CN108423507B - The self-checking unit and its self checking method of the detection system of carriage absolute position - Google Patents
The self-checking unit and its self checking method of the detection system of carriage absolute position Download PDFInfo
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- CN108423507B CN108423507B CN201810194044.0A CN201810194044A CN108423507B CN 108423507 B CN108423507 B CN 108423507B CN 201810194044 A CN201810194044 A CN 201810194044A CN 108423507 B CN108423507 B CN 108423507B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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Abstract
The invention discloses the self-checking units and its self checking method of a kind of detection system of carriage absolute position, the self-checking unit includes: grid ruler, grid ruler is vertically arranged in hoistway, grid ruler is equipped with along the spaced at least two groups mark of grid ruler length direction, and mark includes the spaced first identifier unit of length direction and second identifier unit along grid ruler；Recognizer component, recognizer component is fixedly arranged in carriage, recognizer component includes at least three sensors, sensor is spaced setting in the vertical direction and cannot be detected simultaneously by first identifier unit or second identifier unit in same detection position for detecting first identifier unit and second identifier unit, all the sensors；And controller, controller can receive the feedback information of sensor transmission, and can be judged detection system with the presence or absence of failure according to the feedback information.The self-checking unit and its self checking method, the mark for capableing of complete detection grid ruler changes and detection is used for the detection system of carriage absolute position with the presence or absence of failure automatically.
Description
Technical field
The present invention relates to elevator technology fields, more particularly to a kind of self-checking unit of the detection system of carriage absolute position
And its self checking method.
Background technique
In recent years, elevator is proposed some by real in grid ruler of the hoistway suspension with absolute location information successively in the market
The component of existing elevator sedan absolute position detection, such as magnetic railings ruler, two dimensional code grid ruler, the steel band grid ruler with aperture, many elevators
Producer purchases these components to develop elevator safety function, and such as " deceleration conditions that inspection subtracts stroke buffers ", " limiter of speed is super
Speed detection ", " carriage accidental movement detection etc. ".The realization of security function must be based on the higher electronics peace of safety integrity level
Total system, these systems require have complete self-detection mechanism invariably, are able to achieve high diagnosis coverage rate.
But although traditional self checking method can detect a part of failure, diagnosis coverage rate is high not enough, cannot accomplish
Any one described sensor failure Shi Junneng makes system enter safe condition.
Summary of the invention
Based on this, it is necessary to provide the self-checking unit and its self checking method of a kind of detection system of carriage absolute position, energy
The detection system that the mark of enough complete detection grid rulers changes and detection is used for carriage absolute position automatically whether there is failure, mention
The safety of high elevator operation.
Its technical solution is as follows:
A kind of self-checking unit of the detection system of carriage absolute position, comprising: grid ruler, the grid ruler are vertically arranged in hoistway
Interior, the grid ruler is equipped with the spaced at least two groups mark of length direction along the grid ruler, and the mark includes along described
The spaced first identifier unit of the length direction of grid ruler and second identifier unit；Recognizer component, the recognizer component are fixed
In in carriage, the recognizer component includes at least three sensors, the sensor for detect the first identifier unit and
The second identifier unit, all sensors are spaced setting in the vertical direction and cannot examine simultaneously in same detection position
Measure the first identifier unit or the second identifier unit；And controller, the controller can receive the sensor
The feedback information of transmission, and detection system can be judged with the presence or absence of failure according to the feedback information.
Above-mentioned self-checking unit is applied in the detection system of carriage absolute position, exhausted using lift car is carried out on grid ruler
To in the detection process of position, by the way that first identifier unit and second identifier unit are arranged on the length direction of grid ruler, and lead to
Recognizer component is crossed to detect the first identifier unit and second identifier unit, and sends corresponding detection signal and is given to controller,
The feedback information that controller is sent according to sensor handles analysis feedback information according to preset decision logic, can determine whether this
Whether grid ruler is flipped or deforms, and then judges the detection system with the presence or absence of failure；Specifically, be flipped when grid ruler or
After deformation, cause the floor encoded information being arranged on grid ruler that can also change, will lead to lift car leveling as carriage continues to run
There is unnecessary elevator interruption of service in mistake；And can then find the overturning or deformation of grid ruler in time using above-mentioned self-checking unit,
The carriage is controlled in time and enters safe operation state, while maintenance staff can be notified to carry out maintenance to elevator.The absolute position of the carriage
The self-checking unit for the detection system set, which is able to detect within the scope of the mark of grid ruler, to be changed, and is detected to grid ruler to high coverage rate,
Detection system of the automatic detection for carriage absolute position whether there is failure, improve the safety of elevator operation.
