected with a battery electric quantity acquisition and voltage monitoring module (18), a key control and power management module (19) and an 8.4V lithium battery charging module (22) which are arranged on the PCB circuit board (1) respectively;

the battery electric quantity acquisition and voltage monitoring module (18) and the key control and power management module (19) are electrically connected with the MCU main control module (14), and the 8.4V lithium battery charging module (22) is also electrically connected with the 5V-to-10V boosting module (23);

the key control and power management module (19) is also respectively and electrically connected with a 3.3V power supply module (20) and a 5V power supply module (21), the input ends of the 3.3V power supply module (20) and the 5V power supply module (21) are respectively and electrically connected with the key control and power management module (19), and the output end of the 3.3V power supply module (20) is respectively and electrically connected with the MCU master control module (14), the first wireless Bluetooth communication module (15) and the second wireless Bluetooth communication module (16) and is used for supplying power to the first wireless Bluetooth communication module (15), the second wireless Bluetooth communication module (16) and the MCU master control module (14); the output end of the 5V power supply module (21) is respectively and electrically connected with the ADC module (12) and the force value signal acquisition module (11) and is used for supplying power to the ADC module (12) and the force value signal acquisition module (11);

the PCB circuit board (1) is further provided with a system working state indicator lamp module (17), and the system working state indicator lamp module (17) is electrically connected with the MCU main control module (14).

5. The machine vision-based wireless standard force measuring instrument device according to claim 1 or 2, wherein the force value vision numerical value identification module (3) comprises a CCD pinhole micro-camera, a numerical signal processing circuit and a third wireless Bluetooth module, the numerical signal processing circuit and the third wireless Bluetooth module are packaged inside the CCD pinhole micro-camera, the CCD pinhole micro-camera is electrically connected with the numerical signal processing circuit, the numerical signal processing circuit is electrically connected with the third wireless Bluetooth module, and the third wireless Bluetooth module is in communication connection with the first wireless Bluetooth module (15) through a B L E Bluetooth wireless transmission protocol.

6. The machine vision based wireless standard force measuring instrument device according to claim 3, wherein the force value signal acquisition module (11) is composed of an input filter circuit (11.1), a differential amplifier circuit (11.2) and an output filter circuit (11.3), the input filter circuit (11.1) and the output filter circuit (11.3) are respectively composed of two first-order RC low-pass filters, the differential amplifier circuit (11.2) is composed of two low-noise operational amplifiers with model number L TC2057,

the signal input end of the differential amplification circuit (11.2) is correspondingly connected with the signal output ends of two input first-order RC low-pass filters of the input filter circuit (11.1), and the signal output end of the differential amplification circuit (11.2) is correspondingly connected with the signal input ends of two output first-order RC low-pass filters of the output filter circuit (11.3);

the signal input ends of two input first-order RC low-pass filters of the input filter circuit (11.1) are correspondingly and electrically connected with a connector (6) of RS232-DB 9;

the signal output ends of two first-order RC low-pass filters of the output filter circuit (11.3) are correspondingly and electrically connected with the signal input end of the ADC module (12), and the signal output end of the ADC module (12) is electrically connected with the MCU main control module (14) through a 5V to 3.3V level conversion module (13).

7. The machine-vision-based wireless reference load cell device according to claim 3, wherein said ADC module (12) employs an analog-to-digital converter model L TC 2240;

the 5V to 3.3V level conversion module (13) adopts a 5V to 3.3V bidirectional four-channel logic level converter with the model number of ADG 3304;

the MCU main control module (14) adopts a microcontroller with the model number of STM 8L 151G4U 6.

8. The wireless standard force measuring device based on machine vision according to claim 4, wherein the system working state indicator light module (17) comprises a red indicator light, a green indicator light and two current limiting resistors, and the red indicator light and the green L ED indicator light are respectively and correspondingly electrically connected with the MCU master control module (14) by connecting one current limiting resistor in series.

9. The machine-vision-based wireless standard load cell device of claim 4, wherein: the 5V-to-10V boosting module (23) is a switching power supply boosting circuit formed by a boosting converter with the model number of TPS 61089;

the 8.4V lithium battery charging module (22) is a lithium battery charging circuit formed by a lithium battery charging controller with the model number of L TC1731ES 8-8.4;

the 3.3V power supply module (20) adopts a 3V3 power supply circuit formed by a linear voltage regulator with the model number of TPS 70933;

the 5V power supply module (21) adopts a 5V power supply circuit formed by a reference voltage source with the model number of L T1461.

10. The machine-vision-based wireless standard load cell device of claim 1, wherein: the handheld terminal (4) is a mobile phone or a tablet personal computer embedded with intelligent force value management application APP software.

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