CN219652466U - Escalator safety clearance detection device - Google Patents
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- CN219652466U CN219652466U CN202320525974.6U CN202320525974U CN219652466U CN 219652466 U CN219652466 U CN 219652466U CN 202320525974 U CN202320525974 U CN 202320525974U CN 219652466 U CN219652466 U CN 219652466U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model relates to an escalator safety clearance detection device, which comprises a measurement host module, a clearance measurement module connected with the measurement host module, a displacement measurement marking module connected with the measurement host module and an operation terminal module connected with the measurement host module; the measuring host module measures the gap size at one side of the escalator and transmits data to the operation terminal module; the gap measuring module measures the gap size at the other side of the escalator and transmits data to the measuring host module; the displacement measurement marking module is used for measuring the running speed and displacement of the escalator and transmitting data to the measurement host module; the operation terminal module receives and stores the data and draws a time curve of the measured gap and the speed displacement. The utility model adopts a non-contact gap measurement mode, and can perform high-precision non-contact measurement on the gap between the step and the apron plate without affecting the operation of the escalator, and can quickly, accurately and intuitively obtain a measurement result by matching with a corresponding method.
Description
Technical Field
The utility model relates to the field of escalator safety detection, in particular to an escalator safety clearance detection device.
Background
The clearance requirements between the steps (or steps) and the apron board of the TSG T7005-2012 elevator supervision and periodic inspection rules-escalator and travelator are as follows: the skirt guard of an escalator or moving walkway should be provided on both sides of the steps, tread or tape, the horizontal gap on either side should be no more than 4mm, and the sum of the gaps at the symmetrical positions on both sides should be no more than 7mm.
The current IMD1 of foreign PMT company uses a contact measurement mode to measure the performance index between the step (or pedal) and the apron, and the gap between the step (or pedal) and the apron is calculated mainly through measurement of two quantities. The first number is the loading gap (Lg). This is the distance between the step edge and the apron, while the step is "pushed away" from the apron using a force of about 110N (25 lbs.). The second measurement is the coefficient of sliding friction (μ) between the skirt guard and a standard polycarbonate sample (providing PMT). The index is defined as:
step/apron performance index = ey/(ey + 1),
wherein: y= -3.77+2.37 (μ) +0.37 (Lg) e= 2.7183 (Lg, unit: mm)
The measurement mode is divided into static (i.e. elevator stop state) measurement and dynamic (i.e. elevator running state) measurement, and the static measurement cannot fully embody the change state of the clearance. The measurement shows that the gap has a larger difference between the value in the running state and the value in the static state, which indicates that the steps are not relatively static in the horizontal direction during movement, but have swinging.
The dynamic measurement mainly adopts contact measurement, and adopts a linear displacement sensor to measure the clearance, but the linear displacement sensor is suitable for axial measurement, and when the linear displacement sensor is used for measuring the clearance of the skirt guard, the linear displacement sensor is influenced by radial force (friction force of a contact wheel), so that the measurement precision and the service life can be seriously reduced.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the escalator safety clearance detection device which can overcome the defects of contact type measurement and detection, and can accurately position the exceeding position by synchronously carrying out displacement measurement by enabling the precision of the measurement and detection clearance to reach 0.01mm through the application of a high-precision data acquisition technology.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the escalator safety clearance detection device comprises a measurement host module, a clearance measurement module connected with the input end of the measurement host module, a displacement measurement marking module connected with the measurement host module in a signal manner and an operation terminal module connected with the measurement host module in a signal manner; the measuring host module is used for measuring the gap size at one side of the escalator and transmitting data to the operation terminal module; the gap measuring module is used for measuring the gap size at the other side of the escalator and transmitting data to the measuring host module; the displacement measurement marking module is used for measuring the running speed and displacement of the escalator and transmitting data to the measurement host module; the operation terminal module is used for receiving and storing data and drawing a time curve of the measured gap and the measured speed displacement.
Further, the measurement host module comprises a first gap measurement sensor unit, a battery and a power line, and a first edge alignment plate is arranged on one side of the measurement host module, and further comprises a first driving circuit in the first gap measurement sensor unit.
Further, the gap measurement module comprises a second gap measurement sensor unit, a battery, a charging hole, a charging indicator lamp, a data line port connected with the measurement host module, a second edge alignment plate positioned on one side of the gap measurement module, and a second driving circuit in the second gap measurement sensor unit.
