CN206940139U - A kind of load-carrying detection means - Google Patents
A kind of load-carrying detection means Download PDFInfo
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- CN206940139U CN206940139U CN201621460833.7U CN201621460833U CN206940139U CN 206940139 U CN206940139 U CN 206940139U CN 201621460833 U CN201621460833 U CN 201621460833U CN 206940139 U CN206940139 U CN 206940139U
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- carrying detection
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Abstract
The utility model discloses a kind of load-carrying detection means, the device includes：Sensor module, pressure data is gathered using multiple pressure sensors for being arranged at measured object；Signal amplification circuit, the pressure data that the sensor module gathers is amplified processing；A/D convertor circuit, the electric signal that the analog electrical signal after the amplification that the signal amplification circuit is exported is converted to numeral are sent to microprocessing unit；Microprocessing unit, obtains the digital electric signal of A/D convertor circuit output, and the pressure data of acquisition is sent into host side by radio receiving transmitting module；Radio receiving transmitting module, with host side radio communication, pass through the utility model so that the detection of elevator loading is more accurate, improves the security performance of elevator.
Description
Technical field
A kind of load-carrying detection means is the utility model is related to, more particularly to a kind of elevator load detection device.
Background technology
The basic equipment that elevator transports as modern high-rise building, bear be people and cargo transport responsibility, therefore, electricity
The security of ladder operation is particularly significant.With the quick popularization of skyscraper, elevator gos deep into our daily life, to people
Live and work provide comfortable, quick convenient service, meanwhile, because it is directly connected to the life security of passenger, electricity
The security performance of ladder operation is increasingly paid attention to by people, and an importance for influenceing elevator safety performance is exactly elevator
Load-carrying, therefore the load-carrying detection of elevator is particularly important.
Prior art detects to elevator loading, is broadly divided into three kinds of methods：First, it is computer room in traction elevator
Detect the traction of elevator and the tension force of elevator wire rope causes the deformation of sensor to export the load signal of elevator；2nd, lead to
The deformation at over-pressed force sensor measuring elevator cab movable bridge bottom obtains the loading capacity of elevator；3rd, sentenced by microswitch
It is disconnected whether to be fully loaded with.
However, there is following defect in above-mentioned prior art：1st, the tension force of the traction of traction elevator and elevator wire rope
Coefficient of balance of greasy dirt, elevator between harmony, the groove of traction sheave, steel wire rope conjunction groove etc. has very big relation, preceding
State any one factor and change the change that can all cause traction, largely improve the difficulty of elevator reparing detection；2、
When single pressure sensor reads the deformation at elevator cab movable bridge bottom, when passenger institute station location inequality in bridge railway carriage or compartment, it will straight
Connecing causes measurement result to produce deviation；3rd, the accuracy of microswitch is relatively low.
Utility model content
To overcome above-mentioned the shortcomings of the prior art, the purpose of the utility model is to provide a kind of elevator loading detection
Device, make it that the detection of elevator loading is more accurate, improve the security performance of elevator.
For the above-mentioned purpose, the utility model proposes a kind of load-carrying detection means, including：
Sensor module, pressure data is gathered using multiple pressure sensors for being arranged at measured object, and collection is obtained
Pressure data be sent to signal amplification circuit；
Signal amplification circuit, the pressure data that the sensor module gathers is amplified processing, after enhanced processing
Pressure data is sent to A/D convertor circuit；
A/D convertor circuit, the analog electrical signal after the amplification that the signal amplification circuit is exported are converted to the telecommunications of numeral
Number, and it is sent to microprocessing unit；
Microprocessing unit, obtains the digital electric signal of A/D convertor circuit output, and the pressure data of acquisition is passed through
Radio receiving transmitting module is sent to host side；
Radio receiving transmitting module, with host side radio communication.
Further, the signal amplification circuit uses two-stage amplifying circuit, and first order amplifying circuit is put using two computings
The pressure data that big device composition homophase input differential circuit gathers to pressure sensor is amplified, and the two of second level amplifying circuit
Input connects the output end of two operational amplifiers of first order amplifying circuit respectively.
Further, the A/D convertor circuit includes variable connector and AD conversion module, the multichannel of the multicircuit switch
For the output end of interface connection signal amplification circuit to obtain the pressure data of each pressure sensor collection, the connection of its output port should
The input interface of AD conversion module, the AD conversion module obtain the number pressure of multiple sensors by switching multicircuit switch
According to, and the microprocessing unit will be sent into after its analog-to-digital conversion.
Further, the load-carrying detection means also includes filtration module, and the filtration module is connected to the signal amplification circuit
Between A/D convertor circuit.
Further, the load-carrying detection means also includes display unit, and the display unit connects the microprocessing unit.
Further, the measured object is elevator.
