Elevator forced deceleration protection method

Abstract

The present application relates to elevator deceleration protection technical field, disclose a kind of elevator forced deceleration protection method, comprising: obtaining and adjusting the number and installation position of forced deceleration switch;The speed-residual distance protection curve when elevator rated speed deceleration is calculated, and elevator deceleration protection is carried out according to forced deceleration switch detection result and speed-residual distance protection curve;The speed-time protection curve when elevator rated speed deceleration is calculated, and elevator deceleration protection is carried out according to forced deceleration switch detection result and speed-time protection curve;According to residual distance and the installation position, effective situation of forced deceleration switch, fault detection is carried out.The present application is effective after forced deceleration switch signal, according to speed-residual distance protection curve and speed-time protection curve, forced deceleration protection is carried out to elevator, and through forced deceleration switch abnormal fault and skid fault, forced deceleration switch failure condition is detected, to respond to the influence brought by forced deceleration switch failure.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator deceleration protection, and in particular to an elevator forced deceleration protection method. Background Art

[0002] The elevator's forced deceleration switch is a key device in the elevator's safety protection system, used to determine whether the elevator's operating speed and position are normal. When an elevator loses control and rushes toward the bottom or top of the hoistway, the car's door will directly trigger the forced deceleration switch. Once the software detects that the forced deceleration switch is active and detects an abnormal speed, it will control the elevator to slow down and stop at the set deceleration rate, thus preventing the elevator from rushing toward the top or bottom of the pier due to loss of control.

[0003] However, if the existing forced deceleration switch fails, it will be unable to provide terminal protection for abnormally operating elevators. Moreover, when the forced deceleration switch is between the terminal and the elevator, the elevator may not decelerate as instructed or may reaccelerate due to other reasons, and the existing method cannot cope with it. At the same time, as the elevator speed increases, the deceleration distance required by the elevator increases, and the number of forced speed change switches also needs to be increased accordingly, increasing the system material and installation costs. Summary of the Invention

[0004] In order to reduce the cost of the entire elevator and ensure that the elevator terminal station has an effective speed protection function, the present invention provides an elevator forced deceleration protection method. After the forced deceleration switch signal is valid, the elevator is forced to decelerate according to the speed-remaining distance protection curve and the speed-time protection curve. The forced deceleration switch failure is detected through abnormal faults and slippage faults of the forced deceleration switch to cope with the impact of the forced deceleration switch failure.

[0005] The present invention provides an elevator forced deceleration protection method, comprising:

[0006] Obtain and adjust the number and installation positions of forced deceleration switches; wherein a forced deceleration switch includes an upper forced deceleration switch and a lower forced deceleration switch;

[0007] Calculating the speed-remaining distance protection curve when the elevator is decelerated at the rated speed, and performing elevator deceleration protection according to the forced deceleration switch detection result and the speed-remaining distance protection curve;

[0008] Calculating a speed-time protection curve when the elevator is decelerating at rated speed, and performing elevator deceleration protection according to the forced deceleration switch detection result and the speed-time protection curve;

[0009] Fault detection is performed based on the remaining distance and the installation position and effectiveness of the forced deceleration switch; wherein, for forced deceleration protection, the remaining distance is the distance between the elevator and the upper and lower end stations.

[0010] Further, the step of acquiring and adjusting the number and installation position of forced deceleration switches comprises:

[0011] acquiring the number of forced deceleration switches in the elevator shaft, and setting as a first forced deceleration switch, a second forced deceleration switch, …, an Nth forced deceleration switch; wherein N is the number of forced deceleration switches;

[0012] when the number of forced deceleration switches is two, canceling the second forced deceleration switch, and adjusting the installation position of the first forced deceleration switch to the position of the original second forced deceleration switch;

[0013] when the number of forced deceleration switches is three, canceling the third forced deceleration switch, adjusting the installation position of the second forced deceleration switch to the position of the original third forced deceleration switch, and adjusting the installation position of the first forced deceleration switch to the position of the original second forced deceleration switch.