Further, the displacement measurement marking module is used for collecting the running speed of the escalator and marking the exceeding position of the apron plate gap; the locking device comprises a step locking structure, wherein the step locking structure consists of a locking pull ring and a locking plugboard, the locking pull ring is positioned on the outer edge of a displacement measurement marking module, the locking plugboard is internally provided with the displacement measurement marking module, and the locking plugboard can be driven to horizontally move by pulling the locking pull ring; the automatic detection device comprises an encoder elastic device, an encoder wheel, an electronic propulsion device, a mark driving circuit, an exceeding mark unit and a locking knob, wherein one end of the encoder elastic device is internally provided with a displacement measurement mark module, the other end of the encoder elastic device is connected with the encoder wheel, one end of the locking knob is internally provided with the displacement measurement mark module and is connected with the encoder elastic device, and the other end of the locking knob is arranged on the outer edge of the displacement measurement mark module; the encoder wheel is positioned on the outer edge of the displacement measurement marking module and is positioned on the opposite side of the step locking structure; the electronic propulsion device is internally provided with a displacement measurement marking module and is used for driving an exceeding marking unit, one end of the exceeding marking unit is internally provided with the displacement measurement marking module, the marking end of the other end of the exceeding marking unit is arranged outside the displacement measurement marking module, and the lower edge of the side opposite to the step locking structure of the displacement measurement marking module is also provided with a plugboard.
Further, the circuit is a first driving circuit in the first gap measurement sensor unit, and is composed of a DAC chip U2, an operational amplifier U1, a high-power field effect transistor Q1, a sampling resistor Rs, current limiting resistors R2 and R4, filter capacitors C2 and C3, a feedback resistor R1 and a switching field effect transistor Q2.
Further, the circuit is a second driving circuit in the second gap measurement sensor unit, and is composed of a DAC chip U2, an operational amplifier U1, a high-power field effect transistor Q1, a sampling resistor Rs, current limiting resistors R2 and R4, filter capacitors C2 and C3, a feedback resistor R1 and a switching field effect transistor Q2.
Further, the mark driving circuit is isolated from the measuring host module through a chip U3, and is connected with the signal of the measuring host module through the current limitation of a current limiting resistor R4; the U3 output directly drives the Darlington composite transistor and controls the electronic propulsion device.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model discloses an escalator safety clearance detection device, which adopts a non-contact clearance measurement mode, can perform real, high-precision and non-contact measurement on the clearance between a step and an apron plate while not affecting the operation of an escalator, and can obtain a measurement result more quickly, accurately and intuitively by matching with a method applied to the escalator safety clearance detection device of the device. Compared with the traditional roller measurement, the method has the characteristics of high measurement accuracy and strong anti-interference performance.
Drawings
Fig. 1 shows a schematic view of an escalator safety gap detection device module;
fig. 2 shows an installation diagram of an escalator safety gap detection device;
FIG. 3 shows a schematic diagram of a measurement host module;
FIG. 4 shows a schematic diagram of a gap measurement module;
FIG. 5 shows a longitudinal cross-sectional view of the gap measurement module;
FIG. 6 is a schematic diagram showing the internal structure of the displacement measurement marking module;
FIG. 7 shows a perspective view of a displacement measurement marking module;
FIG. 8 shows a longitudinal cross-sectional view of a displacement measurement marking module;
fig. 9 shows a first gap measurement sensor unit, a second gap measurement sensor unit drive circuit diagram;
FIG. 10 shows a schematic diagram of a marker drive circuit;
FIG. 11 shows a flow chart of a software system embedded in the measurement host module 1;
in the figure, 1, a measuring host module; 11. a first gap measurement sensor unit; 12. a first edge alignment plate; 2. a gap measurement module; 21. a second gap measurement sensor unit; 22. a data line port; 23. a second edge alignment plate; 24. a second driving circuit; 3. a displacement measurement marking module; 31. a step locking structure; 311. locking the pull ring; 312. locking the plugboard; 32. an encoder elastic means; 33. an encoder wheel; 34. an electronic propulsion device; 35. an over-standard marking unit; 36. inserting plate; 37. a mark driving circuit; 38. a locking knob; 4. and operating the terminal module.
