CN108423507A - The self-checking unit and its self checking method of the detecting system of car absolute position - Google Patents
The self-checking unit and its self checking method of the detecting system of car absolute position Download PDFInfo
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- CN108423507A CN108423507A CN201810194044.0A CN201810194044A CN108423507A CN 108423507 A CN108423507 A CN 108423507A CN 201810194044 A CN201810194044 A CN 201810194044A CN 108423507 A CN108423507 A CN 108423507A
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- grid ruler
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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
Abstract
The invention discloses a kind of self-checking unit and its self checking method of the detecting system of car absolute position, the self-checking unit, including：Grid ruler, grid ruler are vertically arranged in hoistway, and grid ruler is equipped with the spaced at least two groups mark of length direction along grid ruler, 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 on car, recognizer component includes at least three sensors, sensor is spaced setting and cannot be detected simultaneously by first identifier unit or second identifier unit in same test position in the vertical direction 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 judge that detecting system whether there is 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 whether there is failure for the detecting system of car absolute position automatically.
Description
Technical field
The present invention relates to elevator technology fields, more particularly to a kind of self-checking unit of the detecting system of car absolute position
And its self checking method.
Background technology
In recent years, elevator be proposed successively in the market some pass through it is real in grid ruler of the hoistway suspension with absolute location information
The component of existing elevator sedan absolute position detection, such as magnetic railings ruler, Quick Response Code grid ruler, the steel band grid ruler with trepanning, many elevators
Producer purchases these components to develop elevator safety function, and such as " inspection subtracts the deceleration conditions of stroke buffers ", " limiter of speed is super
Speed detection ", " car 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, can realize high diagnosis coverage rate invariably.
But although traditional self checking method can detect a part of failure, diagnosis coverage rate is high not enough, cannot accomplish
Can system be made to enter safe condition when any one described sensor failure.
Invention content
Based on this, it is necessary to provide a kind of self-checking unit and its self checking method of the detecting system of car absolute position, energy
The mark of enough complete detection grid rulers changes and detection whether there is failure for the detecting system of car absolute position automatically, carries
The safety of high elevator operation.
Its technical solution is as follows：
A kind of self-checking unit of the detecting system of car absolute position, including：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 length direction and second identifier unit of grid ruler；Recognizer component, the recognizer component are fixed
In on car, 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 and cannot be examined simultaneously in same test position in the vertical direction
Measure the first identifier unit or the second identifier unit；And controller, the controller can receive the sensor
The feedback information of transmission, and can judge that detecting system whether there is failure according to the feedback information.
Above-mentioned self-checking unit is applied in the detecting system of car 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 leading 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 occurs to overturn or deform, and then judges that the detecting system whether there is failure；Specifically, when grid ruler occur overturning or
After deformation, cause the floor coding information being arranged on grid ruler that can also change, can lead to lift car leveling as car continues to run with
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 car 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 car
The self-checking unit for the detecting system set, which can detect within the scope of the mark of grid ruler, to be changed, and is detected to grid ruler to high coverage rate,
Detecting system of the automatic detection for car 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 in photoelectric sensor, 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 can first sensor, second sensor and the be set according to the length relation of first identifier unit and second identifier unit
Spacing between three sensors, it is ensured that cannot be detected simultaneously by the first identifier unit or described second in same test position
Identify unit；And above-mentioned implementation is simple and reliable, it is easy to 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 controller energy receiving sensor sent out 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 detecting system；
When detect there are one the sensor the output signal neither the first predeterminated frequency carrier wave again not
When being the second predeterminated frequency carrier wave, then there are failures for the detecting system.And then the frequency carrier for passing through analyte sensors
Difference judge whether the grid ruler occurs to overturn or deform etc., can no matter what kind of failure combination occurs for three sensors
Self-test is out of order, and is ensured 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 differs.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, reliability is high；In addition, common optoelectronic switch can be used as sensor, the processing method of grid ruler is
Stainless steel band trepanning, implementation cost are cheap.
The technical program additionally provides a kind of self checking method, is 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 detecting system；
When detecting the output signal there are one the sensor neither the first predeterminated frequency carrier wave and be not the
When two predeterminated frequency carrier waves, then there are failures for detecting system.
Using above-mentioned self checking method, defect in background technology can be solved, has high diagnosis coverage rate, it can be in high security
It is required that system in used as car positioning device, further improve the verification and measurement ratio of self test failure.
Description of the drawings
Fig. 1 is the structural schematic diagram of the self-checking unit of the detecting system of car absolute position of the present invention；
Fig. 2 is the self-checking unit operation principle schematic diagram of Fig. 1；
Fig. 3 is the testing principle schematic diagram of the first recognition unit of Fig. 2；
Fig. 4 is the testing principle 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 diagrames when being the elevator operation of another embodiment.
