Simple elevator door circuit detection circuit system

Abstract

The present invention relates to a detection circuit system for the door circuit of a simple elevator, including a simple elevator. The simple elevator includes a box body, a camera is provided at the top of the box body, a simple elevator inner door and a simple elevator landing door are respectively arranged on the front of the box body from inside to outside. A characteristic sticker is arranged on the simple elevator inner door and faces the side of the camera. An opening button is arranged in the middle on the right side of the simple elevator landing door. The detection circuit system detects the following contents: the operation condition of the simple elevator motor, the signal of the opening button, comparing the length of the characteristic sticker detected by the camera, judging the loop condition by the signals of the landing door loop relay and the inner door loop relay, the safety circuit of the simple elevator, the camera detection circuit and the detection circuit for the door circuit of the simple elevator. The present invention can timely discover the potential safety hazards caused by artificially short-circuiting the contacts in the door circuit of the simple elevator, and effectively reduce the occurrence of safety accidents.

Description

Technical Field

[0001] The present invention relates to the technical field of simple elevators, and more specifically, to a detection circuit system for the door circuit of a simple elevator. Background Art

[0002] A simple elevator is an alternative product to a conventional elevator developed to meet the need of production units for vertical cargo transportation under the premise of meeting basic safety, based on the concept of low investment, low cost, and high efficiency. Different from a conventional elevator, a simple elevator can only transport goods and cannot carry passengers. At the same time, to reduce costs, the landing doors and car doors of a simple elevator are manually closed instead of automatically. Relying on the improvement of the elevator control system, the safety performance of a conventional elevator has been greatly improved. Before the implementation of TSG T7007-2016 "Rules for Elevator Type Tests", that is, before January 1, 2018, considering that when the elevator car door or landing door is in the open state, if the elevator continues to operate, passengers are at risk of being sheared and squeezed by the landing door and car door. The technical measure taken by the elevator control system is to ensure that the elevator can only start and run when the elevator car door and landing door are in the closed state through the elevator door circuit, and the car door lock or landing door lock contacts are all safety contacts with very reliable opening or closing actions, which can ensure that when the elevator door is opened, the door lock contacts can be reliably opened. However, there is a risk in this early technical solution that will cause the loss of this reliable disconnection, that is, if there is an intentional or unintentional human short circuit, there is a risk that the elevator door is open while the elevator can still run normally, posing a great danger to personal safety. To eliminate this risk, around 2016, many invention patents provided detection functions and methods for elevator door circuits, which can detect and eliminate potential safety hazards caused by intentional human short circuits of elevator landing door locks or car door locks. Since January 1, 2018, the implementation of TSG T7007-2016 "Rules for Elevator Type Tests" has more strongly required that the elevator control system must have an elevator door circuit detection function. Since then, the elevator door circuit detection function has been continuously improved, and in practice, the standardized PESSRAL system has gradually been adopted for implementation, greatly improving the safety of elevators.

[0003] Compared with conventional elevators, simple lifts still do not have a door loop detection function so far. However, in fact, the safety hazards brought about by the disappearance of the safety protection function of the simple lift during the door closing operation due to the artificial short - circuit of the door lock are more prominent than those of conventional elevators. Because the users of simple lifts have the following interest - driven motives: After short - circuiting the door loop, sometimes the door opening and closing time can be saved, and the cargo transportation efficiency can be improved. Safety accidents caused by door lock short - circuiting occur frequently and are extremely harmful. At present, simple lifts mainly rely on strict supervision to prevent the door lock from being short - circuited, rather than relying on technical means like conventional elevators to prevent the normal operation of the equipment once the door lock is detected to be short - circuited through the door loop detection means. It is technically difficult to implement the door loop detection function in conventional elevators in simple lifts. The elevator door loop detection circuits, methods or systems provided in the existing patent technologies, and the general PESSRAL - based door loop detection methods cannot be used in simple lifts because the landing doors and car doors of simple lifts are manually closed instead of automatically, and it is impossible to determine the timing of door loop detection based on the automatic opening of the elevator landing doors and car doors. At the same time, simple lifts have very strict requirements on the economy of the door loop detection scheme. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a door loop detection circuit system for a simple lift, which can timely detect the safety hazards caused by the artificial short - circuit of the contacts in the door loop of the simple lift and effectively reduce the occurrence of safety accidents.

