CN204596346U - Intrinsic safe explosion-proof advertisement machine - Google Patents
Intrinsic safe explosion-proof advertisement machine Download PDFInfo
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- CN204596346U CN204596346U CN201520305667.2U CN201520305667U CN204596346U CN 204596346 U CN204596346 U CN 204596346U CN 201520305667 U CN201520305667 U CN 201520305667U CN 204596346 U CN204596346 U CN 204596346U
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Abstract
The utility model provides a kind of intrinsic safe explosion-proof advertisement machine.The utility model, comprising: for the intrinsic safety type display of presenting advertising content, for providing the flame-proof type intrinsically safe power supply of power supply to described display; Described power supply is connected with described display by twisted-pair feeder, and described power supply comprises: for provide the input power unit of power supply, for the protection of described input power unit protective circuit of voltage regulation unit, for control external voltage signal open and adjusting backlight luminance backlight inverter unit, for the protection of the backlight output protection circuit unit of described backlight inverter unit and explosion-resistant enclosure.The utility model ensure that the use safety at the scene of advertisement machine in refuelling station etc. containing inflammable gas, and alleviates the weight of explosion-proof advertisement machine, expands the size of display screen.
Description
Technical field
The utility model embodiment relates to advertisement machine technical field, particularly relates to a kind of intrinsic safe explosion-proof advertisement machine.
Background technology
The explosion-proof advertisement machine of the domestic full-size succeeded in developing is 19 cun, flame-proof type, realize the isolated of display main board and power circuit and explosion gas environment by explosion-resistant enclosure, prevent the petard because element fault causes and cause outside hazardous gas to be exploded or burning.
Because flameproof enclosure volume is large, heavy, be difficult to apply on refuelling station's column or fuel charger gantry, and the display size of advertisement machine is also restricted.
Utility model content
The utility model embodiment provides a kind of intrinsic safe explosion-proof advertisement machine, the technical matters that the display size of advertisement machine in prior art is too small to overcome, screen weights is heavy.
Intrinsic safe explosion-proof advertisement machine of the present utility model, comprising:
For presenting advertising content intrinsic safety type display, for providing the flame-proof type intrinsically safe power supply of power supply to described display, described power supply is connected with described display by twisted-pair feeder,
Described power supply comprises: for provide the input power unit of power supply, for the protection of described input power unit protective circuit of voltage regulation unit, for control external voltage signal open and adjusting backlight luminance backlight inverter unit, for the protection of the backlight output protection circuit unit of described backlight inverter unit and explosion-resistant enclosure;
Described input power unit is connected respectively at described protective circuit of voltage regulation unit, backlight inverter unit, and described backlight inverter unit is connected with described backlight output protection circuit unit.
Further; described input power unit comprises: for control power supply long-distance anti-explosion type panel switches, be converted to the ACDC voltage module of DC voltage, DCDC voltage module, rapid safety silk, voltage dependent resistor and the ground protection for step-down for electric main, described ACDC voltage module is connected to described DCDC voltage module.
Further; described protective circuit of voltage regulation unit comprises: timer, comparer, sampling resistor and switching tube; described comparer is connected to described sampling resistor, described timer; for the electric current of more described sampling resistor; and triggering switching tube described in described Timer Controlling to reach protective effect, described timer is connected to described switching tube.
Further, described backlight inverter unit comprises: PWM controller chip, inductance, Schottky Rectifier, switch mosfet, described PWM controller chip connects respectively at described inductance, described switch mosfet, and the described inductance other end connects described Schottky Rectifier, and the described switch mosfet other end connects described Schottky Rectifier.
Further; described backlight output protection circuit unit comprises: for breaking circuit MOS switching tube and the prover pipe of reference voltage is provided; for load current being converted into the current sampling resistor of voltage; for more described voltage and reference tube voltage; and drive the comparer that described MOS switching tube turns off; described current sampling resistor one end connects backlight inverter unit, and the other end connects described comparer, and the comparer other end connects described MOS switching tube.
Further, described PWM controller chip model is BIT3260.
The utility model achieves the explosion-proof problem of advertisement machine and expands the size of display screen, alleviates the weight of explosion-proof advertisement machine.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the utility model intrinsic safe explosion-proof advertisement machine structural representation;
Fig. 2 is the utility model input power element circuit schematic diagram;
Fig. 3 is the utility model protective circuit of voltage regulation schematic diagram;
Fig. 4 is the utility model backlight translation circuit schematic diagram;
Fig. 5 is the utility model backlight output protection circuit schematic diagram.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the utility model intrinsic safe explosion-proof advertisement machine structural representation, and as shown in Figure 1, the present embodiment advertisement machine, can comprise:
For presenting advertising content intrinsic safety type display 101, for providing the flame-proof type intrinsically safe power supply 102 of power supply to described display 101, described power supply 102 is connected with described display 101 by twisted-pair feeder,
Described power supply 102 comprises: for provide the input power unit 103 of power supply, for the protection of described input power unit protective circuit of voltage regulation unit 104, for control external voltage signal open and adjusting backlight luminance backlight inverter unit 105, for the protection of the backlight output protection circuit unit 107 of described backlight inverter unit and explosion-resistant enclosure 106;
Described input power unit 103 is connected respectively at described protective circuit of voltage regulation unit 104, backlight inverter unit 105, and described backlight inverter unit 105 is connected with described backlight output protection circuit unit 107.