Reference sign：
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, receive source, 300, controller, 10, hoistway, 20, car.
Specific implementation mode
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 solving
The present invention is released, protection scope of the present invention is not limited.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be 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 offered as being unique embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
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 Items.
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 detecting system of car absolute position, including：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 on car, 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 test 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 judge that detecting system whether there is failure according to the feedback information.
Above-mentioned self-checking unit is applied in the detecting system of car 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 occurs to overturn or deform, and then judges whether the detecting system deposits
In failure；Specifically, after overturning or deformation occur for grid ruler 100, cause the floor coding information being arranged on grid ruler 100 that can also send out
Changing can lead to lift car leveling mistake as car continues to run with, 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 car 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 detecting system of the car absolute position can detect grid ruler 100
Variation in 110 ranges is identified, high coverage rate grid ruler 100 is detected, detection of the automatic detection for car absolute position
System whether there is failure, improve the safety of elevator operation.
It should be noted that " all sensors be spaced in the vertical direction setting and same test position cannot be same
When detect the first identifier unit or the second identifier unit ", i.e., sensor arrangement when, because meet be detected
When, the detection 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 in photoelectric sensor, 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 can first sensor 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 test position
One mark unit 112 or second identifier unit 114；And above-mentioned implementation is simple and reliable, it is easy to utilize.
In addition, when sensor detects first identifier unit 112, the first presupposed information is sent, when sensor detects
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, controller 300 can receiving sensor send out
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 detecting system；
When detecting output signal there are one sensor neither the first predeterminated frequency carrier wave and be not the second default frequency
When rate carrier wave, then there are failures for detecting system.And then the grid ruler 100 is judged by the difference of the frequency carrier of analyte sensors
Whether generation overturning or deformation etc., no matter the combination of what kind of failure occurs for three sensors, can self-test be out of order, ensure 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 differs.And then can to reduce between sensor altogether because of the influence of timeliness, the setpoint frequency of a such as sensor is
The setpoint frequency of 10kHz, 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
Know unit 114, first identifier unit 112 is 1 with the length ratio of second identifier unit 114 vertically: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
Sensor 230 and the vertical distance of second sensor 220 are 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 112 corresponding through-hole of first identifier unit 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, and electric signal is detected 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 with 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, to which 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
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 be seen 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 the electric signal output with frequency with high level, then from Fig. 5, can be found from figure 1.~6. this 6 not
The region repeated, 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 112 corresponding through-hole of the first recognition unit on grid ruler 100, biography
Sensor is just to the controller output frequency electric signal consistent with 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 114 corresponding closed pore of the second recognition unit on grid ruler 100, sensor
Just low level, such as Fig. 4 are exported to controller.Controller 300 can be by detecting the frequency of the electric signal with frequency
No is setpoint frequency, i.e. 10kHz, as crossed, to detect electric signal not be low level, 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 220 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 no matter 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 senses
The state of first sensor 210 and second sensor 220 is inevitable different when 240 transition status of device.
When elevator constant velocity runs, 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 to a left side by right, 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 is commented and indicates that sensor detects the second recognition unit, i.e.,
Light beam with frequency is blocked by the closed pore on grid ruler.Indicate the electric signal output with frequency 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, low level is indicated 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 that the sensor whether there is failure.In this regard, can be by judging whether the output state of four sensors is consistent, aforementioned implementation
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 to judge that the sensor whether there is failure by detection.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 is positioned 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 is run, and only need to be moved 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 the self-checking unit for applying above-mentioned self checking method, no matter what kind of event occurs for three sensors
Barrier combines, or controller 300 can detect failure or detect failure after elevator runs minimum distance immediately, 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, can effectively reduce common cause failure in this way to random hardware
The influence of crash rate.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, 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, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, 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 the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (9)
1. a kind of self-checking unit of the detecting system of car absolute position, which is characterized in that including：
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 identify, and the mark includes the spaced first identifier unit of length direction and second identifier along the grid ruler
Unit；
Recognizer component, the recognizer component are fixedly arranged on car, 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 cannot be detected simultaneously by the first identifier unit or the second identifier unit in same test 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 detecting 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
Preset ratio setting is pressed between the length of mark 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 controller energy receiving sensor sent out 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 detecting system；
When detecting the output signal there are one the sensor neither the first predeterminated frequency carrier wave and be not institute
When stating the second predeterminated frequency carrier wave, then there are failures for the detecting 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 differs.
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 it is 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 detecting system；
When detecting the output signal there are one the sensor neither the first predeterminated frequency carrier wave and be not second pre-
If when frequency carrier, then there are failures for detecting system.
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