A synchronization method for safety grating, safety grating and equipment

Abstract

The present application relates to a synchronization method, a security grating and a device, the method comprising the following steps: the transmitter of the security grating emits two infrared modulated signal lights composed of different verification methods in a polling manner, including a first infrared modulated signal light and the remaining infrared modulated signal lights, the first infrared modulated signal light and the remaining infrared modulated signal lights respectively carry information in different ways; the receiver distinguishes the received infrared modulated signal lights in two corresponding verification methods, and according to the information carried by the corresponding infrared modulated signal lights, the matching and synchronization of all transmitting tubes and receiving tubes in the transmitter and receiver of the security grating are achieved. The present application can reduce the use cost of the security grating, and reduce interference, so that the security grating can work normally.

Description

Technical Field

[0001] The present application relates to the field of safety gratings, and in particular to a synchronization method, a safety grating and a device for the same. Background Art

[0002] Safety gratings are photoelectric safety protection devices, also known as safety protectors, punch protectors, infrared safety protection devices, etc. They generate protective light curtains by emitting infrared rays. When the light curtain is blocked, the device sends a light-shielding signal to control potentially dangerous mechanical equipment to stop working. Therefore, the safety gratings are usually used in modern factories when people and machines work together on some potentially dangerous mechanical equipment (such as stamping machinery, shearing equipment, metal cutting equipment, automated assembly lines, automated welding lines, mechanical transmission and handling equipment) or dangerous areas (such as toxic, high pressure, high temperature, etc., which are easy to cause personal injury to operators), which can effectively avoid the occurrence of safety accidents and reduce the comprehensive cost of accidents. Existing safety gratings can also be used to be installed on both sides of elevator doors or subway doors to prevent elevator doors and subway doors from causing personal injury to people.

[0003] The safety grating is composed of multiple pairs of infrared emitting tubes and corresponding infrared receiving tubes. Generally, the transmitter and receiver of the safety grating are matched by line synchronization, and then the corresponding infrared emitting tube and the corresponding infrared receiving tube are matched. Under normal circumstances, only one pair of infrared emitting tubes and infrared receiving tubes work at the same time in a period of time. However, since the transmitter and receiver of the safety grating are two completely independent devices, when the transmitter and receiver are not synchronized, the infrared receiving tube in the receiver is very susceptible to interference from the corresponding infrared emitting tube in other non-transmitters, which makes the safety grating unable to work; In addition, the use of line synchronization to match the transmitter and receiver of the safety grating increases the cost of use and limits the application occasions. Summary of the invention

[0004] In order to reduce the use cost of the safety grating and reduce interference so that the safety grating can work normally, the present application provides a synchronization method, a safety grating and a device for the safety grating.

[0005] In the first aspect, the present application provides a synchronization method for a safety grating using the following technical solution:

[0006] A synchronization method for a safety grating comprises the following steps:

[0007] The transmitter of the safety grating emits two infrared modulated signal lights composed of different verification methods in a polling manner, including a first infrared modulated signal light and the remaining infrared modulated signal lights, wherein the first infrared modulated signal light and the remaining infrared modulated signal lights respectively carry information in different ways;

[0008] The receiver distinguishes the received infrared modulated signal light in two corresponding verification modes, and realizes the matching and synchronization of all transmitting tubes and receiving tubes in the transmitter and receiver of the safety grating according to the information carried by the corresponding infrared modulated signal light.

[0009] By adopting the above technical solution, especially by using the transmitter of the safety grating to emit two infrared modulated signal lights composed of different verification methods in a polling manner, the infrared modulated signal lights composed of different verification methods carry the information to be sent to the receiver, and the receiver distinguishes the received infrared modulated signal lights in two corresponding verification methods, thereby achieving the matching and synchronization of all transmitting tubes and receiving tubes in the transmitter and receiver of the safety grating. Compared with the prior art that uses line synchronization to achieve the matching method of the transmitter and receiver of the safety grating, the synchronization of the safety grating is achieved by light as a medium in the present application, so the cost is lower; at the same time, in the present application, the transmitter of the safety grating emits two infrared modulated signal lights composed of different verification methods in a polling manner to achieve matching with the receiver, so that the interference of the corresponding infrared transmitting tubes in other non-transmitters and the interference of the non-corresponding transmitting tubes in the transmitter can be reduced to a certain extent, so that the safety grating can work normally.

