Blasting detection device and blasting detection system

Abstract

To surely detect blasting by a blasting machine by suppressing erroneous detection and non-detection.SOLUTION: A blasting detection device 1 detects blasting by a blasting machine 10 for detonating an electric detonator 12. This device is provided with an electromagnetic field detecting part mounted in the vicinity of a body side 10a of a blasting machine 10 and detecting an electromagnetic field generated from the blasting machine 10 in blasting. The blasting detection device 1 includes a communication part 4 for transmitting a detection signal detected by the electromagnetic field detection part to the outside.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a blast detection device and a blast detection system. [Background technology]

[0002] At construction sites such as tunnel construction sites, tunnel cycle time (hereafter referred to as cycle time), which measures the work time of each process, is used to improve productivity. In recent years, automatic cycle time acquisition technology using digital technology has been developed, and the accuracy of cycle time acquisition information has improved. A known technology for detecting blasting by a blasting device for detonating an electric detonator is disclosed in, for example, Patent Document 1. Patent Document 1 relates to a blasting time detection device, which includes a current detection unit that detects the current in an electric wire connected to the electric detonator without being in electrical contact with the electric wire, a blasting time determination unit that determines the blasting time based on the detected current, a signal generation unit that generates a signal corresponding to the determined blasting time, and a signal output unit that outputs the generated signal to the outside.

[0003] Meanwhile, in a site management system for a construction site, a method of detecting blasting by a blasting device using an acceleration sensor to detect vibrations during blasting is also known. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-169832 Summary of the Invention [Problem to be solved by the invention]

[0005] The blasting time detection device in Patent Document 1 is configured by arranging a detection circuit in parallel with a blasting bus line connected to an electric detonator, or by modifying the blasting bus line to arrange the detection circuit. However, a configuration in which a detection circuit is connected in parallel with an electric detonator is not practical because it may cause false detections in connection tests of the electric detonator. Furthermore, a configuration in which the blasting bus line is modified carries the risk of improper connections such as disconnections, short circuits, and ground faults. Furthermore, in the method of detecting vibrations during blasting using an acceleration sensor, there is a risk of false detection due to vibrations other than blasting, or failure to detect weak vibrations.

[0006] The present invention aims to solve the above-mentioned problems and propose a blasting detection device and a blasting detection system that can reliably detect blasting by a blasting device by suppressing false detections and non-detections. [Means for solving the problem]

[0007] The blasting detection device of the present invention, which solves the above-mentioned problems, detects blasting by a blasting device that detonates an electric detonator. The blasting detection device is attached near the main body of the blasting device and includes an electromagnetic field detection unit that detects the electromagnetic field generated by the blasting device during blasting. This invention detects the electromagnetic field generated by the blasting device during blasting, allowing blasting to be detected regardless of the connection status of the blasting bus. This means that there is no risk of false detection during the connection test of the electric detonator, as in a configuration where a detection circuit is connected in parallel to the electric detonator, and there is no risk of improper connections such as disconnections, short circuits, or ground faults, as occurs when the blasting bus is modified for detection. Furthermore, there is no risk of false detection due to vibrations other than blasting, or failure to detect due to weak vibrations, as occurs when using an acceleration sensor.

[0008] The blasting detection device preferably includes a communication unit that transmits the detection signal detected by the electromagnetic field detection unit to the outside. With this configuration, the detection signal at the time of blasting can be transmitted externally via the communication unit, allowing the time of blasting to be detected from outside. The detection signal can also be transmitted to a remote location via a communication network, making it possible to detect the time of blasting from a distance and facilitating the management of blasting information. In addition, by sending the detection signal at the time of blasting to a server, it becomes possible to store and manage large amounts of data, and it becomes possible to use blasting information between different devices and systems.

[0009] It is preferable that the communication unit transmits the detection signal to the outside by radio signal. The use of radio signals allows communication without the use of physical cables, which gives greater freedom in the placement and movement of blasting equipment.

[0010] It is preferable that the power of the radio signal transmitted from the communication unit is smaller than the power of the electromagnetic field generated by the blasting device. This configuration can suppress the influence on the detection of the electromagnetic field.

[0011] It is preferable that the frequency of the radio signal transmitted from the communication unit is higher than the frequency of the electromagnetic field generated by the blasting device. In this configuration, the frequency of the radio signal is higher than the frequency of the electromagnetic field, so that interference with the electromagnetic field detection unit can be minimized.

