When the second seismic wave, that is, the transverse wave, came, due to the lack of directionality, the other seven mechanisms were all triggered, but each of the seven Duzhu hammers could not land o

When the second seismic wave, that is, the transverse wave, came, due to the lack of directionality, the other seven mechanisms were all triggered, but each of the seven Duzhu hammers could not land on the Duzhu normally and could not shoot down the pellets. Therefore, it is in line with the record in the literature that "although one dragon moves its engine, the seven heads do not move". No matter which direction an earthquake occurs, the seismometer can measure the direction of the earthquake source. The seismometer is buried underground and can be directly impacted by seismic waves. Just like the "earth listening" technology that existed during the Warring States Period, it not only reduces ground interference but also increases sensitivity. The pit is paved with sand and fine soil and tightly packed, which can amplify the seismic wave amplitude by three to four times; the thrust plate and the first-level amplification lever can amplify the seismic wave amplitude by about 100 times by adjusting it. The sensitivity of the Houfeng seismograph is very high. The amplitude of a first-level earthquake is 1-4MM, and the lateral distance between the contact surface between the gear machine and the latch is about 4MM. As long as the amplitude is amplified 8-10 times, the earthquake alarm can be triggered. . The thrust plate mechanism of the corridor is similar to the anti-theft mechanism of tombs in the Qin and Han Dynasties, and is also similar to the "pedal mechanism" of the mousetrap. The pedal and thrust plate are the same component. The thrust plate is buried in the soil of the corridor, and seismic waves come in from the entrance of the corridor and push the thrust plate to trigger the mechanism. The capital pillar hammer of the mechanism is equivalent to the "gate" of the mousetrap. After the mechanism is triggered, the hammer falls on the capital pillar. At the same time, the hammer handle pushes the dragon machine rod to knock down the dragon's mouth. The copper pill falls into the toad's mouth, and the earthquake alarm indicates the direction of the earthquake. The all-round seismometer can accurately measure earthquakes occurring in eight directions, and can also measure earthquakes at the epicenter. When the seismograph is at the epicenter of the earthquake, an earthquake occurs. Seismic waves enter the eight corridors and all eight mechanisms are triggered. Only the copper hammer that falls on the capital pillar first can push the dragon machine rod to knock down the copper pill to report the earthquake. It overcomes the shortcomings of "inverted pendulum" and "suspended pendulum" that cannot detect earthquakes at the source position. When an earthquake occurs at the junction of adjacent directions of the seismograph, or at a nearby location, both mechanisms will be triggered, and only the mechanism that is triggered first can drop copper pellets. The earthquake measurement concept of this technical solution: 1. Decentralized directional earthquake measurement and centralized and unified earthquake reporting. The eight sets of mechanisms in the eight corridors correspond to the eight directions respectively. The combination of partitions and pillars in the eight corridors separates the seismic measurement system into eight independent direction areas. The eight sets of mechanisms and eight hammers use one pillar to move away from the earthquake source. The nearest mechanism triggers the falling weight first to report earthquake information and display the direction of the earthquake source.