Forced deceleration protection method for elevator

Abstract

The invention relates to the technical field of elevator deceleration protection, and discloses an elevator forced deceleration protection method which comprises the following steps: acquiring and adjusting the number and mounting positions of forced deceleration switches; calculating a speed-residual distance protection curve when the elevator is decelerated at the rated elevator speed, and performing elevator deceleration protection according to the detection result of the forced deceleration switch and the speed-residual distance protection curve; calculating a speed-time protection curve when the elevator is decelerated at the rated elevator speed, and performing elevator deceleration protection according to the detection result of the forced deceleration switch and the speed-time protection curve; and fault detection is carried out according to the residual distance, the installation position of the forced deceleration switch and the effective condition. After the forced deceleration switch signal is valid, forced deceleration protection is performed on the elevator according to the speed-residual distance protection curve and the speed-time protection curve, and the failure condition of the forced deceleration switch is detected according to the abnormal fault and the slip fault of the forced deceleration switch so as to deal with the influence caused by the failure of the forced deceleration switch.

Description

Technical Field

[0001] The 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 forced deceleration switch is a key device in the elevator safety protection system, which is used to determine whether the elevator's operating speed and position are normal. When the elevator rushes to the bottom or top of the shaft due to loss of control, the car board will directly touch the forced deceleration switch. After the software detects that the forced deceleration switch is effective, if an abnormal speed is detected, the elevator will be controlled to decelerate and stop at the set deceleration, thereby preventing the elevator from rushing to the top or bottom of the pier due to loss of control.

[0003] However, when the existing forced deceleration switch fails, it is impossible to provide terminal protection for the abnormally operating elevator; and when the forced deceleration switch is between the terminal and the terminal, the elevator fails to decelerate as instructed or reaccelerates 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 failure of the forced deceleration switch is detected through abnormal faults and slippage faults of the forced deceleration switch to cope with the impact of the failure of the forced deceleration switch.

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

[0006] Obtain 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;

[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] 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;

[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] Furthermore, the step of obtaining and adjusting the number and installation positions of the forced deceleration switches includes:

[0011] Obtain the number of forced deceleration switches in the elevator shaft, and set them to be level 1 forced deceleration switches, level 2 forced deceleration switches, ..., level N forced deceleration switches; wherein N is the number of forced deceleration switches;

[0012] When there are two forced deceleration switches, the 2nd-level forced deceleration switch is cancelled, and the installation position of the 1st-level forced deceleration switch is adjusted to the position of the original 2nd-level forced deceleration switch;

[0013] When the number of the forced deceleration switches is three, 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.

[0014] Furthermore, 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 includes:

[0015] The speed and the corresponding remaining distance of the elevator when it is decelerated from rated speed are calculated at each set time interval to form a speed-remaining distance protection curve;

[0016] When it is detected that the forced deceleration switch is effective, the real-time speed of the elevator at the set remaining distance is used as the first speed, and the speed on the speed at the set remaining distance-remaining distance protection curve is used as the second speed;

[0017] When the first speed is greater than the second speed, the elevator is controlled to decelerate.

[0018] Furthermore, in the step of calculating the speed of the elevator when the rated speed is decelerated and the corresponding remaining distance at each set interval to form a speed-remaining distance protection curve, the calculation formula of the speed and the remaining distance is:

[0019] The time it takes for the elevator to decelerate from maximum speed to minimum speed is divided into three sections;

[0020] First paragraph:

[0021]

[0022] Second paragraph:

[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, i.e. the beginning of the second section, and V1 is the speed at the end of the second section, i.e. 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 effective, 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, i.e. the beginning of the second section, and V1 is the speed at the end of the second section, i.e. the beginning of the third section.

