JP3324700B2 - Wireless detonation method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless detonation method and apparatus, and more particularly to a wireless detonation method and apparatus for remotely igniting a plurality of detonators simultaneously by a command radio wave transmitted from a command device.

[0002]

2. Description of the Related Art Generally, when various devices are controlled by wireless communication, transmission and confirmation of a command are executed by a command signal from a commander and a response signal from the commander. When the command is not transmitted, there is no response to the command, so that the commanding side transmits the command signal again so that the command can be transmitted more reliably.

[0003] Conventionally, when a detonator is fired by remote control, the detonator is operated by one-to-one communication in a similar manner.

[0004]

By the way, when a plurality of detonators are used and it is desired to increase the power of the detonators, the explosives of the adjacent detonators can explode at once without affecting each other. It is conceivable to transmit a firing command signal from a single command device to each of the plurality of detonating devices by the above-described conventional method. Since it is not always possible to receive signals properly, there is naturally a difference in firing time between a signal received by one command and a signal received for the first time after a plurality of commands. When this time difference occurs, there is a problem that the blast of the explosive of the detonating device which has received the ignition command signal earlier affects the other device, the other device cannot operate normally, and the fire does not occur.

Therefore, in order to solve this problem, the command device does not directly transmit the firing command signal,
As described above, there is a method of one-to-one communication with each detonator as a command signal using a time until an ignition signal is output. However, in this method, the command may be retransmitted due to a failure such as noise while communicating with a plurality of detonators, so that the time from the command to the firing signal output, that is, the time until firing, is reduced. I have to take a long time. In this case, there is a problem that individual differences easily occur in the measurement time of the detonator, and the time from the firing command operation to the output of the ignition signal varies depending on the detonator.

As another method, a command device transmits a firing command signal to all of the plurality of detonating devices, and a detonating device that receives the command outputs a firing signal without receiving a response at the same time as receiving the command. There is. However, in this method, the firing signal is output immediately after receiving the command, so that there is no time difference and the time from the firing operation is constant. However, if the command signal is not received, there is a problem that a detonating device that does not fire occurs. .

The present invention has been made in view of the above-mentioned conventional problems, and provides a wireless detonation method and apparatus capable of reliably firing a plurality of detonating devices simultaneously even in wireless communication in which a communication error is relatively likely to occur. With the goal.

[0008]

Wireless detonator method of the present invention, in order to solve the problems] transmits the command radio from the command device, by receiving the command radio with a plurality of detonators, firing time T ₀ to a predetermined
A wireless detonator method ignite simultaneously a plurality of detonators, as command radio from the command device, before a plurality of detonators
A time-specified firing signal for firing all at once at the firing time T ₀ is transmitted a plurality of times at predetermined intervals, and each detonator has the aforementioned
When the time-specified firing signal is received, the
Reply without, from said time defining firing signal received
The ignition time T ₀ is obtained, the ignition is performed at the ignition time T ₀ , and a plurality of detonating devices are fired at the same time. However, if any command radio wave is received, the firing time T ₀ determined by the time-specified firing signal is the same for all the detonating devices, so that it is possible to reliably fire a plurality of detonating devices simultaneously. Since the firing operation for transmitting the command radio wave a plurality of times can be completed in a short time, the time from the start of the firing operation to the firing is short, and the firing can be performed simultaneously with high accuracy.

The time-specified firing signal includes a firing command and data indicating the number of times the transmitted time-specified firing signal is the total number of transmissions. Whether there is data, transmission interval data,
The ignition time T is determined based on the time required from decoding of the time-specified ignition signal to output of the ignition signal and the ignition timing adjustment time.
_{When 0} is obtained, the time-defined firing signal is simple, the data amount is small, and transmission can be performed in a short time with high reliability.

Further, in the detonator, if the firing time T ₀ is updated based on the latest received time-specified firing signal, the time from reception of the time-specified firing signal to firing becomes shorter, so that time variation occurs. Difficult and can be fired all at once with high accuracy.

The radio detonator of the present invention is a radio detonator comprising a command device for transmitting a detonation command radio wave and a plurality of detonators for receiving and firing the command radio wave. Multiple detonators in advance
Time regulation for simultaneous firing at the specified firing time T ₀
The ignition signal is configured to multiple forward signals at predetermined intervals, each <br/> detonator, upon receiving the time specified ignition signal, its
Without replying to the effect that the command device, the firing time T ₀ from the time specified ignition signal received seeking the ignition time T ₀
, And the effect can be obtained by implementing the above method.

The command device is configured to transmit a time-specified firing signal including a firing command and data indicating the number of times of transmission of the total number of transmissions at a predetermined interval, and the detonating device receives the signal. Data of the number of times the time-specified firing signal is the time-adjusted firing signal, transmission interval data, and the time required from decoding of the time-defined firing signal to output of the firing signal,
Seeking firing time T ₀ on the basis of the ignition timing adjustment time configured to ignite at that time T _0, further detonator, based on the time specified ignition signal received to date
By configuring to update the ignition time T _0, it is possible to obtain the above effect.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wireless detonator according to an embodiment of the present invention. FIG.

