CN211061647U

CN211061647U - Automatic detection device for mV (modified mV) to mA (metal oxide) module

Info

Publication number: CN211061647U
Application number: CN201921957677.9U
Authority: CN
Inventors: 刘艳
Original assignee: Weite Technologies Co ltd
Current assignee: Weite Technologies Co ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-07-21
Anticipated expiration: 2029-11-13

Abstract

The utility model discloses an automatic checkout device of mV commentaries on classics mA module, change mA module including automatic check out test set and mV, including the MCU controller in the automatic check out test set, MCU controller electric connection has the instrument power supply, the instrument power supply is through exporting DC24V electric connection on mV changes mA module, the MCU controller passes through DA converting circuit and 0-20mV signal output electric connection on mV changes mA module, mV changes mA module through 4-20mV signal input and AD converting circuit electric connection on the MCU controller, MCU controller electric connection has the touch screen to show; the controller of the utility model realizes that the DA conversion circuit outputs 0-20mV voltage signal, and outputs corresponding 4-20mA signal through the mV to mA module, so as to realize multi-point linear detection, and the detection of multiple groups of data improves the measurement precision without the contingency of single group of data; the device is simple to operate, and a detection conclusion is given directly through touch screen display.

Description

Automatic detection device for mV (modified mV) to mA (metal oxide) module

Technical Field

The utility model relates to a detect technical field, specifically be an automatic checkout device that mV changes mA module.

Background

At the present stage, a plurality of modules for converting mV signals into mA signals are available on the market, but no special test equipment is provided, a customer can only want to use the modules by himself, one end of each module outputs one mV value by using a signal generator or a sensor, the other end of each module uses a universal meter to detect the output mA value, and then the current output quantity is calculated, so that whether the modules are normal or not is deduced, calculation errors are easy to occur in the calculation process, the calculation and detection of single-group data have large error, if a plurality of points are needed to be detected, the operation is repeated for a plurality of times, time and labor are wasted, and the effect of full detection cannot be achieved; thus, an automatic detection device for the mV to mA module is urgently needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic checkout device of mV commentaries on classics mA module has the multiple spot linear detection, measurement accuracy is high and easy operation, directly gives advantages such as detection conclusion for solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an automatic checkout device of mA module is changeed to mV, changes the mA module including automatic check out test set and mV, including the MCU controller in the automatic check out test set, MCU controller electric connection has the instrument power supply, instrument power supply electric connection has output DC24V, output DC24V electric connection is on the mA module is changeed to mV, MCU controller electric connection has DA converting circuit, DA converting circuit electric connection has 0-20mV signal output, 0-20mV signal output electric connection is on the mA module is changeed to mV, mV changes the last electric connection of mA module has 4-20mV signal input, 4-20mV signal input electric connection AD converting circuit, AD converting circuit electric connection is on the MCU controller, MCU controller electric connection has the touch screen to show.

Preferably, the instrument power supply provides 3-5V voltage for the MCU controller.

Preferably, the MCU controller adopts an AT89C51 singlechip, and the AT89C51 singlechip is electrically connected with an oscillator, a clock circuit and a timer.

Preferably, DA converting circuit and AD converting circuit electric connection have adjusting resistor, swing joint has the bolt knob on the adjusting resistor.

Preferably, the output DC24V has a boost voltage and a regulator circuit built therein.

preferably, the touch screen display adopts an L ED touch display screen.

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

The utility model discloses the controller realizes that DA conversion circuit outputs 0-20 mV's voltage signal, then changes mA module through mV and realizes outputting corresponding 4-20 mA's signal, realizes the linear detection of multiple spot, and the detection of multiunit data, realizes the record of data, makes the detection of data more accurate, improves measurement accuracy, can not take place the contingency of single group data; the device is simple to operate, and a detection conclusion is given directly through touch screen display.

Drawings

FIG. 1 is a block diagram of the system of the present invention;

FIG. 2 is a linear relationship diagram of the present invention;

FIG. 3 is a voltage boosting and stabilizing circuit of the present invention;

Fig. 4 is an AD conversion circuit of the present invention;

Fig. 5 shows the DA conversion circuit of the present invention.

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.