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

[0042] When the remaining distance of the elevator reaches the 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 ± the 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 the 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] The first calculation module is used to calculate the speed-remaining distance protection curve when the elevator is decelerated at the rated elevator 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 on which a computer program is stored, and 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 position of the forced deceleration switches, calculates the speed-remaining distance protection curve when the elevator is decelerated at the rated speed and the speed-time protection curve when the elevator is decelerated at the rated speed, and performs forced deceleration protection on the elevator according to the two protection curves of the forced deceleration switch detection results, and detects the failure of the forced deceleration switch through abnormal faults and slippage faults of the forced deceleration switch to cope with the impact of the failure of the forced deceleration switch. It can reduce the cost of the entire elevator, while ensuring that the elevator terminal station has an effective speed protection function. At the same time, when there are 2 or more forced deceleration switches, a pair of forced deceleration switches (one each at the upper and lower levels) can be cancelled, effectively reducing material costs and installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 The figure is a 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 Schematic diagram of a speed-time protection curve according to an embodiment of the present invention.

[0058] Figure 5 Schematic diagram of abnormal 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 a device structure according to an embodiment of the present invention.

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

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

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

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

[0065] S1, obtaining and adjusting 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 1-level forced deceleration switch, a 2-level forced deceleration switch, ..., an N-level forced deceleration switch, where N is the number of forced deceleration switches; for example, an elevator with a specification of 60M / MIN is set with one forced deceleration switch; an elevator with specifications of 90M / MIN, 105M / MIN, and 120M / MIN is set with two forced deceleration switches, namely a 1-level forced deceleration switch and a 2-level forced deceleration switch; an elevator with a specification of 150M / MIN is set with three forced deceleration switches, namely a 1-level forced deceleration switch, a 2-level forced deceleration switch, and a 3-level forced deceleration switch, 60M / MIN, 90M / MIN, 105M / MIN, 120M / MIN, and 150M / MIN represent elevator speeds, wherein 90M / MIN corresponds to 90M / 60S=1.5M / S, and 120M / MIN corresponds to 120M / 60S=2M / S.

[0067] Adjustments to the forced deceleration switch include:

[0068] When there are two forced deceleration switches, the 2nd level forced deceleration switch is cancelled, and the installation position of the 1st level forced deceleration switch is adjusted to the original 2nd level forced deceleration switch position. For example, the 90M / MIN~120M / MIN specification cancels SDS(U2) and SDS(D2), and the installation distance of SDS(U1) and SDS(D1) from the terminal station is adjusted to the installation distance of the original SDS(U2) and SDS(D2). SDS represents the forced deceleration switch, U represents the upper forced deceleration switch, D represents the lower forced deceleration switch, and 1 / 2 / 3 represents the level of the forced deceleration switch, for example: SDS(U2) represents the upper second level forced deceleration switch.

[0069] When the number of the forced deceleration switches is three, 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, the 150M / MIN specification cancels SDS (U3) and SDS (D3), and the installation distance of SDS (U1) and SDS (D1) from the terminal station is adjusted to the original 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 original installation distance of SDS (U3) and SDS (D3). The installation position of the hoistway size of the old scheme and the installation position of the hoistway size 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 hoistway dimensions and installation positions

[0074]

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

[0076] In the new plan, SDS (U3) / SDS (D3) is cancelled at 150M / MIN, and the SDS (U2) / SDS (D2) switch is installed at the position of SDS (U3) / SDS (D3) in the old plan, and the SDS (U1) / SDS (D1) switch is installed at the position of SDS (U2) / SDS (D2) in the old plan; in the new plan, SDS (U2) / SDS (D2) is cancelled at 90M / MIN~120M / MIN, and the SDS (U1) / SDS (D1) switch is installed at the position of SDS (U2) / SDS (D2) in the old plan.

[0077] S2. Calculate the speed-remaining distance 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-remaining distance protection curve.

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

[0079] S201, calculating the speed of the elevator when it is decelerating from rated speed and its corresponding remaining distance at each set time interval, and forming a speed-remaining distance protection curve;

[0080] S202, when it is detected that the forced deceleration switch is effective, the real-time speed of the elevator at the set remaining distance is used as the first speed, and the speed on the speed at the set remaining distance-remaining distance protection curve is used as the second speed;

[0081] S203: When the first speed is greater than the second speed, control the elevator to decelerate. Figure 2 As shown in the figure, when the forced deceleration switch is effective, the remaining distance speed protection function starts to work. When the speed at a certain remaining distance point during the elevator operation is greater than the corresponding point of the speed-remaining distance protection curve, the elevator is controlled to decelerate for terminal protection.

