CN206471050U - A kind of early warning sand table against pressure - Google Patents
A kind of early warning sand table against pressure Download PDFInfo
- Publication number
- CN206471050U CN206471050U CN201720067416.4U CN201720067416U CN206471050U CN 206471050 U CN206471050 U CN 206471050U CN 201720067416 U CN201720067416 U CN 201720067416U CN 206471050 U CN206471050 U CN 206471050U
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- Prior art keywords
- sand table
- protective cover
- signal
- early warning
- against pressure
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Abstract
The utility model discloses a kind of early warning sand table against pressure, including sand table frame and protective cover, mounting groove is provided with sand table frame; fluid cushion pad is provided with mounting groove; the lower end of protective cover is abutted against with fluid cushion pad, and early warning sand table against pressure also includes intelligence system against pressure, and intelligence system against pressure includes：Signal detecting unit, signal is detected for detecting the hydraulic pressure in fluid cushion pad, and in its output end output hydraulic pressure；Processing unit, is coupled to the output end of signal detecting unit, judges whether protective cover is in by pressure condition according to signal detecting signal, and export corresponding status signal in its output end；Reminding unit, is coupled to the output end of processing unit, for reception state signal, and sends corresponding cue according to status signal；The utility model by fluid cushion pad and intelligence system against pressure with can send cue when being fated on protective cover and being pressed with weight in time, and with precision is high, Stability Analysis of Structures and cue intuitively advantage.
Description
Technical field
The utility model is related to physical model displaying field, more specifically, it relates to a kind of early warning sand table against pressure.
Background technology
Sand table is according to topographic map, airphoto or landform relation silt, war game and other according to a certain percentage on the spot
The model of material composting, it is general main including base, sand table frame and the protective cover being arranged on sand table frame.Due in actual life
In, the phenomenon lain prone on the protective cover of sand table is had in the visitor for visiting sand table, very big extruding force is produced to protective cover, it is right
Sand table produces very big potential safety hazard.
Disclosed in Publication No. CN204611607U Chinese patent one kind put on the table provide micro-landscape it is glad
Reward and LED illumination landscape desk lamp, it by cylindrical base, the micro scenery of submounts, hemisphere bodily form transparent glass cover,
Two groups of hiding colour temperature LED/light sources at the top of cloche, the liquid crystal digital display of base side, control button panel, in base
Clock circuit, controller, loudspeaker and the power supply unit in portion etc. are constituted.The hemisphere bodily form transparent glass cover of the utility model is entering
During row displaying, the phenomenon lain prone for being had in visitor on the protective cover of sand table lacks corresponding safeguard measure, and sand table is produced
Give birth to very big potential safety hazard.
Utility model content
, can be with view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of early warning sand table against pressure
Corresponding safeguard measure is made to the phenomenon that the protective cover of sand table is under pressure.
To achieve the above object, the utility model provides following technical scheme：
Mounting groove, the installation are provided with a kind of early warning sand table against pressure, including sand table frame and protective cover, the sand table frame
Fluid cushion pad is provided with groove, the lower end of the protective cover is abutted against with the fluid cushion pad, the early warning sand table against pressure
Also include intelligence system against pressure, the intelligence system against pressure includes：Signal detecting unit, for detecting the liquid in fluid cushion pad
Pressure, and detect signal in its output end output hydraulic pressure；Processing unit, is coupled to the output end of signal detecting unit, according to described
Signal detecting signal judges whether the protective cover is in by pressure condition, and exports corresponding status signal in its output end；
Reminding unit, is coupled to the output end of the processing unit, is sent out for receiving the status signal, and according to the status signal
Go out corresponding cue.
By using above-mentioned technical proposal, when there is weight to be pressed on protective cover, one side fluid cushion pad is to protective cover
Suffered pressure has carried out certain cushioning effect, and certain protective effect is served to protective cover and early warning sand table against pressure；Together
Shi Zhineng systems against pressure can be by the load-bearing conditions of the hydraulic pressure indirect detection in fluid cushion pad to protective cover, and by sending
Corresponding cue points out to remove weight, so as to reach the purpose of the protection early warning sand table against pressure.
Further, the vertical groove being connected with the mounting groove is provided with the sand table frame, the protective cover
Lower end is abutted against through the vertical groove with the fluid cushion pad, the lower gap of the vertical groove and the protective cover
Coordinate.