[0005] The technical solution adopted by the present invention to solve its technical problems is: to construct a door loop detection circuit system for a simple lift, including a simple lift. The simple lift includes a box body, a camera is arranged at the top of the box body, a simple lift inner door and a simple lift landing door are respectively arranged from the inside to the outside on the front of the box body. A feature sticker is arranged on the simple lift inner door and faces the side of the camera. An open - door button is arranged in the middle of the right side of the simple lift landing door. The detection circuit system detects the following contents: the operation condition of the simple lift motor, the open - door button signal, by comparing the length of the feature sticker detected by the camera, judging the loop condition by the signals of the landing door loop relay and the inner door loop relay, the simple lift safety circuit, the feature sticker length detection circuit and the simple lift door loop detection circuit.

[0006] According to the above - mentioned scheme, the door loop of the simple lift includes a simple lift landing door loop and a simple lift inner door loop.

[0007] According to the above - mentioned scheme, the feature sticker is used to facilitate the camera to capture the features of the simple lift inner door, and the feature sticker uses an image - processing algorithm to obtain a detectable length to realize the signal detection of the opening and closing of the simple lift door.

[0008] According to the above solution, the detection circuit of the simple elevator door circuit includes the following parts: The detection signal relay switch is connected to the single-chip microcomputer interface X01, the inner door relay switch is connected to the single-chip microcomputer interface X02, and the landing door relay switch is connected to the single-chip microcomputer interface X03; The single-chip microcomputer interface Y02 is connected to the landing door fault alarm light to output a low level, and the single-chip microcomputer interface Y01 is connected to the inner door fault alarm light to output a high level; The single-chip microcomputer interface Y01 is connected to the inner door fault alarm light, and the single-chip microcomputer interface Y02 is connected to the landing door fault alarm light.

[0009] According to the above solution, the detection method of the detection circuit of the simple elevator door circuit includes the following steps:

[0010] S100. Detect the operation status of the simple elevator motor;

[0011] S200. Detect the signal of the simple elevator door opening button;

[0012] S300. Compare the length of the feature sticker detected by the camera;

[0013] S400. Detect the signals of the simple elevator landing door circuit relay and the simple elevator inner door circuit relay, and judge the status of the door circuit.

[0014] According to the above solution, the detection circuit of the feature sticker length includes the following parts: The normally open switch control signal of the simple elevator motor signal is input to the X01 interface of the camera processor. When the motor is running normally, the X01 interface of the camera receives a high level, and the camera collects the length L1 of the feature sticker and stores it in the M1 register. If the sticker length L1 in the M1 register < the set value S1 at this time, the fault reset relay is energized and closed; When the motor stops running, the X02 interface of the camera receives a high level, the camera collects the length L2 of the feature sticker and stores it in the M2 register. When (L1 - L2) / L1 ≥ the set value S2, the camera interface Y01 outputs a high level, and the detection signal relay is energized and closed; The normally closed switch of the simple elevator motor signal, the flat layer switch set and the door opening signal relay switch are connected in series, and the flat layer switch set is composed of multiple flat layer switches connected in parallel.

[0015] According to the above solution, the detection method of the detection circuit of the feature sticker includes the following steps:

[0016] S201. Detect the simple elevator motor signal;

[0017] S202. Judge whether the motor stops working;

[0018] S203. If the motor does not stop working, detect the length of the feature sticker once and store it in the register M1;

[0019] S204. Whether the door opening button is pressed;

[0020] S205. Whether the stored length L1 in M1 is less than the set value S1;

[0021] S206. Detect the length L2 of the feature sticker and store it in the register M2;

[0022] S207. Determine whether the camera is blocked, and the elevator runs to the next floor and stops;

[0023] S208. Calculate (L1 - L2) / L1 and store the calculation result in the register M3;

[0024] S209. Whether the value in M3 is greater than the set value S2;

[0025] S210. Detect that the switch is closed.