[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 the 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 turning 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 decelerated at 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, 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;

[0096] S302, when it is detected that the forced deceleration switch is effective, 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 in the figure, the speed-time protection curve of the rated elevator speed is calculated. When the forced deceleration switch is effective, the time-speed protection function starts to work. When the speed at a certain time point during the operation of the elevator is greater than the protection threshold of the speed-time protection curve, deceleration protection is performed. For example, on the basis of the theoretical deceleration curve, a set protection threshold is added, such as 5M / MIN, that is, when the actual speed of the elevator is greater than the theoretical speed + 5M / MIN at each time point, the elevator is decelerated for protection.

[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 turning 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 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.

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

[0109] S401. When the remaining distance of the elevator reaches the 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 installation position of the forced deceleration switch ± the position of the preset abnormality detection threshold.

[0110] That is, Figure 5 As shown, when the remaining distance reaches the position of the SDS installation position ± the preset abnormal detection threshold, the forced deceleration switch abnormal detection is triggered. If the forced deceleration switch signal is not detected, the forced deceleration switch abnormal fault is set. For example, the SDS installation position is the installation position of the forced deceleration switch, and the position of the forced deceleration switch installation position ± the preset abnormal detection threshold indicates that the preset abnormal detection threshold is increased or decreased on the basis of the actual SDS installation position to detect the SDS switch signal; taking the hoistway installation size of the new scheme in Table 2 as an example, SDS1 is 600, if the preset abnormal detection threshold is 100 cm, and the elevator goes down, if the SDS1 switch signal is still not detected when the remaining distance is < (600-100) cm, it is considered that the SDS1 switch is abnormally faulty.

[0111] S402, when it is detected that the forced deceleration switch is effective, taking the distance between the remaining distance position and the installation position of the forced deceleration switch during the detection as the target distance;

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

[0113] That is, Figure 6 As shown in the figure, after the forced deceleration switch signal is valid, the remaining distance and the distance from the installation position of the forced deceleration switch are not within the fault detection threshold range, and the slip fault is determined. For example, taking the 90M / MIN elevator speed as an example, when the forced deceleration switch is valid, the actual remaining distance should be 1400mm, and the preset distance is set to 200mm, then the fault detection threshold range is [1200mm, 1600mm], that is, when the forced deceleration switch is valid, the remaining distance is detected to be greater than 1600mm or less than 1200mm, then a slip fault is detected.

[0114] The present invention obtains and adjusts the number and installation position of the forced deceleration switches, calculates the speed-remaining distance protection curve when the elevator is decelerated at the rated elevator speed and the speed-time protection curve of the elevator rated elevator speed, and performs forced deceleration protection on the elevator according to the two protection curves of the forced deceleration switch detection results, and detects the failure of the forced deceleration switch through abnormal faults and slippage faults of the forced deceleration switch to cope with the impact of the failure of the forced deceleration switch. It can reduce the cost of the entire elevator, while ensuring that the elevator terminal station has an effective speed protection function. At the same time, when there are 2 or more forced deceleration switches, a pair of forced deceleration switches (one each at the upper and lower levels) can be cancelled, effectively reducing material costs and installation costs.