[0014] Further, the step of calculating the speed-residual distance protection curve of the elevator at rated speed and performing elevator deceleration protection according to the detection result of the forced deceleration switch and the speed-residual distance protection curve comprises:

[0015] calculating the speed and its corresponding residual distance of the elevator at rated speed every interval setting time to form the speed-residual distance protection curve;

[0016] when the forced deceleration switch is detected to be effective, taking the real-time speed of the elevator at the set residual distance as a first speed, and taking the speed on the speed-residual distance protection curve at the set residual distance as a second speed;

[0017] when the first speed is greater than the second speed, controlling the elevator to decelerate.

[0018] Further, in the step of calculating the speed and its corresponding residual distance of the elevator at rated speed every interval setting time to form the speed-residual distance protection curve, the calculation formula of the speed and the residual distance is:

[0019] dividing the time of decelerating the elevator from the maximum speed to the minimum speed into three segments;

[0020] the first segment:

[0021]

[0022] the second segment:

[0023] V t = V2-a max t5

[0024]

[0025] Paragraph 3:

[0026]

[0027] Among them, V t is the speed when the remaining distance is S, a max is the maximum deceleration of the elevator, J2 is the jerk of the first section, J1 is the jerk of the third section, V2 is the speed at the end of the first section, that is, the beginning of the second section, and V1 is the speed at the end of the second section, that is, the beginning of the third section.

[0028] Furthermore, the step of calculating the speed-time protection curve when the elevator is decelerated at the rated speed, and performing elevator deceleration protection according to the forced deceleration switch detection result and the speed-time protection curve, includes:

[0029] Calculate the speed of the elevator when it decelerates from rated speed at every set time interval and record the corresponding time point to form a speed-time protection curve;

[0030] When it is detected that the forced deceleration switch is valid, the real-time speed of the elevator at the set time point is used as the third speed, and the speed on the speed-time protection curve at the set time point is used as the fourth speed;

[0031] When the third speed is greater than the sum of the fourth speed and the protection threshold, the elevator is controlled to decelerate.

[0032] Furthermore, in the step of calculating the speed of the elevator when the rated speed is decelerated at each set time interval and recording the corresponding time point to form a speed-time protection curve, the calculation formula of speed and time is:

[0033] The time it takes for the elevator to decelerate from maximum speed to minimum speed is divided into three sections;

[0034] First paragraph:

[0035]

[0036] Second paragraph:

[0037] V t =V2-a max t5

[0038] Paragraph 3:

[0039]

[0040] Among them, V t is the speed at the corresponding time points t4, t5, and t6, a maxis the maximum deceleration of the elevator, J2 is the jerk of the first section, J1 is the jerk of the third section, V2 is the speed at the end of the first section, that is, the beginning of the second section, and V1 is the speed at the end of the second section, that is, the beginning of the third section.

[0041] Furthermore, the step of performing fault detection based on the remaining distance and the installation position and effectiveness of the forced deceleration switch includes:

[0042] When the remaining distance of the elevator reaches a set position, if the forced deceleration switch signal is not detected, it is determined that the forced deceleration switch is abnormal; wherein the set position is the position of the forced deceleration switch installation position ± a preset abnormality detection threshold;

[0043] When the forced deceleration switch is detected to be effective, the distance between the remaining distance position and the installation position of the forced deceleration switch during the detection is used as the target distance;

[0044] When the target distance is not within a fault detection threshold range, it is determined to be a position slip fault; wherein the fault detection threshold range is preset according to the design.

[0045] The present invention also provides an elevator forced deceleration protection device, comprising:

[0046] An acquisition module is used to acquire and adjust the number and installation position of the forced deceleration switches; wherein a forced deceleration switch includes an upper forced deceleration switch and a lower forced deceleration switch;

[0047] a first calculation module, configured to calculate a speed-remaining distance protection curve when the elevator is decelerated from the rated speed, and perform elevator deceleration protection according to the forced deceleration switch detection result and the speed-remaining distance protection curve;

[0048] The second calculation module is used to calculate the speed-time protection curve when the elevator is decelerated at the rated speed, and perform elevator deceleration protection according to the forced deceleration switch detection result and the speed-time protection curve;

[0049] The detection module is used to perform fault detection according to the remaining distance and the installation position and effectiveness of the forced deceleration switch; wherein, for the forced deceleration protection, the remaining distance is the distance between the elevator and the upper and lower end stations.

