CN210375525U

CN210375525U - New energy automobile pressure sensor intelligence calibration and sieving mechanism

Info

Publication number: CN210375525U
Application number: CN201921589627.XU
Authority: CN
Inventors: 付忠亮; 黄忠毅; 兰慧敏
Original assignee: Zhejiang Yili Automobile Air Conition Co ltd
Current assignee: Zhejiang Yili Automobile Air Conition Co ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-04-21
Anticipated expiration: 2029-09-24

Abstract

The utility model discloses a new energy automobile pressure sensor intelligent calibration and screening device, which comprises a device control box body and a box cover, wherein the top of the device control box body is provided with the box cover, aviation plugs are distributed on the top of the box cover, the front part of the device control box body is provided with a computer communication interface, the right part of the computer communication interface is provided with a work indicator lamp, the right part of the work indicator lamp is provided with a 220V input port, the right part of the 220V input port is provided with a fuse, the right part of the fuse is provided with a power switch, the interior of the device control box body is provided with a detection device control core, the detection device control core is electrically connected with a product to be detected and a display, the product to be detected is connected with an auxiliary air source, a pressure controller and an air valve pipeline, the detection device control core is electrically connected with a single chip microcomputer, the efficiency of detection is improved, easy operation, efficient, intelligent, with low costs, stable performance, commonality are strong and can upgrade.

Description

New energy automobile pressure sensor intelligence calibration and sieving mechanism

Technical Field

The utility model relates to a new energy automobile technical field specifically is a new energy automobile pressure sensor intelligent calibration and sieving mechanism.

Background

The detection mode adopted by enterprises at present is that a pressure gas cylinder outputs gas, the gas cylinder is connected to a gas inlet valve of a pressure controller through a gas pipe, a gas outlet valve of the pressure controller is connected to a gas valve pipeline through the gas pipe, finally, a product is installed on the gas valve pipeline, the product and the pipeline are directly connected through threads, and gas pressures with different pressures are applied to the gas valve pipeline; and then the product is supplied with power through a power box, and is externally connected with a digital oscilloscope to detect and observe the square wave frequency and the duty ratio value output by the product under different pressures, and finally, the square wave frequency and the duty ratio value are manually judged.

When the existing automobile pressure sensor is produced in batches, after each product is produced, the product needs to be manually detected one by one, the number of detection items is large, the qualified product can be packaged, warehoused and shipped, the detection process is backward, the yield cannot be increased all the time, and the production efficiency is low.

The workshop management personnel reflect that each product needs to test the output of 4 gears and depends on manual work to detect the output one by one, so that the efficiency is very low; meanwhile, people are easy to fatigue, and have the situations of missing detection and error detection, according to the reaction of operators, the operators work for 8 hours a day, eyes always look at the oscilloscope, and the eyes are easy to fatigue; in addition, the gears to be detected of each product are multiple, and the standard threshold range is wrongly recorded sometimes.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

An object of the utility model is to provide a new energy automobile pressure sensor intelligence calibration and sieving mechanism has solved the problem that proposes in the background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the utility model provides a new energy automobile pressure sensor intelligence calibration and sieving mechanism, includes device control box body and lid, the top of device control box body is equipped with the lid, the top of lid is distributed has the aviation plug, the front portion of device control box body is equipped with computer communication interface, computer communication interface's right part is equipped with the work pilot lamp, the right part of work pilot lamp is equipped with 220V input port, the right part of 220V input port is equipped with the fuse, the right part of fuse is equipped with switch, the inside of device control box body is equipped with detection device control core, detection device control core electric connection has and waits to detect product and display, it connects in auxiliary gas source, pressure controller and pneumatic valve pipeline to detect the product, detection device control core electric connection has the singlechip.

Preferably, a wiring harness is connected between the device control box body and the working power supply and between the device control box body and the computer communication interface, and the inside of the wiring harness is of a 3-core structure.

Preferably, the device control box body and the box cover are PVC waterproof structures, the top of the box cover is provided with 24 detection channels, the detection channels are sequentially divided into 3 rows, and each row has 8 channels.