By using above-mentioned technical proposal, by position-limiting action of the vertical groove to protective cover, overall structure can be made more
Plus stably, protective cover can only be moved up and down along vertical groove.
Further, the bottom of the protective cover is provided with abuts for the extension abutted against with the fluid cushion pad
Side.
By using above-mentioned technical proposal, lower end and the fluid cushion pad of protective cover can be increased by extending abutting side
Contact area, makes being more uniformly stressed for fluid cushion pad, adds the service life of fluid cushion pad；Supported additionally, due to extension
The snap effect of edge fit and the mounting groove inwall of vertical groove both sides, can prevent the bottom of protective cover from departing from when moving up and down
To outside vertical groove.
Further, the pressure that the signal detecting unit includes being arranged on detection probe in the fluid cushion pad is passed
Sensor, the signal detecting signal is exported in the output end of the pressure sensor, the magnitude of voltage of the signal detecting signal with
Hydraulic pressure in the fluid cushion pad is directly proportional.
By using above-mentioned technical proposal, by due to the pressure in liquid it is equal everywhere, so in any position of protective cover
Putting the pressure being subject to can be sharp, timely and accurate by pressure sensor after the conduction of the liquid in fluid cushion pad
Detect.
Further, the processing unit includes：Reference voltage generating circuit, with a first resistor R1, its one end coupling
Direct current VCC is connected to, the other end is grounded after being connected with a second resistance R2, produced between first resistor R1 and second resistance R2
One reference voltage；Comparator A, with an in-phase input end, an inverting input and an output end, the in-phase input end coupling
In the output end of pressure sensor, inverting input is coupled between first resistor R1 and second resistance R2, output end output institute
State status signal.
By using above-mentioned technical proposal, the magnitude of voltage of the signal detecting signal exported due to pressure sensor and hydraulic pressure into
Direct ratio, generates reference voltage compared with signal detecting signal, when signal detecting signal is more than by reference to voltage generation circuit
During reference voltage, comparator A exports the status signal of high level, and when signal detecting signal is less than reference voltage, comparator A is defeated
Go out low level status signal, so as to reach the purpose for the stressing conditions for differentiating protective cover.
Further, the reminding unit includes：NPN triode Q1, its grounded emitter, base stage passes through a 3rd resistor
R3 is coupled to comparator A output end；LED 1, its anode is electrically coupled with direct current VCC, and negative electrode passes through one the 4th
Resistance R4 is coupled to the colelctor electrode of NPN triode Q1；NPN triode Q2, its grounded emitter, base stage passes through one the 5th resistance R5
It is coupled to comparator A output end；Buzzer H1, its one end is coupled to direct current VCC, and the other end passes through one the 6th resistance R6 couplings
It is connected to NPN triode Q2 colelctor electrode.
By using above-mentioned technical proposal, when protective cover is under pressure and signal detecting signal is more than reference voltage, than
Compared with the status signal that device A exports high level after NPN triode Q1 and NPN triode Q2 amplifications, so that switched-on light emitting diodes
LED1 and buzzer H1 remove weight to send acousto-optic hint signal to remind, so as to reach the protection early warning sand table against pressure
Purpose.
Further, the status signal that the reminding unit includes exporting the processing unit is sent to monitor terminal
Wireless communication module.
By using above-mentioned technical proposal, the status signal that processing unit is exported is sent to prison by wireless communication module
Control terminal, so that the care provider of monitor terminal can recognize the stressing conditions of protective cover in real time, when protective cover is by weight
During pressure, care provider can in time recognize and come to remind or remove related weight, so as to reach that protection is described against pressure pre-
The purpose of alert sand table.
Further, first resistor R1 is variable resistance.
By using above-mentioned technical proposal, by adjusting first resistor R1, thus it is possible to vary the size of reference voltage, so as to reach
The protective cover load-bearing threshold value reminded and removed corresponding to the cue of weight is sent to regulation reminding unit, makes intelligence system against pressure
System is more accurate for the judgement of protective cover load-bearing.
Further, the protective cover is made up of multiple pieces of glass plate, and the LED 1 faces the glass
The section of plate.