Further, the plurality of pressure sensor is arranged at the elevator cab bottom.
Further, the plurality of pressure sensor is 4 pressure sensors, is uniformly distributed in the upper of the elevator cab bottom
Surface.
Further, the pressure sensor is S type weighing sensor of the range in 0-500KG.
Further, the device also includes alarm module, and the alarm module connects the microprocessing unit.
Compared with prior art, a kind of load-carrying detection means of the utility model is uniformly divided by using multiple pressure sensors
It is distributed in elevator cab upper base surface collection loading capacity so that the collection of data is more accurate, by using multiple sensors, energy
The output of multi-group data is enough contrasted, when data difference is larger, can deduce whether component aging or damage occurs, avoid
Misrepresent deliberately the generation of failing to report phenomenon, while reduce the difficulty of elevator reparing detection, and the utility model passes through wireless communication technology
Data are collected, excavation study can be carried out to mass data.
Brief description of the drawings
Fig. 1 is a kind of system construction drawing of load-carrying detection means of the utility model；
Fig. 2 is the thin portion circuit diagram of signal amplification circuit 102 in the utility model specific embodiment；
Fig. 3 is the thin portion circuit diagram of A/D convertor circuit in the utility model specific embodiment；
Fig. 4 is data frame structure schematic diagram in the utility model specific embodiment.
Embodiment
Below by way of specific instantiation and embodiment of the present utility model, people in the art is described with reference to the drawings
Member can be understood further advantage and effect of the present utility model easily by content disclosed in the present specification.The utility model also may be used
Implemented or applied by other different instantiations, the various details in this specification can also be based on different viewpoints with answering
With, without departing substantially from it is of the present utility model spirit under carry out it is various modification and change.
Fig. 1 is a kind of system construction drawing of load-carrying detection means of the utility model.As shown in figure 1, the utility model is a kind of
Load-carrying detection means, the load-carrying of elevator is can be applied to, including：Sensor module 101, signal amplification circuit 102, A/D convertor circuit
103rd, microprocessing unit 104 and radio receiving transmitting module 105.
Wherein, sensor module 101, pressure data is gathered using multiple pressure sensors for being arranged at measured object, and will
The pressure data that collection obtains is sent to signal amplification circuit 102, and in the utility model specific embodiment, the measured object is electricity
Ladder, multiple pressure sensors are uniformly arranged on elevator cab bottom, to gather the load signal of elevator, and are sent to signal
Amplifying circuit, it is preferred that the quantity of pressure sensor is advisable with 4, but it is not limited.It is embodied in the utility model
In example, it is contemplated that the cost of pressure sensor, the loading capacity of elevator, wait the composite factors such as terraced space, selected from range 0-
500KG S types weighing sensor (LC101-500), it uses the pressure sensor metering system of strain chip, passes through foil gauge
Miniature deformation of resistance detection metal when being pressurized measure weight signal, obtain pressure information, be converted to electric signal and be sent into letter
Number amplifying circuit 102.
Signal amplification circuit 102, the pressure data for sensor module 101 to be gathered are amplified processing, will amplify
Pressure data after processing is sent to A/D convertor circuit 103.Because the electric signal of pressure sensor collection is fainter, therefore this
The electric signal that utility model is gathered using signal amplification circuit 102 to pressure sensor is amplified.
Fig. 2 is the thin portion circuit diagram of signal amplification circuit 102 in the utility model specific embodiment.Table 1 below is this reality
Illustrated with the network label and corresponding ports of signal amplification circuit in new specific embodiment.
Table 1
In the utility model specific embodiment, signal amplification circuit 102 includes two-stage amplifying circuit, first order amplification electricity
Road enters one using operational amplifier A 1, A2 composition homophase input differential circuits, second level amplifying circuit using operational amplifier A 3
Step improves multiplication factor, its very high input impedance and very high common-mode rejection ratio and open-loop gain, specifically, pressure sensing
Both positive and negative polarity Ui+, Ui- of device output voltage make with mutually amplification, electricity through operational amplifier A 1, A2 again after R3a, R3b ground connection respectively
Resistance R4a, R4b and adjustable resistance RW makees the load of amplifier A1, A2, adjustment RW can balanced two amplifiers load, with mutually putting
Large gain isOutput voltage is poor
Wherein R4a=R4b=R, RWFor RW resistances, resistance R3a, R3b resistance R3, amplifier A1 output Uo1 are connected to through resistance R1a
Amplifier A3 reversed-phase output makees anti-phase amplification, and gain isWherein R2a, R2b resistance is R2, R1a, R1b resistance
The amplifier A3 same phase amplification of in-phase output end work is connected to through resistance R1b for R1, amplifier A2 output Uo2, gain isTherefore export and be
Adjust variable resistor RWValue can then adjust multiplication factor.