Preferably, the frequency display precision of the device control box body is 0.01Hz, the error is less than 0.1Hz, the duty ratio display precision is 0.01 percent, and the error is less than 0.1 percent.

Preferably, the control core of the detection device is electrically connected with a working power supply and an operation button, and the working power supply is 220V.

(III) advantageous effects

The utility model provides a new energy automobile pressure sensor intelligent calibration and sieving mechanism. The method has the following beneficial effects:

(1) the intelligent calibration and screening device for the new energy automobile pressure sensor does not change an original gas cylinder, a pressure controller and a gas valve pipeline with auxiliary functions, reuses the gas cylinder, reduces the cost, can simultaneously detect a plurality of products, improves the detection efficiency, automatically designs a detection circuit by applying an electronic detection technology to measure the frequency and the duty ratio of square wave signals, does not need to be externally connected with instruments and meters such as an oscilloscope and the like, has small volume and simple and flexible interfaces, is convenient to support other similar products, only needs to replace a wiring harness butt joint and modify threshold parameters, has a single wiring harness butt joint for each product, directly uses an aviation plug for connecting wiring harnesses from a device control box, does not need to be externally connected with a power box, is directly powered by the device, reduces external connecting wires as much as possible, can randomly set a standard threshold value of a detection point, and can permanently record, the universality of the device is stronger.

(2) This new energy automobile pressure sensor intelligence calibration and sieving mechanism, this device adopt the MCU singlechip as the controller, by its automatic output detection, the autofilter function of accomplishing the product, artifical only need click 4 buttons can, have easy operation, efficient, intelligent, with low costs, stable performance, the commonality is strong, can upgrade a great deal of advantage such as.

Drawings

Fig. 1 is a schematic view of the overall structure of the intelligent calibration and screening device for the new energy automobile pressure sensor of the present invention;

fig. 2 is a schematic diagram of a main structure of the system of the intelligent calibration and screening device for the new energy automobile pressure sensor of the present invention;

fig. 3 is the utility model relates to a new energy automobile pressure sensor intelligent calibration and sieving mechanism's hardware circuit structure schematic diagram.

In the figure: the device comprises a device control box body 1, a box cover 2, an aviation plug 3, a computer communication interface 4, a work indicator lamp 5, a 220V input port 6, a fuse 7 and a power switch 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an embodiment of the present invention provides a technical solution: an intelligent calibration and screening device for a new energy automobile pressure sensor comprises a device control box body 1 and a box cover 2, the top of the device control box body 1 is provided with a box cover 2, the top of the box cover 2 is distributed with aviation plugs 3, the front part of the device control box body 1 is provided with a computer communication interface 4, the right part of the computer communication interface 4 is provided with a work indicator lamp 5, the right part of the work indicator lamp 5 is provided with a 220V input port 6, the right part of the 220V input port 6 is provided with a fuse 7, the right part of the fuse 7 is provided with a power switch 8, the interior of the device control box body 1 is provided with a detection device control core, the detection device comprises a detection device control core and is characterized in that the detection device control core is electrically connected with a product to be detected and a display, the product to be detected is connected with an auxiliary air source, a pressure controller and an air valve pipeline, and the detection device control core is electrically connected with a single chip microcomputer.

The device is characterized in that a wiring harness is connected between the device control box body 1 and the working power supply and between the device control box body and the computer communication interface 4, the inside of the wiring harness is of a 3-core structure, no power supply needs to be additionally configured, the device can independently supply power for 24 detection channels, and the power supply voltage is 12V.

Device control box body 1 and lid 2 are PVC waterproof construction, the top of lid 2 is equipped with 24 sense channels, the sense channel divide into 3 rows in proper order, 8 passageways of every row, and waterproof performance is high, but a plurality of products of disposable detection.

The frequency display precision of the device control box body 1 is 0.01Hz, the error is less than 0.1Hz, the duty ratio display precision is 0.01 percent, and the error is less than 0.1 percent, so that the detection precision is more accurate.

The detection device control core electric connection has working power supply and operating button, working power supply is 220V, and inside rectification, filtering, steady voltage, output have the short-circuit protection function.

