CN216449672U

CN216449672U - Automatic change tongue tube electrical parameter measuring apparatu

Info

Publication number: CN216449672U
Application number: CN202123043021.6U
Authority: CN
Inventors: 黄海涛; 宋春华
Original assignee: Xihua University
Current assignee: Xihua University
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-05-06
Anticipated expiration: 2031-12-07

Abstract

The utility model discloses an automatic reed switch electrical parameter measuring instrument, and mainly relates to an electrical parameter tester for measuring a reed switch attraction coefficient, a return coefficient and contact resistance. The device comprises a communication module, a power module, a single chip microcomputer chip module, a display module, a d/a test module, a reed pipe module, a photosensitive module and an a/d converter. The d/a testing module comprises a d/a converter, an operational amplifier and a coil, the output end of the operational amplifier is connected with one end of the coil and used for triggering the reed switch to be switched on and off, the reed switch module comprises led light-emitting diodes and a reed switch, the led light-emitting diodes are used for emitting light signals, the single chip microcomputer receives signals to trigger the a/d converting module to collect voltage values, and the a/d converting module is used for testing the voltage values at two ends of the reed switch in the reed switch module. The beneficial effects of the utility model are as follows: the device can realize automatic measurement, improves the measurement efficiency, has small error and reliable result.

Description

Automatic change tongue tube electrical parameter measuring apparatu

Technical Field

The utility model relates to an automatic reed switch electrical parameter measuring instrument, in particular to a measuring instrument for measuring a reed switch attraction coefficient, a return coefficient and contact resistance.

Background

The parameters of the reed pipe, such as the suction coefficient, the return coefficient and the contact resistance, are very important, and the performance of the reed pipe is directly influenced.

The traditional reed switch electrical performance parameter measuring method mainly comprises the steps of measuring by using a voltmeter and an ammeter, slowly increasing the voltage at two ends of a coil in a mode of manually adjusting a power supply, directly reading a voltage value and a current value when the reed switch is conducted, and then calculating related electrical performance parameters.

Disclosure of Invention

In order to solve the above-mentioned defects, the present invention aims to provide an automatic reed switch electrical parameter measuring instrument.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the utility model provides a tongue tube electrical parameter measuring apparatu which characterized in that: the dry reed pipe module comprises a light emitting diode, the conduction voltage drop of the light emitting diode is 3V, one end of the light emitting diode is connected with a resistor R2, the R2 is 120 omega, the other end of the light emitting diode is connected with a dry reed pipe to be detected, one end of the dry reed pipe is connected with a power supply, the other end of the resistor R2 is grounded, the d/a conversion module comprises a d/a converter, the output end of the d/a converter is connected with an operational amplifier, the output end of the operational amplifier is connected with the cathode of a fly-wheel diode and one end of a coil, the anode of the fly-wheel diode is grounded, the fly-wheel diode is used for smoothing current, the number of turns of the coil is 500, one end of the connected resistor R1 is 35 omega, and the other end of the resistor is grounded. Further comprising: the input device is a key and is mainly used for providing a conversion signal. And the output equipment is used for displaying the converted parameters sent by the singlechip chip. and the measuring end of the a/d converter is connected with two ends of the reed pipe to be measured and is used for measuring the voltage at the two ends of the reed pipe. And the photosensitive module is used for receiving optical signals sent by the light emitting diode, the anode of the photosensitive diode in the photosensitive module is connected with the ground, and the cathode GM is connected with the IO port of the single chip microcomputer chip. And the communication module is used for downloading programs, uploading data to a PC (personal computer) and uploading the data to a mobile phone APP (application), the communication module is connected with the interface of the single chip microcomputer chip in a serial port mode, and the communication module is connected with the PC in a USB (universal serial bus) mode. And the power supply module is used for supplying electric energy to each element of the tester.

Further, the above reed pipe electrical parameter measuring instrument, wherein: the display device is an LCD display.

Further, the above reed switch electrical parameter measuring instrument, wherein: the communication module (8) further comprises Bluetooth and is used for uploading the converted data to a mobile phone APP.

Further, the above reed switch electrical parameter measuring instrument, wherein: the reed switch (51) to be tested is placed in the center of the coil (64).