The same reference numbers in different drawings identify the same or similar elements; it should be further understood that terms such as "first," "second," "third," "upper," "lower," "front," "rear," "inner," "outer," "end," "portion," "section," "width," "thickness," "zone," and the like, may be used solely for convenience in reference to the figures and to aid in describing the invention, and are not intended to limit the invention.

please refer to fig. 1-5, the utility model provides a technical scheme, an automatic detection device of mV to mA module, including automatic detection equipment and mV to mA module, in order to realize the control to automatic detection equipment, include the MCU controller in the automatic detection equipment, in order to carry out to the MCU controller repeatedly erasing and writing the procedure and save manufacturing cost, make the MCU controller adopt AT89C51 singlechip, in order to realize the steady operation and the timing of AT89C51 singlechip, electric connection has the oscillator, clock circuit and timer on the AT89C51 singlechip, in order to realize supplying power to the system, there is instrument power supply AT the MCU controller electric connection, instrument power supply provides 3-5V voltage to the MCU controller, because the applicable voltage of MCU controller is generally 5V, so the voltage control that instrument power supply provides is AT 3-5V, in order to realize to supply power to the touch screen conversion module, there is output DC24V AT instrument power supply electric connection, in order to make the voltage can improve to the voltage range that mV changes to the module is suitable, there is built-in output voltage control is 3-5V AT the output voltage control, in order to realize that the electricity conversion of instrument power supply, it changes the display circuit to realize that the mV conversion of mV conversion between the mV and the touch screen, it changes the electrical connection to realize the mV to change the electrical connection of the display signal, the MCU module, the electrical connection has the MCU, the electrical connection to realize the MCU that the electrical connection of the MCU can change the MCU switch between 20mV to the MCU circuit, the electrical connection of the mV to the electrical connection of the input signal conversion between the mV to the display module, the mV to the mV conversion, the display module, the electrical connection of the mV to realize the mV conversion of the electrical connection of the mV to the mV conversion, the display module, the mV conversion of the electrical.

AT89C51 provides the following standard functions: 4 kbyte Flash memory, 256 bytes on-chip data memory (00H-7FH is on-chip RAM, 80H-FFH is special function register SFR), 32I/O port lines, two 16-bit timing/counters, a 5-vector two-stage interrupt structure, a full-duplex serial communication port, an on-chip oscillator and a clock circuit. AT89C51, AT the same time, may operate down to 0Hz static logic and support two software selectable power saving modes of operation. The idle mode stops the CPU from operating, but allows the RAM, timer/counter, serial port and interrupt system to continue operating. The power down mode saves the contents of the RAM but the oscillator stops and disables all other components until the next hardware reset.

The working principle is as follows: firstly, an mV to mA module is electrically connected with automatic detection equipment, then an MCU controller and the mV to mA module are powered by a meter, when the voltage is switched on, the MCU controller outputs 0-20mV signals by controlling a DA conversion circuit, the 0-20mV signals are output and transmitted to the mV to mA module which is electrically connected to realize conversion, then the mV to mA module outputs 4-20mA signals to an AD conversion circuit which is electrically connected, then the AD conversion circuit transmits the signals to the MCU controller, through the calculation of the MCU controller, a is the mV value output by the equipment, b is the mA value calculated by the equipment, c is the mA value collected by the equipment, when b is (20-4) (a-0)/(20-0), the calculated theoretical value is equal to c, the comparison is normal, and the detected data are displayed on a touch screen display, and the detection conclusion is displayed, and the automatic detection device can detect a plurality of groups of data in sequence and compare the data.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a mV changes automatic checkout device of mA module, includes automatic checkout equipment and mV changes mA module, its characterized in that: including the MCU controller in the automatic check out test set, MCU controller electric connection has the instrument power supply, instrument power supply electric connection has output DC24V, output DC24V electric connection is on mV changes the mA module, MCU controller electric connection has DA converting circuit, DA converting circuit electric connection has 0-20mV signal output, 0-20mV signal output electric connection is on mV changes the mA module, mV changes electric connection has 4-20mV signal input on the mA module, 4-20mV signal input electric connection AD converting circuit, AD converting circuit electric connection is on the MCU controller, MCU controller electric connection has the touch screen to show.

2. The automatic detection device for the mV to mA module of claim 1, wherein: the instrument power supply provides 3-5V voltage for the MCU controller.

3. The automatic detection device for the mV to mA module of claim 1, wherein: the MCU controller adopts an AT89C51 singlechip, and the AT89C51 singlechip is electrically connected with an oscillator, a clock circuit and a timer.

4. The automatic detection device for the mV to mA module of claim 1, wherein: DA converting circuit and AD converting circuit electric connection have adjusting resistor, swing joint has the bolt knob on the adjusting resistor.

5. The automatic detection device for the mV to mA module of claim 1, wherein: the output DC24V is provided with a boost voltage and a voltage regulator circuit.

6. the automatic detection device for the mV to mA module of claim 1, wherein the touch screen display is an L ED touch screen display.