Technical solution is illustrated further below:
In one of the embodiments, between the length of the first identifier unit and the length of the second identifier unit
By preset ratio setting.And then phase can be designed according to the type and grid ruler feature of first identifier unit and second identifier unit
The length answered, to ensure the accuracy of sensor detection identification.
The length of the first identifier unit and the length of the second identifier unit are in one of the embodiments,
L.It convenient for being applied to photoelectric sensor, in magnetic displacement sensor, while being also easy to be set on grid ruler, reduces manufacturing cost.
The recognizer component includes first sensor, second sensor and 3rd sensor in one of the embodiments,
The first sensor close to the grid ruler upper end be arranged, the second sensor be set to the first sensor with it is described
Between 3rd sensor, the 3rd sensor is arranged close to the lower end of the grid ruler, the first sensor and described second
The distance between sensor is 1/4 × 2L, and the distance between the second sensor and the 3rd sensor are 5/8 × 2L.
And then first sensor, second sensor and the can be set according to the length relation of first identifier unit and second identifier unit
Spacing between three sensors, it is ensured that the first identifier unit or described second cannot be detected simultaneously by same detection position
Identify unit；And above-mentioned implementation is simple and reliable, it is easy to promote and utilize.
In one of the embodiments, when the sensor detects the first identifier unit, it is default to send first
Information sends the second presupposed information when the sensor detects the second identifier unit；First presupposed information is
Output signal with the first predeterminated frequency carrier wave, second presupposed information are the output letter with the second predeterminated frequency carrier wave
Number, the output signal of the sending of the controller energy receiving sensor and the carrier frequency for obtaining the output signal；
When the output signal for detecting all sensors is the first predeterminated frequency carrier wave or described second
When predeterminated frequency carrier wave, then there are failures for the detection system；
When the output signal for detecting the sensor neither the first predeterminated frequency carrier wave again not
When being the second predeterminated frequency carrier wave, then there are failures for the detection system.And then the frequency carrier for passing through analyte sensors
Difference judge whether the grid ruler is flipped or deforms, can regardless of what kind of failure combination occurs for three sensors
Self-test is out of order, and is guaranteed system safety, is prevented dangerous generation.
The first predeterminated frequency carrier wave is setpoint frequency in one of the embodiments, and at least there are two the sensings
The frequency for the setpoint frequency that device is sent is not identical.And then can to reduce between sensor altogether because of the influence of timeliness, such as
The setpoint frequency of one sensor is 10kHz, and the setpoint frequency of another sensor is 13kHz, process of the controller in analysis
In while can cause the setpoint frequency of sensor to avoid certain common cause distortion and generate malfunction.
The output signal of the second predeterminated frequency carrier wave is the DC voltage of default amplitude in one of the embodiments,
Signal.
First identifier unit is through-hole in one of the embodiments, and second identifier unit is closed pore, and the sensor is
Photoelectric sensor.And then grid ruler information can be read using non-contact detection technology, make to be not present between sensor and grid ruler
Friction, thus the service life is high, high reliablity；In addition, common optoelectronic switch can be used as sensor, the processing method of grid ruler is
Stainless steel band aperture, the implementation cost is low.
The technical program additionally provides a kind of self checking method, applied to above-mentioned self-checking unit, includes the following steps:
It receives the output signal of all the sensors and detects the frequency of the frequency carrier of the output signal；
When the output signal for detecting all sensors is the first predeterminated frequency carrier wave or the second predeterminated frequency
When carrier wave, then there are failures for the detection system；
When the output signal for detecting the sensor neither the first predeterminated frequency carrier wave is not again the
When two predeterminated frequency carrier waves, then there are failures for detection system.