The working principle is as follows: the whole device is realized by adopting a singlechip system, the measurement of frequency and duty ratio is realized by utilizing a timer of the singlechip, a computer is adopted as a display and a button input end of the device, upper computer software is developed on the computer, the direct communication between the singlechip and the computer is realized by virtue of a serial port of the singlechip, the required function is realized, a power supply directly selects common commercial power 220V, then a direct current stabilized voltage supply circuit is designed in the device to supply power to a system circuit and a product, a lower computer program is compiled by C51, secondary development is carried out by virtue of an ST official peripheral hardware library, and the preset function is realized according to the design requirement;

the minimum system circuit design of the single chip microcomputer uses STM32F103C8T6 of ST company and a 48-pin MCU, the system working clock of the single chip microcomputer can reach 72M at most, the detection precision of the device on frequency and duty ratio can be greatly improved, a plurality of IO ports also meet the circuit requirement, two serial ports are provided, one serial port can be used for communicating with a computer upper computer, the other serial port is reserved as a pressure controller to be upgraded to a module with a remote control function, the communication is used for controlling the pressure controller, the whole detection process is further simplified, the whole device is reserved for later upgrading use, hardware does not need to be changed, one-key intelligent operation can be realized by modifying software, and the working power supply voltage of the chip is 3.3V;

the design of the channel switching selection circuit, any one single chip microcomputer has no 24 timer channels which can be used for detecting products simultaneously, therefore, a channel switch switching selection circuit needs to be designed, the single chip microcomputer is used for controlling and sequentially conducting the product channels to be detected, the 24-channel channels are finally measured by one timer channel of the single chip microcomputer, according to learned digital circuit knowledge and network search, an 8-bit data selector chip 74HC151 is finally selected as a channel switching switch, the switching of the 24-channel channels can be met by using 3 chips, the principle of the channel switching selection circuit is similar to that of a 3-8 decoder, one input channel D can be arbitrarily selected to be conducted with an output channel Y as long as the single chip microcomputer changes the levels of A, B, C three address ends, Y output diodes of the 3 chips form an IO port which is sent to the single chip microcomputer together with an AND gate circuit, the output is not affected mutually, because the 74HC151 uses 3.3V voltage for power supply, in order to prevent the chip from being damaged by the 12V signal output by the product, a current-limiting resistor and a diode are added in front of the input end of each product output connected to the 74HC151 to pull up to 3.3V for clamp protection;

the communication interface circuit design, the communication mode of the single chip and the computer is RS232, the interface chip is ST3232, ST3232 is connected with the computer through a USB switching port line, the computer has independent power supply, the device supplies power independently, in order to prevent mutual interference between two power supplies, therefore, the isolation circuit on the network is referred, the isolation chip is added between the single chip and the ST3232, and the electrical interference resistance of the device is further enhanced;

meanwhile, considering that the device possibly needs to be upgraded subsequently, an enterprise needs to replace the pressure controller to have remote digital control, and the device needs to directly control the pressure output of the pressure controller, an RS485 communication interface circuit is designed; the power supply circuit is designed, the power supply input is 220V of commercial power, a transformer for converting 220V into 15V is used for reducing voltage, the anti-interference and safety protection are also considered, and a fuse is connected when the power supply enters the device control box to prevent short circuit; the EMI filter circuit is connected to suppress interference, the DC voltage is rectified and filtered through the rectifier bridge, the voltage is regulated to 12V and 3.3V respectively through the DC voltage stabilizing circuit, the 12V is used for supplying power to a product to be detected, the 3.3V is used for supplying power to an internal circuit of the device, and two communication interfaces are independently combined into a 3.3V isolated power supply;

the upper computer display interface adopts a Dephi7 visual programming environment to compile, the communication interface with the lower computer is self-defined by a communication protocol by means of a serial port control of software, the interface function mainly comprises a threshold value setting function column, a 24-channel product frequency, duty ratio data display column, a screening result display column and an operation button column, the threshold value setting column clicks a 'reading' button to read and display original setting parameters in the device, the latest setting parameters are written into a memory of a hardware circuit of the device by clicking 'setting', the operation is set, a 'xx' button is clicked each time, a check mark is displayed in front to prompt the end of the detection of the point, 24-channel detection is displayed, qualified parameters are displayed in green, unqualified parameters are displayed in red, distinct color contrast is realized, rapid distinction is utilized, all mathematical operations such as data operation, threshold value contrast and the like are completed by a lower computer singlechip, the interface only realizes the input and output display of numerical values and the transmission of operation commands.

