CN202880601U - Detecting device for elevator weight - Google Patents
Detecting device for elevator weight Download PDFInfo
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- CN202880601U CN202880601U CN 201220495070 CN201220495070U CN202880601U CN 202880601 U CN202880601 U CN 202880601U CN 201220495070 CN201220495070 CN 201220495070 CN 201220495070 U CN201220495070 U CN 201220495070U CN 202880601 U CN202880601 U CN 202880601U
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Abstract
The utility model discloses a detecting device for elevator weight. The detecting device for the elevator weight comprises a plurality of weighing sensors, an analog-digital conversion module, a central processing unit (CPU) module and a communication module, wherein the weighing sensors are connected with the analog-digital conversion module, the analog-digital module is connected with the CPU module, and the communication module is connected with the CPU module. According to the detecting device for the elevator weight, due to the fact that digital communication technology is adopted, anti-jamming capability is strong, and actual effectiveness of data is guaranteed. In addition, due to the fact that the weighing sensors are installed on a steel belt, the detecting device is convenient to install. Meanwhile, due to the fact that multiple channel inputs are adopted, the detecting device can adapt to various elevators.
Description
Technical field
The utility model belongs to load weighing technology field, is specifically related to a kind of detecting device of elevator weight.
Background technology
In the elevator device of present vertical lift, the quantity of passenger is different in the car, the total weight of car is changed, and the landing of the elevator of vertical lift is to rely on the rotation of motor to realize output torque when the total weight of car directly has influence on electric motor starting.Be improved in order to improve stationarity and the traveling comfort of elevator in starting process, so all adopt weighting apparatus in the elevator device of now common vertical lift.
In the prior art, car load weigh the sensor probe of usefulness and square magnet steel be contained at the bottom of the sedan-chair below, also must be adjusted at the center of car, when debugging, need to be parked in the bottom appropriate location to car, then the personnel of debugging enter behind the pit sensor at the bottom of the sedan-chair are debugged, and for example adjust the distance between probe and the square magnet steel, operate so very inconvenient.Existing sensor probe and square magnet steel are contained in the beneath side of sedan-chair, deformation by the shock-absorbing rubber of face under the measurement sedan-chair detects car load, if such car load overbalance, center such as the position deviation car at passenger station in the car, cause being difficult to determine accurately the deformation quantity of rubber, cause the inaccurate of car load measurement.
Another weighting apparatus, utilize the car weight sensing element to sense the weight of car, outputting analog signal, again this analog signal is input to the frequency converter of machine room, frequency converter is exported different electric current (namely what is often called presets moment) according to the analog signal of this input, this electric current is exported in the motor of machine room, come the output torque of regulating electric machine, realize starting and the lifting of car.This shows, the total weight of sensing car is input in the frequency converter of machine room in the mode of analog signal, and by the different electric current of frequency converter output, this electric current is used for controlling the moment of motor, to realize the adjusting of motor torque under the different car weights.But this weighting apparatus shortcoming is: because car is longer to the distance of machine room, the analog signal that the car weight sensing element is exported can produce decay in the machine room transmittance process, makes the electric current generation deviation of frequency converter output, affects the precision that motor torque is regulated.
Therefore traditional weighting apparatus uses switching value output, it is whether overweight that elevator main control board receives only switching value input judgement, can not obtain actual weight; Adopt simultaneously analog signal transmission, see that interference performance is poor; LOAD CELLS is installed on the car, and installation wiring is very inconvenient.
Summary of the invention
For the existing above-mentioned technological deficiency of prior art, the utility model provides a kind of detecting device of elevator weight, and is easy for installation, and antijamming capability is strong.