Using above-mentioned self checking method, it is able to solve defect in background technique, has high diagnosis coverage rate, it can be in high security
It is required that system in use as carriage positioning device, further improve the verification and measurement ratio of self test failure.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the self-checking unit of the detection system of carriage absolute position of the present invention；
Fig. 2 is the self-checking unit operation principle schematic diagram of Fig. 1；
Fig. 3 is the detection schematic diagram of the first recognition unit of Fig. 2；
Fig. 4 is the detection schematic diagram of the second recognition unit of Fig. 2；
Fig. 5 is that each sensor output frequency carrier wave exports schematic diagram when elevator is run；
Fig. 6 is self-checking unit operation principle schematic diagram in another embodiment；
Fig. 7 each sensor output frequency carrier wave output schematic diagram when being the elevator operation of another embodiment.
Description of symbols:
100, grid ruler, 110, mark, 112, first identifier unit, 114, second identifier unit, 200, recognizer component, 210,
First sensor, 220, second sensor, 230,3rd sensor, the 240, the 4th sensor, 202, band frequency carrier output letter
Number, 204, permanent Level output signal, 206, light emitting source, 208, reception source, 300, controller, 10, hoistway, 20, carriage.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, below in conjunction with attached drawing and specific embodiment party
Formula, the present invention is further described in detail.It should be understood that the specific embodiments described herein are only to solve
The present invention is released, and the scope of protection of the present invention is not limited.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
Heretofore described " first ", " second " do not represent specific quantity and sequence, are only used for the differentiation of title.
As shown in Figures 1 and 2, the present invention provides a kind of self-checking unit of the detection system of carriage absolute position, comprising: grid
Ruler 100, grid ruler 100 are vertically arranged in hoistway, and grid ruler 100 is equipped with the length direction spaced at least two along grid ruler 100
Group mark 110, mark 110 include the spaced first identifier unit 112 of length direction and second identifier list along grid ruler 100
Member 114；Recognizer component 200, recognizer component 200 are fixedly arranged in carriage, and recognizer component 200 includes at least three sensors, sensing
Device for detecting first identifier unit 112 and second identifier unit 114, all the sensors be spaced in the vertical direction setting and
Same detection position cannot be detected simultaneously by first identifier unit 112 or second identifier unit 114；And controller 300, controller
300 can receive the feedback information of sensor transmission, and can be judged detection system with the presence or absence of failure according to the feedback information.
Above-mentioned self-checking unit is applied in the detection system of carriage absolute position, using carrying out elevator car on grid ruler 100
In the detection process of compartment absolute position, by the way that first identifier unit 112 and second identifier are arranged on the length direction of grid ruler 100
Unit 114, and the first identifier unit 112 and second identifier unit 114 are detected by recognizer component 200, and send corresponding
Detection signal be given to controller 300, the feedback information that controller 300 is sent according to sensor, according to preset decision logic
Analysis feedback information is handled, can determine whether the grid ruler 100 is flipped or deforms, and then judge whether the detection system deposits
In failure；Specifically, causing the floor encoded information being arranged on grid ruler 100 that can also send out after grid ruler 100 is flipped or deforms
Changing will lead to lift car leveling mistake as carriage continues to run, unnecessary elevator interruption of service occur；And utilization is above-mentioned certainly
Checking device can then find the overturning or deformation of grid ruler 100 in time, control the carriage in time and enter safe operation state, while can lead to
Know that maintenance staff carry out maintenance to elevator.The self-checking unit of the detection system of the carriage absolute position is able to detect grid ruler 100
Variation in 110 ranges is identified, high coverage rate grid ruler 100 is detected, automatic detection is used for the detection of carriage absolute position
System whether there is failure, improve the safety of elevator operation.
It should be noted that " all sensors are spaced setting in the vertical direction and cannot be same in same detection position
When detect the first identifier unit or the second identifier unit ", i.e., sensor arrangement when, because meet detected
When, the test object of all the sensors cannot be the same.