Detailed Description
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the escalator safety gap detection device disclosed by the utility model is divided into four modules: the device comprises a measuring host module 1, a gap measuring module 2, a displacement measuring and marking module 3 and an operation terminal module 4. The input end of the measuring host module 1 is connected with the gap measuring module 2, the displacement measuring marking module 3 is in signal connection with the measuring host module 1, and the operation terminal module 4 is in signal connection with the measuring host module 1; the measuring host module 1 is used for measuring the gap size at one side of the escalator and transmitting data to the operation terminal module 4; the gap measuring module 2 is used for measuring the gap size at the other side of the escalator and transmitting data to the measuring host module 1; the displacement measurement marking module 3 is used for measuring the running speed and displacement of the escalator and transmitting data to the measurement host module 1; the measuring host module 1 also has a displacement measuring driving interface and an operation function, and the operation terminal module 4 is used for receiving and storing data and drawing a time curve of the measured gap and the speed displacement.
As shown in fig. 3, the measurement host module 1 includes a first gap measurement sensor unit 11, a battery, a power line, an antenna, and a first driving circuit, and also has a first edge alignment board 12 on the measurement host module 1 side.
As shown in fig. 4 and 5, the gap measuring module 2 includes a second gap measuring sensor unit 21, a battery, a charging hole, a charging indicator lamp, a data line port 22 connected with the measuring host module 1, a second edge alignment board 23 located at the other side of the gap measuring module 2, and a second driving circuit 24.
As shown in fig. 6 to 8, the displacement measurement marking module 3 is used for collecting the running speed of the escalator and marking the exceeding position of the gap of the apron plate; the device comprises a step locking structure 31, wherein the step locking structure 31 consists of a locking pull ring 311 and a locking plugboard 312, the locking pull ring 311 is positioned on the outer edge of a displacement measurement marking module 3, the locking plugboard 312 is internally provided with the displacement measurement marking module 3, and the locking plugboard 312 can be driven to horizontally move by pulling the locking pull ring 311; the automatic displacement measuring and marking device further comprises an encoder elastic device 32, an encoder wheel 33, an electronic propulsion device 34, a marking driving circuit 37, a locking knob 38 and an exceeding marking unit 35, wherein one end of the encoder elastic device 32 is internally arranged in the displacement measuring and marking module 3, the other end of the encoder elastic device is connected with the encoder wheel 33, one end of the locking knob 38 and the encoder elastic device 32, and the rotating locking knob 38 can drive the encoder elastic device 32 to rotate by driving the encoder wheel 33 to rotate so as to enable the encoder wheel 33 to rotate to a proper position; the encoder wheel 33 is positioned on the outer edge of the displacement measurement marking module 3, on the opposite side of the step locking structure 31; the electronic propulsion device 34 is disposed in the displacement measurement marking module 3 and is used for driving the standard exceeding marking unit 35, one end of the standard exceeding marking unit 35 is disposed in the displacement measurement marking module 3, the marking end of the other end is disposed outside the displacement measurement marking module 3, and the lower edge of the displacement measurement marking module 3 opposite to the step locking structure 31 is further provided with a plugboard 36.
The actual using method comprises the following steps:
s1: fixing the measuring host module 1 and the gap measuring module 2 at the left and right ends of the bottommost or topmost step tread, fixing the displacement measuring mark module 3 on the skirt board, and fully contacting the encoder wheel 33 with the step tread;
s2: starting measurement software embedded into the measurement host module 1 and starting a measurement program;
s3: starting the elevator to run upwards or downwards, measuring the gap data of the left side and the right side wall skirtboards of the elevator by using the measuring host module 1 and the gap measuring module 2, and simultaneously receiving the information of the displacement measuring marking module 3 by using the measuring host module 1 and calculating the displacement and the speed;
s4: the measurement host module 1 judges the results of all the measurement data, and if the measurement data are not qualified, the over-standard marking unit 35 in the displacement measurement marking module 3 is started to perform abnormal marking;
s5: transmitting the measurement data to an operation terminal module 4, receiving and storing the data by the operation terminal module 4, and drawing a time curve of the measured gap and the speed displacement;
s6: when the measuring host module 1 and the gap measuring module 2 move to the other end of the escalator along with the steps, the operation of the elevator is stopped and the measuring equipment is taken down.
