CN217718993U

CN217718993U - Industrial control all-in-one machine for number calling system

Info

Publication number: CN217718993U
Application number: CN202221803375.8U
Authority: CN
Inventors: 邓小刚
Original assignee: Guangzhou Gaoneng Computer Technology Co ltd
Current assignee: Guangzhou Gaoneng Computer Technology Co ltd
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2022-11-01
Anticipated expiration: 2032-07-12

Abstract

The utility model relates to an industrial computer technical field, in order to solve the current industrial control all-in-one can not adjust luminance or adjust luminance the poor technical problem who easily causes the injury to the human eye of precision, the utility model provides an industrial control all-in-one for calling out the number system, including the high accuracy light modulation circuit who is used for adjusting the display screen backlight, the high accuracy light modulation circuit is provided with light modulation controller, light modulation controller's drive end is through being connected with switch tube Q14's grid, switch tube Q14's source electrode is through examining flow resistance R55 ground connection, and with the partial pressure signal feedback to light modulation controller of detection resistance, switch tube Q14's drain electrode passes through inductance L7 and is connected with negative pole output port, still be provided with switch tube Q15, through set up switch tube Q15 as accurate current regulation and control between positive pole output port and negative pole output port, with the error current that produces when eliminating inductance L7 and charge-discharge, the precision of adjusting luminance has been improved. By improving the dimming precision, the light is gradually changed instead of suddenly changed, and the eyes can adapt more easily.

Description

Industrial control all-in-one machine for number calling system

Technical Field

The utility model relates to an industrial computer technical field, concretely relates to industry control all-in-one for system of calling out numbers.

Background

An Industrial Personal Computer (IPC) is a product of combination of Computer technology and automatic control technology, is a reinforced Computer, can be used as an Industrial controller to reliably operate in Industrial environment, and is applied to the fields of Industrial production, banks, government affairs and the like.

In the number calling machine series, split machines are mostly used, and a special display screen is used for connecting a host. Meanwhile, an industrial control all-in-one machine is also provided, the display component and the industrial control host are integrated together, the existing industrial control all-in-one machine has the advantages that the backlight source or the fixed brightness of the display screen cannot be adjusted in light, or the adjustment precision of a light adjusting circuit is low, the step change is large during light adjustment, namely, the light adjustment is discontinuous, the light adjustment is too bright, the too high brightness stimulation brings people a very bad feeling, the screen flashes when the light is adjusted, the eyes cannot adapt to the situation, the eyes can be injured, and the stability of the light emission of the LED in the backlight source directly determines the light adjustment and the video image display quality.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that current industry control all-in-one can not adjust luminance or adjust luminance the poor easy injury that causes the eyes of precision, the utility model provides an industry control all-in-one for calling out the number system through improving the precision of adjusting luminance, makes eyes more comfortable.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an industrial control integrated machine for a number calling system comprises a display component and a host fixedly connected with the display component, wherein the display component comprises a display screen and a high-precision dimming circuit used for adjusting a backlight source of the display screen, the high-precision dimming circuit is provided with a dimming controller, a driving end of the dimming controller is connected with a grid electrode of a switch tube Q14 through a resistor R51, a source electrode of the switch tube Q14 is grounded through a current detection resistor R55, a source electrode of the switch tube Q14 is connected with a current detection end of the dimming controller, a drain electrode of the switch tube Q14 is connected with a power supply input port through a voltage stabilizing tube Z3 used for outputting filtering, a drain electrode of the switch tube Q14 is connected with a negative electrode output port through an inductor L7, and the power supply input port is connected with a positive electrode output port; the dimming controller is further provided with a switching tube Q15 and a switching tube Q16, the drain electrode of the switching tube Q15 is connected with the positive electrode output port, the source electrode of the switching tube Q15 is connected with the negative electrode output port, the grid electrode of the switching tube Q15 is connected with the drain electrode of the switching tube Q16, the source electrode of the switching tube Q16 is grounded, and the grid electrode of the switching tube Q16 is connected with the dimming input end of the dimming controller U19 through a resistor R59 and a diode D15 which are connected in parallel. The switch tube Q15 is arranged between the anode output port LED + and the cathode output port LED-to be used as accurate current regulation and control, so that error current generated during charging and discharging of the inductor L7 is eliminated, and the dimming precision is improved. By improving the dimming precision, the light is gradually changed instead of suddenly changed, and the eyes can adapt more easily.