[0012] In the blasting detection device, it is preferable that the electromagnetic field detection unit and the communication unit are housed in a single housing. In this configuration, the housing protects the electromagnetic field detection unit and communication unit from the external environment, improving durability. They are also less susceptible to dust, moisture, shock, etc. Furthermore, since they are housed in a single housing, the connection between the electromagnetic field detection unit and communication unit is optimized, improving the reliability of the transmission of detection signals.

[0013] The housing is preferably electrically insulated from the outside of the housing. This configuration ensures stable operation of the blast detection device and prevents interference with the blast current by the blast detection device.

[0014] The interior of the housing is preferably sealed. This configuration can protect the internal components and circuits from moisture, dust, foreign matter, etc. in the external environment, thereby maintaining the normal operation of the blast detection device.

[0015] The body of the blasting device has a terminal portion to which a blasting main line is connected, and it is preferable that the blasting detection device is attached near the terminal portion on the side of the body of the blasting device. In this configuration, the electromagnetic field generated by the blasting device can be detected in the vicinity of the terminal portion where the strength of the electromagnetic field is relatively high, thereby improving the sensitivity of the detection signal.

[0016] The blasting detection system of the present invention for solving the above problem includes the blasting detection device and a server, and the server has a memory unit that stores the detection signal and the blasting time, with the reception time of the detection signal received from the communication unit being the blasting time. In the present invention, the detection signals and blasting times during blasting are centrally managed by a server, making updates and backups easy.

[0017] The blasting detection system includes a display terminal, and the display terminal preferably includes a display unit that reads out and displays the detection signal and the blasting time stored in the memory unit. In this configuration, the blasting signal and the blasting time can be easily confirmed on the display terminal. Also, multiple display terminals can access the same data. [Effects of the Invention]

[0018] According to the blasting detection device and blasting detection system of the present invention, blasting by a blasting device can be reliably detected by suppressing false detection and non-detection. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view showing a state in which a blasting detection device according to a first embodiment is attached to a blasting machine. FIG. [Figure 2] FIG. 2 is a partial cross-sectional explanatory view showing the configuration of the blasting detection device. [Figure 3] FIG. 10 is a block diagram showing the configuration of the blasting detection system. [Figure 4] 10 is a flowchart showing the procedure of blasting detection processing and the procedure of server storage processing. [Figure 5] 10 is a flowchart showing a procedure of a terminal display process and a procedure of a server extraction process. [Figure 6] FIG. 10 is a perspective view showing a state in which a blasting detection device according to a second embodiment is attached to a blasting machine. [Figure 7] FIG. 10 is a perspective view showing a state in which a blasting detection device according to a modified example of the second embodiment is attached to a blasting machine. [Figure 8] FIG. 10 is a partial cross-sectional explanatory view showing the configuration of a modified example of a blasting detection device. DETAILED DESCRIPTION OF THE INVENTION

[0020] DETAILED DESCRIPTION OF THE INVENTION The blasting detection device and the blasting detection system of the present invention will be described in detail below with reference to the accompanying drawings. The blasting that is the subject of the present invention is electric blasting, which is the mainstream in construction work such as tunnel construction. (First embodiment) FIG. 1 is a perspective view showing the blasting detection device of the first embodiment attached to a blasting machine. A plurality of electric detonators 12 are electrically connected to the blasting machine 10 via a blasting main line 11. The blasting machine 10 is a small, portable device and includes a main body 10a formed in a rectangular parallelepiped shape from a durable material. A terminal portion 10c is provided on an upper surface 10b of the main body 10a. The blasting main line 11 is connected to the terminal portion 10c. The upper surface 10b of the main body 10a is also provided with operation buttons and the like for operating the blasting (not shown).

[0021] The blasting detection device 1 is separate from the blasting device 10 and has a compact shape that can be attached to the side of the main body 10a of the blasting device 10. Fig. 1 shows an example in which it is attached to one side surface 10d near the connection terminal 10c using an attachment means such as an adhesive material. The blasting detection device 1 may also be attached to the other side surface 10e that is continuous with the one side surface 10d.