Further, in preset ratio between the length of first identifier unit 112 and the length of second identifier unit 114
Setting.And then it can be designed according to the type and 100 feature of grid ruler of first identifier unit 112 and second identifier unit 114 corresponding
Length, with ensure sensor detection identification accuracy.Further, the length of first identifier unit 112 and the second mark
The length for knowing unit 114 is L.Convenient for being applied to photoelectric sensor, in magnetic displacement sensor, while being also easy to be set to grid ruler
On 100, manufacturing cost is reduced.In conjunction with above-mentioned length limitation, recognizer component 200 includes first sensor 210, second sensor
220 and 3rd sensor 230, first sensor 210 is arranged close to the upper end of grid ruler 100, and second sensor 220 is set to first
Between sensor 210 and 3rd sensor 230,3rd sensor 230 is arranged close to the lower end of grid ruler 100, first sensor 210
The distance between second sensor 220 is 1/4 × 2L, and the distance between second sensor 220 and 3rd sensor 230 are 5/
8×2L.And then first sensor can be set according to the length relation of first identifier unit 112 and second identifier unit 114
210, the spacing between second sensor 220 and 3rd sensor 230, it is ensured that cannot be detected simultaneously by same detection position
One mark unit 112 or second identifier unit 114；And above-mentioned implementation is simple and reliable, it is easy to promote and utilize.
In addition, the first presupposed information is sent, when sensor detects when sensor detects first identifier unit 112
When second identifier unit 114, the second presupposed information is sent；First presupposed information is the output letter with the first predeterminated frequency carrier wave
Number, the second presupposed information is the output signal with the second predeterminated frequency carrier wave, the sending of 300 energy receiving sensor of controller
Output signal and the carrier frequency for obtaining the output signal；
When the output signal for detecting all the sensors is the first predeterminated frequency carrier wave or the second predeterminated frequency carrier wave, then
There are failures for detection system；
When the output signal for detecting a sensor neither the first predeterminated frequency carrier wave is not the second default frequency again
When rate carrier wave, then there are failures for detection system.And then the grid ruler 100 is judged by the difference of the frequency carrier of analyte sensors
Whether be flipped or deform, regardless of the combination of what kind of failure occurs for three sensors, can self-test be out of order, guarantee system
Safety prevents dangerous generation.
It of courses, the first predeterminated frequency carrier wave is setpoint frequency, the frequency of the setpoint frequency at least sent there are two sensor
Rate is not identical.And then can to reduce between sensor altogether because of the influence of timeliness, the setpoint frequency of a such as sensor is
10kHz, the setpoint frequency of another sensor are 13kHz, and controller 300 can be common former to avoid certain during analysis
Thus cause distortion while the setpoint frequency of sensor and generates malfunction.
In this embodiment, as shown in Fig. 2, indicating first identifier unit 112 with through-hole, the second mark is indicated with closed pore
Unit 114, first identifier unit 112 and the length ratio of second identifier unit 114 vertically are known for 1:1, and L1=L2=
12mm.Sensor group includes three sensors, and first sensor 210 and the vertical distance of second sensor 220 are 6mm, third
The vertical distance of sensor 230 and second sensor 220 is 15mm.Such sensor arrangement can guarantee three sensors
It will not be detected simultaneously by first identifier unit 112 or second identifier unit 114, because regardless of ascending for elevator or downlink, first
The state of second sensor 220 and 3rd sensor 230 is inevitable different when 210 transition status of sensor, equally when third senses
The state of first sensor 210 and second sensor 220 is inevitable different when 230 transition status of device.
Specifically, sensor is optoelectronic switch, light beam is with the frequency scintillation of frequency carrier.As shown in figure 3, when photoelectricity is opened
The light beam of pass is by the corresponding through-hole of first identifier unit 112 on grid ruler 100, and sensor is just to the output of controller 300 first
Presupposed information, first presupposed information are the output signal with the first predeterminated frequency carrier wave, in this embodiment, frequency
Carrier wave is set as 10kHz.As shown in figure 4, the light beam when optoelectronic switch is corresponding by the second identifier unit 114 on grid ruler 100
Closed pore blocks, and sensor just exports the second presupposed information to controller 300, which is with the second predeterminated frequency
The output signal of carrier wave, in this embodiment, frequency carrier are set as the permanent level of frequency carrier.Controller 300 can lead to
Whether the frequency for crossing electric signal of the detection detection with frequency is setpoint frequency, i.e. 10kHz, detects electric signal not and be permanent electricity as crossed
It is flat, nor 10kHz, then can self-test be out of order.