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model mainly measures the voltage at two ends of a reed switch in a reed switch module through an A/D converter; the D/A conversion module is realized by a program to enable the coil voltage to gradually drop from high, the reed switch is disconnected after the coil voltage reaches a certain value (the value is da 1), the light-emitting diode is turned off, the photosensitive module outputs high level to the single chip microcomputer chip, when the single chip microcomputer recognizes the high level and records the value, the coil voltage is 0, the reed switch is closed after the voltage gradually rises from 0 to the certain value (the value is da 2), the light-emitting diode is turned on, the photosensitive module outputs low level to the single chip microcomputer chip, and when the single chip microcomputer recognizes the high level, the value is recorded. The process can be automatically completed only by pressing the key, and the method replaces complicated manual measurement, so that the efficiency is improved, and the precision is guaranteed.

2. The utility model is provided with an LCD display, and the display is connected with a singlechip chip. After the single chip microcomputer receives and processes the data, the data are transmitted to the LCD, the data are displayed through the LCD, manual operation is replaced by a processor operation mode, and the measuring efficiency is improved.

3. The communication module comprises the Bluetooth module and is used for uploading the converted data to the mobile phone, so that the measurement at any time and anywhere is realized, and the measurement result can be checked only by the mobile phone.

Drawings

Fig. 1 is a general structural view of the present invention.

FIG. 2 is a diagram of a dry reed pipe module, a photosensitive module, and a d/a conversion module according to the present invention.

The reference numbers in the drawings: 1. a single chip microcomputer chip; 2. a communication module; 3. an a/d conversion module; 4. a photosensitive module; 5. a dry reed pipe module; 6. a d/a converter; 7. a display module; 8. a communication module; 41. a photodiode; 51. a reed switch to be tested; 52. a light emitting diode; 61. a d/a converter; 62. an operational amplifier; 63. a freewheeling diode; 64. and a coil.

Detailed Description

The utility model will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

The utility model relates to a reed switch electrical parameter measuring instrument, which is characterized in that: the dry reed pipe module (5) comprises a dry reed pipe module (5) and a d/a conversion module (6), the dry reed pipe module (5) comprises a light emitting diode (52), the conduction voltage drop of the light emitting diode (52) is 3V, one end of the light emitting diode (52) is connected with a resistor R2, the R2 is 120 omega, the other end of the light emitting diode is connected with a dry reed pipe (51) to be detected, one end of the dry reed pipe (51) is connected with a power supply, the other end of the resistor R2 is grounded, the d/a conversion module (6) comprises a d/a converter (61), the output end of the d/a converter (61) is connected with an operational amplifier (62), the output end of the operational amplifier (62) is connected with the cathode of a freewheeling diode (63) and one end of a coil (64), the anode of the freewheeling diode (63) is grounded, the freewheeling diode (63) is used for smoothing current, the number of turns of the coil (64) is 500 turns, and one end of the resistor R1 is 35 omega, the other end of the resistor is grounded. Further comprising: the input device is a key and is mainly used for providing a conversion signal. And the output device is used for displaying the converted parameters sent by the single chip (1). and the measuring end of the a/d converter (3) is connected with two ends of the reed pipe (51) to be measured and is used for measuring the voltage at the two ends of the reed pipe. The photosensitive module (4) is used for receiving optical signals sent by the light emitting diode (52), the anode of the photosensitive diode in the photosensitive module (4) is connected with the ground, and the cathode GM is connected with the IO port of the single chip microcomputer chip (1). And the communication module (2) is used for downloading programs, uploading data to a PC (personal computer) and uploading the data to a mobile phone APP, the communication module (8) is connected with the interface of the single chip (1) in a serial port mode, and the communication module is connected with the PC in a USB (universal serial bus) mode. And the power supply module (8) is used for supplying electric energy to each element of the tester. Further comprising: LCD display, Bluetooth. The electrical parameters can be displayed on the LCD display by only placing the reed switch in the center of the coil and pressing the key.

The application of the embodiment comprises the following steps:

1. starting up:

(1) initializing the system after starting up, resetting all devices, and displaying all initial information on an LCD display;

(2) and the system enters a waiting measurement state.