[0022] The blasting detection device 1 includes a detection coil 2 and a detection circuit 3 as electromagnetic field detectors, a communication unit 4, a power supply unit 5, and a housing 6. The detection coil 2 senses the electromagnetic field of the blasting device 10 and converts the changes into an electrical signal. The detection coil 2 is a highly conductive wire, such as copper or aluminum, wound into a coil. The detection coil 2 is electrically insulated from the blasting device 10. In this embodiment, the detection coil 2 and the detection circuit are integrated. The detection circuit 3 amplifies, filters, and rectifies the electrical signal from the detection coil 2 to generate a detection signal. The detection circuit 3 is, for example, a latch circuit that detects the rising edge of the electrical signal. A latch circuit is suitable for detecting the electrical signal from the detection coil 2 because it can detect smaller currents than a photocoupler or the like. The communication unit 4 has a function of transmitting the detection signal generated by the detection circuit 3 to the outside via a wireless signal. The communication unit 4, for example, converts the detection signal into a format suitable for communication and encodes it. The power of the radio signal transmitted from the communication unit 4 is lower than the power of the electromagnetic field generated by the blasting device 10. Furthermore, the frequency of the radio signal transmitted from the communication unit 4 is higher than the frequency of the electromagnetic field generated by the blasting device 10. The radio signal transmitted from the communication unit 4 is associated with information such as the management number of the construction site where the blasting took place and the management number of the blasting device 10. For example, a signal such as Bluetooth (registered trademark) can be used as the radio signal. Note that the radio signal transmitted from the communication unit 4 may include the blasting time. The blasting time is, for example, the time when the detection signal was generated or the time when the radio signal was transmitted. In addition, the blasting detection device 1 is provided with a reset circuit (not shown) that returns the device from a state after blasting detection to a standby state before blasting detection. The blasting detection device 1 is also provided with a determination means for determining whether the voltage of the power supply unit 5 is a predetermined voltage for driving the blasting detection device 1. Note that the determination means is not an essential component.

[0023] The power supply unit 5 supplies power to the detection circuit 3 and the communication unit 4. As the power supply unit 5, a lithium coin battery or the like that has low self-discharge and is suitable for long-term operation can be used. The housing 6 is a box-shaped case made of a material such as plastic. The housing 6 houses the detection coil 2, the detection circuit 3, the communication unit 4, and the power supply unit 5 and protects these components from the external environment. The housing 6 is electrically insulated from the outside of the housing 6. The interior of the housing 6 is sealed. The housing 6 has a structure that does not have any openings or gaps that communicate between the inside and outside of the housing 6, and is formed to be watertight. The housing 6 may be formed by combining multiple members. The housing 6 may also have a lid or the like (not shown) to enable replacement of the lithium coin battery of the power supply unit 5, etc. In this case, the lid or the like is preferably attached via a sealing member or the like to ensure the hermeticity of the housing 6. In addition, within the housing 6, the components are electrically connected to each other.

[0024] FIG. 3 is a block diagram showing the configuration of the blasting detection system. As shown in Fig. 3, the blasting detection system comprises a blasting detection device 1, a server 20, and a display terminal 30. The blasting detection device 1, the server 20, and the display terminal 30 are connected via a communication network 40. The communication network 40 is made up of various communication systems constructed using, for example, the Internet, a LAN, a wireless base station, etc.

[0025] The server 20 comprises a server transmitting / receiving unit 21, a server control unit 22, and a memory unit 23. The server transmitting / receiving unit 21 receives wireless signals (detection signals and the information associated therewith) transmitted from the blasting detection device 1 via the communication network 40. The server transmitting / receiving unit 21 also transmits the detection signals, the information, and the blasting times described below, read from the memory unit 23 under the control of the server control unit 22, to the display terminal 30 via the communication network 40.

[0026] The server control unit 22 sets the reception time of the detection signal and information received by the server transmitting / receiving unit 21 as the blasting time, and stores the set blasting time in association with the detection signal and information in the memory unit 23. If the detection signal and information received by the server transmitting / receiving unit 21 includes the blasting time generated by the blasting detection device 1, the blasting time is stored in the memory unit 23. The server control unit 22, for example, efficiently allocates resources of the storage unit and controls the storage unit so that data can be accessed by multiple display terminals 30. The server control unit 22 also controls the server transceiver unit 21 to appropriately read out the detection signal, information, and blasting time data stored in the storage unit 23 based on a request from the display terminal 30, and to transmit this data to the display terminal 30. The memory unit 23 stores the detection signal, information, and blasting time data received by the server transceiver unit 21 under the control of the server control unit 22. The data stored in the memory unit 23 is appropriately read out under the control of the server control unit 22.