Due to more or less existing in interference signal, such as the present embodiment in actual field, the propagation medium of optoelectronic switch
For light, and it is easy to be interfered by the light of sunlight or other luminaires.In this case, so that it may by each sensor
Frequency carrier is set as different value, with this come avoid because interference generate common cause failure.Such as certain noise amplitudes is sufficiently large, and frequency
Rate is exactly equal to the frequency carrier of first sensor 210, then its inevitable frequency with second sensor 220 and 3rd sensor 230
Rate carrier wave is unequal, and such second sensor 220 and 3rd sensor 230 can detect the frequency carrier institute set with itself
Different signal frequency, so that self-test is out of order.
As shown in Figure 5 when elevator constant velocity runs, three sensors (first sensor 210, second sensor 220 and the
Three sensors 230) output phase relationship, by from left to right seeing, when elevator constant velocity's downlink, pressed when elevator constant velocity's uplink
Right to see to a left side, high level indicates that sensor detects that first identifier unit 112, the i.e. light beam with frequency have passed through grid ruler 100
On through-hole, and low spot comment indicate sensor detect second identifier unit 114, i.e., the light beam with frequency is by grid ruler 100
Closed pore blocks.Indicate that the electric signal with frequency exports with high level, then from Fig. 5, can be found from figure 1.~6. this 6 not
Duplicate region, each sector respective sensor output state.Further, as shown in table 1 below, wherein high level is indicated with 1, with 0
Indicate low level.Obviously, in this 6 regions there is no complete 1 and full 0 combination, as long as thus controller 300 detect all biographies
When the output state of sensor is consistent, so that it may be regarded as failure.
Reading of 1 elevator of table when running under each state of each sensor
| Serial number | 1 | 2 | 3 | 4 | 5 | 6 |
| First sensor | 1 | 1 | 1 | 0 | 0 | 0 |
| Second sensor | 0 | 0 | 1 | 1 | 1 | 0 |
| 3rd sensor | 1 | 0 | 0 | 0 | 1 | 1 |
In another embodiment, as shown in FIG. 6 and 7, the first recognition unit 112 is still indicated with through-hole, with closed pore
Indicate that the second recognition unit 114, the length ratio of the first recognition unit 112 and the second recognition unit 114 vertically are 1:1, and
L1=L2=12mm.Recognizer component 200 includes four sensors, and the form of sensor is optoelectronic switch, and light beam is with the frequency
The frequency scintillation of rate carrier wave, when the light beam of optoelectronic switch passes through the corresponding through-hole of the first recognition unit 112 on grid ruler 100, biography
Sensor is just to controller output frequency and the consistent electric signal of beam scintillation frequency, such as Fig. 3, in the present embodiment, flicker frequency
It is set as 10kHz.When the light beam of optoelectronic switch is blocked by the corresponding closed pore of the second recognition unit 114 on grid ruler 100, sensor
Just low level, such as Fig. 4 are exported to controller.Controller 300 can be by the frequency that detection detects the electric signal with frequency
No is setpoint frequency, i.e. 10kHz detects that electric signal is not low level if crossed, nor 10kHz, then can self-test be out of order.Tool
Body, the vertical distance of first sensor 210 and second sensor 220 is 6mm, 3rd sensor 230 and second sensor 220
Vertical distance be 15mm, the vertical distance of the 4th sensor 240 and 3rd sensor 230 is 6mm, each sensor and grid ruler
Arrangement signal is as shown in Figure 7.Sensor arrangement can guarantee that four sensors will not be detected simultaneously by the first recognition unit 112 in this way
Or second recognition unit 114, because regardless of ascending for elevator or downlink, second sensor when 210 transition status of first sensor
220,3rd sensor 230 and the state of the 4th sensor 240 are inevitable different, equally when 3rd sensor 230 and the 4th sensing
The state of first sensor 210 and second sensor 220 is inevitable different when 240 transition status of device.
When elevator constant velocity's operation, the output phase relationships of four sensors as shown in fig. 7, when elevator constant velocity's uplink,
It by from left to right seeing, when elevator constant velocity's downlink, is seen by right to a left side, high level indicates that sensor detects the first recognition unit
112, i.e., the light beam with frequency has passed through the through-hole on grid ruler, and low spot comments expression sensor to detect the second recognition unit, i.e.,
Light beam with frequency is blocked by the closed pore on grid ruler.Indicate that the electric signal with frequency exports with high level, then it, can be with from Fig. 7
1.~8. this 8 unduplicated regions, each sector respective sensor output state are found from figure.