[0026] According to the above solution, the safety circuit of the simple elevator includes a simple elevator safety limit circuit composed of a series connection of a safety switch and a safety switch relay, a series inner door detection circuit composed of an inner door switch and an inner door switch relay, and a landing door detection circuit composed of a series connection of landing door switches and landing door switch relays on each floor; the main circuit of the safety circuit of the simple elevator is protected by a series connection of a three-phase circuit breaker, a thermal relay, and a phase sequence protection relay; the start and stop of the simple elevator motor are controlled by a main power contactor, the upward movement of the simple elevator is controlled by an upward movement contactor, and the downward movement of the simple elevator is controlled by a downward movement contactor; the travel of the simple elevator is controlled by a flame-out limit switch, the power of the simple elevator is provided by a three-phase asynchronous AC motor, the control terminals of the start, stop, upward movement, and downward movement of the simple elevator are completed by a parallel connection of a main power contactor relay, an upward movement contactor relay, and a downward movement contactor relay, the start of the simple elevator motor is restricted when the safety switch is opened, or the landing door is opened, or the inner door is opened, the landing door and the inner door of the simple elevator are controlled to open and close by a front door relay, the simple elevator is controlled to reset by a fault reset relay switch, and the safety switch relay switch, the landing door switch relay switch, and the inner door switch relay switch are connected in series.

[0027] According to the above solution, the method for detecting the door circuit signal of a simple elevator includes the following steps:

[0028] S301. Detect the detection switch signal;

[0029] S302. Detect whether the switch is closed;

[0030] S303. Read the inner door relay signal and the landing door relay signal of the simple elevator;

[0031] S304. Whether both the inner door relay and the landing door relay are in a de-energized state;

[0032] S305. The door circuit is normal;

[0033] S306. Whether the relay of the inner door of the simple elevator is de-energized;

[0034] S307. Whether the relay of the landing door of the simple elevator is de-energized;

[0035] S308. The landing door circuit of the simple elevator is short-circuited, and the landing door fault light is on;

[0036] S309. The inner door circuit of the simple elevator is short-circuited, and the inner door fault light is on;

[0037] S310. Both the inner door circuit and the landing door circuit of the simple elevator are short-circuited, and the inner door fault light and the landing door fault light are on.

[0038] Implementing the door circuit detection circuit and system of the simple elevator of the present invention has the following beneficial effects:

[0039] 1. The present invention can timely detect potential safety hazards caused by artificially short-circuiting the contacts in the door circuit of the simple elevator, effectively reducing the occurrence of safety accidents;

[0040] 2. The present invention can separately monitor the inner door circuit and the landing door circuit of the simple elevator, avoiding the problem that it is impossible to determine which circuit is short-circuited during monitoring when the inner door switch and the landing door switch of the simple elevator are in series. When a short-circuit occurs, potential safety hazards can be eliminated in a timely manner;

[0041] 3. The present invention avoids misjudgment caused by the change in the length of the feature sticker collected by the camera due to the shaking of the cargo box during the movement of the simple elevator, thereby triggering a detection signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0043] Figure 1 is the flowchart of the door circuit detection method of the simple elevator in the embodiment of the present invention;

[0044] Figure 2 is the circuit diagram of the safety circuit of the simple elevator in the embodiment of the present invention;

[0045] Figure 3 is the flowchart of the feature sticker detection method in the embodiment of the present invention;

[0046] Figure 4 is the circuit diagram of the feature sticker detection circuit in the embodiment of the present invention;

[0047] Figure 5 is the flowchart of the door circuit signal detection method of the simple elevator in the embodiment of the present invention;

[0048] Figure 6 is the circuit diagram of the signal detection circuit for the door circuit of the simple elevator in the embodiment of the present invention;

[0049] Figure 7 is the structural schematic diagram of the simple elevator in the embodiment of the present invention;

[0050] Figure 8 is a template of the system working flow chart for determining the set value;

[0051] In the figure: safety electricity of the simple elevator: 101, safety switch, 102, safety switch relay, 103, inner door switch, 104, inner door switch relay, 105, first floor landing door switch, 106, second floor landing door switch, 107, third floor landing door switch, 108, fourth floor landing door switch, 109, landing door switch relay, 110, three-phase circuit breaker, 111, thermal relay, 112, phase sequence protection relay, 113, main power contactor, 114, upward contactor, 115, downward contactor, 116, fire cut-off limiter, 117, three-phase AC asynchronous motor, 118, safety switch relay switch, 119, inner door switch relay switch, 120, landing door switch relay switch, 121, main power contactor relay, 122, upward contactor relay, 123, downward contactor relay, 124, front door relay, 125, fault reset relay switch;