Specifically, in the installation of the present utility model, as shown in fig. 2, the measuring host module 1 and the gap measuring module 2 are fixed at the left and right ends of the lowermost or uppermost step tread, the first edge alignment plate 12 of the measuring host module 1 is aligned with one end of the step, the second edge alignment plate 23 of the gap measuring module 2 is aligned with the other end of the step, the displacement measuring mark module 3 is fixed on the skirt board, the locking pull ring 311 is pulled to drive the locking insert plate 312, the locking insert plate 312 and the insert plate 36 are inserted into the proper positions of the step tread, then the locking pull ring 311 is released to fix the displacement measuring mark module 3 to the step, and the locking knob 38 is rotated to rotate the encoder wheel 33 to the proper positions, and when the encoder wheel 33 is inclined at the same angle with the step tread, the locking knob 38 is locked, and the encoder wheel 33 is fully contacted with the step tread. The measurement software embedded in the measurement host module 1 is started and the measurement program is started, and the measurement host module 1, the gap measurement module 2 and the displacement measurement marking module 3 are removed. In the elevator operation process, the measuring host module 1MCU collects left side and right side wall apron board clearance data according to 100Hz frequency, and simultaneously collects incremental rotary encoder information and calculates displacement and speed. The MCU of the measurement host module 1 judges the result of all the measurement data, if the measurement host module 1 is unqualified, the over-standard marking unit 35 is started to perform abnormal marking, when an abnormal position occurs, the measurement host module 1 sends an ERROR signal to the over-standard marking unit 35, after the over-standard marking unit 35 receives the signal, the electromagnetic coil of the electronic propulsion device 34 is started through the mark driving circuit 37, electromagnetic force generated by the electromagnetic coil drives the fixing device of the marker in the over-standard marking unit 35, so that the marker is rapidly propelled towards the apron plate direction, marks on the apron plate of the escalator, and the over-standard marking unit 35 acts on the apron plate of the escalator and leaves a measurement mark. And meanwhile, whether the data result is qualified or not, the data is sent to the operation terminal module 4 through a Bluetooth wireless module and the like, the operation terminal module 4 receives and stores the data, and a time curve of the measured gap and the measured speed displacement is drawn. And judging the measurement result at the same time, and prompting the measurement result through digital and voice broadcasting.
As shown in fig. 11, the software flowchart embedded in the measuring host module 1 is that, first, the detecting device is started, the hardware is initialized, when a measuring instruction is received, the measuring host module 1 receives information, acquires left-right gap data and displacement data, and performs data calculation, where the calculation method is a method known to those skilled in the art, that is, the calculation method is compared with the current escalator safety gap standard. At this time, the elevator starts to run upwards or downwards, and when the detection device runs to the other end of the escalator along with the steps, the elevator stops running.
The hardware system involved in the detection device comprises a laser, a laser driving circuit, a linear array camera, an optical system, a DSP processing system, a man-machine interaction interface and A/D conversion. The DSP controls the laser to enable laser to form light spots through the lens after passing through the collimation system, the light spots are irradiated onto the detected elevator skirt guard board, after the linear display camera receives the reflected signals, the signals are amplified and processed through the AD conversion circuit under the action of the DSP control circuit and then sent to the DSP for digital processing, and then the measurement results are transmitted through man-machine interaction.
As shown in fig. 9, the first driving circuit in the first gap measurement sensor unit 11 and the second driving circuit 24 in the second gap measurement sensor unit 21 are composed of a DAC chip U2, an operational amplifier U1, a high-power fet Q1, a sampling resistor Rs, current limiting resistors R2, R4, filter capacitors C2, C3, a feedback resistor R1, a switching fet Q2, and the like. The DSP controls the DAC chip U2 through the I2C interface, the U2 outputs a voltage signal to a voltage follower circuit formed by U1A, and then outputs the voltage signal to a constant current drive circuit formed by U1B and Q1 through a current limiting resistor R2. K1 may control the switching of the laser.
As shown in fig. 10, the tag driving circuit 37 of the starting electronic propulsion device 34 is isolated from the measurement host module 1 by the chip U3, and is connected with the measurement host module 1 by the current limiting of the current limiting resistor R4; the U3 output directly drives the darlington transistor and controls the electronic propulsion device 34.