As shown in Figure 7, wherein indicate high level with 1, indicate low level with 0.Obviously, there is no complete 1 in this 8 regions
With complete, 0 combination, as long as thus controller 300 when detecting that the output state of all the sensors is consistent, so that it may be regarded as therefore
Barrier.
Reading of 2 elevator of table when running under each state of each sensor
| Serial number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| First sensor | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Second sensor | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 |
| 3rd sensor | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
| 4th sensor | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 |
In addition, due to there is 4 sensors, thus diagnostic measures can be further increased, as first sensor 210 and third pass
Will not occur all ones or all zeroes, therefore available previous embodiment (recognizer component 200 that three sensors are constituted) between sensor 230 simultaneously
In method self-test made to these three sensors, and second sensor 220 and the 4th sensor 240 be equally not in complete 1 or
The combination of full 0, thus previous embodiment (recognizer component 200 that three sensors are constituted) equally can be used to these three sensors
In method make self-test.Further, self-test can be made to the level change rule of each sensor in sensor group, such as this implementation
In example, whether the level combinations variation that can detect 4 sensors changes according to the rule sequence or backward of table 2.Work as sensor light
When beam is blocked by closed pore, the electric signal with frequency can not be exported, thus controller can not be received by detection the frequency of signal come
Judge the sensor with the presence or absence of failure.In this regard, can be by whether consistent, the aforementioned implementation that judges the output state of four sensors
Example (three sensors constitute recognizer component 200) self checking method and level combinations changing rule detect failure.
In this embodiment, when sensor light beam is blocked by closed pore, the electric signal with frequency can not be exported, thus
Controller 300 can not receive the frequency of signal by detection to judge the sensor with the presence or absence of failure.In this regard, judgement can be passed through
Whether the output states of three sensors unanimously detects failure.
Further, in this specific embodiment, the output after the sensor failure is two classes, and the first kind is permanent level, right
For controller 300, permanent level is consistent with low level state；Second class is the non-permanent level electrical signal of non-setpoint frequency.
In turn, in the self checking method of this specific embodiment, when first kind failure occurs for any one sensor, if separately
Outer two sensor light beams are blocked by second identifier unit 114 simultaneously, then controller 300 detects the state one of three sensors
It causes, detects failure；If other two sensor one be located at first identifier unit 112 and another is located at second identifier unit
114, then controller 300 cannot detect failure at this time, still, once elevator is run, it is (specific real at this need to only move minimum distance
Apply in example, maximum moving distance 15mm), other two sensor just will appear consistent output state, at this time controller 300
Failure can be detected.
In turn, in the self checking method of this specific embodiment, when the second class failure occurs for any one sensor, control
The signal frequency that device 300 can detect its output immediately is not the 10kHz of setpoint frequency, thus can detect failure immediately.
In turn, in the self checking method of this specific embodiment, when first kind failure occurs for any two sensor, if not
The sensor to break down detects first identifier unit 112, then controller 300 cannot detect failure at this time, still, once
Elevator operation, only need to move minimum distance (in the present embodiment, maximum 12mm), will be blocked, reach by second identifier unit 114
Consistent to three sensor-output status, controller 300 can detect failure at this time.
In turn, in the self checking method of this specific embodiment, when the second class failure occurs for any two sensor, control
The signal frequency that device 300 can detect its output immediately is not the 10kHz of setpoint frequency, thus can detect failure immediately.
In conclusion for the self-checking unit for applying above-mentioned self checking method, regardless of what kind of event occurs for three sensors
Barrier combination, controller 300 otherwise can detect immediately failure or elevator run minimum distance after detect failure, can be
System occurs to detect failure before hypervelocity etc. is dangerous, carries out fault handling operation, prevents dangerous generation.
