阅读说明：本技术 一种硅摆加速度计信号调理装置及系统 (A kind of silicon pendulum accelerometer signal conditioning device and system ) 是由 李逸伦 孙斌 魏芳林 刘海斌 锁晓东 于 2019-08-13 设计创作，主要内容包括：本发明属于加速度计测试技术,具体涉及一种硅摆加速度计信号调理装置及系统。该装置包括：信号调理板、屏蔽盒及外部连接线；其中,屏蔽盒包括相互密封的两个对称腔体；每个对称腔体安装有一个信号调理板；每个信号调理板上焊接有SMA插座,SMA插座从对应对称腔体的腔壁伸出,将与信号调理板与外部连线连接；屏蔽盒的外表面喷有塑黑细皱,且外表面进行导电氧化处理。本发明解决硅摆加速度计测试过程中存在噪声大、滞环试验跳台阶、灵活性低、难以扩展以及测试效率低等问题。(The invention belongs to accelerometers to test technology, and in particular to a kind of silicon pendulum accelerometer signal conditioning device and system.The device includes: signal regulating panel, shielding box and external connection line；Wherein, shielding box includes the two symmetrical cavitys sealed against each other；Each symmetrical cavity is equipped with a signal regulating panel；SMA socket is welded on each signal regulating panel, SMA socket is stretched out from the cavity wall of the symmetrical cavity of correspondence, will be connect with signal regulating panel with aerial lug；The outer surface of shielding box is sprayed with the black scabriculous of modeling, and outer surface carries out electric conductive oxidation processing.The present invention solves that there are noises big, stagnant ring test diving tower rank during silicon pendulum accelerometer test, flexibility is low, is difficult to extend and the problems such as testing efficiency is low.)

1. a kind of silicon puts accelerometer signal conditioning device characterized by comprising signal regulating panel, shielding box and outside connect Wiring；

Wherein, shielding box includes the two symmetrical cavitys sealed against each other；Each symmetrical cavity is equipped with a signal regulating panel；Often Be welded with SMA socket on a signal regulating panel, SMA socket is stretched out from the cavity wall of the symmetrical cavity of correspondence, will with signal regulating panel with Aerial lug connection；The outer surface of shielding box is sprayed with the black scabriculous of modeling, and outer surface carries out electric conductive oxidation processing.

2. the apparatus according to claim 1, which is characterized in that signal regulating panel is using three layers of pcb board design, wherein top Layer is used for signal lead；Middle layer is signal stratum, and bottom is shielding stratum；Lead to the shielding of the signal ground and bottom of middle layer 0 Ω resistance single-point is crossed to be connected；Wherein, meter signal and temperature signal is added to introduce signal regulating panel, four foot of SMA socket by SMA socket It is connect with shielded layer.

3. the apparatus according to claim 1, which is characterized in that the bottom of chamber of the symmetrical cavity of one of shielding box faces out stretching There is baffle, be provided with fixing piece on baffle, in order to be fixedly connected with device with cabinet panel by fixing piece.

4. the apparatus according to claim 1, which is characterized in that it is provided with antiskid fastener outside four seamed edges of shielding box, Antiskid fastener presses two symmetrical cavitys.

5. the apparatus according to claim 1, which is characterized in that signal regulating panel includes: temperature sampling plate or meter is added to sample Plate.

6. the apparatus according to claim 1, which is characterized in that signal regulating panel sampling resistor temperature coefficient is 2ppm/ DEG C.

7. device according to claim 5, which is characterized in that meter signal is added to access plus count sampling plate by external connection line Top layer, input plus meter signal external connection line shielded layer access plus meter sampling plate bottom；

Temperature signal passes through the top layer of external connection line cut-in temperature sampling plate, the shielding of the external connection line of input temp signal The bottom of layer cut-in temperature sampling plate.

8. device according to claim 1-7, which is characterized in that external connection line is single-core shielding line.

9. a kind of silicon puts accelerometer signal conditioning system characterized by comprising signal regulating panel be plus counts the of sampling plate The second silicon that one silicon puts accelerometer signal conditioning device, signal regulating panel is temperature sampling plate puts accelerometer signal conditioning dress It sets, silicon puts accelerometer, power supply, the first matrix switch, the second matrix switch, the first digital voltmeter and the second digital voltage Table；

Wherein, power supply is that silicon puts accelerometer power supply, and silicon puts accelerometer exports plus meter signal and inputs the first silicon and put acceleration Count signal regulating device；The temperature signal that silicon puts accelerometer output inputs the second silicon and puts accelerometer signal conditioning device；The The first matrix switch board of output that one silicon puts accelerometer signal conditioning device imports the first digital voltmeter；Second silicon pendulum accelerates The second matrix switch board of output of degree meter signal regulating device imports the second digital voltmeter.