The utility model discloses a device control box body 1, lid 2, aviation plug 3, computer communication interface 4, work pilot lamp 5, 220V input port 6, fuse 7, switch 8, the part is general standard component or the part that technical staff in the field knows, and its structure and principle all can be known or can be known through conventional experimental approach through the technical manual for this technical staff, the problem that the utility model solves is that efficiency is very low; meanwhile, people are easy to fatigue, and have the situations of missing detection and error detection, according to the reaction of operators, the operators work for 8 hours a day, eyes always look at the oscilloscope, and the eyes are easy to fatigue; in addition, the gear to be detected of each product is many, the standard threshold value range can be wrongly recorded sometimes, the utility model discloses through the mutual combination of the above-mentioned parts, the gas cylinder, the pressure controller and the gas valve pipeline of the original auxiliary action are not changed, reuse is carried out, the cost is reduced, a plurality of products can be detected simultaneously by the screening device, the efficiency of detection is improved, a detection circuit is designed by oneself by applying the electronic detection technology, the frequency and the duty ratio of the square wave signal are measured, instrument and instruments such as external oscillograph are not needed, the volume is small, the interface is simple and flexible, other similar products are convenient to support, only the wiring harness butt joint needs to be changed and the threshold value parameter is modified, a wiring harness butt joint is singly arranged for each product, the wiring harness is directly connected by the aviation plug from the device control box, no external power box is needed, the power is directly, the standard threshold value of the detection point can be set at will and can be recorded permanently, so that the device has stronger universality, the MCU singlechip is adopted as the controller, the output detection and automatic screening functions of the product are automatically completed by the MCU singlechip, and only 4 buttons need to be manually clicked, so that the device has the advantages of simple operation, high efficiency, intellectualization, low cost, stable performance, strong universality, upgradability and the like.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a new energy automobile pressure sensor intelligence calibration and sieving mechanism which characterized in that: the device control box comprises a device control box body (1) and a box cover (2), wherein the box cover (2) is arranged at the top of the device control box body (1), aviation plugs (3) are distributed on the top of the box cover (2), a computer communication interface (4) is arranged at the front part of the device control box body (1), a work indicator lamp (5) is arranged at the right part of the computer communication interface (4), a 220V input port (6) is arranged at the right part of the work indicator lamp (5), a fuse (7) is arranged at the right part of the 220V input port (6), a power switch (8) is arranged at the right part of the fuse (7), a detection device control core is arranged in the device control box body (1), the detection device control core is electrically connected with a product to be detected and a display, the product to be detected is connected with an auxiliary air source, a pressure controller and an air valve pipeline, the detection device control core is electrically connected with a single chip microcomputer.

2. The intelligent calibration and screening device for the new energy automobile pressure sensor according to claim 1, characterized in that: a wiring harness is connected between the device control box body (1) and the working power supply and between the device control box body and the computer communication interface (4), and the interior of the wiring harness is of a 3-core structure.

3. The intelligent calibration and screening device for the new energy automobile pressure sensor according to claim 1, characterized in that: the device control box is characterized in that the device control box body (1) and the box cover (2) are both PVC waterproof structures, 24 detection channels are arranged at the top of the box cover (2), and the detection channels are sequentially divided into 3 rows and 8 channels in each row.

4. The intelligent calibration and screening device for the new energy automobile pressure sensor according to claim 1, characterized in that: the frequency display precision of the device control box body (1) is 0.01Hz, the error is less than 0.1Hz, the duty ratio display precision is 0.01 percent, and the error is less than 0.1 percent.

5. The intelligent calibration and screening device for the new energy automobile pressure sensor according to claim 1, characterized in that: the detection device control core is electrically connected with a working power supply and an operation button, and the working power supply is 220V.