2. Starting measurement:

(1) placing the reed switch to be tested into the center of the coil, and fixing the reed switch in the center position by hands;

(2) and pressing the key to automatically start the measurement, and when seeing led flickering, the measurement is finished, and the system automatically displays the measurement result on the LCD display by only loosening the key.

3. Measurement results

(1) The LCD display is connected to the system, so that the measurement result can be displayed after the measurement is finished;

(2) except that through LCD demonstration, can also pass through the cell-phone and connect the bluetooth, show with cell-phone APP.

4. Using a/d, d/a converter measurement principle

(1) And the attraction coefficient: the D/A conversion module is realized by a program to enable the coil voltage to be 0, then the voltage gradually rises to a certain value (the value is da 1) from 0, the reed switch is closed, the light-emitting diode is lightened, the photosensitive module outputs low level to the single chip microcomputer chip, when the single chip microcomputer recognizes the high level, the value is recorded, and the attraction coefficient is calculated through a formula;

(2) and a return coefficient: the D/A conversion module is realized by a program to ensure that the coil voltage gradually decreases from high to low, the reed switch is disconnected after the coil voltage reaches a certain value (the value is da 2), the light-emitting diode is extinguished, the photosensitive module outputs high level to the singlechip chip, and when the singlechip recognizes the high level, the value is recorded, and a return coefficient is calculated by a formula;

(3) contact resistance: the voltage at two ends of the reed switch is measured by using an a/d converter (data obtained in a chip is binary and is represented by AD), the voltage drop of the light-emitting diode is constant, the constant current is shown, the current value is 0.2A, the contact resistance can be measured by using the ohm law, and the return coefficient is calculated by a formula;

in the process, all calculation is processed by a chip, automatic measurement can be realized by a circuit measurement mode, manual measurement is replaced, the measurement efficiency is improved, the error is small, and the result is reliable.

Claims

1. The utility model provides an automatic change tongue tube electrical parameter measuring apparatu which characterized in that: the dry reed pipe module (5) comprises a dry reed pipe module (5) and a d/a conversion module (6), the dry reed pipe module (5) comprises a light emitting diode (52), the conduction voltage drop of the light emitting diode (52) is 3V, one end of the light emitting diode (52) is connected with a resistor R2, the R2 is 120 omega, the other end of the light emitting diode is connected with a dry reed pipe (51) to be detected, one end of the dry reed pipe (51) to be detected is connected with a power supply, the other end of the resistor R2 is grounded, the d/a conversion module (6) comprises a d/a converter (61), the output end of the d/a converter is connected with an operational amplifier (62), the output end of the operational amplifier (62) is connected with the cathode of a freewheeling diode (63) and one end of a coil (64), the anode of the freewheeling diode (63) is grounded, the freewheeling diode (63) is used for smoothing current, the number of turns of 500 omega of the coil (64), and one end of the resistor R1 is 35, the other end of the resistor is grounded; further comprising: the input device is a key and is mainly used for providing a conversion signal; the output equipment is a display module (7) and is used for displaying the converted parameters sent by the single chip microcomputer chip (1); the measuring end of the a/d converter (3) is connected with two ends of a reed pipe (51) to be measured and is used for measuring the voltage of the two ends of the reed pipe; the photosensitive module (4) is used for receiving optical signals sent by the light emitting diode (52), the anode of the photosensitive diode in the photosensitive module (4) is connected with the ground, and the cathode GM is connected with the IO port of the single chip microcomputer chip (1); the communication module (2) is used for downloading programs, uploading data to a PC (personal computer) and uploading the data to a mobile phone APP, and the communication module (2) is connected with the interface of the singlechip chip (1) in a serial port mode and connected with the PC in a USB (universal serial bus) mode; and the power supply module (8) is used for supplying electric energy to each element of the tester.

2. An automated reed switch electrical parameter measurement instrument as in claim 1, wherein: the display module (7) is an LCD display.

3. An automated reed switch electrical parameter measurement instrument as in claim 1, wherein: the communication module (2) further comprises Bluetooth and is used for uploading the converted data to a mobile phone APP.

4. An automated reed switch electrical parameter measurement instrument as in claim 1, wherein: the reed switch (51) to be tested is placed in the center of the coil (64).