Specifically, whole signal processing circuits of the intrinsic safety type display in the present embodiment, comprise interface circuit/mainboard/liquid crystal display driving circuit/audio output circuit and all work in 5V/3.3V/1.8V Power supply state, maximum current is no more than 2.5A, in energy-storage travelling wave tube, maximum capacitor is no more than 10uF, inductance is no more than 22uH, so this part belongs to intrinsically safe circuit.Display backlight circuit working is in constant current mode (below voltage 38V), and audio frequency power amplifier power supply is 12V, and power supply adaptor input 12V exports 5V/3.3V/1.8V, and this 3 part all comprises some energy-storage travelling wave tubes, needs to consider safety issue.The present embodiment advertisement machine takes following measures to ensure safety: the backlight power supply of display and the design of 12V primary power are become Flameproof and intrinsically safe power supply, and circuit unit is placed in separately flame proof box hat, exports the voltage and current supply display of essential safety; Do to limit can design the energy-storage travelling wave tube of display interior adapter and audio power amplifier circuit (the two maximum working voltage 12V), make electric capacity be no more than 33uF, inductance is no more than 100uH, so namely meets intrinsic safety requirement.
Further; described input power unit comprises: for control power supply long-distance anti-explosion type panel switches, be converted to the ACDC voltage module of DC voltage, DCDC voltage module, rapid safety silk, voltage dependent resistor and the ground protection for step-down for electric main, described ACDC voltage module connects and described DCDC voltage module.
Specifically, input power element circuit schematic diagram as shown in Figure 2, in order to ensure power supply safety, needing to arrange panel switches KK at harbor (such as office), so also making advertisement machine have independently-powered, does not affect by illumination start-stop etc.As adopted drone version switch and being placed in 2nd district, need to possess explosive-proof protector type Ex (d) II A.Rapid safety silk FA; voltage dependent resistor MOR and (ETH) ground connection form surge or lightning protected; alternating current 220V produces VD=12.5VDC by ACDC voltage module and DCDC voltage module; two-stage isolation ensures that input and output dielectric strength is not less than 1500VAC, and has heightened the source/load regulation of power supply.12.5VDC exports and supplies protective circuit of voltage regulation unit and backlight inverter unit respectively.
Further; described protective circuit of voltage regulation unit comprises: timer, comparer, sampling resistor and switching tube; described comparer is connected to described sampling resistor, described timer; for the electric current of more described sampling resistor; and triggering switch described in described Timer Controlling, described timer connects and described switching tube.
Specifically, as shown in Figure 3, primary power protection circuit is cut-off automatic recovery type, carries out duplicate protection to the output short-circuit of input power and overcurrent/overvoltage.Wherein, R1, R2, R3 form current sample, when output current exceedes protection threshold value; 2.1A is selected in the present embodiment; comparer OP1A output switching activity, shot timers TM driving switch pipe Q1, Q2 turn off, and TM recloses through time delay rear drive switching tube Q1, Q2.If output short-circuit, comparer OP2A is turned off by Q4 driving switch pipe Q3, realizes overcurrent and short-circuit protection.OP1B drives Q3 to turn off and realizes overvoltage protection.In the present embodiment, the intrinsic safety parameter of primary power protection circuit is: Uo1=12.5V, Io1=2.1A, Ci1=4.7uF, Lo1=0.1mH.
Further, described backlight inverter unit comprises: PWM controller chip, inductance, Schottky Rectifier, switch mosfet, described PWM controller chip connects respectively at described inductance, described switch mosfet, and the described inductance other end connects described Schottky Rectifier, and the described switch mosfet other end connects described Schottky Rectifier.
Specifically, as shown in Figure 4, the integrated chip U1 of model BIT3260 is adopted to coordinate energy storage inductor L1, schottky diode D2, D3 and switching tube Q10 complete the function that 12.5VDC exports to constant current source, this chip operation pattern is PWM, by inn pin input overcurrent sampled signal (R11 voltage establishes 0.2V threshold value in exceeding), forms width modulation through internal error amplifier driving switch circuit, reach constant current output object (the every road 150mA of the machine, totally 2 tunnels).U1 comprises pressure limiting pin OCP (threshold value 0.5V) simultaneously, controls output be no more than setting voltage, backlight electric power pressure limiting 38V in the present embodiment by R7, R6 bleeder circuit.And frequency adjustment pin ffq obtains different modulating frequency by changing R9.The pin ea of U1 is enable control end, and pin inn is constant flow regulation end, responds display main board output signal EA and ADJ respectively, realizes control and open/stop and brightness control function.