A/D convertor circuit 103, numeral is converted to for the analog electrical signal after the amplification that exports signal amplification circuit 102
Electric signal, and be sent to microprocessing unit 104.
In the utility model specific embodiment, A/D convertor circuit 103 includes multicircuit switch and AD moduluss of conversion
The output end of the multichannel interface connection signal amplification circuit 102 of block, wherein multicircuit switch is adopted with obtaining each pressure sensor
The pressure data of collection, its output port connect the input interface of AD conversion module, and AD conversion module is opened by switching multipath conversion
Close, obtain the pressure data of multiple sensors.In the utility model specific embodiment, multicircuit switch passes through four road interfaces
X0/X1/X2/X3 receives the amplified pressure data Uo1/Uo2/Uo3/Uo4 of four sensor collections, the output of its output port
Voltage U21 to AD conversion module input interface VIN (+), Fig. 3 be the utility model specific embodiment in multicircuit switch with
And the structural representation of AD conversion module.In the utility model specific embodiment, AD conversion module uses ADC0831 cores
Piece, multicircuit switch use 4052 chips, and its specific network label and corresponding ports are schematically as follows shown in table 2：
Table 2
Specifically, analog electrical signal is converted to digital electric signal by AD conversion module；Microprocessing unit control P1.1 ports
Level change (i.e. the clock pulses of the CLK ports of ADC0831), control ADC0831 chips serial transmission logic, from
P1.2 mouths read the data of D0 mouths, by switching multicircuit switch, obtain the pressure data of four sensors.
Microprocessing unit 104, for obtaining the pressure data of the output of A/D convertor circuit 103, according to multiple sensings of acquisition
The pressure data of device analyzes and processes to it, judges whether overweight, and carries out respective handling according to judged result, such as judges overweight
Prompted afterwards by warning system, or the door mechanism system of notice elevator is handled, and microprocessing unit 104 will also obtain
Pressure data host side is sent to by radio receiving transmitting module.Specifically, microprocessing unit 104 obtains all the sensors and adopted
The pressure data of collection, and the data that each sensor is gathered are added up, by the data after totalling and the maximum load of default elevator
Weight threshold value is compared, and judges that current elevator is in overweight state when more than the elevator maximum load threshold value, passes through alarm system
System is prompted.Because microprocessing unit is calculated as existing technology to the totallings of data and comparison, will not be described here.
Radio receiving transmitting module 105, for the load-carrying detection means and the radio communication of host side.
In general, self-interference in short-term occurs in radio receiving transmitting module 105 when State Transferring is carried out, mainly
Because：
1st, when transceiver module is converted into reception pattern by sending mode, even if being not on other transmitting-receiving moulds of same channel
Block sends data, and the module can also receive some byte datas.
2nd, when transceiver module is converted into sending mode by reception pattern, even if not to other transmitting-receivings in same channel
Module sends data, and other transceiver modules in a receive mode can also receive some byte datas.
So it must ensure that data are correctly transmitted by reliable transmission mechanism, neglect due to the presence of interference and connect
The data received.In the utility model specific embodiment, entered using the data frame format comprising pre-determined synchronization domain and domain
Row sends data, specifically, sends the frame structure of data as shown in figure 4, wherein, synchronization field is by sending some byte 0x55
(synchronization field) notifies receiving terminal to send data, is received in the domain of data frame by sending 0xAA (domain) notice
End lead data is over, and next starts to send valid data.Data field is the valid data to be sent.
(1) data are sent
In the utility model specific embodiment, the load-carrying detection means of the utility model is used as from generator terminal, passes through channel 1
Data transmission is carried out, pressure data sends form as shown in Figure 4.Response for host side pressure data acquisition instructions, data
Domain is the pressure data collected, and length is depending on data precision.
For host side, the transmission of order data is carried out by channel 2.Now data field is subdivided into address code and order
Code.The system of the utility model is one master and multiple slaves structure, i.e., a host side controls multiple data from generator terminal to send simultaneously, because
This needs to distribute a unique address from generator terminal to each, determines to need the slave for receiving order with address code.Order
Code is sent to the order from generator terminal for host side, and corresponding operation is performed from generator terminal according to the order received.
(2) data receiver
Because transceiver module can produce interference when carrying out patten transformation, receive other modules for being in reception state
Due to invalid data caused by interference.Therefore, when receiving data, the synchronization field and domain of data frame can be judged,
It will ignore all data received when not receiving default data-frame sync domain with originating numeric field data.
It is preferred that the load-carrying detection means of the utility model also includes display unit, microprocessing unit 104 is connected, is used for
The result of microprocessing unit is shown, display unit can show the pressure data values of each pressure sensor collection,
Result of the microprocessing unit 104 to pressure data can be shown, such as shows overweight numerical value etc., the utility model is not with this
It is limited.