[0052] Camera detection circuit: 201, normally open switch of the simple elevator motor signal, 202, normally closed switch of the simple elevator motor signal, 203, first floor leveling switch, 204, second floor leveling switch, 205, third floor leveling switch, 206, fourth floor leveling switch, 207, opening signal relay switch, 208, detection signal relay, 209, fault reset relay;

[0053] Simple elevator door circuit detection circuit: 301, detection signal relay switch, 302, inner door relay switch, 303, landing door relay switch, 304, inner door short-circuit alarm lamp, 305, landing door short-circuit alarm lamp;

[0054] Simple elevator: 401, landing door, 402, inner door, 403, door opening button, 404, feature sticker, 405, camera. Detailed implementation manners

[0055] For a clearer understanding of the technical features, purposes and effects of the present invention, the detailed implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0056] As Figure 1-7As shown in the figure, the simple elevator door circuit detection circuit system of the present invention includes a simple elevator. The simple elevator includes a box body, a camera is provided at the top of the box body, a simple elevator inner door and a simple elevator landing door are respectively arranged on the front of the box body from inside to outside. A characteristic sticker is arranged on the simple elevator inner door and faces the side of the camera. An opening button is arranged in the middle on the right side of the simple elevator landing door. The detection circuit system detects the following contents: the operation condition of the simple elevator motor, the signal of the opening button, by comparing the length of the characteristic sticker detected by the camera, judging the circuit condition by the signals of the landing door circuit relay and the inner door circuit relay, the simple elevator safety circuit, the camera detection circuit and the simple elevator door circuit detection circuit. The simple elevator door circuit includes a simple elevator landing door circuit and a simple elevator inner door circuit. The characteristic sticker is used to facilitate the camera to capture the characteristics of the simple elevator inner door. The characteristic sticker uses an image processing algorithm to obtain a detectable length to realize the signal detection of the opening and closing of the simple elevator door. In the simple elevator of the present invention, the opening and closing of the simple elevator landing door and the inner door follow the principle of opening the landing door first and then the inner door, and both the landing door and the inner door are manually opened and closed. Figure 3 As can be seen, the characteristic sticker is pasted on the inner door of the freight elevator. The inner door of the freight elevator is a retractable door. When the door is opened, part of the characteristic sticker will be blocked. The camera will compare the remaining length of the characteristic sticker detected again with the length detected originally.

[0057] The method for detecting the simple elevator door circuit includes the following steps:

[0058] S100. Detect the operation condition of the simple elevator motor;

[0059] S200. Detect the signal of the simple elevator opening button;

[0060] S300. Compare the length of the characteristic sticker detected by the camera;

[0061] S400. Detect the signals of the simple elevator landing door circuit relay and the simple elevator inner door circuit relay, and judge the condition of the door circuit.

[0062] In a preferred embodiment of the present invention, there is a safety circuit for a simple elevator. The safety switch 101 is connected in series with the safety switch relay 102 to form a safety limit circuit for the simple elevator; the inner door switch 103 and the inner door switch relay 104 are connected in series to form an inner door detection circuit; the first floor landing door switch 105, the second floor landing door switch 106, the third floor landing door switch 107, the fourth floor landing door switch 108 and the landing door switch relay 109 are connected in series to form a landing door detection circuit; the relays of the three circuits jointly control the start and stop of the motor; the three-phase circuit breaker 110, the thermal relay 111, and the phase sequence protection relay 112 are connected in series to protect the main circuit. The main power contactor 113 controls the start and stop of the simple elevator motor. The upward contactor 114 controls the upward movement of the simple elevator, and the downward contactor 115 controls the downward movement of the simple elevator. The fire cut-off limiter 116 limits the travel of the simple elevator to prevent accidents. The three-phase asynchronous AC motor 117 provides power for the simple elevator; the main power contactor relay 121, the upward contactor relay 122, and the downward contactor relay 123 are connected in parallel as the control terminals for the start, stop, upward movement, and downward movement of the simple elevator. The safety switch relay switch 118, the landing door switch relay switch 119, and the inner door switch relay switch 120 are connected in series to limit the start of the simple elevator motor when the safety switch is turned off, or the landing door is opened, or the inner door is opened. The front door relay 124 controls whether the landing door and the inner door can be opened. The fault reset relay switch 125 controls the reset of the simple elevator.