Technical field

The invention belongs to accelerometers to test technology, and in particular to a kind of silicon pendulum accelerometer signal conditioning device and be System.

Background technique

The external dedicated high precision measurement of accelerometer focuses on testing ground, test equipment (turntable, centrifuge etc.), The data introduction of few independent test systems.Even if having is also the alanysis for testing temperature control fixture many years ago, do not have reference Value.

The test macro construction of domestic inertial acceleration meter is substantially the mode of digital voltmeter, such as 13 institute of Beijing, 33 institutes, 707 institute of Tianjin, with I test pattern it is essentially identical, difference from different accelerometers it is corresponding use different essences The digital voltmeter of degree.Beijing 13 is that the default temperature spot accelerometer test precision of current state is highest, is appointed as by general assembly The calibration test center of inertial acceleration meter, but it is longer, testing efficiency is low there are test period the problems such as, be not suitable for batch producing and survey Examination.

Summary of the invention

The purpose of the present invention is:

Solve that there are noises big, stagnant ring test diving tower rank during silicon pendulum accelerometer test, flexibility is low, is difficult to extend And testing efficiency it is low the problems such as, and extend to the test of other types of accelerometer.

Technical solution of the present invention:

The present invention provides a kind of silicon pendulum accelerometer signal conditioning device, comprising: signal regulating panel, shielding box and outside connect Wiring；

Wherein, shielding box includes the two symmetrical cavitys sealed against each other；Each symmetrical cavity is equipped with a signal condition Plate；SMA socket is welded on each signal regulating panel, SMA socket is stretched out from the cavity wall of the symmetrical cavity of correspondence, will be with signal condition Plate is connect with aerial lug；The outer surface of shielding box is sprayed with the black scabriculous of modeling, and outer surface carries out electric conductive oxidation processing.

Further, signal regulating panel is using three layers of pcb board design, wherein top layer is used for signal lead；Middle layer is letter Number stratum, bottom are shielding stratum；The signal ground of middle layer with the shielding of bottom is connected by 0 Ω resistance single-point；Wherein, add It counts signal and temperature signal and signal regulating panel is introduced by SMA socket, four foot of SMA socket is connect with shielded layer.

Further, the bottom of chamber of one of shielding box symmetrical cavity, which faces out, is extended with baffle, is provided with fixation on baffle Part, in order to be fixedly connected with device with cabinet panel by fixing piece.

Further, it is provided with antiskid fastener outside four seamed edges of shielding box, antiskid fastener is by two symmetrical cavitys Press.

Further, signal regulating panel includes: temperature sampling plate and plus meter sampling plate.

Further, signal regulating panel sampling resistor temperature coefficient is 2ppm/ DEG C

Further, add meter signal by external connection line access plus count the top layer of sampling plate, input plus count the outer of signal The shielded layer access of portion's connecting line plus the bottom of meter sampling plate；

Temperature signal passes through the top layer of external connection line cut-in temperature sampling plate, the external connection line of input temp signal The bottom of shielded layer cut-in temperature sampling plate.

Further, external connection line is single-core shielding line.

The present invention provides a kind of silicon pendulum accelerometer signal conditioning system, comprising: signal regulating panel is to add meter sampling plate The second silicon that first silicon puts accelerometer signal conditioning device, signal regulating panel is temperature sampling plate puts accelerometer signal conditioning Device, silicon pendulum accelerometer, power supply, the first matrix switch, the second matrix switch, the first digital voltmeter and the second digital voltage Table；

Wherein, power supply is that silicon puts accelerometer power supply, and silicon pendulum accelerometer exports plus meter signal inputs the first silicon and puts and adds Speedometer signal conditioning device；The temperature signal that silicon puts accelerometer output inputs the second silicon pendulum accelerometer signal conditioning dress It sets；The first matrix switch board of output that first silicon puts accelerometer signal conditioning device imports the first digital voltmeter；Second silicon The second matrix switch board of output for putting accelerometer signal conditioning device imports the second digital voltmeter.

Beneficial effects of the present invention:

Batch production class testing that can be extended to quartz accelerometer, optical-electrical accelerometer, promotes type of production test system and test Precision and testing efficiency.Signal regulating device of the invention can anti-electromagnetic interference；It is Detection of Weak Signals that the present invention, which corresponds to technology, Technology is, it can be achieved that 10^-9The accurate surveying of A DC current signal；The present invention is designed using signal shielding device of automobile, and corresponding technology is Electromagnetic compatibility technology, the electromagnetic interference that environment where making generates meet the requirement of limit value.