[0027] The display terminal 30 is, for example, a smartphone or tablet carried by a worker at a construction site, or a personal computer in a site office. The display terminal 30 comprises a terminal transmitting / receiving unit 31, a terminal control unit 32, and a display unit 33. The terminal transmitting / receiving unit 31 transmits a signal to the server 20 via the communication network 40 requesting data on the detection signal, information, and blasting time to be displayed on the display unit 33 under the control of the terminal control unit 32. Meanwhile, the terminal transmitting / receiving unit 31 receives the above data sent from the server 20 via the communication network 40.

[0028] The terminal control unit 32 manages and controls the overall operation of the display terminal 30, and processes the received data efficiently and safely. Specifically, the terminal control unit 32 controls the terminal transmitting / receiving unit 31 to request the data stored in the server 20 in response to input from an input device provided on the display terminal 30. The terminal control unit 32 also performs processing to display the data received by the terminal transmitting / receiving unit 31 on the display unit 33. The terminal control unit 32 can also process the data from the server 20 in real time and control the display unit 33 to display the updated data immediately. This allows the latest data to be provided to the operator of the display terminal 30.

[0029] The display unit 33 displays the data received by the terminal transmitting / receiving unit 31 under the control of the terminal control unit 32. The display unit 33 can also display the data updated by the terminal control unit 32 in real time.

[0030] Next, the processing procedure of the blasting detection system of this embodiment will be described. Fig. 4 is a flowchart showing the blasting detection processing procedure and the server storage processing procedure, and Fig. 5 is a flowchart showing the terminal display processing procedure and the server extraction processing procedure. Prior to the blasting detection process, the blasting detection device 1 is attached to one side surface 10d of the blasting machine 10 (see FIG. 1) by an attachment means.

[0031] As shown in Fig. 4, the blast detection process includes a detection step ST1, a generation step ST2, a transmission step ST3, and a power supply confirmation step ST4, while the server storage process includes a reception step ST5 and a recording step ST6.

[0032] In the detection step ST1 of the blasting detection process, the detection coil 2 of the blasting detection device 1 detects the electromagnetic field of the blasting device 10 and converts the detected electromagnetic field into an electric signal. In the generating step ST2, the detection circuit 3 generates a detection signal based on the electrical signal of the detection coil 2. In the transmission step ST3, the communication unit 4 transmits the detection signal generated by the detection circuit 3 to the server 20 via a wireless signal. The wireless signal is associated with information such as the management number of the construction site where the blasting was performed and the management number of the blasting device 10. In power supply confirmation step ST4, it is determined whether the voltage of power supply unit 5 is a predetermined voltage (ON) or not (OFF). If it is determined in power supply confirmation step ST4 that the voltage of power supply unit 5 is a predetermined voltage (ON), the process returns to detection step ST1, and the following generation step ST2 and transmission step ST3 are repeated. If it is determined in power supply confirmation step ST4 that the voltage of power supply unit 5 is not a predetermined voltage (OFF), the blasting detection process is terminated.

[0033] When the detection signal and information are transmitted to the server 20 in the transmission step ST3, they are received by the server transceiver 21 of the server 20 in a reception step ST5 of the server storage process. Then, in a recording step ST6, the server control unit 22 sets the reception time of the detection signal and information received by the server transceiver 21 as the blasting time, associates the set blasting time with the detection signal and information, and stores it in the memory unit 23, and then ends the server storage process.

[0034] 5, the procedure for the terminal display process includes a data request step ST7 and a display step ST11, while the procedure for the server extraction process includes a request signal receiving step ST8, a read step ST9, and a data transmitting step ST10.

[0035] When a request for detection signal, information, and blasting time data is made by input from an input device provided on the display terminal 30, in data request step ST7 of the terminal display processing, the terminal transceiver unit 31 transmits a signal to the server 20 requesting the detection signal, information, and blasting time data to be displayed on the display unit 33 under the control of the terminal control unit 32. In a request signal receiving step ST8 of the server extraction process, the server transceiver 21 receives a signal requesting data. In a reading step ST9, the server control unit 22 appropriately reads out the detection signal, information, and blasting time data stored in the memory unit 23 based on the request signal. In step ST10, the server control unit 22 controls the server transmitting / receiving unit 21 to transmit the data read from the storage unit 23 to the display terminal 30, and then ends the server extraction process.