A kind of detecting device of elevator weight comprises: a plurality of LOAD CELLS, an analog-to-digital conversion module and a CPU (central process unit) module; Described LOAD CELLS links to each other with analog-to-digital conversion module, and described analog-to-digital conversion module links to each other with the CPU module; Wherein:
A plurality of LOAD CELLS are installed on respectively on each bar steel band of elevator, and it is used for measuring the stress of steel band, thereby produce the simulation weight signal;
Described analog-to-digital conversion module is used for the simulation weight signal that each LOAD CELLS produces is carried out analogue to digital conversion, produces the multi-path digital weight signal;
Described CPU module is used for receiving each railway digital weight signal, and each railway digital weight signal is carried out adding up behind the digital filter, obtains the numerical information about the elevator total weight.
Described CPU module is connected with communication module, described communication module is connected on the communication bus, the CPU module will form data packet by communications protocol about the numerical information of elevator total weight and be sent to communication module, be sent to Master Control Center by communication module by communication bus.
It is the micro controller system of STM8S208S that described CPU module adopts model.
Preferably, described analog-to-digital conversion module employing model is the modulus conversion chip of ADS1241; Be characterized in that precision is high, have inner filter circuit, 24 Bit Significances have been removed amplifying circuit from, have reduced signal distortion, and have multipath input function.
Preferably, described communication module employing model is the communication chip of TJA1050; Its speed is high, and low electromagnetic has the differential receiver of wide input range, the heat protection, and result of use is better.
Principle of work of the present utility model is as follows:
During use, a plurality of LOAD CELLS are installed on respectively on each bar steel band of elevator, LOAD CELLS obtains the load-carrying of steel band according to the stress intensity on the steel band, and the observed reading that obtains is the simulation weight signal; Analog-to-digital conversion module should be simulated weight signal and be converted digital weight signal to; The CPU module reads the digital weight signal of each passage, through filtering, obtain the numerical information about the elevator total weight after cumulative, and this numerical information is sent to communication module by communications protocol composition data packet, be sent to again the Master Control Center of elevator by communication bus; Master Control Center obtains the load value of elevator reality, according to load value elevator is controlled accordingly.
The utility model is owing to adopting digital communication technology, and antijamming capability is strong, has ensured the real effectiveness of data; Because LOAD CELLS is installed on the steel band, install very convenient in addition; Owing to adopting the multi-channel input, can adapt to different types of elevator simultaneously.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the electrical block diagram of analog-to-digital conversion module.
Fig. 3 is the electrical block diagram of communication module.
The specific embodiment
In order more specifically to describe the utility model, below in conjunction with the drawings and the specific embodiments the technical solution of the utility model is elaborated.
As shown in Figure 1, a kind of detecting device of elevator weight comprises: 5 LOAD CELLS, an analog-to-digital conversion module, a CPU module and communication modules; Wherein:
5 LOAD CELLS are installed on respectively on 5 steel bands of elevator, and it is used for measuring the stress of steel band, thereby produce the simulation weight signal; Because LOAD CELLS is installed on the steel band of elevator, therefore convenient for installation and maintenance; It is minimum to be 2 the tunnel, and present embodiment uses 5 the tunnel, can also be other quantity in actual the use, to adapt to the variety classes elevator; LOAD CELLS is measured the load-carrying of steel band according to the stress on the steel band, observed reading is converted to the simulation weight signal; In the present embodiment, it is the product of BKL50-BK-5 (Beijing westernization instrument science and technology) that LOAD CELLS is selected model.
Analog-to-digital conversion module is used for the simulation weight signal that each LOAD CELLS produces is carried out analogue to digital conversion, produces 5 railway digital weight signals; It all is connected with 5 LOAD CELLS, in the present embodiment, analog-to-digital conversion module adopts analog to digital conversion circuit as shown in Figure 2 to realize, its core circuit has used the modulus conversion chip of model as ADS1241, is characterized in that precision is high, has inner filter circuit, 24 Bit Significances, remove amplifying circuit from, reduced signal distortion, and had multipath input function; Can also select the modulus conversion chip of other models in actual the use.