In FIGS. 1 and 2, A is a command device, and B is a detonator, each of which is shown one by one in FIG. 1. Actually, a plurality of detonators B are provided at a predetermined distance. is set up.

The command device A includes an operation / display unit 1, a control unit 2, a transmission / reception unit 3, and an antenna 4. On the other hand, the detonator B includes an antenna 5 and a transmitting / receiving unit 6.
, A control unit 7 and a signal generation unit 8 for outputting a firing signal. The ignition device 9 is operated in response to the ignition signal output from the signal generation unit 8, and the explosive 11 stored in the case 10 is ignited.

In the command device A, the operator inputs a command to be transmitted to the detonator B on the operation / display unit 1. Then, the control unit 2 creates a command message in accordance with the command message, and transmits the command message on a radio wave using the transmission / reception unit 3 and the antenna 4. In the detonation device B, the antenna 5 and the transmission / reception unit 6 receive radio waves from the command device A, the control unit 7 decodes the command message, activates the signal generation unit 8 and outputs an ignition signal to the ignition device 9. .

The operation will be described in detail with reference to FIG.
When the operator performs the simultaneous firing command operation with the command device A,
The command device A executes the simultaneous firing command transmission program in FIG. This simultaneous firing command transmission program includes:
Transmission availability determination (step # 1), message generation processing (step # 2), sequence number assignment (step # 3), message transmission (step # 4), and sequence number change (step #)
5) and a step of determining transmission end (step # 6). That is, it is first determined in step # 1 whether or not it is a good situation to send the simultaneous firing command, then a message is created in step # 2, and then the number N
To 0 are sequentially transmitted.

Upon receiving the simultaneous firing command message, the detonating device B executes the simultaneous firing command receiving program shown in FIG. 3 (b). The simultaneous firing command receiving program includes a determination that firing is possible (step # 11) and a timer setting (step # 1).
Step 2) is included. That is, step #
At 11, it is determined whether or not an ignition signal can be output to the ignition device 9. Then, at step # 12, a timer is set for a time until an ignition signal is output according to the sequence number included in the simultaneous ignition command message.

In the detonator B, interrupt processing is performed by an interrupt signal having a period of T (μsec).
The interrupt program of (c) is executed. The interrupt program includes a timer setting determination (step # 13), a timer clock (step # 14), and a timer end determination (step # 1).
5) and a step of firing signal output (step # 16). That is, it is determined whether or not the timer is set at step # 13 for each T (μsec), then the timer is measured at step # 14, and then it is determined whether or not the timer is completed at step # 15. Step #
At 16, an ignition signal is output. As for the interruption period T, the time can be measured with higher accuracy as the time is shorter. This can reduce the individual difference in ignition time, that is, the ignition gap,
The optimum value is determined from the processing speed of each program and the tolerance of the firing deviation.

FIG. 4 shows that a single command device A intermittently transmits a plurality of firing devices B at predetermined intervals (five in the illustrated example) a time-defined firing signal from the start of transmission to firing. The state up to signal output is shown. That is, the command device A sequentially transmits the time-specified firing signal 4 including the sequence number to the time-specified firing signal 0. Now, assuming that the output interval of the time-defined firing signal is X (ms), and that the sum of the time required from decoding of the time-defined firing signal to the output of the firing signal and the firing timing adjustment time is Y (ms), The detonating device B that has received the prescribed firing signal 4 outputs (4X +
Y) The timer is set to ms, and when the time-defined firing signal 3 is received, the timer setting is updated to (3X + Y) ms. Similarly, the timer setting is updated according to the order number (2 to 0) of the received time-specified firing signal, and the firing signal is output at the end of the timer counting. Therefore, this timer setting is one of five opportunities to receive the time-defined firing signal.
It is sufficient that the signal is received several times, so that a plurality of detonators B can be fired simultaneously with high probability. In addition, even when the timer is set after the time-specified firing signal has been received, the timer can be reset and the time counted by the timer can be shortened, so that the firing signal output time becomes more accurate.

The output interval X (ms) must be greater than the sum of the time required to receive the time-specified firing signal and the time required to decode the time-specified firing signal. Also,
If the firing timing adjustment time is not required, only the required time from decoding of the time-defined firing signal to output of the firing signal is Y (ms).

Now, assuming that the command device A transmits a simultaneous firing command message, the number of bits of the simultaneous firing command message received by the detonating device B is C, and the bit error rate of the transmission is E, the message is transmitted. The probability F1 of a statement failure is F1 = C × E. On the other hand, the probability Fn that the transmission of all the simultaneous firing command messages fails n times is Fn = (C × E) ⁿ . In other words, an increase in the number of times the simultaneous firing command is transmitted has the effect of improving the command achievement rate exponentially.

In the case of a conventional command firing requiring a response, if the command transmission time of the command device is T, the response reception time is R, the number of retransmissions is m, and the number of detonators is k, the first command is issued. The time that the detonator counts is the longest, and that time H1
Is H1 = (T + R) × (1 + m) × k− (T + R).