[0050] The present invention also provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0051] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0052] The beneficial effects of the present invention are:

[0053] The present invention obtains and adjusts the number and installation positions of forced deceleration switches, calculates the speed-remaining distance protection curve and the speed-time protection curve when the elevator is decelerating at the rated elevator speed, and performs forced deceleration protection on the elevator based on the two protection curves of the forced deceleration switch detection results. Furthermore, the present invention detects forced deceleration switch failures through abnormal and slippage faults of the forced deceleration switches to address the impact of forced deceleration switch failures. This can reduce the cost of the entire elevator while ensuring that the elevator terminal station has an effective speed protection function. Furthermore, when equipped with two or more forced deceleration switches, a pair of forced deceleration switches (one on the upper and one on the lower) can be eliminated, effectively reducing material and installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 Schematic diagram of a method flow according to an embodiment of the present invention.

[0055] Figure 2 Schematic diagram of a speed-remaining distance protection curve according to an embodiment of the present invention.

[0056] Figure 3 Schematic diagram of a speed and remaining distance calculation curve according to an embodiment of the present invention.

[0057] Figure 4 FIG. 4 is a schematic diagram of a speed-time protection curve according to an embodiment of the present invention.

[0058] Figure 5 Schematic diagram of abnormality detection of a forced deceleration switch according to an embodiment of the present invention.

[0059] Figure 6 Schematic diagram of slip fault detection according to an embodiment of the present invention.

[0060] Figure 7 FIG. 1 is a schematic diagram of the device structure according to an embodiment of the present invention.

[0061] Figure 8 Schematic diagram of the internal structure of a computer device according to an embodiment of the present invention.

[0062] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0063] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0064] like Figure 1 As shown, the present invention provides an elevator forced deceleration protection method, comprising:

[0065] S1. Obtain and adjust the number and installation positions of the forced deceleration switches; wherein a forced deceleration switch includes an upper forced deceleration switch and a lower forced deceleration switch;

[0066] In one embodiment, the number of forced deceleration switches in the elevator shaft is obtained and set as a level 1 forced deceleration switch, a level 2 forced deceleration switch, ..., N level forced deceleration switches, where N is the number of forced deceleration switches. For example, an elevator with a specification of 60 m / min is set with one forced deceleration switch; elevators with specifications of 90 m / min, 105 m / min, and 120 m / min are set with two forced deceleration switches, namely, a level 1 forced deceleration switch and a level 2 forced deceleration switch; and an elevator with a specification of 150 m / min is set with three forced deceleration switches, namely, a level 1 forced deceleration switch, a level 2 forced deceleration switch, and a level 3 forced deceleration switch. 60 m / min, 90 m / min, 105 m / min, 120 m / min, and 150 m / min represent the elevator speeds, where 90 m / min corresponds to 90 m / 60 s = 1.5 m / s, and 120 m / min corresponds to 120 m / 60 s = 2 m / s.

[0067] Adjustments to the forced deceleration switch include:

[0068] When there are two forced deceleration switches, the second-level forced deceleration switch is removed, and the installation position of the first-level forced deceleration switch is adjusted to the original second-level forced deceleration switch position. For example, for the 90M / MIN to 120M / MIN specifications, SDS(U2) and SDS(D2) are removed, and the installation distance between SDS(U1) and SDS(D1) and the terminal is adjusted to the original installation distance between SDS(U2) and SDS(D2). SDS represents the forced deceleration switch, U represents the upper forced deceleration switch, and D represents the lower forced deceleration switch. 1 / 2 / 3 indicates the level of the forced deceleration switch. For example, SDS(U2) represents the upper second-level forced deceleration switch.