By using above-mentioned technical proposal, it can be irradiated when LED 1 lights from the section of glass plate, from
And whole glass plate is illuminated, make one more can intuitively be clearly observed the cue that intelligence system against pressure is sent.
Compared with prior art, the utility model has the advantages that：
（1）Being abutted in the lower end of protective cover has fluid cushion pad, when there is weight to be pressed on protective cover, fluid cushion pad pair
Pressure suffered by protective cover has carried out certain cushioning effect, and certain protection is served to protective cover and early warning sand table against pressure and is made
With；
（2）Intelligence system against pressure is provided with, when there is weight to be pressed on protective cover, sends corresponding cue to point out
Weight is removed, so as to reach the purpose of the protection early warning sand table against pressure；
（3）It is provided with vertical groove and comes spacing to protective cover, so that overall structure is more stablized；
（4）The extension abutted against with fluid cushion pad is provided with the bottom of protective cover and abuts side, fluid cushion is added
The service life of pad, and prevent the lower end of protective cover from departing from vertical groove, so as to reach more preferable protection to early warning sand table against pressure
Effect；
（5）LED 1 faces the section of the glass plate, can be illuminated when LED 1 lights whole
Individual glass plate, makes one more can intuitively be clearly observed the cue that intelligence system against pressure is sent.
Brief description of the drawings
Fig. 1 is the structural representation of early warning sand table against pressure in embodiment one；
Fig. 2 is the enlarged drawing in A portions in Fig. 1；
Fig. 3 is the top view of early warning sand table against pressure in embodiment one；
Fig. 4 is the sectional view of the line C-C along along Fig. 3;
Fig. 5 is the circuit diagram of intelligence system against pressure in embodiment one；
Fig. 6 is the circuit diagram of intelligence system against pressure in embodiment two.
Reference：1st, sand table frame；2nd, glass plate；3rd, protective cover；4th, mounting groove；5th, fluid cushion pad；6th, extension is abutted
Side；7th, vertical groove；8th, intelligence system against pressure；9th, signal detecting unit；10th, processing unit；11st, reminding unit；12nd, with reference to electricity
Press generative circuit.
Embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
Embodiment one, a kind of shown as shown in Figure 1, Figure 3 and Figure 4, early warning sand table against pressure, including sand table frame 1 and by multiple pieces of glass
Offered in the protective cover 3 that plate 2 is constituted, the sand table frame 1 in mounting groove 4, the mounting groove 4 and fluid cushion pad 5, institute are installed
The bottom for stating protective cover 3 is fixed with and abuts side 6 for the extension abutted against with the fluid cushion pad 5.On the sand table frame 1 also
The vertical groove 7 being connected with the mounting groove 4 is offered, the lower end of the protective cover 3 passes through the vertical groove 7, and makes
Extension abuts side 6 and abutted against with the fluid cushion pad 5.The lower gap of the vertical groove 7 and the protective cover 3 coordinates.
By position-limiting action of the vertical groove 7 to protective cover 3, overall structure can be made more to stablize, protective cover 3 only can be along vertical
Groove 7 is moved up and down., can be with further, since extension abuts the snap effect of the inwall of mounting groove 4 of side 6 and the vertical both sides of groove 7
Prevent the bottom of protective cover 3 from departing from when moving up and down to outside vertical groove 7.
As shown in figure 5, the early warning sand table against pressure also includes intelligence system 8 against pressure, the intelligence system 8 against pressure includes：
Signal detecting unit 9, signal is detected for detecting the hydraulic pressure in fluid cushion pad 5, and in its output end output hydraulic pressure；Processing is single
Member 10, is coupled to the output end of signal detecting unit 9, judges whether the protective cover 3 is located according to the signal detecting signal
Corresponding status signal is exported in by pressure condition, and in its output end；Reminding unit 11, is coupled to the defeated of the processing unit 10
Go out end, corresponding cue is sent for receiving the status signal, and according to the status signal.
The signal detecting unit 9 includes pressure sensor detection probe being arranged in the fluid cushion pad 5,
The output end of the pressure sensor exports the signal detecting signal, the magnitude of voltage and fluid cushion of the signal detecting signal
Hydraulic pressure in pad 5 is directly proportional.By due to the pressure in liquid it is equal everywhere, so the pressure being subject in the optional position of protective cover 3
Power can be sharp, timely by pressure sensor after the conduction of the liquid in fluid cushion pad 5 and accurately detected.