It is preferred that the load-carrying detection means of the utility model also includes filtration module, filtration module is connected to signal amplification
The output end of circuit 102 is new in this practicality to filter high-frequency noise and Hz noise in the signal of signal amplification circuit output
In type specific embodiment, filter circuit only allows 0.8~38Hz signal by filtering the high-frequency noise in signal and power frequency being done
Disturb.
In summary, a kind of load-carrying detection means of the utility model is uniformly distributed in electricity by using multiple pressure sensors
Terraced bridge railway carriage or compartment upper base surface collection loading capacity so that the collection of data is more accurate, by using multiple sensors, can contrast
The output of multi-group data, it when data difference is larger, can deduce whether component aging or damage occurs, avoid and misrepresent deliberately
The generation of failing to report phenomenon, while the difficulty of elevator reparing detection is reduced, and the utility model collects number by wireless communication technology
According to so as to carry out excavation study to mass data.
Above-described embodiment only illustrative principle of the present utility model and its effect are new not for this practicality is limited
Type.Any those skilled in the art can repair without prejudice under spirit and scope of the present utility model to above-described embodiment
Decorations and change.Therefore, rights protection scope of the present utility model, should be as listed by claims.
Claims (10)
1. a kind of load-carrying detection means, including：
Sensor module, pressure data is gathered using multiple pressure sensors for being arranged at measured object, and the pressure obtained will be gathered
Force data is sent to signal amplification circuit；
Signal amplification circuit, the pressure data that the sensor module gathers is amplified processing, by the pressure after enhanced processing
Data are sent to A/D convertor circuit；
A/D convertor circuit, the analog electrical signal after the amplification that the signal amplification circuit is exported are converted to the electric signal of numeral, and
It is sent to microprocessing unit；
Microprocessing unit, obtains the digital electric signal of A/D convertor circuit output, and the pressure data of acquisition is passed through wireless
Transceiver module is sent to host side；
Radio receiving transmitting module, with host side radio communication.
A kind of 2. load-carrying detection means as claimed in claim 1, it is characterised in that：The signal amplification circuit is amplified using two-stage
Circuit, the pressure that first order amplifying circuit is gathered using two operational amplifiers composition homophase input differential circuits to pressure sensor
Force data is amplified, and two inputs of second level amplifying circuit connect two operational amplifiers of first order amplifying circuit respectively
Output end.
A kind of 3. load-carrying detection means as claimed in claim 2, it is characterised in that：The A/D convertor circuit include variable connector with
And AD conversion module, the output end of the multichannel interface connection signal amplification circuit of the multicircuit switch is to obtain each pressure sensing
The pressure data of device collection, its output port connect the input interface of the AD conversion module, and the AD conversion module is more by switching
Road change-over switch, the pressure data of multiple sensors is obtained, and the microprocessing unit will be sent into after its analog-to-digital conversion.
A kind of 4. load-carrying detection means as claimed in claim 1, it is characterised in that：The load-carrying detection means also includes filtering mould
Block, the filtration module are connected between the signal amplification circuit and A/D convertor circuit.
A kind of 5. load-carrying detection means as claimed in claim 1, it is characterised in that：It is single that the load-carrying detection means also includes display
Member, the display unit connect the microprocessing unit.
A kind of 6. load-carrying detection means as claimed in claim 1, it is characterised in that：The measured object is elevator.
A kind of 7. load-carrying detection means as claimed in claim 6, it is characterised in that：The plurality of pressure sensor is arranged at the electricity
Terraced bridge railway carriage or compartment bottom.
A kind of 8. load-carrying detection means as claimed in claim 7, it is characterised in that：The plurality of pressure sensor is 4 pressure
Sensor, it is uniformly distributed in the upper surface of the elevator cab bottom.
A kind of 9. load-carrying detection means as claimed in claim 8, it is characterised in that：The pressure sensor be range 0-
500KG S type weighing sensors.
A kind of 10. load-carrying detection means as claimed in claim 1, it is characterised in that：The device also includes alarm module, the report
Alert module connects the microprocessing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621460833.7U CN206940139U (en) | 2016-12-28 | 2016-12-28 | A kind of load-carrying detection means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621460833.7U CN206940139U (en) | 2016-12-28 | 2016-12-28 | A kind of load-carrying detection means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206940139U true CN206940139U (en) | 2018-01-30 |
Family
ID=61357593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621460833.7U Active CN206940139U (en) | 2016-12-28 | 2016-12-28 | A kind of load-carrying detection means |
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| Country | Link |
|---|---|
| CN (1) | CN206940139U (en) |
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2016
- 2016-12-28 CN CN201621460833.7U patent/CN206940139U/en active Active
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