[0069] When there are three forced deceleration switches, the 3-level forced deceleration switch is cancelled, and the installation position of the 2-level forced deceleration switch is adjusted to the original position of the 3-level forced deceleration switch, and the installation position of the 1-level forced deceleration switch is adjusted to the original position of the 2-level forced deceleration switch. For example, in the 150M / MIN specification, SDS (U3) and SDS (D3) are cancelled, and the installation distance of SDS (U1) and SDS (D1) from the terminal station is adjusted to the installation distance of SDS (U2) and SDS (D2), and the installation distance of SDS (U2) and SDS (D2) from the terminal station is adjusted to the installation distance of SDS (U3) and SDS (D3). The installation positions of the hoistway dimensions of the old scheme and the installation positions of the hoistway dimensions of the new scheme are shown in Tables 1 and 2 below.

[0070] Table 1 Old scheme hoistway dimensions and installation positions

[0071]

[0072]

[0073] Table 2 New scheme shaft size installation position

[0074]

[0075] As shown in Table 1 and Table 2 above, the old scheme includes SDS(U3), SDS(D3), SDS(U2), SDS(D2), SDS(U1), SDS(D1).

[0076] The new scheme cancels SDS(U3) / SDS(D3) at 150M / MIN, installs SDS(U2) / SDS(D2) switch to the position of the old scheme SDS(U3) / SDS(D3), and installs SDS(U1) / SDS(D1) switch to the position of the old scheme SDS(U2) / SDS(D2); cancels SDS(U2) / SDS(D2) at 90M / MIN~120M / MIN, and installs SDS(U1) / SDS(D1) switch to the position of the old scheme SDS(U2) / SDS(D2).

[0077] S2, calculate the speed-residual distance protection curve of the elevator rated speed deceleration, and perform elevator deceleration protection according to the forced deceleration switch detection result and the speed-residual distance protection curve.

[0078] In one embodiment, step S2 specifically includes:

[0079] S201, calculate the speed and its corresponding residual distance of the elevator rated speed deceleration every interval setting time, and form a speed-residual distance protection curve;

[0080] S202, when the forced deceleration switch is detected to be valid, take the real-time speed of the elevator at the setting residual distance as the first speed, and take the speed on the speed-residual distance protection curve at the setting residual distance as the second speed;

[0081] S203, when the first speed is greater than the second speed, control the elevator to decelerate. That is, as shown in the figure, when the forced deceleration switch is valid, the residual distance speed protection function starts to work, and when the speed at a certain residual distance point in the elevator operation is greater than the corresponding point on the speed-residual distance protection curve, the elevator is controlled to decelerate for end station protection. Figure 2

[0082] ​In one embodiment, when comparison is required, the theoretical speed on the speed-remaining distance protection curve can be calculated in real time according to the ladder speed, that is, the speed-remaining distance protection curve is not calculated in advance, but the theoretical speed is calculated in real time when used.

[0083] In one embodiment, the speed and remaining distance are calculated according to the variable deceleration linear motion mode, and the calculation formula is:

[0084] The time it takes for the elevator to decelerate from maximum speed to minimum speed is divided into three sections, namely Figure 3 As shown, it is divided into T4 segment, T5 segment, and T6 segment;

[0085] T4 segment:

[0086]

[0087] T5 segment:

[0088] V t =V2-a max t5

[0089]

[0090] T6 segment:

[0091]

[0092] Among them, V t is the speed when the remaining distance is S, a max is the maximum deceleration of the elevator, J2 is the acceleration of the T4 segment (deceleration a max deceleration), J1 is the acceleration of T6 segment (deceleration a max deceleration), V1 and V2 are the inflection point speeds, that is, V2 is the speed at the end of T4 segment, that is, the beginning of T5 segment, and V1 is the speed at the end of T5 segment, that is, the beginning of T6 segment.

[0093] S3. Calculate the speed-time protection curve when the elevator is decelerating at the rated speed, and perform elevator deceleration protection according to the forced deceleration switch detection result and the speed-time protection curve.

[0094] In one embodiment, step S3 specifically includes:

[0095] S301. Calculate the speed of the elevator when it decelerates from the rated speed at each set time interval and record the corresponding time points to form a speed-time protection curve;

[0096] S302, when it is detected that the forced deceleration switch is valid, the real-time speed of the elevator at the set time point is used as the third speed, and the speed on the speed-time protection curve at the set time point is used as the fourth speed;

[0097] S303: When the third speed is greater than the sum of the fourth speed and the protection threshold, the elevator is controlled to decelerate. Figure 4 As shown, the speed-time protection curve for the elevator's rated speed is calculated. When the forced deceleration switch is enabled, the time-speed protection function takes effect. When the speed at a certain point in time during elevator operation exceeds the protection threshold of the speed-time protection curve, deceleration protection is activated. For example, based on the theoretical deceleration curve, a set protection threshold, such as 5 mph, can be added. This means that at each point in time, the elevator's actual speed exceeds the theoretical speed + 5 mph.