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

[0116] An acquisition module 1 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;

[0117] The first calculation module 2 is used to calculate the speed-remaining distance protection curve when the elevator is decelerated at 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 acquisition unit is used to acquire the number of forced deceleration switches in the elevator shaft, and set it to be a level 1 forced deceleration switch, a level 2 forced deceleration switch, ..., a level N forced deceleration switch; wherein N is the number of forced deceleration switches;

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

[0123] The second adjustment unit is used to cancel the 3-level forced deceleration switch when the number of the forced deceleration switches is three, and 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 the rated speed is decelerated and the corresponding remaining distance at each set time interval to form a speed-remaining distance protection curve;

[0126] A first setting unit is used for setting the real-time speed of the elevator at the remaining distance as the first speed and setting the speed on the speed-remaining distance protection curve at the remaining distance as the second speed when detecting that the forced deceleration switch is effective;

[0127] The first control unit is used 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 the speed and the 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, i.e. the beginning of the second section, and V1 is the speed at the end of the second section, i.e. 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 the rated speed is decelerated at each set time interval, and record the corresponding time point to form a speed-time protection curve;

[0140] A second setting unit is used for, when it is detected that the forced deceleration switch is effective, taking the real-time speed of the elevator at the set time point as the third speed, and taking the speed on the speed-time protection curve at the set time point as the fourth speed;

[0141] The second control unit is used 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, i.e. the beginning of the second section, and V1 is the speed at the end of the second section, i.e. the beginning of the third section.

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

[0152] An abnormality detection unit is used 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 the position of the forced deceleration switch installation position ± a preset abnormality detection threshold;

[0153] A third setting unit is used to use the distance between the remaining distance position and the installation position of the forced deceleration switch during the detection as the target distance when the forced deceleration switch is detected to be effective;

[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 shown in Figure 8 As shown. The computer device includes a processor, a memory, a network interface and a database connected through a system bus. Among them, the processor designed by 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 the 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 through 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 on which a computer program is stored. When the computer program is executed by a processor, any one of the above-mentioned elevator forced deceleration protection methods is implemented.

[0159] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing related 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 a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0160] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, device, article or method including 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 specification 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 position of the forced deceleration switches; wherein a forced deceleration switch includes an upper forced deceleration switch and a lower 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; 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; 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 obtaining and adjusting the number and installation positions of the forced deceleration switches includes: Obtain the number of forced deceleration switches in the elevator shaft, and set them to be level 1 forced deceleration switches, level 2 forced deceleration switches, ..., level N forced deceleration switches; wherein N is the number of forced deceleration switches; When there are two forced deceleration switches, the 2nd-level forced deceleration switch is cancelled, and the installation position of the 1st-level forced deceleration switch is adjusted to the position of the original 2nd-level forced deceleration switch; When the number of the forced deceleration switches is three, 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.

3. 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 is decelerated from rated speed are calculated at each set time interval to form a speed-remaining distance protection curve; When it is detected that the forced deceleration switch is effective, the real-time speed of the elevator at the set remaining distance is used as the first speed, and the speed on the speed at the set remaining distance-remaining distance protection curve is used as the second speed; When the first speed is greater than the second speed, the elevator is controlled to decelerate.

4. The elevator forced deceleration protection method according to claim 3, characterized in that: In the step of calculating the speed of the elevator when the rated speed is decelerated and the corresponding remaining distance at each set interval to form a speed-remaining distance protection curve, the calculation formula of the speed and the remaining distance 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: V t =V2-a max t5 Paragraph 3: 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, i.e. the beginning of the second section, and V1 is the speed at the end of the second section, i.e. the beginning of the third section.

5. 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 decelerating 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 point to form a speed-time protection curve; When it is detected that the forced deceleration switch is effective, 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.

6. The elevator forced deceleration protection method according to claim 5, 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 point to form a speed-time protection curve, the calculation formula of 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: V t =V2-a max t5 Paragraph 3: 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 first section jerk, J1 is the third section jerk, V2 is the speed at the end of the first section, i.e. the beginning of the second section, and V1 is the speed at the end of the second section, i.e. the beginning of the third section.

7. The elevator forced deceleration protection method according to claim 4, characterized in that: The step of performing fault detection according to the remaining distance and the installation position and effectiveness of the forced deceleration switch comprises: When the remaining distance of the elevator reaches the 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 ± the 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 the 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.

8. An elevator forced deceleration protection device, characterized in that: include: 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; The first calculation module is used to calculate the speed-remaining distance protection curve when the elevator is decelerated at the rated elevator 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.

9. 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 7 are implemented.

10. 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 7 are implemented.

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