As shown in figure 5, the processing unit 10 includes：Reference voltage generating circuit 12, with a first resistor R1, first
Resistance R1 is variable resistance, and its one end is coupled to direct current VCC, ground connection after the other end is connected with a second resistance R2, from the
A reference voltage is produced between one resistance R1 and second resistance R2；Comparator A, with an in-phase input end, an inverting input
And an output end, the in-phase input end is coupled to the output end of pressure sensor, and inverting input is coupled to first resistor R1
Between second resistance R2, output end exports the status signal.By adjusting first resistor R1, thus it is possible to vary reference voltage
Size, so as to reach that regulation reminding unit 11 sends the load-bearing threshold of protective cover 3 reminded and removed corresponding to the cue of weight
Value, makes intelligence system 8 against pressure more accurate for the judgement of the load-bearing of protective cover 3.
In foregoing circuit, first comparator A is active voltage comparator, and power access end is coupled to direct current VCC, is grounded
End ground connection.
The reminding unit 11 includes：NPN triode Q1, its grounded emitter, base stage is coupled by a 3rd resistor R3
In comparator A output end；LED 1, its anode is electrically coupled with direct current VCC, and negative electrode passes through one the 4th resistance R4
It is coupled to the colelctor electrode of NPN triode Q1；NPN triode Q2, its grounded emitter, base stage is coupled to by one the 5th resistance R5
Comparator A output end；Buzzer H1, its one end is coupled to direct current VCC, and the other end is coupled to by one the 6th resistance R6
NPN triode Q2 colelctor electrode.
As depicted in figs. 1 and 2, the LED 1 faces the section of the glass plate 2.Work as light emitting diode
LED1 can irradiate when luminous from the section of glass plate 2, so as to illuminate whole glass plate 2, making one can be more directly perceived and bright
The cue that intelligence system 8 against pressure is sent is observed aobviously.
The intelligence practical work process of system 8 against pressure of the present embodiment is as follows：
Because the magnitude of voltage of the signal detecting signal of pressure sensor output is directly proportional to hydraulic pressure, when protective cover 3 is pressed
When power and signal detecting signal are more than reference voltage, the status signal of comparator A output high level is through NPN triode Q1 and NPN
After triode Q2 amplifications, so that switched-on light emitting diodes LED1 and buzzer H1 reminds to send acousto-optic hint signal removes weight
Thing, so as to reach the purpose of the protection early warning sand table against pressure；Again after weight is removed, signal detecting signal, which is returned to, to be less than
After reference voltage, comparator A exports low level status signal, ends NPN triode Q1 and NPN triode Q2, and luminous two
Pole pipe LED1 and buzzer H1 disconnect, and stopping sends acousto-optic hint signal.
Embodiment two, as shown in figures 1 to 6, a kind of early warning sand table against pressure, the difference with embodiment one is, described to carry
The status signal that unit 11 of waking up includes exporting the processing unit 10 is sent to the wireless communication module of monitor terminal.Channel radio
Believe that module can use NRF24L01 chips, NRF24L01 chips are to be operated in 2.4GHz~2.5GHz's by what NORDIC was produced
The monolithic wireless transceiver chip of ISM band.Monitor terminal can be smart mobile phone or the PC ends of connection public network.
The status signal that processing unit 10 is exported is sent to monitor terminal by wireless communication module, so that monitoring is eventually
The care provider at end can recognize the stressing conditions of protective cover 3 in real time, when protective cover 3 is by weight, and care provider can be with
Recognize in time and come to remind the people being pressed on protective cover 3 to leave protective cover 3 or remove the weight being pressed on protective cover 3, from
And reached the purpose of the protection early warning sand table against pressure.