Furthermore, still be provided with electric capacity C33, electric capacity C33's both ends are anodal output port respectively and are connected with negative pole output port, and electric capacity C33 is used for reducing output current ripple, improves EMI electromagnetic radiation.

Further, the industrial personal computer comprises a DC input interface, a wide voltage stabilizing circuit board is arranged in the industrial personal computer, the wide voltage stabilizing circuit board is provided with a voltage stabilizing circuit, a DC input port of the voltage stabilizing circuit is connected with the DC input interface, the voltage stabilizing circuit comprises a voltage stabilizing control circuit and a voltage sampling circuit, a drive output end of the voltage stabilizing control circuit is connected with a controlled end of a switch tube Q12 through a drive signal amplifying circuit, an anode of the DC input interface is connected with a power supply end of the switch tube Q12 through a drain electrode of the switch tube Q12 through an inductor L6, a grounding end of the switch tube Q12 is grounded, the power supply end of the switch tube Q12 sequentially passes through a capacitor C25 and an inductor L5, the power supply end of the switch tube Q12 sequentially passes through a capacitor C25 and a rectifier diode and is connected with a DC output port, and the voltage sampling circuit performs voltage sampling from the DC output port and feeds back the voltage sampling to the voltage stabilizing control circuit. Through voltage stabilizing circuit to DC input voltage regulation output DC output voltage, wherein, drive signal amplifier circuit amplifies the drive signal of steady voltage control circuit, then drive switch tube Q12 action, through voltage sampling circuit sampling DC output voltage, feed back to steady voltage control circuit and adjust in real time, make switch tube Q12's switching frequency change, so that output stable voltage, can use different power adapter, solve the problem that current thin industrial computer can't be compatible with different output voltage's power adapter.

Further, the voltage sampling circuit comprises a resistor R49 and a resistor R50 which are connected in series, one end of the resistor R50 is grounded, the other end of the resistor R50 is connected with one end of the resistor R49, and the other end of the resistor R49 is connected with the DC output port.

Further, a minimum voltage starting circuit is arranged at a power input end of the voltage stabilization control circuit and comprises an NPN type triode Q11, a base electrode of the triode Q11 is connected with the positive electrode of the DC input port through a resistor R45, a collector electrode of the triode Q11 is connected with the positive electrode of the DC input port, an emitter electrode of the triode Q11 is grounded through a capacitor C26, the emitter electrode of the triode Q11 is connected with a power supply end of the driving signal amplification circuit, a voltage stabilizing tube Z2 is further arranged, an anode of the voltage stabilizing tube Z2 is grounded, and a cathode of the voltage stabilizing tube Z2 is connected with the base electrode of the triode Q11.

Further, the driving signal amplifying circuit comprises an NPN type triode Q9 and a PNP type triode Q10, the triode Q9 and the triode Q10 share a base electrode, and the base electrode is connected with the driving output end of the voltage stabilizing control circuit through a resistor R43; the common emitter of the triode Q9 and the triode Q10 is connected with the controlled end of the switching tube Q12Q 12; the collector of the transistor Q9 is connected to the emitter of the transistor Q11, and the emitter of the transistor Q10 is grounded.

Implement the utility model discloses the beneficial effect who brings does:

the switch tube Q15 is arranged between the anode output port LED + and the cathode output port LED-to be used as accurate current regulation and control, so that error current generated during charging and discharging of the inductor L7 is eliminated, and the dimming precision is improved. By improving the dimming precision, the light is gradually changed instead of suddenly changed, and the eyes can adapt more easily. In addition, the DC output voltage is regulated and output to the DC input voltage through the voltage stabilizing circuit, wherein the driving signal amplifying circuit amplifies a driving signal of the voltage stabilizing control circuit, then the switching tube Q12 is driven to act, the DC output voltage is sampled through the voltage sampling circuit and fed back to the voltage stabilizing control circuit to be regulated in real time, so that the switching frequency of the switching tube Q12 is changed, stable voltage is output, different power adapters can be used, and the problem that the existing thin industrial personal computer cannot be compatible with the power adapters with different output voltages is solved.