The measurement principle involved in the present detection device is as follows:
1. principle of gap measurement
The gap measurement system is that a laser transmitter transmits visible red laser light to the surface of the skirt guard plate of the escalator through a group of lenses. The laser scattered by the surface of the escalator skirt guard passes through the receiver lens and is received by the internal linear array camera. The array camera may be set at different angles to track this visible red laser spot, depending on the distance. Based on this angle and the known distance between the laser and the camera, a Digital Signal Processor (DSP) can calculate the distance between the array camera and the skirt panel of the escalator. Meanwhile, the position of the visible light beam on the receiving element is processed by an analog and digital circuit, and a corresponding output value is calculated through analysis of a Microprocessor (MCU). The semiconductor laser beam is perpendicular to the surface of the escalator skirt guard plate, so that only one accurate focusing position exists, and images at other positions are in high focusing states with different degrees. In addition, high focusing can cause dispersion of red image points, thereby reducing measurement accuracy. In order to improve accuracy, θ1 and θ2 must satisfy:
tanθ 1 ＝ktanθ 2
where k is the magnification in the lateral direction. At this time, the measuring point in a certain depth of field can focus and image on the detector, guaranteeing the precision. If the displacement of the light spot on the imaging plane is x 1 ' the proportional relationship between the sides of similar triangles is utilized. Displacement x of measured surface 1 (left step, tread or tape to apron gap) can be found according to the following equation:
wherein alpha is the distance from the intersection point of the optical axis of the laser beam and the receiving optical axis to the front main surface of the receiving lens
b is the imaging surface receiving the distance from the rear major surface of the lens to the center point.
θ1 is the included angle between the optical axis of the laser beam and the optical axis of the receiving lens,
θ2 is the angle between the measurement normal and the optical axis of the receiving lens.
X is the same as that of 2 (right step, tread or tape to apron gap) can be found according to the following formula:
pass judgment principle of apron plate gap: if x 1 ≤4mm、x 1 X is less than or equal to 4mm 1+ x 2 Judging whether the test is qualified if the test is less than or equal to 7 mm; otherwise, the test result is judged to be unqualified.
2. Principle of gap measurement signal
The TMS320F2812 built-in 16-way 12-bit high-resolution A/D conversion circuit is adopted to realize real-time sampling of analog signals, the minimum conversion time of each channel is 80ns, and the input signal level range of the A/D conversion circuit is 0-3V. After sampling, an adaptive filter algorithm is employed. The following three steps are circularly calculated, so that the process of infinitely approaching d (n) by y (n), namely, the distance measurement error e (n), is smaller and smaller.
And (3) filtering: y (n) =w T (n)x(n)
And (3) error calculation: e (n) =d (n) -y (n)
Updating the filter coefficients: w (n+1) =w (n) +2μe (n) x (n)
x (n): filter input signal
y (n): filter output signal
d (n): target signal
e (n): error signals of d (n) and y (n), e (n) =d (n) -y (n)
w (n): n filter coefficients.
x (n): a signal, defined as x (N) = [ x (N), x (N-1),. The term x (N-n+1)] T
3. Two-side synchronous measurement and displacement measurement principle
The MCU adopts an ARM kernel singlechip, the main frequency is up to more than 72MHz, and the synchronism of the left and right gap measurement can be up to within 50 us. An external incremental encoder may be directly connected to the MCU without the need for external interface logic. The differential output of the encoder is converted to a digital signal using a comparator at the same time, which greatly increases the noise immunity.
The speed and displacement adopt an incremental encoder, the number of output pulses of the encoder disc is m, the number of effective pulses counted in time t is n, the diameter of the speed measuring wheel is D, the circumference ratio is pi, and the conversion formula of the escalator speed V is as follows:
V＝nπD/mt
the conversion formula of the escalator displacement S is as follows:
s=Σni (where i=1, 2,3 …)
The specific implementation can be realized by the following two methods, namely, detecting the rising edge of A by using the interrupt, judging the level of B when triggering the interrupt, and determining whether the count value is increased or decreased; the other is to set the timer to the encoder mode, directly read the count value and direction.
The operation software controls the working state of the equipment through the control instruction, judges the received data and generates the time, the speed, the displacement, the gap and other graphics to display. When the whole-process measurement does not exceed the standard, the measurement result is displayed to be qualified, the left maximum gap, the right maximum gap, the left and right gaps and the maximum value are arranged in parallel, and meanwhile, intelligent voice broadcasting is performed: "measurement result is qualified". When the gap data exceeds the standard, the gap data and the exceeding standard position are immediately displayed, and meanwhile intelligent voice broadcasting is immediately carried out: "left side out of standard 2.34 meters from the start point", "right side out of standard 2.45 meters from the start point" or "left and right clearance and out of standard 2.34 meters.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. An escalator safety clearance detection device, which is characterized in that: the device comprises a measuring host module (1), a gap measuring module (2) connected with the input end of the measuring host module (1), a displacement measuring marking module (3) connected with the measuring host module (1) in a signal mode and an operation terminal module (4) connected with the measuring host module (1) in a signal mode; the measuring host module (1) is used for measuring the gap size at one side of the escalator and transmitting data to the operation terminal module (4); the gap measuring module (2) is used for measuring the gap size at the other side of the escalator and transmitting data to the measuring host module (1); the displacement measurement marking module (3) is used for measuring the running speed and displacement of the escalator and transmitting data to the measurement host module (1); the operation terminal module (4) is used for receiving and storing data and drawing a time curve of the measured gap and the speed displacement.