Figure of description

Fig. 1 is the annexation figure that a kind of silicon provided by the invention puts accelerometer signal conditioning system.

Fig. 2 is the schematic diagram that a kind of silicon provided by the invention puts accelerometer signal conditioning device.

Fig. 3 is signal regulating panel mounted inside figure provided by the invention.

Fig. 4 is provided by the invention be signal regulating panel schematic diagram.

Specific embodiment

The present invention is low, difficult for there are noises big, stagnant ring test diving tower rank, flexibility during silicon pendulum accelerometer test The problems such as low with extension and testing efficiency, a kind of silicon pendulum accelerometer signal conditioning device is devised, precision indexing is used in realization Leader determines the static models coefficient of accelerometer: such as bias K₀, constant multiplier K₁, two-term coefficient K₂, misalignment (δ₀/δ_p) etc..

The present invention is from the signal source of silicon pendulum accelerometer obtains, interference source is analyzed, signal regulating device electromagnetic susceptibility point Analysis and testing efficiency etc., which are started with, devises silicon pendulum accelerometer signal conditioning device, it can be achieved that electrical integration test precision Batch production test of 5uV (1 σ, 30 days) and the silicon in no less than 20 channels pendulum accelerometer.

In conjunction with attached drawing 1-4, technical solution is described in detail:

The output signal of silicon pendulum accelerometer reaches signal regulating panel (Fig. 4), single-core shielding line by single-core shielding line 1-2 Shielded layer be connected with the shielding of signal regulating panel, in signal regulating panel, the output signal and accelerometer of accelerometer Temperature signal voltage signal is converted by high precision sampling resistance, matrix switch board 1-4 is transmitted to by twisted-pair shielded wire 1-3 It is acquired.Silicon pendulum+the 15V of accelerometer, GND, -15V are connected 1-1 by three strand shielding line 1-5 with power supply 3631A, to expire Sufficient connection request.

1. conditioning device forms

Signal regulating device mainly forms as shown in the table:

Serial number	Title	Important technological parameters	Quantity
				1	Signal regulating panel	3 laminate of 185mm × 72mm plate thickness 2mm	4
2	Shielding box	200mm×100mm×30mm	2

2. hardware design

Conditioning device is made of signal regulating panel, shielding box (Fig. 2) and cable.Meter sampling plate and temperature sampling plate is added to place It is influenced in shielding box, reducing outside electromagnetic interference.

Signal regulating panel is used for signal lead using three layers of pcb board design, size 185mm × 72mm, top layer, and line width is 30mil；Middle layer is signal stratum, and bottom is shielding stratum, and signal ground is connected with shielding ground by 0 Ω resistance single-point.Plank Upper welding SMA socket (Fig. 3-1) will plus be counted output signal and be introduced, and four foot of SMA socket is connect with shielded layer.1 block signal tuned plate can Realize the sampling of 10 road silicon pendulum accelerometer output signal or silicon pendulum accelerometer temperature signal.

The material of shielding box is aluminium 7050, is made two symmetrical cavitys by monolith material, overall size be 200mm (L) × 100mm (W) × 30mm (H), symmetrical cavity install convenient can be general mutually.Two boards are sub altogether in shielding box, are respectively put into symmetrical In cavity (one piece of plank in a cavity), plank is connect with aerial lug by built-in type SMA socket, and SMA socket is welded on On plank, entirety is formed with plank, not only improves stable signal transmission, is also convenient for the separation of board and box body, be specifically shown in Fig. 2. The black scabriculous of shielding box plastic-spraying, accessory carry out surface conductance oxidation processes, guarantee the shielding connection of plank, shielding box, cabinet.

3. placement-and-routing

Substantially to eliminate the interference that the factors such as external environment electromagnetic noise improve tested instrument output signal, sampling is improved Precision, and the reliability of conditioning device wiring is improved, take following key measures:

1) signal ground and shielding ground separate.

2) signal ground is connect with shielding by the way of single-point connection.

Finally, reducing signal interference using standardized W grades of high-precision precision resistance and only stone polarity free capacitor, mention High RST is credible.Sampling resistor temperature coefficient is 2ppm/ DEG C in accelerometer signal conditioning device.

By the above measure, obtain accurately and true output signal, realize electrical integration test precision 5uV (1 σ, 30 It) and no less than 20 channels silicon pendulum accelerometer test.