[0098] In one embodiment, the speed and time are calculated according to the variable deceleration linear motion mode, and the calculation formula is:

[0099] The time it takes for the elevator to decelerate from maximum speed to minimum speed is divided into three sections, namely Figure 3 As shown, it is divided into T4 segment, T5 segment, and T6 segment;

[0100] T4 segment:

[0101]

[0102] T5 segment:

[0103] V t =V2-a max t5

[0104] T6 segment:

[0105]

[0106] Among them, V t is the speed at the corresponding time points t4, t5, and t6, a max is the maximum deceleration of the elevator, J2 is the acceleration of the T4 segment (deceleration a max deceleration), J1 is the acceleration of T6 segment (deceleration a max deceleration), V1 and V2 are the inflection point speeds, that is, V2 is the speed at the end of T4 segment, that is, the beginning of T5 segment, and V1 is the speed at the end of T5 segment, that is, the beginning of T6 segment.

[0107] S4. Perform fault detection based on the remaining distance and the installation position and effectiveness of the forced deceleration switch; wherein, for forced deceleration protection, the remaining distance is the distance between the elevator and the upper and lower end stations.

[0108] In one embodiment, step S4 specifically includes:

[0109] S401. When the remaining distance of the elevator reaches a set position, if the forced deceleration switch signal is not detected, it is determined that the forced deceleration switch is abnormal; wherein the set position is the position of the forced deceleration switch installation position ± a preset abnormality detection threshold.

[0110] That is, Figure 5 As shown, when the remaining distance reaches the SDS installation position ± the preset abnormality detection threshold, the forced deceleration switch abnormality detection is triggered. If no forced deceleration switch signal is detected, the forced deceleration switch is considered faulty. For example, the SDS installation position is the installation location of the forced deceleration switch. The forced deceleration switch installation position ± the preset abnormality detection threshold indicates that the preset abnormality detection threshold is increased or decreased based on the actual SDS installation position to detect the SDS switch signal. Taking the new solution hoistway installation dimensions in Table 2 as an example, SDS1 is 600 cm. If the preset abnormality detection threshold is 100 cm, and the elevator is descending, if the SDS1 switch signal is still not detected when the remaining distance is less than (600 - 100) cm, the SDS1 switch is considered faulty.

[0111] S402: When it is detected that the forced deceleration switch is valid, the distance between the remaining distance position and the installation position of the forced deceleration switch during the detection is used as the target distance;

[0112] S403: When the target distance is not within a fault detection threshold range, determine that a position slip fault occurs; wherein the fault detection threshold range is a preset distance.

[0113] That is, Figure 6 As shown in the figure, if the remaining distance to the forced deceleration switch installation location is outside the fault detection threshold range after the forced deceleration switch signal is activated, a slip fault is detected. For example, in a 90 m / min elevator, when the forced deceleration switch is activated, the actual remaining distance should be 1400 mm. If the preset distance is set to 200 mm, the fault detection threshold range is [1200 mm, 1600 mm]. That is, when the forced deceleration switch is activated and the remaining distance is greater than 1600 mm or less than 1200 mm, a slip fault is detected.

[0114] The present invention obtains and adjusts the number and installation positions of forced deceleration switches, calculates the speed-remaining distance protection curve and the speed-time protection curve for the elevator's rated speed during deceleration, and provides forced deceleration protection for the elevator based on the two protection curves based on the forced deceleration switch detection results. Furthermore, the present invention detects forced deceleration switch failures through abnormal and slippage faults of the forced deceleration switches to address the impact of forced deceleration switch failure. This can reduce the cost of the entire elevator while ensuring that the elevator terminal station has an effective speed protection function. Furthermore, when equipped with two or more forced deceleration switches, a pair of forced deceleration switches (one each at the top and bottom) can be eliminated, effectively reducing material and installation costs.