[0063] The method for detecting the feature sticker includes the following steps:

[0064] S201. Detect the signal of the simple elevator motor;

[0065] S202. Determine whether the motor has stopped working;

[0066] S203. If the motor has not stopped working, detect the length of the feature sticker once and store it in the register M1;

[0067] S204. Whether the door opening button is pressed;

[0068] S205. Whether the stored length L1 in M1 is less than the set value S1;

[0069] S206. Detect the length L2 of the feature sticker and store it in the register M2;

[0070] S207. Determine whether the camera is blocked, and the elevator stops running when it reaches the next floor;

[0071] S208. Calculate (L1 - L2) / L1, and store the calculation result in the register M3;

[0072] S209. Whether the value in M3 is greater than the set value S2;

[0073] S210. The detection switch is closed.

[0074] The feature sticker of the feature sticker detection method is pasted on the inner door of the simple elevator. The camera has a built-in image processing algorithm that can identify the length of the feature sticker. The length of the feature sticker detected by the camera is the key information for judging whether the simple elevator door opens. It is judged whether the inner door of the simple elevator opens by the length of the feature sticker collected by the camera, and then the timing of detecting the elevator door circuit is controlled.

[0075] In a preferred embodiment of the present invention, the feature sticker detection circuit: The normally open switch 201 of the simple elevator motor signal controls the signal input to the X01 interface of the camera processor. When the motor is running normally, the normally open switch 201 of the simple elevator motor signal is closed, the X01 interface of the camera receives a high level, and the camera collects the length of the feature sticker and stores it in the M1 register. If the length L1 of the sticker in the M1 register is less than the set value S1 at this time, the fault reset relay 209 is energized and closed; The normally closed switch 202 of the simple elevator motor signal, the flat layer switch set and the open door signal relay switch 207 are connected in series. When the motor stops running, a certain layer of flat layer switch is closed and the staff presses the open door button, the X02 interface of the camera receives a high level, and the camera collects the length of the feature sticker and stores it in the M2 register; The flat layer switch set is composed of a first layer flat layer switch 203, a second layer flat layer switch 204, a third layer flat layer switch 205 and a fourth layer flat layer switch 206 connected in parallel; The camera processor compares the length L1 stored in the M1 register with the length L2 stored in the M2 register, calculates (L1 - L2) / L1, and when (L1 - L2) / L1 is greater than the set value S2, the camera interface Y01 outputs a high level, and the detection signal relay 208 is energized and closed. The set values S1 and S2 can be actually adjusted according to the working environment and are not limited to a certain specific set value.

[0076] The method for detecting the elevator door circuit signal of the simple elevator includes the following steps:

[0077] S301: Detect the detection switch signal;

[0078] S302: Check whether the detection switch is closed;

[0079] S303: Read the inner door relay signal and the landing door relay signal of the simple elevator;

[0080] S304: Whether both the inner door relay and the landing door relay are de-energized;

[0081] S305: The door circuit is normal;

[0082] S306: Whether the inner door relay of the simple elevator is de-energized;

[0083] S307: Whether the relay of the landing door of the simple elevator is de-energized;

[0084] S308: The landing door circuit of the simple elevator is short-circuited, and the landing door fault light is on;

[0085] S309: The inner door circuit of the simple elevator is short-circuited, and the inner door fault light is on;

[0086] S310: Both the inner door circuit and the landing door circuit of the simple elevator are short-circuited, and the inner door fault light and the landing door fault light are on.

[0087] In a preferred embodiment of the present invention, the signal detection circuit for the elevator door circuit of the simple elevator: The detection signal relay switch 301 is connected to the single-chip microcomputer interface X01; the inner door relay switch 302 is connected to the single-chip microcomputer interface X02; the landing door relay switch 303 is connected to the single-chip microcomputer interface X03; when the detection signal relay 208 is energized and closed, the detection signal relay switch 301 is closed, the single-chip microcomputer interface X01 receives a high level, reads the signals of the single-chip microcomputer interface X02 and the single-chip microcomputer interface X03. If both received by the single-chip microcomputer X02 interface and the single-chip microcomputer X03 interface are low levels, then the single-chip microcomputer interface Y02 outputs a low level, and there is no short-circuit in the elevator door circuit of the simple elevator. If the single-chip microcomputer interface X02 receives a high level, the single-chip microcomputer interface Y01 outputs a high level, and the inner door fault alarm light 304 is on. If the single-chip microcomputer interface X03 receives a high-level signal, the single-chip microcomputer interface Y02 outputs a high level, and the landing door fault alarm light 305 is on, so as to judge that there is a short-circuit in the elevator door circuit of the simple elevator.