[0010] Preferably, the synchronization method of the safety grating specifically includes:

[0011] The infrared transmitting tubes in the transmitter of the safety grating emit infrared modulated signal lights one by one in a polling manner, wherein the infrared modulated signal light emitted by the first infrared transmitting tube is the first infrared modulated signal light, and the remaining infrared transmitting tubes emit the remaining infrared modulated signal lights; the first infrared modulated signal light and the remaining infrared modulated signal lights carry information in different ways respectively;

[0012] The first infrared receiving tube starts to receive infrared modulated signal light, and detects the received infrared modulated signal light and the information carried by it in a verification method corresponding to the first infrared modulated signal light, until the first infrared modulated signal light is received. The time axis starts from the time point when the first infrared receiving tube receives the first infrared modulated signal light, and the same working time point is set for each of the remaining infrared receiving tubes and the corresponding infrared transmitting tube; each of the remaining infrared receiving tubes detects the received infrared modulated signal light and the information carried by it according to the verification method corresponding to the remaining infrared modulated signal light, and when each of the infrared receiving tubes and the corresponding infrared transmitting tubes is at the set working time point, one-to-one matching and synchronization are achieved.

[0013] By adopting the above technical solution, especially the infrared modulated signal light emitted by the first infrared transmitting tube is the first infrared modulated signal light, the remaining infrared transmitting tubes emit the remaining infrared modulated signal lights, and the first infrared receiving tube starts to receive the infrared modulated signal light until the first infrared modulated signal light is received. The time axis is started from the time point when the first infrared receiving tube receives the first infrared modulated signal light, and the same working time point is set for each of the remaining infrared receiving tubes and the corresponding infrared transmitting tube, so that all infrared transmitting tubes and infrared receiving tubes are in one-to-one correspondence, thereby realizing the time synchronization of the transmitter and the receiver, and at the same time being able to distinguish the first infrared modulated signal light from the remaining infrared modulated signal lights, and engineers can arbitrarily set the infrared modulation signal and the working time point of each infrared transmitting tube and infrared receiving tube.

[0014] Preferably, the first infrared modulated signal light uses the interval time between multiple lights as a verification code, so that the first infrared modulated signal light can be detected at any time, reducing the difficulty of detecting the first infrared modulated signal light.

[0015] Or preferably, the first infrared modulated signal light uses a plurality of interval time threshold ranges between lights as a verification code, thereby further reducing the difficulty of detecting the first infrared modulated signal light.

[0016] Preferably, the remaining infrared modulated signal light is verified in binary coding form. By using the defined coding to send out infrared modulated signal light (the external messy signal will not pass the signal verification), it has a good anti-interference effect on the external light source and is not easily affected by the light of the same wavelength emitted by other devices.

[0017] More preferably, when the verification is performed in binary coding form, 1 represents that the receiver needs to detect more than X infrared lights within the time period T, and 0 represents that no infrared light detection is performed within the time period T.

[0018] Preferably, the first infrared receiving tube starts to receive infrared modulated signal light, and detects the received infrared modulated signal light and the information carried by it in a verification method corresponding to the first infrared modulated signal light, until the first infrared modulated signal light is received, the time axis is made from the time point when the first infrared receiving tube receives the first infrared modulated signal light, and the same working time point is set for each of the remaining infrared receiving tubes and the corresponding infrared transmitting tube; each of the remaining infrared receiving tubes detects the received infrared modulated signal light and the information carried by it according to the verification method corresponding to the remaining infrared modulated signal light, and when each of the infrared receiving tubes and the corresponding infrared transmitting tubes achieves one-to-one matching and synchronization at the set working time point, it includes:

[0019] The receiver controls the first infrared receiving tube to be in working state, and verifies the received infrared signal using the verification method corresponding to the first infrared modulated signal light and the information carried therein, until the verification is successful, that is, the first infrared modulated signal light is received;

[0020] The time axis is made from the time point when the first infrared receiving tube receives the first infrared modulated signal light, and the same working time point is set for each of the remaining infrared receiving tubes and the corresponding infrared transmitting tube;

[0021] The receiver controls the next infrared receiving tube to enter the working state, and uses the verification method corresponding to the remaining infrared modulated signal lights and the information carried therein to verify the received infrared signal light, so as to achieve one-to-one matching and synchronization at the working time point set by the infrared receiving tube and the corresponding infrared transmitting tube;

[0022] By analogy, the receiver controls the next infrared receiving tube to enter the working state, polling the infrared modulated signal light emitted by the receiving transmitter; until all the transmitting tubes and receiving tubes in the transmitter and receiver of the safety grating are matched and synchronized one by one.

[0023] By adopting the above technical means, the infrared receiving tubes in the receiver correspond and synchronize with the infrared transmitting tubes in the transmitter one by one according to the set time axis, thereby reducing interference and improving the synchronization efficiency of the safety grating.