[0036] When the terminal transceiver unit 31 of the display terminal 30 receives data from the server 20, in display step ST11 of the server extraction process, the terminal control unit 32 performs processing to display the received data on the display unit 33, and then terminates the terminal display process.

[0037] The blasting detection device 1 of this embodiment described above detects the electromagnetic field generated by the blasting device 10 during blasting, making it possible to detect blasting regardless of the connection state of the blasting bus line 11. In other words, unlike conventional configurations in which a detection circuit is connected in parallel to the electric detonator 12, there is no false detection during a connection test of the electric detonator 12, and there is no risk of improper connections such as disconnections, short circuits, or ground faults, as occurs when the blasting bus line 11 is modified for detection. Furthermore, there is no false detection due to vibrations other than blasting, or failure to detect due to weak vibrations, as occurs when an acceleration sensor is used.

[0038] In addition, the detection signal at the time of blasting can be transmitted externally via the communication unit 4, allowing the time of blasting to be detected from outside. The detection signal can also be transmitted to a remote location via the communication network 40 or a dedicated line, making it possible to detect the time of blasting from a distance and facilitating the management of blasting information. In addition, sending the detection signal at the time of blasting to a server makes it possible to store and manage large amounts of data, and also makes it possible to use blasting information between different devices and systems.

[0039] Furthermore, the communication unit 4 transmits the detection signal to the outside by wireless signal, so communication can be performed without using a physical cable, which increases the freedom of installation location and movement of the blasting device 10. Furthermore, since the power of the wireless signal is smaller than the power of the electromagnetic field to be detected, it is possible to suppress the influence on the detection of the electromagnetic field. Furthermore, since the frequency of the radio signal is higher than the frequency of the electromagnetic field, interference with the detection coil 2 and the detection circuit 3 can be minimized.

[0040] Furthermore, since the components of the blast detection device 1 are housed in a single housing 6, the components can be protected from the external environment, improving durability. The device is also less susceptible to the effects of dust, moisture, shock, etc. Furthermore, since the components are housed in a single housing 6, the connections between the components are optimized, improving the reliability of the transmission of detection signals. Furthermore, since the housing 6 is electrically insulated from the outside, stable operation of the blasting detection device 1 is ensured. Also, interference of the blasting detection device 1 with the blasting current can be prevented. Furthermore, since the inside of the housing 6 is sealed, the internal parts and circuits can be protected from external environmental moisture, dust, foreign matter, etc. Therefore, the normal operation of the blasting detection device 1 can be maintained in an optimal manner.

[0041] Furthermore, since the electromagnetic field generated by the blasting device 10 can be detected in the vicinity of the terminal portion 10c where the strength of the electromagnetic field is relatively high, the sensitivity of the detection signal can be improved.

[0042] Furthermore, according to the blasting detection system of this embodiment, the detection signals, information, and data on the blasting time at the time of blasting are managed centrally by the server 20, which simplifies updates and backups. In addition, the blasting signal, information, and blasting time can be easily checked on the display terminal 30, making it easy to manage the blasting situation. Also, multiple display terminals 30 can access the same data.

[0043] (Second embodiment) 6 is a perspective view showing the blasting detection device according to the second embodiment attached to a blasting machine. The blasting detection device 1A of this embodiment differs from the first embodiment in that the detection coil 2 is pulled out of the housing 6A and attached directly to one side surface 10d of the blasting machine 10. The detection coil 2 is electrically connected to the detection circuit 3 in the housing 6A via a connection wire 2a. The detection coil 2 is electrically insulated from the blasting machine 10. In addition to the detection circuit 3, the housing 6A also contains a communication unit 4 and a power supply unit 5. The housing 6A is attached to the other side 10e of the blasting machine 10. It should be noted that the housing 6A does not necessarily have to be attached to the blasting machine 10.

[0044] According to the blasting detection device 1A of this embodiment, the detection coil 2 is directly attached to one side surface 10d of the blasting machine 10, so that the electromagnetic field can be measured accurately and the sensitivity of blasting detection is improved.

[0045] 7 is a perspective view showing a blasting detection device according to a modification of the second embodiment attached to a blasting machine. In this modification, the detection coil 2 is wound around the trunk of the main body 10a near the terminal portion 10c. In this modification, the detection coil 2 is also electrically connected to the detection circuit 3 in the housing 6A via a connection wire 2a. The housing 6A is similarly attached to the other side surface 10e of the blasting device 10, but at a different position. Note that the housing 6A does not necessarily have to be attached to the blasting device 10.