[0088] In a preferred embodiment of the present invention, the simple elevator includes a landing door 401, an inner door 402, a door opening button 403, a feature sticker 404 and a camera 405. The feature sticker 404 is pasted on the inner side of the inner door 402 to facilitate the camera 405 on the top of the simple elevator to collect the information of the feature sticker 404; both the landing door 401 and the inner door 402 of the simple elevator are manually opened and closed.

[0089] The working principle of the present invention is as follows:

[0090] The system is powered on and starts to detect the motor signal of the simple lift. The motor runs normally. The input interface of camera X01 gets a high-level signal, and X02 gets a low-level signal. The camera detects the length of the feature sticker and stores it in register M1. When the detected length of the feature sticker is less than 30% of the total set value, that is, the set value S1 is 30% of the length of the feature sticker, it is determined that the camera is blocked. The simple lift returns to the nearest flat floor area and the motor stops rotating. If the detected length of the feature sticker is greater than the set value S1 at this time, the motor signal is read, the motor runs normally, and the length of the feature sticker is continuously detected and stored in register M1. If the motor stops running, the flat floor switch signal is detected. When it reaches the flat floor area, the simple lift stops in place and starts to detect the door opening button signal. When the door opening button signal is detected, the camera detects the length of the feature sticker and stores it in register M2. At this time, the set value S2 is 0.1. Compare the data L1 in register M1 with the data L2 in register M2. If it meets , the output terminal Y01 of the camera outputs a high level, and the detection signal relay 208 is powered on. If it does not meet , the camera continues to detect the length of the feature sticker and stores it in register M2. When the relay KC is powered on, the door loop detection circuit reads the signals of the inner door switch relay 104 and the landing door relay 109. If the signal of the inner door switch relay 104 is high level, it is determined that the inner door circuit is short-circuited. If the signal of the landing door switch relay 109 is high level, it is determined that the landing door circuit is short-circuited. If the signals of both the inner door relay 104 and the landing door relay 109 are low level, the door loop of the simple lift is not short-circuited.

[0091] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the claims of the present invention. These all fall within the protection scope of the present invention.

Claims

1. A simple lift door circuit detection circuit system, characterized in that, Including a simple elevator, the simple elevator includes a box body, a camera is arranged at the top of the box body, a simple elevator inner door and a simple elevator landing door are respectively arranged on the front of the box body from inside to outside, a characteristic sticker is arranged on the simple elevator inner door and faces the side of the camera, and an opening button is arranged in the middle on the right side of the simple elevator landing door. The detection circuit system detects the following contents: the operation condition of the simple elevator motor, the signal of the opening button, by comparing the length of the characteristic sticker detected by the camera, judging the loop condition by the signals of the landing door loop relay and the inner door loop relay, the safety circuit of the simple elevator, the characteristic sticker length detection circuit and the simple elevator door loop detection circuit; The characteristic sticker length detection circuit includes the following parts: the normally open switch control signal of the simple elevator motor signal is input to the X01 interface of the camera processor. When the motor operates normally, the X01 interface of the camera receives a high level, and the camera collects the length L1 of the characteristic sticker and stores it in the M1 register. If the sticker length L1 in the M1 register is less than the set value S1 at this time, the fault reset relay is energized and closed; when the motor stops operating, the X02 interface of the camera receives a high level, the camera collects the length L2 of the characteristic sticker and stores it in the M2 register. When (L1 - L2) / L1 is greater than the set value S2, the camera interface Y01 outputs a high level, and the detection signal relay is energized and closed; the normally closed switch of the simple elevator motor signal, the flat layer switch set and the opening signal relay switch are connected in series, and the flat layer switch set is composed of multiple flat layer switches connected in parallel.

2. The simple elevator door circuit detection circuit system according to claim 1, wherein The simple elevator door loop includes a simple elevator landing door loop and a simple elevator inner door loop.