In addition, for setpoint frequency, each sensor can set different setpoint frequencies, as first sensor 210 is
2kHz, second sensor 220 are 3kHz, and 3rd sensor 230 is 4kHz, and common cause failure can be effectively reduced in this way to random hardware
The influence of crash rate.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. a kind of self-checking unit of the detection system of carriage absolute position characterized by comprising
Grid ruler, the grid ruler are vertically arranged in hoistway, and the grid ruler is spaced equipped with the length direction along the grid ruler
At least two groups mark, the mark include the spaced first identifier unit of length direction and second identifier along the grid ruler
Unit；
Recognizer component, the recognizer component are fixedly arranged in carriage, and the recognizer component includes at least three sensors, the sensing
For detecting the first identifier unit and the second identifier unit, all sensors are spaced in the vertical direction to be set device
It sets and the first identifier unit or the second identifier unit cannot be detected simultaneously by same detection position；And
Controller, the controller can receive the feedback information that the sensor is sent, and can be sentenced according to the feedback information
Disconnected detection system whether there is failure.
2. self-checking unit according to claim 1, which is characterized in that the length of the first identifier unit and described second
It identifies and presses preset ratio setting between the length of unit.
3. self-checking unit according to claim 2, which is characterized in that the length of the first identifier unit and described second
The length for identifying unit is L.
4. self-checking unit according to claim 3, which is characterized in that the recognizer component includes first sensor, second
Sensor and 3rd sensor, the first sensor are arranged close to the upper end of the grid ruler, and the second sensor is set to
Between the first sensor and the 3rd sensor, the 3rd sensor is arranged close to the lower end of the grid ruler, described
The distance between first sensor and the second sensor are 1/4 × 2L, the second sensor and the 3rd sensor
The distance between be 5/8 × 2L.
5. self-checking unit according to any one of claims 1 to 4, which is characterized in that described in being detected when the sensor
When first identifier unit, the first presupposed information is sent, when the sensor detects the second identifier unit, sends second
Presupposed information；First presupposed information is the output signal with the first predeterminated frequency carrier wave, and second presupposed information is
Output signal with the second predeterminated frequency carrier wave, the output signal of the sending of the controller energy receiving sensor simultaneously obtain
The carrier frequency of the output signal；
When the output signal for detecting all sensors is that the first predeterminated frequency carrier wave or described second are preset
When frequency carrier, then there are failures for the detection system；
When the output signal for detecting the sensor neither the first predeterminated frequency carrier wave is not again institute
When stating the second predeterminated frequency carrier wave, then there are failures for the detection system.
6. self-checking unit according to claim 5, which is characterized in that the first predeterminated frequency carrier wave is setpoint frequency,
The frequency of the setpoint frequency at least sent there are two the sensor is not identical.
7. self-checking unit according to claim 5, which is characterized in that the output signal of the second predeterminated frequency carrier wave is
The d. c. voltage signal of default amplitude.
8. self-checking unit according to claim 5, which is characterized in that first identifier unit is through-hole, second identifier unit
For closed pore, the sensor is photoelectric sensor.
9. a kind of self checking method, which is characterized in that applied to the self-checking unit as described in any one of claim 5 to 8, including
Following steps:
It receives the output signal of all the sensors and detects the frequency of the frequency carrier of the output signal；
When the output signal for detecting all sensors is the first predeterminated frequency carrier wave or the second predeterminated frequency carrier wave
When, then there are failures for the detection system；
When the output signal for detecting the sensor neither the first predeterminated frequency carrier wave is not second pre- again
If when frequency carrier, then there are failures for detection system.
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| CN109084716B (en) * | 2018-09-14 | 2024-06-25 | 京信通信技术(广州)有限公司 | Antenna, rotating member and detecting device for detecting position information of rotating member |
| CN110271930A (en) * | 2019-06-25 | 2019-09-24 | 快意电梯股份有限公司 | Elevator car slipping rescues automatic detection device and detection method |
| CN112179275B (en) * | 2019-07-01 | 2022-06-03 | 欧姆龙(上海)有限公司 | Grating scale sensor and detection method |
| CN112079217A (en) * | 2020-10-09 | 2020-12-15 | 上海昶屹机电科技有限公司 | Elevator car load real-time detection system and method |
| CN112938670B (en) * | 2021-02-26 | 2023-03-10 | 日立电梯(上海)有限公司 | Skip-floor elevator terminal station protection device and debugging method thereof |
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