[0046] In the modified blasting detection device 1A, the detection coil 2 is wound directly around the barrel of the main body 10a of the blasting device 10, making it possible to adapt to a structure where there is no room to attach the detection coil 2 to one side 10d of the blasting device 10, for example.

[0047] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and each of the above-described components can be appropriately modified within the scope of the present invention. For example, the blast detection devices 1, 1A are shown as having all or some of their components housed in the housings 6, 6A, but this is not limitative and the housings 6, 6A may not be provided. In this case, the effort of housing the components in the housings 6, 6A can be eliminated, leading to cost reduction. The blasting detection devices 1, 1A may also be configured to communicate with the outside world using a physical cable, ensuring stable communication quality without radio interference.

[0048] In addition, the blasting time is configured to be set by the server 20 based on the time of reception of the detection signal and information, but this is not limited to this and it may be configured to be set on the blasting detection device 1, 1A side. In this case, the blasting time can be set on the blasting detection device 1, 1A side regardless of the configuration of the server 20, which increases versatility.

[0049] In addition, in the first embodiment, the detection coil 2 is shown as being integral with the detection circuit 3, but this is not limited to this, and the detection coil 2 may be separated from the detection circuit 3 and placed on the inner surface of the housing 6, etc., as shown in Figure 8.

[0050] In the first and second embodiments, the blasting detection devices 1, 1A are shown with the housings 6, 6A and the detection coil 2 attached directly to one side surface 10d of the blasting device 10, but this is not limited to this and they may be attached near the main body 10a of the blasting device 10, for example, to a case that houses the main body 10a of the blasting device 10 or a bracket that supports the main body 10a, at a position away from one side surface 10d of the main body 10a, to detect the electromagnetic field of the blasting device 10. Also, the detection coil 2 may be attached directly to the main body 10a of the blasting device 10, and the blasting detection device 1A may be attached to equipment at a construction site, etc. [Explanation of symbols]

[0051] 1. Blasting detection device 2. Detection coil (electromagnetic field detection section) 3. Detection circuit (electromagnetic field detection section) 4. Communications Department 6. Cabinet 10 Explosives 10a body 10c terminal section 10d One side (side) 10e Other side (side) 11 Blasting Bus Line 12 Electric detonator 20 servers 23 Memory section 30 Display terminal 33 Display section 40 Communication Network

Claims

1. A blasting detection device that detects blasting by a blasting device that detonates an electric detonator, A blasting detection device characterized by having an electromagnetic field detection unit attached near the main body of the blasting device and detecting the electromagnetic field generated from the blasting device during blasting.

2. 2. The blasting detection device according to claim 1, further comprising a communication unit that transmits the detection signal detected by the electromagnetic field detection unit to an external device.

3. 3. The blasting detection device according to claim 2, wherein the communication unit transmits the detection signal to the outside by radio signal.

4. 4. The blasting detection device according to claim 3, wherein the power of the radio signal transmitted from the communication unit is smaller than the power of the electromagnetic field generated by the blasting device.

5. 4. A blasting detection device according to claim 3, wherein the frequency of the radio signal transmitted from the communication unit is higher than the frequency of the electromagnetic field generated by the blasting device.

6. 3. The blasting detection device according to claim 2, wherein the electromagnetic field detection unit and the communication unit are housed in a single housing.

7. 7. The blast detection device according to claim 6, wherein the housing is electrically insulated from the outside of the housing.

8. 7. The blast detection device according to claim 6, wherein the interior of the housing is sealed.

9. The body of the blasting device has a terminal portion to which a blasting main line is connected, 3. A blasting detection device according to claim 1 or claim 2, wherein the blasting detection device is attached to a side surface of the blasting device body in the vicinity of the terminal portion.

10. A blasting detection system comprising the blasting detection device according to any one of claims 2 to 8 and a server, The blasting detection system is characterized in that the server has a memory unit that stores the detection signal and the blasting time, with the reception time of the detection signal received from the communication unit being the blasting time.

11. Equipped with a display terminal, The blasting detection system according to claim 10, characterized in that the display terminal is provided with a display unit that reads out and displays the detection signal and the blasting time stored in the memory unit.

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