[0115] like Figure 7 As shown, the present invention also provides an elevator forced deceleration protection device, comprising:

[0116] Acquisition module 1, used to acquire and adjust the number and installation position of the forced deceleration switches; wherein a forced deceleration switch includes an upper forced deceleration switch and a lower forced deceleration switch;

[0117] The first calculation module 2 is used to calculate the speed-remaining distance protection curve when the elevator is decelerated from the rated elevator speed, and perform elevator deceleration protection according to the forced deceleration switch detection result and the speed-remaining distance protection curve;

[0118] The second calculation module 3 is used to calculate the speed-time protection curve when the elevator is decelerated at the rated speed, and perform elevator deceleration protection according to the forced deceleration switch detection result and the speed-time protection curve;

[0119] The detection module 4 is used to perform fault detection according to the remaining distance and the installation position and effectiveness of the forced deceleration switch; wherein, for the forced deceleration protection, the remaining distance is the distance between the elevator and the upper and lower end stations.

[0120] In one embodiment, the acquisition module 1 includes:

[0121] an acquiring unit, configured to acquire the number of forced deceleration switches in the elevator shaft and set the number of forced deceleration switches to level 1, level 2, ..., and level N, wherein N is the number of forced deceleration switches;

[0122] The first adjustment unit is configured to cancel the level 2 forced deceleration switch when there are two forced deceleration switches, and adjust the installation position of the level 1 forced deceleration switch to the original position of the level 2 forced deceleration switch;

[0123] The second adjustment unit is used to cancel the 3-level forced deceleration switch when there are three forced deceleration switches, adjust the installation position of the 2-level forced deceleration switch to the original position of the 3-level forced deceleration switch, and adjust the installation position of the 1-level forced deceleration switch to the original position of the 2-level forced deceleration switch.

[0124] In one embodiment, the first calculation module 2 includes:

[0125] The first calculation unit is used to calculate the speed of the elevator when it is decelerated from the rated speed and the corresponding remaining distance at each set time interval to form a speed-remaining distance protection curve;

[0126] a first setting unit, configured to, when detecting that the forced deceleration switch is valid, set the real-time speed of the elevator at the remaining distance as the first speed, and set the speed on the speed-remaining distance protection curve at the remaining distance as the second speed;

[0127] The first control unit is configured to control the elevator to decelerate when the first speed is greater than the second speed.

[0128] In one embodiment, in the first calculation unit, the calculation formula for speed and remaining distance is:

[0129] The time it takes for the elevator to decelerate from maximum speed to minimum speed is divided into three sections;

[0130] First paragraph:

[0131]

[0132] Second paragraph:

[0133] V t =V2-a max t5

[0134]

[0135] Paragraph 3:

[0136]

[0137] Among them, V t is the speed when the remaining distance is S, a max is the maximum deceleration of the elevator, J2 is the jerk of the first section, J1 is the jerk of the third section, V2 is the speed at the end of the first section, that is, the beginning of the second section, and V1 is the speed at the end of the second section, that is, the beginning of the third section.

[0138] In one embodiment, the second calculation module 3 includes:

[0139] The second calculation unit is used to calculate the speed of the elevator when it is decelerated from the rated speed at each set time interval and record the corresponding time point to form a speed-time protection curve;

[0140] a second setting unit, configured to, when detecting that the forced deceleration switch is valid, set the real-time speed of the elevator at a set time point as the third speed and set the speed on the speed-time protection curve at the set time point as the fourth speed;

[0141] The second control unit is configured to control the elevator to decelerate when the third speed is greater than the sum of the fourth speed and a protection threshold.

[0142] In one embodiment, in the second calculation unit, the calculation formula for speed and time is:

[0143] The time it takes for the elevator to decelerate from maximum speed to minimum speed is divided into three sections;

[0144] First paragraph:

[0145]

[0146] Second paragraph:

[0147] V t =V2-a max t5

[0148] Paragraph 3:

[0149]

[0150] Among them, V t is the speed at the corresponding time points t4, t5, and t6, a max is the maximum deceleration of the elevator, J2 is the jerk of the first section, J1 is the jerk of the third section, V2 is the speed at the end of the first section, that is, the beginning of the second section, and V1 is the speed at the end of the second section, that is, the beginning of the third section.