Drawings

Fig. 1 is a first three-dimensional structure diagram of an industrial control all-in-one machine for a number calling system provided by the embodiment of the utility model;

fig. 2 is a second three-dimensional structure diagram of the industrial control all-in-one machine for the number calling system provided by the embodiment of the utility model;

fig. 3 is a diagram of an internal structure of a host for a number calling system according to an embodiment of the present invention;

fig. 4 is a structural diagram of a peripheral power supply and a dimming signal input circuit of a dimming controller according to an embodiment of the present invention;

fig. 5 is a main circuit structure diagram of a high-precision dimming circuit provided in an embodiment of the present invention;

fig. 6 is a diagram of an auxiliary circuit structure of a high-precision dimming circuit provided by an embodiment of the present invention;

fig. 7 is a structure diagram of a voltage stabilizing circuit provided by the embodiment of the present invention;

fig. 8 is a structural diagram of a voltage sampling circuit and a filter circuit according to an embodiment of the present invention;

fig. 9 is a structure diagram of a voltage stabilizing control circuit provided in the embodiment of the present invention.

In the figure: u19, a dimming controller; VIN, power input port; LED +, a negative output port; LED-, a negative output port; d14, a rectifier diode; DC _ IN, DC input voltage; DC _ OUT, DC output voltage; SW _ CON, control signal; 10. a display component; 20. a host; 21. a DC input interface; 22. a wide voltage regulator circuit board; 23. an Ethernet interface; 24. an audio interface; 25. an HDMI interface; 26. a VGA interface; 27. and a USB interface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1 to 6, the utility model provides an industrial control all-in-one machine for calling number system, including display module 10 and host 20, display module 10 includes display screen and the high accuracy light modulation circuit that is used for adjusting the display screen backlight, and the high accuracy light modulation circuit is provided with light modulation controller U19, and the 1 st end of light modulation controller U19 is the input end of adjusting luminance, is used for inputting the light modulation signal; the 2 nd end and the 5 th end are grounding ends; the 3 rd end is a power supply end and is used for inputting a power supply; the 4 th terminal is a current detecting terminal, and the 6 th terminal is a driving terminal. The dimming controller U19 has the capability of stably outputting a constant current, load power adjustment and high-precision current control.

Specifically, a driving end of the dimming controller U19 is connected to a gate of the switching tube Q14 through a resistor R51, the switching tube Q14 is used for controlling a loop current, a source of the switching tube Q14 is grounded through a current detection resistor R55, a source of the switching tube Q14 is connected to a current detection end of the dimming controller U19, a drain of the switching tube Q14 is connected to a power input port VIN through a voltage regulator tube Z3 for outputting filtering, an anode of the voltage regulator tube Z3 is connected to a drain of the switching tube Q14, and a cathode of the voltage regulator tube Z3 is connected to the power input port VIN. The drain electrode of the switching tube Q14 is connected with the cathode output port LED-through an inductor L7, and the power input port VIN is directly connected with the anode output port LED +; the dimming circuit is further provided with a switching tube Q15 and a switching tube Q16, the drain electrode of the switching tube Q15 is connected with the positive output port LED +, the source electrode of the switching tube Q15 is connected with the negative output port LED-, the grid electrode of the switching tube Q15 is connected with the drain electrode of the switching tube Q16, the source electrode of the switching tube Q16 is grounded, and the grid electrode of the switching tube Q16 is connected with the dimming input end of the dimming controller U19 through a resistor R59 and a diode D15 which are connected in parallel. The dimming signal is input to the gate of the switching tube Q16, and when the dimming signal is at a high level, the switching tube Q16 is turned on, and then the switching tube Q15 is turned off, otherwise, the switching tube Q15 is turned on.

The switch tube Q15 is arranged between the anode output port LED + and the cathode output port LED-to be used as accurate current regulation and control, so that error current generated during charging and discharging of the inductor L7 is eliminated, and the dimming precision is further improved.