3. The simple elevator door circuit detection circuit system according to claim 1, characterized in that, The characteristic sticker is used to facilitate the camera to capture the characteristics of the simple elevator inner door. The characteristic sticker uses an image processing algorithm to obtain a detectable length to realize the signal detection of the opening and closing of the simple elevator door.

4. The simple elevator door circuit detection circuit system according to claim 1, characterized in that The simple elevator door loop detection circuit includes the following parts: the detection signal relay switch is connected to the single-chip microcomputer interface X01, the inner door relay switch is connected to the single-chip microcomputer interface X02, and the landing door relay switch is connected to the single-chip microcomputer interface X03; the single-chip microcomputer interface Y02 is connected to the landing door fault alarm light to output a high level, and the single-chip microcomputer interface Y01 is connected to the inner door fault alarm light to output a high level; the single-chip microcomputer interface Y01 is connected to the inner door fault alarm light, and the single-chip microcomputer interface Y02 is connected to the landing door fault alarm light.

5. The simple elevator door circuit detection circuit system according to claim 4, characterized in that The detection method of the simple elevator door loop detection circuit includes the following steps: S100. Detect the operation condition of the simple elevator motor; S200. Detect the signal of the simple elevator opening button; S300. Compare the length of the characteristic sticker detected by the camera; S400. Detect the signals of the simple elevator landing door loop relay and the simple elevator inner door loop relay, and judge the door loop condition.

6. The simple elevator door circuit detection circuit system according to claim 1, characterized in that, The detection method of the characteristic sticker detection circuit includes the following steps: S201. Detect the simple elevator motor signal; S202. Judge whether the motor stops working; S203. If the motor does not stop working, detect the length of the characteristic sticker once and store it in the register M1; S204. Whether the opening button is pressed; S205. Whether the stored length L1 in M1 is less than the set value S1; S206. Detect the length L2 of the feature sticker and store it in the register M2; S207. Determine whether the camera is blocked, and the elevator runs to the next floor and stops; S208. Calculate (L1 - L2) / L1 and store the calculation result in the register M3; S209. Whether the value in M3 is greater than the set value S2; S210. Detect that the switch is closed.

7. The simple elevator door circuit detection circuit system according to claim 6, characterized in that The safety circuit of the simple elevator includes a simple elevator safety limit circuit composed of a safety switch and a safety switch relay in series, an inner door detection circuit composed of an inner door switch and an inner door switch relay in series, and a landing door detection circuit composed of landing door switches and landing door switch relays on each floor; the main circuit of the safety circuit of the simple elevator is protected by a three-phase circuit breaker, a thermal relay and a phase sequence protection relay in series; the start and stop of the simple elevator motor are controlled by a main power contactor, the upward movement of the simple elevator is controlled by an upward movement contactor, and the downward movement of the simple elevator is controlled by a downward movement contactor; the travel of the simple elevator is controlled by a fire cut-off limiter, the power of the simple elevator is provided by a three-phase asynchronous AC motor, the control terminals of the start, stop, upward movement and downward movement of the simple elevator are completed by the parallel connection of a main power contactor relay, an upward movement contactor relay and a downward movement contactor relay, the start of the simple elevator motor is restricted when the safety switch is disconnected or the landing door or the inner door is opened, the landing door and the inner door of the simple elevator are controlled to open and close by a front door relay, the simple elevator is controlled to reset by a fault reset relay switch, and the safety switch relay switch, the landing door switch relay switch and the inner door switch relay switch are in series.

8. The simple elevator door circuit detection circuit system according to claim 7, characterized in that, The method for detecting the door loop signal of a simple elevator includes the following steps: S301. Detect the detection switch signal; S302. Whether the switch is closed; S303. Read the inner door relay signal and the landing door relay signal of the simple elevator; S304. Whether both the inner door relay and the landing door relay are in a de-energized state; S305. The door loop is normal; S306. Whether the inner door relay of the simple elevator is in a de-energized state; S307. Whether the landing door relay of the simple elevator is in a de-energized state; S308. The landing door loop of the simple elevator is short-circuited, and the landing door fault light is on; S309. The inner door loop of the simple elevator is short-circuited, and the inner door fault light is on; S310. Both the inner door loop and the landing door loop of the simple elevator are short-circuited, and the inner door fault light and the landing door fault light are on.

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