[0024] In the second aspect, the present application provides a safety grating adopting the following technical solution:

[0025] A safety grating adopts any of the above-mentioned methods to match and synchronize all transmitting tubes and receiving tubes in a transmitter and a receiver.

[0026] In a third aspect, the present application provides a device that adopts the following technical solution:

[0027] A device comprises a safety grating, wherein the safety grating adopts any of the above-mentioned methods to match and synchronize all transmitting tubes and receiving tubes in the transmitter and receiver.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. The transmitter of the safety grating emits two infrared modulated signal lights composed of different verification methods in a polling manner, and the infrared modulated signal lights composed of different verification methods carry the information to be sent to the receiver. The receiver distinguishes the received infrared modulated signal lights in two corresponding verification methods, thereby achieving the matching and synchronization of all the transmitting tubes and receiving tubes in the transmitter and receiver of the safety grating. Compared with the prior art that uses line synchronization to achieve the matching of the transmitter and receiver of the safety grating, the synchronization of the safety grating is achieved by light as the medium in this application, so the cost is lower; at the same time, in this application, the transmitter of the safety grating emits two infrared modulated signal lights composed of different verification methods in a polling manner to achieve matching with the receiver, so that the interference of the corresponding infrared transmitting tubes in other non-transmitters and the interference of the non-corresponding transmitting tubes in the transmitter can be reduced to a certain extent, so that the safety grating can work normally.

[0030] 2. The present application combines the advantages of two verification methods. The first verification method of infrared modulated signal light (i.e., the time interval method) is easily affected by the same wavelength emitted by other devices but can detect the signal at any time. The remaining verification method of infrared modulated signal light (i.e., through) cannot detect the signal at any time but is not easily affected by the same wavelength emitted by other devices.

[0031] The difficulty of this application lies in how to synchronize the transmitter and receiver in time, and how to distinguish the first infrared modulated signal light from the remaining infrared modulated signal lights; the innovation lies in that engineers can arbitrarily set the infrared modulated signal and the working time point of each infrared transmitting tube and infrared receiving tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic flow chart of a synchronization method for a safety light grid in an embodiment of the present application.

[0033] Figure 2 This is a schematic diagram of the first infrared modulated signal light illustrated in an embodiment of the present application.

[0034] Figure 3 It is a schematic diagram of other infrared modulated signal lights illustrated in one embodiment of the present application.

[0035] Figure 4 It is a general schematic diagram of infrared modulated signal light emitted by a transmitter illustrated in one embodiment of the present application. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-Figure 4 This application is described in further detail.

[0037] The present application embodiment discloses a synchronization method for a safety grating. Figure 1 , a synchronization method of a safety grating, comprising the following steps:

[0038] S1, the transmitter of the safety grating emits two infrared modulated signal lights composed of different verification methods in a polling manner, including a first infrared modulated signal light and the remaining infrared modulated signal lights, wherein the first infrared modulated signal light and the remaining infrared modulated signal lights respectively carry information in different ways;

[0039] Specifically include:

[0040] The infrared transmitting tubes in the transmitter of the safety grating emit infrared modulated signal lights one by one in a polling manner, wherein the infrared modulated signal light emitted by the first infrared transmitting tube is the first infrared modulated signal light, and the remaining infrared transmitting tubes emit the remaining infrared modulated signal lights; the first infrared modulated signal light and the remaining infrared modulated signal lights carry information in different ways respectively;

[0041] Specifically, for example Figure 2 As shown, the first infrared modulated signal light uses the interval time between multiple lights as a check code, that is, the first infrared modulated signal light carries the information to be sent to the receiver at the interval time (in microseconds) of each light signal, such as: the interval time between the first light and the second light is 50us, then the receiver determines it as 50 after receiving it, the interval time between the second light and the third light is 20us, then the receiver determines it as 20 after receiving it, and so on. In specific implementation, in order to improve the anti-interference performance of the safety grating synchronization, when the first infrared modulated signal light uses the interval time between multiple lights as a check code for verification, a value group consisting of multiple values ​​can be used for matching. For example, if the preset value group that the first infrared receiving tube needs to receive is 10, 20, 15, and 22 in order to synchronize with the corresponding infrared transmitting tube, then it is equivalent to that the first infrared receiving tube needs to receive the first and second light beams at an interval of 10us, the second and third light beams at an interval of 20us, the third and fourth light beams at an interval of 15us, and the fourth and fifth light beams at an interval of 22us.