The CPU module is used for receiving each railway digital weight signal, and each railway digital weight signal is carried out adding up behind the digital filter, obtains the numerical information about the elevator total weight, and this numerical information is formed Packet Generation to communication module by communications protocol; The CPU module links to each other with analog-to-digital conversion module and communication module, and in the present embodiment, it is the micro controller system of STM8S208S that the CPU module adopts model; Communications protocol adopts CAN bus communication agreement, has an interference performance of seeing strong, and wiring is convenient, long transmission distance; Can also use other digital communication agreements in actual the use, such as RS485.
Communication module is connected on the CAN bus, and its data packet about elevator total weight numerical information that is used for the CPU module is calculated is sent to Master Control Center by CAN (controller local area network) bus; In the present embodiment, communication module adopts communication interface circuit as shown in Figure 3 to realize, its core circuit has used the communication chip of model as TJA1050, its speed is high, and low electromagnetic has the differential receiver of wide input range, the heat protection, result of use is better; Can also select the communication chip of other models in actual the use, such as PCA82C251.
Among Fig. 3, the L9 that is connected on the CAN bus is common mode inductance, can suppress the common-mode voltage on the CAN bus, suppresses communication and disturbs; The Z1 that is connected with L9 and Z2 are the TVS pipe, can suppress the transient high voltage on the CAN bus, the protection communication chip.
Present embodiment is installed on a plurality of LOAD CELLS respectively on each bar steel band of elevator in use, and LOAD CELLS is according to the load-carrying of the stress intensity steel band on the steel band, and the observed reading that obtains is the simulation weight signal; Analog-to-digital conversion module should be simulated weight signal and be converted digital weight signal to; The CPU module reads the digital weight signal of each passage, through filtering, obtain the numerical information about the elevator total weight after the addition, and this numerical information is sent to communication module by communications protocol composition data packet, be sent to again the Master Control Center of elevator by the CAN bus; Master Control Center obtains the load value of elevator reality, according to load value elevator is controlled accordingly.
Present embodiment adopts digital communication technology, and antijamming capability is strong, has ensured the real effectiveness of data, and the weight information of accurate reality can be provided to Master Control Center; Because LOAD CELLS is installed in steel band, therefore system is convenient for installation and maintenance simple, use flexibly in addition.
Claims (5)
1. the detecting device of an elevator weight is characterized in that, comprising: a plurality of LOAD CELLS, an analog-to-digital conversion module and a CPU module; Described LOAD CELLS links to each other with analog-to-digital conversion module, and described analog-to-digital conversion module links to each other with the CPU module; Described a plurality of LOAD CELLS is installed on respectively on each bar steel band of elevator.
2. the detecting device of elevator weight according to claim 1, it is characterized in that: described CPU module is connected with communication module.
3. the detecting device of elevator weight according to claim 1 is characterized in that: it is the micro controller system of STM8S208S that described CPU module adopts model.
4. the detecting device of elevator weight according to claim 1 is characterized in that: it is the modulus conversion chip of ADS1241 that described analog-to-digital conversion module adopts model.
5. the detecting device of elevator weight according to claim 2 is characterized in that: it is the communication chip of TJA1050 that described communication module adopts model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220495070 CN202880601U (en) | 2012-09-26 | 2012-09-26 | Detecting device for elevator weight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220495070 CN202880601U (en) | 2012-09-26 | 2012-09-26 | Detecting device for elevator weight |
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| Publication Number | Publication Date |
|---|---|
| CN202880601U true CN202880601U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220495070 Expired - Lifetime CN202880601U (en) | 2012-09-26 | 2012-09-26 | Detecting device for elevator weight |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112357713A (en) * | 2020-11-27 | 2021-02-12 | 杭州电子科技大学 | Multifunctional elevator safety protection system and method |
-
2012
- 2012-09-26 CN CN 201220495070 patent/CN202880601U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112357713A (en) * | 2020-11-27 | 2021-02-12 | 杭州电子科技大学 | Multifunctional elevator safety protection system and method |
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Granted publication date: 20130417 |