And a capacitor C33 is also arranged between the anode output port LED + and the cathode output port LED-, and two ends of the capacitor C33 are respectively connected with the anode output port LED + and the cathode output port LED-, so that output current ripples are reduced and EMI electromagnetic radiation is improved.

Referring to fig. 2 and fig. 3, the power module of the all-in-one industrial personal computer is external, power is supplied to the whole computer through a power adapter, and the all-in-one industrial personal computer is provided with a DC input interface 21 for obtaining working voltage, a video interface for outputting images, an audio interface 24 for audio input and output, a USB interface 27 for mounting a USB storage device or USB communication, and an ethernet interface 23 for network communication, wherein the video interface includes a VGA interface 26 for outputting normal-definition images and an HDMI interface 25 for outputting high-definition images, the VGA interface 26 and the HDMI interface 25 can be used separately or simultaneously, and when the all-in-one industrial personal computer is used, double-screen synchronous display or desktop extension can be realized.

In order to be compatible with power adapters with different output voltages, a wide voltage stabilizing circuit board 22 is arranged in the industrial control all-in-one machine, a voltage stabilizing circuit is arranged on the wide voltage stabilizing circuit board, the input end of the voltage stabilizing circuit is connected with a DC input interface 21, and a 12V direct-current power supply can be output after the voltage of an externally input 9V to 21V direct-current power supply is stabilized.

Referring to fig. 7, the voltage stabilizing circuit includes a voltage stabilizing control circuit, a driving output terminal OUT of the voltage stabilizing control circuit is connected to a driving signal amplifying circuit through a resistor R43, the switching tube Q12 is driven to be turned on and off through the driving signal amplifying circuit, the switching tube Q12 is preferably an NMOS tube, a source of the switching tube Q12 is grounded, a gate of the switching tube Q12 is connected to an output terminal of the driving signal amplifier, an anode of a DC input port is connected to a drain of the switching tube Q12 through an inductor L6, a drain of the switching tube Q12 is grounded through a capacitor C25 and an inductor L5 in sequence, a drain of the switching tube Q12 is connected to an anode of a rectifier diode D14 through the capacitor C25, and a cathode of the rectifier diode D14 outputs an adjusted voltage DC _ OUT.

When the switch tube Q12 is turned on, the current flows through the inductor L6, and when the switch tube Q12 is turned off, due to the holding characteristic of the inductor current, the current flowing through the inductor L6 does not immediately become 0, but slowly changes from 0 after the charging is completed, and the switch tube Q12 is already turned off, so that the inductor L6 can only discharge to the ground through the capacitor C25 and the inductor L5, that is, the inductor L6 starts to charge the capacitor C25, the voltage at the two ends of the capacitor C25 changes, and different voltages can be obtained at the two ends of the capacitor C25 by controlling the switching speed of the switch tube Q12, and then the different voltages are rectified by the rectifier diode D14 and output.

Referring to fig. 8, a filter circuit is disposed after the output of the rectifying diode D14, the filter circuit includes two capacitors C30 and C31 with different capacitance values, and the capacitors C30 and C31 are respectively used for filtering noise waves or ripples of the frequency, and two ends of the capacitor C30 and the capacitor C31 are respectively connected to the DC output voltage DC _ OUT and the ground.

The voltage sampling circuit is arranged and used for collecting voltage from a line of the DC output voltage DC _ OUT and feeding the voltage back to the voltage stabilization control circuit, the voltage sampling circuit comprises a resistor R49 and a resistor R50 which are connected in series, and partial voltage is obtained from the resistor R49 and the resistor R50 and fed back to the voltage stabilization control circuit, so that the DC output voltage DC _ OUT is kept constant, and the voltage stabilization effect is achieved.