[0042] In order to make it easier to synchronize the first infrared receiving tube with the corresponding infrared transmitting tube, the first infrared modulated signal light can also use multiple interval time threshold ranges between lights as verification codes. For example, if the time interval between two lights sent by the transmitter is 50us, then the time interval between the two lights received by the receiver is 40-50us, which means that the first infrared receiving tube is matched with the first infrared transmitting tube.

[0043] The remaining infrared modulated signal light is verified in binary coding form. Figure 3 The remaining infrared modulated signal light is represented in binary form as shown. Figure 2 and Figure 3 The overall schematic diagram of the infrared modulated signal light emitted by the corresponding transmitter is as follows Figure 4 shown.

[0044] Specifically, when the verification is performed in binary coding, 1 represents that the receiver needs to detect more than X infrared lights within the T time period, and 0 represents that no infrared light detection is performed within the T time period, that is, the remaining infrared modulated signal light continuously emits infrared light within the specified time as 1 in binary, and does not emit any infrared light within the specified time as 0 in binary to carry the information to be sent to the receiver. For example, 1 represents that the receiver needs to detect more than 3 infrared lights within 10us, and 0 represents that no infrared light detection is performed within 10us. Taking 1001 as an example: the first 10us receiver needs to detect more than 3 infrared lights (correspondingly, the transmitter will emit more than 3 infrared lights, such as 5 infrared lights, within the first 10us), the second and third 10us receivers do not receive any signal (correspondingly, the transmitter does not emit any signal within the second and third 10us), and the fourth 10us receiver needs to detect more than 3 infrared lights (correspondingly, the transmitter will emit more than 3 infrared lights, such as 5 infrared lights, within the fourth 10us).

[0045] S2, the receiver distinguishes the received infrared modulated signal light in two corresponding verification modes, and realizes the matching and synchronization of all transmitting tubes and receiving tubes in the transmitter and receiver of the safety grating according to the information carried by the corresponding infrared modulated signal light.

[0046] Specifically include:

[0047] The first infrared receiving tube starts to receive infrared modulated signal light, and detects the received infrared modulated signal light and the information carried by it in a verification method corresponding to the first infrared modulated signal light, until the first infrared modulated signal light is received. The time axis starts from the time point when the first infrared receiving tube receives the first infrared modulated signal light, and the same working time point is set for each of the remaining infrared receiving tubes and the corresponding infrared transmitting tube; each of the remaining infrared receiving tubes detects the received infrared modulated signal light and the information carried by it according to the verification method corresponding to the remaining infrared modulated signal light, and when each of the infrared receiving tubes and the corresponding infrared transmitting tubes is at the set working time point, one-to-one matching and synchronization are achieved.

[0048] The first infrared receiving tube starts to receive infrared modulated signal light, and detects the received infrared modulated signal light and the information carried by it in a verification method corresponding to the first infrared modulated signal light, until the first infrared modulated signal light is received, the time axis is made from the time point when the first infrared receiving tube receives the first infrared modulated signal light, and the same working time point is set for each of the remaining infrared receiving tubes and the corresponding infrared transmitting tube; each of the remaining infrared receiving tubes detects the received infrared modulated signal light and the information carried by it according to the verification method corresponding to the remaining infrared modulated signal light, and when each of the infrared receiving tubes and the corresponding infrared transmitting tubes achieves one-to-one matching and synchronization at the set working time point, it includes:

[0049] S21, the receiver controls the first infrared receiving tube to be in working state, and uses the verification method corresponding to the first infrared modulated signal light and the information carried therein to verify the received infrared signal until the verification is successful, that is, the first infrared modulated signal light is received;

[0050] S22, starting from the time point when the first infrared receiving tube receives the first infrared modulated signal light as the time axis, setting the same working time point for each of the remaining infrared receiving tubes and the corresponding infrared transmitting tube;

[0051] S23, the receiver controls the next infrared receiving tube to enter the working state, and uses the verification method corresponding to the remaining infrared modulated signal lights and the information carried therein to verify the received infrared signal light, so as to achieve one-to-one matching and synchronization at the working time point set by the infrared receiving tube and the corresponding infrared transmitting tube;

[0052] S24, and so on, the receiver controls the next infrared receiving tube to enter the working state, and polls the infrared modulated signal light emitted by the receiving transmitter; until all the transmitting tubes and receiving tubes in the transmitter and receiver of the safety grating are matched and synchronized one by one.

[0053] The embodiment of the present application also discloses a safety grating. A safety grating adopts any of the above methods to match and synchronize all the transmitting tubes and receiving tubes in the transmitter and receiver.