[0151] In one embodiment, the detection module 4 includes:

[0152] an abnormality detection unit, configured to determine that the forced deceleration switch is abnormal if the forced deceleration switch signal is not detected when the remaining distance of the elevator reaches a set position; wherein the set position is a position of the forced deceleration switch installation position ± a preset abnormality detection threshold;

[0153] a third setting unit, configured to, when detecting that the forced deceleration switch is valid, use the distance between the remaining distance position and the installation position of the forced deceleration switch during the detection as a target distance;

[0154] The slip detection unit is used to determine a slip fault when the target distance is not within a fault detection threshold range; wherein the fault detection threshold range is preset according to the design.

[0155] The above modules and units are used to execute the corresponding steps in the above elevator forced deceleration protection method. The specific implementation method thereof is described in the above method embodiment and will not be repeated here.

[0156] like Figure 8 As shown, the present invention also provides a computer device, which can be a server, and its internal structure can be as follows Figure 8 As shown. The computer device includes a processor, memory, a network interface, and a database connected via a system bus. The processor of the computer is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store all data required for the process of the elevator forced deceleration protection method. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, the elevator forced deceleration protection method is implemented.

[0157] Those skilled in the art will understand that Figure 8 The structure shown in is merely a block diagram of a portion of the structure related to the present application solution and does not constitute a limitation on the computer device to which the present application solution is applied.

[0158] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, any one of the above-mentioned elevator forced deceleration protection methods is implemented.

[0159] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media provided in this application and used in the embodiments may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAMbus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM).

[0160] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, apparatus, article, or method comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, apparatus, article, or method. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, apparatus, article, or method comprising the element.

[0161] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An elevator forced deceleration protection method, characterized in that: include: Obtain and adjust the number and installation positions of the forced deceleration switches; wherein a forced deceleration switch includes an upper forced deceleration switch and a lower forced deceleration switch; specifically, including: Obtain the number of forced deceleration switches in the elevator shaft and set them to level 1 forced deceleration switch, level 2 forced deceleration switch, ..., level N forced deceleration switch; where N is the number of forced deceleration switches; When there are two forced deceleration switches, the level 2 forced deceleration switch is cancelled, and the installation position of the level 1 forced deceleration switch is adjusted to the position of the original level 2 forced deceleration switch; When there are three forced deceleration switches, the 3-level forced deceleration switch is cancelled, and the installation position of the 2-level forced deceleration switch is adjusted to the position of the original 3-level forced deceleration switch, and the installation position of the 1-level forced deceleration switch is adjusted to the position of the original 2-level forced deceleration switch; Calculating the speed-remaining distance protection curve when the elevator is decelerated at the rated speed, and performing elevator deceleration protection according to the forced deceleration switch detection result and the speed-remaining distance protection curve; Calculating a speed-time protection curve when the elevator is decelerating at rated speed, and performing elevator deceleration protection according to the forced deceleration switch detection result and the speed-time protection curve; Fault detection is performed based on the remaining distance and the installation position and effectiveness of the forced deceleration switch; wherein, for forced deceleration protection, the remaining distance is the distance between the elevator and the upper and lower end stations.

2. The elevator forced deceleration protection method according to claim 1, characterized in that: The step of calculating the speed-remaining distance protection curve when the elevator is decelerated at the rated speed, and performing elevator deceleration protection according to the forced deceleration switch detection result and the speed-remaining distance protection curve, comprises: The speed and the corresponding remaining distance of the elevator when it decelerates from rated speed are calculated at every set time interval to form a speed-remaining distance protection curve; When it is detected that the forced deceleration switch is valid, the real-time speed of the elevator at the set remaining distance is used as the first speed, and the speed on the speed-remaining distance protection curve at the set remaining distance is used as the second speed; When the first speed is greater than the second speed, the elevator is controlled to decelerate.