On the other hand, in the case where the command device A transmits the simultaneous firing command message n times and causes the plurality of detonating devices B to output the firing signal, after the detonating device B receives the simultaneous firing command message. The time until the firing signal is output is the longest when only the first simultaneous firing command message is received,
The time H2 is H2 = T × (n-1).

That is, according to the method of the present invention in which no reply is made, the time that must be measured by the detonator B can be shortened, and the time can be accurately measured so that there is no individual difference. Further, the time from the firing command operation to the firing signal output can be made constant regardless of the number of the detonating devices.

[0026]

According to the wireless detonator method and apparatus of the present invention, even in the remote operation by easily wireless occur disorders such - noise, if any of the command electric wave is received, a plurality of detonators It is possible to reliably fire all at once, and since the firing operation of transmitting the command radio wave several times is completed in a short time, the time from the start of the firing operation to the firing is short, and the firing can be performed simultaneously with high accuracy, Multiple explosives can be detonated simultaneously and reliably without affecting each other,
This has the effect that the amount of explosive that is always suitable for the situation can be used.

The time-specified firing signal includes a firing command and data indicating the number of times the transmitted time-specified firing signal is the total number of transmissions. Whether there is data, transmission interval data,
When the firing time is determined based on the time required from decoding of the time-specified firing signal to output of the firing signal and the firing timing adjustment time, the time-defined firing signal is simple, the data amount is small, and the data is transmitted in a short time with high reliability. can do.

In the detonator, when the firing time is updated based on the most recently received time-specified firing signal, the time from reception of the time-defined firing signal to firing is shortened.
Time variation is less likely to occur, and the ignition can be performed simultaneously with high accuracy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a command device and a detonator of a wireless detonator according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of each device in the embodiment.

FIG. 3 is a flowchart of an operation program of each device of the embodiment.

FIG. 4 is an explanatory diagram of an operation state in the embodiment.

[Explanation of symbols]

 A command device B initiator 1 operation / display unit 2 control unit 3 transmission / reception unit 6 transmission / reception unit 7 control unit 8 signal generation unit 9 firing device

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tsuyoshi Yoshida 2-25 H-302 Hashimizu, Yokosuka City, Kanagawa Prefecture (72) Inventor Akio Sato 3-16 Namamugi, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture No. 5 (72) Invention Person Satoshi Tanizawa 1863 Kamizuruma 1 Sagamihara City, Kanagawa Prefecture (56) References JP-A-7-301500 (JP, A) JP-A-10-239000 (JP, A) JP-A-1-107100 (JP, A JP-A-60-221700 (JP, A) JP 4-67120 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F42B 3/00-3/28 F42D 1 / 00-7/00

Claims (6)

(57) [Claims] A command radio is transmitted from a command device, a command radio is received by a plurality of detonators , and a predetermined firing is performed.
A wireless detonator method ignite simultaneously a plurality of detonators at time T _0, the command radio from the command device, a plurality of electromotive
When the <br/> time specified ignition signal when the order to simultaneously ignite the explosion device to the ignition time T _0, and transmits a plurality of times at predetermined intervals, which receives the time specified ignition signal in each detonator, that effect To
Without replying to the command device, from the time specified ignition signal received seeking the ignition time T ₀ ignite its firing time T _0, the radio detonator wherein the ignite simultaneously a plurality of detonators. 2. The time-specified firing signal includes a firing command and data indicating the number of times the transmitted time-specified firing signal is the total number of transmissions. The ignition time T ₀ based on the presence or absence data, the transmission interval data, the time required from the decoding of the time-defined ignition signal to the output of the ignition signal, and the ignition timing adjustment time.
2. The wireless detonation method according to claim 1, wherein In 3. detonator, wireless detonator method according to claim 1, wherein updating the ignition time T ₀ on the basis of the time specified ignition signal received to date. 4. A wireless detonator comprising a command device for transmitting a detonation command radio wave and a plurality of detonators for receiving and firing the command radio wave .
All at once to the calling to the firing time T ₀ which is determined the number of detonators in advance
Configure the time specified ignition signal to fire so as to more forward <br/> signal at predetermined intervals, each detonator, the time stipulated firing
When receiving a signal, reply to the command device to that effect
And the ignition time T _{0 based on} the received time regulation ignition signal.
Wireless detonator being characterized in that configured to ignite on the firing time T ₀ the asking. 5. The command device is configured to transmit a time-specified firing signal including a firing command and data indicating the number of transmissions of the total number of transmissions a plurality of times at predetermined intervals. and one of the data time prescribed ignition signal is time adjusted ignition signal many times, and duration of the transmission interval data from decode time specified ignition signal to ignition signal output, firing on the basis of the ignition timing adjustment time wireless detonator according to claim 4, characterized by being configured to ignite at that time T ₀ seek time T _0. 6. A detonator, wireless detonator according to claim 4 or 5, wherein to characterized by being configured to update the ignition time T ₀ on the basis of the time specified ignition signal received to date.