Referring to fig. 7, the power input end of the voltage regulation control circuit is provided with a minimum voltage start circuit, which includes an NPN-type triode Q11, the base of the triode Q11 is connected to the positive electrode of the DC input port (i.e., DC input voltage) through a resistor R45, the collector of the triode Q11 is connected to the positive electrode of the DC input port, the emitter of the triode Q11 is grounded through a capacitor C26, the emitter of the triode Q11 is connected to the power supply end of the drive signal amplification circuit, and a voltage regulator tube Z2 is further provided, the anode of the voltage regulator tube Z2 is grounded, and the cathode of the voltage regulator tube Z2 is connected to the base of the triode Q11. When the DC input voltage is too low, such as 5V, the triode Q11 is cut off, and the voltage stabilization control circuit and the driving signal amplifying circuit have no voltage and do not work, so that the condition that the work is unstable when the voltage is too low is avoided; when the DC input voltage reaches the minimum start voltage, for example, 8.5V, the transistor Q11 is turned on, and the voltage stabilizing control circuit and the driving signal amplifying circuit obtain the voltage to start operating.

Referring to fig. 9, the voltage stabilization control circuit mainly includes an error amplifier, a comparator and an output control circuit, a first input terminal of the error amplifier is connected to an output terminal of the voltage sampling circuit, a second input terminal of the error amplifier is provided with a reference voltage, an output terminal of the error amplifier is connected to the first input terminal of the comparator, a second input terminal of the comparator is connected to the LC oscillating circuit, an output terminal of the comparator is connected to the output control circuit, and an output terminal of the output control circuit, that is, a driving output terminal OUT of the voltage stabilization control circuit, is connected to the driving signal amplifying circuit through a resistor R43.

Referring to fig. 7, the driving signal amplifying circuit includes an NPN-type transistor Q9 and a PNP-type transistor Q10, and the transistor Q9 and the transistor Q10 have a common base connected to a resistor R43; the common emitter of the triode Q9 and the triode Q10 is connected with the grid of the switching tube Q12; the collector of the transistor Q9 is connected to the emitter of the transistor Q11, and the emitter of the transistor Q10 is grounded. When the driving output end OUT of the voltage stabilization control circuit outputs a low level, namely the base electrodes of the triode Q9 and the triode Q10 are the low level, the triode Q9 is cut off, the triode Q10 is conducted, at the moment, the emitter electrodes of the triode Q9 and the triode Q10 are the low level, and the switching tube Q12 is turned off; when the driving output end OUT of the voltage stabilization control circuit outputs a high level, that is, the base electrodes of the triode Q9 and the triode Q10 are at the high level, the triode Q9 is turned on, the triode Q10 is turned off, and at this time, the emitter electrodes of the triode Q9 and the triode Q10 are at the high level, and the switching tube Q12 is turned on.

Referring to fig. 7, in order to facilitate the start control of the voltage regulation control circuit, a start control circuit is further provided, which includes an NPN-type transistor Q13, an emitter of the transistor Q13 is grounded, a collector of the transistor Q13 is connected to the voltage regulation control circuit through a resistor R46, a base of the transistor Q13 is connected to a control signal SW _ CON through a resistor R47, and the control signal SW _ CON may be generated by the output of the single chip microcomputer or a key circuit, and starts or closes the voltage regulation control circuit through high and low levels.

Implement the utility model discloses the beneficial effect who brings does:

a switch tube Q15 is arranged between the anode output port LED + and the cathode output port LED + to be used as accurate current regulation and control, so that error current generated when the inductor L7 is charged and discharged is eliminated, and the dimming precision is improved. By improving the dimming precision, the light is gradually changed instead of suddenly changed, and the eyes are easier to adapt. In addition, DC output voltage is regulated and output to DC input voltage through the voltage stabilizing circuit, wherein the driving signal amplifying circuit amplifies a driving signal of the voltage stabilizing control circuit, then the switching tube Q12 is driven to act, the DC output voltage is sampled through the voltage sampling circuit and fed back to the voltage stabilizing control circuit to be regulated in real time, so that the switching frequency of the switching tube Q12 is changed, stable voltage is output, different power adapters can be used, and the problem that the existing thin industrial personal computer cannot be compatible with the power adapters with different output voltages is solved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An industrial control all-in-one machine for a number calling system comprises a display component (10) and a host (20) fixedly connected with the display component (10), wherein the display component (10) comprises a display screen and a high-precision dimming circuit for adjusting a backlight source of the display screen, and the industrial control all-in-one machine is characterized in that the high-precision dimming circuit is provided with a dimming controller (U19), a driving end of the dimming controller (U19) is connected with a grid electrode of a switch tube Q14 through a resistor R51, a source electrode of the switch tube Q14 is grounded through a current detection resistor R55, a source electrode of the switch tube Q14 is connected with a current detection end of the dimming controller (U19), a drain electrode of the switch tube Q14 is connected with a power input port (VIN) through a voltage stabilizing tube Z3 for outputting filtering, a drain electrode of the switch tube Q14 is connected with a negative output port (LED-) through an inductor L7, and the power input port (VIN +) is connected with a positive output port (VIN +); the dimming circuit is further provided with a switching tube Q15 and a switching tube Q16, the drain electrode of the switching tube Q15 is connected with the positive electrode output port (LED +), the source electrode of the switching tube Q15 is connected with the negative electrode output port (LED-), the grid electrode of the switching tube Q15 is connected with the drain electrode of the switching tube Q16, the source electrode of the switching tube Q16 is grounded, and the grid electrode of the switching tube Q16 is connected with the dimming input end of the dimming controller (U19) through a resistor R59 and a diode D15 which are connected in parallel.

2. The all-in-one machine for industrial control of a number calling system according to claim 1, further comprising a capacitor C33, wherein two ends of the capacitor C33 are respectively connected to the positive output port (LED +) and the negative output port (LED-), and the capacitor C33 is configured to reduce output current ripple and improve EMI electromagnetic radiation.

3. The industrial personal computer for the number calling system of claim 2, comprising a DC input interface (21), wherein a wide voltage regulator circuit board (22) is disposed in the industrial personal computer, the wide voltage regulator circuit board (22) is provided with a voltage regulator circuit, a DC input port of the voltage regulator circuit is connected to the DC input interface (21), the voltage regulator circuit comprises a voltage regulator control circuit and a voltage sampling circuit, a driving output end of the voltage regulator control circuit is connected to a controlled end of a switch tube Q12 through a driving signal amplifying circuit, an anode of the DC input interface (21) is connected to a power supply end of the switch tube Q12 through a drain of the switch tube Q12 through an inductor L6, a ground end of the switch tube Q12 is grounded, the power supply end of the switch tube Q12 is grounded through a capacitor C25 and an inductor L5 in sequence, the power supply end of the switch tube Q12 is connected to a DC output port through a capacitor C25 and a rectifier diode (D14) in sequence, and the voltage sampling circuit samples voltage from the DC output port and feeds back the voltage to the voltage regulator control circuit.

4. The industrial personal computer of claim 3, wherein the voltage sampling circuit comprises a resistor R49 and a resistor R50 which are connected in series, one end of the resistor R50 is grounded, the other end of the resistor R50 is connected with one end of the resistor R49, and the other end of the resistor R49 is connected with the DC output port.

5. The industrial personal computer for the number calling system as claimed in claim 4, wherein the power input terminal of the voltage regulation control circuit is provided with a minimum voltage turn-on circuit, which comprises an NPN-type triode Q11, the base of the triode Q11 is connected to the positive electrode of the DC input port through a resistor R45, the collector of the triode Q11 is connected to the positive electrode of the DC input port, the emitter of the triode Q11 is grounded through a capacitor C26, the emitter of the triode Q11 is connected to the power terminal of the driving signal amplification circuit, the industrial personal computer is further provided with a voltage regulator tube Z2, the anode of the voltage regulator tube Z2 is grounded, and the cathode of the voltage regulator tube Z2 is connected to the base of the triode Q11.

6. The industrial personal computer for the number calling system according to claim 5, wherein the driving signal amplifying circuit comprises an NPN type triode Q9 and a PNP type triode Q10, the triode Q9 and the triode Q10 share a base, and the base is connected with the driving output end of the voltage stabilizing control circuit through a resistor R43; the common emitter of the triode Q9 and the triode Q10 is connected with the controlled end of the switching tube Q12Q 12; the collector of the transistor Q9 is connected to the emitter of the transistor Q11, and the emitter of the transistor Q10 is grounded.