3. The elevator forced deceleration protection method according to claim 2, characterized in that: In the step of calculating the speed of the elevator when decelerating from the rated speed and the corresponding remaining distance at each set time interval to form a speed-remaining distance protection curve, the calculation formulas for the speed and remaining distance are: The time it takes for the elevator to decelerate from maximum speed to minimum speed is divided into three sections; First paragraph: Second paragraph: Paragraph 3: in, The remaining distance is The speed of is the maximum deceleration of the elevator, is the jerk of the first segment, is the jerk of the third segment, is the speed at the end of the first segment, i.e. the beginning of the second segment, The speed at the end of the second segment, which is the beginning of the third segment.

4. The elevator forced deceleration protection method according to claim 1, characterized in that: The step of calculating the speed-time protection curve when the elevator is decelerated at the rated speed, and performing elevator deceleration protection according to the forced deceleration switch detection result and the speed-time protection curve, comprises: Calculate the speed of the elevator when it decelerates from rated speed at every set time interval and record the corresponding time points to form a speed-time protection curve; When it is detected that the forced deceleration switch is valid, the real-time speed of the elevator at the set time point is used as the third speed, and the speed on the speed-time protection curve at the set time point is used as the fourth speed; When the third speed is greater than the sum of the fourth speed and the protection threshold, the elevator is controlled to decelerate.

5. The elevator forced deceleration protection method according to claim 4, characterized in that: In the step of calculating the speed of the elevator when the rated speed is decelerated at each set time interval and recording the corresponding time points to form a speed-time protection curve, the calculation formula for speed and time is: The time it takes for the elevator to decelerate from maximum speed to minimum speed is divided into three sections; First paragraph: Second paragraph: Paragraph 3: in, For the corresponding time point speed, is the maximum deceleration of the elevator, is the first segment jerk, is the third-stage jerk, is the speed at the end of the first segment, i.e. the beginning of the second segment, The speed at the end of the second segment, which is the beginning of the third segment.

6. The elevator forced deceleration protection method according to claim 3, characterized in that: The step of performing fault detection based on the remaining distance and the installation position and effectiveness of the forced deceleration switch includes: When the remaining distance of the elevator reaches a set position, if the forced deceleration switch signal is not detected, it is determined that the forced deceleration switch is abnormal; wherein the set position is the position of the forced deceleration switch installation position ± a preset abnormality detection threshold; When the forced deceleration switch is detected to be effective, the distance between the remaining distance position and the installation position of the forced deceleration switch during the detection is used as the target distance; When the target distance is not within a fault detection threshold range, it is determined to be a position slip fault; wherein the fault detection threshold range is preset according to the design.

7. An elevator forced deceleration protection device, characterized in that: include: The acquisition module is used to acquire and adjust the number and installation position of the forced deceleration switches; wherein a forced deceleration switch includes an upper forced deceleration switch and a lower forced deceleration switch; specifically, it includes: an acquiring unit, configured to acquire the number of forced deceleration switches in the elevator shaft and set the number of forced deceleration switches to level 1, level 2, ..., and level N, wherein N is the number of forced deceleration switches; The first adjustment unit is configured to cancel the level 2 forced deceleration switch when there are two forced deceleration switches, and adjust the installation position of the level 1 forced deceleration switch to the original position of the level 2 forced deceleration switch; a second adjustment unit configured to, when there are three forced deceleration switches, cancel the 3-level forced deceleration switch, adjust the installation position of the 2-level forced deceleration switch to the original position of the 3-level forced deceleration switch, and adjust the installation position of the 1-level forced deceleration switch to the original position of the 2-level forced deceleration switch; a first calculation module, configured to calculate a speed-remaining distance protection curve when the elevator is decelerated from the rated speed, and perform elevator deceleration protection according to the forced deceleration switch detection result and the speed-remaining distance protection curve; The second calculation module is used to calculate the speed-time protection curve when the elevator is decelerated at the rated speed, and perform elevator deceleration protection according to the forced deceleration switch detection result and the speed-time protection curve; The detection module is used to perform fault detection according to the remaining distance and the installation position and effectiveness of the forced deceleration switch; wherein, for the forced deceleration protection, the remaining distance is the distance between the elevator and the upper and lower end stations.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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