2. The escalator safety gap detection device according to claim 1, wherein: the measuring host module (1) comprises a first gap measuring sensor unit (11), a battery and a power line, wherein a first edge alignment plate (12) is further arranged on one side of the measuring host module (1), and the measuring host module further comprises a first driving circuit in the first gap measuring sensor unit (11).
3. The escalator safety gap detection device according to claim 1, wherein: the gap measurement module (2) comprises a second gap measurement sensor unit (21), a battery, a charging hole, a charging indicator lamp, a data line port (22) connected with the measurement host module (1), a second edge alignment plate (23) positioned on one side of the gap measurement module (2), and a second driving circuit (24) in the second gap measurement sensor unit (21).
4. The escalator safety gap detection device according to claim 1, wherein: the displacement measurement marking module (3) is used for collecting the running speed of the escalator and marking the exceeding position of the apron plate gap; the locking device comprises a step locking structure (31), wherein the step locking structure (31) consists of a locking pull ring (311) and a locking plugboard (312), the locking pull ring (311) is positioned on the outer edge of a displacement measurement marking module (3), the locking plugboard (312) is internally arranged in the displacement measurement marking module (3), and the locking plugboard (312) can be driven to horizontally move by pulling the locking pull ring (311); the automatic displacement measuring device comprises an encoder elastic device (32), an encoder wheel (33), an electronic propulsion device (34), an exceeding mark unit (35), a mark driving circuit (37) and a locking knob (38), wherein one end of the encoder elastic device (32) is internally provided with a displacement measuring mark module (3), the other end of the encoder elastic device is connected with the encoder wheel (33), one end of the locking knob (38) is internally provided with the displacement measuring mark module (3) and is connected with the encoder elastic device (32), and the other end of the locking knob is arranged on the outer edge of the displacement measuring mark module (3); the encoder wheel (33) is positioned on the outer edge of the displacement measurement marking module (3) and is opposite to the step locking structure (31); the electronic propulsion device (34) is internally provided with a displacement measurement marking module (3) and is used for driving an exceeding marking unit (35), one end of the exceeding marking unit (35) is internally provided with the displacement measurement marking module (3), the marking end at the other end is arranged outside the displacement measurement marking module (3), and the lower edge of the side opposite to the step locking structure (31) of the displacement measurement marking module (3) is further provided with an inserting plate (36).
5. The escalator safety gap detection device according to claim 2, wherein: the circuit is a first driving circuit in a first gap measurement sensor unit (11), and consists of a DAC chip U2, an operational amplifier U1, a high-power field effect transistor Q1, a sampling resistor Rs, current limiting resistors R2 and R4, filter capacitors C2 and C3, a feedback resistor R1 and a switching field effect transistor Q2.
6. An escalator safety gap detection device according to claim 3, wherein: the circuit is a second driving circuit (24) in a second gap measurement sensor unit (21), and consists of a DAC chip U2, an operational amplifier U1, a high-power field effect transistor Q1, a sampling resistor Rs, current limiting resistors R2 and R4, filter capacitors C2 and C3, a feedback resistor R1 and a switching field effect transistor Q2.
7. The escalator safety gap detection device according to claim 4, wherein: the marking driving circuit (37) is isolated from the measuring host module (1) through a chip U3, and is connected with signals of the measuring host module (1) through current limiting of a current limiting resistor R4; the U3 output directly drives the Darlington composite transistor and controls the electronic propulsion device (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320525974.6U CN219652466U (en) | 2023-03-17 | 2023-03-17 | Escalator safety clearance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320525974.6U CN219652466U (en) | 2023-03-17 | 2023-03-17 | Escalator safety clearance detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219652466U true CN219652466U (en) | 2023-09-08 |
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