[0054] The embodiment of the present application also discloses a device. A device includes a safety grating, wherein the safety grating uses any of the above methods to match and synchronize all transmitting tubes and receiving tubes in the transmitter and receiver.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A synchronization method for a safety light curtain, characterized in that: The following steps are involved: The transmitter of the safety grating emits two infrared modulated signal lights composed of different verification methods in a polling manner, including a first infrared modulated signal light and the remaining infrared modulated signal lights, wherein the first infrared modulated signal light and the remaining infrared modulated signal lights respectively carry information in different ways; The receiver distinguishes the received infrared modulated signal light in two corresponding verification modes, and realizes the matching and synchronization of all transmitting tubes and receiving tubes in the transmitter and receiver of the safety grating according to the information carried by the corresponding infrared modulated signal light; specifically including: The infrared transmitting tubes in the transmitter of the safety grating emit infrared modulated signal lights one by one in a polling manner, wherein the infrared modulated signal light emitted by the first infrared transmitting tube is the first infrared modulated signal light, and the remaining infrared transmitting tubes emit the remaining infrared modulated signal lights; the first infrared modulated signal light and the remaining infrared modulated signal lights carry information in different ways respectively; The first infrared receiving tube starts to receive infrared modulated signal light, and detects the received infrared modulated signal light and the information carried by it in a verification method corresponding to the first infrared modulated signal light, until the first infrared modulated signal light is received. The time axis starts from the time point when the first infrared receiving tube receives the first infrared modulated signal light, and the same working time point is set for each of the remaining infrared receiving tubes and the corresponding infrared transmitting tube; each of the remaining infrared receiving tubes detects the received infrared modulated signal light and the information carried by it according to the verification method corresponding to the remaining infrared modulated signal light, and when each of the infrared receiving tubes and the corresponding infrared transmitting tubes is at the set working time point, one-to-one matching and synchronization are achieved.

2. The synchronization method of the safety light grid according to claim 1, characterized in that: The first infrared modulated signal light uses the interval time between multiple lights as a verification code.

3. The synchronization method of the safety light grid according to claim 1, characterized in that: The first infrared modulated signal light uses a plurality of interval time threshold ranges between lights as a verification code.

4. The synchronization method of the safety light grid according to claim 1, characterized in that: The remaining infrared modulated signal lights are verified in binary coded form.

5. The synchronization method of the safety light grid according to claim 4, characterized in that: When the verification is performed in the form of binary code, 1 represents that the receiver needs to detect more than X infrared lights within the time period T, and 0 represents that no infrared light detection is performed within the time period T.

6. The synchronization method of the safety light grid according to claim 1, characterized in that: The first infrared receiving tube starts to receive infrared modulated signal light, and detects the received infrared modulated signal light and the information carried by it in a verification method corresponding to the first infrared modulated signal light, until the first infrared modulated signal light is received, the time axis is made from the time point when the first infrared receiving tube receives the first infrared modulated signal light, and the same working time point is set for each of the remaining infrared receiving tubes and the corresponding infrared transmitting tube; each of the remaining infrared receiving tubes detects the received infrared modulated signal light and the information carried by it according to the verification method corresponding to the remaining infrared modulated signal light, and when each of the infrared receiving tubes and the corresponding infrared transmitting tubes achieves one-to-one matching and synchronization at the set working time point, it includes: The receiver controls the first infrared receiving tube to be in working state, and verifies the received infrared signal using the verification method corresponding to the first infrared modulated signal light and the information carried therein, until the verification is successful, that is, the first infrared modulated signal light is received; The time axis is made from the time point when the first infrared receiving tube receives the first infrared modulated signal light, and the same working time point is set for each of the remaining infrared receiving tubes and the corresponding infrared transmitting tube; The receiver controls the next infrared receiving tube to enter the working state, and uses the verification method corresponding to the remaining infrared modulated signal lights and the information carried therein to verify the received infrared signal light, so as to achieve one-to-one matching and synchronization at the working time point set by the infrared receiving tube and the corresponding infrared transmitting tube; By analogy, the receiver controls the next infrared receiving tube to enter the working state, polling the infrared modulated signal light emitted by the receiving transmitter; until all the transmitting tubes and receiving tubes in the transmitter and receiver of the safety grating are matched and synchronized one by one.

7. A safety grating, characterized in that: The method as described in any one of claims 1 to 6 is used to match and synchronize all transmitting tubes and receiving tubes in the transmitter and receiver.

8. A device comprising a safety light barrier, characterized in that The safety grating adopts the method described in any one of claims 1 to 6 to match and synchronize all transmitting tubes and receiving tubes in the transmitter and receiver.

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