Described above is only preferred embodiment of the present utility model, and protection domain of the present utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to protection domain of the present utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (9)
1. a kind of early warning sand table against pressure, including sand table frame (1) and protective cover (3), it is characterised in that set in the sand table frame (1)
It is equipped with mounting groove (4), the mounting groove (4) and is provided with fluid cushion pad (5), lower end and the liquid of the protective cover (3)
Body cushion pad (5) is abutted against, and the early warning sand table against pressure also includes intelligence system (8) against pressure, intelligence system against pressure (8) bag
Include：
Signal detecting unit (9), believes for detecting the hydraulic pressure in fluid cushion pad (5), and being detected in its output end output hydraulic pressure
Number；
Processing unit (10), is coupled to the output end of signal detecting unit (9), according to being judged the signal detecting signal
Whether protective cover (3) is in by pressure condition, and exports corresponding status signal in its output end；
Reminding unit (11), is coupled to the output end of the processing unit (10), for receiving the status signal, and according to institute
State status signal and send corresponding cue.
2. a kind of early warning sand table against pressure according to claim 1, it is characterised in that be provided with the sand table frame (1) with
The vertical groove (7) that the mounting groove (4) is connected, the lower end of the protective cover (3) through the vertical groove (7) with it is described
Fluid cushion pad (5) is abutted against, and the vertical groove (7) and the lower gap of the protective cover (3) coordinate.
3. a kind of early warning sand table against pressure according to claim 2, it is characterised in that the bottom of the protective cover (3) is set
Have and abut side (6) for the extension abutted against with the fluid cushion pad (5).
4. a kind of early warning sand table against pressure according to claim 1, it is characterised in that the signal detecting unit (9) includes
Detection probe is arranged on the pressure sensor in the fluid cushion pad (5), exported in the output end of the pressure sensor
The signal detecting signal, the magnitude of voltage of the signal detecting signal is directly proportional to the hydraulic pressure in the fluid cushion pad (5).
5. a kind of early warning sand table against pressure according to claim 4, it is characterised in that the processing unit (10) includes：
Reference voltage generating circuit (12), with a first resistor R1, its one end is coupled to direct current VCC, the other end and one
It is grounded after two resistance R2 series connection, a reference voltage is produced between first resistor R1 and second resistance R2；
Comparator A, with an in-phase input end, an inverting input and an output end, the in-phase input end is coupled to pressure
The output end of sensor, inverting input is coupled between first resistor R1 and second resistance R2, and output end exports the state
Signal.
6. a kind of early warning sand table against pressure according to claim 5, it is characterised in that the reminding unit (11) includes：
NPN triode Q1, its grounded emitter, base stage is coupled to comparator A output end by a 3rd resistor R3；
LED 1, its anode is electrically coupled with direct current VCC, and negative electrode is coupled to the poles of NPN tri- by one the 4th resistance R4
Pipe Q1 colelctor electrode；
NPN triode Q2, its grounded emitter, base stage is coupled to comparator A output end by one the 5th resistance R5；
Buzzer H1, its one end is coupled to direct current VCC, and the other end is coupled to NPN triode Q2's by one the 6th resistance R6
Colelctor electrode.
7. a kind of early warning sand table against pressure according to claim 5, it is characterised in that the reminding unit (11) is included institute
The status signal for stating processing unit (10) output is sent to the wireless communication module of monitor terminal.
8. a kind of early warning sand table against pressure according to claim 1, it is characterised in that first resistor R1 is variable resistance.
9. a kind of early warning sand table against pressure according to claim 6, it is characterised in that the protective cover (3) is by multiple pieces of glass
Plate (2) is constituted, and the LED 1 faces the section of the glass plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720067416.4U CN206471050U (en) | 2017-01-19 | 2017-01-19 | A kind of early warning sand table against pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720067416.4U CN206471050U (en) | 2017-01-19 | 2017-01-19 | A kind of early warning sand table against pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206471050U true CN206471050U (en) | 2017-09-05 |
Family
ID=59705287
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720067416.4U Active CN206471050U (en) | 2017-01-19 | 2017-01-19 | A kind of early warning sand table against pressure |
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| Country | Link |
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| CN (1) | CN206471050U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109410685A (en) * | 2018-12-21 | 2019-03-01 | 无锡职业技术学院 | A kind of safety monitoring application test systems |
-
2017
- 2017-01-19 CN CN201720067416.4U patent/CN206471050U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109410685A (en) * | 2018-12-21 | 2019-03-01 | 无锡职业技术学院 | A kind of safety monitoring application test systems |
| CN109410685B (en) * | 2018-12-21 | 2023-08-29 | 无锡职业技术学院 | Security monitoring application test system |
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