Further; described backlight output protection circuit unit comprises: for breaking circuit MOS switching tube and the prover pipe of reference voltage is provided; for load current being converted into the current sampling resistor of voltage; for more described voltage and reference tube voltage; and drive the comparer that described MOS switching tube turns off; described current sampling resistor one end connects backlight inverter unit, and the other end connects described comparer, and the comparer other end connects described MOS switching tube.
Specifically, as shown in Figure 5, the function of backlight output protection circuit carries out limit to backlight translation circuit output VS to export to reach intrinsic safety.The dual short circuit of same employing or overcurrent protection, and overvoltage shutdown mode.Ultimate principle and protective circuit of voltage regulation unit class are together; difference is that timing circuit increases malfunction (short circuit/overcurrent/overvoltage/disconnection) and protects auto-lock function; connect mainboard EA control end by D1, realize the export-restriction of malfunction backlight electric power, reach reliably protecting object.Backlight output protection circuit is totally 2 tunnels, and export (the bar-shaped LED backlight that built-in two of driving display are discrete) to 2 tunnel backlights conversion respectively and protect, in the present embodiment, its intrinsic safety parameter is Uo=38V, Io=200mA.
Each part mentioned above circuit unit is installed in the flame proof box hat of speciality, constitutes flame proof and to hold concurrently the supporting power supply of this case escope.Thus not needing display peripheral hardware explosion isolation device, the explosion-proof advertisement machine weight in the present embodiment is 15 kilograms, and screen size can reach 50 cun.
The utility model achieves the explosion-proof problem of advertisement machine and expands the size of display screen, alleviates the weight of explosion-proof advertisement machine.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (6)
1. an intrinsic safe explosion-proof advertisement machine, is characterized in that, comprising:
For presenting advertising content intrinsic safety type display, for providing the flame-proof type intrinsically safe power supply of power supply to described display, described power supply is connected with described display by twisted-pair feeder,
Described power supply comprises: for provide the input power unit of power supply, for the protection of described input power unit protective circuit of voltage regulation unit, for control external voltage signal open and adjusting backlight luminance backlight inverter unit, for the protection of the backlight output protection circuit unit of described backlight inverter unit and explosion-resistant enclosure;
Described input power unit is connected respectively at described protective circuit of voltage regulation unit, backlight inverter unit, and described backlight inverter unit is connected with described backlight output protection circuit unit.
2. advertisement machine according to claim 1; it is characterized in that; described input power unit comprises: for control power supply long-distance anti-explosion type panel switches, be converted to the ACDC voltage module of DC voltage, DCDC voltage module, rapid safety silk, voltage dependent resistor and the ground protection for step-down for electric main, described ACDC voltage module is connected to described DCDC voltage module.
3. advertisement machine according to claim 1 and 2; it is characterized in that; described protective circuit of voltage regulation unit comprises: timer, comparer, sampling resistor and switching tube; described comparer is connected to described sampling resistor, described timer; for the electric current of more described sampling resistor; and triggering switching tube described in described Timer Controlling to reach protective effect, described timer is connected to described switching tube.
4. advertisement machine according to claim 1 and 2, it is characterized in that, described backlight inverter unit comprises: PWM controller chip, inductance, Schottky Rectifier, switch mosfet, described PWM controller chip connects respectively at described inductance, described switch mosfet, the described inductance other end connects described Schottky Rectifier, and the described switch mosfet other end connects described Schottky Rectifier.
5. advertisement machine according to claim 1 and 2; it is characterized in that; described backlight output protection circuit unit comprises: for breaking circuit MOS switching tube and the prover pipe of reference voltage is provided; for load current being converted into the current sampling resistor of voltage; for more described voltage and reference tube voltage; and drive the comparer that described MOS switching tube turns off; described current sampling resistor one end connects backlight inverter unit; the other end connects described comparer, and the comparer other end connects described MOS switching tube.
6. advertisement machine according to claim 4, is characterized in that, described PWM controller chip model is BIT3260.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520305667.2U CN204596346U (en) | 2015-05-12 | 2015-05-12 | Intrinsic safe explosion-proof advertisement machine |
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| CN201520305667.2U CN204596346U (en) | 2015-05-12 | 2015-05-12 | Intrinsic safe explosion-proof advertisement machine |
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| CN204596346U true CN204596346U (en) | 2015-08-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106741986A (en) * | 2016-12-21 | 2017-05-31 | 太原航空仪表有限公司 | The bar device that shakes with driving function |
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2015
- 2015-05-12 CN CN201520305667.2U patent/CN204596346U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106741986A (en) * | 2016-12-21 | 2017-05-31 | 太原航空仪表有限公司 | The bar device that shakes with driving function |
| CN106741986B (en) * | 2016-12-21 | 2023-08-29 | 太原航空仪表有限公司 | Rod vibrator with driving function |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180615 Address after: 100029 room 7, 7 building, 8 building, No. 2, Sheng Gu Road, Chaoyang District, Beijing. Patentee after: Beijing Hai Yun times science and Technology Co., Ltd. Address before: 116000 floor 12, B block, Torch Road business building, Dalian new hi tech park, Liaoning. Patentee before: Zeng Wei |
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| TR01 | Transfer of patent right |